Axle brake structure and axle

Abstract

The utility model discloses an axle brake structure and an axle. The axle brake structure comprises a brake structure connected to the axle, a support and a driving unit. The brake structure comprises two brake shoe assemblies, two mounting seats, two cam shafts, two adjusting arms and a connecting shaft, and is characterized in that the inner ends of the cam shafts are rotationally connected with the mounting seats, and cams at the outer ends of the cam shafts abut against brake shoes of the adjacent brake shoe assemblies; the adjusting arms are fixedly connected to the inner end of the cam shaft, and the two ends of the connecting shaft are connected with the two free ends of the two adjusting arms respectively. The driving unit is fixed to the support, a telescopic rod of the driving unit is fixedly connected with the connecting shaft, and when the vehicle is kept in a stopped state, the telescopic rod of the driving unit drives the cam to rotate through the adjusting arm so that the shoe piece of the brake shoe can abut against the inner circumferential wall of a brake drum of the axle. And the situation that the vehicle slides and is not easy to control when the vehicle needs to be kept in a stop state for a long time in the operation process can be prevented.

Description

Technical Field

[0001] This utility model relates to the field of brake technology, specifically to a vehicle axle brake structure and a vehicle axle. Background Technology

[0002] The existing vehicle axle brake structure includes a brake mechanism mounted on the axle, two brackets, and two air chambers. The brake mechanism includes two brake shoe assemblies connected to both ends of the axle, two mounting seats located between the two brake shoe assemblies, two camshafts, and two adjusting arms. The inner end of one camshaft is rotatably connected to one mounting seat, and the cam on the outer end of the camshaft abuts against the brake shoes of the brake shoe assemblies. An adjusting arm is fixedly connected to the inner end of one camshaft, and a bracket is located in front of one adjusting arm. The two air chambers are fixed to the two brackets and connected to the two adjusting arms respectively, so that the adjusting arms drive the cams to rotate, causing the brake shoe pads to abut against the inner circumferential wall of the axle brake drum, thereby achieving braking. However, when the vehicle needs to remain stationary for an extended period during operation, the brakes of the above structure are in a non-operating state, that is, the brakes do not apply, resulting in a risk of the vehicle rolling away after being stationary for a long time. Utility Model Content

[0003] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a vehicle axle brake structure and axle that can improve safety.

[0004] To achieve the above objectives, the embodiments of this utility model adopt the following technical solutions:

[0005] An axle brake structure, mounted on an axle, includes a brake structure, a bracket, and a drive unit connected to the axle;

[0006] The braking structure includes two brake shoe assemblies respectively connected to both ends of the axle, two mounting seats located between the two brake shoe assemblies, two camshafts, two adjusting arms, and a connecting shaft. The two mounting seats are fixed to the outer peripheral wall of the axle and are arranged opposite to each other. The inner end of one camshaft is rotatably connected to one mounting seat, and the cam at the outer end of one camshaft abuts against the brake shoe of the adjacent brake shoe assembly. An adjusting arm is located on one side of one mounting seat and is fixedly connected to the inner end of one camshaft, and each adjusting arm has a free end away from the camshaft. The two ends of the connecting shaft are respectively connected to the two free ends.

[0007] The bracket is located on one side of the mounting base and fixed to the outer peripheral wall of the axle;

[0008] The drive unit is fixed to the bracket and its telescopic rod is fixedly connected to the connecting shaft. When the vehicle is stationary, the telescopic rod of the drive unit drives the cam to rotate through the adjusting arm so that the brake shoe abuts against the inner peripheral wall of the brake drum of the axle.

[0009] Furthermore, each of the free ends has a through hole along the axial direction of the camshaft, and a bushing is fitted in each of the bushing holes. The two ends of the connecting shaft are respectively clearance fitted with the two bushings.

[0010] Furthermore, a sleeve is fitted on the outer peripheral wall of the connecting shaft between the two adjusting arms. The inner peripheral wall of the sleeve is in clearance fit with the outer peripheral wall of the connecting shaft, and a connecting plate is fixed on the outer peripheral wall of the sleeve. The telescopic rod is fixedly connected to the connecting plate.

[0011] Furthermore, one end of the connecting shaft is formed with a limiting part located outside the outer side of the adjusting arm, the diameter of the limiting part being larger than the diameter of the shaft hole, and the other end of the connecting shaft is formed with a positioning part located outside the outer side of another adjusting arm, the positioning part having a positioning hole extending radially through it along the connecting shaft, a cotter pin fitting inside the positioning hole, the two ends of the cotter pin being located outside the opposite two outer side walls of the positioning part respectively.

[0012] Furthermore, each of the free ends is provided with a plurality of shaft holes, which are distributed along the length direction of the adjusting arm. A sleeve is fitted on the outer peripheral wall of the connecting shaft between the two adjusting arms. There is a gap between each end face of the sleeve and the inner side wall of the corresponding adjusting arm. The telescopic rod is fixedly connected to the sleeve.

[0013] Furthermore, the bracket has a mounting plate located in front of the adjusting arm, and the two ends of the mounting plate are bent backward to form a fixing plate. The two fixing plates are located outside the outer side wall of the two adjusting arms and are fixedly connected to the outer peripheral wall of the axle. The fixing plate is located in front of the mounting seat. The drive unit is fixed to the front plate surface of the mounting plate and its telescopic rod passes backward through the mounting plate to be fixedly connected to the connecting shaft.

[0014] Furthermore, a connecting plate is welded to the outer peripheral wall of the connecting shaft. A first pin hole is formed on the upper surface of the connecting plate, and the first pin hole penetrates the lower surface of the connecting plate downwards. The driving unit is a hydraulic cylinder. A groove is recessed at the end face of the telescopic rod of the hydraulic cylinder. The groove penetrates the telescopic rod along the axial direction of the connecting shaft and engages with the connecting plate. A second pin hole is also formed on the top surface of the outer peripheral wall of the telescopic rod, corresponding to the groove. The second pin hole corresponds to the first pin hole and penetrates the bottom surface of the outer peripheral wall of the telescopic rod downwards. The axle brake structure also includes a locking pin that cooperates with the first pin hole and the second pin hole.

[0015] The axle brake structure of this utility model features a drive unit with a telescopic rod fixedly connected to a connecting shaft. When the vehicle is stationary, the telescopic rod drives a cam to rotate via an adjusting arm, causing the brake shoes to abut against the inner wall of the brake drum on the axle. This achieves braking when the vehicle is stationary for an extended period, preventing the vehicle from slipping and becoming difficult to control when it needs to remain stationary for a long time during operation, thus improving safety. The axle brake structure of this utility model is simple, highly safe, and compact.

[0016] This utility model embodiment also provides an axle, including the axle brake structure described in any of the above embodiments. Attached Figure Description

[0017] Figure 1 This is a partial exploded perspective view of the axle brake structure according to an embodiment of the present utility model;

[0018] Figure 2 for Figure 1 A magnified view of part A;

[0019] Figure 3 for Figure 2 A partial sectional view. Detailed Implementation

[0020] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments:

[0021] like Figures 1 to 3 As shown, this utility model embodiment provides a vehicle axle brake structure, which is installed on the axle 100 of a dock crane axle or an engineering vehicle axle, including a brake structure 1, a bracket 2 and a drive unit 3 connected to the axle 100.

[0022] The braking structure 1 includes two brake shoe assemblies respectively connected to both ends of the axle 100, two mounting seats 12 located between the two brake shoe assemblies, two camshafts 13, two adjusting arms 14, and a connecting shaft 15. The two mounting seats 12 are fixed to the outer peripheral wall of the axle 100 and are arranged opposite each other. The two brake shoe assemblies are respectively located inside the two brake drums 200 of the axle. Each brake shoe assembly has a brake base plate 16 and two opposing brake shoes 11. One end of the two brake shoes 11 is rotatably connected to the brake base plate 16. The inner end of a camshaft 13 is rotatably connected to a mounting seat 12, and the cam 131 at the outer end of the camshaft 13 abuts against the other end of the brake shoe 11 of the adjacent brake shoe assembly to drive the brake shoe 11 to rotate. An adjusting arm 14 is located on one side of a mounting seat 12 and is fixedly connected to the inner end of a camshaft 13. Each adjusting arm 14 has a free end 141 away from the camshaft 13, and both ends of the connecting shaft 15 are respectively connected to the two free ends 141.

[0023] Each free end 141 has a through-hole 1411 along the axial direction of the camshaft 13. A bushing (unnumbered) fits in each bushing 1411. The two ends of the connecting shaft 15 are respectively clearance-fitted with the two bushings to give the connecting shaft 15 a degree of freedom of movement, which facilitates installation and use and prevents jamming. Specifically, each free end 141 has multiple bushings 1411, which are distributed along the length of the adjusting arm 14. In this embodiment, there are two bushings 1411. By setting multiple bushings 1411, the installation position of the connecting shaft 15 can be adjusted according to actual needs.

[0024] To facilitate replacement and improve structural strength, a sleeve 151 is fitted onto the outer peripheral wall of the connecting shaft 15, located between the two adjusting arms 14. The inner peripheral wall of the sleeve 151 is clearance-fitted with the outer peripheral wall of the connecting shaft 15 to allow the sleeve 151 to have a degree of freedom of movement in the radial direction. A gap exists between each end face of the sleeve 151 and the inner sidewall of its corresponding adjusting arm 14 to allow the sleeve 151 to have a degree of freedom of movement in the axial direction, facilitating installation. A connecting plate 152 is fixed to the outer peripheral wall of the sleeve 151. Specifically, the connecting plate 152 is welded to the outer peripheral wall of the connecting shaft 15. A first pin hole 1521 is formed on the upper surface of the connecting plate 152, extending downwards through the lower surface of the connecting plate 152.

[0025] More specifically, one end of the connecting shaft 15 has a limiting portion 153 located outside the adjusting arm 14, the diameter of which is larger than the diameter of the shaft hole 1411. The other end of the connecting shaft 15 has a positioning portion 154 located outside the other adjusting arm 14. The positioning portion 154 has a positioning hole 1541 extending radially through the connecting shaft 15, and a cotter pin 155 fits inside the positioning hole 1541. The two ends of the cotter pin 155 are located outside the opposite outer walls of the positioning portion 154. By providing the limiting portion 153 and the cotter pin 155, the connecting shaft 15 is axially limited, thus ensuring stable positioning of the connecting shaft 15.

[0026] The bracket 2 is located on one side of the mounting base 12 and fixed to the outer peripheral wall of the axle 100. Specifically, the bracket 2 has a mounting plate 21 located in front of the adjusting arm 14. The two ends of the mounting plate 21 are bent backward to form a fixing plate 22. The two fixing plates 22 are located outside the outer walls of the two adjusting arms 14 to save installation space and are located in front of the mounting base 12, making the axle structure more compact. The two fixing plates 22 are fixed to the outer peripheral wall of the axle 100 by welding.

[0027] The drive unit 3 is fixed on the bracket 2 and its telescopic rod 31 is fixedly connected to the connecting shaft 15. Specifically, the drive unit 3 is fixed on the front plate surface of the mounting plate 21 and its telescopic rod 31 passes through the mounting plate 21 to be fixedly connected to the connecting shaft 15. More specifically, the telescopic rod 31 is fixedly connected to the sleeve 151. When the vehicle is stationary, the telescopic rod 31 of the drive unit 3 drives the cam 131 to rotate through the adjusting arm 14 so that the brake shoe 11 abuts against the inner peripheral wall of the brake drum 200 of the axle, thereby achieving braking when the vehicle is stationary for a long time. This prevents the vehicle from slipping and becoming difficult to control when it needs to remain stationary for a long time during operation, thereby improving safety.

[0028] More specifically, the drive unit 3 is a hydraulic cylinder, and its telescopic rod 31 is fixedly connected to the connecting plate 152. In this embodiment, the drive unit 3 is an oil cylinder, and the end face of the telescopic rod 31 of the oil cylinder is recessed to form a slot 311. The slot 311 passes through the telescopic rod 31 along the axial direction of the connecting shaft 15 and engages with the connecting plate 152 to achieve a stable connection between the connecting shaft 15 and the telescopic rod 31. This allows one oil cylinder to drive two adjusting arms 14 to rotate simultaneously through the connecting shaft 15, which not only saves installation space and makes the axle structure compact, but also simplifies the axle structure, further improving work efficiency and reducing costs. In this embodiment, a second pin hole 312 is also formed downward on the top surface of the outer peripheral wall of the telescopic rod 31 corresponding to the slot 311. The second pin hole 312 corresponds to the first pin hole 1521 and penetrates downward through the bottom surface of the outer peripheral wall of the telescopic rod 31. The axle brake structure also includes a locking pin (not shown) that cooperates with the first pin hole 1521 and the second pin hole 312. The locking pin locks the connecting shaft 15 and the telescopic rod 31, further improving the connection stability between the connecting shaft 15 and the telescopic rod 31 and preventing the connecting shaft 15 and the telescopic rod 31 from separating.

[0029] The axle brake structure of this utility model features a drive unit with a telescopic rod fixedly connected to a connecting shaft. When the vehicle is stationary, the telescopic rod drives a cam to rotate via an adjusting arm, causing the brake shoes to abut against the inner wall of the brake drum on the axle. This achieves braking when the vehicle is stationary for an extended period, preventing the vehicle from slipping and becoming difficult to control when it needs to remain stationary for a long time during operation, thus improving safety. The axle brake structure of this utility model is simple, highly safe, and compact.

[0030] This utility model embodiment also provides a vehicle axle, which is a dock crane vehicle axle, including the vehicle axle brake structure described in any of the above embodiments.

[0031] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or make equivalent substitutions for some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. An axle brake structure, mounted on an axle, characterized in that, Includes a braking structure, bracket, and drive unit connected to the axle; The braking structure includes two brake shoe assemblies respectively connected to both ends of the axle, two mounting seats located between the two brake shoe assemblies, two camshafts, two adjusting arms, and a connecting shaft. The two mounting seats are fixed to the outer peripheral wall of the axle and are arranged opposite to each other. The inner end of one camshaft is rotatably connected to one mounting seat, and the cam at the outer end of one camshaft abuts against the brake shoe of the adjacent brake shoe assembly. An adjusting arm is located on one side of one mounting seat and is fixedly connected to the inner end of one camshaft, and each adjusting arm has a free end away from the camshaft. The two ends of the connecting shaft are respectively connected to the two free ends. The bracket is located on one side of the mounting base and fixed to the outer peripheral wall of the axle; The drive unit is fixed to the bracket and its telescopic rod is fixedly connected to the connecting shaft. When the vehicle is stationary, the telescopic rod of the drive unit drives the cam to rotate through the adjusting arm so that the brake shoe abuts against the inner peripheral wall of the brake drum of the axle.

2. The axle brake structure as described in claim 1, characterized in that, Each of the free ends has a through hole along the axial direction of the camshaft, and a bushing is fitted in each of the bushing holes. The two ends of the connecting shaft are respectively clearance fitted with the two bushings.

3. The axle brake structure as described in claim 2, characterized in that, A sleeve is fitted on the outer peripheral wall of the connecting shaft between the two adjusting arms. The inner peripheral wall of the sleeve is in clearance fit with the outer peripheral wall of the connecting shaft. A connecting plate is fixed on the outer peripheral wall of the sleeve, and the telescopic rod is fixedly connected to the connecting plate.

4. The axle brake structure as described in claim 2, characterized in that, One end of the connecting shaft has a limiting part located outside the outer side of the adjusting arm. The diameter of the limiting part is larger than the diameter of the shaft hole. The other end of the connecting shaft has a positioning part located outside the outer side of another adjusting arm. The positioning part has a positioning hole that passes through it radially along the connecting shaft. A cotter pin fits inside the positioning hole. The two ends of the cotter pin are located outside the opposite two outer side walls of the positioning part.

5. The axle brake structure as described in claim 2, characterized in that, Each of the free ends has a plurality of shaft holes, which are distributed along the length of the adjusting arm. A sleeve is fitted on the outer peripheral wall of the connecting shaft between the two adjusting arms. There is a gap between each end face of the sleeve and the inner side wall of the corresponding adjusting arm. The telescopic rod is fixedly connected to the sleeve.

6. The axle brake structure as described in claim 1, characterized in that, The bracket has a mounting plate located in front of the adjusting arm. The two ends of the mounting plate are bent backward to form a fixing plate. The two fixing plates are located outside the outer walls of the two adjusting arms and are fixedly connected to the outer peripheral wall of the axle. The fixing plate is located in front of the mounting seat. The drive unit is fixed to the front plate surface of the mounting plate and its telescopic rod passes backward through the mounting plate to be fixedly connected to the connecting shaft.

7. The axle brake structure as described in claim 1, characterized in that, A connecting plate is welded to the outer peripheral wall of the connecting shaft. A first pin hole is formed on the upper surface of the connecting plate, and the first pin hole penetrates the lower surface of the connecting plate. The driving unit is a hydraulic cylinder. A groove is recessed at the end face of the telescopic rod of the hydraulic cylinder. The groove penetrates the telescopic rod along the axial direction of the connecting shaft and engages with the connecting plate. A second pin hole is formed on the top surface of the outer peripheral wall of the telescopic rod, corresponding to the groove. The second pin hole corresponds to the first pin hole and penetrates the bottom surface of the outer peripheral wall of the telescopic rod. The axle brake structure also includes a locking pin that cooperates with the first pin hole and the second pin hole.

8. An axle, characterized in that, Includes the axle brake structure as described in any one of claims 1 to 7.

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