WO2023178816A1 - Novel transmission clutch mechanism and gearbox thereof - Google Patents

Abstract

A transmission clutch mechanism and a gearbox thereof. The clutch mechanism comprises: a trigger member (1) used for triggering the clutch mechanism to start locking and unlocking actions; a first locking member (2) and a second locking member (3) used for executing the locking and unlocking actions; and a rotary wheel (4). The cross-sectional shape of the first locking member (2) is of an arch-shaped structure. During gear shifting, under the drive of the trigger member (1), the first locking member (2) moves towards the inner profile along the outer profile of the second locking member (3), and when the inner profile is reached, the second locking member (3) abuts against the rotating rotary wheel (4), so as to lock the clutch mechanism. The clutch mechanism can complete gear shifting when there is a large load on the rotary wheel (4). During unlocking, the first locking member (2) can be driven by a small driving force and is not affected by the magnitude of the meshing force between the second locking member (3) and the rotary wheel (4), and the unlocking force is small. By means of the tight fit between the components, when the clutch mechanism is in any working state, the first locking member (2) does not affect the function to be executed due to violent vibration, and the anti-vibration performance is better.

Description

A new type of transmission clutch mechanism and its gearbox Technical field

The present invention relates to the field of clutch technology, and more specifically, to a new type of transmission clutch mechanism and its gearbox.

Background technique

The clutch is located between the power source (which can be an engine, an electric motor or the human body, etc.) and the gearbox. It is used to temporarily separate or gradually connect the power source and the gearbox to cut off the power input to the gearbox. Secondly, the clutch also has the function of changing the power transmission path in the gearbox. Clutches are usually divided into mechanical clutches, electromagnetic clutches, magnetic powder clutches, hydraulic clutches, etc. Among them, mechanical clutches are the most common.

The clutch is the core component of the transmission system. Because it is related to the operating efficiency in frequent and rapid switching of gears, the basic requirements for clutch design are: smooth engagement, rapid and complete separation, convenient and labor-saving operation, small outer size, It has small mass and can absorb enough impact energy. However, existing clutches have some defects. For example, Patent Document 1 (US Patent US201900110037) discloses a bicycle transmission clutch. The clutch is composed of three axes, namely A1 axis, A2 axis, and A3 axis. Among them, A1 axis, A2 axis There are sprockets on the shaft and the A3 shaft, and there is a clutch between the A2 shaft and the A3 shaft. The A1 axis is the input shaft. It increases speed and reduces torque through chain transmission. The power is input to the A2 axis. The clutch selects a sprocket on the A2 axis to match a sprocket on the A3 axis each time, thereby transmitting the power of the A2 axis to the A3 axis. , and output by the A3 axis. However, if there is a large load when shifting gears with this clutch, it cannot shift gears easily and may easily cause damage to the chain.

Patent Document 2 (U.S. Patent US9163702) discloses a transmission device and a transmission mechanism in which there is only one pawl on the clutch meshing with any clutch gear. However, the clutch unlocking force is large, and due to the excessive pursuit of small size, the ratchet and the ratchet are separated. The contact area of the claw is too small. When the transmission ratio increases, the clutch cannot complete the shift when there is a large load on the gear. It must be unloaded to complete, thereby weakening the shifting efficiency, not conducive to absorbing impact energy, and easily damaged.

To sum up, the existing clutch has low gear shifting efficiency, cannot easily shift gears under large loads, and parts are prone to damage, making it impossible to switch gears frequently and quickly.

Contents of the invention

The technical problem to be solved by the present invention is that the existing clutch has low gear shifting efficiency, cannot easily shift gears when bearing a large load, and parts are prone to damage. In view of the above defects of the existing technology, a new transmission clutch mechanism and its transmission are provided. box.

The technical solution adopted by the present invention to solve the technical problem is to construct a new type of transmission clutch mechanism, including: a trigger for triggering the clutch mechanism to start the locking and unlocking actions, and a first lock for executing the locking and unlocking actions. and the second locking piece, as well as the rotating wheel; the cross-sectional shape of the first locking piece is an arcuate structure; when shifting gears, driven by the trigger piece, the first locking piece moves along the second locking piece The outer contour moves toward the inner contour, and when reaching the inner contour, the second locking piece conflicts with the rotating rotating wheel to achieve locking of the clutch mechanism.

Further, the first locking member includes a first fixed hinge support, a first contact arm and a second contact arm provided on the first fixed hinge support; the first contact arm protrudes toward one end, The second contact arm is bent and protruded toward a side opposite to the protruding direction of the first contact arm.

Further, a first roller is provided on the first contact arm; a second roller is provided on the second contact arm.

Further, the second locking member includes a second fixed hinge support, an arc block and a pawl arranged on the second fixed hinge support; the arc block protrudes to one side; and the pawl moves toward The side opposite to the protruding direction of the arc block protrudes.

Further, the surface of the second fixed hinge support is provided with an inner arc surface; the arc block is provided with an outer arc surface connected with the inner arc surface; when shifting gears, the second roller moves along the The outer cambered surface rolls to the inner cambered surface.

Furthermore, the second fixed hinge support is also provided with a transition arc surface connected with the inner arc surface; the inner arc surface is located between the outer arc surface and the transition arc surface.

Further, the rotating wheel is provided with a third fixed hinge support; the surface of the rotating wheel is provided with gear teeth for engaging and connecting with the pawl when shifting gears.

Further, the trigger member includes an active trigger unit; the active trigger unit is a clutch push rod; when the clutch mechanism is locked and unlocked, the clutch push rod contacts the first roller.

Further, the triggering member further includes a passive triggering unit; the passive triggering unit includes a first torsion spring and a second torsion spring; the end of the first torsion spring is connected or in contact with the second contact arm; The end of the second torsion spring is connected or in contact with the arc block.

The present application provides a gearbox, including a novel transmission clutch mechanism as described in any one of the foregoing.

The beneficial effects of the present invention are: using this solution, when shifting gears, the first locking member is an arcuate geometric structure part, which can withstand high-speed impact, is not easily damaged, and improves shifting efficiency. Secondly, when unlocking, the first locking member can be driven by a smaller driving force and is not affected by the engagement force between the second locking member and the rotating wheel, so the unlocking force is small. Furthermore, through the close cooperation between the components and the shape characteristics of the components, when the clutch mechanism is in any working state, the first locking member will not affect its function due to severe vibration, and the vibration resistance is good. .

Description of the drawings

In order to more clearly illustrate the embodiments of the present invention or technical solutions in the prior art, the present invention will be further described below with reference to the drawings and examples. The drawings in the following description are only some embodiments of the present invention. For those in the field Ordinary technicians can also obtain other drawings based on these drawings without exerting creative work:

Figure 1 is a schematic diagram of the clutch mechanism in a locked state according to an embodiment of the present invention;

Figure 2 is a schematic diagram of the clutch mechanism in the unlocked state according to the embodiment of the present invention;

Figure 3 is a schematic diagram of the state when the rotating wheel rotates clockwise according to the embodiment of the present invention;

Figure 4 is a schematic structural diagram of the first locking member according to the embodiment of the present invention;

Figure 5 is a schematic structural diagram of the second locking member according to the embodiment of the present invention;

Figure 6 is a schematic structural diagram of the clutch mechanism in a locked state according to the embodiment of the present invention.

In the figure, 1. Trigger member; 2. First locking member; 3. Second locking member; 4. Rotating wheel; 11. Clutch push rod; 12. First torsion spring; 13. Second torsion spring; 21. A fixed hinge support; 22. First contact arm; 23. Second contact arm; 24. First rolling element; 25. Second rolling element; 31. Second fixed hinge support; 32. Arc block; 33. Outer arc surface; 34, inner arc surface; 35, pawl; 36, transition arc surface; 41, gear teeth; 42, third fixed hinge support.

Detailed ways

In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, a clear and complete description will be given below in conjunction with the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only partial embodiments of the present invention, and Not all examples. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without any creative effort fall within the protection scope of the present invention.

Embodiments of the present invention, as shown in Figures 1 to 6, provide a new type of transmission clutch mechanism, including: a trigger 1 for triggering the clutch mechanism to start locking and unlocking actions, and a first locking part 2 for executing locking and unlocking actions. With the second locking member 3 and the rotating wheel 4; the cross-sectional shape of the first locking member 2 is an arcuate structure; the surface of the rotating wheel 4 is provided with a plurality of continuously connected arcuate surfaces; when shifting gears, driven by the triggering member 1 , the first locking member 2 moves along the outer contour of the second locking member 3 toward the inner contour, and when reaching the inner contour, the second locking member 3 conflicts with the rotating wheel 4 to achieve the locking of the clutch mechanism. .

When the end of the first locking part 2 is at the outer contour of the second locking part 3, the new transmission clutch mechanism is in an unlocked state. When changing from the unlocked state to the locked state (ie, shifting), driven by the trigger 1, the first locking member 2 moves from the outer contour of the second locking member 3 to the inner contour, and when it reaches the inner contour , the end of the second locking piece 3 conflicts with the rotating wheel 4 rotating at high speed. At this time, the rotating wheel 4 causes a large impact force on the first locking piece 2. Since the cross-sectional shape of the first locking part 2 is an arcuate structure, its overall structure is an arcuate geometric structure part. By utilizing the characteristics of the arcuate part, the first locking part 2 can withstand the high-speed impact caused by the rotating wheel 4 .

Using this solution, when shifting gears, the first locking member 2 is an arcuate geometric structure part, which can withstand high-speed impact, can complete shifting when there is a large load on the gear, is not easily damaged, and improves shifting efficiency. Secondly, when unlocking, the first locking member 2 can be driven by a smaller driving force and is not affected by the engagement force between the second locking member 3 and the rotating wheel 4, so the unlocking force is small. Furthermore, through the close cooperation between the components and the shape characteristics of the components, when the clutch mechanism is in any working state, the first locking component 2 will not affect its function due to severe vibration, and the vibration resistance is relatively high. good.

In a further embodiment, as shown in Figure 4, the first locking member 2 includes a first fixed hinge support 21, a first contact arm 22 and a second contact arm 23 provided on the first fixed hinge support 21; The first contact arm 22 protrudes toward one end, and the second contact arm 23 curves and protrudes toward the side opposite to the protruding direction of the first contact arm 22 .

As shown in the figure, the first contact arm 22 protrudes upward to the left, the second contact arm 23 curves and protrudes downward to the left, and its middle part is concave toward the left. As a result, the first locking piece 2 forms an arcuate geometric structure part, which can withstand the impact force brought by the high-speed rotating wheel 4 during the shifting process, can complete the shifting when there is a large load on the gear, and is not easily damaged. Improve shifting efficiency.

In the above embodiment, the first fixed hinge support 21 is used to limit the position of the first locking member 2. It is connected with the shaft body and other parts through bearings, so that it can only rotate but cannot move.

In a further embodiment, the first contact arm 22 is provided with a first rolling element 24 ; the second contact arm 23 is provided with a second rolling element 25 . The first rolling element 24 and the second rolling element 25 may be bearings, rollers or other parts capable of rotating. Using rolling parts for coordination, the connection between various parts is smoother.

In a further embodiment, as shown in FIG. 5 , the second locking member 3 includes a second fixed hinge support 31 , an arc block 32 and a pawl 35 disposed on the second fixed hinge support 31 ; the arc block 32 moves toward One side protrudes; the pawl 35 protrudes toward the side opposite to the protruding direction of the arc block 32.

In a further embodiment, the rotating wheel 4 is provided with a third fixed hinge support 42; the surface of the rotating wheel 4 is provided with gear teeth 41 for engaging and connecting with the pawl 35 when shifting gears.

The second locking member 3 has an arc block 32 and one end of the second fixed hinge support 31 is in contact with the second mounting arm. The pawl 35 is used for engaging and connecting with the gear teeth 41 on the surface of the rotating wheel 4 during shifting, so as to lock the rotating wheel 4 and complete the shifting.

In a further embodiment, the surface of the second fixed hinge support 31 is provided with an inner arc surface 34; the arc block 32 is provided with an outer arc surface 33 connected with the inner arc surface 34; when shifting gears, the second rolling element 25 Roll along the outer arc surface 33 to the inner arc surface 34. Among them, the movement trajectory of the second rolling element 25 when rolling on the outer arc surface 33 forms the above-mentioned outer contour, and the movement trajectory of the second rolling element 25 when rolling on the inner arc surface 34 forms the above-mentioned inner contour, that is, when the trigger member 1 Driven by The gear teeth 41 on the surface of the rotating wheel 4 are engaged and connected to realize the locking of the clutch mechanism.

During the locking process, the second rolling element 25 rolls along the outer arc surface 33 to the inner arc surface 34 . During the unlocking process, the second rolling element 25 rolls along the inner arc surface 34 to the outer arc surface 33 .

In the above embodiment, the second fixed hinge support 31 is used to limit the position of the second locking member 3. It is connected with the shaft body and other parts through bearings, so that it can only rotate but cannot move. The third fixed hinge support 42 is used to limit the position of the third locking member. It is connected with the shaft body and other parts through bearings, so that it can only rotate but cannot move. In a further embodiment, as shown in FIG. 5 , the surface of the second locking member 3 is provided with a transition arc surface 36 that is connected with the inner arc surface 34 . When the rotating wheel 4 rotates clockwise, its gear teeth 41 will drive the second locking member 3 to rotate counterclockwise. At this time, the second rolling member 25 will transfer to the transition arc surface 36 along the inner arc surface 34 . When the second rolling element 25 stays on the transition arc surface 36, the new transmission clutch mechanism is in a clockwise rotation state of the rotating wheel 4.

Based on the above embodiments, it can be seen that the clutch mechanism has three states, namely: locked state, unlocked state, and clockwise rotating state of the rotating wheel 4.

In a further embodiment, the trigger 1 includes an active trigger unit; the active trigger unit is a clutch push rod 11; when the clutch mechanism is locked and unlocked, the clutch push rod 11 is always in contact with the first rolling element 24.

In a further embodiment, the trigger 1 further includes a passive trigger unit; the passive trigger unit includes a first torsion spring 12 and a second torsion spring 13; the end of the first torsion spring 12 is connected or in contact with the second contact arm 23; The ends of the two torsion springs 13 are connected or in contact with the arc block 32 .

The power source of the active triggering unit may be a device capable of applying horizontal force to the clutch push rod 11, such as an electric cylinder, a pneumatic cylinder or manual application. The passive triggering unit may be any structure capable of storing energy, such as a spring, a cylinder, a magnet, etc. In this embodiment, the passive triggering unit uses the first torsion spring 12 and the second torsion spring 13 . The middle part of the first torsion spring 12 and the middle part of the second torsion spring 13 are coaxially arranged with the first locking member 2 and the second locking member 3 respectively, and one ends of the first torsion spring 12 and the second torsion spring 13 are limited, and the other ends are limited. One end is connected or in contact with the second contact arm 23 and the arc block 32 respectively. In the locked state, the clutch push rod 11 retracts, and the compressed first torsion spring 12 drives the first locking member 2 to rotate counterclockwise, causing the second rolling member 25 to roll along the outer arc surface 33 of the second locking member 3 to the inner arc surface 34, during this process, the second locking member 3 is forced to rotate counterclockwise, and the second torsion spring 13 is compressed. The pawl 35 on the second locking member 3 is engaged with the gear teeth 41 of the rotating wheel 4 that rotates counterclockwise at high speed to realize the locking of the clutch mechanism. The first locking part 2 is an arcuate geometric structure part, which can withstand the impact force brought by the rotating wheel 4 during the process, can complete the gear shift when there is a large load on the gear, is not easy to be damaged, and improves the gear shifting efficiency.

When unlocking, the clutch push rod 11 extends, pushes the first rolling member 24 to a designated position and stops. At this time, the first locking member 2 rotates clockwise. During this process, with the cooperation of the compressed second torsion spring 13, the second rolling member 25 rolls along the inner arc surface 34 of the second locking member 3 to the outer arc surface 33. The second locking member 3 rotates clockwise, and the ratchet The pawl 35 is disengaged from the gear teeth 41, and the unrestricted rotating wheel 4 continues to rotate counterclockwise at a high speed. When unlocking, the first locking member 2 can be driven by a small driving force and is not affected by the engagement force between the second locking member 3 and the rotating wheel 4, so the unlocking force is small.

Specifically, when changing from the unlocked state to the locked state, the clutch push rod 11 moves to the left under force and finally stops at a fixed position to limit the first rolling member 24. During the left movement of the clutch push rod 11, the A torsion spring 12 is released and opens, driving the first locking member 2 to rotate counterclockwise. The second rolling member 25 rolls from the outer arc surface 33 on the second locking member 3 to the inner arc surface 34, and finally stays as shown in the figure. The position of the second rolling element 25. The second locking member 3 is driven by the second rolling member 25 to rotate counterclockwise, the second torsion spring 13 is compressed, the pawl 35 at the end is meshed with the gear teeth 41 of the rotating wheel 4 that is rotating counterclockwise, and the rotating wheel 4 is locked. hold, the clutch mechanism becomes locked. The first locking part 2 is an arcuate geometric structure part, which can withstand the impact force brought by the rotating wheel 4 during the process, can complete the gear shift when there is a large load on the gear, is not easy to be damaged, and improves the gear shifting efficiency.

When changing from the locked state to the unlocked state, the clutch push rod 11 is forced to move to the right and finally stops at a fixed position to limit the position of the first rolling element 24 . When the clutch push rod 11 moves to the right, the first locking member 2 is driven to rotate clockwise, the first torsion spring 12 is compressed, and the second rolling member 25 rolls from the inner arc surface 34 of the second locking member 3 to the outer arc surface. 33, and finally stays at any position on the outer arc surface 33. During this process, the second torsion spring 13 is released and opens. At this time, the pawl 35 is disengaged from the gear teeth 41, so that the rotating wheel 4 can rotate counterclockwise at high speed to achieve unlocking.

When changing from the locked state to the clockwise rotation state of the rotating wheel 4, the clutch push rod 11 remains stationary, and the rotating wheel 4 rotates clockwise, so that the gear teeth 41 drive the second locking member 3 to rotate counterclockwise, and the second rolling member 25 rotates from the locking state to the clockwise rotating state. The outer arc surface 33 on the second locking part 3 rolls to the transition arc surface 36 and finally stays at any position on the transition arc surface 36. At this time, the first torsion spring 12 is compressed by the first locking part 2, and the second torsion spring 13 Compressed by the second locking member 3, the rotating wheel 4 rotates clockwise without restriction.

In the above-mentioned locked state and unlocked state, the first rolling element 24 always remains in contact with the clutch push rod 11 . In the above-mentioned state of clockwise rotation of the rotating wheel 4, the first rolling element 24 is out of contact with the clutch push rod 11.

In any of the three states of the above-mentioned clutch mechanism, when the first locking member 2 vibrates due to severe vibration, the function it is to perform will not be affected. In the locked state, its reliability is related to the second locking piece 3 . Specifically, during the vibration process, the first locking member 2 may be caused to rotate slightly clockwise (the limit of the clutch push rod 11 will not allow the first locking member 2 to rotate counterclockwise), which may cause the second rolling member to rotate counterclockwise. 25 may move to the left along the surface of the second locking member 3, but the arc state of the inner arc surface 34 determines that the second rolling member 25 will not affect the posture of the second locking member 3 during slight movements, and the second rolling member 25 Part 25 can quickly return to the correct position from dislocation.

In the unlocked state, due to the influence of the outer arc surface 33, even if the second rolling element 25 slightly rotates counterclockwise, it will not cause the second locking lever to rotate significantly clockwise and affect the gear teeth of the rotating wheel 4. 41 works, the second rolling member 25 can quickly return to the correct position after the vibration weakens.

When the rotating wheel 4 rotates clockwise, because the second locking lever is driven by the gear teeth 41 of the rotating wheel 4 , the slight movement of the second rolling element 25 will obviously not affect the posture of the second locking element 3 .

The present application provides a gearbox, including a novel transmission clutch mechanism as any one of the above.

The gearbox is provided with a gear train mechanism, and the gear train mechanism is connected to the rotating wheel 4 . When the counterclockwise rotation of the rotating wheel 4 is not restricted (i.e., the unlocked state), the rotating wheel 4 rotates together with the gear train mechanism. At this time, the power transmission path of the power train does not change, and the transmission ratio is.

When changing from the unlocked state to the rotating state, when the rotating wheel 4 rotates together with the gear train mechanism, the gear teeth 41 on the surface of the rotating wheel 4 are engaged with the pawl 35 of the second locking lever, and the counterclockwise rotation of the rotating wheel 4 is affected by Restricted, unable to rotate, because the rotating wheel 4 is restricted, and the gear train mechanism needs to continue to rotate, so the power transmission path inside the gear train mechanism changes, which in turn causes the transmission ratio to change, and the gear shifting operation cannot be realized.

When the gearbox is shifting gears, the first locking member 2 is an arcuate geometric structure part, which can withstand high-speed impact, can complete shifting when there is a large load on the rotating wheel 4, is not easily damaged, and improves shifting efficiency. Secondly, when unlocking, the first locking member 2 can be driven by a smaller driving force and is not affected by the engagement force between the second locking member 3 and the rotating wheel 4, so the unlocking force is small. Furthermore, through the close cooperation between the components and the shape characteristics of the components, when the clutch mechanism is in any working state, the first locking component 2 will not affect its function due to severe vibration, and the vibration resistance is relatively high. good.

It should be understood that those skilled in the art can make improvements or changes based on the above description, and all these improvements and changes should fall within the protection scope of the appended claims of the present invention.

Claims (10)

A new type of transmission clutch mechanism, characterized by: including: a triggering member for triggering the clutch mechanism to start locking and unlocking actions, a first locking piece and a second locking piece for executing the locking and unlocking actions, and a rotating wheel ; The cross-sectional shape of the first locking member is an arcuate structure; when shifting gears, driven by the triggering member, the first locking member moves toward the inner contour along the outer contour of the second locking member, And when reaching the inner contour, the second locking piece is made to conflict with the rotating wheel to achieve locking of the clutch mechanism. The novel transmission clutch mechanism according to claim 1, wherein the first locking member includes a first fixed hinge support, a first contact arm and a second contact arm arranged on the first fixed hinge support. Arm; the first contact arm protrudes toward one end, and the second contact arm curves and protrudes toward the side opposite to the protruding direction of the first contact arm. The novel transmission clutch mechanism according to claim 2, wherein the first contact arm is provided with a first rolling element, and the second contact arm is provided with a second rolling element. The novel transmission clutch mechanism according to claim 3, wherein the second locking member includes a second fixed hinge support, an arc block and a pawl arranged on the second fixed hinge support; The arc block protrudes to one side; the detent protrudes to the side opposite to the protruding direction of the arc block. The novel transmission clutch mechanism according to claim 4, characterized in that the surface of the second fixed hinge support is provided with an inner arc surface; and the arc block is provided with an outer arc surface connected with the inner arc surface. ; When shifting gears, the second roller rolls along the outer arc surface to the inner arc surface. The new transmission clutch mechanism according to claim 5, characterized in that the second fixed hinge support is also provided with a transition arc surface connected with the inner arc surface; the inner arc surface is located on the outer surface. between the arc surface and the transition arc surface. The new transmission clutch mechanism according to claim 4, characterized in that the rotating wheel is provided with a third fixed hinge support; the surface of the rotating wheel is provided with a joint for engaging and connecting with the pawl when shifting gears. gear teeth. The novel transmission clutch mechanism according to claim 3, characterized in that the triggering member includes an active triggering unit; the active triggering unit is a clutch pushrod; when the clutch mechanism is locked and unlocked, the clutch pushrod and the The first roller contacts. The novel transmission clutch mechanism according to claim 4, wherein the triggering member further includes a passive triggering unit; the passive triggering unit includes a first torsion spring and a second torsion spring; the end of the first torsion spring Connected or contacted with the second contact arm; the end of the second torsion spring is connected or contacted with the arc block. A gearbox, characterized by including the novel transmission clutch mechanism according to any one of claims 1-9.

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