Clamp for short and small sample and tension testing device
By designing a fixture composed of an adjustment rod and a clamping strip, combined with a tensile test device, the problem of difficulty in clamping a short sample in traditional fixtures is solved, and stable clamping and tensile testing of short samples is achieved, which improves the test reliability.
Patent Information
- Application Number
- CN202421409375.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-19
- Publication Date
- 2025-07-22
- Estimated Expiration
- 2034-06-19
AI Technical Summary
Traditional fixtures are difficult to effectively clamp short samples, resulting in the inability to complete tensile performance tests, which poses a risk of falling off and affects product competitiveness.
A clamp for short samples is designed, including an adjustment rod, multiple clamp strips and adjustment rings. By controlling the spacing of the clamp strips, multiple clamp strips are realized to surround the clamping of the specimen. Combined with the fixing and lifting mechanism of the tensile test device, the clamping force and convenient operation are ensured.
Effective clamping and tension testing of short samples is achieved, reducing the risk of shedding and improving the reliability and competitiveness of product testing.
Smart Images
Figure CN223139182U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of specimen testing, in particular to a fixture for short specimens and a tensile testing device. Background Art
[0002] With the continuous development of the consumer electronics industry, in order to meet different customer needs, the functions of electronic products are becoming more and more diverse, the structures of products are becoming more and more changeable, and electronic accessories are increasingly pursuing refinement, with the size gradually shrinking. The traditional fixture method has difficulty in clamping short structures for tensile testing, so that the tensile performance test cannot be completed. The risk of detachment of short structures during use without tensile testing is doubtful. At present, completing the reliability test of the pull-off force of short structures is an important factor in improving product competitiveness. Summary of the Utility Model
[0003] In view of this, the purpose of the utility model is to provide a fixture for short specimens, aiming to effectively clamp short specimens.
[0004] The utility model provides a fixture for short specimens, including an adjusting rod, a plurality of clamping strips and an adjusting ring. The plurality of clamping strips have a tightening end adjacent to each other and a dispersible grasping end. The tightening end is connected to one end of the adjusting rod, and the grasping ends of the plurality of clamping strips are used for clamping short specimens. The adjusting ring is adjustably sleeved outside the adjusting rod. As the adjusting ring approaches or deviates from the grasping end, the adjusting ring binds the plurality of clamping strips to clamp the short specimens, or loosens the plurality of clamping strips to pick up and place the short specimens.
[0005] In one embodiment, the adjusting ring has a driving part and a constraining part. The driving part is in threaded cooperation with the adjusting rod. The constraining part is arranged on the side of the driving part close to the clamping strip. As the driving part approaches the clamping strip, the constraining part is pushed by the driving part to tighten the grasping end within the constraining part.
[0006] In one embodiment, the diameter width of the driving part is greater than that of the constraining part.
[0007] In one embodiment, the grasping ends of the plurality of clamping strips are cylindrical when bound by the adjusting ring.
[0008] In one embodiment, the grasping ends of the plurality of clamping strips are tubular when bound by the adjusting ring. The grasping end includes a first grasping section and a second grasping section. The first grasping section is located between the second grasping section and the tightening end, and the inner diameter of the second grasping section is greater than that of the first grasping section.
[0009] In one embodiment, the inner wall of one end of the second grasping section, which is away from the first grasping section, gradually converges inward until the end is sharp, so as to reduce the contact area between the second grasping section and the short specimen.
[0010] The present utility model also provides a tensile test device for testing the tensile strength of short specimens, which includes a fixing mechanism, a lifting mechanism, and a fixture for short specimens as described above. The fixing mechanism is used to fix the product so that the fixture for short specimens can clamp the short specimen of the product. The lifting mechanism is connected to one end of the adjusting rod away from the clamping strip and is used to apply a tensile force to the fixture for short specimens.
[0011] In one embodiment, the fixture for short specimens further includes a hanging member. The hanging member is arranged at one end of the adjusting rod away from the clamping strip. The lifting mechanism has a hook member, and the hook member is used to connect the hanging member to lift the fixture for short specimens.
[0012] In one embodiment, the fixing mechanism includes a plurality of clamping blocks and a regulator. The regulator is used to adjust the distance between the plurality of clamping blocks to fix or release the short specimen.
[0013] In one embodiment, the tensile test device further includes a base frame. The base frame includes a placement table and a long sliding plate. The length direction of the long sliding plate is perpendicular to the placement table. The placement table is used to place the fixing mechanism, and the lifting mechanism is slidably connected to the long sliding plate.
[0014] The fixture for short specimens provided by the present utility model connects a plurality of clamping strips to the end of the adjusting rod and controls the distance between the plurality of clamping strips through an adjusting ring, so that the plurality of clamping strips surround and clamp the short specimen. The adjusting rod and the adjusting ring increase the control over the clamping strips, facilitating the clamping of the short specimen and the control of the clamping force. Description of the Drawings
[0015] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required to be used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present utility model, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can be obtained based on these drawings without creative efforts.
[0016] Figure 1 It is a three-dimensional structure schematic diagram of the product.
[0017] Figure 2 It is Figure 1 A partial schematic diagram of the short specimen in
[0018] Figure 3Explosion schematic diagram of the fixture for short specimens provided in the first embodiment of the present utility model.
[0019] Figure 4 is Figure 3 Schematic three-dimensional structure diagram of part B in [reference] when being constrained.
[0020] Figure 5 is Figure 3 Planar schematic diagram of the fixture for short specimens in [reference].
[0021] Figure 6 is Figure 1 Planar schematic diagram of the fixture for short specimens in [reference] when clamping the product.
[0022] Figure 7 is Figure 6 C-C sectional schematic diagram of the fixture for short specimens in [reference] when clamping the product.
[0023] Figure 8 is Figure 7 Schematic structure diagram of part D in [reference].
[0024] Figure 9 Schematic three-dimensional structure diagram of the tensile testing device provided in the first embodiment of the present utility model.
[0025] Figure 10 is Figure 9 Schematic structure diagram of part E in [reference].
[0026] Reference numerals: 10, fixture for short specimens; 11, adjusting rod; 12, clamping strip; 121, tightening end; 122, grasping end; 122a, first grasping section; 122b, second grasping section; 13, adjusting ring; 131, driving part; 132, constraining part; 14, hanging part; 141, hanging hole; 20, fixing mechanism; 21, clamping block; 22, adjuster; 30, lifting mechanism; 31, hook member; 40, connecting member; 41, hook part; 50, base frame; 51, placing table; 52, long sliding plate; 60, product; 61, base; 62, short specimen. Detailed implementation manners
[0027] Next, specific embodiments of the present utility model will be described in detail with reference to the accompanying drawings. Based on the description of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts fall within the scope of protection of the present utility model.
[0028] In the description of the present utility model, unless otherwise clearly defined and limited, terms such as "arrangement", "installation", "connection", etc. shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms can be understood according to specific circumstances.
[0029] The orientation or positional relationship indicated by terms such as "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the utility model product is usually placed during use. It is only for the convenience of description and simplification of the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model.
[0030] Terms such as "first", "second", "third", etc. are only used to distinguish elements with similar attributes, rather than indicating or implying relative importance or a specific order.
[0031] The term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion. In addition to the listed elements, it may also include other elements not explicitly listed.
[0032] First Embodiment
[0033] Please refer to Figures 1-8 , an embodiment of the present utility model provides a fixture 10 for short specimens, including an adjusting rod 11, a plurality of clamping bars 12, and an adjusting ring 13. The plurality of clamping bars 12 have a tightened end 121 adjacent to each other and a dispersible grasping end 122. The tightened end 121 is connected to one end of the adjusting rod 11, and the grasping ends 122 of the plurality of clamping bars 12 are used to clamp the short specimen 62; the adjusting ring 13 is adjustably sleeved outside the adjusting rod 11. As the adjusting ring 13 approaches or departs from the grasping end 122, the adjusting ring 13 restrains the plurality of clamping bars 12 to clamp the short specimen 62, or loosens the plurality of clamping bars 12 to pick up and place the short specimen 62.
[0034] Specifically, the current conventional operation for clamping small structural devices is to clamp them with tweezers. The ends of the tweezers are small and slippery, which can easily clamp short structures. However, the tweezers only have two force rods, and the clamping force is insufficient and easy to fall off, which is not suitable for use in the test stage of the product 60. In this embodiment, by setting a plurality of clamping strips 12, the short sample 62 can be clamped in the plurality of clamping strips 12, and the spacing of the plurality of clamping strips 12 is adjustably controlled by the adjustment ring 13, and the clamping force is large enough to resist the lifting force in the tensile test. The plurality of clamping strips 12 can be a plurality of independent clamping strips 12, and one end of the plurality of clamping strips 12 is tightened to form a tightening end 121, and the other end remains loose to form a gripping end 122, or one end of a long rod is divided into a plurality of strips to form a gripping section, and the other end remains in its original state to form a tightening end 121. The tightening end 121 extends along the axial direction of the adjustment rod 11 and is connected to one end of the adjustment rod 11. The adjusting ring 13 is sleeved outside the adjusting rod 11, and the adjusting ring 13 can move along the axial direction of the adjusting rod 11. The inner diameter of the adjusting ring 13 is slightly larger than the outer diameter of the adjusting rod 11, so that the adjusting ring 13 can move outside the adjusting rod 11 under the driving force of a certain force, and avoids sliding down due to gravity when there is no contact. The specific matching method can be clearance matching plus some friction settings to prevent falling, thread matching, and limiting the position of the side jack.
[0035] Furthermore, the inner diameter of the adjusting ring 13 is preferably slightly larger than the outer diameter of the multiple clamping strips 12 in the bound state. When the adjusting ring 13 is pushed toward the clamping strips 12, the adjusting ring 13 gradually gathers the multiple clamping strips 12 inside. The closer the adjusting ring 13 is to the gripping end 122, the smaller the spacing between the multiple clamping strips 12, and the better the sample can be clamped. By clamping a short sample 62 with a rod-shaped fixture, the gripping distance of the hand can be extended, the sight line is avoided from being blocked due to the operation during the clamping process, and the hand is more convenient to exert force, so that the clamping of the short sample 62 is more convenient and labor-saving.
[0036] In this embodiment, the adjustment ring 13 has a driving portion 131 and a restraining portion 132. The driving portion 131 is threadedly engaged with the adjustment rod 11, and the restraining portion 132 is arranged on a side of the driving portion 131 close to the clamping strip 12. As the driving portion 131 approaches the clamping strip 12, the restraining portion 132 is pushed by the driving portion 131 to tighten the grabbing end 122 within the restraining portion 132.
[0037] Specifically, through the knob driving part 131, the constraint part 132 is pushed to move along the axial direction of the adjusting rod 11 to approach or depart from the clamping strip 12. When the knob driving part 131 approaches the clamping strip 12, the constraint part 132 gradually swallows the clamping strip 12. During the process that the constraint part 132 gradually closes the grasping end 122, the grasping end 122 gradually becomes smaller and tightly clamps the short specimen 62. When the driving part 131 departs from the clamping strip 12, it drives the constraint part 132 to withdraw from the grasping end 122, and the grasping end 122 gradually loosens to pick up and place the short specimen 62. The setting of the driving part 131 reserves a distance between the human hand and the constraint part 132, which is more convenient for regulating the constraint part 132.
[0038] In this embodiment, the diameter width of the driving part 131 is greater than that of the constraint part 132.
[0039] Specifically, when manually clamping the short specimen 62, the hand applies force on the driving part 131 to push the constraint part 132. The size of the constraint part 132 is usually selected according to the size of the short specimen 62. Since the short specimen 62 is small in volume itself, and the constraint part 132 is used to clamp the short specimen 62, the size of the constraint part 132 will also be very small, making it inconvenient for manual operation and exerting force. The diameter width of the driving part 131 is larger than that of the constraint part 132, which can provide a starting point for manual operation, facilitate the control of the restraint degree of multiple clamping strips 12, and make the clamping of the short specimen 62 more accurate and smooth.
[0040] Further, the driving part 131 can be a nut with edges and corners, which can provide frictional force during the process of twisting it.
[0041] In this embodiment, the grasping ends 122 of multiple clamping strips 12 are cylindrical when constrained by the adjusting ring 13.
[0042] Specifically, the outside of the cylinder is relatively smooth, and the adjusting ring 13 slides more smoothly outside the clamping strip 12.
[0043] In this embodiment, the grasping ends 122 of multiple clamping strips 12 are tubular when constrained by the adjusting ring 13. The grasping end 122 includes a first grasping section 122a and a second grasping section 122b. The first grasping section 122a is located between the second grasping section 122b and the tightening end 121, and the inner diameter of the second grasping section 122b is greater than that of the first grasping section 122a.
[0044] Specifically, the tubular gripping end 122 has a cavity inside, so that the overall weight of the multiple clamping strips 12 is lighter and stress concentration can be avoided. The inner diameter of the first gripping section 122a can be smaller, and the thickness can be adaptively thickened to ensure strength. The inner diameter of the second gripping section 122b is larger and thinner, so that the short sample 62 of the product 60 can be accommodated. After the short sample 62 extends to a certain length, it is supported by the first gripping section 122a to limit its continued entry. At the same time, it also has a prompting function, that is, when the short sample 62 hits the first gripping section 122a, the hand placed on the adjustment rod 11 or the adjustment ring 13 can feel the blocking feedback, and the adjustment ring 13 can be stopped from advancing toward the gripping end 122.
[0045] In this embodiment, the inner wall of one end of the second grabbing section 122 b away from the first grabbing section 122 a gradually converges inward until the end is sharp, so as to reduce the contact area between the second grabbing section 122 b and the short sample 62 .
[0046] Specifically, the tip of the second gripping section 122 b is pointed and thin, which can adapt to a shorter sample 62 of a smaller size and avoid an excessively large contact area with the shorter sample 62 , which may cause inaccurate clamping or easy falling off.
[0047] The clamp 10 for short and small specimens provided in this embodiment connects a plurality of clamping strips 12 to the end of an adjusting rod 11, and controls the spacing of the plurality of clamping strips 12 through an adjusting ring 13, so that the plurality of clamping strips 12 surround and clamp the short and small specimen 62. The adjusting rod 11 and the adjusting ring 13 increase the control over the clamping strips 12, making it easier to clamp the short and small specimen 62 and control the clamping force.
[0048] Second embodiment
[0049] Please refer to Figures 9-10 Another embodiment of the utility model provides a tensile testing device, including a fixing mechanism 20, a pulling mechanism 20 and a clamp 10 for short and small specimens as described in the first embodiment, wherein the fixing mechanism 20 is used to fix the product 60 so that the clamp 10 for short and small specimens clamps the short and small specimens 62 on the product 60, and the pulling mechanism 20 is connected to an end of the adjusting rod 11 away from the clamping strip 12, and is used to apply tension to the clamp 10 for short and small specimens.
[0050] Specifically, the short sample 62 is first fixed in position on the fixing mechanism 20, and the pulling mechanism 20 then applies a pulling force through the clamp 10 for the short sample, that is, one end of the short sample 62 is forced by the fixing mechanism 20, and the other end is pulled by the pulling mechanism 20, so as to test the tensile strength of the short sample 62.
[0051] In this embodiment, the fixture 10 for short specimens further includes a hanging member 14. The hanging member 14 is provided at one end of the adjusting rod 11 away from the clamping strip 12. The lifting mechanism 20 has a hook member 31, and the hook member 31 is used to connect the hanging member 14 to lift the fixture 10 for short specimens.
[0052] Specifically, the outer diameter of the hanging member 14 is preferably larger than the outer diameter of the adjusting rod 11, and a hanging hole 141 is provided on the side surface of the hanging member 14 for the hook portion 41 to penetrate and connect.
[0053] Furthermore, there is also a connecting member 40. Hook portions 41 are provided at both ends of the connecting member 40. One end hooks the hanging member 14, and the other end hooks the hook member 31 for applying a pulling force. The contour of the connecting member 40 is larger than the contour of the hanging member 14. That is, in the connection from the fixture 10 for short specimens to the hanging member 14 and then to the connecting member 40, the volume of the components increases gradually. The purpose is to ensure that the fixture 10 for short specimens can be applicable to the short specimen 62, and the increase in volume from the hanging member 14 to the connecting member 40 is a transitional process to facilitate the connection of the lifting mechanism 20 and the progressive transmission of force.
[0054] In this embodiment, the fixing mechanism 20 includes a plurality of clamping blocks 21 and a regulator 22. The regulator 22 is used to adjust the distance between the plurality of clamping blocks 21 to fix or release the product 60.
[0055] Specifically, the product 60 has a base 61 and a short specimen 62. The base 61 is clamped between the plurality of clamping blocks 21, and the fixture 10 for the short specimen clamps the short specimen 62. The number of clamping blocks 21 is preferably two. The two clamping blocks 21 are arranged opposite to each other. The regulator 22 drives the distance between the two clamping blocks 21 to increase or narrow, so that the base 61 can be placed between the two clamping blocks 21 or clamped between the two clamping blocks 21.
[0056] In this embodiment, the tensile testing device further includes a base frame 50. The base frame 50 includes a placement table 51 and a long slide plate 52. The length direction of the long slide plate 52 is perpendicular to the placement table 51. The placement table 51 is used to place the fixing mechanism 20. The lifting mechanism 30 is slidably connected to the long slide plate 52. The lifting mechanism 30 can adjust the tensile force on the short specimen 62 as it slides along the long slide plate 52.
[0057] Specifically, when the lifting mechanism 30 slides upward along the long slide plate 52, the tensile force of the lifting mechanism 30 on the fixture 10 for short specimens increases.
[0058] The above are only specific embodiments of the present utility model, but the protection scope of the present utility model is not limited thereto. Any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed by the present utility model should be covered within the protection scope of the present utility model. Therefore, the protection scope of the present utility model shall be subject to the appended claims.
Claims
1. A fixture for short specimens, characterized in that, Comprising: A regulating rod (11); A plurality of clamping bars (12), the plurality of clamping bars (12) having a tightened end (121) adjacent to each other and a dispersible grasping end (122), the tightened end (121) being connected to one end of the regulating rod (11), and the grasping ends (122) of the plurality of clamping bars (12) being used for clamping a short specimen (62); A regulating ring (13), the regulating ring (13) being adjustably sleeved outside the regulating rod (11), and as the regulating ring (13) approaches or departs from the grasping end (122), the regulating ring (13) binds the plurality of clamping bars (12) to clamp the short specimen (62), or loosens the plurality of clamping bars (12) to pick up and place the short specimen (62).
2. The fixture for short specimens according to claim 1, characterized in that, The regulating ring (13) has a driving part (131) and a constraining part (132), the driving part (131) being in threaded cooperation with the regulating rod (11), and the constraining part (132) being arranged on a side of the driving part (131) close to the clamping bar (12). As the driving part (131) approaches the clamping bar (12), the constraining part (132) is pushed by the driving part (131) to tighten the grasping end (122) within the constraining part (132).
3. The fixture for short specimens according to claim 2, characterized in that, The radial width of the driving part (131) is greater than the radial width of the constraining part (132).
4. The fixture for short specimens according to claim 1, characterized in that, The grasping ends (122) of the plurality of clamping bars (12) are cylindrical when bound by the regulating ring (13).
5. The fixture for short specimens according to claim 4, characterized in that, The grasping ends (122) of the plurality of clamping bars (12) are tubular when bound by the regulating ring (13), the grasping end (122) including a first grasping section (122a) and a second grasping section (122b), the first grasping section (122a) being located between the second grasping section (122b) and the tightened end (121), and the inner diameter of the second grasping section (122b) being greater than the inner diameter of the first grasping section (122a).
6. The fixture for short specimens according to claim 5, characterized in that, One end inner wall of the second grasping section (122b) departing from the first grasping section (122a) gradually converges inward until the end is sharp, for reducing the contact area between the second grasping section (122b) and the short specimen (62).
7. A tensile testing device for testing the tensile strength of short specimens, characterized in that, Comprising a fixing mechanism (20), a lifting mechanism (30), and a fixture (10) for short specimens according to any one of claims 1 - 6, the fixing mechanism (20) being used for fixing a product (60) so that the fixture (10) for short specimens clamps a short specimen (62) of the product (60), and the lifting mechanism (30) being connected to an end of the regulating rod (11) departing from the clamping bar (12) for applying a pulling force to the fixture (10) for short specimens.
8. The tensile test device according to claim 7, characterized in that, The fixture (10) for short specimens further includes a hanging member (14), the hanging member (14) being arranged at an end of the regulating rod (11) departing from the clamping bar (12), and the lifting mechanism (30) having a hook member (31), the hook member (31) being used for connecting the hanging member (14) to lift the fixture (10) for short specimens.
9. The tensile testing device according to claim 7, characterized in that, The fixing mechanism (20) includes a plurality of clamping blocks (21) and a regulator (22), and the regulator (22) is used to adjust the spacing of the plurality of clamping blocks (21) to fix or release a short specimen.
10. The tensile testing device according to claim 7, characterized in that, It further includes a base frame (50), the base frame (50) includes a placing table (51) and a long sliding plate (52), the length direction of the long sliding plate (52) is perpendicular to the placing table (51), the placing table (51) is used to place the fixing mechanism (20), and the lifting mechanism (30) is slidably connected to the long sliding plate (52).