Jig for measuring elastic force of elastic sheet

Abstract

The utility model discloses an elastic sheet elastic force measuring tool comprising a tool body which is provided with a placing position and an elastic force testing hole; a first through hole is formed in the jig body; the elastic sheet comprises a bending part, a first force arm and a second force arm; the limiting piece is arranged in the first through hole in a penetrating mode and arranged on the inner side of the bending part so that the bending part can be limited in the containing position, and the second force arm is arranged under the elastic force testing hole so that the elastic piece can not move in the abutting and pressing testing process; and the test rod is used for carrying out a pressing test on the second force arm and is arranged in the elastic force test hole in a penetrating manner from top to bottom, and the upper end of the test rod is exposed out of the upper end of the jig body. According to the utility model, the limiting piece is a bolt type limiting stopper, that is, the elastic piece can be stably limited in the jig body through the limiting piece, so that the elastic piece can be ensured to be stably tested without moving when the testing rod is pressed downwards for testing, and the force of the elastic piece can be accurately measured.

Description

Technical field:

[0001] The utility model relates to the technical field of force measuring jigs, in particular to a shrapnel elastic force measuring jig. Background technology:

[0002] Metal springs are a kind of elastic components, usually made of stainless steel, copper, iron and manganese. Metal springs mainly rely on elasticity to control the movement of mechanical parts and convert mechanical kinetic energy into deformation energy.

[0003] The elastic force of the shrapnel is one of the most important factors affecting the function of the shrapnel. The elastic force of the shrapnel needs to be in a suitable range for the shrapnel to work properly. Therefore, in production, elastic force testing equipment is used to test whether the elastic force of the shrapnel is qualified to avoid affecting the normal use of the switch.

[0004] At present, common elastic force testing equipment on the market, such as: the utility model patent application with patent announcement number CN219915227U discloses a shrapnel fatigue testing tool, which includes: a base, a mounting seat is provided on the base, a mounting hole is provided on the mounting seat, a fixed support is provided in the mounting hole, one end of the fixed support extends outward to form a first protrusion, a push seat is provided in the fixed support for rolling, one end of the push seat extends outward to form a second protrusion, a plurality of curved shrapnel are provided between the first protrusion and the second protrusion, one end of the shrapnel is fixedly connected to the first protrusion, and the other end of the shrapnel is in contact with the second protrusion, the shrapnel always maintains elastic force, the elastic force of the shrapnel is greater than the rolling friction between the fixed support and the push seat, an eccentric wheel is provided on the end face of the push seat, the eccentric wheel is in contact with the end face of the push seat, the eccentric wheel is connected to the driving component through a rotating shaft, and the eccentric wheel is used to drive the push seat to move in the fixed support; this technical solution can test multiple shrapnel at the same time.

[0005] However, this existing shrapnel fatigue test tool has the following shortcomings due to its own structural design characteristics:

[0006] In this technical solution, when testing the spring piece, it is necessary to fix the spring piece on the first protrusion by bolts, and test it through the cooperation between the push seat and the fixed support. When testing the spring piece limited by the bolts, the compression movement of the push seat will cause the spring piece to produce a large rebound force, which is easy to move and the test is unstable. In addition, in this technical solution, since the eccentric wheel and the push seat are in point contact, when testing, multiple spring pieces need to be tested at the same time to ensure that the force on the push seat is uniform. If there is only a single spring piece, the force will be uneven and normal testing cannot be performed.

[0007] In view of this, the inventor proposes the following technical solution. Utility model content:

[0008] The utility model aims to overcome the deficiencies of the prior art and provide a shrapnel elastic force measuring tool.

[0009] In order to solve the above technical problems, the utility model adopts the following technical solutions: a spring force measuring jig, comprising: a jig body, a placement position for accommodating the spring, and a vertically distributed spring force test hole above the placement position; a first through hole horizontally penetrating the placement position is provided on the jig body;

[0010] The spring piece includes a bending portion and a first force arm and a second force arm extending outward from the lower end and the upper end of the bending portion respectively, and the outer side of the bending portion contacts the inner wall of the placement position;

[0011] A limiting member is inserted into the first through hole and is placed inside the bent portion to limit the bent portion in the placement position. The second force arm is placed directly below the elastic force test hole to prevent the spring from moving during the pressure test.

[0012] A test rod for carrying out a pressure test on the second force arm is inserted from top to bottom into the elastic force test hole, and the upper end of the test rod is exposed outside the upper end of the fixture body.

[0013] Furthermore, in the above technical solution, the limit member includes a pulling end for axially limiting the limit member and for being pulled by a human hand, an insertion end formed outward from the pulling end and used to pass through the bent portion, and a mating end formed between the pulling end and the insertion end and used to match the first through hole, wherein the inner diameter of the mating end is larger than the inner diameter of the insertion end, so that when the limit member is inserted into the first through hole, a gap is formed between the insertion end and the inner wall of the placement position for accommodating the bent portion.

[0014] Furthermore, in the above technical solution, the insertion end portion of the limit member extends out of the first through hole, and a through hole is formed on the protruding portion of the insertion end, and a limit pin for axially limiting the limit member is detachably provided in the through hole.

[0015] Furthermore, in the above technical solution, the upper inner wall of the placement position has an inclined surface, and the second force arm is in contact with the upper inner wall of the placement position; the first force arm is in contact with the lower inner wall of the placement position.

[0016] Furthermore, in the above technical solution, the jig body includes a bottom plate portion formed at the lower end of the jig body, a top plate portion formed at the upper end of the jig body, and a support portion between the bottom plate portion and the top plate portion, the elastic force test hole is arranged on the top plate portion, and the placement position is located between the bottom plate portion and the top plate portion.

[0017] Furthermore, in the above technical solution, the upper end of the test rod is formed with a convex portion for pressing or connecting with an external test machine, and the lower end of the test rod is formed with a pressing portion for pressing and contacting with the spring sheet, and the lower surface of the pressing portion has an arc surface.

[0018] Furthermore, in the above technical solution, the outer wall of the limiter is also in contact with the inner side surface of the bending portion.

[0019] Furthermore, in the above technical solution, a sinking groove for limiting the spring piece is opened in the placement position, one end of the sinking groove is connected to the first through hole, the first force arm is placed in the sinking groove, and is limited by the sinking groove.

[0020] Furthermore, in the above technical solution, the cross-sectional shape of the fixture body is C-shaped or reverse C-shaped.

[0021] After adopting the above technical solution, the utility model has the following beneficial effects compared with the prior art: in the utility model, the limiter is a latch-type limiter, that is, the spring piece can be stably limited in the fixture body through the limiter, so that when the test rod is pressed downward for testing, the spring piece can be guaranteed not to move, stable testing, and accurate measurement of the spring piece strength. In addition, unlike the existing structure, the fixture body of the utility model forms a semi-enclosed structure for the spring piece, which is suitable for measuring a single spring piece, and is simple to operate and convenient for users to operate. Description of the drawings:

[0022] Figure 1 It is a three-dimensional schematic diagram of the utility model;

[0023] Figure 2 It is a structural schematic diagram of the fixture body in the utility model;

[0024] Figure 3 It is a structural schematic diagram of the elastic force testing rod in the utility model;

[0025] Figure 4 It is a structural schematic diagram of the shrapnel in the utility model;

[0026] Figure 5 It is a structural schematic diagram of the position limiting member in the utility model;

[0027] Figure 6 It is an exploded schematic diagram of the utility model;

[0028] Figure 7 It is a cross-sectional view of the utility model. Specific implementation method:

[0029] The utility model is further described below in conjunction with specific embodiments and drawings.

[0030] See Figures 1 to 7 As shown, a spring piece elastic force measuring jig is provided, which comprises: a jig body 1, a placement position 5 for accommodating a spring piece 2 is provided on the jig body 1, and a vertically distributed elastic force test hole 15 is provided above the placement position 5; a first through hole 13 is provided on the jig body 1 and horizontally penetrates the placement position 5; the spring piece 2 comprises a bending portion 21 and a first force arm 22 and a second force arm 23 extending outward from the lower end and the upper end of the bending portion 21, respectively, and the bending portion The outer side of the first through hole 13 is in contact with the inner wall of the placement position 5; the stopper 3 is inserted into the first through hole 13 and placed inside the bending portion 21 to limit the bending portion 21 in the placement position 5, and the second force arm 23 is placed directly below the elastic force test hole 15 to prevent the spring 2 from moving during the pressure test; the test rod 4 for the pressure test of the second force arm 23 is inserted from top to bottom into the elastic force test hole 15, and the upper end of the test rod 4 is exposed outside the upper end of the fixture body 1. Further, the outer wall of the stopper 3 is also in contact with the inner side of the bending portion 21.

[0031] Since the utility model aims to realize that the limiter 3 fixes the spring piece 2 during the test so that the spring piece 2 remains stable and does not move, that is, the limiter 3 passes through the bent portion 21 to fix the spring piece 2. Specifically, after the spring piece 2 is installed in the placement position 5, the outer side of the bent portion 21 of the spring piece 2 contacts the inside of the placement position 5, the first force arm 22 and the second force arm 23 are in a free state or in a slightly compressed state, and the second force arm 23 is located directly below the elastic force test hole 15, so that the test rod 4 passes downward through the elastic force test hole 15. The test hole 15 is used to press against the second force arm 23 to realize the elastic force test, and since a first through hole 13 is provided on the fixture body 1, which passes through the placement position 5 and is used for inserting the limiting member 3, the limiting member 3 passes through the bending portion 21 through the first through hole 13 and limits the spring piece 2 in the placement position 5, wherein the limiting member 3 is penetrated through the inner side of the bending portion 21, so that it can cooperate with the placement position 5 to limit the spring piece, so that the spring piece 2 does not move during the pressure test, thereby ensuring the elastic force test quality of the spring piece.

[0032] In this embodiment, a latch-type limiter is used. Specifically, the limit member 3 includes a pulling end 31 for axially limiting the limit member 3 and for pulling by a human hand, an insertion end 32 formed outward from the pulling end 31 and used to pass through the bending portion 21, and a mating end 33 formed between the pulling end 31 and the insertion end 32 and matching the first through hole 13, wherein the inner diameter of the mating end 33 is larger than the inner diameter of the insertion end 32, so that when the limit member 3 is inserted into the first through hole 13, a gap is formed between the insertion end 32 and the inner wall of the placement position 5 for accommodating the bending portion 21.

[0033] See Figure 6As shown, in order to further enhance the stability of the spring piece 2 during measurement, the present invention can also add a stop pin 30 to the stop member 3. Specifically, the insertion end 32 of the stop member 3 partially extends out of the first through hole 13, and a through hole 321 is formed on the extended portion of the insertion end 32. The through hole 321 is detachably provided with a stop pin 30 for axially limiting the stop member 3. The stop pin 30 can lock the stop member 3 when the spring piece 2 is measured, so as to avoid inaccurate measurement caused by accidental sliding of the stop member 3, and further enhance the stability of the measurement.

[0034] The placement position 5 is provided with a sinking groove 51 for horizontally limiting the spring piece 2, one end of which is connected to the first through hole 13, and the first force arm 22 is placed in the sinking groove 51 and limited by the sinking groove 51. The setting of the sinking groove 51 to limit the spring piece 2 can effectively prevent the spring piece 2 from shifting to the left and right during the pressure measurement and causing movement, and can also make the removal and insertion of the spring piece 2 smoother.

[0035] See Figure 1 , Figure 2 and Figure 4 As shown, the jig body 1 forms a semi-enclosed structure for the spring piece 2, which effectively prevents the spring piece 2 from moving. Specifically, the longitudinal section of the jig body 1 is C-shaped or inverted C-shaped. The jig body 1 includes a bottom plate portion 10 formed at the lower end of the jig body 1, a top plate portion 11 formed at the upper end of the jig body 1, and a support portion 12 between the bottom plate portion 10 and the top plate portion 11. The elastic force test hole 15 is arranged on the top plate portion 11, and the placement position 5 is located between the bottom plate portion 10 and the top plate portion 11. The upper inner wall of the placement position 5 has an inclined surface, and the second force arm 23 is attached to the upper inner wall of the placement position 5; the first force arm 22 is attached to the lower inner wall of the placement position 5. Among them, the shape of the spring piece 2 is roughly V-shaped, and the upper inner wall and the lower inner wall of the placement position 5 can well accommodate the spring piece 2, and make the first force arm 22 and the second force arm 23 in a free state or in a slightly compressed state.

[0036] The upper end of the test rod 4 is formed with a convex portion 41 for pressing or connecting with an external test machine, and the lower end of the test rod 4 is formed with a pressing portion 42 for pressing and contacting with the spring sheet 2, and the lower surface of the pressing portion 42 has an arc surface. The arc surface of the pressing portion 42 enables the test rod 4 to better perform a pressing test on the spring sheet 2.

[0037] In summary, in the present invention, the limiter 3 is a latch-type limiter, that is, the spring piece 2 can be stably limited in the fixture body 1 through the limiter 3, so that when the test rod 4 is pressed downward for testing, the spring piece 2 can be guaranteed not to move, and the stable test can accurately measure the force of the spring piece. In addition, unlike the existing structure, the fixture body 1 of the present invention forms a semi-enclosed structure for the spring piece 2, which is suitable for measuring a single spring piece 2, and is simple to operate, which is convenient for users to operate.

[0038] Of course, the above description is only a specific embodiment of the present invention and is not intended to limit the scope of implementation of the present invention. Any equivalent changes or modifications made according to the structure, characteristics and principles described in the patent application scope of the present invention should be included in the patent application scope of the present invention.

Claims

1. A shrapnel elastic force measuring jig, characterized in that: include: A jig body (1), the jig body (1) being provided with a placement position (5) for accommodating the spring piece (2), the jig body (1) being provided with vertically distributed elastic force test holes (15) above the placement position (5); and the jig body (1) being provided with a first through hole (13) horizontally penetrating the placement position (5); The spring piece (2) comprises a bending portion (21) and a first force arm (22) and a second force arm (23) extending outward from the lower end and the upper end of the bending portion (21) respectively, and the outer side of the bending portion (21) contacts the inner wall of the placement position (5); A limiting member (3) is inserted into the first through hole (13) and is disposed inside the bent portion (21) to limit the bent portion (21) within the placement position (5); the second force arm (23) is disposed directly below the elastic force test hole (15) to prevent the spring sheet (2) from moving during the pressure test; A test rod (4) for performing a pressure test on the second force arm (23) is inserted from top to bottom into the elastic force test hole (15), and the upper end of the test rod (4) is exposed outside the upper end of the fixture body (1).

2. A shrapnel elastic force measuring jig according to claim 1, characterized in that: The limiting member (3) comprises a pulling end (31) for axially limiting the limiting member (3) and allowing a human hand to pull it, an inserting end (32) formed outward from the pulling end (31) and used to pass through the bending portion (21), and a matching end (33) formed between the pulling end (31) and the inserting end (32) and used to match the first through hole (13), wherein the inner diameter of the matching end (33) is larger than the inner diameter of the inserting end (32), so that when the limiting member (3) is inserted into the first through hole (13), a gap is formed between the inserting end (32) and the inner wall of the placement position (5) for accommodating the bending portion (21).

3. A shrapnel elastic force measuring jig according to claim 2, characterized in that: The insertion end (32) of the limiting member (3) partially protrudes from the first through hole (13), and a through hole (321) is formed on the protruding portion of the insertion end (32), and a limiting pin (30) for axially limiting the limiting member (3) is detachably provided in the through hole (321).

4. The shrapnel elastic force measuring jig according to claim 1, characterized in that: The upper inner wall of the placement position (5) has an inclined surface, and the second force arm (23) is in contact with the upper inner wall of the placement position (5); the first force arm (22) is in contact with the lower inner wall of the placement position (5).

5. The shrapnel elastic force measuring jig according to claim 1, characterized in that: The jig body (1) comprises a bottom plate portion (10) formed at the lower end of the jig body (1), a top plate portion (11) formed at the upper end of the jig body (1), and a support portion (12) between the bottom plate portion (10) and the top plate portion (11); the elastic force testing hole (15) is arranged on the top plate portion (11); and the placement position (5) is located between the bottom plate portion (10) and the top plate portion (11).

6. The shrapnel elastic force measuring jig according to claim 1, characterized in that: The upper end of the test rod (4) is formed with a convex portion (41) for being pressed or connected to an external test machine, and the lower end of the test rod (4) is formed with a pressing portion (42) for pressing and contacting the spring sheet (2), and the lower surface of the pressing portion (42) has an arc surface.

7. The shrapnel elastic force measuring jig according to claim 1, characterized in that: The outer wall of the limiting member (3) is also in contact with the inner side surface of the bending portion (21).

8. A shrapnel elastic force measuring jig according to any one of claims 1 to 7, characterized in that: A sinking groove (51) for limiting the position of the spring piece (2) is provided in the placement position (5); one end of the sinking groove (51) is connected to the first through hole (13); the first force arm (22) is placed in the sinking groove (51) and is limited by the sinking groove (51).

9. A shrapnel elastic force measuring jig according to any one of claims 1 to 7, characterized in that: The cross-sectional shape of the fixture body (1) is C-shaped or inverted C-shaped.

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