CN217462979U - Disc brake - Google Patents

Abstract

The utility model relates to a tractor accessory, and discloses a disc brake, wherein a spline shaft (6) is arranged at the end part of a brake shaft (5) positioned in an accommodating cavity (3), a first brake panel (7) is arranged on the covering surface of a brake cover (2), and a second brake panel (8) is arranged at the bottom of the accommodating cavity (3); two parallel friction plates (9) are arranged in the containing cavity (3), and a spline groove (10) for the insertion fit of the spline shaft (6) penetrates through the centers of the two friction plates (9); still be provided with drive arrangement (11) in appearance chamber (3) so that two friction discs (9) along the axial of integral key shaft (6) respectively to support and press in first brake panel (7) and second brake panel (8), the utility model discloses a disc brake when needs braking, pushes away two friction discs (9) to both sides along the axial of integral key shaft (6) through drive arrangement (11) to support respectively and press first brake panel (7) and second brake panel (8) to both sides, in order to utilize frictional force to make friction disc (9) and integral key shaft (6) synchronous deceleration, thereby make coaxial coupling's brake axle (5) deceleration, and then reach the braking purpose.

Description

Disc brake

Technical Field

The utility model relates to a tractor accessory especially relates to disc brake.

Background

A tractor is a self-propelled power machine used for towing and driving a working machine to complete various mobile operations. The system or the device comprises an engine, a transmission system, a walking system, a steering system, a hydraulic suspension system, a power output system, an electric instrument system, a driving control system, a traction system and the like. The power of the engine is transmitted to the driving wheel by the transmission system, so that the tractor runs, and in real life, a rubber belt is commonly used as a medium for power transmission. Tractors classified into agricultural, industrial and special uses according to function and use; the tractor is divided into a wheel type tractor, a crawler type tractor, a boat-shaped tractor, a self-propelled chassis and the like according to the structure type. The braking system is especially important as a deceleration or sudden stop device in the running process of the tractor. Shoe (drum) brakes are widely used on tractors as a common braking device. A similar shoe brake is disclosed in utility model publication CN 202500923U.

However, the conventional shoe (drum) brake refers to a brake in which a brake shoe is fixed to a disc on a shaft by a brake pad operating device. The specific principle is as follows:

(1) the left and right brake friction plates are fixed by a return spring and then are arranged on a brake shoe, the brake shoe is sleeved on a brake drum, and a spline is arranged in the brake drum and is connected with a power shaft; the brake cover is respectively provided with a pin shaft and a cam shaft in the upper and lower mounting holes and enters the corresponding mounting holes of the brake shoes, wherein the outside of the cam shaft is connected with the brake control mechanism.

(2) When braking is needed, the cam shaft is forced to rotate through the external braking mechanism, and the brake shoe is expanded and then rubbed with the brake drum to generate braking.

Although the friction area between the friction plate and the hub of the shoe (drum) brake is large, the friction coefficient is large, and the braking force ratio is strong, the heat dissipation is poor, and the friction effect of the friction plate is reduced or fails due to high temperature, so that the brake failure is caused. In addition, brake failure may be caused in the situation of wading deep or frequent braking on a long slope, and therefore, improvement is needed.

SUMMERY OF THE UTILITY MODEL

The utility model discloses to prior art's shortcoming, provide a disc brake, not only heat dispersion is good, can effectively reduce the brake performance decline that the thermal decay brought, has the water stability of preferred again, avoids arresting gear to wade the braking performance decline after the deepening.

In order to solve the technical problem, the utility model discloses a following technical scheme can solve:

a disc brake comprises a brake drum and a brake cover which are spliced with each other, wherein a containing cavity is formed in the brake drum, a shaft hole penetrates through the bottom of the containing cavity, a brake shaft is rotatably inserted in the shaft hole, one end of the brake shaft is positioned outside the brake drum, and the other end of the brake shaft is positioned in the containing cavity; a spline shaft is arranged at the end part of the brake shaft in the accommodating cavity, a first brake panel is arranged on the covering surface of the brake cover, and a second brake panel is arranged at the bottom of the accommodating cavity; two friction plates which are parallel to each other are arranged in the containing cavity, and a spline groove for the spline shaft to be in splicing fit is penetrated through the centers of the two friction plates; and a driving device is further arranged in the containing cavity so that the two friction plates respectively abut against the first brake panel and the second brake panel along the axial direction of the spline shaft.

By adopting the scheme, the spline shaft is matched with the spline groove in an inserted manner, so that the two friction plates can circumferentially rotate along with the spline shaft, and the friction plates can axially slide on the spline shaft. During normal operation, the spline shaft can synchronously rotate along with the brake shaft in the circumferential direction, and the friction plate on the spline shaft can rotate along with the spline shaft at the moment. When braking is needed, the two friction plates are pushed towards two sides along the axial direction of the spline shaft through the driving device and respectively abut against the first braking panel and the second braking panel on the two sides, so that the friction plates and the spline shaft are synchronously decelerated by utilizing friction force, the braking shafts which are coaxially connected are decelerated, and the braking purpose is achieved. Because the heat dissipation area of the friction plate is larger, the heat generated by braking can be more efficiently dissipated, so that the heat attenuation effect is reduced. Meanwhile, under the action of centrifugal force, the friction plate is easy to spin after being wetted, and the water stability during braking is improved.

Preferably, the driving device comprises a first nipper disc and a second nipper disc which are arranged between the two friction plates and are oppositely stacked, and a first through hole and a second through hole respectively penetrate through the centers of the first nipper disc and the second nipper disc so as to be respectively used for the spline shaft to rotatably insert; a plurality of first hemispherical grooves are circumferentially arranged on the end surface of the first nipper disc close to the second nipper disc, and a plurality of second hemispherical grooves which are one-to-one corresponding to the first hemispherical grooves are circumferentially arranged on the end surface of the second nipper disc close to the first nipper disc; a spherical support piece is clamped between the first hemispherical groove and the second hemispherical groove, the first hemispherical groove extends along the circumferential direction of the first caliper disc to form a first groove, the first groove is obliquely arranged towards the direction close to the second caliper disc, the second hemispherical groove extends along the circumferential direction of the second caliper disc to form a second groove, the second groove is obliquely arranged towards the direction close to the first caliper disc, and the first groove and the second groove are oppositely arranged; an elastic reset assembly is arranged between the inner walls of the first through hole and the second through hole so that the relative rotation position of the first nipper disc and the second nipper disc can be kept in a state that the first hemispherical groove and the second hemispherical groove are opposite; the first and second clamp discs are provided with operating components so as to enable the first and second clamp discs to generate relative rotation angles.

By adopting the scheme, when braking is needed, the first caliper disc and the second caliper disc rotate relatively by virtue of the control assembly, and as the spherical supporting pieces are arranged in the first hemispherical groove and the second hemispherical groove, the spherical supporting pieces can only move outwards along the first groove or the second groove, so that the first caliper disc and the second caliper disc are forced to expand outwards and are respectively pressed on the first friction plate and the second friction plate, and the first friction plate and the second friction plate are respectively pressed against the first brake panel and the second brake panel, so that braking is realized by utilizing contact friction. The unit pressure of the caliper disc on the friction plate is high, so that water is easily extruded out, and due to the wiping action of the caliper disc on the friction plate, the brake can be restored to be normal only after being braked for several times after water is discharged, and the water stability during braking is further improved.

Preferably, the elastic reset assembly comprises a plurality of first supporting blocks circumferentially arranged on the inner wall of the first perforation and a plurality of second supporting blocks circumferentially arranged on the inner wall of the second perforation, the number of the first supporting blocks is consistent with that of the second supporting blocks and is arranged oppositely, tension springs are arranged on two sides of each of the first supporting blocks and the second supporting blocks which are arranged oppositely, one ends of the tension springs are fixed on the inner wall of the first perforation, and the other ends of the tension springs are fixed on the inner wall of the second perforation.

By adopting the scheme, the two tension springs can generate elastic tension between the first caliper disc and the second caliper disc, and can be stretched after the first caliper disc and the second caliper disc rotate relatively under the action of the operating assembly; when the operation component releases the action, the first clamp plate and the second clamp plate can rotate and reset under the action of the elastic tension of the tension spring, and the operation component is more convenient and fast. First supporting shoe can separate two extension springs with the second supporting shoe for the elastic extension of extension spring is more high-efficient, further promotes the efficiency that resets of first vice dish and second vice dish.

Preferably, the control assembly comprises a first lug and a second lug which are respectively arranged on the peripheral surfaces of the first nipper disc and the second nipper disc, the first lug and the second lug are respectively positioned at positions close to the tops of the first nipper disc and the second nipper disc, and a gap is kept between the first lug and the second lug; the first support lug and the second support lug are respectively pivoted with a first connecting rod and a second connecting rod, the end part of the first connecting rod, which is far away from the first support lug, is pivoted with the end part of the second connecting rod, which is far away from the second support lug, the pivoting part of the first connecting rod and the second connecting rod is pivoted with a driving rod, and the inner side wall of the accommodating cavity is provided with a guide hole through which the driving rod penetrates through the outer part of the brake drum.

By adopting the scheme, the first connecting rod and the second connecting rod can generate pressure and tension. And the driving rod extends to the outside of the brake drum through the guide hole, so that the external mechanism can perform braking operation through the driving rod conveniently. When the driving rod is pressed or pulled along the length direction, the driving rod can drive the first connecting rod and the second connecting rod to be pressed downwards or pulled upwards so as to separate or approach the first support lug and the second support lug to two sides, so that the first caliper disc and the second caliper disc rotate relatively, and the first caliper disc and the second caliper disc are forced to expand oppositely along the axial direction of the spline shaft to achieve the braking purpose.

Preferably, a cover for covering the guide hole is provided outside the brake drum, and a guide hole through which the drive rod is slidably inserted is formed through a plate surface of the cover.

By adopting the scheme, the design of the sealing cover is more convenient for the brake to be assembled, and the guide hole can effectively limit the stroke change of the driving rod in the guide hole, so that the driving rod is more stable when acting.

Preferably, a plurality of limiting seats which are abutted to the outer peripheral surfaces of the first jaw disc and the second jaw disc are circumferentially arranged on the inner peripheral surface of the accommodating cavity.

By adopting the scheme, the limiting seat can effectively limit the first caliper disc, the second caliper disc and the two friction plates in the circular space, so that the first caliper disc, the second caliper disc and the two friction plates can perform stable circumferential rotation and axial movement in the accommodating cavity of the brake drum, the position deviation is not easy to occur, and the stability during braking is improved.

Preferably, the first brake panel is detachably connected with the brake cover, and the second brake panel is detachably connected with the bottom of the accommodating cavity; a first supporting sheet is fixedly attached to the end face, close to the brake cover, of the first brake panel, and a second supporting sheet is fixedly attached to the end face, close to the bottom of the accommodating cavity, of the second brake panel; two sides of the end surface of the first support sheet close to the brake cover are vertically extended with first threaded rods, and two sides of the end surface of the second support sheet close to the bottom of the cavity are vertically extended with second threaded rods; a first penetrating hole for two first threaded rods to penetrate through is formed in the plate surface of the brake cover, and a second penetrating hole for two second threaded rods to penetrate through is formed in the bottom of the accommodating cavity; the first threaded rod passes through the first through hole and then exceeds the end face of the brake cover, and the exceeding part of threads are screwed with a first nut; the second threaded rod passes through the second through hole and then exceeds the outer end face of the brake drum, and the exceeding part of threads is screwed with a second nut.

By adopting the scheme, the first brake panel and the second brake panel can be detached and replaced, and the service life of the brake is effectively prolonged.

The utility model discloses owing to adopted above technical scheme, have apparent technological effect: the insertion fit between the spline shaft and the spline groove can ensure that the two friction plates can circumferentially rotate along with the spline shaft and can also ensure that the friction plates can axially slide on the spline shaft. During normal operation, the spline shaft can synchronously rotate along with the brake shaft in the circumferential direction, and the friction plate on the spline shaft can rotate along with the spline shaft at the moment. When braking is needed, the two friction plates are pushed towards two sides along the axial direction of the spline shaft through the driving device and respectively abut against the first braking panel and the second braking panel on the two sides, so that the friction plates and the spline shaft are synchronously decelerated by utilizing friction force, the braking shafts which are coaxially connected are decelerated, and the braking purpose is achieved. Because the heat dissipation area of the friction plate is larger, the heat generated by braking can be more efficiently dissipated, so that the heat attenuation effect is reduced. Meanwhile, under the action of centrifugal force, the friction plate is easy to spin after being wetted, and the water stability during braking is improved.

Drawings

FIG. 1 is a schematic structural diagram of the first embodiment;

FIG. 2 is an exploded view of the first embodiment;

FIG. 3 is a schematic structural diagram of a brake cover according to one embodiment of the present invention;

FIG. 4 is a schematic structural diagram of a brake drum according to one embodiment of the present invention;

FIG. 5 is a first schematic structural diagram of a driving device according to a first embodiment of the present invention;

FIG. 6 is a second schematic structural diagram of a driving device according to the first embodiment;

FIG. 7 is an exploded view of a driving device according to one embodiment of the present invention;

FIG. 8 is a schematic structural diagram of a first vise disc in the first embodiment;

FIG. 9 is an exploded view of a brake drum according to one embodiment of the present invention;

FIG. 10 is an exploded view of a brake cover according to a second embodiment;

fig. 11 is an exploded view of the brake drum in the second embodiment.

The names of the parts indicated by the numerical references in the above figures are as follows: 1. a brake drum; 2. a brake cover; 3. a cavity; 4. a shaft hole; 5. a brake shaft; 6. a spline shaft; 7. a first brake panel; 8. a second brake panel; 9. a friction plate; 10. a spline groove; 11. a drive device; 12. a first nipper plate; 13. a second nipper plate; 14. a first perforation; 15. a second perforation; 16. a first hemispherical groove; 17. a second hemispherical groove; 18. a spherical support; 19. a first trench; 20. a second trench; 21. an elastic reset component; 22. a steering assembly; 23. a first support block; 24. a second support block; 25. a tension spring; 26. a first lug; 27. a second lug; 28. a first link; 29. a second link; 30. a drive rod; 31. a guide hole; 32. sealing the cover; 33. a guide hole; 34. a limiting seat; 35. a first support sheet; 36. a second support sheet; 37. a first threaded rod; 38. a second threaded rod; 39. a first through hole; 40. a second through hole; 41. a first nut; 42. a second nut; 43. a first hinge; 44. a second hinge; 45. a third hinge; 46. a threaded nail; 47. a dust cover; 48. a circular arc surface; 49. and a bearing.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples.

Example one

As shown in fig. 1 to 9, the disc brake disclosed in this embodiment includes a brake drum 1 and a brake cover 2 that are spliced together, and the brake cover 2 can be fixed to an end surface of the brake drum 1 by screws (not shown), so that the brake cover 2 can be easily attached and detached, and the stability of the brake cover 2 after being installed can be improved. A containing cavity 3 is formed in the brake drum 1, and the containing cavity 3 is preferably cylindrical. The bottom that holds chamber 3 runs through has the coaxial shaft hole 4 that sets up, and the internal rotation in shaft hole 4 is pegged graft and is had braking axle 5, for stability and the smooth and easy nature of guaranteeing when braking axle 5 is rotatory in shaft hole 4, is provided with bearing 49 between the inner wall in shaft hole 4 and the outer wall of braking axle 5. One end of the brake shaft 5 is located outside the brake drum 1 and connected to an external transmission mechanism (not shown), and the other end is located in the housing 3. The brake shaft 5 is located the coaxial integral key shaft 6 that is provided with of tip that holds the chamber 3, and the face that closes of stopper lid 2 is provided with first brake panel 7, and the bottom that holds the chamber 3 is provided with second brake panel 8, and first brake panel 7 is the ring form with second brake panel 8, and the interior circle between them can supply the integral key shaft 6 to rotate to wear to establish. Two friction plates 9 which are parallel to each other are arranged in the cavity 3, and spline grooves 10 for the spline shaft 6 to be inserted and matched penetrate through the centers of the two friction plates 9, so that the two friction plates 9 can synchronously rotate circumferentially along with the spline shaft 6 and move axially on the spline shaft 6. The cavity 3 is further provided with a driving device 11 so that the two friction plates 9 respectively abut against the first brake panel 7 and the second brake panel 8 along the axial direction of the spline shaft 6. In this embodiment, the driving device 11 includes a first clamping disk 12 and a second clamping disk 13 which are disposed between two friction plates 9 and are stacked oppositely, the first clamping disk 12 and the second clamping disk 13 are both in a disk shape, and the outer diameters of the two clamping disks are identical to the outer diameter of the friction plate 9. The inner peripheral surface of the cavity 3 is circumferentially provided with a plurality of limiting seats 34 abutting against the outer peripheral surfaces of the first caliper disc 12 and the second caliper disc 13, the number of the limiting seats 34 is preferably three, the three limiting seats 34 are circumferentially arranged on the inner side wall of the cavity 3 at equal intervals, the side wall of each limiting seat 34 is provided with an arc surface 48, the diameter corresponding to the arc surface 48 is consistent with the diameters of the friction plate 9, the first caliper disc 12 and the second caliper disc 13, so that the friction plate 9, the first caliper disc 12 and the second caliper disc 13 can be coaxially arranged, and the three can perform stable circumferential rotation and axial movement in the cavity 3. A first through hole 14 and a second through hole 15 respectively penetrate through the centers of the first caliper disc 12 and the second caliper disc 13 so as to respectively allow the spline shaft 6 to be rotatably inserted; a plurality of first hemispherical grooves 16 are circumferentially arranged on the end surface of the first caliper disc 12 close to the second caliper disc 13, and a plurality of second hemispherical grooves 17 corresponding to the first hemispherical grooves 16 one by one are circumferentially arranged on the end surface of the second caliper disc 13 close to the first caliper disc 12, in this embodiment, three first hemispherical grooves 16 and three second hemispherical grooves 17 are provided. A spherical support 18 is clamped between each set of the first semispherical slot 16 and the second semispherical slot 17, and the spherical support 18 is preferably a steel ball. The first hemispherical groove 16 extends along the circumferential direction of the first caliper disc 12 to form a first groove 19, the first groove 19 is inclined toward the second caliper disc 13, the second hemispherical groove 17 extends along the circumferential direction of the second caliper disc 13 to form a second groove 20, the second groove 20 is inclined toward the first caliper disc 12, and the first groove 19 is opposite to the second groove 20. An elastic reset component 21 is arranged between the inner walls of the first through hole 14 and the second through hole 15 so that the relative rotation position of the first clamping disk 12 and the second clamping disk 13 can be kept in a state that the first hemispherical groove 16 and the second hemispherical groove 17 are opposite, the elastic reset component 21 comprises a plurality of first supporting blocks 23 circumferentially arranged on the inner wall of the first through hole 14 and a plurality of second supporting blocks 24 circumferentially arranged on the inner wall of the second through hole 15, the number of the first supporting blocks 23 is the same as that of the second supporting blocks 24 and is opposite to that of the second supporting blocks 24, in this embodiment, the number of the first supporting blocks 23 and the number of the second supporting blocks 24 are preferably three. The two sides of the first supporting block 23 and the second supporting block 24 which are oppositely arranged are both provided with a tension spring 25, one end of the tension spring 25 is fixed on the inner wall of the first through hole 14, and the other end of the tension spring 25 is fixed on the inner wall of the second through hole 15. In this embodiment, two ends of the tension spring 25 can be fixed to the inner walls of the first through hole 14 and the second through hole 15 by welding or by a hook (not shown), which belongs to the common general knowledge in the art and is not described herein again. The first and second nipper discs 12 and 13 are provided with an operating assembly 22 to make the first and second nipper discs 12 and 13 rotate relatively. In this embodiment, the manipulating assembly 22 includes a first lug 26 and a second lug 27 respectively disposed on the outer peripheral surfaces of the first and second discs 12 and 13, and the first lug 26 and the second lug 27 are respectively located at positions close to the tops of the first and second discs 12 and 13 with a space therebetween. The first lug 26 and the second lug 27 are respectively pivoted with a first connecting rod 28 and a second connecting rod 29 through a first hinge 43 and a second hinge 44, the end part of the first connecting rod 28 far away from the first lug 26 is pivoted with the end part of the second connecting rod 29 far away from the second lug 27 through a third hinge 45, the pivoting part of the first connecting rod 28 and the second connecting rod 29 is pivoted with a driving rod 30 through the third hinge 45, and a guide hole 31 is penetrated through the inner side wall of the cavity 3 for the driving rod 30 to penetrate through the outside of the brake drum 1. More specifically, the brake drum 1 is provided with a cover 32 covering the guide hole 31, and both ends of the cover 32 are fixed to ports of the guide hole 31 by screw nails 46. The plate surface of the sealing cover 32 is penetrated with a guide hole 33 for the driving rod 30 to slide through, and the joint of the guide hole 33 and the driving rod 30 is provided with a dust cover 47.

The specific using process is as follows:

when a transmission mechanism (not shown) externally connected with the brake normally operates, the spline shaft 6 can synchronously rotate along with the brake shaft 5 in the circumferential direction, and at the moment, the friction plate 9 on the spline shaft 6 can rotate along with the spline shaft 6. When braking is required, the driving rod 30 is pushed down or pulled up, so that the driving rod drives the first connecting rod 28 and the second connecting rod 29 to be pushed down or pulled up, so as to separate or approach the first lug 26 and the second lug 27 to two sides, thereby enabling the first jaw plate 12 and the second jaw plate 13 to rotate relatively, because the spherical supporting pieces 18 are arranged in the first hemispherical groove 16 and the second hemispherical groove 17, the spherical supporting pieces 18 can only move outwards along the first groove 19 or the second groove 20, so that the first clamping disk 12 and the second clamping disk 13 are forced to expand outwards and are respectively tightly pressed on the two friction plates 9, so that the two friction plates 9 are pushed towards two sides along the axial direction of the spline shaft 6 and respectively abut against the first braking panel 7 and the second braking panel 8 at two sides, the friction plate 9 and the spline shaft 6 are synchronously decelerated by utilizing the friction force, so that the brake shaft 5 which is coaxially connected is decelerated, and the braking purpose is further achieved. Meanwhile, the two tension springs 25 can generate elastic tension between the first caliper disc 12 and the second caliper disc 13, and when the first caliper disc 12 and the second caliper disc 13 rotate relatively under the action of the operating assembly 22, the tension springs 25 can be stretched; when the operation assembly 22 is deactivated, the first and second vise discs 12 and 13 can rotate and reset under the action of the elastic tension of the tension spring 25, which is more convenient.

Example two

As shown in fig. 10 and 11, on the basis of the first embodiment, the first braking panel 7 is detachably connected to the brake cover 2, and the second braking panel 8 is detachably connected to the bottom of the cavity 3. Specifically, a first supporting sheet 35 is attached and fixed to an end face of the first braking panel 7 close to the brake cover 2, a second supporting sheet 36 is attached and fixed to an end face of the second braking panel 8 close to the bottom of the cavity 3, and the first supporting sheet 35 and the second supporting sheet 36 are preferably made of stainless steel. The first brake panel 7 and the second brake panel 8 may be fixed to the plate surfaces of the first support sheet 35 and the second support sheet 36 by welding. A first threaded rod 37 vertically extends from both sides of the end surface of the first supporting sheet 35 close to the brake cover 2, and a second threaded rod 38 vertically extends from both sides of the end surface of the second supporting sheet 36 close to the bottom of the cavity 3; a first through hole 39 for two first threaded rods 37 to penetrate through is arranged on the plate surface of the brake cover 2, and a second through hole 40 for two second threaded rods 38 to penetrate through is arranged at the bottom of the cavity 3; the first threaded rod 37 passes through the first through hole 39 and then exceeds the end surface of the brake cover 2, and a first nut 41 is screwed to the exceeding part of the thread, so as to lock the first support piece 35 and the first brake panel 7 to the brake cover 2. The second threaded rod 38 passes through the second through hole 40 and then exceeds the outer end surface of the brake drum 1, and a second nut 42 is screwed to the exceeding part of the thread, so as to lock the second support sheet 36 and the second brake panel 8 at the bottom of the cavity 3 of the brake drum 1.

The specific using process is as follows:

when the first brake panel 7 is worn, the brake cover 2 is detached from the brake drum 1, so that the cavity 3 in the brake drum 1 is exposed. Then, the first nuts 41 on the first threaded rods 37 are unscrewed to unlock the first supporting pieces 35 and the first brake panel 7 on the brake cover 2, so that the first supporting pieces 35 and the first brake panel 7 are detached from the brake cover 2, and then a new first brake panel 7 is replaced, during installation, the two first threaded rods 37 on the first supporting pieces 35 are respectively inserted into the two first through holes 39 on the brake cover 2, and then the two first nuts 41 are screwed onto the two first threaded rods 37 again, so that the first supporting pieces 35 and the first brake panel 7 are locked on the covering surface of the brake cover 2, and thus the installation of the first brake panel 7 is completed.

After the second brake panel 8 is worn, on the premise of opening the brake cover 2, the second nuts 42 on the second threaded rods 38 are firstly screwed down to unlock the second support sheet 36 and the second brake panel 8 on the brake drum 1, so that the second support sheet 36 and the second brake panel 8 are dismounted from the bottom of the accommodating cavity 3 of the brake drum 1, and then a new second brake panel 8 is replaced, during the installation process, the two second threaded rods 38 on the second support sheet 36 are respectively inserted into the two second through holes 40 on the brake drum 1, and then the two second nuts 42 are screwed onto the two second threaded rods 38 again to lock the second support sheet 36 and the second brake panel 8 on the bottom of the accommodating cavity 3 of the brake drum 1, so that the installation of the second brake panel 8 is completed.

Claims (7)

1. A disc brake comprising a brake drum (1) and a brake cover (2) which are spliced to each other, characterized in that: the brake drum is characterized in that an accommodating cavity (3) is formed in the brake drum (1), a shaft hole (4) penetrates through the bottom of the accommodating cavity (3), a brake shaft (5) is rotatably inserted in the shaft hole (4), one end of the brake shaft (5) is located outside the brake drum (1), and the other end of the brake shaft is located in the accommodating cavity (3); a spline shaft (6) is arranged at the end part of the brake shaft (5) positioned in the accommodating cavity (3), a first brake panel (7) is arranged on the covering surface of the brake cover (2), and a second brake panel (8) is arranged at the bottom of the accommodating cavity (3); two friction plates (9) which are parallel to each other are arranged in the containing cavity (3), and a spline groove (10) for the spline shaft (6) to be in splicing fit is arranged in the center of each friction plate (9) in a penetrating way; a driving device (11) is further arranged in the containing cavity (3) so that the two friction plates (9) respectively abut against the first brake panel (7) and the second brake panel (8) along the axial direction of the spline shaft (6).

2. The disc brake of claim 1, wherein: the driving device (11) comprises a first clamping disk (12) and a second clamping disk (13) which are arranged between the two friction plates (9) and are oppositely stacked, and a first through hole (14) and a second through hole (15) are respectively penetrated through the centers of the first clamping disk (12) and the second clamping disk (13) to respectively allow the spline shaft (6) to be rotatably inserted; a plurality of first hemispherical grooves (16) are circumferentially arranged on the end surface, close to the second nipper (13), of the first nipper (12), and a plurality of second hemispherical grooves (17) which are one-to-one corresponding to the first hemispherical grooves (16) are circumferentially arranged on the end surface, close to the first nipper (12), of the second nipper (13); a spherical support piece (18) is clamped between the first hemispherical groove (16) and the second hemispherical groove (17), a first groove (19) extends along the circumferential direction of the first nipper disc (12) in the first hemispherical groove (16), the first groove (19) is obliquely arranged towards the direction close to the second nipper disc (13), a second groove (20) extends along the circumferential direction of the second nipper disc (13) in the second hemispherical groove (17), the second groove (20) is obliquely arranged towards the direction close to the first nipper disc (12), and the first groove (19) and the second groove (20) are oppositely arranged; an elastic reset component (21) is arranged between the inner walls of the first through hole (14) and the second through hole (15) so that the relative rotation position of the first clamp plate (12) and the second clamp plate (13) can be kept in a state that the first hemispherical groove (16) is opposite to the second hemispherical groove (17); the first caliper disc (12) and the second caliper disc (13) are provided with operating components (22) so that the first caliper disc (12) and the second caliper disc (13) can generate relative rotation angles.

3. The disc brake of claim 2, wherein: elastic reset component (21) are including a plurality of first supporting shoes (23) and a plurality of second supporting shoes (24) that circumference range in first perforation (14) inner wall of circumference range in second perforation (15) inner wall, the quantity of first supporting shoe (23) is unanimous with second supporting shoe (24) and is relative the setting, the both sides of first supporting shoe (23) and second supporting shoe (24) that set up relatively all are provided with extension spring (25), the one end of extension spring (25) is fixed in the inner wall of first perforation (14), the other end is fixed in the inner wall of second perforation (15).

4. The disc brake of claim 2, wherein: the operating assembly (22) comprises a first support lug (26) and a second support lug (27) which are respectively arranged on the outer peripheral surfaces of the first nipper disc (12) and the second nipper disc (13), the first support lug (26) and the second support lug (27) are respectively positioned at positions close to the tops of the first nipper disc (12) and the second nipper disc (13), and an interval is kept between the first support lug and the second support lug; first journal stirrup (26) and second journal stirrup (27) pin joint have first connecting rod (28) and second connecting rod (29) respectively, and the tip pin joint that first connecting rod (28) kept away from first journal stirrup (26) is in the tip of second connecting rod (29) keeping away from second journal stirrup (27), and the pivot department pin joint of first connecting rod (28) and second connecting rod (29) has actuating lever (30), and the inside wall of appearance chamber (3) runs through has guide hole (31) so that actuating lever (30) wear to locate brake drum (1) outside.

5. The disc brake of claim 4, wherein: a sealing cover (32) covering the guide hole (31) is arranged outside the brake drum (1), and a guide hole (33) for the driving rod (30) to slide and penetrate is formed in the plate surface of the sealing cover (32).

6. The disc brake of claim 2, wherein: a plurality of limiting seats (34) which are abutted against the outer peripheral surfaces of the first jaw disc (12) and the second jaw disc (13) are circumferentially arranged on the inner peripheral surface of the accommodating cavity (3).

7. The disc brake of any one of claims 1 to 6, characterized in that: the first brake panel (7) is detachably connected with the brake cover (2), and the second brake panel (8) is detachably connected with the bottom of the accommodating cavity (3); a first supporting sheet (35) is attached and fixed to the end face, close to the brake cover (2), of the first brake panel (7), and a second supporting sheet (36) is attached and fixed to the end face, close to the bottom of the accommodating cavity (3), of the second brake panel (8); two sides of the end surface of the first supporting sheet (35) close to the brake cover (2) are vertically extended with first threaded rods (37), and two sides of the end surface of the second supporting sheet (36) close to the bottom of the cavity (3) are vertically extended with second threaded rods (38); a first penetrating hole (39) for two first threaded rods (37) to penetrate is formed in the surface of the brake cover (2), and a second penetrating hole (40) for two second threaded rods (38) to penetrate is formed in the bottom of the accommodating cavity (3); the first threaded rod (37) passes through the first through hole (39) and then exceeds the end face of the brake cover (2), and a first nut (41) is screwed on the exceeding part of threads; the second threaded rod (38) passes through the second through hole (40) and then exceeds the outer end face of the brake drum (1), and a second nut (42) is screwed on the exceeding part of threads.

Images