Test device and test method for bending load of drive axle housing

Abstract

The invention discloses a driving axle housing bending load test device, which comprises an outer cover body, and is characterized in that the outer cover body is slidably arranged at the outer side of a base along the longitudinal direction, and a temperature control assembly is arranged in the outer cover body; the connecting assembly is connected with the outer cover body and the force application assembly, and the outer cover body is changed along with the change of the position of the force application assembly; extension blocks protruding outwards are further symmetrically arranged on the top of the outer cover body, a check block is movably arranged on the support in the horizontal direction, and after the outer cover body moves to the position where the outer cover body makes contact with the support, the check block moves in the direction close to the extension blocks and stays at the position below the extension blocks so as to fix the outer cover body. According to the axle housing bending load testing device, the outer cover body is fixed in the state that the working area needs to be kept closed through the arrangement of the outer cover body, the temperature control assembly, the extension block and the check block, the temperature environment in the testing area is adjusted through the temperature control assembly, and therefore axle housing bending load testing can be carried out under different temperature conditions; and a real use environment is simulated.

Description

Technical Field

[0001] The invention belongs to the technical field of drive axle housings, and in particular relates to a test device and a test method for a drive axle housing bending load. Background Art

[0002] The vertical bending fatigue test of automobile drive axle housing is a test to examine the durability of automobile drive axle housing.

[0003] In the prior art, a Chinese patent application document with authorization publication number CN220986418U discloses a drive axle housing vertical bending fatigue test stand. When conducting a vertical bending fatigue test of the drive axle housing, the force on the axle housing comes from the eccentric connecting rod mechanism above. The eccentric connecting rod mechanism is driven by the rotation of the eccentric wheel at the top to cause up and down reciprocating motion. The eccentric wheel is driven by a motor assembly, and the movement frequency is controlled and determined by the motor assembly. The key power and transmission structure adopts mechanical type, avoiding the energy loss caused by frequent reversing of the servo hydraulic system.

[0004] However, the above technical solution can only be used for experiments in a natural temperature environment and cannot simulate the complex temperature environment conditions that the automobile drive axle housing may encounter during actual use. For example, the mechanical properties of the material may change significantly under working conditions in low-temperature areas or high-temperature areas. Therefore, its experimental results are difficult to fully reflect the bending load conditions of the axle housing under various climatic conditions. Summary of the Invention

[0005] The present invention aims to solve the problems in the prior art and proposes the following technical solutions:

[0006] The present invention provides a test device for driving axle housing bending load, comprising:

[0007] base;

[0008] Bracket;

[0009] A force-applying component is movably arranged on the bracket in the longitudinal direction;

[0010] An outer cover body, the outer cover body is longitudinally slidably arranged on the outside of the base, and a temperature control component is arranged inside the outer cover body;

[0011] a connecting assembly, wherein the connecting assembly connects the outer cover and the force-applying assembly, and the outer cover changes with the position of the force-applying assembly;

[0012] The top of the outer cover is symmetrically provided with an outwardly protruding extension block, and the bracket is movably provided with a stop block in the horizontal direction. After the outer cover moves to a position in contact with the bracket, the stop block moves toward the extension block and stays below the extension block to fix the outer cover.

[0013] As a preferred embodiment of the above technical solution, the force-applying assembly includes a force-applying head that is movable in the longitudinal direction and symmetrically arranged on the bracket;

[0014] The connecting assembly includes pulley 1 and pulley 2 symmetrically arranged on the bracket, pulley 1 is arranged at a position above the corresponding force-applying head, and pulley 2 is arranged at a position at two opposite sides of the corresponding outer cover. A traction rope is also wound around pulley 1 and pulley 2 on the same side, one end of the traction rope is fixedly connected to the force-applying head on the side, and the other end of the traction rope is fixedly connected to the outer cover.

[0015] As a preferred embodiment of the above technical solution, a support rod connecting the symmetrical force-applying heads is provided between the two;

[0016] The force-applying assembly further includes a first driving member, which is disposed on the bracket and has an output end connected to the support rod.

[0017] As a preferred embodiment of the above technical solution, the top of the base is further provided with a circle of extended edges protruding outwards, and the extended edges limit the outer cover from falling off the base during the upward sliding process.

[0018] As a preferred embodiment of the above technical solution, the temperature control assembly includes a heating component and a cooling component embedded on the relatively inner side walls of the outer cover.

[0019] The test method for the bending load of the drive axle housing adopts any one of the above-mentioned test devices for the bending load of the drive axle housing, and comprises the following steps:

[0020] S1. Axle housing installation: Stably install the axle housing to be tested on the top surface of the base;

[0021] S2. Start the force-applying assembly: The force-applying assembly applies pressure to the axle housing and causes the outer cover to start sliding upward and gradually cover the working area;

[0022] S3. Forming a closed environment: When the force-applying component contacts the axle housing and begins to apply pressure, the top of the outer cover contacts the bracket, together forming a closed working area;

[0023] S4. Fixing the outer cover: The stopper moves to the bottom of the extension block to block the outer cover so that it does not continue to move with the movement of the force applying head;

[0024] S5. Adjust the experimental temperature: Start the temperature control component to adjust the temperature environment in the test area;

[0025] S6. End of test: Remove the block, cancel the restriction on the outer cover, and restore the linkage between the outer cover and the force applying head, so that they are both reset to their initial state.

[0026] The beneficial effects of the present invention are:

[0027] The present invention provides an outer cover, and in combination with the arrangement of a temperature control assembly, an extension block, and a stopper, when the working area needs to be kept closed, the outer cover is fixed, and the temperature environment in the test area is adjusted by the temperature control assembly, thereby enabling the bending load test of the axle housing to be performed under different temperature conditions, simulating a real use environment.

[0028] The outer cover body and the force-applying component are linked by the setting of the connecting component, so that the outer cover body can be automatically opened or closed with the action of the force-applying component, without the need to set up a complex drive system and control logic for the outer cover body. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 The figure shows the overall state of the test device in the embodiment. Figure 1 ;

[0030] Figure 2 Shown is Figure 1 Schematic cross-sectional view in ;

[0031] Figure 3 The figure shows the overall state of the test device in the embodiment. Figure 2

[0032] Figure 4 Shown is Figure 3 Schematic cross-sectional view in ;

[0033] Figure 5 Shown is a schematic diagram of the temperature control assembly on the outer cover;

[0034] Figure numerals: 1, bridge housing; 10, base; 11, extension edge; 20, bracket; 30, force-applying assembly; 31, force-applying head; 32, driving member 1; 40, outer cover; 41, temperature control assembly; 411, heating member; 412, cooling member; 42, extension block; 50, connecting assembly; 51, pulley 1; 52, pulley 2; 53, traction rope; 61, driving member 2; 62, stop block; 70, clamping assembly. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below in conjunction with the embodiments.

[0036] Example

[0037] like Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 As shown, Figure 1 The figure shows the overall state of the test device in the embodiment. Figure 1 ; Figure 2 Shown is Figure 1 Schematic cross-sectional view in ; Figure 3 The figure shows the overall state of the test device in the embodiment. Figure 2 ; Figure 4 Shown is Figure 3 Schematic cross-sectional view in ;

[0038] The device includes:

[0039] Base 10;

[0040] Bracket 20;

[0041] A force applying assembly 30 is movably disposed on the bracket 20 along the longitudinal direction;

[0042] The outer cover 40 is slidably disposed on the outside of the base 10 in the longitudinal direction;

[0043] The connecting assembly 50 connects the outer cover 40 and the force-applying assembly 30 , and the outer cover 40 changes with the position of the force-applying assembly 30 ;

[0044] The temperature control component 41 is arranged inside the outer cover 40;

[0045] As the force-applying component 30 moves downward and approaches the bridge housing 1, it drives the outer cover 40 to move upward, and the outer cover 40 gradually covers the working area. When the force-applying component 30 contacts the bridge housing 1 and applies pressure to the bridge housing 1, the top of the outer cover 40 contacts the bracket 20, and the working area is enclosed by the outer cover 40 and the bracket 20. The temperature control component 41 can adjust the temperature in the working area.

[0046] Specifically, a clamping assembly 70 is provided on the top surface of the base 10, the top surface of the base 10 supports and places the bridge housing 1, and the force-applying assembly 30 applies pressure to the bridge housing 1 to bend it, thereby realizing the measurement of the bending load. The working area refers to the experimental area for the bending load measurement, that is, the area where the bridge housing 1 is installed on the top surface of the base 10 and the force-applying assembly 30 performs pressure-applying action.

[0047] The clamping assembly 70 is a clamping part in the prior art that can limit the two axial ends of the bridge housing 1. It can include a symmetrically arranged bearing seat and a rotary wheel installed on the bearing seat. The bearing seat is set to slide in the horizontal direction. After the bridge housing 1 is positioned and placed, the two axial ends of the bridge housing 1 are inserted into the rotary wheel to fix the position of the bridge housing 1.

[0048] The outer cover 40 is provided to play a protective role. During the experiment in which the bridge housing 1 is compressed, deformed, or even broken, the outer cover 40 can prevent splashes from escaping, provide physical isolation protection, and ensure the safety of the operator. In combination with the temperature control component 41, the temperature environment in the test area can be adjusted, so that the bending load test of the bridge housing 1 can be carried out under different temperature conditions to simulate the actual use environment.

[0049] The setting of the connecting component 50 realizes the linkage between the outer cover body 40 and the force applying component 30, so that the outer cover body 40 can be automatically opened or closed with the action of the force applying component 30, without the need to set a complex drive system and control logic for the outer cover body.

[0050] The front side of the outer cover 40 has a transparent observation window, which allows the operator to directly observe the state changes of the drive axle housing 1 during the experiment, including important information such as deformation and whether there are cracks.

[0051] Figure 1 、 Figure 2 The figure shows the initial state of the force-applying assembly 30 and the outer cover 40. At this time, the outer cover 40 does not affect the installation and fixation of the axle housing 1. Figure 3 、 Figure 4 The figure shows a state where the working area is enclosed by the outer cover 40 and the bracket 20 .

[0052] The force applying assembly 30 includes a force applying head 31 that is movable in the longitudinal direction and symmetrically arranged on the bracket 20;

[0053] The connecting assembly 50 includes a pulley 1 51 and a pulley 2 52 symmetrically arranged on the bracket 20. The pulley 1 51 is arranged above the corresponding force head 31, and the pulley 2 52 is arranged at the positions corresponding to the two opposite sides of the outer cover 40. A traction rope 53 is also wound around the pulley 1 51 and the pulley 2 52 on the same side. One end of the traction rope 53 is fixedly connected to the force head 31 on that side, and the other end is fixedly connected to the outer cover 40.

[0054] A support rod connecting the symmetrical force applying heads 31 is provided between the two;

[0055] The force applying assembly 30 further includes a driving member 32 , which is disposed on the bracket 20 and has an output end connected to the support rod.

[0056] By providing pulley 1 51, pulley 2 52 and the traction rope 53 passing through pulley 1 51 and pulley 2 52 in sequence, when the force applying head 31 moves downward, the traction rope 53 is pulled, driving the outer cover 40 to slide upward, thereby achieving a linkage effect in which the force applying head 31 moves downward while the outer cover 40 moves upward.

[0057] The driving member 32 can be a conventional component such as a cylinder or a hydraulic cylinder, which drives the support rod and the force applying head 31 to move longitudinally.

[0058] The top of the base 10 is also provided with a circle of extended edges 11 protruding outwards, and the extended edges 11 prevent the outer cover 40 from falling off the base 10 during the upward sliding process;

[0059] The extended edge 11 limits the range of movement of the outer cover 40 , and the outer cover 40 and the outer side wall of the base 10 are slidably matched to ensure the stability of the outer cover 40 during the sliding process.

[0060] The top of the outer cover 40 is also symmetrically provided with an outwardly protruding extension block 42, and the bracket 20 is provided with a stop block 62 that can be moved horizontally. After the outer cover 40 moves to a position in contact with the bracket 20, the stop block 62 moves toward the direction close to the extension block 42 and stays at a position below the extension block 42 to fix the position of the outer cover 40.

[0061] By providing the extension block 42 and the stopper 62, the outer cover 40 can be fixed in this position when the working area needs to be kept closed. If the outer cover 40 is not fixed, it will move downward and reset as the force applying head 31 subsequently moves upward and resets. However, the stopper 62 blocks the extension block 42, so that when the force applying head 31 moves upward, the outer cover 40 will not move downward and reset accordingly, but the working area will continue to remain closed. At this time, the temperature environment in the test area can be adjusted by activating the temperature control component 41.

[0062] A second driving member 61 is fixedly provided on both sides of the bracket 20. The output end of the second driving member 61 is fixedly connected to the stopper 62 on the side where it is located. The second driving member 61 drives the stopper 62 to move in the horizontal direction.

[0063] The second driving member 61 is an electric telescopic rod or a cylinder in the prior art, which plays the role of driving the stopper 62 to move.

[0064] like Figure 5 As shown, Figure 5 Shown is a schematic diagram of the temperature control assembly on the outer cover;

[0065] The temperature control assembly 41 includes a heating element 411 and a cooling element 412 embedded on opposite inner side walls of the outer cover 40;

[0066] The heating elements 411 are respectively a heating tube and a semiconductor refrigeration plate in the prior art. Specifically, the cooling end of the semiconductor refrigeration plate faces the inner side of the outer cover 40, and the heat dissipation end faces the outer side of the outer cover 40 for heat dissipation.

[0067] Working principle: After the axle housing 1 is stably installed on the base 10, the force-applying assembly 30 is started, the driving member 1 32 is actuated, pushing the support rod downward, and the driving member 1 32 drives the two symmetrically arranged force-applying heads 31 to move downward synchronously. At this time, the traction rope 53 passing around the pulley 1 51 and the pulley 2 52 is pulled, and the outer cover 40 slides upward accordingly. The outer cover 40 slides up along the outer wall of the base 10, and its top extension block 42 approaches the bracket 20. When the force-applying head 31 contacts the axle housing 1 and begins to apply pressure, the top of the outer cover 40 fits against the bracket 20. At this time, the working area is enclosed by the outer cover 40 and the bracket 20.

[0068] At the same time, the outer cover 40 can be selectively fixed: start the second driving member 61, the second driving member 61 drives the block 62 to move horizontally, and the block 62 is embedded under the extension block 42 to limit the position of the outer cover 40. At this time, the temperature control component 41 can also be turned on to adjust the temperature in the working area, so that the bridge housing 1 is subjected to the bending load test at the target temperature. The operator monitors the experimental status in real time through the transparent observation window on the front side of the outer cover 40.

[0069] Also included is a test method for the bending load of a drive axle housing, using the above-mentioned test device for the bending load of a drive axle housing, including the following steps:

[0070] S1. Axle housing installation: stably install the axle housing 1 to be tested on the top surface of the base 10;

[0071] S2. Start the force-applying assembly 30: The force-applying assembly 30 applies pressure to the axle housing 1 and causes the outer cover 40 to start sliding upward and gradually cover the working area;

[0072] S3. Forming a closed environment: When the force-applying assembly 30 contacts the axle housing 1 and begins to apply pressure, the top of the outer cover 40 contacts the bracket 20, and together they form a closed working area;

[0073] S4. Fix the outer cover 40: The stopper 62 moves to the position below the extension block 42 to block the outer cover 40 so that it does not continue to move with the movement of the force applying head 31;

[0074] S5. Adjusting the experimental temperature: starting the temperature control component 41 to adjust the temperature environment in the test area;

[0075] S6, detection end: remove the block 62, cancel the restriction of the outer cover 40, and the outer cover 40 and

[0076] The force applying heads 31 are restored to be linked to each other so as to be reset to their initial states.

[0077] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same.

Claims

1. The test device for the bending load of the drive axle housing is characterized by: include: Base (10); Bracket (20); A force-applying assembly (30), wherein the force-applying assembly (30) is movably disposed on the bracket (20) in the longitudinal direction; An outer cover (40), the outer cover (40) being slidably disposed on the outside of the base (10) in the longitudinal direction, and a temperature control component (41) being disposed inside the outer cover (40); a connecting assembly (50), wherein the connecting assembly (50) connects the outer cover (40) and the force-applying assembly (30), and the outer cover (40) changes with the position of the force-applying assembly (30); The top of the outer cover (40) is symmetrically provided with an outwardly protruding extension block (42), and the bracket (20) is movably provided with a stop block (62) in the horizontal direction. After the outer cover (40) moves to a position in contact with the bracket (20), the stop block (62) moves in a direction close to the extension block (42) and stays at a position below the extension block (42) to fix the outer cover (40).

2. The driving axle housing bending load test device according to claim 1, characterized in that: The force applying assembly (30) includes a force applying head (31) movable in the longitudinal direction and symmetrically arranged on the bracket (20); The connecting assembly (50) comprises a pulley 1 (51) and a pulley 2 (52) symmetrically arranged on the bracket (20), wherein the pulley 1 (51) is arranged above the corresponding force applying head (31), and the pulley 2 (52) is arranged at positions on two opposite sides of the corresponding outer cover (40), and a traction rope (53) is also wound around the pulley 1 (51) and the pulley 2 (52) on the same side, one end of the traction rope (53) is fixedly connected to the force applying head (31) on the same side, and the other end of the traction rope (53) is fixedly connected to the outer cover (40).

3. The driving axle housing bending load test device according to claim 2, characterized in that: A support rod connecting the symmetrical force applying heads (31) is provided between the two; The force-applying assembly (30) further includes a driving member (32), wherein the driving member (32) is arranged on the bracket (20) and an output end thereof is connected to the support rod.

4. The driving axle housing bending load test device according to claim 1, characterized in that: The top of the base (10) is also provided with a circle of extended edges (11) protruding outwards, and the extended edges (11) prevent the outer cover (40) from falling off the base (10) during the upward sliding process.

5. The driving axle housing bending load test device according to claim 1, characterized in that: The temperature control assembly (41) comprises a heating component (411) and a cooling component (412) embedded on opposite inner side walls of the outer cover (40).

6. A test method for the bending load of a drive axle housing, using the test device for the bending load of a drive axle housing according to any one of claims 1 to 5, characterized in that: The following steps are involved: S1. Axle housing installation: stably install the axle housing to be tested on the top surface of the base (10); S2. Starting the force-applying component: The force-applying component (30) applies pressure to the axle housing and simultaneously causes the outer cover (40) to start sliding upward and gradually cover the working area; S3, forming a closed environment: when the force-applying component (30) contacts the bridge housing and starts to apply pressure, the top end of the outer cover (40) contacts the bracket (20), and together they enclose and form a closed working area; S4, fixing the outer cover (40): the stopper (62) moves to the lower side of the extension block (42) to block and restrict the outer cover (40), so that the outer cover (40) does not continue to move along with the movement of the force applying head (31); S5. Adjusting the experimental temperature: starting the temperature control component (41) to adjust the temperature environment in the test area; S6, end of detection: remove the stopper (62), cancel the restriction on the outer cover (40), and restore the linkage between the outer cover (40) and the force applying head (31), so that both are reset to the initial state.

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