A double-lifting lug shock absorber dynamometer

Abstract

The utility model provides a kind of double lug shock absorber dynamometer, belong to shock absorber manufacturing technical field, double lug shock absorber dynamometer, including rack, further include: positioning tool, the positioning tool is for vertical fixed workpiece on rack;Pressing mechanism, the pressing mechanism includes first driving part, is located in the pressing seat of first driving part output end and can be along the vertical movement of rack and is used for the pressing assembly of the radial fixed workpiece of setting in pressing seat inboard;And servo loading mechanism, the servo loading mechanism includes the second driving part of setting in the top of rack and is used for the clamping assembly of clamping workpiece lug of setting in the output end of second driving part;The utility model utilizes positioning tool to carry out circumferential fixed workpiece, workpiece is vertically pressed by first driving part drive pressing seat, and utilizes clamping assembly to realize the stable clamping of lug, to carry out stable demonstration power detection subsequently, thus can satisfy the demonstration power detection demand of double lug shock absorber.

Description

Technical Field

[0001] This utility model relates to the field of shock absorber manufacturing technology, specifically to a double-lug shock absorber indicator mechanism. Background Technology

[0002] A shock absorber dynamometer, also known as a shock absorber test bench or damper performance tester, is a professional device used to test the dynamic performance of shock absorbers. It measures parameters such as damping force, velocity, and displacement of the shock absorber by simulating the reciprocating motion of the shock absorber during actual operation, in order to evaluate the performance and quality of the shock absorber.

[0003] Shock absorbers can be categorized into single-ear and double-ear shock absorbers based on the number of hangers. A double-ear shock absorber is characterized by hanger connections at both ends. Its design allows for hinged connections to the vehicle body and suspension components via the hangers at both ends, enabling the shock absorber to swing freely during operation to accommodate multi-directional forces. It is commonly used in automotive suspensions and construction machinery. Current indicator motors are primarily suited for performance testing of single-ear shock absorbers. This involves clamping the piston rod of a single-ear shock absorber and causing it to move up and down to achieve the indication of dynamism. However, because double-ear shock absorbers have hangers on the top of the piston rod, traditional indicator motors cannot effectively clamp the piston rod with hangers, thus failing to meet the clamping requirements of double-ear shock absorbers and affecting the effectiveness of dynamism testing. Therefore, a new indicator motor suitable for double-ear shock absorbers needs to be designed. Utility Model Content

[0004] This utility model provides a dynamometer for a double-ear shock absorber. It uses a positioning fixture to fix the workpiece circumferentially, drives the clamping seat to clamp the workpiece vertically through the first driving component, and uses a clamping assembly to achieve stable clamping of the lifting lugs, so that the subsequent dynamometer test can be carried out stably. Therefore, it can meet the dynamometer test requirements of the double-ear shock absorber.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0006] A double-lug shock absorber indicator machine includes a frame and further includes:

[0007] A positioning fixture, used to vertically fix the workpiece on the machine frame;

[0008] The clamping mechanism includes a first driving member, a clamping seat located at the output end of the first driving member and capable of vertical movement along the frame, and a clamping assembly disposed inside the clamping seat for radially fixing the workpiece; and

[0009] A servo loading mechanism, comprising a second drive member disposed on the top of the frame and a clamping assembly disposed at the output end of the second drive member and used for clamping workpiece lifting lugs.

[0010] Preferably, the positioning fixture includes a mounting base disposed on the frame and an auxiliary clamping mechanism disposed on the mounting base.

[0011] Preferably, the auxiliary clamping mechanism includes a clamping seat fixed to the top of the mounting base, two clamping cylinders disposed opposite each other on the clamping seat, and a gripper disposed at the output end of the clamping cylinder.

[0012] Preferably, the inner clamping part of the gripper is provided with a clamping groove that cooperates with the outer cylinder of the workpiece.

[0013] Preferably, the positioning fixture further includes a lifting mechanism fixedly mounted on the side wall of the frame for driving the mounting base to move vertically along the frame.

[0014] Preferably, the first driving component is a hydraulic cylinder, and the clamping assembly includes a clamping cylinder disposed on the inner side of the clamping seat and a clamping block disposed at the output end of the clamping cylinder.

[0015] Preferably, the inner side of the clamping block is provided with a clamping groove that cooperates with the piston rod of the workpiece.

[0016] Preferably, the second driving component is a servo electric cylinder, and the clamping assembly includes a clamping drive source disposed at the output end of the servo electric cylinder, a clamping link disposed at the output end of the servo electric cylinder and driven to rotate by the clamping drive source, and a clamping block disposed at the end of the clamping link.

[0017] Preferably, the output end of the servo electric cylinder is fixedly provided with a limit cylinder, the clamping drive source is provided inside the limit cylinder, the clamping linkage is rotatably provided on the limit cylinder, and the output end of the clamping drive source is fixedly provided with a drive column for driving the clamping linkage to rotate and open.

[0018] Preferably, the frame includes a frame base plate and a frame top plate arranged opposite to each other, and a plurality of columns disposed between the frame base plate and the frame top plate.

[0019] As can be seen from the above technical solutions, this utility model has the following beneficial effects:

[0020] 1. In this utility model, the first driving component drives the clamping seat to move to the middle position between the dust cover of the outer cylinder of the product and the lifting ring. The clamping assembly then clamps and fixes the piston connecting rod of the shock absorber. Afterward, the first driving component further drives the clamping seat to press down until it contacts the dust cover to clamp the product. The second driving component drives the clamping assembly to move down to the top lifting lug position of the double-lifting-lug shock absorber. The clamping assembly clamps and fixes the lifting lug. Then, the second driving component drives the piston connecting rod to move up and down to perform dynamometer testing. In this utility model, the positioning fixture is used to fix the workpiece circumferentially, the first driving component drives the clamping seat to clamp the workpiece vertically, and the clamping assembly is used to achieve stable clamping of the lifting lug, so that the subsequent dynamometer testing can be carried out stably. Therefore, it can meet the dynamometer testing requirements of the double-lifting-lug shock absorber.

[0021] 2. In this utility model, when the clamping drive source drives the drive column to extend and retract, it can drive the clamping connecting rods on both sides to rotate. In this way, when the clamping blocks at the ends of the driving clamping connecting rods approach each other, the shock absorber lugs can be clamped. At the same time, the clamping blocks can be set to be semi-circular to fit the shape of the lugs. When the clamping blocks on both sides are engaged, they can form an integral structure that wraps around the outside of the lugs, thereby improving the compatibility with the lugs and facilitating the stable performance of subsequent power indicator tests. Attached Figure Description

[0022] Figure 1 This is a front view of the present invention;

[0023] Figure 2 This is a side view of the present invention;

[0024] Figure 3 for Figure 1 A magnified view of part A in the middle;

[0025] Figure 4 for Figure 1 A magnified view of part B in the middle section;

[0026] Figure 5 This is a schematic diagram showing the connection between the lifting motor and the lifting screw.

[0027] Figure 6 This is a schematic diagram of the connection between the drive column and the clamping link;

[0028] Figure 7 This is a schematic diagram of the connection between the clamping cylinder and the clamping block.

[0029] In the diagram: 10, frame; 110, frame base plate; 120, frame top plate; 130, column; 141, base plate; 142, lifting motor; 143, lifting screw; 144, lifting screw flange; 145, guide cylinder; 210, mounting base; 211, guide sleeve; 221, clamping base; 222, clamping cylinder; 223, gripper; 310, hydraulic cylinder; 320, pressing base; 331, pressing cylinder; 332, pressing block; 410, servo electric cylinder; 421, clamping connecting rod; 422, clamping block; 423, limit cylinder; 424, drive column; 50, displacement sensor. Detailed Implementation

[0030] A preferred embodiment of the present invention will now be described in detail with reference to the accompanying drawings.

[0031] To achieve the above objectives, the embodiments of this utility model adopt the following technical solutions: (Refer to...) Figure 1 , Figure 2A double-lug shock absorber indicator machine includes a frame 10, a positioning fixture, a clamping mechanism, and a servo loading mechanism. The frame 10 includes a frame base plate 110 and a frame top plate 120 arranged opposite each other, and several columns 130 disposed between the frame base plate and the frame top plate. This allows the frame base plate, frame top plate, and columns to form the main structure of the frame, facilitating the installation of other mechanisms of the indicator machine. Furthermore, the positioning fixture is disposed on the frame 10 for vertically fixing the workpiece to the frame 10. The clamping mechanism includes a first driving member, a clamping seat 320, and a clamping assembly. The clamping seat 320 is disposed at the output end of the first driving member and can move vertically along the frame under the drive of the first driving member. The clamping assembly is disposed inside the clamping seat for radially fixing the workpiece. The servo loading mechanism includes a second driving member and a clamping assembly. The second driving member is disposed at the top of the frame 10, and the clamping assembly is disposed at the output end of the second driving member. The lifting lugs used for clamping workpieces are used by placing the double-lug shock absorber on the positioning fixture and fixing it in place. The first drive unit drives the clamping seat and clamping assembly to move to the middle position between the dust cover of the outer cylinder of the product and the lifting ring. The clamping assembly then clamps and fixes the piston rod of the shock absorber. The first drive unit then further drives the clamping seat to press down until it contacts the dust cover to clamp the product. The second drive unit drives the clamping assembly to move down to the top lug position of the double-lug shock absorber. The clamping assembly clamps and fixes the lifting lug. Then the second drive unit… The piston rod is moved up and down to perform a power indication test. After the test is completed, the clamping assembly releases its grip on the lifting lug. The second drive unit drives the clamping assembly to reset, and the first drive unit drives the pressure seat to move back to the position between the dust cover of the outer cylinder and the lifting ring. The pressure assembly releases its grip on the piston rod, and then the first drive unit drives the pressure seat to move up and reset. The positioning fixture releases its fixation on the outer cylinder of the shock absorber. This completes the power indication test of a single double-lifting-lug shock absorber. The next workpiece can then be loaded and unloaded.

[0032] When in use, the positioning fixture can fix the workpiece circumferentially, and the clamping seat can clamp the product vertically when it is pressed down to contact the dust cover. The combination of the two can achieve the effect of stabilizing and fixing the shock absorber.

[0033] It should be noted that the dynamometer of the double-lug shock absorber in this embodiment is the same as the existing dynamometer, capable of comparing the recorded product dynamometer graph, upper and lower limits with standard values. If it is within the specified range, the result is judged as "OK"; if it exceeds the range, the result is judged as "NG" and an alarm is triggered. As this is prior art, it will not be described in detail here.

[0034] Reference Figure 1 , Figure 4As a preferred technical solution in this embodiment, the positioning fixture includes a mounting base 210 and an auxiliary clamping mechanism. The mounting base 210 is mounted on the frame 10, and the auxiliary clamping mechanism is mounted on the mounting base. Further, the auxiliary clamping mechanism includes a clamping seat 221, a clamping cylinder 222, and a clamping claw 223. The clamping seat 221 is fixedly mounted on the top of the mounting base 210. There are two clamping cylinders 222, and the two clamping cylinders are arranged opposite to each other on the clamping seat. The clamping claw 223 is located at the output end of the clamping cylinder. In use, the shock absorber to be tested is placed on the mounting base, and the clamping cylinders on both sides are activated to drive the clamping claws on both sides to clamp and fix the outer cylinder of the shock absorber.

[0035] Furthermore, in order to improve the clamping and fixing effect of the gripper 223 on the shock absorber, a clamping part is provided on the inner side of the gripper 223, and a clamping groove is provided on the clamping part to cooperate with the outer cylinder of the workpiece. In this way, when the two grippers are driven to approach each other by the clamping cylinder, the clamping groove can be used to clamp and fix the outer cylinder of the shock absorber.

[0036] Reference Figure 1 , Figure 2 , Figure 5 In some embodiments, the positioning fixture further includes a lifting mechanism, which is fixedly mounted on the side wall of the frame 10 and is used to drive the mounting base 210 to move vertically along the frame 10. Further, the lifting mechanism includes a base plate 141, a lifting motor 142, a worm gear assembly, a lifting screw 143, a lifting screw flange 144, and a guide cylinder 145. The base plate 141 is fixedly mounted on the column 130 of the frame 10, the lifting motor is fixedly mounted on the base plate, the worm gear assembly is located at the output end of the lifting motor, and the lifting screw 143 is spirally telescopically located at the output end of the worm gear assembly. The worm gear assembly includes a housing, a worm, a worm wheel, and other components. The worm is fixedly connected to the output shaft of the lifting motor, and the worm wheel meshes with the worm. Both the worm and the worm wheel rotate via bearings. The lifting screw 143 is located inside the housing. The worm gear cavity is machined with an internal thread matching the lifting screw 143. The lifting screw flange 144 is fixedly mounted on the top of the lifting screw 143 and is fixedly connected to the bottom of the mounting base 210. The guide cylinder 145 is fixedly mounted on the frame 10, with the lifting screw positioned inside the guide cylinder. In use, the outer wall of the lifting screw is threadedly connected to the inner side of the worm gear, and the bottom end of the lifting screw is placed inside the guide cylinder. When the lifting motor drives the worm gear to rotate, the worm gear in turn drives the worm wheel to rotate. Because the lifting screw is threadedly connected to the worm wheel, and the mounting base 210 is confined to the column, the rotation of the worm wheel can drive the lifting screw to move vertically along the guide cylinder, thereby moving the mounting base vertically along the frame to achieve the purpose of lifting and lowering the workpiece on the positioning fixture.

[0037] Furthermore, in order to facilitate the movement of the mounting base 210 along the frame 10, a guide sleeve 211 is fixedly provided on the outside of the mounting base 210. At the same time, the guide sleeve 211 is fitted on the outside of the column 130. In this way, under the action of the lifting mechanism, the mounting base can be driven to move vertically along the frame.

[0038] Reference Figure 1 , Figure 7 In some embodiments, the first driving component is a hydraulic cylinder 310. Further, the clamping assembly includes a clamping cylinder 331 and a clamping block 332. The number of clamping cylinders 331 can be set to two, and the two clamping cylinders are fixedly arranged in a relative manner on the inner side of the clamping seat 320. The clamping block 332 is fixedly arranged at the output end of the clamping cylinder. In this way, when it is necessary to clamp and fix the outer wall of the shock absorber piston connecting rod by the clamping block, the clamping cylinders on both sides can be used to drive the clamping block to fix the connecting rod.

[0039] Meanwhile, in order to facilitate the installation of the clamping components, an installation groove is provided inside the clamping seat 320, and the aforementioned clamping cylinder 331 and clamping block 332 are arranged symmetrically on the inner wall of the installation groove.

[0040] Furthermore, in order to improve the clamping stability of the clamping block 332 on the piston connecting rod, a clamping groove that cooperates with the workpiece piston connecting rod is provided on the inner side of the clamping block 332. In this way, during operation, the clamping groove can be used to contact the outer wall of the piston connecting rod to achieve the purpose of stable clamping.

[0041] Reference Figure 1 , Figure 2 , Figure 3 , Figure 6 In some embodiments, the second driving component is a servo electric cylinder 410. The clamping assembly includes a clamping drive source, a clamping link 421, and a clamping block 422. The clamping drive source is fixedly disposed at the output end of the servo electric cylinder. It should be noted that the clamping drive source in this embodiment is a cylinder. The clamping link 421 is rotatably disposed at the output end of the servo electric cylinder, and the clamping link can be driven to rotate by the clamping drive source. The clamping block 422 is disposed at the end of the clamping link. In use, the clamping drive source is activated to drive the clamping links on both sides to rotate. When the rotating clamping link drives the clamping blocks on both sides to approach, it can achieve clamping and fixing of the shock absorber lifting ring.

[0042] Furthermore, refer to Figure 1 , Figure 3The output end of the servo electric cylinder 410 is fixedly provided with a limiting cylinder 423. The clamping drive source is located inside the limiting cylinder 423. At the same time, the clamping connecting rod is rotatably located at the bottom end of the limiting cylinder 423. A drive column 424 for driving the clamping connecting rod 421 to rotate and open is fixedly provided at the output end of the clamping drive source. It should be noted that the drive column in this embodiment is a tapered column, and the size of the tapered column gradually decreases along the direction away from the clamping drive source. Meanwhile, the clamping connecting rods on both sides are hinged to the limiting cylinder in an inclined manner. That is, the ends of the clamping connecting rods on both sides that are close to the drive column are close to each other, and the ends that are far away from the drive column are far away from each other. When the drive column extends under the action of the clamping drive source, it can drive the ends of the clamping connecting rods on both sides that are close to the drive column to gradually separate, while the ends of the clamping connecting rods on both sides that are far away from the drive column gradually move closer. This can drive the clamping blocks on both sides to move closer, so as to achieve clamping and fixing of the shock absorber lifting ring.

[0043] Furthermore, since the shock absorber ring is circular in shape, the clamping block 422 in this embodiment is semi-circular in order to achieve stable clamping of the ring. When the semi-circular clamping blocks on both sides come close together, they can be snapped together on the outside of the ring to achieve stable clamping of the ring.

[0044] In addition, in order to detect the displacement stroke of the shock absorber piston rod, a displacement sensor 50 is provided between the output end of the servo cylinder 410 and the top of the clamping assembly. In this way, when the servo cylinder drives the shock absorber piston rod to move up and down for power indication detection, the displacement process of the piston rod can be detected by the displacement sensor.

[0045] In use, the workpiece is manually placed on the positioning fixture. The clamping cylinder 222 drives the gripper 223 to automatically clamp the outer cylinder of the workpiece. The hydraulic cylinder 310 drives the pressing seat 320 to descend to the middle position between the dust cover and the lifting ring of the outer cylinder of the product. The pressing cylinder 331 drives the two pressing blocks 332 on both sides to symmetrically press the piston rod of the shock absorber. Then the pressing seat 320 continues to press down to the dust cover to press the product. The servo electric cylinder 410 drives the clamping assembly to descend to the top position of the lifting ring. The clamping drive source drives the clamping connecting rod 421 to rotate, so that the clamping block 422 clamps the lifting ring of the product. The servo electric cylinder 410 operates at a preset speed. The test begins with the amplitude and distance. After the test is completed, the servo cylinder 410 automatically rises to the clamping position of the lifting ring, and the clamping block 422 releases the clamping of the lifting ring. The servo cylinder 410 continues to rise until it reaches the standby position and stops. At the same time, the clamping cylinder 331 opens the clamping block 332, and the hydraulic cylinder 310 drives the clamping seat 320 back to the initial position. The clamping cylinder 222 drives the gripper 223 to release. The recorded product indicator graphic, upper and lower limits are compared with the standard values. If it is within the specified range, the result is judged as "OK". If it exceeds the range, the result is judged as "NG" and an alarm is triggered.

[0046] The above-described embodiments are merely preferred embodiments of the present utility model and are not intended to limit the scope of the present utility model. Various modifications and improvements made by those skilled in the art to the technical solutions of the present utility model without departing from the spirit of the present utility model should fall within the protection scope defined by the claims of the present utility model.

Claims

1. A double-lug shock absorber indicator machine, comprising a frame (10), characterized in that, Also includes: A positioning fixture is used to vertically fix the workpiece on the frame (10); A clamping mechanism, comprising a first driving member, a clamping seat (320) disposed at the output end of the first driving member and capable of vertical movement along the frame, and a clamping assembly disposed inside the clamping seat for radially fixing the workpiece; and The servo loading mechanism includes a second drive member disposed on the top of the frame (10) and a clamping assembly disposed at the output end of the second drive member for clamping the workpiece lifting lug.

2. The double-lug shock absorber indicator machine according to claim 1, characterized in that, The positioning fixture includes a mounting base (210) mounted on the frame (10) and an auxiliary clamping mechanism mounted on the mounting base.

3. The double-lug shock absorber indicator machine according to claim 2, characterized in that, The auxiliary clamping mechanism includes a clamping seat (221) fixed on the top of the mounting base (210), two clamping cylinders (222) arranged opposite to each other on the clamping seat, and a clamping claw (223) arranged at the output end of the clamping cylinder.

4. The double-lug shock absorber indicator machine according to claim 3, characterized in that, The inner clamping part of the gripper (223) is provided with a clamping groove that cooperates with the outer cylinder of the workpiece.

5. The double-lug shock absorber indicator machine according to claim 2, characterized in that, The positioning fixture also includes a lifting mechanism fixedly installed on the side wall of the frame (10) for driving the mounting base (210) to move vertically along the frame (10).

6. The double-lug shock absorber indicator machine according to claim 1, characterized in that, The first driving component is a hydraulic cylinder (310), and the clamping assembly includes a clamping cylinder (331) disposed on the inner side of the clamping seat (320) and a clamping block (332) disposed at the output end of the clamping cylinder.

7. The double-lug shock absorber indicator machine according to claim 6, characterized in that, The inner side of the clamping block (332) is provided with a clamping groove that cooperates with the piston rod of the workpiece.

8. The double-lug shock absorber indicator machine according to claim 1, characterized in that, The second driving component is a servo electric cylinder (410). The clamping assembly includes a clamping drive source disposed at the output end of the servo electric cylinder, a clamping link (421) rotatably disposed at the output end of the servo electric cylinder and driven to rotate by the clamping drive source, and a clamping block (422) disposed at the end of the clamping link.

9. The double-lug shock absorber indicator machine according to claim 8, characterized in that, The output end of the servo electric cylinder (410) is fixedly provided with a limit cylinder (423), the clamping drive source is provided inside the limit cylinder (423), the clamping link is rotatably provided on the limit cylinder (423), and the output end of the clamping drive source is fixedly provided with a drive column (424) for driving the clamping link (421) to rotate and open.

10. The double-lug shock absorber indicator machine according to claim 1, characterized in that, The frame (10) includes a frame base plate (110) and a frame top plate (120) arranged opposite to each other, and a number of columns (130) disposed between the frame base plate and the frame top.

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