A device for impact testing of a control arm of a vehicle

Abstract

The application discloses a kind of automobile control arm impact test device of automobile parts detection technical field, including base, impact hammer and the limiting rod of fixed connection in the left and right sides of base top, the left and right sides of impact hammer are all provided with support group;When the impact hammer is rebounded when being impacted, the support piece will be raised with the impact hammer relative to the cross bar and wedge block, and the wedge block will keep in contact with the support piece and move towards the direction close to the impact hammer at this time, until the impact hammer and the support piece descend, the wedge block will directly limit the descending direction of the support piece and the impact hammer at any height, so that the impact hammer cannot descend to ensure that the impact hammer will not rebound, and when resetting the support piece and the impact hammer to facilitate the impact test, the lock of the impact hammer can be released at the same time, and then the replacement and placement of the impact hammer are facilitated.

Description

Technical Field

[0001] This invention relates to the field of automotive parts testing technology, specifically to an impact testing device for automotive control arms. Background Technology

[0002] As a guiding and force-transmitting element of the vehicle suspension system, the vehicle control arm transmits various forces acting on the wheels to the vehicle body, ensuring that the wheels move along a certain trajectory. Therefore, in order to ensure the safety performance of the vehicle, the control arm must be subjected to impact performance tests to verify its reliability under impact. During the impact test, the instantaneous impact of the impact hammer falling is changed by raising the impact hammer to different heights or by replacing it with an impact hammer of different sizes, thereby meeting the experimental requirements.

[0003] An existing automotive control arm impact testing device with application number 202211524669.1 uses a combination of a first driven gear, a first rack, a fixed sleeve, a locking pin, a second rack, a second driven gear, and a locking plate to achieve the rebound of the impact hammer. However, in actual use, the rebound height of the impact hammer must be within a relatively large range to achieve this, rather than directly restricting the impact hammer when it has a rebound tendency. Therefore, if the locking plate cannot reach the fixed sleeve when the impact hammer rises, the second rack rod cannot extend from the cavity, thus failing to restrict the rebound of the impact hammer and making it inconvenient to replace the hammer head. Summary of the Invention

[0004] The purpose of this invention is to provide an impact testing device for automotive control arms to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: an impact testing device for an automobile control arm, comprising a base, an impact hammer, and limiting rods fixedly connected to the left and right sides of the top of the base, wherein support groups are provided on both the left and right sides of the impact hammer.

[0006] The support assembly includes a crossbar and a positioning rod. The positioning rod is fixedly connected to the side wall of the impact hammer. The crossbar is slidably connected to a limiting rod. A support member is slidably connected to the crossbar. The support member is wedge-shaped and has a placement groove. The positioning rod is located inside the placement groove. A cover plate is provided above the placement groove. A drive assembly is provided on one side of the cover plate. The drive assembly is used to drive the cover plate to restrict the positioning rod after it is placed inside the placement groove. A wedge block is provided on the right side of the support member. The wedge block is fixedly connected to the drive rod. The side wall of the wedge block fits against the side wall of the support member. The drive rod is slidably connected to the inner side wall of the crossbar in the horizontal direction. A first spring is fixedly connected between the drive rod and the inner wall of the crossbar. A locking assembly is provided on one side of the drive rod. The locking assembly is used to unidirectionally restrict the sliding direction of the drive rod.

[0007] As a further embodiment of the present invention, a reset assembly is provided on one side of the drive rod;

[0008] The reset assembly includes a pull plate located below the drive rod. A contact piece is located on the right side of the pull plate. As the pull plate moves to the right, it contacts the contact piece and then drives the contact piece to move. The contact piece is fixedly connected to the bottom end of the drive rod. A first cylinder is fixedly connected to the pull plate. The first cylinder is fixedly connected to the inner wall of the crossbar. The pull plate is U-shaped and its two ends are located on the front and rear sides of the crossbar.

[0009] As a further embodiment of the present invention, the locking assembly includes a lifting rod disposed above the pull plate, a sixth spring fixedly connected between the lifting rod and the inner wall of the crossbar, a horizontal groove provided on the lifting rod, the horizontal groove being inclined and then extending horizontally to the right, a first rack fixedly connected to the lifting rod, a first one-way gear meshing below the first rack, and the first one-way gear being rotatably connected to the top of the drive rod.

[0010] As a further aspect of the present invention, each of the crossbars is provided with a one-way limiting group, which is used to limit the sliding direction of the crossbar on the limiting bar.

[0011] As a further embodiment of the present invention, the drive group includes a centering adjustment group and a limiting group. The centering adjustment group is used to center the positioning rod after it is placed inside the placement slot, and the limiting group is used to limit the positioning rod after it is placed inside the placement slot.

[0012] As a further embodiment of the present invention, the centering adjustment group includes a second rack rod, a gear disk, and a third rack rod. The gear disk is rotatably connected to the crossbar, and the third rack rod is slidably connected to the crossbar in the horizontal direction and meshes with the gear disk. The second rack rod is fixedly connected to the right side wall of the pull plate, and a push rod is provided on the left end of the third rack rod. After the push rod moves to the left to its limit, its end will enter the placement groove.

[0013] As a further embodiment of the present invention, the centering adjustment group further includes an adaptation group, the adaptation group including a second spring, the push rod being slidably connected to the third rack rod, and the second spring being fixedly connected between the third rack rod and the push rod;

[0014] After the push rod pushes the positioning rod to center, the limiting group will restrict the positioning rod.

[0015] As a further embodiment of the present invention, the limiting assembly includes a vertical rod, a third spring, a positioning pin, and a positioning groove. The vertical rod is located on the left side of the pull plate and is slidably connected to the support member in the horizontal direction. The third spring is fixedly connected between the vertical rod and the inner wall of the support member. As the pull plate moves from the rightmost side to the leftmost side, it pushes the vertical rod to slide along the support member. The vertical rod is slidably connected to the cover plate. A fourth spring is fixedly connected between the cover plate and the vertical rod. The positioning pin is slidably connected to the inner wall of the cover plate. The end of the positioning pin is wedge-shaped. The positioning groove is formed on the positioning rod and matches the positioning pin.

[0016] As a further embodiment of the present invention, a fifth spring is fixedly connected between the positioning pin and the inner wall of the cover plate.

[0017] As a further embodiment of the present invention, the one-way limiting group includes a fourth rack, a second one-way gear, and a connecting rod. The fourth rack is fixedly connected to the side wall of the limiting rod. The second one-way gear is rotatably connected to the connecting rod and meshes with the fourth rack. The connecting rod is slidably connected to the crossbar. A second cylinder is fixedly connected between the connecting rod and the side wall of the crossbar.

[0018] Compared with the prior art, the beneficial effects of the present invention are:

[0019] In this invention, when the impact hammer rebounds after being impacted, the support member rises relative to the crossbar and wedge block along with the impact hammer. At this time, the wedge block remains in contact with the support member and moves towards the impact hammer. When the impact hammer and the support member descend, the wedge block directly restricts the descent direction of the support member and the impact hammer at any height, preventing the impact hammer from descending and ensuring that the impact hammer does not rebound. Furthermore, when the support member and the impact hammer are reset to facilitate the descent impact test, the locking of the impact hammer can be released simultaneously, thereby facilitating the replacement and placement of the impact hammer.

[0020] Furthermore, when the impact hammer rebounds after being struck, it can directly move the support upwards, allowing the stress on the impact hammer to be released, rather than directly locking the hammer head. This prevents the stress on the impact hammer from being unable to be released and instead being applied to the crossbar and cover plate. Then, by limiting the downward trend of the support, the rebound of the support is completed, which can greatly reduce the load on the overall device.

[0021] The system can automatically adjust the centering of the impact hammer after changing to different sizes to prevent it from shifting, and it can also automatically lock after centering adjustment. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0023] Figure 2 This is a schematic diagram showing the positional relationship between the crossbar, support member, limiting rod, and impact hammer of the present invention.

[0024] Figure 3 This is a schematic diagram showing the positional relationship between the crossbar, the drive rod, the wedge block, and the support member of the present invention;

[0025] Figure 4 This is a schematic diagram showing the positional relationship between the support member, the drive rod, and the vertical rod of the present invention;

[0026] Figure 5 This is a schematic diagram showing the positional relationship between the impact hammer, the support member, and the cover plate of the present invention;

[0027] Figure 6 for Figure 5 A magnified view of a section at point A in the middle;

[0028] Figure 7 This is a schematic diagram showing the positional relationship between the horizontal bar, vertical bar, and lifting bar of the present invention;

[0029] Figure 8 This is a schematic diagram showing the connection between the lifting rod and the sixth spring of the present invention.

[0030] The labels in the attached diagram are as follows:

[0031] 1. Base; 2. Impact hammer; 3. Limiting rod; 4. Horizontal bar; 5. Support component; 6. Placement slot; 7. Positioning rod; 8. Wedge block; 9. Drive rod; 10. Pull plate; 11. Contact piece; 12. First cylinder; 13. Lifting rod; 14. Horizontal groove; 15. First rack rod; 16. First one-way gear; 17. Cover plate; 18. Second rack rod; 19. Gear disk; 20. Third rack rod; 21. Push rod; 22. Second spring; 23. Vertical rod; 24. Third spring; 25. Fourth spring; 26. Positioning pin; 27. Positioning groove; 28. Fifth spring; 29. ​​Sixth spring; 30. Fourth rack rod; 31. Second one-way gear; 32. Connecting rod; 33. Second cylinder; 34. First spring. Detailed Implementation

[0032] Please see Figures 1-8 The present invention provides a technical solution: an impact testing device for an automobile control arm, including a base 1, an impact hammer 2, and limiting rods 3 fixedly connected to the left and right sides of the top of the base 1. Support groups are provided on both the left and right sides of the impact hammer 2.

[0033] The support assembly includes a crossbar 4 and a positioning rod 7. The positioning rod 7 is fixedly connected to the side wall of the impact hammer 2. The crossbar 4 is slidably connected to the limiting rod 3. A support member 5 is slidably connected to the crossbar 4. The support member 5 is wedge-shaped and has a placement groove 6. The positioning rod 7 is located inside the placement groove 6. A cover plate 17 is provided above the placement groove 6. A drive assembly is provided on one side of the cover plate 17. The drive assembly is used to drive the cover plate 17 to restrict the positioning rod 7 after it is placed inside the placement groove 6. A wedge block 8 is provided on the right side of the support member 5. A drive rod 9 is fixedly connected to the wedge block 8. The side wall of the wedge block 8 fits against the side wall of the support member 5. The drive rod 9 is slidably connected to the inner side wall of the crossbar 4 in the horizontal direction. A first spring 34 is fixedly connected between the drive rod 9 and the inner wall of the crossbar 4. A locking assembly is provided on one side of the drive rod 9. The locking assembly is used to unidirectionally restrict the sliding direction of the drive rod 9.

[0034] A reset assembly is provided on one side of the drive rod 9;

[0035] The reset assembly includes a pull plate 10 located below the drive rod 9. A contact piece 11 is located on the right side of the pull plate 10. As the pull plate 10 moves to the right, it contacts the contact piece 11 and then drives the contact piece 11 to move. The contact piece 11 is fixedly connected to the bottom end of the drive rod 9. A first cylinder 12 is fixedly connected to the pull plate 10. The first cylinder 12 is fixedly connected to the inner wall of the crossbar 4. The pull plate 10 is U-shaped and its two ends are located on the front and rear sides of the crossbar 4.

[0036] The locking assembly includes a lifting rod 13 disposed above the pull plate 10. A sixth spring 29 is fixedly connected between the lifting rod 13 and the inner wall of the crossbar 4. A horizontal groove 14 is provided on the lifting rod 13. The horizontal groove 14 is inclined and then extends horizontally to the right. A first rack rod 15 is fixedly connected to the lifting rod 13. A first one-way gear 16 is engaged below the first rack rod 15. The first one-way gear 16 is rotatably connected to the top of the drive rod 9.

[0037] Each crossbar 4 is equipped with a one-way limit group, which is used to limit the sliding direction of the crossbar 4 on the limit bar 3.

[0038] like Figures 1-7 As shown:

[0039] A clamping assembly is provided on the base 1. The clamping assembly is used to clamp the control arm placed on the base 1 so that the control arm will not deviate when the impact hammer 2 impacts. The clamping assembly is common knowledge in the existing field, so it is not specifically shown in the figure. Then, the crossbars 4 are lifted up to the specified height along the two limit bars 3 by manual or mechanical lifting. Then, the impact hammer 2 is placed into the placement slot 6 through the two positioning bars 7.

[0040] The placement of impact hammer 2 is as follows:

[0041] When the impact hammer 2 is not placed inside the placement slot 6, the first cylinder 12 is in an unextended state (all figures show the extended state). When the first cylinder 12 is not extended, it pulls the pull plate 10 to the far right, and at this time, the end of the pull plate 10 will slide to the far right along the transverse groove 14. Because the transverse groove 14 is inclined and then extends horizontally to the right, when the pull plate 10 is at the far right, it will push the lifting rod 13 to slide up the transverse rod 4 to its limit, so that the first rack rod 15 does not engage with the first one-way gear 16. Contact (the sixth spring 29 is used to assist in the lifting of the lifting rod 13). During the process of the pull plate 10 being shortened by the first cylinder 12 and pulled to the right, the pull plate 10 will move towards the contact piece 11 and after the two make contact, it will pull the contact piece 11 to the right. At this time, the contact piece 11 will be forcibly pulled to the right and drive the drive rod 9 to slide along the inner wall of the crossbar 4. When the drive rod 9 moves to the right, it will drive the wedge block 8 to move to the right together. At this time, the first spring 34 will be gradually compressed, and the wedge block 8 will then contact the support. Part 5 is disengaged, and then the drive assembly moves the cover plate 17 to the right to release the restriction on the upper part of the placement slot 6, allowing the placement slot 6 to be exposed to the outside. Then, the positioning rod 7 on the impact hammer 2 can be placed inside the placement slot 6. Then, the first cylinder 12 is extended to the left to its limit. During the extension of the first cylinder 12, the drive rod 9 will be pushed by the elastic relaxation of the first spring 34 to move the drive rod 9 and the wedge block 8 towards the support member 5. When the drive rod 9 moves to the left to its limit, the contact piece 11 will disengage from the pull plate 10, but the pull plate 10 will continue to move to the left, thus creating a certain distance between the pull plate 10 and the contact piece 11. After the first cylinder 12 is fully extended, the wedge block 8 will once again fit against the inclined side wall of the support member 5, and at this time, the end of the pull plate 10 will be at the leftmost side of the transverse groove 14. At this time, the drive assembly will drive the cover plate 17 to move to the left to restrict the positioning rod 7 and the impact hammer 2. At this time, the placement of the impact hammer 2 is completed, and the impact test can begin.

[0042] During the impact test, the height of the impact hammer 2 relative to the control arm should be adjusted, and then the crossbar 4 should be lowered from the specified height. At this time, the impact hammer 2 and the crossbar 4 will fall together. The crossbar 4 will slide down along the limit bar 3. When the impact hammer 2 contacts the control arm, the impact on the control arm is completed. The impact hammer 2 will have a tendency to rebound after the impact is completed.

[0043] When the impact hammer 2 rebounds, its rebound trajectory is a wave-like motion of rising first and then falling. When the impact hammer 2 contacts the control arm, the crossbar 4, under the restriction of the one-way limiting group, locks its upward sliding direction, preventing it from sliding upwards and only retaining a downward tendency. This ensures that the impact hammer 2's rebound does not cause the crossbar 4 to rise. The support member 5 is slidably connected to the crossbar 4, and at this time, the cover plate 17 restricts the positioning rod 7 inside the positioning groove 27. Therefore, when the impact hammer 2 rebounds, it tends to cause the support member 5 to rise. If the impact hammer 2 causes the support member 5 to rise... As the support member 5 slides upward, the support member 5 will slide upward along the crossbar 4. When the support member 5 rises, the inclined side wall of the support member 5 will rise relative to the wedge block 8. When the support member 5 rises, the wedge block 8 and the drive rod 9 will be pushed by the first spring 34 to move the wedge block 8 from right to left to maintain continuous contact with the side wall of the support member 5. During this process, the first one-way gear 16 will mesh with the first rack rod 15 and move to the left while rotating (the first one-way gear 16 can only rotate in this direction). At this time, the contact piece 11 will also move closer to the pull plate 10.

[0044] When the impact hammer 2 rises, it will fall. However, when the impact hammer 2 falls, the side wall of the support member 5 is blocked by two wedge blocks 8. At this time, the wedge blocks 8 will not move to the right, and the drive rod 9 and the wedge blocks 8 can only move in the direction of the impact hammer 2 and cannot move away from the impact hammer 2. This will cause the two support members 5 to be blocked by the wedge blocks 8 and unable to fall along the crossbar 4. This will prevent the impact hammer 2 from falling, and it will not be able to fall regardless of the change in the rising height of the support members 5 and the impact hammer 2, thus ensuring that the support members 5 and the impact hammer 2 cannot rebound.

[0045] After the impact hammer 2 and the crossbar 4 have completed their impact, the crossbar 4 can be reset and then the next impact test can be carried out. The impact magnitude of the next impact test can be adjusted by adjusting the height of the crossbar 4. However, after multiple uses, the surface of the impact hammer 2 will be damaged, which may affect the contact during subsequent impacts. Therefore, the impact hammer 2 can be replaced.

[0046] The process of resetting the crossbar 4 and replacing the impact hammer 2 is as follows:

[0047] The crossbar 4 is pushed upward to the specified height by manual or mechanical lifting. Then, the impact hammer 2 is placed to reset the support 5. After the first cylinder 12 is shortened, the drive rod 9, wedge block 8, contact plate 11 and pull plate 10 will move to the right. At this time, the support 5, which was originally rising relative to the crossbar 4, will automatically reset under the action of gravity when it is separated from the wedge block 8. Then the drive group will also drive the cover plate 17 to move to the right to release the restriction on the placement slot 6 and expose the placement slot 6. Then, a new impact hammer 2 can be replaced. Even if the impact hammer 2 is not replaced, the impact hammer 2 will automatically complete the reset work until the next use. Therefore, after the first cylinder 12 is extended again, the cover plate 17 will restrict the placement slot 6 again, thereby locking the impact hammer 2.

[0048] In this invention, when the impact hammer 2 rebounds after being impacted, the support member 5 will rise relative to the crossbar 4 and the wedge block 8 along with the impact hammer 2. At this time, the wedge block 8 will maintain contact with the support member 5 and move towards the impact hammer 2. When the impact hammer 2 and the support member 5 descend, the wedge block 8 will directly restrict the descent direction of the support member 5 and the impact hammer 2 at any height, so that the impact hammer 2 cannot descend and thus ensures that the impact hammer 2 will not rebound. Furthermore, when the support member 5 and the impact hammer 2 are reset to facilitate the descent impact test, the locking of the impact hammer 2 can be released at the same time, thereby facilitating the replacement and placement of the impact hammer 2.

[0049] Furthermore, when the impact hammer 2 rebounds after being hit, it can directly move the support member 5 upward, allowing the stress on the impact hammer 2 to be released, rather than directly locking the hammer head. This avoids the stress on the impact hammer 2 being unable to be released and thus being applied to the crossbar 4 and the cover plate 17. Then, by limiting the downward trend of the support member 5, the rebound of the support member 5 is completed, which can greatly reduce the load borne by the overall device.

[0050] The drive assembly includes a centering adjustment assembly and a limiting assembly. The centering adjustment assembly is used to center the positioning rod 7 after it is placed inside the placement slot 6. The limiting assembly is used to restrict the positioning rod 7 after it is placed inside the placement slot 6.

[0051] The centering adjustment assembly includes a second rack 18, a gear disk 19, and a third rack 20. The gear disk 19 is rotatably connected to the crossbar 4, and the third rack 20 is slidably connected to the crossbar 4 in the horizontal direction and meshes with the gear disk 19. The second rack 18 is fixedly connected to the right side wall of the pull plate 10, and a push rod 21 is provided on the left end of the third rack 20. After the push rod 21 moves to the left to its limit, its end will enter the placement groove 6.

[0052] The centering adjustment group also includes an adaptation group, which includes a second spring 22, a push rod 21 and a third rack rod 20 that are slidably connected, and the second spring 22 is fixedly connected between the third rack rod 20 and the push rod 21.

[0053] After the push rod 21 pushes the positioning rod 7 to center, the limiting group will restrict the positioning rod 7.

[0054] The limiting assembly includes a vertical rod 23, a third spring 24, a positioning pin 26, and a positioning groove 27. The vertical rod 23 is located on the left side of the pull plate 10 and is slidably connected to the support member 5 in the horizontal direction. The third spring 24 is fixedly connected between the vertical rod 23 and the inner wall of the support member 5. When the pull plate 10 moves from the rightmost side to the leftmost side, it will push the vertical rod 23 to slide along the support member 5. The vertical rod 23 is slidably connected to the cover plate 17. A fourth spring 25 is fixedly connected between the cover plate 17 and the vertical rod 23. The positioning pin 26 is slidably connected to the inner wall of the cover plate 17. The end of the positioning pin 26 is wedge-shaped. The positioning groove 27 is opened on the positioning rod 7 and matches the positioning pin 26.

[0055] A fifth spring 28 is fixedly connected between the positioning pin 26 and the inner wall of the cover plate 17.

[0056] like Figure 2 , Figure 3 , Figures 5-7 As shown:

[0057] When the limiting group is in the working position, the first cylinder 12 is in the extended limit state, and at this time the pull plate 10 pushes the vertical rod 23 to slide to the left along the support member 5 and compresses the third spring 24. At this time, the fourth spring 25 is also in a compressed state. At this time, the positioning pin 26 is in the positioning groove 27, and the cover plate 17 is also above the placement groove 6. When the impact test is carried out, the vertical movement of the impact hammer 2 is restricted by the placement groove 6 and the cover plate 17, while the horizontal movement is restricted by the positioning groove 27 and the positioning pin 26, so it cannot move, thereby ensuring the fixed position of the impact hammer 2. Therefore, the impact hammer 2 can only drive the support member 5 to slide up along the horizontal bar 4. At this time, the vertical rod 23 will rise while maintaining contact with the side wall of the pull plate 10.

[0058] When it is necessary to reset the support 5 and impact hammer 2 for the next operation, first slide the crossbar 4 along the limit bar 3 until the impact hammer 2 disengages from the control arm. Then, the first cylinder 12 will shorten. When the first cylinder 12 shortens to the point where the pull plate 10 contacts the contact piece 11 and moves the contact piece 11 to the position after the support 5 and impact hammer 2 have been reset, pause the extension of the first cylinder 12. At this time, the pull plate 10 will disengage from the vertical rod 23 and move to the right side of the vertical rod 23. At this time, the third spring 24 and... The fourth spring 25 will not be compressed. At this time, the cover plate 17 will be pulled to the rightmost position (i.e., the position in contact with the side wall of the support 5). At this time, the placement groove 6 will be exposed, and when the cover plate 17 moves to the right, it will drive the positioning pin 26 to move. At this time, the inclined side wall of the end of the positioning pin 26 will slide out from the inside of the positioning groove 27. During this process, the fifth spring 28 will be compressed. After the positioning pin 26 moves to the right side of the positioning rod 7, the fifth spring 28 will be completely released. Then the impact hammer 2 can be replaced.

[0059] If a larger impact hammer 2 needs to be replaced (the size of the impact hammer 2 body will change, but the size of the positioning rod 7 and the positioning groove 27 cannot be changed), then the two positioning rods 7 can be placed directly into the two positioning grooves 27. Then the first cylinder 12 can continue to shorten. During the shortening process, the pull plate 10 will drive the second rack rod 18 to move to a position that can mesh with the gear plate 19 and will continue to move to the right. At this time, the gear plate 19 will mesh with the second rack rod 18 and drive the third rack rod 20 to slide to the left along the crossbar 4 through the gear plate 19. When the third rack rod 20 moves to the left, it will drive the push rod 21 to move towards the inside of the placement groove 6. When the push rod 21 contacts the end of the positioning rod 7, the push rod 21 will push the two ends of the two positioning rods 7 from the left and right sides to center them. If the two positioning rods 7 are already centered, the second spring 22 will be compressed when the push rod 21 moves in the future. The setting of the second spring 22 can enable the push rod 21 to meet the centering adjustment for impact hammers 2 of different sizes.

[0060] Then, the first cylinder 12 will shorten to its limit, at which point the centering adjustment of the positioning rod 7 has been completed. Next, the first cylinder 12 needs to be extended. When it extends, the second rack rod 18 and the third rack rod 20 will drive the push rod 21 to reset. After the second rack rod 18 moves to the left side of the gear plate 19, the pull plate 10 continues to move to the left and then contacts the vertical rod 23, pushing it to slide to the left along the support member 5. At this time, the third spring 24 will be compressed, and the vertical rod 23 will also drive the cover plate 17 to move to the left. The positioning pin 26 will then move from one side of the positioning rod 7 towards the positioning groove 27. When the bottom end of the positioning pin 26 contacts the positioning rod... When the inclined end of the 7 contacts, it will first push the positioning pin 26 to slide up along the cover plate 17 and gradually compress the fifth spring 28 so that the positioning pin 26 can move along the positioning rod 7. After the positioning pin 26 enters the positioning groove 27, the elasticity of the fifth spring 28 will be released to a certain extent. However, at this time, the side wall of the positioning pin 26 will be blocked by the side wall of the positioning groove 27 and will not be able to move to the left. At this time, the positioning pin 26 will be fixed at this position. When the vertical rod 23 continues to move to the left, it will compress the fourth spring 25 and will not be able to drive the cover plate 17 to move. This satisfies the positioning requirement when the length of the positioning rod 7 relative to the cover plate 17 changes when the size of the impact hammer 2 changes.

[0061] At this point, the replacement and limitation of impact hammers 2 of different sizes are completed. Once the crossbar 4 rises to the specified distance, another impact test can be conducted.

[0062] Several ball bearings are rotatably connected to the bottom wall of the placement groove 6.

[0063] As shown in the figure:

[0064] The use of ball bearings is common knowledge in the prior art. Their purpose is only to reduce friction when the push rod 21 pushes the positioning rod 7 to slide inside the placement groove 6, so they are not specifically shown in the figure.

[0065] The one-way limiting assembly includes a fourth rack 30, a second one-way gear 31, and a connecting rod 32. The fourth rack 30 is fixedly connected to the side wall of the limiting rod 3. The second one-way gear 31 is rotatably connected to the connecting rod 32 and meshes with the fourth rack 30. The connecting rod 32 is slidably connected to the crossbar 4. A second cylinder 33 is fixedly connected between the connecting rod 32 and the side wall of the crossbar 4.

[0066] like Figure 1 , Figure 2 as well as Figure 7 As shown:

[0067] When the crossbar 4 slides down along the limit bar 3, the second one-way gear 31 will mesh with the fourth rack 30 and rotate around the rotating shaft, thereby allowing the crossbar 4 to descend. However, the second one-way gear 31 cannot maintain rotation while meshing with the fourth rack 30 when the crossbar 4 rises, so the crossbar 4 cannot rise when the impact hammer 2 is impacted. When it is necessary to reset the impact hammer 2 and the support 5, the crossbar 4 needs to drive the impact hammer 2 to rise above the control arm. Therefore, at this time, the second cylinder 33 extends and drives the connecting rod 32 to slide along the crossbar 4, thereby disengaging the second one-way gear 31 from the fourth rack 30, and then the crossbar 4 can rise. The second cylinder 33 is then reset before the crossbar 4 descends.

Claims

1. An impact testing device for an automotive control arm, comprising a base (1), an impact hammer (2), and limiting rods (3) fixedly connected to the left and right sides of the top of the base (1), characterized in that: Support assemblies are provided on both the left and right sides of the impact hammer (2); the support assemblies include a crossbar (4) and a positioning rod (7). The positioning rod (7) is fixedly connected to the side wall of the impact hammer (2). The crossbar (4) is slidably connected to the limiting rod (3). A support member (5) is slidably connected to the crossbar (4). The support member (5) is wedge-shaped. A placement groove (6) is provided on the support member (5). The positioning rod (7) is located inside the placement groove (6). A cover plate (17) is provided above the placement groove (6). A drive assembly is provided on one side of the cover plate (17). The drive assembly is used for positioning... After the rod (7) is placed inside the placement slot (6), the drive cover (17) restricts the positioning rod (7). A wedge block (8) is provided on the right side of the support member (5). The wedge block (8) is fixedly connected to the drive rod (9). The side wall of the wedge block (8) is in contact with the side wall of the support member (5). The drive rod (9) is slidably connected to the inner side wall of the crossbar (4) in the horizontal direction. A first spring (34) is fixedly connected between the drive rod (9) and the inner wall of the crossbar (4). A locking group is provided on one side of the drive rod (9). The locking group is used to unidirectionally restrict the sliding direction of the drive rod (9). A reset assembly is provided on one side of the drive rod (9); the reset assembly includes a pull plate (10) provided below the drive rod (9), and a contact piece (11) is provided on the right side of the pull plate (10). When the pull plate (10) moves to the right, it will contact the contact piece (11) and then drive the contact piece (11) to move. The contact piece (11) is fixedly connected to the bottom end of the drive rod (9). A first cylinder (12) is fixedly connected to the pull plate (10). The first cylinder (12) is fixedly connected to the inner wall of the crossbar (4). The pull plate (10) is U-shaped and its two ends are located on the front and rear sides of the crossbar (4). The drive group includes a centering adjustment group and a limiting group. The centering adjustment group is used to center the positioning rod (7) after it is placed inside the placement slot (6). The limiting group is used to restrict the positioning rod (7) after it is placed inside the placement slot (6). The centering adjustment group includes a second rack (18), a gear disk (19), and a third rack (20). The gear disk (19) is rotatably connected to the crossbar (4). The third rack (20) is slidably connected to the crossbar (4) in the horizontal direction and meshes with the gear disk (19). The second rack (18) is fixedly connected to the right side wall of the pull plate (10). A push rod (21) is provided on the left end of the third rack (20). After the push rod (21) moves to the left to its limit, its end will enter the placement groove (6). The centering adjustment group also includes an adaptation group, which includes a second spring (22). The push rod (21) is slidably connected to the third rack rod (20). The second spring (22) is fixedly connected between the third rack rod (20) and the push rod (21). After the push rod (21) pushes the positioning rod (7) to center, the limiting group will limit the positioning rod (7). The limiting assembly includes a vertical rod (23), a third spring (24), a positioning pin (26), and a positioning groove (27). The vertical rod (23) is located on the left side of the pull plate (10) and is slidably connected to the support member (5) in the horizontal direction. The third spring (24) is fixedly connected between the vertical rod (23) and the inner wall of the support member (5). When the pull plate (10) moves from the rightmost side to the leftmost side, it will push the vertical rod (23) to slide along the support member (5). The vertical rod (23) is slidably connected to the cover plate (17). A fourth spring (25) is fixedly connected between the cover plate (17) and the vertical rod (23). The positioning pin (26) is slidably connected to the inner wall of the cover plate (17). The end of the positioning pin (26) is wedge-shaped. The positioning groove (27) is opened on the positioning rod (7) and matches the positioning pin (26).

2. The vehicle control arm impact testing device according to claim 1, characterized in that: The locking assembly includes a lifting rod (13) provided above the pull plate (10), a sixth spring (29) fixedly connected between the lifting rod (13) and the inner wall of the crossbar (4), a horizontal groove (14) is provided on the lifting rod (13), the horizontal groove (14) is inclined and then extends horizontally to the right, a first rack rod (15) is fixedly connected on the lifting rod (13), a first one-way gear (16) is meshed below the first rack rod (15), and the first one-way gear (16) is rotatably connected to the top of the drive rod (9).

3. The vehicle control arm impact testing device according to claim 2, characterized in that: Each of the crossbars (4) is provided with a one-way limiting group, which is used to limit the sliding direction of the crossbar (4) on the limiting rod (3).

4. The vehicle control arm impact testing device according to claim 1, characterized in that: A fifth spring (28) is fixedly connected between the positioning pin (26) and the inner wall of the cover plate (17).

5. The vehicle control arm impact testing device according to claim 3, characterized in that: The one-way limiting group includes a fourth rack (30), a second one-way gear (31), and a connecting rod (32). The fourth rack (30) is fixedly connected to the side wall of the limiting rod (3). The second one-way gear (31) is rotatably connected to the connecting rod (32) and meshes with the fourth rack (30). The connecting rod (32) is slidably connected to the crossbar (4). A second cylinder (33) is fixedly connected between the connecting rod (32) and the side wall of the crossbar (4).

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