Height-adjustable clamp for durometer

Abstract

The utility model belongs to the technical field of durometer auxiliary equipment, and particularly relates to a height-adjustable clamp for a durometer, which comprises a base, a lifting component is arranged above the base, a worktable is arranged above the lifting component, and a clamping component is arranged in the middle of the worktable; the height-adjustable clamp for the durometer comprises a clamping mechanism and a height adjusting mechanism. According to the height-adjustable clamp for the durometer, the clamping mechanism is matched with workpieces of various shapes through a cross-shaped sliding groove and a movable clamping jaw, the clamping force is accurately adjusted through an air cylinder and a hydraulic oil system, the height-adjustable clamp is suitable for workpieces of different thicknesses, a clamping jaw inner side buffering fine adjustment structure and related assemblies are matched, and universality, stability and reliability are improved; the height adjusting mechanism utilizes a motor to drive a screw rod, rapid and accurate height adjustment is achieved, the high-precision detection requirement is met, a stable supporting structure of the height adjusting mechanism is stable during adjustment, stable supporting is achieved after adjustment, and it is ensured that detection is conducted stably and reliably.

Description

Technical Field

[0001] This utility model relates to the technical field of auxiliary equipment for hardness testers, specifically a height-adjustable clamp for hardness testers. Background Technology

[0002] In the field of hardness tester testing, existing fixture technology has many limitations. In terms of clamping, most fixtures have fixed structures, and the jaws cannot flexibly adjust their position and clamping force, making it difficult to adapt to workpieces with different shapes and thicknesses. For example, when encountering workpieces with irregular shapes or large thickness differences, traditional fixtures cannot guarantee stable clamping, causing the workpiece to shake during the testing process, which seriously affects the testing accuracy. Moreover, they lack a mechanism to adapt to the workpiece surface, making it difficult to ensure that the jaws and the workpiece make full and uniform contact, resulting in poor reliability of the test results.

[0003] Regarding height adjustment, existing fixtures suffer from low efficiency and poor accuracy. Manual adjustment is cumbersome and time-consuming, making them unsuitable for scenarios involving frequent testing of workpieces at different heights. Some adjustment structures have limited accuracy, failing to meet the requirements of modern high-precision testing. Furthermore, some fixtures lack stability after adjustment, and the pressure generated by the hardness tester during operation can easily cause the fixture to wobble and shift, failing to provide a stable working platform for testing. Therefore, there is an urgent need to improve the height-adjustable fixture for hardness testers to solve the above problems. Utility Model Content

[0004] The purpose of this invention is to provide a height-adjustable clamp for a hardness tester to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a height-adjustable fixture for a hardness tester, comprising a base, a lifting assembly above the base, a worktable above the lifting assembly, and a clamping assembly at the center of the worktable; the height-adjustable fixture for the hardness tester includes a clamping mechanism and a height adjustment mechanism, the clamping mechanism including a worktable, a cylinder fixedly installed at the center of the bottom of the worktable, and a fixture base fixedly installed at the center of the base, the fixture base having a cross-shaped sliding groove.

[0006] Preferably, a slider is movably installed in the slide groove, a gripper is fixedly installed on the slider, an oil storage chamber is provided in the fixture base, a piston disc is movably installed in the oil storage chamber, hydraulic oil is stored between the piston disc and the oil storage chamber, and the cylinder push rod passes through the worktable and the fixture base and is fixedly installed at the bottom of the piston disc.

[0007] Preferably, a return oil pipe is fixedly installed on the upper end of the gripper, and a valve is fixedly installed on the return oil pipe. The end of the return oil pipe is connected to the oil storage chamber. A cylindrical cavity is provided above the oil storage chamber. A limiting edge one is provided in the cavity. A sleeve one is movably installed on the right side of the limiting edge one. A sleeve two is movably installed in the sleeve one. A limiting edge two is provided at the edge of the sleeve two. A limiting edge three is provided at the edge of the cavity, so that the sleeve two can move and extend within the cavity under the action of internal hydraulic oil.

[0008] Preferably, the second sleeve is fixedly installed at the bottom of the gripper, the bottom of the gripper is provided with an oil guide pipe first, and an oil guide pipe second is provided above the first oil guide pipe. A baffle is movably installed at the connection between the first oil guide pipe and the second oil guide pipe. The diameter of the baffle is smaller than the diameter of the second oil guide pipe but larger than the diameter of the connection between the first oil guide pipe and the second oil guide pipe.

[0009] Preferably, an installation bracket is fixedly installed inside the second oil guide pipe, a limit rod is movably installed at the middle position of the installation bracket, the bottom of the limit rod is fixedly installed on the baffle, and a spring is fixedly installed between the installation bracket and the baffle.

[0010] Preferably, the inner side of the gripper is provided with an oil guide pipe three, the oil guide pipe two is connected to the oil guide pipe three, a piston disc two is movably installed in the oil guide pipe three, a movable rod is fixedly installed in the middle of the piston disc two, the upper end of the movable rod passes through the gripper, a stop block is fixedly installed at its top, a spring two is fixedly installed between the stop block and the gripper, a pressure plate is fixedly installed at the bottom, a slider two is fixedly installed on the side of the pressure plate, a sliding groove two is provided below the oil guide pipe three, and the slider two is movably installed in the sliding groove two.

[0011] Preferably, the height adjustment mechanism includes a base, two sets of mounting bases are fixedly installed on the left side of the base, and two sets of hinge plates are movably installed in the mounting bases via a rotating shaft. The right side of the base is fixedly installed on a slide rail, and a slider three is movably installed on the slide rail. Another set of hinge plates is movably installed on the slider three via a rotating shaft. The two sets of hinge plates are connected at the middle position by a hinge rod. A motor is fixedly installed on the base, and the output shaft of the motor is fixedly installed on a screw. A connecting block is movably installed on the screw via a thread. The connecting block is fixedly installed in the middle of the rotating shaft, and the front end of the screw is movably installed in a support member via a bearing.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] 1. This hardness tester uses a height-adjustable clamp. The design of the clamping mechanism enhances its versatility and stability. The cross-shaped slide groove, combined with movable jaws, can adapt to workpieces of various shapes. The cylinder and hydraulic oil system precisely adjusts the clamping force to accommodate workpieces of different thicknesses. The hydraulic oil transmits stable pressure, and the inner buffer micro-adjustment structure of the jaws ensures that the workpiece is stable and does not shake during testing. At the same time, the sleeve and oil guide pipeline components can adapt to the workpiece surface conditions and automatically optimize the clamping action, making the clamping more reliable and providing a stable foundation for hardness testing.

[0014] 2. This hardness tester uses a height-adjustable fixture. Through the design of the height adjustment mechanism, the motor-driven screw rotation can quickly adjust the fixture to the appropriate height, improving work efficiency. The threaded engagement between the screw and the connecting block enables precise adjustment, meeting the requirements of high-precision testing. The stable support structure constructed by the mounting bases, hinge plates, and slide rails on both sides ensures the stability of the worktable during adjustment and provides stable support after adjustment. It can withstand the testing pressure without shaking or displacement, ensuring stable and reliable testing. Attached Figure Description

[0015] Figure 1 This is a three-dimensional schematic diagram of the present invention;

[0016] Figure 2 This is a schematic diagram of the clamping mechanism of this utility model;

[0017] Figure 3 This is a half-sectional schematic diagram of the clamping mechanism of this utility model;

[0018] Figure 4 This is a partially enlarged schematic diagram of the present invention;

[0019] Figure 5 This is a half-sectional schematic diagram of the gripper portion of this utility model;

[0020] Figure 6 This is a schematic diagram of the height adjustment mechanism of this utility model.

[0021] In the diagram: 1. Base; 2. Lifting assembly; 3. Worktable; 4. Clamping assembly; 201. Cylinder; 202. Clamping base; 203. Gripper; 204. Slide groove one; 205. Slider one; 206. Oil reservoir; 207. Piston disc one; 208. Push rod; 209. Return oil pipe; 210. Valve; 211. Limiting edge one; 212. Sleeve one; 213. Sleeve two; 214. Limiting edge two; 215. Limiting edge three; 216. Guide oil line one; 217. Baffle plate; 2 18 Oil guide pipe II, 219 Mounting bracket, 220 Limiting rod, 221 Spring I, 222 Oil guide pipe III, 223 Piston disc II, 224 Movable rod, 225 Spring II, 226 Pressure plate, 227 Slider II, 228 Slide groove II, 301 Mounting base, 302 Hinge plate, 303 Rotating shaft, 304 Motor, 305 Screw, 306 Connecting block, 307 Slider III, 308 Slide rail, 309 Support component, 310 Hinge rod. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] Example 1:

[0024] Based on existing technologies, current fixture technologies have many limitations. In terms of clamping, most fixtures have fixed structures, and the grippers cannot flexibly adjust their position and clamping force, making them difficult to adapt to workpieces of varying shapes and thicknesses. For example, when encountering irregularly shaped workpieces or workpieces with significant thickness differences, traditional fixtures cannot guarantee stable clamping, causing workpiece wobbling during inspection and severely affecting inspection accuracy. Furthermore, they lack a mechanism to adapt to the workpiece surface, making it difficult to ensure sufficient and uniform contact between the grippers and the workpiece, resulting in poor reliability of the inspection results. Therefore, this device is designed with a more versatile clamping mechanism. Please refer to [link / reference]. Figures 1-6 This utility model provides a technical solution: a height-adjustable fixture for a hardness tester, including a base 1, characterized in that: a lifting component 2 is provided above the base 1, a worktable 3 is provided above the lifting component 2, and a clamping component 4 is provided in the middle of the worktable 3; the height-adjustable fixture for the hardness tester includes a clamping mechanism and a height adjustment mechanism, the clamping mechanism includes the worktable 3, a cylinder 201 is fixedly installed in the middle of the bottom of the worktable 3, a fixture base 202 is fixedly installed in the middle of the base 1, and a sliding groove 204 is provided in the fixture base 202, the sliding groove 204 being cross-shaped.

[0025] A slider 205 is movably installed in the slide 204. A gripper 203 is fixedly installed on the slider 205. An oil storage chamber 206 is provided in the fixture base 202. A piston disc 207 is movably installed in the oil storage chamber 206. Hydraulic oil is stored between the piston disc 207 and the oil storage chamber 206. The push rod 208 of the cylinder 201 passes through the worktable 3 and the fixture base 202 and is fixedly installed at the bottom of the piston disc 207.

[0026] A return oil pipe 209 is fixedly installed on the upper end of the gripper 203. A valve 210 is fixedly installed on the return oil pipe 209. The end of the return oil pipe 209 is connected to the oil storage chamber 206. A cylindrical cavity is provided above the oil storage chamber 206. A limiting edge 211 is provided in the cavity. A sleeve 212 is movably installed on the right side of the limiting edge 211. A sleeve 213 is movably installed in the sleeve 212. A limiting edge 214 is provided at the edge of the sleeve 213. A limiting edge 215 is provided at the edge of the cavity, so that the sleeve 213 can move and extend in the cavity under the action of the internal hydraulic oil.

[0027] The second sleeve 213 is fixedly installed at the bottom of the clamp 203. The bottom of the clamp 203 is provided with an oil guide pipe 216. Above the first oil guide pipe 216 is a second oil guide pipe 218. A baffle 217 is movably installed at the connection between the first oil guide pipe 216 and the second oil guide pipe 218. The diameter of the baffle 217 is smaller than the diameter of the second oil guide pipe 218 but larger than the diameter of the connection between the first oil guide pipe 216 and the second oil guide pipe 218.

[0028] An installation bracket 219 is fixedly installed inside the second oil guide line 218. A limit rod 220 is movably installed in the middle position of the installation bracket 219. The bottom of the limit rod 220 is fixedly installed on the baffle 217. A spring 221 is fixedly installed between the installation bracket 219 and the baffle 217.

[0029] The inner side of the gripper 203 is provided with an oil guide pipe 222. The oil guide pipe 218 is connected to the oil guide pipe 222. The piston disc 223 is movably installed in the oil guide pipe 222. The movable rod 224 is fixedly installed in the middle of the piston disc 223. The upper end of the movable rod 224 passes through the gripper 203. A stop block is fixedly installed on its top. A spring 225 is fixedly installed between the stop block and the gripper 203. A pressure plate 226 is fixedly installed at the bottom. A slider 227 is fixedly installed on the side of the pressure plate 226. A groove 228 is provided below the oil guide pipe 222. The slider 227 is movably installed in the groove 228.

[0030] When a workpiece needs to be clamped, cylinder 201 is activated, and cylinder push rod 208 moves upward, pushing piston disc 207 upward within oil reservoir 206. Since hydraulic oil is stored between piston disc 207 and the oil reservoir, the hydraulic oil is compressed, and the pressure is transmitted to each gripper 203. Under the pressure of the hydraulic oil, the grippers open outward or retract inward along the groove to accommodate workpieces of different shapes and sizes. The oil guide pipes 216 and 218 at the bottom of the grippers 203, along with related components, work together to fine-tune the clamping force. When hydraulic oil enters oil guide pipe 216, it pushes baffle 217 upward, compressing spring 22. 1. The movement direction of the baffle is limited by the limit rod 220, ensuring that the hydraulic oil enters the second oil guide pipe 218 in an appropriate amount and flows to the oil guide pipe 222 through the pipe. The piston plate 223 in the third oil guide pipe 222 moves under the action of the hydraulic oil, thereby driving the movable rod 224 to move up and down, so that the pressure plate 226 at the bottom of the movable rod 224 abuts against the surface of the workpiece, further clamping the workpiece. After the inspection is completed, the valve 210 on the return oil pipe 209 is opened. Under the action of the gripper, the weight of the workpiece, and the elastic force of spring 1 and spring 2, the hydraulic oil flows back to the oil storage chamber 206 through the return oil pipe. The gripper returns to the initial position, ready for the next clamping operation.

[0031] Example 2:

[0032] Based on Example 1, existing fixture adjustment methods are inefficient and lack precision in height adjustment. Manual adjustment is cumbersome and time-consuming, making it unsuitable for scenarios involving frequent inspection of workpieces at different heights. Some adjustment structures have limited precision, failing to meet the requirements of modern high-precision testing. Furthermore, some height adjustment mechanisms lack stability after adjustment; the pressure generated by the hardness tester during operation can easily cause the fixture to wobble and shift, failing to provide a stable working platform for testing. Therefore, this device is equipped with a more stable height adjustment mechanism. Please refer to [link / reference]. Figure 5 This utility model provides a technical solution: a height-adjustable fixture for a hardness tester. The height adjustment mechanism includes a base 1. Two sets of mounting bases 301 are fixedly installed on the left side of the base 1. Two sets of hinge plates 302 are movably installed in the mounting bases 301 via a rotating shaft 303. A slide rail 308 is fixedly installed on the right side of the base 1. A slider 307 is movably installed on the slide rail 308. Another set of hinge plates 302 is movably installed on the slider 307 via a rotating shaft. The middle position of the two sets of hinge plates 302 is connected by a hinge rod 310. A motor 304 is fixedly installed on the base 1. The output shaft of the motor 304 is fixedly installed on a screw 305. A connecting block 306 is movably installed on the screw 305 via a thread. The connecting block 306 is fixedly installed in the middle of the rotating shaft 303. The front end of the screw 305 is movably installed in a support member 309 via a bearing.

[0033] According to the workpiece height requirements, the motor 304 is started, and the motor output shaft drives the screw 305 to rotate. The connecting block 306 on the screw will move along the screw axis due to its threaded engagement with the screw. The connecting block is fixedly installed in the middle of the rotating shaft 303. The rotating shaft is installed on the hinge plate 302 in the mounting base 301. When the connecting block moves, it drives the hinge plate to rotate around the rotating shaft. The slider 307 on the right slide rail 308 of the base and the hinge plate connected to it will slide on the slide rail as the left hinge plate rotates. The two sets of hinge plates are connected by the hinge rod 310 to ensure the stability of the overall movement. During the rotation of the hinge plate and the sliding of the slider, the worktable 3 achieves smooth lifting and lowering, and quickly adjusts the fixture to the appropriate height.

[0034] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

Claims

1. A height-adjustable clamp for a hardness tester, comprising a base (1), characterized in that: A lifting assembly (2) is provided above the base (1), a worktable (3) is provided above the lifting assembly (2), and a clamping assembly (4) is provided in the middle of the worktable (3). The height-adjustable fixture for the hardness tester includes a clamping mechanism and a height adjustment mechanism. The clamping mechanism includes a worktable (3), a cylinder (201) is fixedly installed at the bottom center of the worktable (3), and a fixture base (202) is fixedly installed at the center of the base (1). The fixture base (202) has a cross-shaped sliding groove (204) inside.

2. The height-adjustable fixture for a hardness tester according to claim 1, characterized in that: A slider (205) is movably installed in the slide groove (204), and a gripper (203) is fixedly installed on the slider (205). An oil storage chamber (206) is provided in the fixture base (202), and a piston disc (207) is movably installed in the oil storage chamber (206). Hydraulic oil is stored between the piston disc (207) and the oil storage chamber (206). The push rod (208) of the cylinder (201) passes through the worktable (3) and the fixture base (202) and is fixedly installed at the bottom of the piston disc (207).

3. The height-adjustable fixture for a hardness tester according to claim 2, characterized in that: The upper end of the gripper (203) is fixedly installed with a return oil pipe (209), and a valve (210) is fixedly installed on the return oil pipe (209). The end of the return oil pipe (209) is connected to the oil storage chamber (206). A cylindrical cavity is provided above the oil storage chamber (206). A limiting edge (211) is provided in the cavity. A sleeve (212) is movably installed on the right side of the limiting edge (211). A sleeve (213) is movably installed in the sleeve (212). A limiting edge (214) is provided at the edge of the sleeve (213). A limiting edge (215) is provided at the edge of the cavity, so that the sleeve (213) can move and extend in the cavity under the action of the internal hydraulic oil.

4. The height-adjustable fixture for a hardness tester according to claim 3, characterized in that: The second sleeve (213) is fixedly installed at the bottom of the clamp (203). The bottom of the clamp (203) is provided with an oil guide pipe (216). An oil guide pipe (218) is provided above the first oil guide pipe (216). A baffle (217) is movably installed at the connection between the first oil guide pipe (216) and the second oil guide pipe (218). The diameter of the baffle (217) is smaller than the diameter of the second oil guide pipe (218) but larger than the diameter of the connection between the first oil guide pipe (216) and the second oil guide pipe (218).

5. The height-adjustable fixture for a hardness tester according to claim 4, characterized in that: An installation bracket (219) is fixedly installed inside the second oil guide pipe (218). A limit rod (220) is movably installed in the middle position of the installation bracket (219). The bottom of the limit rod (220) is fixedly installed on the baffle (217). A spring (221) is fixedly installed between the installation bracket (219) and the baffle (217).

6. The height-adjustable fixture for a hardness tester according to claim 5, characterized in that: The inner side of the gripper (203) is provided with an oil guide pipe three (222), the oil guide pipe two (218) is connected to the oil guide pipe three (222), the piston disc two (223) is movably installed in the oil guide pipe three (222), the piston disc two (223) is fixedly installed in the middle of the piston disc two (223), the upper end of the moving rod (224) passes through the gripper (203), the top of the moving rod (224) is fixedly installed with a stop block, the stop block and the gripper (203) are fixedly installed with a spring two (225), the bottom is fixedly installed with a pressure plate (226), the side of the pressure plate (226) is fixedly installed with a slider two (227), the lower part of the oil guide pipe three (222) is provided with a sliding groove two (228), and the slider two (227) is movably installed in the sliding groove two (228).

7. A height-adjustable fixture for a hardness tester according to claim 6, characterized in that: The height adjustment mechanism includes a base (1), on which two sets of mounting bases (301) are fixedly installed on the left side. Two sets of hinge plates (302) are movably installed in the mounting bases (301) via a rotating shaft (303). On the right side of the base (1), a slide rail (308) is fixedly installed. A slider three (307) is movably installed on the slide rail (308). Another set of hinge plates (302) is movably installed on the slider three (307) via a rotating shaft. The two sets of hinge plates (302) are connected at the middle position by a hinge rod (310). A motor (304) is fixedly installed on the base (1). The output shaft of the motor (304) is fixedly installed on a screw (305). A connecting block (306) is movably installed on the screw (305) via a thread. The connecting block (306) is fixedly installed in the middle of the rotating shaft (303). The front end of the screw (305) is movably installed in a support member (309) via a bearing.

Images