Tractor

Abstract

The tractor comprises a traction seat, an opening is formed in the front end of the traction seat, and a base is arranged on the lower portion of the opening. A pin shaft capable of moving up and down is further arranged in the opening, an operating piece is arranged on the upper portion of the traction base, and the operating piece controls the pin shaft to move up and down. The pin shaft comprises an upper shaft section and a lower shaft section, and the lower shaft section is rotationally connected with the upper shaft section. According to the tractor, the pin shaft is divided into the upper shaft section and the lower shaft section, the upper shaft section is used for being connected with the operating piece, the lower shaft section is arranged to be rotationally connected with the upper shaft section, namely, the lower shaft section can rotate, when the connecting ring oscillates, the pin shaft can be driven to rotate, and then the friction position between the connecting ring and the pin shaft is continuously changed; all parts of the pin shaft can be randomly abraded under the condition that the main body structure and the performance are not influenced, so that excessive local abrasion is avoided, and the service life of the pin shaft is prolonged.

Description

Technical Field

[0001] This utility model relates to the field of traction technology, specifically a traction device for connection. Background Technology

[0002] A tow hitch is a standard piece of equipment in a vehicle, used to connect the front and rear bodies. When a connecting ring is installed on one body, a tow hitch with a pin is installed on the other body. The connecting ring is engaged with the pin, thus connecting the front and rear bodies.

[0003] The existing towing device includes a base with a pin that can move up and down. A connecting ring is inserted into the pin to connect the front and rear vehicle bodies.

[0004] However, during use, the force exerted on the pin by the connecting ring can easily cause severe wear in certain areas of the pin, thus reducing its service life. Utility Model Content

[0005] The main purpose of this utility model is to provide a traction device to solve the problem of uneven wear of the pin shaft in the existing traction device, and severe wear in some areas.

[0006] This utility model provides a traction device, which includes a traction seat with an opening at its front end and a base at the lower part of the opening. A vertically movable pin is also provided within the opening. An operating component is provided on the upper part of the traction seat, controlling the vertical movement of the pin. The pin includes an upper section and a lower section. The upper section is connected to the operating component, which can be a direct or indirect connection; that is, the operating component can be indirectly connected to the upper section via a fork or similar structure to control the vertical movement of the upper section. The lower section is rotatably connected to the upper section.

[0007] Preferably, the upper part of the opening is provided with a pin hole, the pin moves up and down in the pin hole, and when the lower end of the pin abuts against the base, the upper part of the lower shaft section extends upward into the pin hole.

[0008] Preferably, the upper part of the opening is provided with a shift fork, the operating component includes an operating rod, the operating rod is connected to the shift fork, and the upper shaft section is provided with a connecting hole adapted to the shift fork.

[0009] Preferably, the lower part of the upper shaft section is provided with a circular groove, and the upper part of the lower shaft section is provided with a circular protrusion. The circular protrusion is inserted into the circular groove and rotates within the circular groove. An anti-detachment component is also provided between the upper shaft section and the lower shaft section to prevent them from separating.

[0010] More preferably, the anti-detachment component includes a protruding ring disposed on the circular protrusion, an insertion hole provided on the circular groove, an anti-detachment pin inserted into the insertion hole, and the anti-detachment pin being engaged with the lower part of the protruding ring.

[0011] Preferably, there are two insertion holes, the anti-detachment pin is inserted into one insertion hole and extends out of the other insertion hole; the middle part of the anti-detachment pin is located inside the circular groove, and the upper part of the anti-detachment pin abuts against the protruding ring.

[0012] Preferably, the base is provided with a groove, and the lower end of the lower shaft section is inserted into the groove.

[0013] Preferably, a chamfer is provided at the rotatable connection between the lower shaft segment and the upper shaft segment, and the chamfer controls the unidirectional rotation of the lower shaft segment.

[0014] The traction device provided by this utility model has the following advantages compared with the prior art:

[0015] The aforementioned traction device comprises a pin consisting of an upper section and a lower section. The upper section connects to an operating component, allowing operators to control the pin's vertical movement. This component can be a manually operated lever or a device driven by a cylinder or telescopic motor. The lower section is rotatably connected to the upper section, enabling it to rotate. When connecting to a vehicle body, a connecting ring is inserted into the opening, and the pin is lowered using the operating component. The pin then inserts into the connecting ring, connecting the pin and the ring, thus achieving the traction connection between the front and rear vehicle bodies.

[0016] In the aforementioned traction device, the force between the connecting ring and the pin is relatively large during use, and they experience long-term wear. However, in this application, due to the rotating connection of the lower shaft section, when the connecting ring vibrates, it can drive the pin to rotate, thereby causing the friction position between the connecting ring and the pin to continuously change, avoiding uneven wear. Through this design, the pin can be randomly worn at various points without affecting the main structure and performance, avoiding excessive local wear, increasing the service life of the pin, and thus increasing the service life of the traction device. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below.

[0018] Obviously, the accompanying drawings described below are only some specific embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without any creative effort.

[0019] Figure 1 This is a three-dimensional structural diagram of the traction device in Embodiment 1 of this utility model.

[0020] Figure 2 This is a cross-sectional view of the traction device in Embodiment 1 of this utility model.

[0021] Figure 3 This is a three-dimensional structural diagram of the pin shaft in Embodiment 1 of this utility model.

[0022] Figure 4 This is a three-dimensional structural diagram of the lower shaft segment in Embodiment 1 of this utility model.

[0023] Figure 5 This is a three-dimensional structural diagram of the upper shaft segment in Embodiment 1 of this utility model.

[0024] Explanation of icon numbers:

[0025] label name label name 1 Opening 7 Connection hole 2 base 8 Socket 3 lower section 9 Circular groove 4 upper section 10 Circular protrusion 5 fork 11 Protruding ring 6 control lever Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0027] Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0028] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0029] Furthermore, in this utility model, the use of terms such as "first," "second," etc., is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0030] In this utility model, unless otherwise explicitly specified and limited, the terms "connection," "fixing," etc., should be interpreted broadly. For example, "fixing" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0031] Furthermore, the technical solutions of the various embodiments of this utility model can be combined with each other, but only if they are based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0032] Example 1

[0033] This embodiment provides a traction device, which includes a traction seat. The front end of the traction seat has an opening 1, and a base 2 is located at the lower part of the opening 1. A vertically movable pin is also provided within the opening 1. An operating component is located on the upper part of the traction seat, and the operating component controls the vertical movement of the pin. The pin includes an upper shaft section 4 and a lower shaft section 3. The upper shaft section 4 is connected to the operating component. This connection can be indirect; that is, the operating component can be any existing method capable of realizing the vertical movement of the pin, such as a fork, pull rope, telescopic motor, bolt, or snap-fit. Operating the operating component controls the vertical movement of the upper shaft section. The lower shaft section 3 is rotatably connected to the upper shaft section 4.

[0034] When using the aforementioned traction device, the connecting ring is first inserted into the opening 1. Then, the pin is moved downwards by the operating component, causing the pin to enter the opening 1 and insert into the ring of the connecting ring, thus completing the traction connection. In this embodiment, the upper shaft section 4 of the pin is moved up and down by the operating component. Due to the limitation of the control connection, the upper shaft section 4 cannot rotate; however, the lower shaft section 3 inserted into the connecting ring can rotate relative to the upper shaft section 4. When the traction device is working, the oscillation of the connecting ring will drive the lower shaft section 3 to move, thereby causing the lower shaft section 3 to rotate randomly, thus changing the position of the contact point between the connecting ring and the pin, avoiding excessive wear on the front and rear sides of the pin.

[0035] Specifically, in this embodiment, the pin is moved up and down by an operating component. This component can be operated in any existing way to move the pin up and down. When the operating component moves the pin upwards, the entire pin or most of it should be located in the upper space of the opening to avoid affecting the insertion of the connecting ring. When the connecting ring is inserted into the opening 1, the operating component can control the pin to move downwards, and the pin bears all the tension of the connecting ring. In this embodiment, to avoid the rotational connection of the pin affecting its mechanical strength, a pin hole is provided at the upper part of the opening 1. The pin moves up and down within this pin hole. When the lower end of the pin abuts against the base 2, the upper part of the lower shaft section 3 extends upwards into the pin hole. This arrangement means that the upper shaft section 4 should run vertically through the opening 1 and extend into the pin hole at the upper part of the opening 1. When the pin is under force, the main force is applied to the lower shaft section 3, thus preventing damage to the rotational connection between the upper and lower shaft sections 3.

[0036] Specifically, in this embodiment, the upper part of the opening 1 is provided with a shift fork 5, the operating component includes an operating rod 6, the operating rod 6 is connected to the shift fork 5, and the upper shaft section 4 is provided with a connecting hole 7 adapted to the shift fork 5.

[0037] Specifically, in this embodiment, a specific rotational connection method for the upper and lower pins is also provided. In this embodiment: a circular groove 9 is provided at the lower part of the upper shaft section 4, and a circular protrusion 10 is provided at the upper part of the lower shaft section 3. The circular protrusion 10 is inserted into the circular groove 9 and rotates within the circular groove 9. An anti-detachment component is also provided between the upper shaft section 4 and the lower shaft section 3 to prevent them from separating. That is, the upper and lower shaft sections 3 are respectively provided with a circular groove 9 and a circular protrusion 10, and the circular protrusion 10 can rotate within the circular groove 9. Of course, since the upper and lower shaft sections 3 are arranged vertically, an anti-detachment component must also be provided to prevent them from separating. This anti-detachment component can be a boss on the upper shaft section 4 that lifts the lower shaft section 3, or it can be any technology that prevents the lower shaft section 3 from separating by means of detachment or welding.

[0038] Specifically, in this embodiment, the anti-detachment component includes a protruding ring 11 disposed on the circular protrusion 10. The diameter of the protruding ring should be smaller than the diameter of the circular groove 9 so that the protruding ring 11 can extend into the circular groove 9. In this embodiment, the circular groove 9 is provided with an insertion hole 8, and an anti-detachment pin is inserted into the insertion hole 8. The anti-detachment pin is engaged with the lower part of the protruding ring 11. That is, after the protruding ring 11 is inserted into the circular groove 9, the anti-detachment pin is inserted into the circular groove 9. The anti-detachment pin is located at the lower part of the protruding ring 11, and the protruding ring 11 is engaged by the anti-detachment pin to prevent the lower shaft section 3 from detaching from the upper shaft section 4.

[0039] Specifically, this embodiment also provides a specific installation method for the anti-detachment pin. There are two insertion holes 8; the anti-detachment pin is inserted into one insertion hole 8 and extends out from the other. The middle part of the anti-detachment pin is located inside the circular groove 9, and the upper part of the anti-detachment pin abuts against the protruding ring 11. Installing the anti-detachment pin in this way is relatively simple and easy to disassemble.

[0040] Specifically, in this embodiment, to improve the strength of the pin, the base is provided with a groove, and the lower end of the lower shaft section is inserted into the groove. The lower shaft section is inserted into the groove, while the upper part is locked in the pin hole, so that the lower shaft section is locked in place by the groove and the pin hole respectively, thereby improving the load-bearing capacity of the lower shaft section.

[0041] Specifically, in this embodiment, the rotation of the lower shaft segment 3 relative to the upper shaft segment 4 is random. In order to further improve the uniformity of wear on the pin, a chamfer is provided at the rotational connection between the lower shaft segment 3 and the upper shaft segment 4. The chamfer controls the unidirectional rotation of the lower shaft segment 3. The chamfer is a protruding chamfer structure provided between the anti-detachment pin and the protruding ring 11, between the circular protrusion 10 and the circular groove 9, or between the pin hole and the lower pin. The chamfer structure is a protrusion with a larger angle on one side and a smaller angle on the other side in the direction of pin rotation. The chamfer structure can make the pin rotate randomly, thereby improving the uniformity of wear on the pin.

[0042] Of course, the above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the inventive concept of the present utility model using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model and should be protected by the present utility model.

Claims

1. A traction device, comprising a traction seat, wherein an opening is provided at the front end of the traction seat, and a base is provided at the lower part of the opening; a vertically movable pin is further provided within the opening, and an operating element is provided at the upper part of the traction seat, the operating element controlling the vertical movement of the pin; characterized in that, The pin includes an upper shaft section and a lower shaft section, and the lower shaft section is rotatably connected to the upper shaft section.

2. The traction device as described in claim 1, characterized in that, The upper part of the opening is provided with a pin hole, and the pin moves up and down in the pin hole. When the lower end of the pin abuts against the base, the upper part of the lower shaft section extends upward into the pin hole.

3. The traction device as described in claim 1, characterized in that, The operating component includes an operating lever connected to a shift fork, and the upper shaft section is provided with a connecting hole adapted to the shift fork.

4. The traction device as described in claim 1, characterized in that, The lower part of the upper shaft section is provided with a circular groove, and the upper part of the lower shaft section is provided with a circular protrusion. The circular protrusion is inserted into the circular groove and rotates within the circular groove. An anti-detachment component is also provided between the upper shaft section and the lower shaft section to prevent them from separating.

5. The traction device as described in claim 4, characterized in that, The anti-detachment component includes a protruding ring disposed on the circular protrusion, and an insertion hole is provided on the circular groove. An anti-detachment pin is inserted into the insertion hole and the anti-detachment pin is engaged with the lower part of the protruding ring.

6. The traction device as described in claim 5, characterized in that, The device has two sockets, and the anti-detachment pin is inserted into one socket and extends out from the other socket; the middle part of the anti-detachment pin is located inside the circular groove, and the upper end face of the anti-detachment pin abuts against the protruding ring.

7. The traction device as claimed in claim 1, characterized in that, The base is provided with a groove, and the lower end of the lower shaft section is inserted into the groove.

8. The traction device as claimed in claim 1, characterized in that, A chamfer is also provided at the rotatable connection between the lower shaft segment and the upper shaft segment, and the chamfer controls the unidirectional rotation of the lower shaft segment.

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