Mechanical fatigue stretching device

Abstract

The utility model discloses a mechanical fatigue stretching device which comprises a rear mounting seat, a first sliding rod, a second sliding rod, a first sliding sleeve, a second sliding sleeve and a sliding seat, wherein the first sliding rod and the second sliding rod are arranged at the end parts of the rear mounting seat in a one-to-one correspondence manner; the first sliding sleeve is sleeved on the first sliding rod in a sliding manner; the second sliding sleeve is sleeved on the second sliding rod in a sliding manner; the longitudinal hand-cranking lead screw assembly is fixed to the center of the rear mounting base in the longitudinal direction, the first clamping head is arranged on the longitudinal hand-cranking lead screw assembly and driven by the longitudinal hand-cranking lead screw assembly to move up and down, and the second clamping head is fixed to the sliding base and opposite to the first clamping head. The first clamping head and the second clamping head are the same in structure, and the first clamping head comprises an upper clamping plate and a lower clamping plate connected with the upper clamping plate through a screw. The end part of a tested sample piece is arranged between the upper clamping plate and the lower clamping plate; the longitudinal hand-cranking lead screw assembly adjusts the longitudinal position of the first clamping head. By means of the scheme, the device has the advantages of being simple in structure, flexible, reliable and the like.

Description

Technical Field

[0001] The utility model relates to the technical field of fatigue testing, in particular to a mechanical fatigue stretching device. Background Art

[0002] The fatigue test of this technology is mainly to test metal (or non-metallic) connectors. At present, the fatigue testing equipment in the prior art is mainly divided into tensile testing and bending testing. Among them, the tensile test is such as the Chinese utility model "Patent Publication No. CN217931087U, named Tensile Fatigue Testing Device for Polymer Material Splines", which clamps the sample by setting a left test spline chuck and a right test spline chuck, and tests it by pulling a reciprocating pull rod. Among them, the left test spline chuck and the right test spline chuck are in the same horizontal direction, and then in the actual application scenario, the tested piece is not completely in the same plane, and it may be stretched in an inclined direction. However, this equipment cannot meet the requirements of inclined tensile testing.

[0003] Therefore, there is an urgent need to propose a mechanical fatigue stretching device with simple structure, flexibility and reliability. Utility Model Content

[0004] In view of the above problems, the purpose of this utility model is to provide a mechanical fatigue stretching device. The technical solution adopted by this utility model is as follows:

[0005] 4. The repairing kit for automotive dents, according to claim 1, wherein a bottom of the foot stand comprises a through-hole, and the two foot pieces comprise two bosses, wherein the bosses comprise a through-hole, a screw bolt, and a nut. The through-hole, the bosses comprise a through-hole, a screw bolt, and a nut. The through-hole, the bosses comprise a through-hole, a screw bolt, and a nut. The through-hole, the bosses comprise a through-hole, a screw bolt. The through-hole

[0006] Furthermore, a first longitudinal slide rail slider assembly and a second longitudinal slide rail slider assembly are provided on both sides of the longitudinal hand screw assembly; a linkage plate is provided between the first clamping head and the longitudinal hand screw assembly; the first longitudinal slide rail slider assembly and the second longitudinal slide rail slider assembly are provided between the rear mounting seat and the linkage plate.

[0007] Furthermore, a plurality of anti-slip strips are provided on the inner sides of the upper and lower clamping plates.

[0008] Furthermore, a first slide bar rear mounting seat and a second slide bar rear mounting seat are provided at the end of the rear mounting seat; the first slide bar is fixed on the first slide bar rear mounting seat; and the second slide bar is fixed on the second slide bar rear mounting seat.

[0009] Furthermore, a first limiting ring and a second limiting ring are fixed on the second sliding rod; and the second sliding sleeve is placed between the first limiting ring and the second limiting ring.

[0010] Furthermore, a travel sensor is fixed on the first sliding rod.

[0011] Furthermore, at least one handle is provided on the slide seat.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] (1) The present invention adjusts the longitudinal position of the first clamping head by providing a longitudinal hand screw assembly, and allows the sample to be arranged at an angle between the first and second clamping heads, making the adjustment convenient and reliable. At the same time, the present invention provides a first longitudinal slide rail assembly, a second longitudinal slide rail assembly, and a linkage plate to achieve longitudinal movement support and ensure adjustment reliability.

[0014] (2) The utility model ensures the reliability of its stretching limit by providing a first sliding sleeve, a second sliding sleeve, a first limit ring and a second limit ring.

[0015] In summary, the utility model has the advantages of simple structure, flexibility and reliability, and has high practical value and promotion value in the field of fatigue testing technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope of protection. For those skilled in the art, other relevant drawings can be obtained based on these drawings without creative work.

[0017] Figure 1 This is a schematic structural diagram of the utility model from a first angle.

[0018] Figure 2 This is a schematic structural diagram of the utility model from a second angle.

[0019] Figure 3 This is a schematic diagram of the structure of the utility model after removing the lower splint.

[0020] In the above drawings, the component names corresponding to the reference numerals are as follows:

[0021] 1. Rear mounting seat; 2. Rear mounting seat for the first slide bar; 3. Rear mounting seat for the second slide bar; 4. First slide bar; 5. First sleeve; 6. Second slide bar; 7. Second sleeve; 8. Slide seat; 9. Longitudinal hand screw assembly; 10. First clamping head; 11. Second clamping head; 12. Test sample; 13. Travel sensor; 14. Handle; 15. First limit ring; 16. Second limit ring; 17. First longitudinal slide rail slider assembly; 18. Second longitudinal slide rail slider assembly; 19. Linkage plate; 101. Upper clamping plate; 102. Lower clamping plate. DETAILED DESCRIPTION

[0022] To make the purpose, technical solutions, and advantages of this application more clear, the present invention is further described below with reference to the accompanying drawings and examples. Implementation methods of this invention include, but are not limited to, the following examples. Based on the examples in this application, all other embodiments obtained by persons of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0023] In this embodiment, the term "and / or" is merely a description of the association relationship between associated objects, indicating that three relationships may exist. For example, A and / or B can represent three situations: A exists alone, A and B exist at the same time, and B exists alone.

[0024] In the description and claims of this embodiment, the terms "first" and "second" are used to distinguish different objects rather than to describe a specific order of objects. For example, a first target object and a second target object are used to distinguish different objects rather than to describe a specific order of objects.

[0025] In the embodiments of this application, words such as "exemplary" or "for example" are used to indicate examples, illustrations, or descriptions. Any embodiment or design described as "exemplary" or "for example" in the embodiments of this application should not be interpreted as being preferred or advantageous over other embodiments or designs. Rather, the use of words such as "exemplary" or "for example" is intended to present the relevant concepts in a concrete manner.

[0026] In the description of the embodiments of this application, unless otherwise specified, "multiple" means two or more. For example, "multiple processing units" means two or more processing units; "multiple systems" means two or more systems.

[0027] like Figures 1 to 3 As shown, this embodiment provides a mechanical fatigue tensile device for performing tensile testing on a sample 12. The device can be connected to a horizontally stretched reciprocating rod to drive a slide 8 to reciprocate along a first slide rod 4 and a second slide rod 6.

[0028] In this embodiment, the mechanical fatigue stretching device includes a rear mounting seat 1, a first slide rod rear mounting seat 2 and a second slide rod rear mounting seat 3 arranged at the end of the rear mounting seat 1, a first slide rod 4 whose rear end is arranged in the first slide rod rear mounting seat 2, a second slide rod 6 whose rear end is arranged in the second slide rod rear mounting seat 3, a first slide sleeve 5 slidably sleeved on the first slide rod 4, a second slide sleeve 7 slidably sleeved on the second slide rod 6, a slide 8 connected to the first slide sleeve 5 and the second slide sleeve 7, a handle 14 arranged on the slide 8, a longitudinal hand screw assembly 9 fixed in the center of the rear mounting seat 1 along the longitudinal direction, a first clamping head 10 arranged on the longitudinal hand screw assembly 9 and driven up and down by the longitudinal hand screw assembly 9, and a second clamping head 11 fixed on the slide 8 and opposite to the first clamping head 10. In this embodiment, the ends of the sample piece 12 to be tested are fixed in the first clamping head 10 and the second clamping head 11 respectively, and the longitudinal position of the first clamping head 10 is adjusted by the longitudinal hand screw assembly 9 so that the sample piece 12 to be tested is arranged at an angle, and the slide 8 can be pulled back and forth.

[0029] In this embodiment, the first clamping head 10 and the second clamping head 11 have the same structure. The first clamping head 10 includes an upper clamping plate 101 and a lower clamping plate 102 connected to the upper clamping plate 101 by screws. In this embodiment, the end of the test specimen 12 is placed between the upper clamping plate 101 and the lower clamping plate 102. To ensure future clamping reliability, several anti-slip strips are installed on the inner sides of the upper clamping plate 101 and the lower clamping plate 102.

[0030] In this embodiment, a first longitudinal slide rail block assembly 17 and a second longitudinal slide rail block assembly 18 are provided on both sides of the longitudinal hand screw assembly 9. In addition, a linkage plate 19 is provided between the first clamping head 10 and the longitudinal hand screw assembly 9. The first longitudinal slide rail block assembly 17 and the second longitudinal slide rail block assembly 18 are provided between the rear mounting base 1 and the linkage plate 19 to provide longitudinal sliding support.

[0031] In this embodiment, a first stop ring 15 and a second stop ring 16 are fixed to the second slide bar 6, with the second sleeve 7 positioned between the first stop ring 15 and the second stop ring 16. During reciprocating movement, the first stop ring 15 and the second stop ring 16 serve as position limits. Furthermore, a travel sensor 13 is fixed to the first slide bar 4 to facilitate measurement of travel distance.

[0032] The above embodiments are only preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Any changes based on the design principles of the present invention and any changes made through non-creative work on this basis shall fall within the scope of protection of the present invention.

Claims

1. A mechanical fatigue stretching device for performing a tensile test on a sample (12) to be tested, characterized in that: The invention comprises a rear mounting seat (1), a first slide bar (4) and a second slide bar (6) arranged at the end of the rear mounting seat (1) in a one-to-one correspondence, a first slide sleeve (5) slidably sleeved on the first slide bar (4), a second slide sleeve (7) slidably sleeved on the second slide bar (6), a slide seat (8) connected to the first slide sleeve (5) and the second slide sleeve (7), a longitudinal hand-crank screw assembly (9) fixed in the center of the rear mounting seat (1) along the longitudinal direction, and a first clamping member arranged on the longitudinal hand-crank screw assembly (9) and driven by the longitudinal hand-crank screw assembly (9) to move up and down. A holding head (10), a second clamping head (11) fixed on a slide (8) and opposite to the first clamping head (10); the first clamping head (10) and the second clamping head (11) have the same structure, and the first clamping head (10) includes an upper clamping plate (101) and a lower clamping plate (102) connected to the upper clamping plate (101) by a screw; the end of the sample piece (12) to be tested is placed between the upper clamping plate (101) and the lower clamping plate (102); the longitudinal hand screw assembly (9) adjusts the longitudinal position of the first clamping head (10).

2. A mechanical fatigue stretching device according to claim 1, characterized in that: A first longitudinal slide block assembly (17) and a second longitudinal slide block assembly (18) are provided on both sides of the longitudinal hand screw assembly (9); a linkage plate (19) is provided between the first clamping head (10) and the longitudinal hand screw assembly (9); and the first longitudinal slide block assembly (17) and the second longitudinal slide block assembly (18) are provided between the rear mounting seat (1) and the linkage plate (19).

3. A mechanical fatigue stretching device according to claim 1 or 2, characterized in that: Several anti-slip strips are provided on the inner sides of the upper clamping plate (101) and the lower clamping plate (102).

4. A mechanical fatigue stretching device according to claim 2, characterized in that: A first slide bar rear mounting seat (2) and a second slide bar rear mounting seat (3) are provided at the end of the rear mounting seat (1); the first slide bar (4) is fixed on the first slide bar rear mounting seat (2); and the second slide bar (6) is fixed on the second slide bar rear mounting seat (3).

5. A mechanical fatigue stretching device according to claim 2 or 4, characterized in that: A first limiting ring (15) and a second limiting ring (16) are fixed on the second sliding rod (6); and the second sliding sleeve (7) is placed between the first limiting ring (15) and the second limiting ring (16).

6. A mechanical fatigue stretching device according to claim 2 or 4, characterized in that: A travel sensor (13) is fixed on the first slide bar (4).

7. A mechanical fatigue stretching device according to claim 2 or 4, characterized in that: At least one handle (14) is provided on the slide seat (8).

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