Claw buckling force testing device applied to claw buckling type elastic sheet

Abstract

The utility model discloses a claw buckling force testing device applied to a claw buckling type elastic sheet, which comprises a base and a driving testing assembly arranged on the base, and the driving testing assembly comprises a screw rod lifting pair and a lifting sliding seat driven by the screw rod lifting pair; the lifting sliding seat is provided with a pull and push dynamometer which is vertically arranged; the claw buckling force testing device applied to the claw buckling type elastic piece further comprises a testing jig, the testing jig comprises a jig lower die, a jig upper die and a testing push rod, and a vertically-penetrating lower die through hole is formed in the core portion of the jig lower die. A profiling buckling part is arranged at the lower end of the jig upper die, and a vertically-penetrating upper die through hole is formed in the core of the jig upper die. Through the structural design, the claw buckling force testing device applied to the claw buckling type elastic sheet has the advantage of being novel in structural design, and can be effectively suitable for claw buckling force testing of the claw buckling type elastic sheet.

Description

Technical Field

[0001] This utility model relates to the field of testing device technology, and in particular to a claw force testing device for claw-type spring clips. Background Technology

[0002] For screw-driven motor products, such as the Chinese utility model patent (patent number 201720399162.6, titled "A Metal Screw Drive Stepper Motor"), a claw-type spring is needed to reduce axial movement of the output screw at the end of the motor housing. This claw-type spring provides an axial elastic force to the output screw. The magnitude of the claw-type spring's clamping force directly affects the quality of the screw-driven motor product.

[0003] Among them, the Chinese utility model patent with patent number ZL201821927480.6 and patent name: A tripping force detection device, specifically discloses the following technical solution: A tripping force detection device includes a box, a clamp on the top of the box, a tripping drive detection mechanism above the clamp, the tripping drive detection mechanism includes a housing fixed to the top of the box, a lead screw assembly inside the housing, the lead screw assembly includes a lead screw and a lead screw sleeve sleeved on the outside of the lead screw, a servo motor on the top of the housing, the servo motor is connected to the end of the lead screw, the lead screw sleeve is fixed to a lifting sliding plate, a mounting plate on the bottom of the housing, the back of the mounting plate is fixedly connected to the lifting sliding plate, and multiple hooks are installed on the mounting plate; a guide rail that cooperates with the lifting sliding plate is provided on the back of the lifting sliding plate, the guide rail is fixed on the inner wall of the housing, and a tension sensor is installed between the lifting sliding plate and the guide rail.

[0004] When the above-mentioned tripping force testing equipment is working, the test product is held by a fixture, the product is hooked on the mounting plate, the servo motor rotates to drive the lead screw sleeve and the lifting sliding plate to move upward, the lifting sliding plate drives the mounting plate and the hook to stretch the test product, and during the process of the lifting sliding plate moving upward, the tension sensor tests the tripping force of the product.

[0005] It should be noted that, due to the special characteristics of the claw-type spring sheet structure, the above-mentioned release force testing equipment cannot effectively test the claw force of the claw-type spring sheet; therefore, it is necessary to design and develop a claw force testing device for claw-type spring sheets. Utility Model Content

[0006] The purpose of this invention is to provide a claw force testing device for claw-type spring sheets, which addresses the shortcomings of existing technologies. This claw force testing device for claw-type spring sheets has a novel structural design and can be effectively applied to the claw force testing of claw-type spring sheets.

[0007] To achieve the above objectives, this utility model is implemented through the following technical solution.

[0008] A claw force testing device for claw-type spring clips includes a base and a driving test assembly mounted on the base. The driving test assembly includes a lead screw lifting pair and a lifting slide driven by the lead screw lifting pair.

[0009] The lifting slide is equipped with a vertically arranged push-pull force gauge;

[0010] The claw force testing device applied to claw-type spring clips also includes a test fixture, which includes a lower mold, an upper mold, and a test push rod. The core of the lower mold has a vertical through hole. The lower end of the upper mold has a contoured fastening part, and the core of the upper mold has a vertical through hole.

[0011] When the test fixture is in use, the claw-type spring clip is engaged with the conformal engagement part of the upper mold of the fixture. The upper mold of the fixture is placed on the upper end of the lower mold of the fixture and the through hole of the upper mold is aligned with the through hole of the lower mold. The test push rod is inserted into the through hole of the upper mold of the upper mold of the fixture from top to bottom.

[0012] The upper mold of the fixture has a downwardly protruding upper mold protrusion at its lower end, the contour fastening part is located at the lower end of the upper mold protrusion, and the lower end opening of the upper mold through hole extends to the lower surface of the upper mold protrusion.

[0013] When the test fixture is in use, the upper mold protrusion of the upper mold of the fixture is inserted into the lower mold through hole of the lower mold of the fixture.

[0014] The upper mold protrusion and the upper mold of the fixture are an integral structure.

[0015] The upper mold protrusion is screwed to the upper mold of the fixture.

[0016] The upper end of the lower mold through hole is the upper mold positioning part; when the test fixture is used, the upper mold of the fixture is inserted into and positioned in the upper mold positioning part of the lower mold of the fixture.

[0017] The lead screw lifting assembly includes a fixed bracket that is fastened to the upper surface of the base. The fixed bracket is provided with two guide columns arranged vertically. The lifting slide is provided with a guide sleeve corresponding to each guide column, and each guide column passes through the central hole of the corresponding guide sleeve.

[0018] The lead screw lifting assembly also includes a vertically arranged drive screw. The upper end of the drive screw is mounted on the upper end of the fixed bracket via a bearing, and the lower end of the drive screw is mounted on the base via a bearing. The lifting slide has a vertically penetrating slide threaded hole corresponding to the drive screw, and the lifting slide is screwed to the drive screw through the slide threaded hole.

[0019] The upper end of the drive screw is equipped with a drive handwheel.

[0020] The base is equipped with a lifting frame.

[0021] Compared with existing technologies, this invention has the following advantages: Specifically, the claw force testing device for claw-type spring clips of this invention, through the cooperation of the driving testing component and the testing fixture, can effectively realize the claw force testing of claw-type spring clips. During the testing process, the maximum value of the claw force of the claw-type spring clip can be read through a push-pull force gauge, and the claw-type spring clip can be quickly loaded through the testing fixture. Therefore, the claw force testing device for claw-type spring clips of this invention has the advantage of novel structural design and can be effectively applied to the claw force testing of claw-type spring clips. Attached Figure Description

[0022] The present invention will be further described below with reference to the accompanying drawings, but the embodiments in the drawings do not constitute any limitation on the present invention.

[0023] Figure 1 This is a schematic diagram of the structure of this utility model.

[0024] Figure 2 This is a schematic diagram of the test fixture of this utility model.

[0025] Figure 3 This is an exploded view of the test fixture of this utility model.

[0026] Figure 4 This is a cross-sectional schematic diagram of the test fixture of this utility model.

[0027] exist Figures 1 to 4 This includes:

[0028] 1-Base; 2-Drive test assembly; 21-Screw lifting pair; 211-Fixed bracket; 2111-Guide post; 212-Drive screw; 213-Bearing; 214-Drive handwheel; 22-Lifting slide; 23-Push-pull force gauge; 24-Guide sleeve; 3-Test fixture; 31-Lower die of fixture; 311-Lower die through hole; 3111-Upper die positioning part; 32-Upper die of fixture; 321-Upper die through hole; 322-Contouring fastening part; 323-Upper die protrusion; 33-Test push rod; 4-Lifting bracket; 5-Claw-type spring. Detailed Implementation

[0029] The present invention will now be described in conjunction with specific embodiments.

[0030] Example 1, as Figure 1As shown, a claw force testing device for claw-type spring clips includes a base 1 and a drive testing component 2 mounted on the base 1. The drive testing component 2 includes a lead screw lifting pair 21 and a lifting slide 22 driven by the lead screw lifting pair 21.

[0031] Among them, such as Figure 1 As shown, the lifting slide 22 is equipped with a vertically arranged push-pull force gauge 23.

[0032] Furthermore, such as Figures 1 to 4 As shown, the claw force testing device applied to the claw-type spring sheet also includes a test fixture 3. The test fixture 3 includes a lower fixture mold 31, an upper fixture mold 32, and a test push rod 33. The core of the lower fixture mold 31 is provided with a vertical through hole 311. The lower end of the upper fixture mold 32 is provided with a contoured fastening part 322, and the core of the upper fixture mold 32 is provided with a vertical through hole 321.

[0033] In the process of testing the claw force of the claw-type spring 5 using the claw force testing device applied to the claw-type spring in Embodiment 1, the steps include:

[0034] Step a: Attach the claw-type spring clip 5 to the contour-fitting fastening part 322 of the upper mold 32 of the fixture;

[0035] Step b: The upper mold 32 of the fixture is placed at the upper end of the lower mold 31 of the fixture, the through hole 321 of the upper mold is aligned with the through hole 311 of the lower mold, and the contouring fastening part of the upper mold 32 and the claw-type spring piece 5 are respectively located in the through hole 311 of the lower mold 31 of the lower mold 31 of the fixture.

[0036] Step c: Insert the test push rod 33 from top to bottom into the upper mold through hole 321 of the upper mold 32 of the fixture;

[0037] Step d: Place the loaded and assembled test fixture 3 on the upper surface of the base 1, and align the test push rod 33 with the push-pull force gauge 23.

[0038] Step e: Operate the lead screw lifting pair 21. The lead screw lifting pair 21 drives the lifting slide 22 to move down, and the lifting slide 22 drives the push-pull force gauge 23 to move down synchronously. During this process, the test end of the push-pull force gauge 23 will gradually push the upper end of the test push rod 33 downward, thereby causing the test push rod 33 to push the claw-type spring piece 5 that is fastened to the fastening part downward. When the claw-type spring piece 5 slips off from the conformal fastening part, the maximum thrust value obtained by the push-pull force gauge 23 is the maximum claw force of the claw-type spring piece 5.

[0039] Step f: After completing the claw-type spring 5 claw force test, the claw-type spring 5 slides off from the contoured fastening part and falls onto the base 1. Then, the test fixture 3 is disassembled and subsequent test operations are performed.

[0040] It should be noted that the contour fastening part 322 in this embodiment adopts a contour structure design, that is, the outline size of the contour fastening part 322 is consistent with the claw-type spring piece 5 mounting structure.

[0041] In summary, the claw force testing device for claw-type springs in this embodiment, through the cooperation of the driving test component 2 and the test fixture 3, can effectively test the claw force of the claw-type spring 5. During the test, the maximum claw force of the claw-type spring 5 can be read by the push-pull force gauge 23, and the claw-type spring 5 can be quickly loaded through the test fixture 3. Therefore, the claw force testing device for claw-type springs in this embodiment has the advantage of novel structural design and can be effectively applied to the claw force testing of the claw-type spring 5.

[0042] Example 2, as Figure 3 and Figure 4 As shown, the difference between this embodiment 2 and embodiment 1 is that: the lower end of the upper mold 32 of the fixture is provided with an upper mold protrusion 323 that protrudes downward, the conforming fastening part is provided at the lower end of the upper mold protrusion 323, and the lower end opening of the upper mold through hole 321 extends to the lower surface of the upper mold protrusion 323.

[0043] It should be noted that when the test fixture 3 is used, the upper mold protrusion 323 of the upper mold 32 of the fixture is inserted into the lower mold through hole 311 of the lower mold 31 of the fixture.

[0044] It should be explained that the upper mold protrusion 323 in this embodiment can be designed as an integral structure or as a separate structure. For the upper mold protrusion 323 with an integral structure, the upper mold protrusion 323 and the upper mold 32 of the fixture are an integral structure. For the upper mold protrusion 323 with a separate structure, the upper mold protrusion 323 and the upper mold 32 of the fixture are screwed together. During the testing of different claw-type spring pieces 5, different upper mold protrusions 323 can be replaced as needed.

[0045] Example 3, as Figure 3 and Figure 4 As shown, the difference between this embodiment 3 and embodiment 1 is that the upper end of the lower mold through hole 311 is the upper mold positioning part 3111; when the test fixture 3 is used, the upper mold 32 of the fixture is inserted into and positioned in the upper mold positioning part 3111 of the lower mold 31 of the fixture.

[0046] During the process of placing the upper mold 32 of the fixture on the upper end of the lower mold 31 of the fixture, the upper mold 32 of the fixture can be quickly positioned by the upper mold positioning part 3111 of the lower mold through hole 311 in this embodiment.

[0047] Example 4, as Figure 1As shown, the difference between this embodiment 4 and embodiment 1 is that: the lead screw lifting pair 21 includes a fixed bracket 211 that is fastened to the upper surface of the base 1, and the fixed bracket 211 is provided with two guide posts 2111 arranged vertically; the lifting slide 22 is provided with guide sleeves 24 corresponding to each guide post 2111, and each guide post 2111 passes through the center hole of the corresponding guide sleeve 24.

[0048] The lead screw lifting pair 21 also includes a vertically arranged drive screw 212. The upper end of the drive screw 212 is mounted on the upper end of the fixed bracket 211 through a bearing 213, and the lower end of the drive screw 212 is mounted on the base 1 through a bearing 213. The lifting slide 22 has a vertically penetrating slide threaded hole corresponding to the drive screw 212, and the lifting slide 22 is screwed to the drive screw 212 through the slide threaded hole.

[0049] In addition, a drive handwheel 214 is installed at the upper end of the drive screw 212.

[0050] During the process of the lead screw lifting pair 21 driving the push-pull force gauge 23 to move down and causing the push-pull force gauge 23 to push the test push rod 33 downward, the operator operates the drive screw 212 by rotating the drive handwheel 214. The drive screw 212 drives the lifting slide 22 to move down, thereby causing the push-pull force gauge 23 to move down. During this process, in this embodiment, the lifting slide 22 is guided by the guide pair structure composed of the guide post 2111 and the guide sleeve 24.

[0051] Example 5, as Figure 1 As shown, the difference between this fifth embodiment and the first embodiment is that the base 1 is equipped with a lifting frame 4.

[0052] The lifting frame 4 in this embodiment 5 can facilitate the overall movement.

[0053] The above description is only a preferred embodiment of this utility model. For those skilled in the art, there will be changes in the specific implementation method and application scope based on the idea of ​​this utility model. The content of this specification should not be construed as a limitation of this utility model.

Claims

1. A claw force testing device for claw-type spring clips, comprising a base (1) and a drive testing assembly (2) mounted on the base (1), wherein the drive testing assembly (2) comprises a lead screw lifting pair (21) and a lifting slide (22) driven by the lead screw lifting pair (21). Its features are: The lifting slide (22) is equipped with a vertically arranged push-pull force gauge (23); The claw force testing device applied to the claw-type spring clip also includes a test fixture (3), which includes a lower mold (31), an upper mold (32), and a test push rod (33). The core of the lower mold (31) is provided with a vertical through hole (311); the lower end of the upper mold (32) is provided with a contoured fastening part (322), and the core of the upper mold (32) is provided with a vertical through hole (321). When the test fixture (3) is in use, the claw-type spring clip (5) is fastened to the contour fastening part (322) of the upper mold (32) of the fixture. The upper mold (32) is placed at the upper end of the lower mold (31) of the fixture and the upper mold through hole (321) is aligned with the lower mold through hole (311). The test push rod (33) is inserted from top to bottom into the upper mold through hole (321) of the upper mold (32) of the fixture.

2. The claw force testing device for claw-type spring clips according to claim 1, characterized in that: The lower end of the upper mold (32) of the fixture is provided with an upper mold protrusion (323) that protrudes downward, the contour fastening part (322) is provided at the lower end of the upper mold protrusion (323), and the lower end opening of the upper mold through hole (321) extends to the lower surface of the upper mold protrusion (323). When the test fixture (3) is in use, the upper mold protrusion (323) of the upper mold (32) of the fixture is inserted into the lower mold through hole (311) of the lower mold (31) of the fixture.

3. The claw force testing device for claw-type spring clips according to claim 2, characterized in that: The upper mold protrusion (323) and the upper mold of the fixture (32) are an integral structure.

4. The claw force testing device for claw-type spring clips according to claim 2, characterized in that: The upper mold protrusion (323) is screwed to the upper mold (32) of the fixture.

5. The claw force testing device for claw-type spring clips according to claim 1, characterized in that: The upper end of the lower mold through hole (311) is the upper mold positioning part (3111); when the test fixture (3) is used, the upper mold (32) of the fixture is inserted into and positioned in the upper mold positioning part (3111) of the lower mold (31) of the fixture.

6. A claw force testing device for a claw-type spring sheet according to any one of claims 1 to 5, characterized in that: The lead screw lifting pair (21) includes a fixed bracket (211) fastened to the upper surface of the base (1), and the fixed bracket (211) is provided with two guide columns (2111) arranged vertically respectively; the lifting slide (22) is provided with guide sleeves (24) corresponding to each guide column (2111), and each guide column (2111) passes through the center hole of the corresponding guide sleeve (24); The lead screw lifting pair (21) also includes a vertically arranged drive screw (212). The upper end of the drive screw (212) is mounted on the upper end of the fixed bracket (211) through a bearing (213), and the lower end of the drive screw (212) is mounted on the base (1) through a bearing (213). The lifting slide (22) has a vertically penetrating slide thread hole corresponding to the drive screw (212), and the lifting slide (22) is screwed to the drive screw (212) through the slide thread hole.

7. The claw force testing device for claw-type spring clips according to claim 6, characterized in that: The upper end of the drive screw (212) is equipped with a drive handwheel (214).

8. The claw force testing device for claw-type spring clips according to claim 1, characterized in that: The base (1) is equipped with a lifting frame (4).

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