Nut tension test fixture

Abstract

The utility model relates to a nut tension test fixture, which is used for testing the axial tension of a plurality of nuts to be tested on a plastic product, and comprises a tension display, a first lead screw assembly, a second lead screw assembly, a sliding assembly and a hanging ring, the first lead screw assembly comprises a first moving seat, the second lead screw assembly comprises a second moving seat, and the sliding assembly is arranged on the first moving seat. The sliding assembly comprises a sliding part, the second lead screw assembly is fixed to the first moving seat, the sliding assembly is fixed to the second moving seat, the tension displayer is fixed to the sliding part, a hook is arranged at one end of the bottom of the tension displayer and hooks the hanging ring, and the hanging ring is fixed to the sliding part. The lifting ring is used for being fixed to the nuts to be tested, the first moving seat, the second moving seat and the sliding part can correspondingly move in the X-axis direction, the Z-axis direction and the Y-axis direction respectively, the nut tension testing jig can assist in testing the axial tension of the multiple nuts to be tested, the testing result is accurate, and manpower can be saved.

Description

Technical Field

[0001] The utility model relates to the technical field of tension testing, in particular to a nut tension testing jig. Background Art

[0002] Nut tensile test is a common tensile test. The test method is to apply an axial load to the nut until the nut loosens from the workpiece. The tensile force value recorded by the tensile gauge when the nut loosens is the test result.

[0003] The nut tension test method currently used in the industry is a simple method. After the connector and the nut are fixedly connected, a tensile gauge is used to hook the connector. Then two people work at the same time. One person holds the workpiece on which the nut is assembled, and the other person pulls the tensile gauge. Under the action of tension, the connector drives the nut to loosen from the workpiece, and reads the force required to pull the nut loose from the workpiece. In this test method, one person holds the workpiece and the other pulls the tensile gauge. The force directions are inconsistent, which can easily lead to test errors. The two people working at the same time waste manpower. Utility Model Content

[0004] In view of this, a nut tensile testing fixture is provided, which can test multiple nuts to be tested, has more accurate test results, and saves manpower.

[0005] A nut tensile testing fixture is used to test the axial tension of multiple nuts to be tested on plastic products. It includes a tension display, a first screw assembly, a second screw assembly, a sliding assembly and a hanging ring. The first screw assembly includes a first movable seat, the second screw assembly includes a second movable seat, the sliding assembly includes a sliding portion, the second screw assembly is fixed to the first movable seat, the sliding assembly is fixed to the second movable seat, the tension display is fixed to the sliding portion, a hook is provided at one end of the bottom of the tension display, the hook hooks the hanging ring, and the hanging ring is used to be fixed to the nut to be tested. The first movable seat, the second movable seat and the sliding portion can move respectively along the X-axis, Z-axis and Y-axis directions.

[0006] Furthermore, the first screw assembly also includes a first crank handle, a first screw rod, a first screw nut and a first guide rail. The first crank handle is fixed to the first screw rod, the first screw rod is threadedly connected to the first screw nut, and the first screw nut is fixed to the first movable seat. When the first crank handle is shaken, the first screw nut can drive the first movable seat to move in the X-axis direction along the first guide rail under the action of the threaded connection.

[0007] Further, the second lead screw assembly further includes a second crank handle, a second lead screw, a second lead screw nut, and a second guide rail. The second crank handle is fixed to the second lead screw. The second lead screw is threadedly connected to the second lead screw nut. The second lead screw nut is fixed to the second moving seat. When the second crank handle is shaken, the second lead screw nut can drive the second moving seat to move along the second guide rail in the Z-axis direction under the action of the threaded connection.

[0008] Further, the sliding assembly further includes an L-shaped back plate and a slide rail. The short side portion of the L-shaped back plate is fixed to the second moving seat. The long side portion of the L-shaped back plate is fixed to the slide rail. The sliding portion is slidably connected to the slide rail. The sliding portion can drive the tensile force display to move along the slide rail in the Y-axis direction.

[0009] Furthermore, the sliding assembly further includes a plurality of hollow rollers. A plurality of convex columns are provided at the back of the sliding portion corresponding to the center positions of the plurality of hollow rollers. The plurality of convex columns are inserted into the plurality of hollow rollers one by one. The side surface of the hollow roller is concave. The slide rail is provided with a convex edge corresponding to the side surface of the hollow roller. The side surface of the hollow roller can cooperate with the convex edge so that the sliding portion can be slidably connected to the slide rail.

[0010] Furthermore, a pushing block is provided on the upper portion of the sliding portion. The pushing block is integrally formed with the sliding portion. The height of the pushing block is at least greater than the width of one finger joint. The sliding portion is driven to move by pushing the pushing block.

[0011] Further, the nut tensile force testing fixture further includes a connecting block. The second lead screw assembly is fixed to the first moving seat through the connecting block.

[0012] Further, the nut tensile force testing fixture further includes a base and a workbench. The base and the first lead screw assembly are arranged on the workbench. The base has a receiving groove and a positioning flange. The receiving groove is used for placing a plastic product. The positioning flange can cooperate with the inner ring of the plastic product.

[0013] Further, the movable stroke of the first moving seat is greater than the maximum relative distance of the nut to be tested in the X-axis direction. The lowest point of the second moving seat in the Z-axis direction is lower than the position of the nut to be tested. The movable stroke of the sliding portion is greater than the maximum relative distance of the nut to be tested in the Y-axis direction.

[0014] Further, the bottom end of the lifting ring has a threaded portion. The lifting ring is threadedly connected to the nut to be tested.

[0015] Compared with the prior art, the present utility model has at least the following beneficial effects:

[0016] First, this nut tensile test fixture can respectively control the tensile display to move in the X and Y axis directions through the first lead screw assembly and the sliding assembly. The first lead screw assembly and the sliding assembly jointly control the tensile display to move to the position directly above the nut to be tested on the workpiece. Through multi-directional movement, and the multi-directional movement stroke is greater than the nut spacing in each direction, multiple nuts to be tested can be tested.

[0017] Second, this nut tensile test fixture can control the tensile display to pull up the lifting ring upward in the Z axis direction through the second moving seat of the second lead screw assembly. The lifting ring is fixed to the nut to be tested. Slowly pull the lifting ring until the nut to be tested is separated from the workpiece or observe whether the nut to be tested does not separate from the workpiece when a certain tensile force is reached. Since it moves along the Z axis, the tensile force direction is fixed, and the situation of inconsistent force direction during manual pulling by humans will not occur, and the test result is more accurate.

[0018] Third, this nut tensile test fixture does not require two people to work together. Only one person is needed to operate. With both hands, control the tensile display to move to the position directly above the nut to be tested, and after hooking the hook of the tensile display to the lifting ring, fix the workpiece with one hand and shake the second crank with the other hand, saving manpower. Description of the Drawings

[0019] Figure 1 is a three-dimensional schematic diagram of a nut tensile test fixture according to an embodiment of the present invention.

[0020] Figure 2 is an exploded schematic diagram of a nut tensile test fixture according to an embodiment of the present invention.

[0021] Among them,

[0022] 1. Tensile display; 2. Nut to be tested; 3. First lead screw assembly; 31. First moving seat; 32. First crank; 33. First lead screw; 34. First lead screw nut; 35. First guide rail; 4. Second lead screw assembly; 41. Second moving seat; 42. Second crank; 43. Second lead screw; 44. Second lead screw nut; 45. Second guide rail; 5. Sliding assembly; 51. Sliding part; 511. Pushing block; 52. L-shaped back plate; 53. Slide rail; 54. Hollow roller; 6. Lifting ring; 7. Connecting block; 8. Base; 9. Workbench. Detailed Embodiment

[0023] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0024] Please refer to Figures 1 to 2 , which shows a nut tensile test fixture provided by an embodiment of the present invention for testing the axial tensile force of multiple nuts 2 on a plastic product, including a tensile force display 1, and further including a first lead screw assembly 3, a second lead screw assembly 4, a sliding assembly 5, and a lifting ring 6. The first lead screw assembly 3 includes a first moving seat 31, the second lead screw assembly 4 includes a second moving seat 41, the sliding assembly 5 includes a sliding part 51. The second lead screw assembly 4 is fixed to the first moving seat 31, the sliding assembly 5 is fixed to the second moving seat 41, the tensile force display 1 is fixed to the sliding part 51. A hook is provided at one end of the bottom of the tensile force display 1, and the hook hooks the lifting ring 6. The lifting ring 6 is used to fix to the nut 2 to be tested. The first moving seat 31, the second moving seat 41, and the sliding part 51 can move correspondingly along the X-axis, Z-axis, and Y-axis directions respectively.

[0025] Specifically, the first lead screw assembly 3 further includes a first crank 32, a first lead screw 33, a first lead screw nut 34, and a first guide rail 35. The first crank 32 is fixed to the first lead screw 33. The first lead screw 33 is threadedly connected to the first lead screw nut 34. The first lead screw nut 34 is fixed to the first moving seat 31. By shaking the first crank 32, the first lead screw nut 34 can drive the first moving seat 31 to move along the first guide rail 35 in the X-axis direction under the action of the threaded connection.

[0026] Specifically, the second lead screw assembly 4 further includes a second crank 42, a second lead screw 43, a second lead screw nut 44, and a second guide rail 45. The second crank 42 is fixed to the second lead screw 43. The second lead screw 43 is threadedly connected to the second lead screw nut 44. The second lead screw nut 44 is fixed to the second moving seat 41. By shaking the second crank 42, the second lead screw nut 44 can drive the second moving seat 41 to move along the second guide rail 45 in the Z-axis direction under the action of the threaded connection.

[0027] Specifically, the sliding assembly 5 also includes an L-shaped back panel 52 and a slide rail 53. The short side end of the L-shaped back panel 52 is fixed to the second movable seat 41, and the long side end of the L-shaped back panel 52 is fixed to the slide rail 53. The sliding portion 51 is slidably connected to the slide rail 53. The sliding portion 51 can drive the tension display 1 to move along the slide rail 53 in the Y-axis direction.

[0028] More specifically, the sliding assembly 5 also includes a plurality of hollow rollers 54, and a plurality of bosses are provided on the back of the sliding portion 51 corresponding to the center positions of the plurality of hollow rollers 54, and the plurality of bosses are inserted into the plurality of hollow rollers 54 one by one. The side surfaces of the hollow rollers 54 are concave, and the sliding rail 53 is provided with a convex edge corresponding to the side surfaces of the hollow rollers 54, and the side surfaces of the hollow rollers 54 can cooperate with the convex edge so that the sliding portion 51 can be slidably connected to the sliding rail 53.

[0029] More specifically, a pushing block 511 is provided on the upper portion of the sliding portion 51 . The pushing block 511 is integrally formed with the sliding portion 51 . The height of the pushing block 511 is at least greater than the width of one knuckle. The sliding portion 51 is driven to move by pushing the pushing block 511 .

[0030] Specifically, the nut tensile testing fixture further includes a connecting block 7 , and the second screw assembly 4 is fixed to the first movable seat 31 via the connecting block 7 .

[0031] In some specific embodiments, when the first crank handle 32 is shaken, the first lead screw 33 rotates and drives the first movable seat 31 to move, and the first movable seat 31 is fixed to the second lead screw assembly 4 through the connecting block 7, and then the first lead screw assembly 3 drives the second lead screw assembly 4 to move in the X-axis direction, and when the second crank handle 42 is shaken, the second lead screw 43 rotates and drives the second movable seat 41 to move in the Z-axis direction, and the L-shaped back plate 52 is fixed to the second movable seat 41, and the L-shaped back plate 52 is connected to the sliding part 51, so that the second movable seat 41 moves and drives the tension display 1 to move in the Z-axis direction, pushing the pushing block 511, and the sliding part 51 drives the tension display 1 to move in the Y-axis direction along the slide rail 53, that is, the tension display 1 can move along the X, Y, and Z axes under the linkage action of the first lead screw assembly 3, the second lead screw assembly 4, and the sliding assembly 5.

[0032] Specifically, the nut tensile testing fixture also includes a base 8 and a workbench 9. The base 8 and the first screw assembly 3 are arranged on the workbench 9. The base 8 has a receiving groove and a positioning flange. The receiving groove is used to place the plastic product, and the positioning flange can cooperate with the inner ring of the plastic product.

[0033] Specifically, the movable stroke of the first movable seat 31 is greater than the maximum relative distance of the nut 2 to be measured in the X-axis direction. The lowest point of the second movable seat 41 in the Z-axis direction is lower than the position of the nut 2 to be measured. The movable stroke of the sliding part 51 is greater than the maximum relative distance of the nut 2 to be measured in the Y-axis direction.

[0034] Specifically, the bottom end of the lifting ring 6 has a threaded portion, and the lifting ring 6 is threadedly connected to the nut 2 to be measured. In some specific embodiments, lifting rings 6 of different sizes can be replaced according to different nut sizes.

[0035] In summary, this nut tensile test fixture can respectively control the tensile display to move in the X and Y axis directions through the first lead screw assembly 3 and the sliding assembly 5. The first lead screw assembly 3 and the sliding assembly 5 jointly control the tensile display to move to the position directly above the nut 2 to be measured on the workpiece. This test fixture can test multiple nuts 2 to be measured through multi-directional movement, and the multi-directional movement stroke is greater than the nut pitch in each direction. It can also control the tensile display 1 to pull the lifting ring 6 upward by the upward movement of the second movable seat 41 of the second lead screw assembly 4 in the Z-axis direction. Since the lifting ring 6 is fixed to the nut 2 to be measured, the lifting ring 6 is slowly pulled until the nut 2 to be measured is separated from the workpiece or it is observed whether the nut 2 to be measured does not separate from the workpiece when a certain tensile force is reached. Since it moves along the Z-axis, the tensile force direction is fixed, and the situation of inconsistent force directions during manual pulling by humans will not occur, and the test result is more accurate. At the same time, this nut tensile test fixture does not require two people to work together. Only one person is needed to operate. With both hands, the tensile display 1 is controlled to move to the position directly above the nut 2 to be measured, and after the hook of the tensile display 1 is hooked onto the lifting ring 6, one hand fixes the workpiece and the other hand shakes the second crank 42, saving manpower.

[0036] It should be noted that the present invention is not limited to the above embodiments. According to the creative spirit of the present invention, those skilled in the art can also make other changes, and these changes made based on the creative spirit of the present invention should all be included within the scope protected by the present invention.

Claims

1. A nut tension test fixture for testing the axial tension of multiple nuts to be tested on plastic products, including a tension display, characterized in that: It also includes a first screw assembly, a second screw assembly, a sliding assembly and a hanging ring. The first screw assembly includes a first moving seat, the second screw assembly includes a second moving seat, the sliding assembly includes a sliding part, the second screw assembly is fixed to the first moving seat, the sliding assembly is fixed to the second moving seat, the tension display is fixed to the sliding part, a hook is provided at one end of the bottom of the tension display, the hook hooks the hanging ring, and the hanging ring is used to be fixed to the nut to be measured. The first moving seat, the second moving seat and the sliding part can move accordingly along the X-axis, Z-axis and Y-axis directions respectively.

2. A nut tensile test fixture as claimed in claim 1, characterized in that: The first screw assembly also includes a first crank handle, a first screw, a first screw nut and a first guide rail. The first crank handle is fixed to the first screw, the first screw is threadedly connected to the first screw nut, and the first screw nut is fixed to the first movable seat. When the first crank handle is shaken, the first screw nut can drive the first movable seat to move in the X-axis direction along the first guide rail under the action of the threaded connection.

3. A nut tensile test fixture as claimed in claim 1, characterized in that: The second screw assembly also includes a second crank handle, a second screw, a second screw nut and a second guide rail. The second crank handle is fixed to the second screw, the second screw is threadedly connected to the second screw nut, and the second screw nut is fixed to the second movable seat. When the second crank handle is shaken, the second screw nut can drive the second movable seat to move in the Z-axis direction along the second guide rail under the action of the threaded connection.

4. A nut tensile test fixture according to claim 1, characterized in that: The sliding assembly also includes an L-shaped back panel and a slide rail. The short side of the L-shaped back panel is fixed to the second movable seat, and the long side of the L-shaped back panel is fixed to the slide rail. The sliding part is slidably connected to the slide rail, and the sliding part can drive the tension display to move along the slide rail in the Y-axis direction.

5. A nut tensile test fixture as claimed in claim 4, characterized in that: The sliding assembly also includes a plurality of hollow rollers, and a plurality of protrusions are provided on the back of the sliding part corresponding to the center position of the plurality of hollow rollers, and the plurality of protrusions are inserted into the plurality of hollow rollers one by one. The side surfaces of the hollow rollers are concave, and the sliding rails are provided with convex edges corresponding to the side surfaces of the hollow rollers. The side surfaces of the hollow rollers can cooperate with the convex edges so that the sliding part can be slidably connected to the sliding rails.

6. A nut tensile test fixture as claimed in claim 5, characterized in that: A pushing block is provided on the upper portion of the sliding portion. The pushing block is integrally formed with the sliding portion. The height of the pushing block is at least greater than the width of one knuckle. The sliding portion is driven to move by pushing the pushing block.

7. The nut tensile test fixture according to claim 1, characterized in that: The nut tensile testing fixture further includes a connecting block, and the second screw assembly is fixed to the first moving seat via the connecting block.

8. The nut tensile test fixture according to claim 1, characterized in that: The nut tensile testing fixture also includes a base and a workbench. The base and the first screw assembly are arranged on the workbench. The base has a receiving groove and a positioning flange. The receiving groove is used to place the plastic product, and the positioning flange can cooperate with the inner ring of the plastic product.

9. The nut tensile test fixture according to claim 1, characterized in that: The movable stroke of the first movable seat is greater than the maximum relative distance of the nut to be measured in the X-axis direction, the lowest point of the second movable seat in the Z-axis direction is lower than the position of the nut to be measured, and the movable stroke of the sliding part is greater than the maximum relative distance of the nut to be measured in the Y-axis direction.

10. The nut tensile test fixture according to claim 1, characterized in that: The bottom end of the hanging ring has a threaded portion, and the hanging ring is threadedly connected to the nut to be tested.

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