Classifications

• • E—FIXED CONSTRUCTIONS
  • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
  • E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
  • E01C19/00—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving
  • E01C19/48—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving for laying-down the materials and consolidating them, or finishing the surface, e.g. slip forms therefor, forming kerbs or gutters in a continuous operation in situ
  • E01C19/4833—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving for laying-down the materials and consolidating them, or finishing the surface, e.g. slip forms therefor, forming kerbs or gutters in a continuous operation in situ with tamping or vibrating means for consolidating or finishing, e.g. immersed vibrators, with or without non-vibratory or non-percussive pressing or smoothing means

Definitions

• the invention relates to the field of construction machinery, in particular to a screed compacting beam, a screed and a paver. Background technique
• the paver is a kind of construction machinery that spreads the mixed mix of different grades, slams and compacts, and is an indispensable key equipment for building highways and high-grade roads.
• the role of pavers in pavement construction has become increasingly important.
• the screed is the key operating device of the paver, which plays an important role in road compactness and flatness.
• the screed compaction beam is a screed device with a higher tamping frequency than the paver vibrator. Its main function is to generate high-frequency vertical reciprocating motion, preliminary tamping and screeding through the vibrator.
• the pavement after the floor is ironed has the effect of secondary compaction and road surface repair to improve the smoothness and compactness of the paved pavement.
• the screed compacting beam is usually hydraulically driven, and its high-speed pulse cylinder is used to achieve its vertical reciprocating motion.
• the disadvantages of such a screed compacting beam are:
• the hydraulic drive has strict technical requirements on manufacturing precision and sealing conditions, thereby causing high equipment cost and difficulty in maintenance after the drive device is damaged. Summary of the invention
• the present invention proposes a screed compacting beam, screed and paver to solve the problem of high cost and difficult maintenance of the existing screed compacting beam.
• the present invention provides a screed compacting beam for use in a paver comprising: a drive shaft coupled to a drive motor of the paver:
• a cam the cam is sleeved on the drive shaft and coaxially coupled with the drive shaft; a transmission rod, an upper end of the transmission rod is in contact with the outer peripheral wall of the cam, and a lower end is provided with a blade;
• a transmission rod reset mechanism configured to press the upper end of the transmission rod against the cam.
• the cam has a plurality of bosses, and the bosses are evenly distributed along the circumference of the cam.
• the upper end of the transmission rod is provided with a transmission rod roller, and the transmission rod roller is in rolling engagement with the cam.
• the method further includes: a limiting mechanism for moving the transmission rod in a vertical direction;
• the limiting mechanism comprises: a limiting plate, the limiting plate is fixedly connected with the screed frame of the paver,
• the limiting plate is provided with a transmission rod limiting hole, and the inner wall of the transmission rod limiting hole is provided with a transmission rod sliding sleeve, and the transmission rod runs through the transmission rod sliding sleeve.
• the transmission rod resetting mechanism includes: a vibration plate, a return spring, a return spring guide rod and a connecting rod;
• the upper end of the connecting rod is connected to the vibrating plate by a first fastener, and the lower end thereof is fixedly connected with the blade;
• the vibration plate is provided with a transmission rod through hole and a guide rod through hole; the transmission penetrates the transmission rod through hole; the upper end of the return spring guide rod penetrates the guide rod through hole, and passes through the second fastener Connected to the limiting plate, the lower end of the return spring guiding rod is provided with a return spring limiting portion; the return spring is sleeved on the return spring guiding rod, and is located at the vibrating plate and the Between the return spring limiters.
• an inner wall of the guide rod through hole is provided with a guide rod sliding sleeve.
• the return spring limiting portion includes: a nut and a backing plate, the nut is screwed to a lower end of the return spring guiding rod, and the backing plate is located above the nut.
• the transmission rod includes: a first transmission rod and a second transmission rod; an upper end of the first transmission rod is in contact with the cam through the transmission rod through hole and the transmission rod sliding sleeve, The lower end is detachably connected to the upper end of the second transmission rod; the lower end of the second transmission rod is fixedly connected to the blade.
• the invention also provides a screed for use in a paver provided with the screed compacting beam described above.
• the present invention also provides a paver provided with the above screed.
• the invention provides a screed compacting beam comprising a drive shaft, a cam and a transmission rod, the drive shaft can drive the cam to rotate, and the cam and the transmission rod are in contact connection.
• the screed compacting beam provided by the invention utilizes the convex steering steering rod during the rotation of the cam, squeezes the transmission rod, drives the blade to move downward, and the convex portion rotates away from the transmission rod, the transmission rod is reset, and the blade is moved upward. , generating a vibration pulse to realize the reciprocating motion of the screed compacting beam.
• the screed compacting beam structure provided by the invention is relatively simple, so that the cost is low on the one hand, and the other side is convenient to disassemble, which facilitates the later maintenance of the equipment.
• FIG. 1 is a schematic structural view of a screed compacting beam according to Embodiment 1 of the present invention
• Figure 2 is a partial enlarged view of Figure 1;
• FIG. 3 is a schematic structural view of a screed compacting beam according to Embodiment 2 of the present invention.
• FIG. 4 is a schematic structural view of a screed compacting beam according to Embodiment 3 of the present invention.
• Figure 5 is a partial enlarged view of Figure 4.
• FIG. 6 is a schematic structural view of a screed according to Embodiment 4 of the present invention.
• Figure 7 is a schematic structural view of a paver according to Embodiment 5 of the present invention.
• FIG. 1 and 2 show the structure of a screed compacting beam according to Embodiment 1 of the present invention.
• the screed compacting beam is used in a paver comprising:
• a drive shaft 1 the drive shaft 1 being connected to a drive motor of the paver;
• a cam 2 is provided with a boss portion 21 and sleeved on the drive shaft 1 and coaxially coupled with the drive shaft 1;
• the transmission rod 3, the upper end of the transmission rod 3 is in contact with the outer peripheral wall of the cam 2, and the lower end of the transmission rod 3 is fixedly connected with the blade 6, that is, the blade 6 is disposed at the lower end of the transmission rod 3;
• a limiting mechanism for moving the transmission rod 3 in a vertical direction comprises: a limiting plate 4, the limiting plate 4 is fixedly connected with the screed rack 7 of the paver, and the limiting plate 4 is provided with a transmission rod limit Position hole, the inner wall of the transmission rod limit hole is provided with a transmission rod sliding sleeve 401, and the transmission rod 3 extends through the transmission rod sliding sleeve 401;
• a transmission rod reset mechanism 5 for pressing the upper end of the transmission rod 3 against the cam 2, comprising a vibration plate 51, a return spring 52, a return spring guide rod 53 and a connecting rod 54; the upper end of the connecting rod 54 passes the first fastener It is connected to the vibration plate 51, and its lower end is fixedly connected with the blade 6; the vibration plate 51 is provided with a transmission rod through hole and a guide rod through hole, and the transmission rod 3 penetrates the transmission rod through hole; the upper end of the return spring guide rod 53 penetrates the guide rod through hole And the second fastener is connected to the limiting plate 4, and the lower end thereof is provided with a return spring limiting portion 9; the return spring 52 is sleeved on the return spring guiding rod 53, and is located at the vibration plate 51 and the return spring limit portion Between 9.
• the driving motor runs to drive the driving shaft 1 to rotate, and the driving shaft 1 rotates to drive the cam 2 to rotate; when the convex portion 21 of the cam 2 rotates to contact with the transmission rod 3, the transmission rod 3 is pressed at the convex portion 21 of the cam 2.
• the transmission rod 3 pushes the blade 6 downward, the blade 6 drives the vibration plate downward through the connecting rod 54, and the return spring 52 is pressed; when the convex portion 21 of the cam 2 rotates away from the transmission
• the return spring 52 is reset, and the vibrating plate 51 is bounced upward to drive the connecting rod 54, the blade 6 and the transmission rod 3 to move upward;
• the drive shaft 1 is rotated one revolution (the cam 2 is rotated one revolution) and the screed compacting beam completes the primary speed device to adjust the vibration frequency of the screed compacting beam.
• the function of the cam 2 in the screed compacting beam provided by the embodiment is as follows: the driving rod 3 is pressed downward by the convex portion 21, and the transmission rod 3 is fixedly connected with the blade 6, thereby realizing the orientation of the blade 6. Under exercise.
• the drive rod 3 can be welded or screwed to the blade 6.
• the transmission rod 3 preferably includes a first transmission rod 31 and a second transmission rod 32, the upper end of the first transmission rod 31 passing through the transmission rod through hole and the transmission
• the rod sliding sleeve 401 is in contact with the cam 2, and the lower end thereof is detachably connected to the upper end of the second transmission rod 32; the lower end of the second transmission rod 32 is fixedly coupled to the blade 6.
• the first transmission rod 31 and the second transmission rod 32 may be screwed, and the second transmission rod 32 and the blade 6 may be welded or screwed.
• the driving shaft 1 functions to drive the cam 2 to rotate.
• the screed compacting beam preferably further includes: a bearing housing 8 mounted on the screed frame 7 for piercing Drive shaft 1.
• the blade 6 of the screed compacting beam is generally long, and is prone to yaw during the movement.
• the function of the above-mentioned limiting mechanism is to move the transmission rod 3 in the vertical direction to prevent the transmission rod 3 from displacing the blade 6.
• the limiting mechanism provided in this embodiment is a limiting plate 4 provided with a sliding sleeve 401 of the transmission rod, which guides the movement of the transmission rod 3 and reduces the frictional force of the transmission rod 3 when moving in the axial direction.
• the transmission rod sliding sleeve 401 is in clearance fit with the transmission rod 3.
• the function of the transmission rod resetting mechanism 5 is to press the upper end of the transmission rod 3 against the cam 2, thereby causing the transmission rod 3 to move upward when the projection portion 21 is turned away from the transmission rod 3, thereby achieving upward movement of the blade 6.
• the transmission rod reset mechanism 5 includes a vibration plate 51, a return spring 52, a return spring guide rod 53, and a connecting rod 54. Wherein, the vibrating plate 51 and the connecting rod 54 and the connecting rod 3 are relatively fixed in position. When the driving rod 3 moves downward, the connecting rod 54 drives the vibrating plate 51 to move downward for compressing the return spring 52 to move the transmission rod 3 downward.
• the return spring 52 is kept in a compressed state; the return spring 52 is used to provide a restoring force to bounce the vibrating plate 51 to move the blade 6 upward; and the return spring guide rod 53 serves as a guide and limit for the return spring 52.
• the return spring limiting portion 9 includes: a nut and a backing plate, the nut is screwed to the lower end of the return spring guiding rod 53, and the backing plate is located above the nut.
• the return spring guiding rod 53 may be a bolt, and the nut of the head and the pad above the nut form a return spring limiting portion.
• the first fastener and the second fastener in the transmission rod reset mechanism 5 may be components well known to those skilled in the art, such as nuts, bolts, rivets, and the like.
• the vibrating plate 51 reciprocates up and down.
• the inner wall of the guide rod through hole is preferably provided with a guide rod sliding sleeve, and the guide rod sliding shaft The sleeve is clearance-fitted with the return spring guide rod 53 to reduce the friction of the guide rod 53 and prolong the service life of the return spring guide rod 53.
• the screed compacting beam provided by the embodiment is in the process of using the cam to rotate: the bulge steering transmission rod ⁇ the squeezing transmission rod ⁇ driving the blade downward movement, and the convex portion turning away from the transmission rod ⁇ transmission The rod is reset ⁇ the blade is moved upward, thereby generating a vibration pulse to realize the reciprocating motion of the screed compacting beam.
• the screed compacting beam structure provided in this embodiment is relatively simple, so that the cost is low on the one hand, and the disassembly is convenient on the other hand, which facilitates the later maintenance of the equipment.
• Fig. 3 shows the structure of a screed compacting beam of Embodiment 2 of the present invention.
• the difference between the screed compacting beam provided in this embodiment and the embodiment 1 is:
• the number of the projections 21 of the cam 2 is plural (six in the present embodiment), and the projections 21 are evenly distributed along the circumferential direction of the cam 2.
• the advantage of adding the raised portion 21 is that: the cam 2 is rotated one turn, and multiple press-reduction of the transmission rod can be realized, and the blade is driven to reciprocate a plurality of times. Therefore, the cam 2 provided with the plurality of bosses 21 has the function of accelerating the vibration frequency, so that a lower vibration speed of the drive shaft can obtain a higher vibration frequency, saving energy consumption; those skilled in the art can also adjust the cam convex The number of the starting parts is used to adjust the vibration frequency of the screed compacting beam.
• the advantage of providing the convex portion 21 uniformly distributed along the circumferential direction of the cam 2 is to increase the stability of the vibration frequency of the screed compacting beam.
• the adjacent convex portions of the cam are smoothly transitioned through the circular arc surface to reduce the friction between the cam and the transmission rod, and prolong the service life of the cam and the transmission rod.
• the structure of the screed compacting beam of Embodiment 3 of the present invention is shown in Figs.
• the difference between the screed compacting beam provided in this embodiment and the second embodiment is:
• the upper end of the transmission rod 3 is provided with a transmission rod roller 301, and the rotation rod roller 301 is in rolling engagement with the cam 2.
• the drive rod roller 301 also rotates, thereby reducing the friction experienced by the cam and prolonging the service life of the cam.
• the upper end of the transmission rod can also be set as a circular arc surface, which also reduces the friction of the cam and prolongs the service life of the equipment.
• the number of the cams is one, and the number of the corresponding transmission rods is also one.
• the number of cams and transmission rods can also be multiple. It only needs to ensure that the cams have the same shape and can be overlapped along the axis of the rotating shaft to ensure the amplitude and frequency of the movement of each transmission rod are consistent, without affecting the blade. Reciprocating up and down.
• the number of the connecting rod, the return spring and the return spring guiding rod in the transmission rod resetting mechanism are both two. In order to optimize the reset effect of the transmission rod, the number of the above components is also greater than 2.
• limiting mechanism may also adopt other forms well known to those skilled in the art, such as using a limiting shaft, a limiting block and the like.
• transmission rod reset mechanism can also take other forms well known to those skilled in the art.
• Embodiment 4 of the present invention also provides a screed for use in a paver, and Fig. 6 shows a screed press structure of the present embodiment, the screed being provided with the screed compacting beam 10 described above.
• the screed has a screed compacting beam structure, which has the advantages of low cost, convenient disassembly, and easy maintenance.
• Embodiment 5 of the present invention also provides a paver, and Fig. 7 shows the structure of the paver of the present embodiment, which is provided with the above screed 11.
• the screed compacting beam structure of the paver has a low cost and is convenient to be dismantled. Unloading, easy to repair.
• the invention provides a screed compacting beam comprising a drive shaft, a cam, a transmission rod, a transmission rod resetting mechanism and a blade.
• the drive shaft can drive the cam to rotate, and the cam and the transmission rod are in contact connection.
• the screed compacting beam provided by the invention utilizes the convex steering steering rod during the rotation of the cam, squeezes the transmission rod, drives the downward movement of the blade, and turns the convex portion away from the transmission rod, under the action of the transmission rod reset mechanism The transmission rod is reset, and the blade is moved upward to generate a vibration pulse to realize the reciprocating motion of the screed compacting beam.
• the screed plate compacting beam structure provided by the invention is relatively simple, so that the cost is low on the one hand, and the disassembly is convenient on the other hand, which facilitates the later maintenance of the equipment. Therefore, the present invention has industrial applicability.

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• Engineering & Computer Science (AREA)
• Architecture (AREA)
• Civil Engineering (AREA)
• Structural Engineering (AREA)
• Road Paving Machines (AREA)

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Publications (1)

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Cited By (2)

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Citations (7)

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• 2012
  • 2012-05-29 CN CN201210171839.2A patent/CN102808369B/zh not_active Expired - Fee Related
  • 2012-12-06 WO PCT/CN2012/086046 patent/WO2013177915A1/fr not_active Ceased

Patent Citations (7)

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