Heavy tractor brake assembly

Abstract

The utility model discloses a heavy-duty tractor brake assembly, which relates to the technical field of tractor manufacture and comprises a brake shell, the rear side of the brake shell is fixedly connected with a rear end cover through a bolt, the center of the brake shell is rotatably connected with a brake hub, a brake pin shaft is fixedly inserted into the center of the upper end of the rear end cover, and the brake pin shaft is fixedly connected with the brake hub. Two brake shoes are rotationally arranged on the brake pin shaft in a pin joint mode, a cam is rotationally installed in the center of the lower end of the rear end cover, the cam abuts against the inner sides of the lower ends of the two brake shoes, a friction block and a fixed pressing plate are arranged, the friction block can move outwards after the outer end is abraded, and compared with rivet fixing, maintenance and replacement, the friction block is more convenient to use; the multiple friction blocks are the same in shape and specification, the positions of the friction blocks can be adjusted according to the abrasion degree difference of the friction blocks when the friction blocks are moved outwards, and the service life of the friction blocks is further prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of tractor manufacturing, in particular to a brake assembly of a heavy-duty tractor. Background Art

[0002] The existing heavy-duty vehicle cam-opening brake has two ends of the brake roller installed on the two side ribs of one end of the horseshoe. When braking, the cam moves the middle of the brake roller, and then the two ends of the brake roller transmit the force to the ribs, driving the horseshoe to expand outward, and finally driving the friction plate to contact and rub against the brake drum to achieve braking.

[0003] Relevant technicians engaged in tractor maintenance found in their work that the rivets of the brake shoe and friction lining of the drum brake shoe assembly for heavy-duty vehicles are riveted in an edge-symmetrical manner, which makes the gap between the brake shoe and the friction lining larger, affecting the braking effect and service life. In addition, the braking force of heavy vehicles is relatively large, which can easily cause rapid wear of the friction plate and uneven wear of the bearing surfaces on both sides of the brake shoe. However, the brake shoe needs to be replaced as a whole during maintenance, which increases the maintenance cost. We propose a heavy-duty tractor brake assembly. Utility Model Content

[0004] The purpose of the utility model is to solve the problem that the rivets of the brake shoe and the friction lining of the drum brake shoe assembly for heavy vehicles are riveted in a symmetrical manner at the edge, which makes the gap between the brake shoe and the friction lining larger, affecting the braking effect and service life. In addition, the braking force of heavy vehicles is relatively large, which easily causes rapid wear of the friction plate and uneven wear of the force-bearing surfaces on both sides of the brake shoe. However, the entire brake shoe needs to be replaced during maintenance, which increases the maintenance cost. The utility model provides a heavy-duty tractor brake assembly.

[0005] In order to achieve the above-mentioned purpose, the utility model specifically adopts the following technical solutions:

[0006] A heavy-duty tractor brake assembly comprises a brake housing, the rear side of which is fixedly connected to a rear end cover by bolts, and the center of the brake housing is rotatably connected to a brake hub, the upper center of the rear end cover is plugged and fixed with a brake pin shaft, and two brake shoes are rotatably pinned on the brake pin shaft, a cam is rotatably installed at the lower center of the rear end cover, and the cam abuts against the inner sides of the lower ends of two brake shoes, two return springs are fixedly connected between the two brake shoes, the brake shoe is an arc-shaped plate-like structure with ribs provided at the center of the inner side, and a plurality of mounting holes are evenly opened on the front and rear sides of the outer wall of the brake shoe, and the mounting holes are arranged close to the front and rear sides of the central rib of the brake shoe, friction blocks are inserted into the plurality of mounting holes, the front and rear sides of the rib of the brake shoe are fixedly connected with fixed pressure plates, and the inner side of the fixed pressure plate is fixedly connected to the two sides of the friction block.

[0007] Furthermore, a plurality of reinforcement slots are provided at the center of the front and rear sides of the friction block, and a plurality of reinforcement plugs are fixedly connected to the reinforcement slots on the inner side of the fixed pressure plate corresponding to the two side reinforcement slots, and the plurality of reinforcement plugs are correspondingly inserted in the reinforcement slots.

[0008] Furthermore, both ends of the ribs of the brake shoe and the fixed pressure plate are provided with end bolt insertion holes, and the end bolt insertion holes on the brake shoe and the fixed pressure plate are aligned and then connected by bolts.

[0009] Furthermore, semicircular protrusions are correspondingly arranged at the front and rear of the middle of the inner wall of the brake shoe and the fixed pressure plate, and a central reinforcement socket is opened in the center of the semicircular protrusion. After the central reinforcement socket on the brake shoe and the fixed pressure plate is aligned, a connecting bolt is inserted through it.

[0010] Furthermore, a compression spring is sleeve-connected to an outer wall of the connecting bolt on the brake shoe and the fixed pressure plate corresponding to a section between the brake shoe and the fixed pressure plate.

[0011] Furthermore, soft rubber insert pads are embedded on both sides of the side wall of the friction block corresponding to the reinforcement slot, and a plurality of reinforcement nails are fixedly connected to the side of the fixed pressure plate facing the brake shoe rib, and the positions of the reinforcement nails and the soft rubber insert pads correspond.

[0012] The beneficial effects of the utility model are as follows:

[0013] 1. The utility model tractor driving axle is rotatably mounted on the center of the brake housing through a bearing, and the brake hub is key-connected and fixed to the outer wall of the tractor driving axle. The brake shoes on both sides can be kept contracted by the tensile elastic force of the return spring. A swing arm is fixedly connected to the front side of the cam through a cam, and the swing arm drives the cam to rotate. The cam structure of the cam pushes the brake shoes on both sides to expand, thereby switching the expansion and contraction of the brake shoes. The multiple friction blocks fixed on the brake shoes are pressed and rubbed against the inner wall of the brake hub to achieve braking of the tractor driving axle. The friction blocks and the fixed pressure plate are directly plugged into the brake shoes. , and then it is fixed by pressing and fixing the pressure plate. The friction block can be moved outward after the outer end is worn. Compared with rivet fixing, maintenance and replacement are more convenient. There is no gap between the integrated friction block and the outer wall of the brake shoe, and the friction life is longer. At the same time, due to the relatively large braking force of heavy vehicles, the rapid wear of the friction plate can be solved by moving the friction block outward and switching the reinforcement plug block corresponding to the reinforcement slot to ensure that the friction block is pressed and fixed while the worn friction block continues to be used. Multiple friction blocks have the same shape and specifications. When moving the friction block outward, the position of the friction block can be adjusted according to the difference in the degree of wear of the friction block, thereby further improving the service life of the friction block.

[0014] 2. The utility model provides a reinforcement slot and a reinforcement plug-in block, which are plugged and fixed to bear the pressure of the friction block toward the axis center. When the outer wall of the friction block is pressed against the brake hub, sufficient radial bearing capacity is provided for the friction block, ensuring that the friction block can withstand strong pressure when the heavy tractor brakes, ensuring the friction effect, and the provision of multiple reinforcement slots and multiple reinforcement plug-ins facilitates the outward movement and switching of the friction block.

[0015] 3. The utility model provides soft rubber inserts and reinforcing nails, and the reinforcing nails are pressed tightly against the outer wall of the friction block to improve the fixing effect of the friction block. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a side sectional view of the utility model;

[0017] Figure 2 It is a front cross-sectional view of the utility model;

[0018] Figure 3 It is a three-dimensional diagram of the friction block of the utility model;

[0019] Figure 4 It is a cross-sectional structural diagram of the fixed pressing plate of the utility model.

[0020] Figure numerals: 1. brake housing; 2. brake hub; 3. rear end cover; 4. brake pin; 5. brake shoe; 6. cam; 7. return spring; 8. mounting socket; 9. friction block; 10. reinforcement slot; 11. fixed pressure plate; 12. reinforcement plug block; 13. soft rubber pad; 14. reinforcement nail; 15. end bolt socket; 16. center reinforcement socket. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solution and advantages of the embodiments of the present utility model clearer, the technical solution in the embodiments of the present utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the present utility model.

[0022] See also Figure 1 - Figure 4The utility model provides a heavy-duty tractor brake assembly, including a brake housing 1, a rear end cover 3 is fixedly connected to the rear side of the brake housing 1 by bolts, and a brake hub 2 is rotatably connected to the center of the brake housing 1, a brake pin shaft 4 is plugged and fixed to the upper center of the rear end cover 3, and two brake shoes 5 are rotatably connected to the upper pin of the brake pin shaft 4, a cam 6 is rotatably installed at the lower center of the rear end cover 3, and the cam 6 is against the inner sides of the lower ends of the two brake shoes 5, and two return springs 7 are fixedly connected between the two brake shoes 5, the brake shoe 5 is an arc-shaped plate-shaped structure with ribs arranged at the center of the inner side, and a plurality of mounting holes 8 are evenly opened on the front and rear sides of the outer wall of the brake shoe 5, and the mounting holes 8 are arranged close to the front and rear sides of the central rib of the brake shoe 5, and friction blocks 9 are inserted in the plurality of mounting holes 8, and the front and rear sides of the rib of the brake shoe 5 are fixedly connected to fixed pressure plates 11, and the inner side of the fixed pressure plate 11 is fixedly connected to the two sides of the friction block 9.

[0023] In the present embodiment, preferably, a plurality of reinforcement slots 10 are provided at the centers of the front and rear sides of the friction block 9, and a plurality of reinforcement plug blocks 12 are fixedly connected to the reinforcement slots 10 on the inner side of the fixed pressure plate 11 corresponding to the reinforcement slots 10 on both sides, and the plurality of reinforcement plug blocks 12 are correspondingly inserted in the reinforcement slots 10; through the setting of the reinforcement slots 10 and the reinforcement plug blocks 12, the reinforcement slots 10 and the reinforcement plug blocks 12 are plugged and fixed to bear the pressure of the friction block 9 toward the axis center, and when the outer wall of the friction block 9 is pressed against the brake hub 2, sufficient radial bearing capacity is provided for the friction block 9, ensuring that the friction block 9 can withstand strong pressure when the heavy tractor brakes, ensuring the friction effect, and the setting of the plurality of reinforcement slots 10 and the plurality of reinforcement plug blocks 12 facilitates the outward movement switching of the friction block 9.

[0024] In this embodiment, preferably, the ribs of the brake shoe 5 and both ends of the fixed pressure plate 11 are provided with end bolt holes 15, and the end bolt holes 15 on the brake shoe 5 and the fixed pressure plate 11 are aligned and then connected by inserting bolts; the provided end bolt holes 15 facilitate the fixation of the two ends of the fixed pressure plate 11 to the brake shoe 5.

[0025] In the present embodiment, preferably, semicircular protrusions are correspondingly provided on the front and rear middle parts of the inner walls of the brake shoe 5 and the fixed pressure plate 11, and a central reinforcement socket 16 is opened in the center of the semicircular protrusion. After the brake shoe 5 and the central reinforcement socket 16 on the fixed pressure plate 11 are aligned, a connecting bolt is inserted through it; through the set central reinforcement socket 16, the central reinforcement socket 16 can reinforce the middle part of the brake shoe 5 and the fixed pressure plate 11, thereby improving the firmness of the fixation of the brake shoe 5 and the fixed pressure plate 11.

[0026] In this embodiment, preferably, a compression spring is connected to the outer wall of the connecting bolt on the brake shoe 5 and the fixed pressure plate 11 corresponding to a sleeve section between the brake shoe 5 and the fixed pressure plate 11; by providing the compression spring, the fixed pressure plate 11 is ensured to be tightened while avoiding excessive pressure on both sides of the fixed pressure plate 11 to cause bending and deformation, thereby improving the service life of the fixed pressure plate 11.

[0027] In this embodiment, preferably, soft rubber pads 13 are embedded on both sides of the side walls of the friction block 9 corresponding to the reinforcement slots 10, and a plurality of reinforcement nails 14 are fixedly connected to the side of the fixed pressure plate 11 facing the ribs of the brake shoe 5, and the positions of the reinforcement nails 14 correspond to those of the soft rubber pads 13; by setting the soft rubber pads 13 and the reinforcement nails 14, the reinforcement nails 14 can improve the fixing effect of the friction block 9 after the fixed pressure plate 11 is pressed against the outer wall of the friction block 9.

[0028] The working principle and use process of the utility model are as follows: when the device is used, the tractor driving wheel axle is rotatably installed in the center of the brake housing 1 through the bearing, and the brake hub 2 is key-connected and fixed to the outer wall of the tractor driving wheel axle, and the brake shoes 5 on both sides can be kept contracted by the tensile elastic force of the return spring 7, and the cam 6 is arranged, and the front side of the cam 6 is fixedly connected with a swing arm, and the swing arm drives the cam 6 to rotate, and the cam structure of the cam 6 pushes the brake shoes 5 on both sides to expand, thereby switching the expansion and contraction of the brake shoes 5, and the multiple friction blocks 9 fixed on the brake shoes 5 are pressed and rubbed against the inner wall of the brake hub 2 to achieve braking of the tractor driving wheel axle, and the friction blocks 9 and the fixed pressure plate 11 are arranged, and the friction blocks 9 are directly It is plugged into the brake shoe 5 and then fixed by pressing and fixing the fixing plate 11. The friction block 9 can be moved outward after the outer end is worn. Compared with rivet fixing, maintenance and replacement are more convenient. There is no gap between the integrated friction block 9 and the outer wall of the brake shoe 5, and the friction life is longer. At the same time, due to the relatively large braking force of heavy vehicles, the rapid wear of the friction plate can be solved by moving the friction block 9 outward and switching the reinforcement plug 12 corresponding to the reinforcement slot 10 to ensure that the friction block 9 is pressed and fixed while the worn friction block 9 continues to be used. Multiple friction blocks 9 have the same shape and specifications. When moving the friction block 9 outward, the position of the friction block 9 can be adjusted according to the difference in the degree of wear of the friction block 9, thereby further improving the service life of the friction block 9.

[0029] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A heavy-duty tractor brake assembly, comprising a brake housing (1), the rear side of the brake housing (1) being fixedly connected to a rear end cover (3) by bolts, and the center of the brake housing (1) being rotatably connected to a brake hub (2), a brake pin shaft (4) being plugged and fixed at the center of the upper end of the rear end cover (3), and two brake shoes (5) being rotatably pinned on the brake pin shaft (4), a cam (6) being rotatably mounted at the center of the lower end of the rear end cover (3), and the cam (6) being abutted against the inner sides of the lower ends of the two brake shoes (5), and two return springs (7) being fixedly connected between the two brake shoes (5), characterized in that: The brake shoe (5) is an arc-shaped plate-like structure with ribs arranged at the inner center, and a plurality of mounting holes (8) are evenly arranged on the front and rear sides of the outer wall of the brake shoe (5), and the mounting holes (8) are arranged close to the front and rear sides of the central rib of the brake shoe (5), and friction blocks (9) are inserted into the plurality of mounting holes (8), and the front and rear sides of the rib of the brake shoe (5) are fixedly connected to fixed pressure plates (11), and the inner side of the fixed pressure plate (11) is fixedly connected to the two sides of the friction block (9).

2. A heavy-duty tractor brake assembly according to claim 1, characterized in that: A plurality of reinforcement slots (10) are provided at the center of both the front and rear sides of the friction block (9), and a plurality of reinforcement plug blocks (12) are fixedly connected to the inner side of the fixed pressure plate (11) corresponding to the reinforcement slots (10) on both sides, and the plurality of reinforcement plug blocks (12) are correspondingly inserted into the reinforcement slots (10).

3. A heavy-duty tractor brake assembly according to claim 1, characterized in that: The ribs of the brake shoe (5) and both ends of the fixed pressure plate (11) are provided with end bolt insertion holes (15), and the end bolt insertion holes (15) on the brake shoe (5) and the fixed pressure plate (11) are aligned and then connected by inserting bolts.

4. A heavy-duty tractor brake assembly according to claim 3, characterized in that: Semicircular protrusions are correspondingly arranged at the front and rear middle parts of the inner walls of the brake shoe (5) and the fixed pressure plate (11), and a central reinforcement plug hole (16) is opened at the center of each semicircular protrusion. After the brake shoe (5) and the central reinforcement plug hole (16) on the fixed pressure plate (11) are aligned, a connecting bolt is inserted through them.

5. A heavy-duty tractor brake assembly according to claim 1, characterized in that: The outer wall of the connecting bolt on the brake shoe (5) and the fixed pressure plate (11) is sleeve-connected with a compression spring corresponding to a section between the brake shoe (5) and the fixed pressure plate (11).

6. A heavy-duty tractor brake assembly according to claim 1, characterized in that: Soft rubber insert pads (13) are embedded on both sides of the side wall of the friction block (9) corresponding to the reinforcement slot (10), and a plurality of reinforcement nails (14) are fixedly connected to the side of the fixed pressure plate (11) facing the rib of the brake shoe (5), and the positions of the reinforcement nails (14) and the soft rubber insert pads (13) correspond.

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