A shock absorber indicator mechanism

Abstract

This utility model provides a shock absorber dynamometer, belonging to the field of shock absorber manufacturing technology. The shock absorber dynamometer includes a frame and a changing fixture, which is mounted on the frame for vertically fixing the product. The clamping fixture includes a clamping drive source and a pressing component mounted at the output end of the clamping drive source for vertically clamping the product. The servo loading mechanism includes a servo drive source and a clamping fixture mounted at the output end of the servo drive source for circumferentially clamping the piston rod of the product. The changing fixture includes a fixture base mounted on the frame, a fixture plate fixed to the top of the fixture base, and a gripper assembly fixed to the top of the fixture plate. This utility model clamps and fixes the piston rod by the clamping fixture, avoiding relative sliding displacement between the rod and the equipment during the reciprocating movement of the driven rod, thereby simulating the actual vibration condition and facilitating stable subsequent dynamometer testing, ultimately improving the final measurement results.

Description

Technical Field

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

[0002] The automotive shock absorber indicator machine, also known as an automotive shock absorber test bench or damper performance testing system, is a device specifically designed to test the dynamic performance of automotive suspension shock absorbers. It mainly measures parameters such as damping force, displacement, and velocity of the shock absorber by simulating the vibration conditions of a vehicle during driving. It can also generate indicator diagrams and velocity characteristic curves during the testing process to evaluate whether the performance of the shock absorber meets the design requirements.

[0003] Based on the number of lifting lugs in the shock absorber, it can be divided into single-lug shock absorbers and double-lug shock absorbers. For single-lug shock absorbers, the lifting lugs are located at the bottom of the outer cylinder. When performing dynamometer testing on a single-lug shock absorber, the shock absorber is usually vertically fixed inside the machine. The piston rod is clamped by the equipment and driven to move up and down to achieve the purpose of dynamometer testing. However, the top of the shock absorber piston rod is a threaded rod, and there is a reciprocating motion process during dynamometer testing. During this motion, the relative sliding displacement between the piston rod and the equipment is easily caused, which cannot simulate the actual vibration conditions. This affects the accurate measurement of the shock absorber damping force and piston rod displacement, and thus affects the final measurement results. Utility Model Content

[0004] This utility model provides a shock absorber dynamometer, which clamps and fixes the piston connecting rod by a clamping fixture to avoid relative sliding displacement between the connecting rod and the equipment during the reciprocating movement of the driving connecting rod, so as to simulate the actual vibration condition and ensure stable subsequent dynamometer testing, thereby improving the final measurement results.

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

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

[0007] A product changing fixture is mounted on a machine frame and is used to vertically fix the product.

[0008] The clamping fixture includes a clamping drive source and a pressing component disposed at the output end of the clamping drive source for vertically clamping the product; and

[0009] A servo loading mechanism, comprising a servo drive source and a clamping fixture disposed at the output end of the servo drive source for circumferentially clamping the piston rod of the product.

[0010] Preferably, the changeover fixture includes a fixture base mounted on the frame, a fixture plate fixed to the top of the fixture base, and a gripper assembly fixed to the top of the fixture plate.

[0011] Preferably, the gripper assembly includes a mounting base fixed to the top of the tooling plate, gripper cylinders arranged opposite to each other on both sides of the mounting base, and a clamping block disposed at the output end of the gripper cylinders.

[0012] Preferably, the clamping surface of the clamping block is provided with a clamping groove that is adapted to the outer wall of the product's outer cylinder.

[0013] Preferably, the pressing drive source is a hydraulic cylinder, and the pressing assembly includes a pressing seat that is vertically slidably mounted on the frame and a pressing cylinder that is fixedly mounted inside the pressing seat.

[0014] Preferably, the frame includes a base plate, a top plate opposite to the base plate, and a plurality of guide columns arranged parallel between the base plate and the top plate.

[0015] Preferably, a plurality of guide sleeves are fixedly provided on the periphery of the clamping seat, and the guide sleeves are slidably disposed on the outside of the guide post.

[0016] Preferably, the servo drive source is a servo electric cylinder, and the clamping fixture includes a housing, an end cap fixed on the top of the housing, a core extending axially from the end cap to the inner side of the housing, a top core slidably and sealingly connected to the inner cavity of the core core, a conical chuck sleeved on the outer side of the bottom end of the top core, and a moving piston slidably disposed in the inner cavity of the housing for driving the conical chuck to close.

[0017] Preferably, the bottom end of the moving piston is provided with an inner conical surface that mates with the outer wall of the conical chuck.

[0018] As can be seen from the above technical solutions, this utility model has the following beneficial effects:

[0019] 1. In this utility model, the changing fixture fixes the outer cylinder of the product radially, the clamping fixture fixes the outer cylinder of the product vertically, and the clamping fixture in the servo loading mechanism can effectively clamp the threaded section of the piston rod of the product. In this way, by clamping and fixing the product in multiple dimensions, the fixing effect of the product can be effectively improved, and the relative sliding displacement between the connecting rod and the equipment can be avoided during the reciprocating movement of the driving connecting rod, so as to achieve the effect of simulating the actual vibration condition, which facilitates the subsequent stable performance testing, and thus improves the final measurement results.

[0020] 2. In this utility model, the clamping fixture includes a housing, an end cap, a core column, a top core, a conical chuck, and a moving piston. When clamping the threaded section of the piston rod of the product, the clamping fixture is driven to move towards the piston rod by a servo electric cylinder. The piston rod enters the inner side of the conical chuck and pushes the top core to move axially along the inner cavity of the core column. After the top core moves into place, the air passage supplies air into the housing to push the moving piston towards the conical chuck. As the moving piston contacts the outer side of the conical chuck, it drives the conical chuck to contract to clamp the threaded section of the piston rod. Thus, stable clamping and fixing of the piston rod can be achieved. Attached Figure Description

[0021] Figure 1 This is a front view of the present invention;

[0022] Figure 2 for Figure 1 A magnified view of part A in the middle;

[0023] Figure 3 for Figure 1 Sectional view of section C-C;

[0024] Figure 4 A schematic diagram showing the connection between the clamping fixture and the weighing sensor;

[0025] Figure 5 for Figure 4 Sectional view of section AA.

[0026] In the diagram: 10, frame; 110, frame base plate; 120, frame top plate; 130, guide post; 210, tooling base; 220, tooling plate; 231, mounting seat; 232, gripper cylinder; 233, clamping block; 310, clamping drive source; 321, clamping seat; 322, clamping cylinder; 323, guide sleeve; 410, servo drive source; 421, housing; 422, end cover; 423, core post; 424, top core; 425, conical chuck; 426, moving piston; 427, first air inlet / outlet; 428, second air inlet / outlet; 50, load cell. Detailed Implementation

[0027] A preferred embodiment of the present invention will now be described in detail with reference to the accompanying drawings.

[0028] To achieve the above objectives, the embodiments of this utility model adopt the following technical solutions: (Refer to...) Figure 1 , Figure 3A shock absorber indicator mechanism includes a frame 10, a changing fixture, a clamping fixture, and a servo loading mechanism. The changing fixture is mounted on the frame 10 and is used to vertically fix the product. The clamping fixture includes a clamping drive source 310 and a pressing component, which is located at the output end of the clamping drive source and is used to vertically clamp the product. The servo loading mechanism includes a servo drive source 410 and a clamping fixture, which is located at the output end of the servo drive source and is used to circumferentially clamp the piston rod of the product. In use, the product is vertically placed on the changing fixture on the frame to fix the outer cylinder of the product, and the clamping drive source drives the pressing component to press the piston rod. The pressing component moves down the frame to the dust cover position of the product's outer cylinder. The pressing component presses the product firmly. The servo drive source drives the clamping fixture to move to the connecting rod clamping position. The clamping fixture automatically clamps the threaded section of the product's piston connecting rod. Then, the servo drive source starts the test according to the preset speed and amplitude distance. After the test is completed, the servo drive source drives the clamping fixture to automatically rise to the connecting rod clamping position. The clamping fixture then automatically releases. At this time, the servo drive source continues to rise until it reaches the standby position and stops. At the same time, the pressing drive source drives the pressing component back to the origin. The changing fixture releases its clamping and fixing of the product. Then, subsequent loading and unloading operations can be carried out. This completes the power indication test of a single shock absorber product.

[0029] Furthermore, the frame 10 includes a base plate 110, a top plate 120, and guide columns 130. The top plate and the base plate are arranged parallel to each other, and there are several guide columns arranged parallel between the base plate and the top plate. In this way, the base plate, the top plate, and the guide columns form the main structure of the frame, and the main structure can be used to install and fix the mechanisms required for the operation of the indicator machine.

[0030] It should be noted that the shock absorber indicator in this embodiment is the same as the existing indicator, capable of comparing the recorded product indicator 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.

[0031] Reference Figure 1 , Figure 2 As a preferred technical solution in this embodiment, the tooling for changing the shape includes a tooling base 210, a tooling plate 220, and a gripper assembly. Specifically, the tooling base 210 can be fixedly mounted on the frame 10, the tooling plate 220 is fixedly mounted on the top of the tooling base, and the gripper assembly is fixedly mounted on the top of the tooling plate. When fixing the product, the gripper assembly opens, places the product vertically on the tooling plate, and positions the product inside the gripper assembly. Then, the gripper assembly closes to clamp and fix the outer cylinder of the product.

[0032] Furthermore, refer to Figure 2The gripper assembly includes a mounting base 231, gripper cylinders 232, and clamping blocks 233. The mounting base 231 is vertically fixed on the top of the tooling plate 220. There are two gripper cylinders 232, which are arranged opposite each other on both sides of the mounting base. The clamping blocks 233 are located at the output end of the gripper cylinders. In use, when it is necessary to clamp and fix the product, the gripper cylinders on both sides can be used to drive the clamping blocks 233 on both sides to move closer. When the clamping blocks on both sides are in contact with the outer cylinder of the product, the product can be fixed.

[0033] Furthermore, to improve the clamping effect of the clamping block 233 on the outer cylinder of the product, a clamping groove adapted to the outer wall of the outer cylinder is provided on the clamping surface of the clamping block 233. This allows the clamping groove to contact the outer cylinder during clamping, thereby enhancing the clamping force. It should be noted that the clamping groove in this embodiment can be arc-shaped to improve the connection with the outer cylinder.

[0034] Reference Figure 1 , Figure 3 In some embodiments, the clamping drive source 310 is a hydraulic cylinder, and the pressing assembly includes a clamping seat 321 and a clamping cylinder 322. The clamping seat 321 is vertically slidably mounted on the frame 10, and the clamping cylinder 322 is fixedly mounted on the inner side of the clamping seat. The clamping seat is a plate-shaped structure that is horizontally slidably mounted on the frame. In use, the clamping drive source drives the clamping seat to move vertically along the frame, thereby driving the clamping cylinder on it to move. When it is necessary to clamp the dust cover of the shock absorber outer cylinder, it can be achieved by driving the clamping cylinder to fit into the dust cover.

[0035] Furthermore, in order to improve the stability of the clamping seat 321 moving vertically along the frame, a number of guide sleeves 323 are fixedly provided on the periphery of the clamping seat 321. The guide sleeve is a sleeve structure and is slidably disposed on the outside of the guide post 130. In use, under the action of the clamping drive source, the clamping seat can move along the guide post through the guide sleeve to realize the vertical movement of the clamping seat along the frame.

[0036] It should be noted that the pressing component in the clamping fixture can clamp and fix the outer cylinder of the product from the axial direction, while the changing fixture can clamp and fix the outer cylinder of the product from the radial direction. The combination of the two can fix the product from multiple dimensions to improve the stability of the product fixation.

[0037] Reference Figure 4 , Figure 5In some embodiments, the servo drive source 410 is a servo electric cylinder. The clamping fixture includes a housing 421, an end cap 422, a core 423, a top core 424, a conical chuck 425, and a moving piston 426. Specifically, the housing 421 is typically made of metal or plastic to protect the internal structure from damage and contamination. The end cap 422 is fixedly mounted on the top of the housing 421. The core 423 extends axially from the end cap 422 toward the inner side of the housing 421. The top core 424 is slidably and sealingly connected to the inner cavity of the core 423. The conical chuck 425 is sleeved on the outer side of the bottom end of the top core. This conical chuck is a movable clamp for holding workpieces and is typically made of an elastic material, such as steel or copper. The conical chuck can clamp or release the workpiece by compression or expansion. The moving piston 426 is slidably disposed within the inner cavity of the housing 421. The moving piston 426 is used to drive the conical chuck to close and clamp the piston rod threaded section at the top of the product. Furthermore, the moving piston is one of the control elements of the clamping fixture, and is usually made of metal or plastic. When air is supplied to it through the air passage, the moving piston will apply pressure to the conical chuck to clamp the piston rod threaded section of the product. It should be noted that, in order to facilitate the driving of the moving piston, the housing is also connected to an air passage, which includes pipes and connectors for supplying air to the clamping fixture. The connectors may include a first air inlet / outlet 427 and a second air inlet / outlet 428. The first air inlet / outlet 427 and the second air inlet / outlet 428 can be used to allow air to enter and exit the housing, respectively. The pipes and connectors are usually made of metal or plastic, and the air passage is connected to the control unit or air source device of the clamping fixture.

[0038] Meanwhile, in order to accurately measure the damping force experienced by the shock absorber during the testing process, a weighing sensor 50 is also provided at the output end of the servo cylinder. In use, the top of the top core is connected to the end of the weighing sensor 50 away from the servo cylinder. When it is necessary to clamp the threaded section of the piston rod of the product, the clamping fixture can be driven to move towards the piston rod by the servo cylinder. At this time, the piston rod enters the inner side of the conical chuck and pushes the top core to move axially along the inner cavity of the core column. After the top core moves into place, the air passage supplies air into the housing to push the moving piston to move towards the conical chuck. Since the conical chuck has a certain elasticity, as the moving piston contacts the outer side of the conical chuck, it will drive the conical chuck to contract to clamp the threaded section of the piston rod. Thus, the piston rod can be stably clamped and fixed.

[0039] Furthermore, in order to improve the driving effect of the moving piston 426 on the conical chuck 425, an inner conical surface that mates with the outer wall of the conical chuck 425 is provided at the bottom end of the moving piston 426. At the same time, since the outer surface of the conical chuck is also conical, when the moving piston moves to contact the conical chuck, the conical surfaces of the two can be used to clamp the conical chuck.

[0040] In use, the product is vertically placed on the tooling plate 220 of the changing fixture on the frame. The clamping cylinder 232 drives the clamping blocks 233 on both sides to clamp and fix the outer cylinder of the product. The clamping drive source 310 drives the clamping seat 321 to move down along the frame 10 to the dust cover position of the outer cylinder of the product. The product is clamped by the clamping cylinder 322. The servo drive source 410 drives the clamping fixture to move to the connecting rod clamping position. The clamping fixture automatically clamps the threaded section of the piston connecting rod of the product. Then the servo drive source 410... 0. The test begins at the preset speed and amplitude distance. After the test is completed, the servo drive source drives the clamping fixture to automatically rise to the linkage clamping position. The clamping fixture automatically releases. At this time, the servo drive source 410 continues to rise until it reaches the standby position and then stops. At the same time, the pressure drive source 310 drives the pressure seat 321 and the pressure cylinder 322 on it back to the origin. The gripper assembly releases its gripping and fixing of the product. Subsequent loading and unloading operations can then be carried out. This completes the power indication test of a single shock absorber product.

[0041] 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 shock absorber dynamometer, comprising a frame (10), characterized in that, Also includes: A changeover fixture is mounted on the frame (10) and is used to vertically fix the product. A clamping fixture, comprising a clamping drive source (310) and a pressing assembly disposed at the output end of the clamping drive source for vertically clamping the product; and The servo loading mechanism includes a servo drive source (410) and a clamping fixture disposed at the output end of the servo drive source for circumferentially clamping the piston rod of the product.

2. The shock absorber indicator mechanism according to claim 1, characterized in that, The changeover fixture includes a fixture base (210) mounted on the frame (10), a fixture plate (220) fixed to the top of the fixture base, and a gripper assembly fixed to the top of the fixture plate.

3. The shock absorber indicator mechanism according to claim 2, characterized in that, The gripper assembly includes a mounting base (231) fixed on the top of the tooling plate (220), gripper cylinders (232) arranged opposite to each other on both sides of the mounting base, and a clamping block (233) disposed at the output end of the gripper cylinders.

4. The shock absorber indicator mechanism according to claim 3, characterized in that, The clamping surface of the clamping block (233) is provided with a clamping groove that is adapted to the outer wall of the outer cylinder of the product.

5. The shock absorber indicator mechanism according to claim 3, characterized in that, The pressing drive source (310) is a hydraulic cylinder, and the pressing assembly includes a pressing seat (321) that is vertically slidably mounted on the frame (10) and a pressing cylinder (322) that is fixedly mounted inside the pressing seat.

6. The shock absorber indicator mechanism according to claim 5, characterized in that, The frame (10) includes a frame base plate (110), a frame top plate (120) disposed opposite to the frame base plate, and a number of guide columns (130) disposed parallel between the frame base plate and the frame top plate.

7. The shock absorber indicator mechanism according to claim 6, characterized in that, The clamping seat (321) is fixedly provided with a plurality of guide sleeves (323) on its periphery, and the guide sleeves are slidably disposed on the outside of the guide post (130).

8. The shock absorber indicator mechanism according to claim 5, characterized in that, The servo drive source (410) is a servo electric cylinder. The clamping fixture includes a housing (421), an end cap (422) fixed on the top of the housing, a core column (423) extending axially from the end cap to the inner side of the housing, a top core (424) slidably sealed to the inner cavity of the core column, a conical chuck (425) sleeved on the outer side of the bottom end of the top core, and a motion piston (426) slidably disposed in the inner cavity of the housing (421) for driving the conical chuck to close.

9. The shock absorber indicator mechanism according to claim 8, characterized in that, The bottom end of the moving piston (426) is provided with an inner conical surface that mates with the outer wall of the conical chuck (425).

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