Shearing strength testing equipment for O-shaped ring of small pressing block assembly
By designing a shear strength testing equipment for O-rings with small assemblies of compacted compacts, the problem of difficulty in evaluating the shear fatigue performance of O-rings in the prior art is solved, and the fatigue performance at the O-ring parts level is achieved Verification reduces verification costs and cycles.
Patent Information
- Application Number
- CN202420739869.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-11
- Publication Date
- 2025-02-11
- Estimated Expiration
- 2034-04-11
AI Technical Summary
The prior art is difficult to effectively evaluate the shear fatigue performance under different O-ring compression amounts, resulting in the need of system-level durability tests, wasted samples, high costs and long verification cycles.
A shear strength testing equipment for small assemblies of compact blocks is designed, including components such as base plate, bracket, support seat, press plate, guide block, force sensor, pressure gland, adjustment bolt, fixing bolt and other components, through these components Combination and adjustment to achieve fatigue performance verification at the O-ring component level.
It realizes fatigue performance verification at the O-ring component level, without the need to destroy the steering machine assembly sample, reduces verification cost and cycle, and the equipment can be repeatedly adjusted and reused, making the O-ring easy to disassemble and assemble, and has high adaptability.
Smart Images
Figure CN222461235U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of detection equipment, in particular to a shear strength testing device for a small assembly O-ring of a pressing block. Background Art
[0002] The most common structure for the gear rack meshing structure of the steering gear is the pressure block mechanism. The pressure block subassembly is equipped with an end face O-ring to achieve the shock absorption and energy absorption during the gear rack meshing process. In order to meet the NVH performance of different load models, different O-ring compression amounts need to be matched to ensure that there is no significant difference in the NVH performance of the front and rear steering gears.
[0003] In the early development process, the demand for evaluating the shear fatigue performance of O-rings under different compression amounts is increasing. At present, the common shear fatigue performance of O-rings under different compression amounts can only be verified through steering gear system-level durability tests, which not only wastes steering gear assembly samples, but also is costly and requires a long verification cycle.
[0004] Therefore, it is necessary to design a shear strength testing equipment for O-rings of small assembly of a pressing block to realize fatigue performance verification at the O-ring component level and reduce verification cost and cycle. Summary of the invention
[0005] The utility model aims to overcome the deficiencies of the prior art and provides a shear strength testing device for a small-block assembly O-ring, so as to realize the fatigue performance verification of the O-ring component level and reduce the verification cost and cycle.
[0006] In order to achieve the above-mentioned purpose, the utility model is a shear strength testing device for O-rings of a small pressure block assembly, comprising a base plate, a bracket, a support seat, a pressure plate, a guide block, a force sensor, a pressure cover, an adjusting bolt, and a fixing bolt. The lower end of the bracket is fixed to the base plate, a support seat is installed in the center of the bracket, two ends of the pressure cover are connected to the bracket, and the middle part of the pressure cover is mounted on the front side of the support seat, an adjusting bolt is installed in the middle part of the pressure cover, and the end of the adjusting bolt passes through the pressure cover and abuts against the force sensor. The force sensor is arranged in a mounting groove on the front side of the guide block, and the back side of the guide block abuts against the pressure plate. The pressure plate covers the front side of the support seat, and an O-ring mounting groove is provided on the contact surface between the support seat and the pressure plate. The upper end of the pressure plate is connected to the movable end of the loading device.
[0007] The bottom plate is covered with a temperature control box, and the upper end of the pressing plate passes through the upper surface of the temperature control box.
[0008] The loading device comprises a cylinder, a piston rod of which is connected to the upper end of the pressing plate.
[0009] A through hole is arranged in the center of the bracket, the support seat passes through the through hole, and the flange of the support seat is connected to the back side of the bracket.
[0010] An O-ring is placed in the O-ring installation groove, and the front surface of the O-ring contacts the back surface of the pressing plate.
[0011] The depth of the O-ring installation groove matches the wire diameter of the O-ring.
[0012] The gland is in a door-shaped structure.
[0013] A fixing bolt is installed on the front side of the middle part of the gland, and the adjusting bolt is connected with the fixing bolt by thread.
[0014] Compared with the prior art, the utility model designs a shear strength test device for O-rings of small briquetting assemblies, realizes the fatigue performance verification of O-ring components, does not need to destroy the steering assembly sample, reduces the verification cost, and shortens the verification cycle. The test equipment can be repeatedly adjusted and reused, the O-ring is easy to disassemble and assemble, and the equipment has high adaptability. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 It is an axonometric drawing of the present utility model.
[0016] Figure 2 This is a cross-sectional view of the utility model after being installed in a temperature control box.
[0017] Figure 3 It is an axonometric drawing of the support seat of the utility model.
[0018] Figure 4 It is an axonometric drawing of the pressing block of the utility model.
[0019] Figure 5 It is an axonometric drawing of the guide block of the utility model.
[0020] Figure 6 It is an axonometric view of the gland of the utility model.
[0021] Figure 7 It is an axonometric drawing of the bracket of the utility model. DETAILED DESCRIPTION
[0022] The utility model is now further described with reference to the accompanying drawings.
[0023] See also Figure 1 to Figure 7The utility model is a shear strength testing device for an O-ring of a small pressure block assembly, comprising a base plate, a bracket, a support seat, a pressure plate, a guide block, a force sensor, a pressure cover, an adjusting bolt, and a fixing bolt. The lower end of the bracket 2 is fixed to the base plate 1, a support seat 3 is installed in the center of the bracket 2, both ends of the pressure cover 7 are connected to the bracket 2, and the middle part of the pressure cover 7 is mounted on the front side of the support seat 3, an adjusting bolt 8 is installed in the middle part of the pressure cover 7, and the end of the adjusting bolt 8 passes through the pressure cover 7 and abuts against the force sensor 6. The force sensor 6 is arranged in the mounting groove on the front side of the guide block 5, the back side of the guide block 5 abuts against the pressure plate 4, the pressure plate 4 covers the front side of the support seat 3, an O-ring mounting groove 31 is provided on the contact surface between the support seat 3 and the pressure plate 4, and the upper end of the pressure plate 4 is connected to the movable end of the loading device.
[0024] The bottom plate 1 is covered with a temperature control box 11, and the upper end of the pressing plate 4 passes through the upper surface of the temperature control box 11. The required experimental temperature is adjusted by the temperature control box 11, so that fatigue verification under high and low temperature conditions can be achieved.
[0025] The loading device comprises a cylinder, a piston rod of which is connected to the upper end of the pressing plate 4 .
[0026] See also Figure 3 , Figure 7 A through hole 21 is provided in the center of the bracket 2 , the support seat 3 passes through the through hole 21 , and the flange 32 of the support seat 3 is connected to the back side of the bracket 2 .
[0027] An O-ring 10 is placed in the O-ring installation groove 31, and the front surface of the O-ring 10 contacts the back surface of the pressure plate 4. The depth of the O-ring installation groove 31 matches the wire diameter of the O-ring 10. When a different O-ring wire diameter needs to be matched, it is only necessary to replace the support seat 3 with the O-ring installation groove 31 of the corresponding depth.
[0028] See also Figure 6 , the gland 7 is in a door-shaped structure.
[0029] In order to facilitate the connection between the gland 7 and the adjusting bolt 8, a fixing bolt 9 is installed on the front side of the middle of the gland 7, and the adjusting bolt 8 and the fixing bolt 9 are connected by threads.
[0030] When the utility model is working, according to the wire diameter of the O-ring and the compression amount of the O-ring required by the test, the depth of the O-ring installation groove 31 is confirmed, and the corresponding support seat 3 is installed on the bracket 2, and the O-ring 10 is installed in the O-ring installation groove 31 of the support seat 3, and the adjustment bolt 9 is adjusted so that the value on the force sensor 6 meets the axial preload required by the test. The upper end of the pressure plate 4 is connected to the piston rod of the cylinder, and the cylinder drives the pressure plate 4 to reciprocate up and down, thereby completing the shear strength test of the O-ring 10.
[0031] The utility model designs a shear strength test device for O-rings of small block assemblies, which realizes the fatigue performance verification of O-ring components, without destroying the steering gear assembly sample, reducing the verification cost and shortening the verification cycle. The test equipment can be repeatedly adjusted and reused, the O-ring is easy to disassemble and assemble, and the equipment has high adaptability.
Claims
1. A shear strength test device for O-rings of a small pressure block assembly, comprising a base plate, a bracket, a support seat, a pressure plate, a guide block, a force sensor, a pressure cover, an adjustment bolt, and a fixing bolt, characterized in that: The lower end of the bracket (2) is fixed to the bottom plate (1), a support seat (3) is installed in the center of the bracket (2), both ends of the pressure cover (7) are connected to the bracket (2), and the middle part of the pressure cover (7) is mounted on the front side of the support seat (3), and an adjustment bolt (8) is installed in the middle part of the pressure cover (7). After the end of the adjustment bolt (8) passes through the pressure cover (7), it abuts against the force sensor (6), and the force sensor (6) is arranged in the installation groove on the front side of the guide block (5). The back side of the guide block (5) abuts against the pressure plate (4), and the pressure plate (4) covers the front side of the support seat (3). An O-ring installation groove (31) is provided on the contact surface between the support seat (3) and the pressure plate (4), and the upper end of the pressure plate (4) is connected to the movable end of the loading device.
2. The shear strength testing device for a small-block assembly O-ring according to claim 1, characterized in that: The base plate (1) is covered with a temperature control box (11), and the upper end of the pressing plate (4) passes through the upper surface of the temperature control box (11).
3. The shear strength testing device for a compact small assembly O-ring according to claim 1, characterized in that: The loading device comprises a cylinder, a piston rod of the cylinder being connected to the upper end of the pressing plate (4).
4. The shear strength testing device for a compact assembly O-ring according to claim 1, characterized in that: A through hole (21) is provided in the center of the bracket (2), the support seat (3) passes through the through hole (21), and the flange (32) of the support seat (3) is connected to the back side of the bracket (2).
5. The shear strength testing device for a compact small assembly O-ring according to claim 1, characterized in that: An O-ring (10) is placed in the O-ring installation groove (31), and the front surface of the O-ring (10) is in contact with the back surface of the pressing plate (4).
6. The shear strength testing device for a compact assembly O-ring according to claim 5, characterized in that: The depth of the O-ring installation groove (31) matches the wire diameter of the O-ring (10).
7. The shear strength testing device for O-rings of a compact assembly according to claim 1, characterized in that: The gland (7) is in the shape of a door.
8. The shear strength testing device for O-rings of a compact assembly according to claim 1, characterized in that: A fixing bolt (9) is installed on the front side of the middle part of the gland (7), and the adjusting bolt (8) is threadedly connected to the fixing bolt (9).