A testing fixture

Abstract

This utility model relates to the field of testing fixture technology, and discloses a testing fixture, including a support and a test platform fixedly connected to the upper side of the support. An adjustment and positioning mechanism and an auxiliary alignment mechanism are provided on the upper side of the support. The auxiliary alignment mechanism is located on one side of the adjustment and positioning mechanism. The adjustment and positioning mechanism includes a piston cylinder, which is fixedly connected to the upper surface of the test platform. A piston disc is slidably connected inside the piston cylinder, and a piston rod is fixedly connected to the upper surface of the piston disc. A scale is provided on one side of the piston rod, and a pressure plate is fixedly connected to the upper surface of the piston rod. A slide cylinder is fixedly connected to the lower surface of the pressure plate, and a compression frame is fixedly connected to one side of the piston cylinder. The auxiliary alignment mechanism provides alignment, centering, and limiting during spring inspection, thereby improving testing accuracy and adaptability. The adjustment and positioning mechanism is used to measure the pressure of the spring, making the device easy to use.

Description

Technical Field

[0001] This utility model relates to the field of testing tooling and fixture technology, specifically a testing tooling and fixture. Background Technology

[0002] The core of inspecting tooling fixtures lies in verifying their ability to accurately, stably, and safely perform their intended functions, ensuring the consistency of the inspected product's quality. This includes, but is not limited to: functional verification (simulating actual clamping actions to check the smoothness and reliability of positioning, clamping, support, and guiding functions; material and hardness checks (confirming that the materials of key stress-bearing and wear-resistant parts meet specifications and that the heat treatment hardness is qualified); clamping force testing (verifying that the force provided by the clamping mechanism is sufficient and uniform to avoid product deformation or damage); safety and durability assessment (checking ease of operation, effectiveness of protective devices, structural rigidity and weak points, and conducting necessary fatigue tests); and regular maintenance and calibration (ensuring accuracy and functional stability after long-term use). These tests are crucial for ensuring the performance of tooling fixtures, the quality of the final product, and production safety.

[0003] The application document with publication number "CN 222364860 U" states: "However, during the spring compression test, the lack of limiting and guiding effect makes the spring very prone to bending, and the bending generally occurs in the middle part of the spring, which affects the accuracy of spring performance testing." This device adds a cylindrical guide rod inside the spring, so that the spring can be guided by the guide rod during compression, thereby reducing the degree of bending of the spring and improving the testing accuracy. However, since the springs are of different sizes, the guide rod in this device cannot change its size by itself, which limits the adaptability of the device. Utility Model Content

[0004] The purpose of this invention is to provide a testing fixture to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a testing fixture, comprising a support and a test platform fixedly connected to the upper side of the support, wherein an adjustment and positioning mechanism and an auxiliary alignment mechanism are provided on the upper side of the support, and the auxiliary alignment mechanism is provided on one side of the adjustment and positioning mechanism;

[0006] The adjustment and positioning mechanism includes a piston cylinder, which is fixedly connected to the upper surface of the test platform. A piston disc is slidably connected inside the piston cylinder, and a piston rod is fixedly connected to the upper surface of the piston disc. A scale is provided on one side of the piston rod, and a pressure platform is fixedly connected to the upper surface of the piston rod. A slide cylinder is fixedly connected to the lower surface of the pressure platform, and an extrusion frame is fixedly connected to one side of the piston cylinder. The extrusion frame is concentrically arranged with the pressure platform, and a guide rod is fixedly connected to the upper surface of the extrusion frame. The guide rod is located at the center of the pressure platform, and a pressure head is connected to one side of the piston cylinder.

[0007] Preferably, the outer diameter of the guide rod is the same as the inner diameter of the slide tube.

[0008] Preferably, the extrusion frame has multiple evenly distributed fan-shaped grooves inside.

[0009] Preferably, the piston cylinder is provided with a limiting groove to prevent the piston rod from deflecting.

[0010] Preferably, the auxiliary alignment mechanism includes a clamping plate, which is fixedly connected to the lower surface of the slide cylinder. A worm gear is rotatably connected inside the clamping plate. A support sleeve is fixedly connected to one side of the clamping plate. A worm is rotatably connected inside the support sleeve. The worm is tangentially arranged to the outer surface of the worm gear and meshes with the worm wheel. A guide groove is formed on the lower surface of the worm wheel. Multiple clamping blocks are slidably connected inside the clamping plate. Each clamping block has a meshing groove on its upper surface. Each clamping block meshes with the guide groove through the meshing groove. A support plate is fixedly connected to the adjacent side of each clamping block.

[0011] Preferably, the lower surface of the clamp is set to correspond to the starting point of the scale.

[0012] Preferably, the tray is configured with an arc-shaped structure.

[0013] Compared with the prior art, the present invention provides a testing fixture with the following advantages:

[0014] 1. The auxiliary alignment mechanism is used to provide alignment, centering, and limiting during spring inspection. This mechanism initially limits the spring through the guide rod, and works with multiple synchronously approaching trays to clamp the outer wall of the spring. This allows the device to inspect springs of different sizes. Moreover, the multiple trays provide uniform clamping force to the spring, which can straighten the spring and compress the space of the spring to an extreme extent, so that it cannot bend. This improves the accuracy and adaptability of the inspection.

[0015] 2. The adjusting positioning mechanism is used to measure the pressure of the spring. This mechanism provides a limiting effect on the spring through the compression frame, so that the auxiliary alignment mechanism can compress different springs while ensuring the guidance of the spring. At the same time, the scale of this mechanism allows the user to intuitively calculate the spring's elastic coefficient, making the device easy to use. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the structure of this utility model;

[0018] Figure 2 This is a structural schematic diagram from another perspective of the present invention;

[0019] Figure 3 This is a schematic diagram of a half-section of the present invention;

[0020] Figure 4 This is an exploded view of the adjusting positioning mechanism in this utility model;

[0021] Figure 5 This is an exploded structural diagram of the auxiliary alignment mechanism in this utility model.

[0022] In the diagram: 1. Support; 2. Test bench; 3. Adjustment and positioning mechanism; 301. Piston cylinder; 302. Piston disc; 303. Piston rod; 304. Scale; 305. Pressure table; 306. Slide cylinder; 307. Extrusion frame; 308. Guide rod; 309. Pressure head; 4. Auxiliary alignment mechanism; 401. Clamping plate; 402. Worm gear disc; 403. Support sleeve; 404. Worm; 405. Guide groove; 406. Clamping block; 407. Engaging groove; 408. Support plate. Detailed Implementation

[0023] 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.

[0024] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0025] Example 1:

[0026] Please see Figure 1-5 This utility model provides a technical solution: a testing fixture, including a support 1 and a test platform 2 fixedly connected to the upper side of the support 1. An adjustment and positioning mechanism 3 and an auxiliary alignment mechanism 4 are provided on the upper side of the support 1. The auxiliary alignment mechanism 4 is located on one side of the adjustment and positioning mechanism 3.

[0027] This mechanism is used to limit the spring, which improves the accuracy of spring measurement. The adjustment and positioning mechanism 3 includes a piston cylinder 301, which is fixedly connected to the upper surface of the test platform 2. A piston disc 302 is slidably connected inside the piston cylinder 301. A piston rod 303 is fixedly connected to the upper surface of the piston disc 302. A scale 304 is provided on one side of the piston rod 303. A pressure platform 305 is fixedly connected to the upper surface of the piston rod 303. A slide cylinder 306 is fixedly connected to the lower surface of the pressure platform 305. A compression frame 307 is fixedly connected to one side of the piston cylinder 301. The compression frame 307 is concentrically arranged with the pressure platform 305. A guide rod 308 is fixedly connected to the upper surface of the compression frame 307. The guide rod 308 is located at the center of the pressure platform 305. A pressure head 309 is connected to one side of the piston cylinder 301.

[0028] Furthermore, the outer diameter of the guide rod 308 is the same as the inner diameter of the slide 306.

[0029] Furthermore, the extrusion frame 307 has multiple evenly distributed fan-shaped grooves inside.

[0030] Furthermore, the piston cylinder 301 is provided with a limiting groove to prevent the piston rod 303 from deflecting.

[0031] Example 2:

[0032] This mechanism is used to assist in clamping and positioning the spring, improving measurement accuracy. Please refer to [link / reference]. Figure 1-5Furthermore, in conjunction with Embodiment 1, the auxiliary alignment mechanism 4 includes a clamping plate 401, which is fixedly connected to the lower surface of the slide cylinder 306. A worm gear disk 402 is rotatably connected inside the clamping plate 401. A support sleeve 403 is fixedly connected to one side of the clamping plate 401. A worm 404 is rotatably connected inside the support sleeve 403. The worm 404 is tangentially arranged to the outer surface of the worm gear disk and meshes with the worm gear disk 402. A guide groove 405 is provided on the lower surface of the worm gear disk 402. Multiple clamping blocks 406 are slidably connected inside the clamping plate 401. Each clamping block 406 has a meshing groove 407 on its upper surface. Each clamping block 406 is meshed with the guide groove 405 through the meshing groove 407. A support plate 408 is fixedly connected to the adjacent side of each clamping block 406.

[0033] Furthermore, the lower surface of the clamp 401 is set to correspond to the starting point of the scale 304.

[0034] Furthermore, the lower surface of the clamp 401 is set to correspond to the starting point of the scale 304.

[0035] In actual operation, when this device is in use, the user connects the pressure head 309 and supplies hydraulic pressure into the piston cylinder 301. The hydraulic pressure pushes the piston disc 302 upward, causing the device to return to its initial height. At the same time, the distance between the support plates 408 is at its maximum. The user inserts the spring to be tested onto the outside of the guide rod 308. Then, the user supplies negative pressure into the piston cylinder 301. The negative pressure causes the piston disc 302 to begin to descend. The piston disc 302 drives the clamping plate 401 to approach the upper end face of the spring. After the piston disc 302 contacts the upper end of the spring, the user stops supplying pressure to the piston cylinder 301. Then, the user rotates the worm gear 404, using the rotation of the worm gear 404... The worm gear 402 is driven to rotate. After the worm gear 402 rotates, the cooperation between the guide groove 405 and the meshing groove 407 causes multiple clamping blocks 406 to approach each other. The clamping blocks 406 drive the support plate 408 to approach synchronously, thereby clamping the outer wall of the spring. At the same time, because the support plate 408 moves at the same time, the spring is clamped at the center of the pressure table 305, avoiding the spring from being misaligned. At the same time, the multiple support plates 408 compress the bending space of the spring, so that the spring cannot bend and deform. Thus, the clamping plate 401 can directly compress the spring in a direction perpendicular to the upper plane of the extrusion frame 307, thereby ensuring the detection accuracy of the spring.

[0036] 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 testing fixture, comprising a support (1) and a test platform (2) fixedly connected to the upper side of the support (1), characterized in that: The support (1) is provided with an adjustment and positioning mechanism (3) and an auxiliary alignment mechanism (4) on its upper side. The auxiliary alignment mechanism (4) is located on one side of the adjustment and positioning mechanism (3). The adjustment and positioning mechanism (3) includes a piston cylinder (301), which is fixedly connected to the upper surface of the test platform (2). A piston disc (302) is sealed and slidably connected inside the piston cylinder (301). A piston rod (303) is fixedly connected to the upper surface of the piston disc (302). A scale (304) is provided on one side of the piston rod (303). A pressure platform (305) is fixedly connected to the upper surface of the piston rod (303). A slide cylinder (306) is fixedly connected to the lower surface of the pressure platform (305). An extrusion frame (307) is fixedly connected to one side of the piston cylinder (301). The extrusion frame (307) is concentrically arranged with the pressure platform (305). A guide rod (308) is fixedly connected to the upper surface of the extrusion frame (307). The guide rod (308) is located at the center of the pressure platform (305). A pressure head (309) is connected to one side of the piston cylinder (301).

2. The inspection fixture according to claim 1, characterized in that: The outer diameter of the guide rod (308) is the same as the inner diameter of the slide (306).

3. The inspection fixture according to claim 1, characterized in that: The extrusion frame (307) has multiple evenly distributed fan-shaped grooves inside.

4. The inspection fixture according to claim 1, characterized in that: The piston cylinder (301) is provided with a limiting groove inside to prevent the piston rod (303) from deflecting.

5. The inspection fixture according to claim 1, characterized in that: The auxiliary alignment mechanism (4) includes a clamp (401), which is fixedly connected to the lower surface of the slide cylinder (306). A worm gear disk (402) is rotatably connected inside the clamp (401). A support sleeve (403) is fixedly connected to one side of the clamp (401). A worm (404) is rotatably connected inside the support sleeve (403). The worm (404) is tangentially arranged to the outer surface of the worm gear disk. The worm gear disk (402) is engaged with the guide groove (405) on its lower surface. Multiple clamping blocks (406) are slidably connected inside the clamping disk (401). The upper surface of each clamping block (406) is provided with a meshing groove (407). Each clamping block (406) is engaged with the guide groove (405) through the meshing groove (407). A support plate (408) is fixedly connected to one side of each clamping block (406).

6. The inspection fixture according to claim 5, characterized in that: The lower surface of the clamp (401) is set to correspond to the starting point of the scale (304).

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