CN117600938A - A car for polishing the inner surface of tube blanks that can automatically avoid obstacles - Google Patents

Abstract

The utility model relates to a mechanical design and grinding device technical field disclose a but automatic obstacle avoidance's pipe internal surface dolly of polishing, including the frame main shaft, centering assembly is all installed at frame main shaft both ends, centering assembly installs the removal subassembly in the bottom, frame main shaft periphery one side is rotated and is connected with the fixed disk, fixed disk bottom fixedly connected with spacing, fixed disk top fixedly connected with motor two, motor two output fixedly connected with driving sprocket, frame main shaft periphery mid-side is rotated and is connected with the driving shaft of polishing, the driving shaft of polishing periphery is close to one side fixedly connected with driven sprocket of fixed disk. Through can effectively skip the big defect that tube blank internal surface exists to the effectual structure that protects the dolly of polishing has improved the life of dolly of polishing, can realize polishing of great tube blank internal diameter scope, and need not to require the tube blank to rotate around self axis when polishing, and the application scene is more extensive.

Description

A car for polishing the inner surface of tube blanks that can automatically avoid obstacles

Technical field

The invention relates to the technical field of mechanical design and grinding devices, specifically a grinding car for the inner surface of a tube blank that can automatically avoid obstacles.

Background technique

Grinding is a type of surface modification technology. It generally refers to a processing method that uses rough objects (sandpaper containing higher hardness particles, etc.) to change the physical properties of the material surface through friction. The main purpose is to obtain a specific surface roughness. For tube blanks (non-slender tubes) with a relatively large length and diameter, it is difficult to contact and polish the inner surface due to the length of the tube blank. The current grinding method mainly uses inner bore grinding, that is, using a grinding rod to extend into the tube to drive The thousand impeller or homemade abrasive belt wheel rotates at high speed and grinds along with the rotation of the tube blank itself. While rotating, the grinding rod slowly advances. However, when polishing the tube blanks with different diameters, different grinding heads need to be replaced, resulting in high equipment cost and grinding time. There are many spare parts for the head and low productivity; at the same time, during the grinding process, due to the excessive length of the grinding rod, deflection and large defects on the inner surface of the tube blank, grinding instability is likely to occur, thus affecting the grinding accuracy. For this reason, the present invention proposes a trolley for polishing the inner surface of the tube blank that can automatically avoid obstacles.

Contents of the invention

In view of the shortcomings of the existing technology, the present invention provides a trolley for polishing the inner surface of the tube blank that can automatically avoid obstacles, which solves the existing problems in the prior art that the polishing rod is too long, the deflection occurs, and the inner surface of the tube blank exists. , are prone to grinding instability, thus affecting the accuracy of grinding.

In order to achieve the above objectives, the present invention is realized through the following technical solutions: a trolley for polishing the inner surface of tube blanks that can automatically avoid obstacles, including a frame spindle, and centering components are installed on both ends of the frame spindle. A moving component is installed at the bottom of the core assembly. A fixed plate is rotatably connected to one side of the outer circumference of the main shaft of the frame. The bottom of the fixed plate is fixedly connected to a limit frame. The top of the fixed plate is fixedly connected to two motors. The output ends of the two motors are fixed. A driving sprocket is fixedly connected, a grinding driving shaft is rotatably connected to the middle side of the outer periphery of the main shaft of the frame, and a driven sprocket is fixedly connected to the outer periphery of the grinding driving shaft close to the fixed plate. The driven sprocket The outer periphery of the driving sprocket is connected to the outer periphery of the driving sprocket by a chain. There are three mounting brackets fixedly connected to the middle part of the outer periphery of the grinding driving shaft. A grinding driven lever is rotatably connected to the outside of the mounting bracket. The grinding driven lever is far away from the grinding driven sprocket. A connecting seat is fixedly connected to one end of the mounting frame, a grinding block is fixedly connected to the outside of the connecting seat, a chute is provided inside the grinding driven lever, and an adjusting component is installed on the other side of the outer periphery of the main shaft of the frame. An obstacle avoidance connection assembly is installed between the assembly and the grinding driving shaft.

Preferably, the centering assembly includes a bracket and a moving fulcrum frame. The inside of the bracket is rotatably connected to the outer periphery of the main shaft of the frame. The outer periphery of the bracket is rotatably connected to three centering driven rods. The centering driven rod is rotatably connected to the outer periphery of the frame. One end away from the bracket is rotatably connected to a centering wheel frame. Wheel frame covers are fixedly connected to both sides of the centering wheel frame. A polyurethane rubber-coated bearing is rotatably connected to the inner side of the wheel frame cover. Inside the mobile fulcrum frame The thread is connected to the outer periphery of the main shaft of the frame, and a centering active rod is provided between the outer periphery of the moving fulcrum frame and the middle part of the centering driven rod.

Preferably, one end of the centering active rod is rotatably connected to the middle part of the centering driven rod, and the other end of the centering active rod is rotatably connected to the outside of the moving fulcrum frame.

Preferably, the mobile component includes a walking frame, the top of the walking frame is rotatably connected to the bottom of one of the brackets, a motor is fixedly connected to one side of the top of the walking frame, and the output end of the motor is fixedly connected to a driving belt. wheel, the bottom end of the walking frame is fixedly connected to an arc-shaped block, and the top of the arc-shaped block is provided with buckle plates on both sides. A mounting wheel frame is fixedly connected between the bottoms of the two buckle plates. The mounting wheel frame A rotating shaft is rotatably connected to the inner side, a running wheel is fixedly connected to one side of the outer circumference of the rotating shaft, and a driven pulley is fixedly connected to the other side of the outer circumference of the rotating shaft. A synchronous belt is used between the driven pulley and the driving pulley. Connected, there are two support shafts rotatably connected to the outside of the walking frame, and an electric telescopic rod is fixedly connected to the outer periphery of the support shaft. The output ends of the two electric telescopic rods are hingedly connected to the tops of the two gusset plates. A walking active rod is provided between the middle part of the walking frame and one of the moving fulcrum frames.

Preferably, there are square holes between the tops of the two gusset plates, and the bottom of the walking frame is slidingly connected inside the square holes. There is a gap at the top of one of the gusset plates, and the timing belt runs through the said square holes. gap.

Preferably, the bottoms of the two gusset plates are provided with arcuate grooves, and the outer sides of the arcuate blocks are slidably connected between the interiors of the two arcuate grooves.

Preferably, one end of the walking active rod is rotatably connected to the middle part of the walking frame, the other end of the walking active rod is rotatably connected to the bottom of one of the moving fulcrum frames, and the outer side of the walking active rod is slidingly connected to the limiter. Inside the rack.

Preferably, the adjustment assembly includes a rotating disk, the middle part of the rotating disk is rotatably connected to the outer periphery of the main shaft of the frame, and three positioning shafts are fixedly connected to one edge of the rotating disk close to the fixed disk, and the positioning shafts are The outer periphery penetrates and is slidably connected inside the chute.

Preferably, the obstacle avoidance connection assembly includes three stop blocks and a drive ring. The stop blocks are fixedly connected to the side of the outer periphery of the grinding driving shaft close to the rotating disk, and between the three stop blocks Distributed in an equidistant circle, the drive ring is fixedly connected to the middle of one side of the rotating disk close to the grinding driving shaft. Three equidistantly distributed drive blocks are fixedly connected to the outside of the drive ring. The outside of the stop block Set between two adjacent driving blocks.

Preferably, locking parts are installed on both sides of the outer periphery of the main shaft of the frame, and the locking parts are arranged between the moving fulcrum frame and the bracket.

Working principle: When polishing the inner surface of the tube blank, first manually rotate the main shaft of the frame to drive the moving fulcrum frames on both sides to move to both ends respectively, thereby causing the centering driven rod to expand outward and drive the centering wheel frame to move upward. The installed arc-shaped polyurethane rubber-coated bearing fits the inner surface of the tube blank; at the same time, the electric telescopic rod of the moving component is adjusted to realize fine-tuning of the installed wheel frame, so that the running wheel and the inner surface of the tube blank fit tightly. Start the second motor, and drive the grinding driving shaft to rotate through the grinding roller chain, so that the mounting bracket on the grinding driving shaft drives the grinding driven lever to expand outward; when the grinding block does not contact the inner surface of the tube blank, due to the large rotational inertia of the rotating disk, The positioning shaft on the rotating disc will only move relatively inside the chute in the middle of the grinding driven lever. The grinding driven lever will not drive the rotating disc to rotate; when the grinding block contacts the inner surface of the tube blank, the end of the driven lever will grind due to the grinding block. Under the force, under the continuous driving of the second motor, the grinding driven bar will transmit power to the shaft on the rotating disk through the cooperation of the chute and the positioning shaft, driving the rotating disk to rotate together, thereby realizing the polishing of the inner surface of the tube blank. When grinding is stable, the motor is started to drive the running wheel to rotate, causing the grinding car to feed axially inside the tube blank, thereby polishing the entire inner surface of the tube blank. When the grinding block grinds to a large defect inside the tube blank, the grinding block will encounter resistance. Due to the increase in the instantaneous grinding force, the rotation speed of the grinding block will decrease, thereby driving the grinding driven lever and grinding driving shaft to decrease in rotation speed; however, Due to the large rotational inertia of the rotating disk, the rotating disk will still rotate at the original speed, that is, the rotating disk rotates relative to the grinding driving shaft, thereby driving the positioning shaft on the rotating disk to move in the chute of the grinding driven lever, so that the grinding process will continue. The moving bar will shrink inward slightly to achieve automatic obstacle avoidance. When the rotating disc rotates relative to the grinding driving shaft beyond a certain angle, the driving block near the center of the circle will contact the stop block at one end of the grinding driving shaft and squeeze each other, and under the continuous driving of motor two, the grinding driving shaft will The speed of the rotating disc becomes consistent and grinding continues steadily.

The invention provides a trolley for polishing the inner surface of a tube blank that can automatically avoid obstacles. It has the following beneficial effects:

1. The grinding trolley of the present invention has a light structure and is easy to handle. It can grind a larger inner diameter range of the tube blank without requiring the tube blank to rotate around its own axis during grinding. The application scenarios are more extensive.

2. The grinding trolley of the present invention can effectively skip large defects existing on the inner surface of the tube blank during grinding, thereby effectively protecting the structure of the grinding trolley and extending the service life of the grinding trolley.

Description of drawings

Figure 1 is a perspective view of the present invention;

Figure 2 is a schematic structural diagram of the mobile fulcrum frame of the present invention;

Figure 3 is a schematic diagram of the bracket structure of the present invention;

Figure 4 is a schematic structural diagram of the walking frame of the present invention;

Figure 5 is a schematic structural diagram of the walking active rod of the present invention;

Figure 6 is a schematic structural diagram of the limiting frame of the present invention;

Figure 7 is a partial exploded view of the present invention;

Figure 8 is a schematic structural diagram of the stop block of the present invention;

Figure 9 is a schematic structural diagram of the driving block of the present invention.

Among them, 1. Frame spindle; 2. Bracket; 3. Centering driven rod; 4. Centering wheel frame; 5. Wheel frame cover; 6. Polyurethane coated bearing; 7. Moving fulcrum frame; 8. Centering Driving rod; 9. Walking frame; 10. Motor one; 11. Driving pulley; 12. Arc block; 13. Clamp plate; 14. Arc groove; 15. Installation wheel frame; 16. Rotating shaft; 17. Travel wheel ; 18. Driven pulley; 19. Timing belt; 20. Support shaft; 21. Electric telescopic rod; 22. Notch; 23. Traveling active rod; 24. Fixed plate; 25. Limiting frame; 26. Motor two; 27. Driving sprocket; 28. Grinding driving shaft; 29. Driven sprocket; 30. Chain; 31. Mounting bracket; 32. Grinding driven rod; 33. Connecting seat; 34. Grinding block; 35. Slide; 36. Stop block; 37. Rotating disc; 38. Positioning shaft; 39. Driving ring; 40. Driving block; 41. Locking piece.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings of the description of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of the present invention.

Example:

Please refer to accompanying drawings 1 to 9. The embodiment of the present invention provides a trolley for polishing the inner surface of tube blanks that can automatically avoid obstacles, including a frame spindle 1. The frame spindle 1 is the support structure of the entire grinding trolley, which can ensure that the trolley All components operate stably. Centering components are installed at both ends of the main shaft 1 of the frame. The centering components allow the trolley to be quickly installed at the center position inside the tube blank to facilitate subsequent polishing of the inner wall of the tube blank. A moving component is installed at the bottom of the centering component. The moving component allows the trolley to move inside the tube blank, thereby performing all-round polishing of the inner wall of the tube blank.

A fixed plate 24 is rotatably connected to one side of the outer circumference of the main shaft 1 of the frame. The bottom of the fixed plate 24 is fixedly connected to a limit frame 25. The top of the fixed plate 24 is fixedly connected to a second motor 26. The output end of the second motor 26 is fixedly connected to a driving sprocket 27. The machine A grinding driving shaft 28 is rotatably connected to the middle side of the outer periphery of the frame main shaft 1. A driven sprocket 29 is fixedly connected to the outer periphery of the grinding driving shaft 28 close to the fixed plate 24, and passes between the outer periphery of the driven sprocket 29 and the outer periphery of the driving sprocket 27. Chains 30 are connected.

Specifically, when the trolley is installed on the inner wall of the tube blank, the second motor 26 is started to drive the driving sprocket 27 to rotate, so that the driving sprocket 27 can drive the driven sprocket 29 meshed with the inside of the chain 30 through the chain 30. Rotate, and then the driven sprocket 29 can drive the grinding driving shaft 28 to rotate on the outer circumference of the main shaft 1 of the frame, so that the grinding driving shaft 28 can drive the grinding equipment installed outside it to operate, so that the grinding equipment can grind the inner wall of the tube blank. Perform rotational sanding.

There are three mounting brackets 31 fixedly connected to the middle part of the outer periphery of the grinding driving shaft 28. The outside of the mounting bracket 31 is rotatably connected to a grinding driven lever 32. The end of the grinding driven lever 32 away from the mounting bracket 31 is fixedly connected to a connecting seat 33, and the outer side of the connecting seat 33 is fixed. A grinding block 34 is connected, a chute 35 is provided inside the grinding driven lever 32, an adjustment component is installed on the other side of the outer circumference of the main shaft 1 of the frame, and an obstacle avoidance connection component is installed between the adjustment component and the grinding driving shaft 28.

Specifically, when the grinding driving shaft 28 is driven to rotate, the mounting bracket 31 will also rotate accordingly, and then under the action of centrifugal force, the grinding driven lever 32 connected to the mounting bracket 31 will continuously flip outwards. And under the restriction of the adjusting component, it is ensured that the grinding driven lever 32 will not be directly thrown out by the centrifugal force. At the same time, with the cooperation of the obstacle avoidance connecting component, it is ensured that when the grinding driving shaft 28 rotates, the adjusting component will also rotate accordingly. At the same time, by avoiding The transmission gap on the connecting assembly is blocked, so that the mounting bracket 31 can push the grinding driven lever 32 to move outward for a certain distance on the adjusting assembly, and the grinding block 34 will be ejected under the action of centrifugal force and come into contact with the inner wall of the tube blank, thereby polishing the tube. The inner wall of the blank is polished. This prevents the synchronous rotation of the adjusting assembly and the grinding driving shaft 28 from causing the grinding driven lever 32 and the grinding block 34 to be unable to extend, so that the grinding car can automatically extend the grinding structure and fit it with the inner wall of the tube blank when it is started, adapting to Grinding of pipe blanks with different diameters.

The centering assembly includes a bracket 2 and a moving fulcrum frame 7. The inner part of the bracket 2 is rotatably connected to the outer circumference of the main shaft 1 of the frame. The outer circumference of the bracket 2 is rotatably connected to three centering driven rods 3. The centering driven rod 3 rotates at one end away from the bracket 2. It is connected with a centering wheel frame 4. Both sides of the centering wheel frame 4 are fixedly connected with a wheel frame cover 5. The inner side of the wheel frame cover 5 is rotatably connected with a polyurethane rubber-coated bearing 6. The movable fulcrum frame 7 is internally threadedly connected to the main shaft 1 of the frame. On the outer periphery, a centering driving rod 8 is provided between the outer periphery of the moving fulcrum frame 7 and the middle part of the centering driven rod 3 .

Specifically, the centering component is placed inside the tube blank to ensure that the bracket 2 will not rotate randomly on the frame spindle 1, and then the two movable fulcrum frames 7 are driven to move in opposite directions by rotating the frame spindle 1, so that the movable fulcrum frame 7. Push the centering active rod 8 to unfold the centering driven rod 3 outwards, and then make the centering driven rod 3 unfold outwards and push the centering wheel frame 4 at its end toward the inner wall of the tube blank until it moves The two polyurethane-coated bearings 6 on the centering wheel frame 4 are in contact with and close to the inner wall of the tube blank. Since the three centering active rods 8 are synchronously pushed by the moving fulcrum frame 7, the three centering The driven rod 3 will also expand outward synchronously. When one group of polyurethane-coated bearings 6 contacts the inner wall of the tube blank, the other two groups of polyurethane-coated bearings 6 also synchronously contact the inner wall of the circular tube blank. Then, the centering process of the grinding trolley is completed, so that the grinding trolley is at the center position inside the tube blank, which facilitates subsequent grinding operations and ensures that the rotating grinding block 34 can evenly polish the inner wall of the tube blank.

One end of the centering driving rod 8 is rotatably connected to the middle part of the centering driven rod 3 , and the other end of the centering driving rod 8 is rotatably connected to the outside of the moving fulcrum frame 7 . When the moving fulcrum frame 7 moves, it can push the centering active rod 8 to move, and then the centering active rod 8 can push the centering driven rod 3 to extend outward, or it can reversely rotate the main shaft of the frame after grinding. 1. Drive the two moving fulcrum frames 7 to move toward each other, thereby pulling the centering active rod 8 and retracting the centering driven rod 3.

The mobile component includes a walking frame 9. The top of the walking frame 9 is rotatably connected to the bottom of one of the brackets 2. A motor 10 is fixedly connected to one side of the top of the walking frame 9. The output end of the motor 10 is fixedly connected to a driving pulley 11. The bottom of the walking frame 9 An arc block 12 is fixedly connected to the end, and buckle plates 13 are provided on both sides of the top of the arc block 12. A mounting wheel frame 15 is fixedly connected between the bottoms of the two buckle plates 13, and a rotating shaft 16 is rotatably connected to the inside of the mounting wheel frame 15. A running wheel 17 is fixedly connected to one side of the outer circumference of the rotating shaft 16, and a driven pulley 18 is fixedly connected to the other side of the outer circumference of the rotating shaft 16. The driven pulley 18 and the driving pulley 11 are connected through a synchronous belt 19, and the outer side of the walking frame 9 rotates Two support shafts 20 are connected, and an electric telescopic rod 21 is fixedly connected to the outer periphery of the support shaft 20. The output ends of the two electric telescopic rods 21 are hingedly connected to the tops of the two buckle plates 13, and the middle part of the walking frame 9 is connected to one of the moving fulcrum frames 7 A walking active rod 23 is arranged between them.

Specifically, the moving component will contact the inner wall of the tube blank as the centering component expands. By activating the two sets of electric telescopic rods 21 on the side to push the gusset plate 13 to move, the gusset plate 13 can fine-tune the angle of the gusset plate 13 with the cooperation of the arc groove 14 and the arc block 12, thereby allowing the installation to be easier. The contact between the running wheel 17 on the inside of the wheel frame 15 and the inner wall of the tube blank is closer, which increases the friction between the running wheel 17 and the inner wall of the tube blank and avoids slipping when the trolley moves. Then, the motor 10 is started to drive the driving pulley 11 to rotate, so that the driving pulley 11 drives the driven pulley 18 to rotate through the cooperation of the synchronous belt 19, and then the driven pulley 18 drives the rotating shaft 16 and the running wheel 17. Rotate, when the running wheel 17 rotates, it can cooperate with the inner wall of the tube blank to drive the grinding car to move inside the tube blank. Then, the rotating grinding block 34 is used to uniformly grind the inner wall of the tube blank.

There is a square hole between the tops of the two gusset plates 13, and the bottom of the walking frame 9 is slidingly connected inside the square hole. Through the square hole, when the angle of the gusset plate 13 and the mounting wheel frame 15 is fine-tuned, the walking frame 9 and the buckle can be avoided. Motion interference occurs between the plates 13 . There is a notch 22 on the top of one of the buckle plates 13. There is also a notch 22 on the top of the mounting wheel frame 15. The timing belt 19 passes through the notch 22. The notch 22 allows the timing belt 19 to pass through the buckle plate 13 and the mounting wheel frame. 15, thereby driving the traveling wheel 17 to rotate.

The bottoms of the two buckle plates 13 are both provided with arcuate grooves 14 , and the outer sides of the arcuate blocks 12 are slidingly connected between the interiors of the two arcuate grooves 14 . Through the cooperation between the arc groove 14 and the arc block 12, when the electric telescopic rod 21 is started, it can drive the buckle plate 13 and the mounting wheel frame 15 to fine-tune the angle along the arc block 12, so that the running wheel 17 and the tube blank The inner walls are in closer contact.

One end of the walking active rod 23 is rotatably connected to the middle part of the walking frame 9, and the other end of the walking active rod 23 is rotatably connected to the bottom of one of the moving fulcrum frames 7, so that the frame spindle 1 drives the moving fulcrum frame 7 to move to expand or store the centering assembly. At this time, the moving fulcrum frame 7 can synchronously push or pull the walking active rod 23 to flip the walking frame 9 downward and open, or flip up and stow it away. The outer side of the traveling driving rod 23 is slidingly connected to the inner side of the limiting frame 25. When the centering assembly is unfolded, multiple sets of polyurethane-coated bearings 6 on the outer side will be in close contact with the inner wall of the tube blank. Therefore, after the centering component is deployed, the centering component remains stationary inside the tube blank and will not rotate. When the limiting frame 25 is inserted into the outer periphery of the traveling active rod 23, when the second motor 26 is started, the cooperation between the limiting frame 25 and the traveling active rod 23 can ensure that the fixed plate 24 will not move along the outer circumference of the frame spindle 1. The phenomenon of rotation occurs, which causes the fixed plate 24 and the second motor 26 to remain stationary inside the tube blank, so that the driving sprocket 27 can rotate and drive the driven sprocket 29, the grinding driving shaft 28, the grinding block 34 and other structures to rotate. , so that when the grinding block 34 extends out and fits the inner wall of the tube blank, stable grinding can be performed.

The adjustment assembly includes a rotating plate 37. The middle part of the rotating plate 37 is rotatably connected to the outer periphery of the main shaft 1 of the frame. The rotating plate 37 is fixedly connected to three positioning shafts 38 on one edge close to the fixed plate 24. The outer periphery of the positioning shaft 38 penetrates and is slidably connected to the chute. 35 interior.

Specifically, when the grinding driving shaft 28 rotates, the grinding driving shaft 28 can first adjust the assembly to rotate through the obstacle avoidance connection assembly, so that the mounting frame 31 can push the grinding driven lever 32 to move with the cooperation of centrifugal force, and at the same time rotate The disc 37 does not rotate, so that the chute 35 inside the grinding driven lever 32 can cooperate with the positioning shaft 38 on the rotating disc 37 to limit the grinding driven lever 32, so that the mounting bracket 31 pushes the grinding driven lever 32 to move. The grinding driven lever 32 is limited by the inner slide groove 35 and the positioning shaft 38. As the mounting bracket 31 rotates, it will extend outward with the positioning shaft 38 and the slide groove 35 as supports. Until the obstacle avoidance connection assembly connects the grinding driving shaft 28 and the rotating disk 37, the grinding driving shaft 28 and the rotating disk 37 maintain synchronous rotation, and the grinding driven lever 32 is released at this time, and the end of the grinding driven shaft 28 is released. The grinding block 34 is in contact with the inner wall of the tube blank.

The obstacle avoidance connection assembly includes three stop blocks 36 and a drive ring 39. The stop blocks 36 are fixedly connected to the side of the outer circumference of the grinding driving shaft 28 close to the rotating disk 37, and the three stop blocks 36 are equidistantly distributed in the circumference. , the drive ring 39 is fixedly connected to the middle of one side of the rotating disk 37 close to the grinding drive shaft 28. There are three equidistantly distributed drive blocks 40 fixedly connected to the outside of the drive ring 39, and the outside of the stop block 36 is arranged on the two adjacent drive blocks 40. between.

Specifically, when the grinding block 34 grinds a large defect inside the tube blank, the grinding block 34 will encounter resistance. Due to the increase in the instantaneous grinding force, the rotation speed of the grinding block 34 will be reduced, thereby driving the grinding driven lever 32 and The rotation speed of the grinding driving shaft 28 decreases; however, due to the large moment of inertia of the rotating disk 37, the rotating disk 37 will continue to rotate at the original speed, that is, the rotating disk 37 rotates relative to the grinding driving shaft 28, so that the driving block 40 will move from the contact position. One stop 36 is transferred to the side of one stop 36 on the other side. As a result, the positioning shaft 38 on the rotating disk 37 is driven to move inside the chute 35 on the grinding driven lever 32, so that the grinding driven lever 32 will turn and shrink inward slightly along the connection between the grinding driven lever 32 and the mounting bracket 31, thereby achieving The purpose of automatic obstacle avoidance. When the rotating disc 37 rotates over a certain angle relative to the grinding driving shaft 28, the driving block 40 of the rotating disc near the center of the circle will contact and squeeze each other with the stop block 36 at one end of the grinding driving shaft 28, and under the continuous driving of the motor two , so that the rotational speeds of the grinding driving shaft and the rotating disc tend to be consistent. Afterwards, the driving block 40 that moves from the side of the previous stop block 36 to the side of the adjacent stop block 36 on the other side will reset to the previous stop block again under the action of inertia and extrusion. 36 side contact, and then the stop block 36 rotates to drive the driving block 40 to rotate, allowing the grinding driving shaft 28 to drive the rotating disk 37 to rotate synchronously again. At this time, the grinding driven lever 32 extends outward again and interacts with the tube blank. The inner wall is in contact for polishing, allowing subsequent polishing to continue stably.

Locking pieces 41 are installed on both sides of the outer periphery of the main shaft 1 of the frame, and the locking pieces 41 are arranged between the moving fulcrum frame 7 and the bracket 2 . The moving fulcrum frame 7 can be limited by the locking member 41 to ensure that it will not fall off from the outer periphery of the main shaft 1 of the frame.

Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art will understand that various changes, modifications, and substitutions can be made to these embodiments without departing from the principles and spirit of the invention. and modifications, the scope of the invention is defined by the appended claims and their equivalents.

Claims (10)

1. The utility model provides a can keep away dolly of polishing of barrier's tube blank internal surface automatically, includes frame main shaft (1), a serial communication port, centering components is all installed at frame main shaft (1) both ends, centering components installs the removal subassembly in the bottom, frame main shaft (1) periphery one side rotates and is connected with fixed disk (24), fixed disk (24) bottom fixedly connected with spacing (25), fixed disk (24) top fixedly connected with motor two (26), motor two (26) output fixedly connected with driving sprocket (27), frame main shaft (1) periphery middle side rotates and is connected with driving shaft (28) of polishing, driving shaft (28) periphery is close to one side fixedly connected with driven sprocket (29) of fixed disk (24), driven sprocket (29) periphery with link to each other through chain (30) between driving sprocket (27) periphery, driving shaft (28) periphery middle part fixedly connected with three mounting bracket (31), mounting bracket (31) outside rotates and is connected with driven bar (32) of polishing, driven bar (32) side rotation is connected with driven bar (33) one side fixedly connected with driven sprocket (33), an adjusting component is arranged on the other side of the periphery of the main shaft (1) of the machine frame, and an obstacle avoidance connecting component is arranged between the adjusting component and the polishing driving shaft (28).

2. The pipe blank inner surface polishing trolley capable of automatically avoiding barriers according to claim 1, wherein the centering assembly comprises a support (2) and a movable supporting frame (7), the support (2) is internally and rotatably connected to the periphery of a main shaft (1) of the machine frame, three centering driven rods (3) are externally and rotatably connected to the support (2), one ends of the centering driven rods (3) away from the support (2) are rotatably connected with centering wheel frames (4), wheel frame covers (5) are fixedly connected to two sides of each centering wheel frame (4), polyurethane rubber coating bearings (6) are rotatably connected to the inner sides of the wheel frame covers (5), the movable supporting frame (7) is internally and rotatably connected to the periphery of the main shaft (1), and centering driving rods (8) are arranged between the periphery of the movable supporting frame (7) and the middle parts of the centering driven rods (3).

3. The automatic obstacle avoidance pipe blank inner surface polishing trolley according to claim 2, wherein one end of the centering driving rod (8) is rotatably connected to the middle part of the centering driven rod (3), and the other end of the centering driving rod (8) is rotatably connected to the outer side of the movable supporting point frame (7).

4. The automatic obstacle avoidance pipe blank inner surface polishing trolley according to claim 2, wherein the moving assembly comprises a walking frame (9), the top of the walking frame (9) is rotationally connected to the bottom of one of the brackets (2), one side of the top of the walking frame (9) is fixedly connected with a first motor (10), the output end of the first motor (10) is fixedly connected with a driving pulley (11), the bottom end of the walking frame (9) is fixedly connected with an arc-shaped block (12), pinch plates (13) are respectively arranged on two sides of the top of the arc-shaped block (12), a mounting wheel frame (15) is fixedly connected between the bottoms of the two pinch plates (13), a rotating shaft (16) is rotationally connected to the inner side of the mounting wheel frame (15), one side of the periphery of the rotating shaft (16) is fixedly connected with a walking wheel (17), the other side of the periphery of the rotating shaft (16) is fixedly connected with a driven pulley (18), the driven pulley (18) is connected with the driving pulley (11) through a synchronous belt (19), the outer side of the walking frame (9) is rotationally connected with two supporting shafts (20), two electric supporting shafts (20) are fixedly connected with two telescopic shafts (21) respectively, the outer sides of the electric supporting shafts (21) are fixedly connected with two telescopic shafts (21), a walking driving rod (23) is arranged between the middle part of the walking frame (9) and one of the movable supporting point frames (7).

5. The automatic obstacle avoidance pipe blank inner surface polishing trolley according to claim 4, wherein square holes are formed between the tops of the two pinch plates (13), the bottom of the walking frame (9) is slidably connected inside the square holes, a notch (22) is formed in the top of one pinch plate (13), and the synchronous belt (19) penetrates through the notch (22).

6. The automatic obstacle avoidance tube blank inner surface polishing trolley according to claim 4, wherein arc-shaped grooves (14) are formed in the bottoms of the two pinch plates (13), and the outer sides of the arc-shaped blocks (12) are slidably connected between the inner parts of the two arc-shaped grooves (14).

7. The automatic obstacle avoidance pipe blank inner surface polishing trolley according to claim 4, wherein one end of a walking driving rod (23) is rotatably connected to the middle of the walking frame (9), the other end of the walking driving rod (23) is rotatably connected to the bottom of one of the movable supporting point frames (7), and the outer side of the walking driving rod (23) is slidably connected to the inner side of the limiting frame (25).

8. The automatic obstacle avoidance tube blank inner surface polishing trolley according to claim 1, wherein the adjusting assembly comprises a rotating disc (37), the middle part of the rotating disc (37) is rotatably connected to the periphery of the machine frame main shaft (1), three positioning shafts (38) are fixedly connected to the edge of one side of the rotating disc (37) close to the fixed disc (24), and the periphery of the positioning shafts (38) penetrates through and is slidably connected to the inside of the sliding groove (35).

9. The automatic obstacle avoidance pipe blank inner surface polishing trolley according to claim 8, wherein the obstacle avoidance connecting assembly comprises three stop blocks (36) and a driving ring (39), the stop blocks (36) are fixedly connected to one side, close to the rotating disc (37), of the outer periphery of the polishing driving shaft (28), the three stop blocks (36) are distributed in an equidistant circumference mode, the driving ring (39) is fixedly connected to the middle of one side, close to the polishing driving shaft (28), of the rotating disc (37), three driving blocks (40) distributed in an equidistant mode are fixedly connected to the outer side of the driving ring (39), and the outer sides of the stop blocks (36) are arranged between two adjacent driving blocks (40).

10. The automatic obstacle avoidance tube blank inner surface polishing trolley according to claim 2, wherein locking pieces (41) are arranged on two sides of the periphery of the machine frame main shaft (1), and the locking pieces (41) are arranged between the movable supporting point frame (7) and the support (2).