Fatigue test device for gasket sealing element

Abstract

The invention relates to the technical field of sealing element fatigue testing, in particular to a gasket sealing element fatigue testing device which comprises a driving mechanism, a first transmission mechanism, a second transmission mechanism, an executing mechanism and an elastic mechanism. The first transmission mechanism and the second transmission mechanism are both connected with the driving mechanism; the execution mechanism comprises a first guide rod and a clamp, the first end of the first guide rod is used for being in contact with the first transmission mechanism and / or the second transmission mechanism, and a gap used for clamping a sealing element to be tested is formed between the first guide rod and the clamp; the elastic mechanism is connected with the third end of the first guide rod. According to the gasket sealing element fatigue test device provided by the invention, the driving mechanism is used for providing power for compressing the sealing element, the two transmission mechanisms are used for driving the first guide rod to compress the sealing element on the clamp in turn, and the elastic mechanism is used for driving the first guide rod to rebound, so that fatigue detection of the sealing element is realized; and a dual-power transmission mechanism is adopted, so that the execution efficiency of the execution mechanism is improved.

Description

Technical Field

[0001] The invention relates to the technical field of seal fatigue testing, and in particular to a gasket seal fatigue testing device. Background Art

[0002] The engine is a device that provides power for vehicles such as motorcycles and cars, and determines the power, economy, stability and environmental protection of the car. The oil seepage and leakage caused by the failure of the engine gasket will cause poor engine lubrication and wear of the parts, affecting the life of the engine; the failure of the engine cylinder head gasket will cause gas to leak into the waterway, and the abnormal rise in water temperature will cause boiling, and in severe cases, it will cause boiling accidents. Therefore, the sealing performance of the gasket in the engine is very important.

[0003] The sealing gasket is installed at the joint interface of the cylinder block and cylinder head. The rebound characteristics of the gasket and the skeleton plate and the filling of the surface texture of the joint surface are used to follow the deformation of the cylinder block and cylinder head to achieve reliable sealing. When the engine is working, the structural deformation caused by the installation preload, vibration, temperature, medium pressure, etc. will cause separation between the joint interface of the engine cylinder block and cylinder head. The sealing gasket will produce fatigue damage and performance degradation when working under variable stress conditions for a long time. This is the root cause of leakage in the system. It is very important to carry out gasket fatigue durability tests to test the evolution of mechanical properties and fatigue life of gaskets under fatigue loads. In the prior art, fatigue test devices for seals often have problems such as complex structure, poor test results, and low test efficiency. Summary of the invention

[0004] The invention provides a gasket seal fatigue test device, which is used to solve the defects of the fatigue test device in the prior art, such as complex structure, poor test effect and low test efficiency.

[0005] The present invention provides a gasket seal fatigue test device, comprising: Driving mechanism; The first transmission mechanism and the second transmission mechanism are both connected to the driving mechanism and are both capable of linear reciprocating motion, and there is a phase difference between the first transmission mechanism and the second transmission mechanism; The actuator comprises: a first guide rod and a clamp, wherein the first end of the first guide rod is used to contact the first transmission mechanism and / or the second transmission mechanism, the second end of the first guide rod forms a compression surface, and a gap for clamping the seal to be tested is formed between the compression surface and the clamp; The elastic mechanism is connected to the third end of the first guide rod and is used to provide a restoring force for the actuator.

[0006] According to the gasket seal fatigue test device provided by the present invention, the driving mechanism comprises: a driving motor, a first transmission pulley, a transmission belt, a second transmission pulley and a transmission shaft, the first transmission pulley is sleeved on the output shaft of the driving motor, the first transmission pulley and the second transmission pulley are connected by the transmission belt, and the second transmission pulley is sleeved on the transmission shaft; The transmission shaft is connected to the first transmission mechanism and the second transmission mechanism respectively.

[0007] According to the gasket seal fatigue testing device provided by the present invention, the first transmission mechanism includes: a first eccentric wheel, a first connecting disk and a first connecting rod assembly, the first eccentric wheel is eccentrically connected to the transmission shaft, the first connecting disk is sleeved on the first eccentric wheel and connected to one end of the first connecting rod assembly, and the other end of the first connecting rod assembly can contact the first end of the first guide rod.

[0008] According to the gasket seal fatigue test device provided by the present invention, the first connecting rod assembly comprises: a first connecting rod, a first coupling and a second guide rod connected in sequence, the first connecting rod is connected to the first connecting plate, and the second guide rod can contact the first end of the first guide rod; It also includes: a plurality of first limit blocks which are symmetrically arranged, and the second guide rod can be slidably limited in the first limit blocks which are symmetrically arranged.

[0009] According to the gasket seal fatigue testing device provided by the present invention, the second transmission mechanism includes: a second eccentric wheel, a second connecting plate and a second connecting rod assembly, the second eccentric wheel is eccentrically connected to the transmission shaft, the second connecting plate is sleeved on the second eccentric wheel and connected to one end of the second connecting rod assembly, and the other end of the second connecting rod assembly can contact the first end of the first guide rod.

[0010] According to the gasket seal fatigue test device provided by the present invention, the second connecting rod assembly comprises: a second connecting rod, a second coupling and a third guide rod connected in sequence, the second connecting rod is connected to the second connecting plate, and the third guide rod can contact the first end of the first guide rod; It also includes: a plurality of symmetrically arranged second limit blocks, and the third guide rod can be slidably limited in the symmetrically arranged second limit blocks.

[0011] According to the gasket seal fatigue testing device provided by the present invention, a limiting surface is formed on the fixture, and the limiting surface is used to contact the second end of the first guide rod to limit the first guide rod.

[0012] The gasket seal fatigue test device provided by the present invention also includes: A plurality of third limit blocks are symmetrically arranged, wherein the first end of the first guide rod can be slidably limited in the third limit blocks symmetrically arranged; A plurality of fourth limiting blocks are symmetrically arranged, and the third end of the first guide rod can be slidably limited in the symmetrically arranged fourth limiting blocks.

[0013] According to the gasket seal fatigue testing device provided by the present invention, the elastic mechanism comprises: a spring and a positioning member, the spring is arranged at the third end of the first guide rod and can be in elastic contact with the positioning member.

[0014] According to the gasket seal fatigue testing device provided by the present invention, the positioning member includes: a limiting sleeve and a bolt, the limiting sleeve is formed with an internal thread, the bolt is engaged with the limiting sleeve and is movably arranged in the extension and contraction direction of the spring, and the end of the bolt is used to contact the spring.

[0015] The present invention provides a gasket seal fatigue test device, which includes: a driving mechanism, a first transmission mechanism, a second transmission mechanism, an actuator and an elastic mechanism. The first transmission mechanism and the second transmission mechanism are both connected to the driving mechanism and can perform linear reciprocating motion, and there is a phase difference between the first transmission mechanism and the second transmission mechanism; the actuator includes: a first guide rod and a clamp, the first end of the first guide rod is used to contact the first transmission mechanism and / or the second transmission mechanism, the second end of the first guide rod forms a compression surface, and a gap for clamping the seal to be tested is formed between the compression surface and the clamp; the elastic mechanism is connected to the third end of the first guide rod, and is used to provide a restoring force for the actuator. The present invention provides a gasket seal fatigue test device, which uses a driving mechanism to provide power for compressing the seal, and uses two transmission mechanisms to drive the first guide rod to compress the seal on the clamp in turn, and uses the elastic mechanism to drive the first guide rod to rebound, thereby realizing fatigue detection of the seal; because a dual-power transmission mechanism is used, the execution efficiency of the actuator is improved, meeting the needs of seal fatigue detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 It is an overall schematic diagram of a gasket seal fatigue testing device provided in one embodiment of the present invention.

[0018] Figure 2It is a schematic diagram of the structure of a driving mechanism provided in one embodiment of the present invention.

[0019] Figure 3 It is a structural schematic diagram of a first transmission mechanism provided in one embodiment of the present invention.

[0020] Figure 4 It is a structural schematic diagram of an actuator and an elastic mechanism provided in one embodiment of the present invention.

[0021] Reference numerals: 100: driving mechanism; 200: first transmission mechanism; 300: second transmission mechanism; 400: actuator; 500: elastic mechanism; 1: driving motor; 2: first transmission pulley; 3: transmission belt; 4: second transmission pulley; 5: transmission shaft; 6: first eccentric wheel; 7: first connecting plate; 8: first connecting rod; 9: first coupling; 10: second guide rod; 11: first limit block; 12: first guide rod; 13: clamp; 131: limit surface; 14: third limit block; 15: fourth limit block; 16: spring; 17: limit sleeve; 18: bolt; 19: seal to be tested. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0023] In the description of the present embodiment, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present embodiment and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present embodiment.

[0024] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this embodiment, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0025] In this embodiment, unless otherwise clearly specified and limited, the terms "set", "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in this embodiment can be understood according to specific circumstances.

[0026] In the embodiments of the present invention, unless otherwise clearly specified and limited, the first feature being "above" or "below" the second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0027] Combine the following Figure 1-Figure 4 The present invention describes a gasket seal fatigue test device, which comprises a driving mechanism 100 , a first transmission mechanism 200 , a second transmission mechanism 300 , an actuator 400 and an elastic mechanism 500 .

[0028] Among them, the first transmission mechanism 200 and the second transmission mechanism 300 are both connected to the driving mechanism 100, and both can perform linear reciprocating motion, and there is a phase difference between the first transmission mechanism 200 and the second transmission mechanism 300; the actuator 400 includes: a first guide rod 12 and a clamp 13, the first end of the first guide rod 12 is used to contact the first transmission mechanism 200 and / or the second transmission mechanism 300, the second end of the first guide rod 12 forms a compression surface, and a gap is formed between the compression surface and the clamp 13 for clamping the seal 19 to be tested; the elastic mechanism 500 is connected to the third end of the first guide rod 12, and is used to provide a restoring force for the actuator 400.

[0029] Specifically, the driving mechanism 100 provides the driving force for compressing the seal for the entire device, and can adopt the driving motor 1. The driving motor 1 drives the first transmission mechanism 200 and the second transmission mechanism 300 to move at the same time, but there is a phase difference between the first transmission mechanism 200 and the second transmission mechanism 300. Therefore, driven by the driving motor 1, when the first transmission mechanism 200 is in an extended state, the second transmission mechanism 300 is in a retracted state; conversely, when the second transmission mechanism 300 is in an extended state, the first transmission mechanism 200 is in a retracted state.

[0030] The first transmission mechanism 200 and the second transmission mechanism 300 move in turn to move the first guide rod 12 of the actuator 400, and the gap between the compression surface and the fixture 13 is reduced, so that the seal between the compression surface and the fixture 13 is reciprocated and compressed, and the fatigue test of the seal is performed. When the first transmission mechanism 200 or the second transmission mechanism 300 is retracted, the elastic mechanism 500 provides a restoring force for the first guide rod 12, the gap between the compression surface and the fixture 13 is increased, and the seal is released, so that the seal can be periodically fatigued.

[0031] Preferably, the first guide rod 12 is composed of three connected parts, namely, the first end, the second end and the third end. The first end and the second end are both columnar structures for transmitting displacement, and the second end is a truncated cone structure, which can form a gap with the clamp 13. The size of the gap can be adjusted by moving the first guide rod 12, and the seal is placed in the gap for fatigue detection.

[0032] The present invention provides a gasket seal fatigue test device, which includes: a driving mechanism 100, a first transmission mechanism 200, a second transmission mechanism 300, an actuator 400 and an elastic mechanism 500. The first transmission mechanism 200 and the second transmission mechanism 300 are both connected to the driving mechanism 100, and both can perform linear reciprocating motion, and there is a phase difference between the first transmission mechanism 200 and the second transmission mechanism 300; the actuator 400 includes: a first guide rod 12 and a clamp 13, the first end of the first guide rod 12 is used to contact the first transmission mechanism 200 and / or the second transmission mechanism 300, the second end of the first guide rod 12 forms a compression surface, and a gap for clamping the seal 19 to be tested is formed between the compression surface and the clamp 13; the elastic mechanism 500 is connected to the third end of the first guide rod 12, and is used to provide a restoring force for the actuator 400. The present invention provides a gasket seal fatigue test device, which utilizes a driving mechanism 100 to provide power for compressing a seal, and uses two transmission mechanisms to drive a first guide rod 12 in turn to compress the seal on a fixture 13, and utilizes an elastic mechanism 500 to drive the first guide rod 12 to rebound, thereby realizing fatigue detection of the seal; since a dual-power transmission mechanism is used, the execution efficiency of the actuator 400 is improved, thereby meeting the needs of seal fatigue detection.

[0033] In one embodiment of the present invention, the driving mechanism 100 includes: a driving motor 1, a first transmission pulley 2, a transmission belt 3, a second transmission pulley 4 and a transmission shaft 5, wherein the first transmission pulley 2 is sleeved on the output shaft of the driving motor 1, the first transmission pulley 2 and the second transmission pulley 4 are connected by the transmission belt 3, and the second transmission pulley 4 is sleeved on the transmission shaft 5; the transmission shaft 5 is respectively connected to the first transmission mechanism 200 and the second transmission mechanism 300. In this embodiment, the driving motor 1 is used as a power source, the first transmission pulley 2 is coaxially connected to the output shaft of the driving motor 1, and the transmission belt 3 is driven to move through the first transmission pulley 2, thereby driving the second transmission pulley 4 to rotate, and the second transmission pulley 4 is coaxially connected to the transmission shaft 5, driving the transmission shaft 5 to rotate; two transmission mechanisms are connected to the transmission shaft 5, and the two transmission mechanisms are driven to move at the same time, namely, the first transmission mechanism 200 and the second transmission mechanism 300. In this embodiment, a power source is used, which can drive the first transmission mechanism 200 and the second transmission mechanism 300 to move at the same time.

[0034] In one embodiment of the present invention, the first transmission mechanism 200 includes: a first eccentric wheel 6, a first connecting plate 7 and a first connecting rod assembly, the first eccentric wheel 6 is eccentrically connected to the transmission shaft 5, the first connecting plate 7 is sleeved on the first eccentric wheel 6 and connected to one end of the first connecting rod assembly, and the other end of the first connecting rod assembly can contact the first end of the first guide rod 12. In this embodiment, the first transmission mechanism 200 adopts a structure composed of an eccentric wheel and a connecting rod assembly, and the eccentric wheel and the connecting rod assembly are connected by a connecting plate. The above structure is used to convert the rotational motion of the transmission shaft 5 into a linear reciprocating motion of the first connecting rod assembly, and then drive the first guide rod 12 to perform a linear reciprocating motion, thereby periodically squeezing the seal.

[0035] In one embodiment of the present invention, the first connecting rod assembly includes: a first connecting rod 8, a first coupling 9 and a second guide rod 10 connected in sequence, the first connecting rod 8 is connected to the first connecting plate 7, and the second guide rod 10 can contact the first end of the first guide rod 12. The gasket seal fatigue test device also includes: a plurality of symmetrically arranged first limit blocks 11, and the second guide rod 10 can be slidably limited in the symmetrically arranged first limit blocks 11. In this embodiment, the first connecting rod assembly is composed of the first connecting rod 8, the first coupling 9 and the second guide rod 10, and the first coupling 9 is used to transmit the movement of the first connecting rod 8 to the second guide rod 10. Under the limiting action of the first limit block 11, the second guide rod 10 moves in the horizontal direction so that it can contact the first guide rod 12.

[0036] In one embodiment of the present invention, the second transmission mechanism 300 includes: a second eccentric wheel, a second connecting plate and a second connecting rod assembly, the second eccentric wheel is eccentrically connected to the transmission shaft 5, the second connecting plate is sleeved on the second eccentric wheel and connected to one end of the second connecting rod assembly, and the other end of the second connecting rod assembly can contact the first end of the first guide rod 12. In this embodiment, the second transmission mechanism 300 has the same structure as the first transmission mechanism 200, and will not be repeated here.

[0037] In one embodiment of the present invention, the second connecting rod assembly includes: a second connecting rod, a second coupling and a third guide rod connected in sequence, the second connecting rod is connected to the second connecting plate, and the third guide rod can contact the first end of the first guide rod 12; the gasket seal fatigue test device also includes: a plurality of symmetrically arranged second limit blocks, and the third guide rod can be slidably limited in the symmetrically arranged second limit blocks. In this embodiment, the second connecting rod assembly has the same structure as the first connecting rod assembly, and will not be repeated here.

[0038] In one embodiment of the present invention, a limiting surface 131 is formed on the clamp 13, and the limiting surface 131 is used to contact the second end of the first guide rod 12 to limit the first guide rod 12. Specifically, the limiting surface 131 on the clamp 13 is an annular protrusion, which can contact the surface of the second end of the first guide rod 12 on the opposite side of the compression surface, thereby limiting the movement of the first guide rod 12. Figure 1 In the structure shown, the limiting surface 131 can contact the left side surface of the first guide rod 12, and the limiting surface 131 of the clamp 13 can contact the right side surface of the guide rod.

[0039] In one embodiment of the present invention, the gasket seal fatigue test device further includes: a plurality of symmetrically arranged third limit blocks 14 and a plurality of symmetrically arranged fourth limit blocks 15. The first end of the first guide rod 12 can be slidably limited in the symmetrically arranged third limit blocks 14; the third end of the first guide rod 12 can be slidably limited in the symmetrically arranged fourth limit blocks 15. The movement of the first end and the third end of the first guide rod 12 is limited by the third limit blocks 14 and the fourth limit blocks 15.

[0040] In one embodiment of the present invention, the elastic mechanism 500 includes: a spring 16 and a positioning member, the spring 16 is arranged at the third end of the first guide rod 12, and can be in elastic contact with the positioning member. Specifically, the positioning member is fixed, one end of the spring 16 is fixed to the third end of the first guide rod 12, and the other end is a free end. When the first guide rod 12 is driven by the first transmission mechanism 200 or the second transmission mechanism 300 and moves toward the positioning member, the spring 16 is compressed, and at the same time, the sealing member is compressed; when the first guide rod 12 is driven by the first transmission mechanism 200 or the second transmission mechanism 300 and moves away from the positioning member, the spring 16 rebounds and stretches, and at the same time, the sealing member is released. By repeating the above operation, the fatigue performance of the sealing member can be tested.

[0041] In one embodiment of the present invention, the positioning member includes: a limiting sleeve 17 and a bolt 18, the limiting sleeve 17 is formed with an internal thread, the bolt 18 is engaged with the limiting sleeve 17 and is movably arranged in the extension and contraction direction of the spring 16, and the end of the bolt 18 is used to contact the spring 16. In this embodiment, by rotating the bolt 18, the bolt 18 can be rotated in the limiting sleeve 17 and perform a telescopic movement, so that the distance between the bolt 18 and the spring 16 can be adjusted, thereby adjusting the compression degree of the sealing gasket.

[0042] The device embodiments described above are merely illustrative, wherein the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, i.e., they may be located in one place, or they may be distributed over multiple units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the present embodiment. Those of ordinary skill in the art may understand and implement the present invention without creative effort.

[0043] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A gasket seal fatigue test device, characterized in that: include: A driving mechanism (100); The first transmission mechanism (200) and the second transmission mechanism (300) are both connected to the driving mechanism (100) and are both capable of linear reciprocating motion, and there is a phase difference between the first transmission mechanism (200) and the second transmission mechanism (300); An actuator (400) comprises: a first guide rod (12) and a clamp (13), wherein a first end of the first guide rod (12) is used to contact the first transmission mechanism (200) and / or the second transmission mechanism (300), a second end of the first guide rod (12) forms a compression surface, and a gap is formed between the compression surface and the clamp (13) for clamping a seal (19) to be tested; An elastic mechanism (500) is connected to the third end of the first guide rod (12) and is used to provide a restoring force for the actuator (400).

2. The gasket seal fatigue testing device according to claim 1, characterized in that: The driving mechanism (100) comprises: a driving motor (1), a first transmission pulley (2), a transmission belt (3), a second transmission pulley (4) and a transmission shaft (5), wherein the first transmission pulley (2) is sleeved on the output shaft of the driving motor (1), the first transmission pulley (2) and the second transmission pulley (4) are connected in transmission via the transmission belt (3), and the second transmission pulley (4) is sleeved on the transmission shaft (5); The transmission shaft (5) is connected to the first transmission mechanism (200) and the second transmission mechanism (300) respectively.

3. The gasket seal fatigue testing device according to claim 2, characterized in that: The first transmission mechanism (200) comprises: a first eccentric wheel (6), a first connecting plate (7) and a first connecting rod assembly, wherein the first eccentric wheel (6) is eccentrically connected to the transmission shaft (5), the first connecting plate (7) is sleeved on the first eccentric wheel (6) and connected to one end of the first connecting rod assembly, and the other end of the first connecting rod assembly is capable of contacting the first end of the first guide rod (12).

4. The gasket seal fatigue testing device according to claim 3, characterized in that: The first connecting rod assembly comprises: a first connecting rod (8), a first coupling (9) and a second guide rod (10) connected in sequence, the first connecting rod (8) being connected to the first connecting plate (7), and the second guide rod (10) being capable of contacting a first end of the first guide rod (12); It also comprises: a plurality of symmetrically arranged first limit blocks (11), wherein the second guide rod (10) can be slidably limited in the symmetrically arranged first limit blocks (11).

5. The gasket seal fatigue testing device according to claim 2, characterized in that: The second transmission mechanism (300) comprises: a second eccentric wheel, a second connecting disk and a second connecting rod assembly, the second eccentric wheel being eccentrically connected to the transmission shaft (5), the second connecting disk being sleeved on the second eccentric wheel and connected to one end of the second connecting rod assembly, and the other end of the second connecting rod assembly being capable of contacting the first end of the first guide rod (12).

6. The gasket seal fatigue testing device according to claim 5, characterized in that: The second connecting rod assembly comprises: a second connecting rod, a second coupling and a third guide rod connected in sequence, the second connecting rod is connected to the second connecting plate, and the third guide rod is capable of contacting the first end of the first guide rod (12); It also includes: a plurality of symmetrically arranged second limit blocks, and the third guide rod can be slidably limited in the symmetrically arranged second limit blocks.

7. The gasket seal fatigue testing device according to any one of claims 1 to 6, characterized in that: A limiting surface (131) is formed on the clamp (13), and the limiting surface (131) is used to contact the second end of the first guide rod (12) to limit the position of the first guide rod (12).

8. The gasket seal fatigue testing device according to any one of claims 1 to 6, characterized in that: Also includes: a plurality of symmetrically arranged third limit blocks (14), wherein the first end of the first guide rod (12) can be slidably limited in the symmetrically arranged third limit blocks (14); A plurality of symmetrically arranged fourth limit blocks (15), wherein the third end of the first guide rod (12) can be slidably limited in the symmetrically arranged fourth limit blocks (15).

9. The gasket seal fatigue testing device according to any one of claims 1 to 6, characterized in that: The elastic mechanism (500) comprises a spring (16) and a positioning member, wherein the spring (16) is arranged at the third end of the first guide rod (12) and is capable of elastically contacting the positioning member.

10. The gasket seal fatigue testing device according to claim 9, characterized in that: The positioning member comprises: a limiting sleeve (17) and a bolt (18); the limiting sleeve (17) is formed with an internal thread; the bolt (18) engages with the limiting sleeve (17) and is movably arranged in the extension and contraction direction of the spring (16); and an end of the bolt (18) is used to contact the spring (16).

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