Traction pin

Abstract

The utility model belongs to the technical field of connecting pieces, and particularly discloses a traction pin. The traction pin is connected between an upper traction plate and a lower traction plate and comprises an end cover and a pin body, the end cover is in interference connection with the pin body, and damping rings are arranged at the connecting position of the pin body and the upper traction plate and the connecting position of the pin body and the lower traction plate. According to the traction pin, the end cover and the pin body are of the split structure and are in interference connection, and compared with an integrated structure of an end cover and a pin body in the prior art, the traction pin of the split structure saves more materials; and on the other hand, the damping ring is arranged at the joint of the pin body and the traction plate, the noise problem caused by a large gap between the pin body and the traction plate in the prior art can be solved, meanwhile, the traction pin provided by the utility model cancels an original handle structure, materials are saved, and the noise problem caused by a handle is also avoided.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of connecting pieces, and particularly relates to a draw pin. BACKGROUND

[0002] The draw pin is a commonly used connecting piece for connecting or dragging two devices or tools. For example, in the field of loaders, the tail of a loader is usually provided with a draw pin for connecting a trailer, other mechanical devices or accessories. By using the draw pin, the loader can drag various tools and devices, thereby expanding its functions. In the prior art, the pin body and the end cover of the draw pin are usually an integrated whole structure, which is relatively wasteful of materials. When installed, there is a large gap between the draw pin and the installation hole, and the collision between the two during vehicle movement can easily produce a large amount of noise. On the other hand, the handle is installed on the end cover of the draw pin, which also produces a large amount of noise. At the same time, since the safety pin is arranged at the middle part of the pin body, the strength of the whole draw pin is weakened.

[0003] Therefore, it is necessary to provide a new type of draw pin to solve the problems of large noise and weak strength caused by the structural defects of the draw pin in the prior art. CONTENT OF THE INVENTION

[0004] In order to solve the problems of large noise and weak strength caused by the structural defects of the draw pin in the prior art, the application provides a new type of draw pin connected between an upper draw plate and a lower draw plate, which comprises an end cover and a pin body. The end cover and the pin body are connected in interference. The connection parts of the pin body and the upper draw plate and the lower draw plate are provided with damping rings.

[0005] In an embodiment, the end cover is provided with a connecting port which is suitable for interference connection with the pin body.

[0006] In an embodiment, the pin body comprises a rod body and an end body which are an integrated structure. The rod body is connected between the upper draw plate and the lower draw plate, and the end body is connected with the end cover in interference.

[0007] In an embodiment, the shaft diameter of the rod body is greater than the shaft diameter of the end body, and the size of the end body is suitable for interference connection with the connecting port.

[0008] In an embodiment, the damping ring is sleeved on the surface of the rod body and is detachably connected with the rod body.

[0009] In an embodiment, the end cover is further provided with a slot which penetrates through the lower surface of the end cover close to the upper draw plate.

[0010] In an embodiment, the number of the slots is two, and the two slots are symmetrical on the same axis.

[0011] In an embodiment, the draw pin further comprises a safety pin, the pin body is provided with a through hole, and the safety pin is arranged in the through hole.

[0012] In an embodiment, the through hole is arranged at an end of the pin body close to the lower draw plate.

[0013] In an embodiment, the pin body is a metal solid structure.

[0014] The draw pin provided by the present application is of a split structure of the end cover and the pin body, and the two are connected in interference. Compared with the integrated structure of the end cover and the pin body in the prior art, the draw pin of the split structure saves more materials. On the other hand, the connection part of the pin body and the draw plate is provided with a damping ring, which can solve the noise problem caused by the large gap between the pin body and the draw plate in the prior art. Meanwhile, the draw pin provided by the present application cancels the original handle structure, which saves materials and avoids the noise problem caused by the handle. BRIEF DESCRIPTION OF DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor on the basis of the drawings shown.

[0016] Figure 1 It is a schematic view of the draw pin structure in the prior art.

[0017] Figure 2 It is a schematic view of the draw pin structure provided by the present application.

[0018] Figure 3 It is a schematic view of the pin body structure of the draw pin provided by the present application.

[0019] Explanation of reference signs:

[0020] The implementation, functional features and advantages of the present application will be further described with reference to the embodiments and the drawings.

[0021] 1-end cover, 11-groove, 2-upper draw plate, 3-safety pin, 4-lower draw plate, 5-pin body, 51-end body, 52-rod body, 6-damping ring. DETAILED DESCRIPTION

[0022] With reference to the drawings of the embodiments of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described. Obviously, the described embodiments are only part of the embodiments of the present application, but not all the embodiments of the present application. Based on the embodiments of the present application, all the other embodiments obtained by a person of ordinary skill in the art without creative work are within the scope of protection of the present application.

[0023] It should be noted that all the direction indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present application are only used to explain the relative position relationship, movement condition, etc. between components in a certain specific posture (as shown in the drawings), and if the specific posture changes, the direction indications also change accordingly.

[0024] In addition, the descriptions such as “first”, “second” and the like in the present application are only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features defined as “first”, “second” can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of “plurality” is at least two groups, for example, two groups, three, etc., unless otherwise specifically limited.

[0025] In the present application, unless otherwise specifically defined and limited, the terms “connection”, “fixation” and the like should be understood in a broad sense, for example, “connection” can be fixed connection, or detachable connection, or integral; can be mechanical connection, or electrical connection; can be direct connection, or indirect connection through an intermediate medium; can be the internal connection of two groups of elements or the interaction relationship between two groups of elements, unless otherwise specifically limited. For a person of ordinary skill in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0026] In addition, the technical solutions of each embodiment of the present application can be combined with each other, but it must be based on the fact that a person of ordinary skill in the art can realize it, and when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, and is not within the scope of protection claimed by the present application.

[0027] Please refer to Figure 1, the prior art, as a common connector, often used in the loader field, for connecting trailers, other mechanical equipment or accessories. The existing hitch pin structure usually includes handle, end cover, pin body and safety pin, handle is set on the end cover to facilitate the use of hitch pin, end cover and pin body are usually integrated structure, pin body middle section is provided with a hole for installing safety pin, the overall structure of hitch pin is simple, so it also brings a lot of problems, such as noise problem caused by handle, strength weakening problem caused by pin body middle section hole, noise problem caused by collision between hitch pin and hitch plate in the gap and so on.

[0028] To solve the above problems in the prior art, the present application provides a new type of hitch pin, please refer to Figure 2 And Figure 3 , the present application provides a hitch pin, connected between the upper hitch plate and the lower hitch plate, including end cover and pin body, the end cover and the pin body are interference connected, the connection between the pin body and the upper hitch plate and the lower hitch plate is provided with a damping ring.

[0029] The present application provides a hitch pin, which cancels the original integrated structure, and the end cover and the pin body of the hitch pin are separately provided, and the two are interference connected. Compared with the original integrated structure of the hitch pin, at least part of the material is saved. Further, the present application provides a damping ring, which is provided between the pin body and the connection between the upper hitch plate and the lower hitch plate. In normal use, the damping ring can fill the installation gap between the hitch pin and the hitch plate, prevent the hitch pin from shaking in the installation hole of the hitch plate and produce noise, and the damping ring also has a buffering effect, which protects the hitch pin. Specifically, the material of the damping ring is not limited, as long as it has the above-mentioned damping and buffering effect, such as rubber, polyethylene foam, glass fiber, carbon fiber, etc.

[0030] In an embodiment, the end cover is provided with a connecting port, which is suitable for interference connection with the pin body. It can be understood that the connecting port must be provided on the side of the end cover facing the pin body, and the size and shape of the connecting port are suitable for interference connection with the pin body, without specific limitation. In this way, during assembly, only the end cover and the pin body need to be connected and assembled as a whole, and the assembly work is simple. As another optional embodiment, the connecting port can also be provided on the pin body, specifically, on the end close to the end cover, and another connecting structure is correspondingly provided on the end cover, so that the interference connection between the end cover and the pin body can be realized.

[0031] Please refer to Figure 3 , in an embodiment, the pin body includes a rod body and an end body, the rod body and the end body are integrated structure, the rod body is connected between the upper hitch plate and the lower hitch plate, and the end body is interference connected with the end cover.

[0032] In the embodiment, the rod body and the end body of the pin body are integrated, the overall strength is high, and the durability is good. Of course, the rod body and the end body can also be a split structure, as long as the normal function of the pin body can be realized, and therefore no limitation is made herein. In the embodiment, the rod body is connected to the traction plate, and the end body is connected to the end cover to realize the connection function of the pin body. It can be understood that, in order to realize the connection of the end body and the end cover, the size of the end body must be suitable for interference connection with the connecting port of the end cover. On the other hand, considering that the end body mainly plays a connecting role with the end cover, but the rod body needs to bear the pressure from the traction plate, preferably, the shaft diameter of the end body is smaller than the shaft diameter of the rod body, that is, the strength of the rod body is greater than the strength of the end body.

[0033] In an embodiment, the damping ring is arranged on the surface of the rod body and detachably connected with the rod body. The damping ring mainly plays a role of damping and buffering, and is more likely to be damaged due to friction and extrusion of the traction pin and the traction plate, and often needs to be replaced with a new one. In the embodiment, the damping ring is detachably connected with the rod body, which facilitates the replacement of the damping ring. The specific connection mode of the damping ring and the rod body is not limited, as long as it can meet the above-mentioned requirements of fixing and replacing.

[0034] In an embodiment, the end cover is further provided with a notch, and the notch penetrates through the lower surface of the end cover close to the upper traction plate.

[0035] In the embodiment, the notch can replace the existing handle, and also plays a role of facilitating the use of the traction pin, but the handle structure is easy to shake with the vehicle body in use to cause noise, and the notch structure does not have this problem. The notch penetrates through the lower surface of the end cover close to the upper traction plate, that is, when the traction pin needs to be taken out, a tool such as a crowbar or pliers can be used to take out the traction pin installed in the traction plate by taking the notch as a fulcrum.

[0036] In an embodiment, in order to further facilitate the taking out of the traction pin, the number of notches is two, and the two notches are symmetrical on the same axis. In this way, when the taking-out tool is used, the two notch fulcrums can be relied on to further facilitate the taking out of the traction pin.

[0037] In an embodiment, the traction pin further comprises a safety pin, and the pin body is provided with a through hole, and the safety pin is arranged in the through hole.

[0038] The safety pin mainly plays a safety role, and can prevent the traction pin from falling off to cause a safety accident caused by the sudden separation of the upper traction plate and the lower traction plate when the vehicle is tilted. Therefore, the safety pin also needs to be taken out in advance before the traction pin is further taken out in normal use.

[0039] In an embodiment, the through hole is arranged at the end of the pin body close to the lower traction plate. The through hole is mainly used for mounting the safety pin, and thus the position of the through hole determines the mounting position of the safety pin. It should be noted that the arrangement of the through hole will inevitably affect the strength of the pin body to some extent, and the larger the through hole, the greater the impact. In the prior art, the through hole is usually arranged at the middle position of the pin body, i.e., the safety pin is mounted between the upper traction plate and the lower traction plate. However, if the pressure borne by the traction pin is too large, the traction pin may be broken at the position of the through hole of the pin body, and after the breakage, the traction pin cannot be used. In the present embodiment, the through hole is arranged at the end of the pin body close to the lower traction plate, i.e., the safety pin is mounted at the lower end of the lower traction plate. In this way, even if the risk of breakage occurs, the traction pin can still maintain the use function.

[0040] In an embodiment, the pin body is a metal solid structure, and the metal solid structure has higher strength, which is beneficial to improve the service life. Of course, according to the strength requirement of the pin body, the pin body can also be a hollow structure and other materials, as long as it can meet the normal use function.

[0041] The above is only a preferred embodiment of the present application, and does not limit the patent scope of the present application. Any equivalent structural transformation, direct / indirect application in other related technical fields based on the utility model concept of the present application and the content of the specification and drawings are included in the patent protection scope of the present application.

Claims

1. A traction pin, connected between an upper traction plate and a lower traction plate, comprising an end cap and a pin body, characterized in that: The end cap is interference-fitted with the pin, and shock-absorbing rings are provided at the connection points between the pin and the upper traction plate and the lower traction plate.

2. The traction pin according to claim 1, characterized in that: The end cap is provided with a connection port, which is adapted to be interference-fitted with the pin.

3. The traction pin according to claim 2, characterized in that: The pin includes a rod body and an end body, which are integrally formed. The rod body is connected between the upper traction plate and the lower traction plate, and the end body is interference-fitted with the end cap.

4. The traction pin according to claim 3, characterized in that: The shaft diameter of the rod body is larger than the shaft diameter of the end body, and the size of the end body is suitable for interference fit with the connection port.

5. The traction pin according to claim 4, characterized in that: The shock-absorbing ring is sleeved on the surface of the rod and is detachably connected to the rod.

6. The traction pin according to claim 1, characterized in that: The end cap is also provided with a slot, which extends through the lower surface of the end cap near the upper traction plate.

7. The traction pin according to claim 6, characterized in that: The number of slots is two, and they are symmetrical on the same axis.

8. The traction pin according to claim 1, characterized in that: The traction pin also includes a safety pin, and the pin body is provided with a through hole, through which the safety pin passes.

9. The traction pin according to claim 8, characterized in that: The through hole is located at the end of the pin near the lower traction plate.

10. The traction pin according to any one of claims 1-9, characterized in that: The pin is a solid metal structure.

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