Main body of shock absorber impact testing machine

Abstract

The present invention discloses a main body of a shock absorber impact testing machine, which includes a frame, a lifting and releasing unit, an impact weight unit, and an anti-secondary impact unit. The lifting and releasing unit is arranged above the frame, and the impact weight unit is arranged below the lifting and releasing unit. The lifting and releasing unit is used to lift or release the impact weight unit. An anti-secondary impact platform is arranged on the frame below the impact weight unit, and the anti-secondary impact unit is fixed on the anti-secondary impact platform. An impact fixture for fixing a shock absorber is arranged at the lower part of the frame. The impact fixture includes a vertical impact fixture and a horizontal impact fixture. The impact fixture cooperates with the lifting and releasing unit and the impact weight unit to conduct a shock test on the shock absorber. The main body of the shock absorber impact testing machine of the present invention can not only conduct a shock test on the shock absorber assembly in the vertical direction, but also conduct a horizontal shock test on the earring welded joint of the shock absorber, and conduct vertical and horizontal shocks.

Description

Technical Field

[0001] The present invention is a main body of a shock absorber impact testing machine, belonging to the technical field of shock absorber impact testing machines. Background Art

[0002] A shock absorber is used to suppress the oscillation after the spring absorbs shock and the impact from the road surface. It is widely used in automobiles to accelerate the attenuation of the vibration of the vehicle frame and the body, so as to improve the ride comfort of the automobile. When passing through an uneven road surface, although the shock-absorbing spring can filter the vibration of the road surface, the spring itself will still have reciprocating motion, and the shock absorber is used to suppress this spring jump. In the suspension system, due to the vibration generated by the elastic element being impacted, in order to improve the ride comfort of the automobile, a shock absorber is installed in parallel with the elastic element in the suspension. To attenuate the vibration, a hydraulic shock absorber is mostly used in the automobile suspension system. Its working principle is that when the vehicle frame (or body) and the axle vibrate and relative motion occurs, the piston in the shock absorber moves up and down, and the oil in the shock absorber cavity repeatedly flows from one cavity through different pores into another cavity. At this time, the friction between the hole wall and the oil and the internal friction between the oil molecules form a damping force on the vibration, converting the vibration energy of the automobile into heat energy of the oil, and then being absorbed and dissipated into the atmosphere by the shock absorber. When the cross-sectional area of the oil passage and other factors remain unchanged, the damping force increases or decreases with the relative motion speed between the vehicle frame and the axle (or wheel), and is related to the viscosity of the oil. The shock absorber impact testing machine is used to detect the performance of the shock absorber piston rod welding lug, the oil storage cylinder welding lug, and the shock absorber assembly to resist impact under a certain impact energy and impact speed.

[0003] The existing shock absorber impact testing machine can be used in conjunction with the shock absorber for impact testing. However, in actual use, the impact method is relatively single during the use process, and the safety is poor, which is not convenient for protection. These are all practical problems that exist and need to be solved urgently. Summary of the Invention

[0004] Aiming at the deficiencies of the existing technology, a main body of a shock absorber impact testing machine with increased impact diversity and safe use is provided.

[0005] The specific technical solution of the present invention is as follows:

[0006] A main machine of a shock absorber impact testing machine comprises a frame, a lifting and releasing unit, an impact weight unit and an anti-secondary impact unit, wherein the lifting and releasing unit is arranged above the frame, and the impact weight unit is arranged below the lifting and releasing unit, and the lifting and releasing unit is used to lift or release the impact weight unit, and an anti-secondary impact platform is arranged on the frame below the impact weight unit, and the anti-secondary impact unit is fixed on the anti-secondary impact platform, and an impact fixture for fixing the shock absorber is arranged at the lower part of the frame, and the impact fixture comprises a vertical impact fixture and a horizontal impact fixture, and the impact fixture cooperates with the lifting and releasing unit and the impact weight unit to perform shock absorber impact test.

[0007] Furthermore, the lifting and releasing unit includes a lifting part, a lifting beam and a clamping part. The lifting part includes a toothed belt, a servo motor and a ball screw. The output end of the servo motor is connected to the upper end of the ball screw through the toothed belt, and the lower end of the ball screw is connected to the lifting beam. The servo motor drives the ball screw to rotate through the toothed belt, thereby driving the lifting beam to move up and down. The clamping part is arranged on the lifting beam, and the clamping part includes a clamping cylinder and a lifting claw. The output end of the clamping cylinder is connected to the lifting claw. The lifting claw is used to clamp the impact weight unit.

[0008] Furthermore, a stop cylinder and a stop pin are provided on the lifting beam, the stop cylinder and the stop pin are located below the clamping part, and the output end of the stop cylinder is connected to the stop pin.

[0009] Furthermore, the impact weight unit includes a base, a weight, an impact head, a sensor and a linear bearing. The weight is arranged above the base, the impact head is arranged below the base, the impact head is provided with a sensor, the linear bearing is arranged at the left and right ends of the base, and the linear bearing is slidably connected to the front column.

[0010] Furthermore, the anti-secondary impact unit includes a cylinder, a push-pull rod, a push-pull seat, a buffer seat and a buffer. The buffer is arranged on the buffer seat, and the push-pull seat is fixedly connected to the buffer seat. One end of the push-pull rod is connected to the output end of the cylinder, and the other end of the push-pull rod is connected to the push-pull seat. Under the action of the cylinder, the push-pull rod pushes the buffer seat to move linearly.

[0011] Furthermore, the buffer seat is provided in double groups, which are respectively located on the left and right sides of the push-pull seat. A linear guide rail is provided below the buffer seat, and the buffer seat is slidably connected to the linear guide rail.

[0012] Furthermore, the horizontal impact fixture includes a cylinder, a rotating shaft, a bearing seat, a first clamping piece and a first transition sleeve, the rotating shaft is arranged on the bearing seat, the output end of the cylinder is connected to the rotating shaft, and the clamping piece and the transition sleeve are both connected to the rotating shaft.

[0013] Furthermore, the vertical impact fixture includes a flange seat, a support rod, an impact seat, an adjustment sleeve, a transition sleeve and a clamping member. The support rod is arranged in the vertical direction of the flange seat. The adjustment sleeve, the second transition sleeve and the second clamping member are arranged on the impact seat. The impact seat is arranged above the flange seat. The top end of the support rod is connected to the adjustment sleeve. The transition sleeve is arranged inside the clamping member, and the clamping member is arranged above the adjustment sleeve.

[0014] Furthermore, an upper protective fence is arranged outside the lifting and releasing unit, the impact weight unit and the anti-secondary impact unit, and a lower protective fence is arranged outside the frame. The lower protective fence is fixedly connected to the upper protective fence.

[0015] Furthermore, a fixture placement area and a weight placement area are arranged inside the frame.

[0016] The main machine of the shock absorber impact testing machine of the present invention has the following beneficial effects:

[0017] 1: The main machine of the shock absorber impact testing machine has functions such as preventing secondary impact, is safe and convenient to use, and is simple to operate.

[0018] 2: By arranging a vertical impact fixture and a horizontal impact fixture inside the frame, the main machine of the shock absorber impact testing machine can not only conduct vertical impact tests but also horizontal impact tests, increasing the diversity of impacts. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic internal view of the main machine of the shock absorber impact testing machine of the present invention;

[0020] Figure 2 It is a schematic structural view of the main machine of the shock absorber impact testing machine of the present invention;

[0021] Figure 3 It is a schematic side view above the frame of the present invention;

[0022] Figure 4 It is a schematic structural view of the lifting and releasing unit of the present invention;

[0023] Figure 5 It is a schematic structural view of the impact weight unit of the present invention;

[0024] Figure 6 It is a schematic structural view of the anti-secondary impact unit of the present invention;

[0025] Figure 7 It is a schematic side view of the anti-secondary impact unit of the present invention;

[0026] Figure 8 It is a schematic structural view of the horizontal impact fixture of the present invention;

[0027] Figure 9This is a schematic structural diagram of the vertical impact fixture of the present invention.

[0028] In the figure: 1 - upper protective fence, 2 - lower protective fence, 3 - lifting and releasing unit, 4 - impact weight unit, 5 - anti-secondary impact unit, 6 - fixture placement area, 7 - weight placement area, 8 - anti-secondary impact platform, 8a - frame, 9 - vertical impact fixture, 10 - horizontal impact fixture, 11 - servo motor, 12 - upper limit switch bracket, 13 - lifting cross beam, 14 - rear column, 15 - ball screw, 16 - clamping cylinder, 17 - lifting gripper, 18 - stop cylinder, 19 - stop pin, 20 - linear bearing, 21 - sensor, 22 - impact head, 23 - base, 24 - weight, 25 - linear guide rail, 26 - buffer seat, 27 - buffer, 28 - push-pull seat, 29 - push-pull rod, 30 - cylinder seat, 31 - cylinder, 32 - test piece, 33 - first transition sleeve, 34 - first clamping piece, 35 - rotating shaft, 36 - bearing seat, 37 - cylinder,, 38 - second transition sleeve, 39 - second clamping piece, 40 - adjustment sleeve, 41 - impact seat, 42 - support rod, 43 - flange seat. Specific embodiments

[0029] The present invention will be further described below in conjunction with specific embodiments. Those parts not mentioned in the present invention are all prior arts.

[0030] Please refer to Figures 1 to 2 , the present invention provides a mainframe of a shock absorber impact testing machine, including a frame 8a, a lifting and releasing unit 3, an impact weight unit 4 and an anti-secondary impact unit 5. The lifting and releasing unit 3 is arranged above the frame 8a, and the impact weight unit 4 is arranged below the lifting and releasing unit 3. The lifting and releasing unit 3 is used to lift or release the impact weight unit 4. An anti-secondary impact platform 8 is arranged on the frame 8a below the impact weight unit 4. The anti-secondary impact unit 5 is fixed on the anti-secondary impact platform 8. An impact fixture for fixing the shock absorber is arranged at the lower part of the frame 8a. The impact fixture is composed of a vertical impact fixture 9 and a horizontal impact fixture 10, which is convenient for multi-angle impact. The impact fixture cooperates with the lifting and releasing unit and the impact weight unit to conduct a shock absorber impact test. For the mainframe of the shock absorber impact testing machine of the present invention, firstly, an upper protective fence 1 is arranged outside the lifting and releasing unit 3, the impact weight unit 4 and the anti-secondary impact unit 5. Secondly, a lower protective fence 2 is arranged outside the frame 8a. The lower protective fence 2 is fixedly connected with the upper protective fence 1; the stability and anti-impact ability are increased, and the use safety is improved at the same time. A fixture placement area 6 and a weight placement area 7 are arranged inside the frame. The arrangement of the fixture placement area 6 is convenient for the placement of the fixture, and the arrangement of the weight placement area 7 is convenient for the placement of the weight.

[0031] See Figures 1 to 4, the lifting and releasing unit includes a lifting part, a lifting crossbeam 13 and a gripping part. The lifting part includes a toothed belt 10, a servo motor 11 and a ball screw 15. The output end of the servo motor 11 is drivingly connected to the upper end of the ball screw 15 through the toothed belt 10. The lower end of the ball screw 15 is connected to the lifting crossbeam 13. The servo motor 11 drives the ball screw 15 to rotate through the toothed belt 10, driving the lifting crossbeam 13 to move up and down. The gripping part is arranged on the lifting crossbeam 13 and includes a clamping cylinder 16 and a lifting gripper 17. The output end of the clamping cylinder 16 is connected to the lifting gripper 17. The clamping cylinder 16 is a normally closed cylinder, and the lifting gripper 17 is used to grip the impact weight unit. An upper limit switch bracket 12 is arranged on the side of the ball screw 15. A stop cylinder 18 and a stop pin 19 are also arranged on the lifting crossbeam 13. The stop cylinder 18 and the stop pin 19 are located below the gripping part. The output end of the stop cylinder is connected to the stop pin. By arranging a stop pin, which is dragged by the stop cylinder, when the gripper grips in place, the stop pin extends, and only then can the gripping part move upward, which can prevent the weight from accidentally falling during the upward movement. Before the weight is released, the stop pin retracts, further improving the safety performance.

[0032] In the lifting and releasing unit of the present invention, first, a toothed belt and a ball screw are arranged to cooperate with each other for easy lifting and operation. Second, considering the safety of the equipment, the action of the clamping cylinder is designed to be normally closed, that is, the releasing action can only be carried out when it is powered on, to prevent the weight from falling when suddenly powered off. In addition, a safety protection link is also arranged in this part. This link is a stop pin, which is dragged by a cylinder. When the lifting gripper 5 grips in place, the stop pin 7 extends, and only then can the gripping part move upward, which can prevent the weight from accidentally falling during the upward movement. Before the weight is released, the stop pin retracts.

[0033] See Figure 5 , the impact weight unit includes a base 23, a weight 24, an impact head 22, a sensor 21 and a linear bearing 20. The weight 24 is arranged above the base 23. The impact head 22 is arranged below the base 23. A sensor 21 is arranged on the impact head 22. The linear bearings 20 are arranged at the left and right ends of the base 23.

[0034] See Figure 6 and Figure 7The anti-secondary impact unit includes a cylinder 31, a push-pull rod 29, a push-pull seat 28, a buffer seat 26 and a buffer 27. The cylinder 31 is fixed on the cylinder seat 30, the buffer 27 is arranged on the buffer seat 26, the push-pull seat 28 is fixedly connected to the buffer seat 26, one end of the push-pull rod 29 is connected to the output end of the cylinder 31, and the other end of the push-pull rod 29 is connected to the push-pull seat 28. Under the action of the cylinder, the push-pull rod pushes the buffer seat to move linearly. The buffer seat is arranged in two groups, which are respectively located on the left and right sides of the push-pull seat 28. A linear guide rail 25 is arranged below the buffer seat 26, and the buffer seat 26 is slidably connected to the linear guide rail 25.

[0035] The anti-secondary impact unit of the present invention firstly provides a linear guide rail under the two groups of buffer seats to facilitate the reception of the weights, and the hard rubber material also ensures the buffering force. Secondly, when the rebound height of the impact weight exceeds the allowed height (with a switch detection), the cylinder pushes the buffer seat to move forward quickly on the linear guide rail to catch the weight that falls after the rebound, so that it will no longer act on the test piece, thereby ensuring safety.

[0036] See also Figure 8 The horizontal impact fixture includes a cylinder 37, a rotating shaft 35, a bearing seat 36, a first clamp 34 and a first transition sleeve 33. The rotating shaft 35 is arranged on the bearing seat 36. The output end of the cylinder 37 is connected to the rotating shaft 35. The first clamp 34 and the first transition sleeve 33 are both connected to the rotating shaft 35. For the horizontal impact test piece 32, the first transition sleeve 33 should be selected according to the outer diameter of the liquid storage cylinder or the piston rod, the impact position of the shock absorber should be visually adjusted, and the test piece 32 should be fixed to the rotating shaft 35 with the first clamp 34 and the first transition sleeve 33 to complete the installation operation of the test piece 32.

[0037] See also Figure 9 The vertical impact clamp includes a flange seat 43, a support rod 42, an impact seat 41, an adjustment sleeve 40, a second transition sleeve 38 and a second clamping piece 39. The support rod 42 is arranged in the vertical direction of the flange seat 43. The adjustment sleeve 40, the second transition sleeve 38 and the second clamping piece 39 are arranged on the impact seat 41. The impact seat 41 is arranged above the flange seat 43. The top end of the support rod 42 is connected to the adjustment sleeve 40. The second transition sleeve 38 is arranged in the second clamping piece 39. The second clamping piece 39 is arranged above the adjustment sleeve 40. For the vertical impact specimen 32, the second transition sleeve 38 should be selected according to the outer diameter of the liquid storage cylinder, the support rod 42 should be selected according to the working length (impact length) of the shock absorber, the support rod 42 should be fixed to the flange seat 43, the adjustment sleeve 40 and the impact seat 41 should be screwed on, the specimen should be placed on the impact seat 41, and the adjustment sleeve 40 should be adjusted according to the height requirement. After adjustment, the specimen 32 should be fixed to the impact seat 41 with the second clamping piece 39 and the second transition sleeve 38 to complete the installation operation of the specimen.

[0038] The present invention can not only conduct the impact test of the shock absorber assembly in the vertical direction, but also conduct the horizontal impact test of the shock absorber earring weld joint. By setting up a frame-type machine rack for vertical and horizontal impacts, the stability is increased, the structure is simple, and it is easy to implement.

[0039] In addition, it should be understood that although this specification is described according to the embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A main machine of a vibration absorber impact testing machine, It is characterized in that The invention comprises a frame, a lifting and releasing unit, an impact weight unit and an anti-secondary impact unit, wherein the lifting and releasing unit is arranged above the frame, the impact weight unit is arranged below the lifting and releasing unit, the lifting and releasing unit is used to lift or release the impact weight unit, an anti-secondary impact platform is arranged on the frame below the impact weight unit, the anti-secondary impact unit is fixed on the anti-secondary impact platform, an impact fixture for fixing the shock absorber is arranged at the lower part of the frame, the impact fixture comprises a vertical impact fixture and a horizontal impact fixture, the impact fixture cooperates with the lifting and releasing unit and the impact weight unit to perform the shock absorber impact test, the anti-secondary impact unit comprises a cylinder, a push-pull rod, a push-pull A seat, a buffer seat and a buffer, the buffer is arranged on the buffer seat, the push-pull seat is fixedly connected to the buffer seat, one end of the push-pull rod is connected to the output end of the cylinder, and the other end of the push-pull rod is connected to the push-pull seat. Under the action of the cylinder, the push-pull rod pushes the buffer seat to make a linear motion. The buffer seat is arranged in double groups, which are respectively located on the left and right sides of the push-pull seat. A linear guide rail is arranged under the buffer seat, and the buffer seat is slidably connected to the linear guide rail. The horizontal impact clamp includes a first cylinder, a rotating shaft, a bearing seat, a first clamping piece and a first transition sleeve. The rotating shaft is arranged on the bearing seat, the output end of the first cylinder is connected to the rotating shaft, and the clamping piece and the transition sleeve are both connected to the rotating shaft.

2. The shock absorber impact testing machine according to claim 1, It is characterized in that The lifting and releasing unit comprises a lifting part, a lifting beam and a clamping part. The lifting part comprises a toothed belt, a servo motor and a ball screw. The output end of the servo motor is connected to the upper end of the ball screw through the toothed belt. The lower end of the ball screw is connected to the lifting beam. The servo motor drives the ball screw to rotate through the toothed belt, thereby driving the lifting beam to move up and down. The clamping part is arranged on the lifting beam. The clamping part comprises a clamping cylinder and a lifting claw. The output end of the clamping cylinder is connected to the lifting claw. The lifting gripper is used to hold the impact weight unit.

3. The shock absorber impact testing machine host according to claim 2, It is characterized in that A stop cylinder and a stop pin are also provided on the lifting beam. The stop cylinder and the stop pin are located below the clamping part, and the output end of the stop cylinder is connected to the stop pin.

4. The shock absorber impact testing machine according to any one of claims 1 to 3, It is characterized in that The impact weight unit includes a base, a weight, an impact head, a sensor and a linear bearing. The weight is arranged above the base, the impact head is arranged below the base, a sensor is arranged on the impact head, and the linear bearing is arranged at the left and right ends of the base. The linear bearing is slidably connected to the front column.

5. The main machine of the vibration absorber impact testing machine according to claim 1, It is characterized in that The vertical impact fixture includes a flange seat, a support rod, an impact seat, an adjustment sleeve, a transition sleeve and a clamping member. The support rod is arranged in the vertical direction of the flange seat. The adjustment sleeve, the second transition sleeve and the second clamping member are arranged on the impact seat. The impact seat is arranged above the flange seat. The top end of the support rod is connected to the adjustment sleeve. The transition sleeve is arranged inside the clamping member, and the clamping member is arranged above the adjustment sleeve.

6. The main body of the shock absorber impact testing machine according to claim 1, characterized in that an upper protective fence is arranged outside the lifting and releasing unit, the impact weight unit and the anti-secondary impact unit, and a lower protective fence is arranged outside the frame. The lower protective fence is fixedly connected to the upper protective fence.

7. The main body of the shock absorber impact testing machine according to claim 1, characterized in that a fixture placement area and a weight placement area are arranged inside the frame.

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