One-way bench test platform

Abstract

The utility model discloses a one -way test platform of trestle, including U type seat, the U type seat upper end is equipped with crossbeam, the U type seat middle part forms the chamber, the chamber bottom surface middle part is equipped with the fixed platform, the fixed platform top is equipped with the fixed block for fixing the middle part of leaf spring, the crossbeam bottom is equipped with with the leaf spring both ends respectively corresponding and can respectively independent up and down activity's first pressure spare and second pressure spare in the chamber, first pressure spare and second pressure spare are located fixed leaf spring both ends respectively above. The utility model has can to leaf spring both ends carry out synchronous and same frequency, synchronous and different frequency, asynchronous and same frequency and asynchronous and different frequency's multiple vertical load test, increase test comprehensive nature etc.

Description

Technical Field

[0001] This utility model relates to a test platform, specifically a unidirectional bench test platform. Background Technology

[0002] A leaf spring is a spring made of a single steel plate or multiple steel plates stacked together. In the existing technology, automotive leaf spring testing usually involves vertical load testing and other tests according to industry standards.

[0003] Patent application CN104865053B discloses an automotive leaf spring testing device and its testing method. The automotive leaf spring testing device includes: a base; a gantry frame including a gantry frame support and a gantry frame crossbeam; an actuator for driving the automotive leaf spring to move up and down, the actuator having a force sensor for collecting force signals from the automotive leaf spring and a displacement sensor for collecting deformation signals from the automotive leaf spring; a first roller and a second roller, mounted on the base in a manner that allows relative left-right movement, the first roller supporting the left end of the automotive leaf spring and the second roller supporting the right end of the automotive leaf spring; and a control system for controlling the actuator to drive the automotive leaf spring to move up and down.

[0004] In the existing technology, the leaf spring is deformed by the force applied to the middle of the leaf spring to conduct the leaf spring test. However, it is not possible to conduct multiple tests on the asynchronous and different frequencies of the forces applied to the two sides of the leaf spring. This has limitations in the test and the test of the leaf spring is not comprehensive enough. Utility Model Content

[0005] The purpose of this utility model is to provide a unidirectional bench test platform, which solves the problems of limitations and incompleteness of existing technologies.

[0006] The above-mentioned technical objective of this utility model is mainly achieved through the following technical solution: a unidirectional bench test platform, including a U-shaped seat, a crossbeam at the upper end of the U-shaped seat, a cavity formed in the middle of the U-shaped seat, a fixed platform in the middle of the bottom surface of the cavity, a fixing block for fixing the middle of the leaf spring at the top of the fixed platform, and a first pressing member and a second pressing member corresponding to the two ends of the leaf spring and capable of moving up and down independently at the bottom of the crossbeam and corresponding to the two ends of the leaf spring, respectively. The first pressing member and the second pressing member are respectively located above the two ends of the fixed leaf spring.

[0007] As a further preferred technical solution of this utility model, the ends of the first pressing member and the second pressing member are respectively provided with a rotatable first roller and a second roller, and the axial direction of the first roller and the second roller is perpendicular to the width direction of the leaf spring.

[0008] As a further preferred technical solution of this utility model, the bottom of the crossbeam is provided with a first hydraulic cylinder and a second hydraulic cylinder, and the output shafts of the first hydraulic cylinder and the second hydraulic cylinder are respectively connected downward to the first pressing component and the second pressing component.

[0009] As a further preferred technical solution of this utility model; the top of the first hydraulic cylinder and the second hydraulic cylinder are respectively provided with a first connecting block and a second connecting block, and the bottom of the crossbeam is fixed with a first fixing block and a second fixing block for fixing the first connecting block and the second connecting block and cooperating with the first connecting block and the second connecting block by bolts.

[0010] As a further preferred technical solution of this utility model, a horizontally arranged spacer bar is provided between the first hydraulic cylinder and the second hydraulic cylinder.

[0011] As a further preferred technical solution of this utility model; both sides of the top of the fixing platform are provided with protrusions, both sides of the top of the fixing block are provided with mounting parts corresponding to the positions of the protrusions, and the fixing block is provided with a U-shaped fixing ring that bypasses the mounting parts and passes downward through the protrusions to connect with the fastening nut.

[0012] As a further preferred technical solution of this utility model; the U-shaped fixing ring includes a fixing section located above the fixing platform and cooperating with the fixing block and a connecting section passing downward through the protrusion. The outer wall of the connecting section is provided with an external thread, and the end of the connecting section is provided with an extension cylinder that is threadedly engaged with the external thread. The extension cylinder can pass through the protrusion and the end is provided with a threaded section that can be threadedly connected with a fastening nut.

[0013] As a further preferred technical solution of this utility model; the fixed section includes a first straight section and a second straight section arranged symmetrically, each of the first straight section and the second straight section is provided with a limiting cavity in the middle, and a connecting column is provided coaxially between the first straight section and the second straight section. Each end of the connecting column is provided with a connecting cylinder extending to the inside of the limiting cavity and cooperating with the limiting cavity, and a telescopic spring is provided inside the connecting cylinder and connected to the inner wall of the limiting cavity.

[0014] Therefore, this utility model has the characteristics of being able to perform various vertical load tests on both ends of the leaf spring simultaneously and at the same frequency, simultaneously and at different frequencies, asynchronously and at the same frequency, and asynchronously and at different frequencies, thereby increasing the comprehensiveness of the test. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model.

[0016] Figure 2 This is a schematic diagram of the U-shaped fixing ring in this utility model;

[0017] Figure 3 yes Figure 2 A structural sectional view of the fixed segment in the diagram. Detailed Implementation

[0018] The technical solution of this utility model will be further described in detail below through embodiments and in conjunction with the accompanying drawings.

[0019] like Figure 1 As shown, a unidirectional bench test platform includes a U-shaped base 1. A crossbeam 2 is provided at the upper end of the U-shaped base 1. The two ends of the crossbeam 2 are movably connected to the two ends of the U-shaped base 1. The crossbeam 2 can move up and down and be fixed to allow adjustment of its height according to the size of the leaf spring. This ensures that the first pressing member 21 and the second pressing member 22 at the bottom of the crossbeam 2 match the structure of the leaf spring. A chamber 11 is formed in the middle of the U-shaped base 1. A fixed platform 31 is provided in the middle of the bottom surface of the chamber 11. A fixing block 32 for fixing the middle part of the leaf spring is provided on the top of the fixed platform 31. The fixed platform 31 and the fixing block 32 cooperate to clamp and fix the middle part of the leaf spring to simulate the actual vehicle loading layout and increase the realism of the test. The two ends of the leaf spring are fixed to the top surface of the fixed platform 31 with an upward-curving shape. The bottom of the crossbeam 2, corresponding to the two ends of the leaf spring, has a first pressing member 21 and a second pressing member 22 that can move up and down independently, respectively. The first pressing member 21 and the second pressing member 22 are respectively located above the fixed ends of the leaf spring. At the start of the test, the first pressing member 21 and the second pressing member can be driven to perform synchronous and same frequency, synchronous and different frequency, asynchronous and same frequency, and asynchronous and different frequency actions on both ends of the leaf spring, so as to realize multiple test procedures, thereby increasing the number of tests and procedures for the leaf spring and improving the comprehensiveness of the test. A horizontally arranged spacer rod 29 is provided between the first hydraulic cylinder 25 and the second hydraulic cylinder 26. The spacer rod 29 is used to help determine the distance between the first hydraulic cylinder 25 and the second hydraulic cylinder 26 when installing the first hydraulic cylinder 25 and the second hydraulic cylinder 26, so as to match leaf springs of different lengths and ensure that the first pressing member 21 and the second pressing member 22 accurately place the test on both ends of the leaf spring.

[0020] like Figure 1As shown, the ends of the first pressing member 21 and the second pressing member 22 are respectively provided with rotatable first rollers 23 and second rollers 24. The axial directions of the first rollers 23 and second rollers 24 are perpendicular to the width direction of the leaf spring. The first rollers 23 and second rollers 24 are provided to increase the rolling properties of the ends of the first pressing member 21 and the second pressing member 22, so that when the first pressing member 21 and the second pressing member 22 act on the two ends of the leaf spring, they can roll with the deformation of the ends of the leaf spring, avoiding damage to the ends of the leaf spring, and increasing the smoothness of the action of the first pressing member 21 and the second pressing member 22 on the two ends of the leaf spring. The bottom of the crossbeam 2 is provided with a first hydraulic cylinder 25 and a second hydraulic cylinder 26. The output shafts of the first hydraulic cylinder 25 and the second hydraulic cylinder 26 are respectively connected downward to the first pressing member 21 and the second pressing member 22. The first pressing member 21 and the second pressing member 22 are independently driven by the first hydraulic cylinder 25 and the second hydraulic cylinder 26, thereby realizing the first The independent operation of the first pressure component 21 and the second pressure component 22 can meet various test procedures and increase the comprehensiveness of the test. The top of the first hydraulic cylinder 25 and the second hydraulic cylinder 26 are respectively provided with a first connecting block 251 and a second connecting block 261. The bottom of the crossbeam 2 is fixed with a first fixing block 27 and a second fixing block 28 for fixing the first connecting block 251 and the second connecting block 261 and cooperating with the first connecting block 251 and the second connecting block 261. The first fixing block 27 and the second fixing block 28 can be fastened to the bottom of the crossbeam 2 with bolts, so that the first hydraulic cylinder 25 and the second hydraulic cylinder 26 can be fixed by the first connecting block 251 and the second connecting block 261, which strengthens the fixing stability and reliability of the first hydraulic cylinder 25 and the second hydraulic cylinder 26, and is easy to disassemble and assemble, so as to adjust the distance between the first hydraulic cylinder 25 and the second hydraulic cylinder 26 according to the leaf spring of different lengths, thereby increasing the applicability.

[0021] like Figure 1 As shown, the top of the fixed platform 31 is provided with protrusions 311 on both sides, and the top of the fixed block 32 is provided with mounting parts 321 corresponding to the positions of the protrusions 311 on both sides. The fixed block 32 is provided with a U-shaped fixing ring 33 that passes around the mounting part 321 and downward through the protrusion 311 and connects with the fastening nut 331. The two ends of the U-shaped fixing ring 33 pass through the protrusion 311 and are connected and fixed with the fastening nut 331. The bottom of the fixed platform 31 is fixed to the U-shaped seat 1 by bolts. The top surface of the fixed platform 3 cooperates with the leaf spring. The two ends of the U-shaped fixing ring 33 pass downward around the mounting part 321 of the fixed block 32 and pass through the protrusion 311. The top of the U-shaped fixing ring 33 is pressed against the top surface of the fixed block 32. The two ends of the U-shaped fixing ring 33 are provided with threads to connect with the fastening nut 331 and lock at the bottom of the protrusion (311), thereby realizing the fastening of the middle part of the leaf spring to simulate the real vehicle mounting layout of the leaf spring and ensure the closeness of the test to reality.

[0022] like Figure 1-2As shown, the U-shaped retaining ring 33 includes a retaining section 332 located above the retaining platform 31 and cooperating with the retaining block 32, and a connecting section 333 passing downward through the protrusion 311. The outer wall of the connecting section 333 is provided with an external thread 334. When the thickness of the leaf spring is appropriate and the length of the connecting section 333 is sufficient to pass through the protrusion 311, the end of the connecting section 333 directly passes through the protrusion 311 and connects with the fastening nut 331. The end of the connecting section 333 is provided with an extension cylinder 34 that is threadedly engaged with the external thread 334. The extension cylinder 34 can pass through the protrusion 311 and its end is provided with a threaded section 341 that can be threadedly connected to the fastening nut 331. When the thickness of the leaf spring is large and the length of the connecting section 333 is insufficient to pass through the protrusion 311, the extension cylinder 34 can be threadedly connected to the end of the connecting section 333 to extend the connecting section 333. After the threaded section 341 at the end of the extension cylinder 34 passes through the protrusion 311, it can be connected to the fastening nut 331, thereby adapting to leaf springs of different thicknesses and effectively fixing leaf springs of different thicknesses.

[0023] like Figure 2-3 As shown, the fixing section 332 includes a first straight section 335 and a second straight section 336 symmetrically arranged. Each of the first straight section 335 and the second straight section 336 has a limiting cavity 337 in its middle. A connecting post 35 is coaxially arranged between the first straight section 335 and the second straight section 336. Both ends of the connecting post 35 have connecting cylinders 351 extending into and cooperating with the limiting cavity 337. The connecting cylinders 351 contain a telescopic spring 352 connected to the inner wall of the limiting cavity 337. The connecting post 35 is located between the first straight section 335 and the second straight section 336, and is coaxially connected to the first straight section 335 and the second straight section 336 respectively through the connecting cylinders 351 at both ends. When fixing leaf springs of different widths, the ends of the first straight section 335 and the second straight section 336 can be separated from the ends of the connecting post 35, and the connection is maintained by the connecting cylinders 351. The clamping and fixing of the fixing block 32, along with the extension spring 352, allows for the constant tightening of the first straight section 335 and the second straight section 336. This ensures that the first straight section 335 and the second straight section 336 remain in contact with the side wall of the leaf spring under the action of the extension spring 352, maintaining a limiting effect. After the fixing is removed, the first straight section 335 and the second straight section 336 automatically return to their original position under the action of the extension spring 352 and maintain their connection with the connecting post 35, thus maintaining the integrity of the U-shaped fixing ring 33. Simultaneously, when the leaf spring is clamped, the U-shaped fixing ring 33 is locked downwards as a whole, and the fixing section 332 is pressed against the fixing block 32. The mutual clamping between the first straight section 335 and the second straight section 336 and the fixing block 32 further prevents axial loosening of the first straight section 335 and the second straight section 336, enhancing the structural stability of the first straight section 335 and the second straight section 336.

[0024] The above embodiments are preferred implementations of this utility model. In addition, this utility model can also be implemented in other ways. Any obvious substitutions without departing from the concept of this technical solution are within the protection scope of this utility model.

Claims

1. A unidirectional bench test platform, comprising a U-shaped base (1), characterized in that: The upper end of the U-shaped seat (1) is provided with a crossbeam (2), and a cavity (11) is formed in the middle of the U-shaped seat (1). A fixed platform (31) is provided in the middle of the bottom surface of the cavity (11). A fixing block (32) for fixing the middle part of the leaf spring is provided on the top of the fixed platform (31). The bottom of the crossbeam (2) corresponds to the first pressing member (21) and the second pressing member (22) in the cavity (11) and are respectively corresponding to the two ends of the leaf spring and can move up and down independently. The first pressing member (21) and the second pressing member (22) are respectively located above the two ends of the fixed leaf spring.

2. The unidirectional bench test platform according to claim 1, characterized in that: The ends of the first pressing member (21) and the second pressing member (22) are respectively provided with a rotatable first roller (23) and a second roller (24), and the axial direction of the first roller (23) and the second roller (24) is perpendicular to the width direction of the leaf spring.

3. The unidirectional bench test platform according to claim 2, characterized in that: The bottom of the crossbeam (2) is provided with a first hydraulic cylinder (25) and a second hydraulic cylinder (26), and the output shafts of the first hydraulic cylinder (25) and the second hydraulic cylinder (26) are respectively connected downward to the first pressure member (21) and the second pressure member (22).

4. The unidirectional bench test platform according to claim 3, characterized in that: The first hydraulic cylinder (25) and the second hydraulic cylinder (26) are respectively provided with a first connecting block (251) and a second connecting block (261) at their tops. The bottom of the crossbeam (2) is fixed with a first fixing block (27) and a second fixing block (28) for fixing the first connecting block (251) and the second connecting block (261) and cooperating with the first connecting block (251) and the second connecting block (261).

5. The unidirectional bench test platform according to claim 2, characterized in that: A transversely arranged spacer bar (29) is provided between the first hydraulic cylinder (25) and the second hydraulic cylinder (26).

6. The unidirectional bench test platform according to claim 1, characterized in that: The top two sides of the fixed platform (31) are provided with protrusions (311), and the top two sides of the fixed block (32) are provided with mounting parts (321) corresponding to the positions of the protrusions (311). The fixed block (32) is provided with a U-shaped fixing ring (33) that bypasses the mounting part (321) and passes downward through the protrusion (311) and connects with the fastening nut (331).

7. The unidirectional bench test platform according to claim 6, characterized in that: The U-shaped retaining ring (33) includes a retaining section (332) located above the retaining platform (31) and cooperating with the retaining block (32) and a connecting section (333) passing downward through the protrusion (311). The outer wall of the connecting section (333) is provided with an external thread (334). The end of the connecting section (333) is provided with an extension cylinder (34) that is threadedly engaged with the external thread (334). The extension cylinder (34) can pass through the protrusion (311) and the end is provided with a threaded section (341) that can be threadedly connected with the fastening nut (331).

8. The unidirectional bench test platform according to claim 7, characterized in that: The fixed section (332) includes a first straight section (335) and a second straight section (336) arranged symmetrically. Each of the first straight section (335) and the second straight section (336) is provided with a limiting cavity (337) in the middle. A connecting post (35) is provided coaxially between the first straight section (335) and the second straight section (336). Both ends of the connecting post (35) are provided with connecting cylinders (351) extending to the inside of the limiting cavity (337) and cooperating with the limiting cavity (337). The connecting cylinder (351) is provided with a telescopic spring (352) connected to the inner wall of the limiting cavity (337).

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