Durability test bench for gap mechanism of drum brake

Abstract

The invention discloses a durability test bench for a gap mechanism of a drum brake, and relates to the technical field of drum brake tests. The durability test bed for the gap mechanism of the drum brake comprises a base, a second mounting mechanism and a lifting mechanism, a bedplate is arranged right above the base, a first mounting mechanism is arranged on the bedplate, the first mounting mechanism comprises a hydraulic rod, a connecting block, a connecting rod, a butt-joint disc, a butt-joint sleeve and a clamping mechanism, and the hydraulic rod is arranged at the top of the bedplate. And a connecting block is fixedly mounted at the free end of the hydraulic rod. According to the durability test bench for the gap mechanism of the drum brake, through the cooperation of the first mounting mechanism 3 and the second mounting mechanism 4, especially under the action of a clamping mechanism 39 and an inserting mechanism 48, when different brake assemblies 6 are replaced for testing and a brake drum 9 is disassembled and assembled, quick disassembly and assembly can be carried out, time and labor are saved, the test steps are simplified, and the test efficiency is improved. And the practicability of the test bench is improved.

Description

Technical Field

[0001] The invention relates to the technical field of drum brake testing, in particular to a drum brake clearance mechanism durability test bench. Background Art

[0002] Chinese patent document CN103162947A discloses a durability test bench for a drum brake clearance self-adjusting mechanism, comprising: a micro-motion device including a motor, a reducer, a bidirectional ball screw, two screw nuts, a support seat, a support block and two movable plates; a brake assembly and a test brake drum, the brake assembly including a brake base plate, a brake wheel cylinder and a brake shoe; an oil pressure supply system including an oil pump motor, an oil pump, an oil pump solenoid valve and an oil tank; an information acquisition and processing system including a communication-connected macro sensor and a computer, a support block is used to fix the brake base plate, thereby fixing the clearance self-adjusting mechanism, so that the position of the brake assembly is fixed, and the two halves of the test brake drum cut along the diameter are driven to slowly separate through the two movable plates, thereby simulating the increase process of the brake clearance.

[0003] However, the clearance self-adjusting mechanism and the brake drum on the above-mentioned test bench are both installed by bolts. The test of the clearance self-adjusting mechanism often requires testing of different batches of products, which leads to time-consuming and labor-intensive frequent replacement of test parts, making the test cumbersome. For this reason, we propose a drum brake clearance mechanism durability test bench. Summary of the invention

[0004] The purpose of the present invention is to provide a drum brake clearance mechanism durability test bench, which can solve the problem that some existing test benches are time-consuming and labor-intensive due to frequent bolt removal and replacement of parts.

[0005] To achieve the above object, the present invention provides the following technical solution: a drum brake clearance mechanism durability test bench, comprising: A base, with a table plate disposed directly above it; A second mounting mechanism, which is disposed on the table, and is used to simulate a process of increasing the brake clearance; A lifting mechanism is arranged between the base and the table, and is used to adjust the height of the test bench; The first mounting mechanism is arranged on the table top, and the first mounting mechanism includes a hydraulic rod, a connecting block, a connecting rod, a docking plate, a docking sleeve and a clamping mechanism. A hydraulic rod is arranged on the top of the table top, a connecting block is fixedly installed on the free end of the hydraulic rod, a connecting rod is fixedly installed on the top of the connecting block, a docking plate is fixedly installed on one end of the connecting rod, a docking sleeve is sleeved on the docking plate, a brake assembly is fixedly installed on the bottom of the docking sleeve, a clearance self-adjusting mechanism and a brake shoe are arranged on the brake assembly, a clamping mechanism is arranged on the docking plate, the clamping mechanism includes a groove, a fixing rod and a clamping rod, two groups of grooves are opened on the top of the docking plate, a group of fixing rods are fixedly installed on the inner walls of the two groups of grooves, a group of clamping rods are movably sleeved on the two groups of fixing rods, and one end of the two groups of clamping rods passes through the docking plate and the docking sleeve and extends to the outside of the docking sleeve.

[0006] Preferably, the clamping mechanism also includes a first spring and a lever, a group of first springs are sleeved on the two groups of fixed rods, one end of the two groups of first springs are fixedly connected to the corresponding clamping rods, the other end of the two groups of first springs are fixedly connected to the inner wall of the corresponding groove, and a group of levers are fixedly installed on the outer surface of the two groups of clamping rods.

[0007] Preferably, the first mounting mechanism also includes a first transmission groove, a first lead screw, a first movable block and a first motor. A first transmission groove is opened on the top of the table plate, and a first lead screw is rotatably installed between the inner walls on both sides of the first transmission groove. A first movable block that fits with the inner wall of the first transmission groove is threadedly installed on the first lead screw. The hydraulic rod is fixedly installed on the top of the first movable block, and a first motor is fixedly installed on the outer surface of one side of the table plate. The rotating shaft of the first motor is transmission connected to the first lead screw.

[0008] Preferably, the second mounting mechanism includes a second transmission groove, a second lead screw, a second motor, a second movable block, a movable plate, a slide groove, a slider and a plug-in mechanism. A second transmission groove is provided on the top of the table plate, a second lead screw is rotatably installed between the inner walls on both sides of the second transmission groove, a second motor is fixedly installed on the outer surface of the other side of the table plate, the rotating shaft of the second motor is transmission connected to the second lead screw, a second movable block which fits with the inner wall of the second transmission groove is threadedly installed on the second lead screw, a movable plate is fixedly installed on the top of the second movable block, a slide groove is provided on one side of the movable plate, a slider is slidably installed in the slide groove, a brake drum is fixedly installed on the top of the slider, and a plug-in mechanism is provided on the front side of the movable plate.

[0009] Preferably, the plug-in mechanism includes an insertion rod, a handle and a second spring. The insertion rod movably passes through the front side of the movable plate. A slot is provided on the slider. One end of the insertion rod is inserted into the slot. The handle is fixedly installed on the other end of the insertion rod. The second spring is sleeved on the insertion rod. One end of the second spring is fixedly connected to the handle, and the other end of the second spring is fixedly connected to the movable plate.

[0010] Preferably, the lifting mechanism includes a third transmission groove, a third motor, a bidirectional screw, a third movable block, a first U-shaped part, a second U-shaped part and a support rod. A third transmission groove is opened on the top of the base, and a third motor is fixedly installed on the outer surface of one side of the base. A bidirectional screw is fixedly installed between the inner walls on both sides of the third transmission groove. The rotating shaft of the third motor is transmission connected with the bidirectional screw. Two groups of third movable blocks that fit with the inner walls of the third transmission groove are threadedly installed on the bidirectional screw. A group of first U-shaped parts are fixedly installed on the top of the two groups of third movable blocks, and two groups of second U-shaped parts are fixedly installed on the bottom of the table. Two groups of support rods are arranged between the base and the table, and one end of the two groups of support rods are rotatably arranged on the corresponding first U-shaped parts, and the other ends of the two groups of support rods are rotatably arranged on the corresponding second U-shaped parts.

[0011] Preferably, a control panel is fixedly mounted on the top of the base.

[0012] Preferably, at least two groups of guide rods are fixedly mounted on the bottom of the platform, and each group of guide rods is movably inserted on the base.

[0013] Compared with the prior art, the present invention has the following beneficial effects: , the drum brake clearance mechanism durability test bench, through the cooperation of the first mounting mechanism 3 and the second mounting mechanism 4, especially under the action of the clamping mechanism 39 and the plug-in mechanism 48, can be quickly disassembled and assembled when replacing different brake assemblies 6 for testing and disassembling and assembling the brake drum 9, saving time and effort, simplifying the test steps, and solving the problem that the clearance self-adjusting mechanism and the brake drum on some existing test benches are installed by bolts, and the test of the clearance self-adjusting mechanism often requires testing of different batches of products, resulting in time-consuming and labor-intensive frequent replacement of test parts, causing cumbersome tests, thereby improving the practicality of the test bench.

[0014] The drum brake clearance mechanism durability test bench can raise and lower the table 2 through the lifting mechanism 5 according to the test needs or the height of the test personnel, and adjust the height of the test position, so that the test personnel can operate in a comfortable posture, thereby ensuring the use effect of the test bench and facilitating the promotion and use of the test bench. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The present invention is further described below in conjunction with the accompanying drawings and embodiments: Figure 1 It is a front perspective view of the present invention; Figure 2 It is a front perspective view of the base and its upper associated parts of the present invention; Figure 3 A front perspective view of the tabletop and its upper associated components of the present invention; Figure 4A top perspective view of the movable panel and its upper associated components of the present invention; Figure 5 A bottom perspective view of the movable panel and its upper associated components of the present invention; Figure 6 It is a structural schematic diagram of a partial first mounting mechanism of the present invention; Figure 7 for Figure 6 A magnified view of the structure at center.

[0016] Figure numerals: 1, base; 2, table; 3, first mounting mechanism; 31, first transmission groove; 32, first lead screw; 33, first movable block; 34, hydraulic rod; 35, connecting block; 36, connecting rod; 37, docking plate; 38, docking sleeve; 39, clamping mechanism; 391, groove; 392, fixing rod; 393, clamping rod; 394, first spring; 395, lever; 310, first motor; 4, second mounting mechanism; 41, second transmission groove; 42, second lead screw; 43, second Motor; 44, second movable block; 45, movable plate; 46, slide groove; 47, slider; 48, plug-in mechanism; 481, plug rod; 482, pull handle; 483, second spring; 5, lifting mechanism; 51, third transmission groove; 52, third motor; 53, bidirectional screw; 54, third movable block; 55, first U-shaped part; 56, second U-shaped part; 57, support rod; 6, brake assembly; 7, clearance self-adjusting mechanism; 8, brake shoe; 9, brake drum; 10, control panel; 11, guide rod. DETAILED DESCRIPTION

[0017] This section will describe in detail the specific embodiments of the present invention. The preferred embodiments of the present invention are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present invention, but it cannot be understood as a limitation on the scope of protection of the present invention.

[0018] See also Figure 1-7 The present invention provides a technical solution: a drum brake clearance mechanism durability test bench, comprising a base 1, a second mounting mechanism 4, a lifting mechanism 5 and a first mounting mechanism 3, a table 2 is arranged directly above the base 1, the second mounting mechanism 4 is arranged on the table 2, the second mounting mechanism 4 is used to simulate the process of increasing the brake clearance, the lifting mechanism 5 is arranged between the base 1 and the table 2, the lifting mechanism 5 is used to adjust the height of the test bench, a control panel 10 is fixedly installed on the top of the base 1, at least two groups of guide rods 11 are fixedly installed on the bottom of the table 2, and each group of guide rods 11 is movably inserted on the base 1; The first mounting mechanism 3 is arranged on the table 2, and the first mounting mechanism 3 includes a hydraulic rod 34, a connecting block 35, a connecting rod 36, a docking plate 37, a docking sleeve 38 and a clamping mechanism 39. The top of the table 2 is provided with a hydraulic rod 34, the free end of the hydraulic rod 34 is fixedly installed with a connecting block 35, the top of the connecting block 35 is fixedly installed with a connecting rod 36, one end of the connecting rod 36 is fixedly installed with a docking plate 37, the docking sleeve 38 is sleeved on the docking plate 37, and the bottom of the docking sleeve 38 is fixedly installed with a brake assembly 6 The brake assembly 6 is provided with a clearance self-adjusting mechanism 7 and a brake shoe 8, and the docking plate 37 is provided with a clamping mechanism 39, which includes a groove 391, a fixing rod 392 and a clamping rod 393. Two groups of grooves 391 are opened on the top of the docking plate 37, and a group of fixing rods 392 are fixedly installed on the inner walls of the two groups of grooves 391. A group of clamping rods 393 are movably sleeved on the two groups of fixing rods 392, and one end of the two groups of clamping rods 393 penetrates the docking plate 37 and the docking sleeve 38 and extends to the outside of the docking sleeve 38.

[0019] The clamping mechanism 39 also includes a first spring 394 and a lever 395. A group of first springs 394 is sleeved on the two groups of fixed rods 392. One end of the two groups of first springs 394 is fixedly connected to the corresponding clamping rod 393, and the other end of the two groups of first springs 394 is fixedly connected to the inner wall of the corresponding groove 391. A group of lever 395 is fixedly installed on the outer surface of the two groups of clamping rods 393.

[0020] The first mounting mechanism 3 also includes a first transmission groove 31, a first lead screw 32, a first movable block 33 and a first motor 310. The top of the table plate 2 is provided with a first transmission groove 31, and the first lead screw 32 is rotatably installed between the inner walls on both sides of the first transmission groove 31. The first movable block 33 that fits the inner wall of the first transmission groove 31 is threadedly installed on the first lead screw 32. The hydraulic rod 34 is fixedly installed on the top of the first movable block 33. The outer surface of one side of the table plate 2 is fixedly installed with a first motor 310, and the rotating shaft of the first motor 310 is transmission-connected to the first lead screw 32.

[0021] The second mounting mechanism 4 comprises a second transmission groove 41, a second lead screw 42, a second motor 43, a second movable block 44, a movable plate 45, a slide groove 46, a slider 47 and a plug-in mechanism 48. A second transmission groove 41 is provided on the top of the table plate 2, and a second lead screw 42 is rotatably installed between the inner walls on both sides of the second transmission groove 41. A second motor 43 is fixedly installed on the outer surface of the other side of the table plate 2, and a rotating shaft of the second motor 43 is transmission-connected with the second lead screw 42. A second movable block 44 that fits with the inner wall of the second transmission groove 41 is threadedly installed on the second lead screw 42. A movable plate 45 is fixedly installed on the top of the second movable block 44, a slide groove 46 is provided on one side of the movable plate 45, a slider 47 is slidably installed in the slide groove 46, a brake drum 9 is fixedly installed on the top of the slider 47, and a plug-in mechanism 48 is arranged on the front side of the movable plate 45.

[0022] The plug-in mechanism 48 includes an insert rod 481, a handle 482 and a second spring 483. The front side of the movable plate 45 is movably penetrated by the insert rod 481, and a slot is provided on the slider 47. One end of the insert rod 481 is inserted into the slot, and the other end of the insert rod 481 is fixedly installed with a handle 482. The second spring 483 is sleeved on the insert rod 481, one end of the second spring 483 is fixedly connected to the handle 482, and the other end of the second spring 483 is fixedly connected to the movable plate 45. Through the cooperation of the first mounting mechanism 3 and the second mounting mechanism 4, especially under the action of the clamping mechanism 39 and the plug-in mechanism 48, when replacing different brake assemblies 6 for testing and disassembling and assembling the brake drum 9, quick disassembly and assembly can be carried out, which saves time and effort, simplifies the test steps, and solves the problem that the clearance self-adjusting mechanism and the brake drum on some existing test benches are installed by bolts. The test of the clearance self-adjusting mechanism often requires testing of products of different batches, which results in time-consuming and labor-intensive frequent replacement of test parts, resulting in cumbersome testing, thereby improving the practicality of the test bench.

[0023] The lifting mechanism 5 includes a third transmission groove 51, a third motor 52, a bidirectional screw 53, a third movable block 54, a first U-shaped member 55, a second U-shaped member 56 and a support rod 57. The top of the base 1 is provided with a third transmission groove 51, a third motor 52 is fixedly installed on the outer surface of one side of the base 1, a bidirectional screw 53 is fixedly installed between the inner walls of both sides of the third transmission groove 51, the rotating shaft of the third motor 52 is transmission-connected with the bidirectional screw 53, two groups of third movable blocks 54 that fit the inner wall of the third transmission groove 51 are threadedly installed on the bidirectional screw 53, and the tops of the two groups of third movable blocks 54 are fixedly installed A group of first U-shaped parts 55 are installed, and two groups of second U-shaped parts 56 are fixedly installed on the bottom of the table 2. Two groups of support rods 57 are arranged between the base 1 and the table 2. One end of the two groups of support rods 57 are rotatably arranged on the corresponding first U-shaped parts 55, and the other ends of the two groups of support rods 57 are rotatably arranged on the corresponding second U-shaped parts 56. Through the lifting mechanism 5, the table 2 can be raised and lowered according to the test needs or the height of the test personnel, and the height of the test position can be adjusted, which is convenient for the test personnel to operate in a comfortable posture, thereby ensuring the use effect of the test bench and being conducive to the promotion and use of the test bench.

[0024] Working principle: Before conducting the test, first control the third motor 52 to start according to the required test height, drive the bidirectional screw 53 to rotate, and then drive the two groups of third movable blocks 54 to move closer or farther away from each other, and then drive the two groups of support rods 57 to swing and support the platform 2 to raise it or lower it. After adjusting the height of the platform 2, when the test begins, the brake assembly 6 causes the brake shoe 8 to continuously brake the brake drum 9 to simulate the braking process. The second motor 43 will start to drive the second screw 42 to rotate, control the second movable block 44 to slowly move the brake drum 9 on the movable plate 45 away from the brake shoe 8 to simulate the process of increasing the braking gap, and then the gap self-adjusting mechanism 7 will adjust the distance between the brake shoe 8 and the brake drum 9 in real time to simulate the adjustment of the braking gap, and obtain the data of the gap self-adjusting mechanism 7 during adjustment. When it is necessary to replace a different gap self-adjusting mechanism 7 for testing, control the free end of the hydraulic rod 34 to extend, drive the components on the connecting rod 36 to rise, and dial The two groups of levers 395 drive the two groups of clamping rods 393 to move into their respective grooves 391 and compress each first spring 394, so that the two groups of clamping rods 393 no longer clamp the docking sleeve 38, and then the docking sleeve 38 together with the brake assembly 6, the clearance self-adjusting mechanism 7 and the brake shoe 8 thereon can be removed and replaced with a docking sleeve 38 with a different brake assembly 6, the clearance self-adjusting mechanism 7 and the brake shoe 8 and re-clamped, and the first motor 310 can be controlled to start and drive the first lead screw 32 to rotate, drive the first movable block 33 together with the hydraulic rod 34 and the components on the connecting rod 36 to move, adjust the position according to the test mechanism of different models and sizes, and control the free end of the hydraulic rod 34 to shorten so that the brake assembly 6, the clearance self-adjusting mechanism 7 and the brake shoe 8 descend and reset, and when disassembling or replacing the brake drum 9, the handle 482 can be pulled to drive the insertion rod 481 to be pulled outward until it is disengaged from the slider 47, and the brake drum 9 can be slid out along the slide groove 46 through the slider 47, removed and replaced.

[0025] The embodiments of the present invention are described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Various changes can be made within the knowledge scope of ordinary technicians in the technical field without departing from the purpose of the present invention.

Claims

1. A drum brake clearance mechanism durability test bench, characterized in that: include: A base (1), with a table top (2) disposed directly above the base; A second mounting mechanism (4) is arranged on the platform (2), and the second mounting mechanism (4) is used to simulate a process of increasing the braking clearance; A lifting mechanism (5) is arranged between the base (1) and the table (2), and the lifting mechanism (5) is used to adjust the height of the test bench; A first mounting mechanism (3) is arranged on the table (2). The first mounting mechanism (3) comprises a hydraulic rod (34), a connecting block (35), a connecting rod (36), a docking plate (37), a docking sleeve (38) and a clamping mechanism (39). A hydraulic rod (34) is arranged on the top of the table (2). A connecting block (35) is fixedly mounted on the free end of the hydraulic rod (34). A connecting rod (36) is fixedly mounted on the top of the connecting block (35). A docking plate (37) is fixedly mounted on one end of the connecting rod (36). A docking sleeve (38) is sleeved on the docking plate (37). A brake assembly is fixedly mounted on the bottom of the docking sleeve (38). (6), a clearance self-adjusting mechanism (7) and a brake shoe (8) are provided on the brake assembly (6), a clamping mechanism (39) is provided on the docking plate (37), the clamping mechanism (39) comprises a groove (391), a fixing rod (392) and a clamping rod (393), two groups of grooves (391) are provided on the top of the docking plate (37), a group of fixing rods (392) are fixedly installed on the inner walls of the two groups of grooves (391), a group of clamping rods (393) are movably sleeved on the two groups of fixing rods (392), and one end of the two groups of clamping rods (393) passes through the docking plate (37) and the docking sleeve (38) and extends to the outside of the docking sleeve (38).

2. A drum brake clearance mechanism durability test bench according to claim 1, characterized in that: The clamping mechanism (39) further comprises a first spring (394) and a lever (395); a set of first springs (394) are sleeved on the two sets of fixed rods (392); one end of the two sets of first springs (394) are fixedly connected to the corresponding clamping rods (393); the other ends of the two sets of first springs (394) are fixedly connected to the inner wall of the corresponding groove (391); and a set of levers (395) are fixedly mounted on the outer surfaces of the two sets of clamping rods (393).

3. The drum brake clearance mechanism durability test bench according to claim 2, characterized in that: The first mounting mechanism (3) further comprises a first transmission groove (31), a first lead screw (32), a first movable block (33) and a first motor (310); the top of the table (2) is provided with a first transmission groove (31); a first lead screw (32) is rotatably mounted between two inner walls of the first transmission groove (31); a first movable block (33) is threadedly mounted on the first lead screw (32) and is in contact with the inner wall of the first transmission groove (31); a hydraulic rod (34) is fixedly mounted on the top of the first movable block (33); a first motor (310) is fixedly mounted on an outer surface of one side of the table (2); and a rotating shaft of the first motor (310) is transmission-connected to the first lead screw (32).

4. The drum brake clearance mechanism durability test bench according to claim 3, characterized in that: The second mounting mechanism (4) comprises a second transmission groove (41), a second lead screw (42), a second motor (43), a second movable block (44), a movable plate (45), a slide groove (46), a slider (47) and a plug-in mechanism (48); a second transmission groove (41) is provided on the top of the table (2); a second lead screw (42) is rotatably mounted between two inner walls of the second transmission groove (41); a second motor (43) is fixedly mounted on the outer surface of the other side of the table (2); and the second motor (43) is fixedly mounted on the outer surface of the other side of the table (2). 3) is transmission-connected to the second lead screw (42); a second movable block (44) is threadedly mounted on the second lead screw (42) and is in contact with the inner wall of the second transmission groove (41); a movable plate (45) is fixedly mounted on the top of the second movable block (44); a slide groove (46) is provided on one side of the movable plate (45); a slider (47) is slidably mounted in the slide groove (46); a brake drum (9) is fixedly mounted on the top of the slider (47); and a plug-in mechanism (48) is provided on the front side of the movable plate (45).

5. The drum brake clearance mechanism durability test bench according to claim 4, characterized in that: The plug-in mechanism (48) comprises an insert rod (481), a handle (482) and a second spring (483); the front side of the movable plate (45) is movably penetrated by the insert rod (481); a slot is provided on the slider (47); one end of the insert rod (481) is inserted into the slot; the other end of the insert rod (481) is fixedly mounted with the handle (482); the second spring (483) is sleeved on the insert rod (481); one end of the second spring (483) is fixedly connected to the handle (482); and the other end of the second spring (483) is fixedly connected to the movable plate (45).

6. The drum brake clearance mechanism durability test bench according to claim 5, characterized in that: The lifting mechanism (5) comprises a third transmission groove (51), a third motor (52), a bidirectional screw (53), a third movable block (54), a first U-shaped member (55), a second U-shaped member (56) and a support rod (57). The top of the base (1) is provided with a third transmission groove (51). The third motor (52) is fixedly mounted on an outer surface of one side of the base (1). The bidirectional screw (53) is fixedly mounted between inner walls of both sides of the third transmission groove (51). The rotating shaft of the third motor (52) is transmission-connected to the bidirectional screw (53). The bidirectional screw (53) is fixedly mounted between the inner walls of both sides of the third transmission groove (51). 3) Two groups of third movable blocks (54) are threadedly mounted on the upper surface and are fitted with the inner wall of the third transmission groove (51); a group of first U-shaped members (55) are fixedly mounted on the top of the two groups of third movable blocks (54); two groups of second U-shaped members (56) are fixedly mounted on the bottom of the table plate (2); two groups of support rods (57) are arranged between the base (1) and the table plate (2); one end of the two groups of support rods (57) are rotatably mounted on the corresponding first U-shaped members (55); and the other end of the two groups of support rods (57) are rotatably mounted on the corresponding second U-shaped members (56).

7. The drum brake clearance mechanism durability test bench according to claim 6, characterized in that: A control panel (10) is fixedly mounted on the top of the base (1).

8. The drum brake clearance mechanism durability test bench according to claim 7, characterized in that: At least two groups of guide rods (11) are fixedly mounted on the bottom of the platform (2), and each group of guide rods (11) is movably inserted into the base (1).

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