Spring plunger

Abstract

The spring plunger comprises a pin column, a spring and a threaded sleeve, the pin column is sequentially sleeved with the spring and the threaded sleeve, one end of the pin column can be connected with a connector, the pin column comprises a pin head, a pin body and a contact end, the pin head, the pin body and the contact end are sequentially arranged from one end to the other end, the contact end can be connected with the connector, and sliding teeth are arranged in the circumferential direction of the surface of the contact end. A first pressing groove is formed between the sliding tooth and the pin body; a prefabricated groove capable of being connected with the pin column is formed in the connector, and a second pressing groove is formed in the bottom of the prefabricated groove; the notch part of the prefabricated groove can be extruded by stress and fills the first pressing groove; the front end of the contact end can be extruded by stress and fills the second pressing groove; the sliding teeth can be in interference fit with the side wall of the prefabricated groove. At least one circle of sliding teeth are arranged in the circumferential direction of the surface of the contact end. Through the mode of combining pressing riveting and expanding riveting, the binding force between the pin column and the connector is improved, and the connection stability is improved.

Description

Technical Field

[0001] The present application relates to the field of fasteners, and in particular to a spring plunger. Background Art

[0002] When the spring plunger is connected to any connecting part, it is usually connected by riveting. When the two are made of the same material, the spring plunger is heat treated, while the connecting part is not heat treated. That is, the hardness of the spring plunger is greater than that of the connecting part. Therefore, when the spring plunger is assembled with the connecting part, the connecting part will undergo plastic deformation at the connecting part of the two, making the connection between the spring plunger and the connecting part tighter.

[0003] However, only using the pressure riveting method to connect the spring plunger and the coupling has insufficient connection stability and weak coupling force, which cannot meet the high load conditions in reality. Summary of the Invention

[0004] The purpose of this application is to provide a spring plunger to solve the problems of insufficient connection stability and weak coupling force between the spring plunger and the coupling member in the prior art.

[0005] A spring plunger comprises a pin, a spring and a threaded sleeve sequentially sleeved on the pin, one end of the pin being connectable to a coupling, the pin comprising a pin head, a pin body and a contact end connectable to the coupling, a sliding tooth being arranged along the circumferential direction of a surface of the contact end, and a first pressure groove being formed between the sliding tooth and the pin body;

[0006] The coupling piece is provided with a prefabricated groove capable of connecting with the pin, and a second pressing groove is provided at the bottom of the prefabricated groove;

[0007] The notch portion of the prefabricated groove can be squeezed and filled with the first pressing groove;

[0008] The front end of the contact end can be squeezed and fill the second pressing groove;

[0009] The sliding teeth can have an interference fit with the side wall of the prefabricated groove;

[0010] The sliding teeth are provided with at least one circle along the circumferential direction of the contact end surface.

[0011] The beneficial effect is that when one end of the pin is connected to the coupling, the coupling can be plastically deformed and fill the first groove by pressure riveting, or plastically deformed and fill the second groove by expansion riveting. The combination of pressure riveting and expansion riveting improves the bonding force between the pin and the coupling, enhances the stability of the connection, makes the spring plunger suitable for stronger loads, and ultimately enhances the market competitiveness of the product. In addition, different numbers of sliding teeth can be selected according to the actual load conditions to meet the actual load requirements.

[0012] In some embodiments, the first compression groove extends along the inner diameter direction of the pin body.

[0013] In some embodiments, the second pressed groove extends along the outer direction of the prefabricated groove.

[0014] In some embodiments, the pin head is configured to have a larger diameter than the pin body.

[0015] In some embodiments, two ends of the spring can abut against the pin head and the threaded sleeve respectively.

[0016] In some embodiments, the threaded sleeve can slide along the pin direction after compressing the spring. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the specific implementation methods of the present application or the technical solutions in the prior art, the following is a brief introduction to the drawings required for use in the specific implementation methods or the description of the prior art. Obviously, the drawings described below are some implementation methods of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0018] Figure 1 This is a structural diagram of the spring plunger and the coupling before assembly.

[0019] Figure 2 This is a schematic diagram of the structure after the spring plunger and the coupling are assembled.

[0020] Figure 3 Schematic diagram of the structure of the spring plunger.

[0021] Figure 4 Schematic diagram of the explosion structure of the spring plunger.

[0022] Description of the reference numerals in the accompanying drawings:

[0023] 1. Pin; 2. Spring; 3. Threaded sleeve; 4. Connector; 11. Pin head; 12. Pin body; 13. Contact end; 14. First press groove; 41. Prefabricated groove; 131. Sliding tooth; 411. Second press groove. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solutions and advantages of this application more clear, the application is further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are part of the embodiments of this application, rather than all of the embodiments, and are only used to explain this application and are not intended to limit this application. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0025] In the description of this application, it should be noted that the terms "center", "upper", "lower", "left", "right", "front", "back", "vertical", "horizontal", "inner", "outer", "two ends", "both sides", "bottom", "top", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the elements referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore cannot be understood as limiting this application. In addition, the terms "first", "second", "superior", "inferior", "primary", "secondary", etc. are used for descriptive purposes only and can be simply used to more clearly distinguish different components, but cannot be understood as indicating or implying relative importance.

[0026] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, integral connections, mechanical connections, electrical connections, direct connections, indirect connections through an intermediate medium, and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this application in specific contexts.

[0027] like Figures 1 to 4 As shown:

[0028] A spring plunger includes a pin 1, a spring 2 and a threaded sleeve 3 sequentially sleeved on the pin 1, one end of the pin 1 being connectable to a coupling 4. The pin 1 includes a pin head 11, a pin body 12, and a contact end 13 that is connectable to the coupling 4, sequentially arranged from one end to the other. A sliding tooth 131 is provided along the circumferential direction of the surface of the contact end 13, and a first pressure groove 14 is provided between the sliding tooth 131 and the pin body 12.

[0029] The coupling member 4 is provided with a prefabricated groove 41 capable of connecting with the pin 1, and a second pressing groove 411 is provided at the bottom of the prefabricated groove 41;

[0030] The notch portion of the prefabricated groove 41 can be squeezed and filled with the first pressing groove 14;

[0031] The front end of the contact end 13 can be squeezed and fill the second pressing groove 411;

[0032] The sliding teeth 131 can be interference fit with the side wall of the prefabricated groove 41;

[0033] The sliding teeth 131 are provided with at least one circle along the circumferential direction of the surface of the contact end 13 .

[0034] When one end of the pin 1 is connected to the coupling 4, either press riveting can cause the coupling 4 to undergo plastic deformation and fill the first compression groove 14; or expansion riveting can be used to cause the contact end 13 to undergo plastic deformation and fill the second compression groove 411. This combination of press riveting and expansion riveting enhances the bonding force between the pin 1 and the coupling 4, improving the stability of the connection, making the spring plunger suitable for stronger loads and ultimately improving the product's market competitiveness. Furthermore, different numbers of sliding teeth 131 can be selected based on the actual load conditions to meet the actual load requirements.

[0035] like Figures 1-2 As shown, preferably, the first pressing groove 14 extends along the inner diameter direction of the pin body 12 .

[0036] like Figures 1-2 As shown, preferably, the second pressing groove 411 extends along the outer direction of the prefabricated groove 41. The shape of the second pressing groove 411 can be arbitrarily selected according to actual conditions.

[0037] like Figure 3 As shown, preferably, the diameter of the pin head 11 is larger than that of the pin body 12 .

[0038] like Figure 3 As shown, preferably, both ends of the spring 2 can abut against the pin head 11 and the threaded sleeve 3 respectively.

[0039] Preferably, the threaded sleeve 3 can slide along the direction of the pin 1 after compressing the spring 2 .

[0040] During the actual connection process between the spring plunger and the coupling 4, press riveting and expansion riveting are carried out simultaneously, that is, the sliding teeth 131 squeeze the coupling 4, causing the coupling 4 to undergo plastic deformation to fill the first pressing groove 14, and the front end of the contact end 13 squeezes the second pressing groove 411, causing the contact end 13 to undergo plastic deformation to fill the second pressing groove 411, ultimately making the spring plunger and the coupling 4 tightly connected.

[0041] The above descriptions are merely some embodiments of the present application and are intended to illustrate the technical solution of the present application, not to limit it. It should be understood that those skilled in the art may make improvements or substitutions based on the above description without departing from the inventive concept of the present application, and all such improvements and substitutions shall fall within the scope of protection of the appended claims of the present application. In such cases, all details may be replaced with equivalent elements, and the materials, shapes, and dimensions may be arbitrary.

Claims

1. A spring plunger comprising a pin (1), a spring (2) and a threaded sleeve (3) sequentially sleeved on the pin (1), one end of the pin (1) being connectable to a coupling (4), characterized in that: The pin (1) comprises a pin head (11), a pin body (12) and a contact end (13) which are sequentially arranged from one end to the other end and can be connected to a coupling member (4); a sliding tooth (131) is arranged along the circumferential direction of the surface of the contact end (13); and a first pressing groove (14) is provided between the sliding tooth (131) and the pin body (12); The coupling member (4) is provided with a prefabricated groove (41) capable of connecting with the pin (1), and a second pressing groove (411) is provided at the bottom of the prefabricated groove (41); The notch portion of the prefabricated groove (41) can be squeezed and filled with the first pressing groove (14); The front end of the contact end (13) can be squeezed and filled with the second pressing groove (411); The sliding teeth (131) can be interference-fitted with the side walls of the prefabricated groove (41); The sliding teeth (131) are provided with at least one circle along the circumferential direction of the surface of the contact end (13).

2. A spring plunger according to claim 1, characterized in that: The first pressing groove (14) extends along the inner diameter direction of the pin body (12).

3. A spring plunger according to claim 1, characterized in that: The second pressing groove (411) extends along the outer direction of the prefabricated groove (41).

4. A spring plunger according to claim 1, characterized in that: The diameter of the pin head (11) is larger than that of the pin body (12).

5. A spring plunger according to claim 1, characterized in that: The two ends of the spring (2) can respectively abut against the pin head (11) and the threaded sleeve (3).

6. A spring plunger according to claim 1, characterized in that: The threaded sleeve (3) can slide along the direction of the pin (1) after squeezing the spring (2).

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