Rubber tensile stress relaxation detection tool

Abstract

The utility model relates to a rubber tensile stress relaxation detection tool, which relates to the technical field of tools, and comprises an upper fixed plate, a lower fixed plate, a lower clamping plate and an upper clamping plate, the lower fixed plate is arranged below the upper fixed plate, the upper fixed plate and the lower fixed plate are relatively fixed through a connecting rod, the lower clamping plate is arranged between the upper fixed plate and the lower fixed plate and is relatively fixed with the connecting rod, and the upper clamping plate is arranged on the lower fixed plate. And the upper clamping plate is arranged above the upper fixed plate and is in sliding connection with the upper fixed plate. The rubber tensile stress relaxation detection tool disclosed by the utility model can be matched with a tensile testing machine to complete a tensile test on a workpiece.

Description

Technical Field

[0001] The utility model relates to a detection tool, in particular to a rubber tensile stress relaxation detection tool. Background Art

[0002] Generally, skeleton seals are made of rubber, skeletons and springs. Based on the installation form of skeleton seals, the outer diameter rubber of the seal is in a compressed state, while the main lip of the seal is in a stretched state. Regardless of whether the oil seal is in a compressed state or a stretched state, the rubber is deformed and stress is generated. However, under the action of heat and oil, the stress of rubber gradually decays over time due to physical degradation and chemical aging. As a sealing rubber material, the smaller the stress relaxation decay, the better, and the greater the force retention, the better. Therefore, how to accurately and quickly test the compression stress relaxation and tensile stress relaxation of rubber is particularly important for the evaluation of oil seal materials.

[0003] The Chinese utility model patent with publication number CN220289227U is entitled a rubber specimen tension and compression dual-purpose permanent deformation test fixture. Although the device can perform tensile tests on specimens, the device is not suitable for tensile testing machines.

[0004] Based on this, it is necessary to improve the existing tooling. Utility Model Content

[0005] Technical purpose: In order to overcome the deficiencies in the prior art, the utility model provides a rubber tensile stress relaxation detection tooling to adapt to a tensile testing machine.

[0006] Technical solution: To achieve the above purpose, the utility model discloses a rubber tensile stress relaxation detection tool, comprising:

[0007] Upper fixed board;

[0008] A lower fixing plate, the lower fixing plate is arranged below the upper fixing plate, and the upper fixing plate and the lower fixing plate are relatively fixed by a connecting rod;

[0009] A lower clamping plate, which is disposed between the upper fixed plate and the lower fixed plate and is relatively fixed to the connecting rod;

[0010] An upper clamping plate is arranged above the upper fixed plate and is slidably connected with the upper fixed plate.

[0011] Preferably, the lower clamping plate includes a first plate body and a second plate body, the first plate body is provided with a groove for accommodating the second plate body, the first plate body and the second plate body are relatively fixed by fasteners, and one end of the workpiece to be measured is clamped and fixed by the first plate body and the second plate body.

[0012] Preferably, the first plate is connected with a set screw for being press-connected with the connecting rod.

[0013] Preferably, the upper clamping plate comprises a third plate body and a fourth plate body connected by fasteners, and the other end of the workpiece to be measured is clamped and fixed by the third plate body and the fourth plate body.

[0014] Preferably, the third plate body includes a first plate portion and a second plate portion, the second plate portion is fixed to the fourth plate body by fasteners; the upper fixed plate is provided with a guide groove for accommodating the second plate portion and the fourth plate body; the cross-section of the first plate portion is larger than the cross-section of the guide groove.

[0015] Preferably, the lower fixing plate and the upper clamping plate are respectively connected with flanges.

[0016] The utility model discloses a rubber tensile stress relaxation detection tool, which has the following beneficial effects:

[0017] (1) The tooling can independently test the workpiece. By moving the lower clamp downward, the workpiece can be stretched for a long time to measure its tensile stress relaxation.

[0018] (2) The tooling is adapted to a tensile testing machine, and the flanges of the lower fixing plate and the upper clamping plate are fixed to the tensile testing machine. Under the action of the tensile testing machine, the upper clamping plate moves upward to test the tensile resistance of the workpiece.

[0019] (3) The tooling and the workpiece to be tested can be placed in an aging test chamber to carry out an aging test. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the structure of the utility model;

[0021] Figure 2 It is a schematic diagram of the structure after the upper clamping plate is separated from the upper fixed plate.

[0022] In the figure, 1, upper fixing plate; 2, lower fixing plate; 3, connecting rod; 4, lower clamping plate; 5, upper clamping plate; 6, first plate body; 7, second plate body; 8, workpiece to be measured; 9, fastener; 10, set screw; 11, third plate body; 12, fourth plate body; 13, first plate part; 14, second plate part; 15, guide groove; 16, flange. DETAILED DESCRIPTION

[0023] The following is combined with Figure 1 To Attachment Figure 2 The principles and features of the present invention are described, and the examples given are only used to explain the present invention, and are not used to limit the scope of the present invention.

[0024] A rubber tensile stress relaxation detection tool comprises an upper fixing plate 1, a lower fixing plate 2, a lower clamping plate 4 and an upper clamping plate 5.

[0025] The upper fixed plate 1 and the lower fixed plate 2 are arranged at intervals, and the lower fixed plate 2 is arranged below the upper fixed plate 1. Two symmetrically distributed connecting rods 3 are arranged between the upper fixed plate 1 and the lower fixed plate 2, the bottom end of the connecting rod 3 is connected to the lower fixed plate 2, and the top end of the connecting rod 3 is connected to the upper fixed plate 1, and the upper fixed plate 1 and the lower fixed plate 2 are relatively fixed by the connecting rod 3. The lower clamping plate 4 is arranged between the upper fixed plate 1 and the lower fixed plate 2, and the connecting rod 3 passes through the lower clamping plate 4. The lower clamping plate 4 forms a sliding connection with the connecting rod 3 and can be relatively fixed with the connecting rod 3. The upper clamping plate 5 is arranged above the upper fixed plate 1 and is slidably connected to the upper fixed plate 1. The upper fixed plate 1 forms a limit for the upper clamping plate 5 to slide downward.

[0026] The lower clamping plate 4 includes a first plate body 6 and a second plate body 7. The first plate body 6 is provided with a groove for accommodating the second plate body 7. The first plate body 6 and the second plate body 7 are relatively fixed by fasteners 9 (bolts). The workpiece 8 to be measured is made into an "I" shape, and one end of the workpiece 8 to be measured extends between the first plate body 6 and the second plate body 7 and is clamped by the first plate body 6 and the second plate body 7.

[0027] Set screws 10 are arranged on both sides of the first plate body 6. When the set screws 10 are loosened, the first plate body 6 can move up and down along the connecting rod 3; when the set screws 10 are tightened, the first plate body 6 and the connecting rod 3 are relatively fixed.

[0028] The upper clamping plate 5 includes a third plate body 11 and a fourth plate body 12 connected by fasteners 9 (bolts). The other end of the workpiece 8 to be measured extends between the third plate body 11 and the fourth plate body 12, and is clamped and fixed by the third plate body 11 and the fourth plate body 12. Specifically, the third plate body 11 includes a first plate portion 13 and a second plate portion 14, and the second plate portion 14 is relatively fixed to the fourth plate body 12 by fasteners 9 (bolts). The upper fixed plate 1 is provided with a guide groove 15 for accommodating the second plate portion 14 and the fourth plate body 12, and the cross-section of the first plate portion 13 is larger than the cross-section of the guide groove 15. Based on this, the first plate portion 13 cooperates with the upper fixed plate 1 to form a limit for the upper clamping plate 5 to slide downward.

[0029] Flanges 16 are connected to the lower fixing plate 2 and the upper clamping plate 5 respectively, and the lower fixing plate 2 and the upper clamping plate 5 can be fixed on the tensile testing machine respectively through the flanges 16.

[0030] The method of using this device is:

[0031] (1) When testing the tensile stress relaxation of the workpiece 8 to be tested, the two ends of the workpiece are fixedly connected to the upper clamping plate 5 and the lower clamping plate 4 respectively, and then the set screws 10 are loosened and moved downward, and the lower clamping plate 4 makes the workpiece in a tensile state to perform a stress relaxation test. When dealing with stress relaxation tests under different temperature environments, the tooling and the workpiece 8 to be tested can be placed in the aging box.

[0032] (2) When used to test the tensile strength of the workpiece 8 to be tested, the two ends of the workpiece are fixed on the upper clamping plate 5 and the lower clamping plate 4 respectively, and then the flanges 16 of the lower clamping plate 2 and the upper clamping plate 5 are fixed on the tensile testing machine respectively for tensile testing.

[0033] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A rubber tensile stress relaxation detection tool, characterized in that: include: Upper fixing plate (1); A lower fixed plate (2), wherein the lower fixed plate (2) is arranged below the upper fixed plate (1), and the upper fixed plate (1) and the lower fixed plate (2) are relatively fixed via a connecting rod (3); A lower clamping plate (4), wherein the lower clamping plate (4) is arranged between the upper fixed plate (1) and the lower fixed plate (2), and is relatively fixed to the connecting rod (3); An upper clamping plate (5) is arranged above the upper fixed plate (1) and is slidably connected to the upper fixed plate (1).

2. The rubber tensile stress relaxation detection tool according to claim 1, characterized in that: The lower clamping plate (4) comprises a first plate body (6) and a second plate body (7); the first plate body (6) is provided with a groove for accommodating the second plate body (7); the first plate body (6) and the second plate body (7) are relatively fixed by a fastener (9); and one end of the workpiece (8) to be measured is clamped and fixed by the first plate body (6) and the second plate body (7).

3. The rubber tensile stress relaxation detection tool according to claim 2, characterized in that: The first plate body (6) is connected with a set screw (10) for being pressed and connected to the connecting rod (3).

4. The rubber tensile stress relaxation detection tool according to claim 1, characterized in that: The upper clamping plate (5) comprises a third plate body (11) and a fourth plate body (12) connected by a fastener (9), and the other end of the workpiece (8) to be measured is clamped and fixed by the third plate body (11) and the fourth plate body (12).

5. The rubber tensile stress relaxation detection tool according to claim 4, characterized in that: The third plate body (11) comprises a first plate portion (13) and a second plate portion (14), wherein the second plate portion (14) is fixed to the fourth plate body (12) via a fastener (9); the upper fixed plate (1) is provided with a guide groove (15) for accommodating the second plate portion (14) and the fourth plate body (12); and the cross section of the first plate portion (13) is larger than the cross section of the guide groove (15).

6. The rubber tensile stress relaxation detection tool according to claim 1, characterized in that: The lower fixing plate (2) and the upper clamping plate (5) are respectively connected with flanges (16).

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