Expander function durability and slurry dust test bed

Abstract

The invention discloses an expander function durability and slurry dust test bed which comprises a table top, a brake cylinder arranged below the table top, an expander mounting seat arranged on the table top, an outer cover arranged on the table top and two function durability test mechanisms arranged on the table top. The power input end of the expander is connected with the brake cylinder; the outer cover is arranged outside the expander mounting seat in a covering manner, slurry and / or dust are / is arranged in the outer cover, and a plurality of air holes for introducing air into the outer cover are formed in the side surface of the outer cover; the function durability testing mechanism comprises a guide rail, a driven block and an adjusting block, the driven block and the adjusting block are arranged on the guide rail in a sliding mode, and the adjusting block is provided with a displacement sensor corresponding to the driven block and connected with an adjusting driving mechanism. The device is simple in structure, easy and convenient to operate, low in cost and high in adaptability, reliable technical support is provided for research and development design, quality detection and performance improvement of the expander, and then improvement of the overall safety and durability of an automobile braking system is promoted.

Description

Technical Field

[0001] This invention relates to the field of brake expander technology, specifically to expander functional durability and mud dust test bench. Background Technology

[0002] As a core actuator in a vehicle's braking system, the brake diffuser's performance stability directly determines the reliability of braking and driving safety. During braking, this component repeatedly expands and retracts, enduring alternating loads, friction and wear, and high temperatures over extended periods. Furthermore, road dust, mud, and other impurities generated during vehicle operation can easily intrude into the component, leading to problems such as expansion jamming, seal failure, and shortened lifespan. In addition, to compensate for friction pad wear, the diffuser needs to automatically adjust the brake clearance; the stability of this function also affects driving safety. Failure to automatically compensate for brake clearance can lead to serious safety hazards such as brake failure. Therefore, precise testing of the diffuser's functional durability and adaptability to mud and dust environments is a crucial step in ensuring the quality of the automotive braking system.

[0003] Existing equipment testing methods often suffer from drawbacks such as limited operating conditions, insufficient accuracy, poor versatility, and low automation. Therefore, there is an urgent need to develop a testing device that can simulate actual operating conditions, integrate functional durability and dust environment testing, and simultaneously test gap compensation functions. Summary of the Invention

[0004] The purpose of this invention is to provide an expander functional durability and mud dust test bench to solve the problems existing in the prior art.

[0005] To address the shortcomings of existing technologies, the present invention provides the following technical solution: an expander functional durability and mud dust test bench, comprising a bench surface, a brake cylinder disposed below the bench surface, an expander mounting base disposed on the bench surface, an outer cover disposed on the bench surface, and two functional durability testing mechanisms disposed on the bench surface.

[0006] The expander is installed in the expander mounting base, and the power input end of the expander is connected to the brake cylinder;

[0007] The outer cover is installed outside the expander mounting base, and the outer cover contains mud and / or dust. The side of the outer cover is provided with several air holes for ventilation into the outer cover.

[0008] The functional durability testing mechanism includes a guide rail and a passive block and an adjustment block that are slidably mounted on the guide rail. The passive block has a connector on the side near the expander that matches the expansion arm of the expander. A reset spring is provided between the passive block and the adjustment block. The adjustment block is provided with a displacement sensor corresponding to the passive block. The adjustment block is connected to an adjustment drive mechanism, which can adjust the position of the adjustment block on the guide rail.

[0009] Preferably, the passive block has a connecting post on the side near the expander, and the connector is detachably inserted into the front end of the connecting post.

[0010] Preferably, the connector is rotatable about its axis.

[0011] Preferably, the connector is provided with a pair of arc grooves.

[0012] Preferably, the adjustment drive mechanism includes a geared motor and a lead screw. The output end of the geared motor is connected to the lead screw, and the adjustment block is threadedly matched with the lead screw, so that when the geared motor drives the lead screw to rotate, the adjustment block can slide along the guide rail.

[0013] Preferably, the guide rail, passive block, adjusting block, and lead screw are provided with protective covers.

[0014] Preferably, the end of the lead screw near the geared motor is provided with a support plate.

[0015] Preferably, the height of the passive block is higher than that of the adjustment block, and the displacement sensor is disposed on the top of the adjustment block, with the displacement sensor corresponding to the side of the passive block.

[0016] Preferably, a mounting plate is connected to the bottom of the platform via several connecting rods, and the brake cylinder is mounted below the mounting plate.

[0017] Preferably, the outer cover has a viewing window on its side.

[0018] Compared with the prior art, the beneficial effects of this invention are as follows: This invention simulates the vehicle braking system and driving environment to achieve functional durability and mud and dust test testing of the expander. Furthermore, it achieves real-time detection of the expander's automatic gap compensation function by adjusting the gap between the adjusting block and the passive block. This invention has a simple structure, is easy to operate, has low cost, and high adaptability, providing reliable technical support for the research and development, quality testing, and performance improvement of the expander, thereby contributing to the improvement of the overall safety and durability of the automotive braking system. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0020] Figure 2 This is a partial disassembly diagram of the present invention.

[0021] Figure 3 This is a plan view of the internal structure of the present invention.

[0022] Figure 4 This is a schematic diagram of the functional durability testing mechanism in this invention.

[0023] Figure 5 This is a partial cross-sectional view of the passive block and the adjustment block in this invention.

[0024] Figure 6 This is a schematic diagram of the connector structure in this invention. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below through embodiments.

[0026] Example: Expansioner functional durability and mud dust test bench, reference Figure 1-6 The device includes a cabinet 1 and a table 2 on the surface of the cabinet. The table 2 is provided with an expander mounting base 3 and two sets of functional durability testing mechanisms symmetrically arranged on both sides of the expander mounting base 3. The expander mounting base 3 is I-shaped and fixed to the table. A threaded through hole is opened in the middle, penetrating the table from top to bottom. The expander 4 to be tested is threadedly fixed in the expander mounting base 3. In this embodiment, a common wedge expander is used as an example. A brake cylinder 5 is provided in the cabinet below the table. The output end of the brake cylinder 5 is connected to the power input end of the expander 4 to simulate the vehicle braking input action.

[0027] In the above structure, the bottom surface of the platform 2 is provided with four connecting rods 6, the bottom end of the connecting rods 6 is fixed with a mounting plate 7, and the brake cylinder 5 is fixedly installed below the mounting plate 7.

[0028] The functional durability testing mechanism includes a guide rail 8 and a passive block 9 and an adjustment block 10 that are slidably disposed on the guide rail 8. The passive block 9 is connected to the expansion arm of the expander 4. The gap between the passive block 9 and the adjustment block 10 is simulated as the braking gap. The position of the adjustment block 10 is adjusted to simulate the increase of the braking gap during vehicle use. The adjustment of the adjustment block 10 is achieved by adjusting the drive mechanism.

[0029] Specifically, the passive block 9 has a connecting post 11 on the side near the expander 4. The outer end of the connecting post 11 has a socket, into which a connector 12 is detachably inserted. The end face of the connector 12 has a straight protrusion, the shape of which matches the expansion arm of the expander 4, facilitating insertion into the groove of the expansion arm. The connector 12 can rotate around its axis to adjust its angle to match the expansion arm. Furthermore, the end face of the connector 12 has two symmetrical arc grooves 13, facilitating rotation of the connector using a specific tool. The detachable connection method allows for the replacement of different types and specifications of connectors for testing different types of expanders.

[0030] The adjustment drive mechanism includes a geared motor 14 and a lead screw 15. The output end of the geared motor 14 is connected to the lead screw 15 through a coupling 16. The adjusting block 10 is threadedly matched with the lead screw 15. When the geared motor 14 drives the lead screw 15 to rotate, the adjusting block 10 can slide along the guide rail 8, thereby realizing the position adjustment of the adjusting block 10.

[0031] In the above structure, the passive block 9 is provided with a through hole through which the lead screw 15 passes, and the through hole is a stepped hole. A return spring 17 is provided inside. One end of the return spring 17 abuts against the stepped surface of the stepped hole, and the other end abuts against the adjusting block 10, which is used to reset the passive block when the braking force is released.

[0032] In this embodiment, the height of the passive block 9 is higher than that of the adjustment block 10. The top of the adjustment block 10 is provided with a displacement sensor 19, which points to the back side of the passive block 9. The displacement sensor 19 is used to monitor the movement of the passive block 9 when the brake clearance changes, thereby determining whether the brake clearance adjustment function of the expander is normal.

[0033] In this embodiment, an outer cover 20 is also provided on the platform to cover the expander mounting base 3. The space inside the outer cover contains mud and dust. Several air holes are provided on the opposite bottom sides of the outer cover 20 for ventilation into the outer cover. High-pressure gas blown in through the air holes can blow away the mud and dust, filling the space inside the outer cover and covering the expander to simulate harsh working conditions. The front and rear sides of the outer cover 20 are also provided with viewing windows 21 to facilitate the operator's observation of the internal environment. In addition, in this embodiment, the guide rail 8, passive block 9, and adjusting block 10 are also provided with protective covers 22 to prevent mud and dust from affecting components such as the lead screw and displacement sensor.

[0034] In this embodiment, one end of the lead screw 15 is mounted on the side of the protective cover 22 via a bearing, and the other end is mounted on the side of the outer cover 20 via a bearing. A support plate 23 is provided at a corresponding position on the side of the outer cover. The support plate 23 is used to bear the force applied to the lead screw by the thrust of the passive block on the adjusting block during simulated braking.

[0035] In this embodiment, the expander 4 is first installed and fixed to the expander mounting base 3. Then, the power input end of the expander 4 is connected to the output end of the brake cylinder 5. Next, the connectors 12 on both sides are inserted into the corresponding expansion arm end grooves. Then, the position of the adjusting block 10 is adjusted by adjusting the drive mechanism so that the gap between it and the passive block 9 reaches the normal braking gap. Once ready, high-pressure gas can be introduced for environmental simulation, while braking simulation is performed via brake cylinder 5: when brake cylinder 5 inputs braking force upward, the wedge mechanism inside the wedge expander pushes the expansion arm to both sides, thereby pushing the passive block 9 to move outward until it contacts the adjustment block 10. When the braking force disappears, the expansion arm retracts, and the passive block 9 returns to its original position under the action of the return spring 17. During this process, the data transmitted by the displacement sensor 19 can be used to determine whether the expander 4 can maintain normal operation. After a certain number of braking simulations, the adjustment mechanism is adjusted to control the adjustment block 10 on one or both sides to move backward a certain distance, thereby simulating the increase in braking clearance caused by friction pad wear. Then, braking simulation continues, and the data transmitted by the displacement sensor 19 is used to determine whether the expander can automatically adjust the braking clearance normally, while monitoring whether the braking clearance is increasing or decreasing.

[0036] The above embodiments are only for illustrating the technical concept and features of the present invention, and are intended to enable those skilled in the art to understand the content of the present invention and implement it accordingly. They should not be construed as limiting the scope of protection of the present invention. All equivalent changes or modifications made in accordance with the spirit and essence of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A test bench for the functional durability and mud dust testing of an expander, characterized in that, It includes a platform, a brake cylinder located below the platform, an expander mounting base located on the platform, an outer cover located on the platform, and two functional durability testing mechanisms located on the platform. The expander is installed in the expander mounting base, and the power input end of the expander is connected to the brake cylinder; The outer cover is installed outside the expander mounting base, and the outer cover contains mud and / or dust. The side of the outer cover is provided with several air holes for ventilation into the outer cover. The functional durability testing mechanism includes a guide rail and a passive block and an adjustment block that are slidably mounted on the guide rail. The passive block has a connector on the side near the expander that matches the expansion arm of the expander. A reset spring is provided between the passive block and the adjustment block. The adjustment block is provided with a displacement sensor corresponding to the passive block. The adjustment block is connected to an adjustment drive mechanism, which can adjust the position of the adjustment block on the guide rail.

2. The expander functional durability and mud dust test bench according to claim 1, characterized in that, The passive block has a connecting post on the side near the expander, and the connector is detachably inserted into the front end of the connecting post.

3. The expander functional durability and mud dust test bench according to claim 2, characterized in that, The connector is rotatable about its axis.

4. The expander functional durability and mud dust test bench according to claim 3, characterized in that, The connector is provided with a pair of arc grooves.

5. The expander functional durability and mud dust test bench according to claim 1, characterized in that, The adjustment drive mechanism includes a geared motor and a lead screw. The output end of the geared motor is connected to the lead screw, and the adjustment block is threadedly matched with the lead screw, so that when the geared motor drives the lead screw to rotate, the adjustment block can slide along the guide rail.

6. The expander functional durability and mud dust test bench according to claim 5, characterized in that, The guide rail, passive block, adjusting block, and lead screw are all equipped with protective covers.

7. The expander functional durability and mud dust test bench according to claim 6, characterized in that, The lead screw is provided with a support plate at the end near the geared motor.

8. The expander functional durability and mud dust test bench according to claim 1, characterized in that, The passive block is higher than the adjustment block, and the displacement sensor is located on the top of the adjustment block, with the displacement sensor corresponding to the side of the passive block.

9. The expander functional durability and mud dust test bench according to claim 1, characterized in that, A mounting plate is connected to the bottom of the platform via several connecting rods, and the brake cylinder is mounted below the mounting plate.

10. The expander functional durability and mud dust test bench according to claim 1, characterized in that, The outer cover has a viewing window on its side.

Images