Telescopic draw bar

Abstract

The utility model relates to a telescopic draw bar. The telescopic draw bar comprises a fixing frame and a telescopic frame which slides back and forth in the fixing frame. A guide rod extending forwards is arranged at the end, extending into the hollow cavity of the fixing frame, of the telescopic frame, a baffle is arranged in the hollow cavity of the fixing frame, a guide hole is formed in the baffle, and the guide rod is inserted into the guide hole and slides back and forth in the guide hole. According to the telescopic traction rod, the guide rod is arranged on the front portion of the telescopic frame, the guide rod moves front and back in the hollow cavity, the guide rod is guided and limited through the guide hole in the baffle, the effects of limiting deviation of the telescopic frame and improving the stability of the telescopic frame are achieved, and meanwhile compared with the mode that the length of the telescopic frame is directly increased, the weight of the telescopic frame can be reduced; and the overall weight of the telescopic draw bar is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of traction rods, in particular to a traction rod used for connecting a front vehicle body and a rear vehicle body. Background Art

[0002] The towing rod for vehicle towing plays an important role in the process of vehicle towing, facilitating the installation and carrying of the rear vehicle body, and facilitating the connection and fixation of the rear vehicle body. The conventional towing rod includes a fixed frame and a telescopic frame, the telescopic frame is inserted into the hollow cavity of the fixed frame and moves back and forth in the fixed frame, and a locking device is provided between the fixed frame and the telescopic frame, such as a locking hole is provided on the telescopic frame, a pin hole is provided on the fixed frame, and the pin shaft is inserted into the locking hole on the telescopic frame through the pin hole on the fixed frame, thereby realizing the fixing and locking of the telescopic frame.

[0003] However, when the telescopic frame moves forward and backward in the fixed frame, if the length of the telescopic frame is small and the length and proportion of the telescopic frame extension are too large, the telescopic frame is prone to shaking or shifting, especially the telescopic frame shifts downward under the action of gravity; and increasing the overall length of the telescopic frame will inevitably increase the overall weight of the telescopic traction rod. Utility Model Content

[0004] The main purpose of the utility model is to provide a telescopic traction rod to solve the problem that the telescopic frame in the prior art is easy to shake or deflect when it is short, and the weight of the telescopic traction rod is increased when the telescopic frame is too long.

[0005] The utility model provides a telescopic traction rod, comprising a fixed frame, a hollow cavity is arranged in the fixed frame, a telescopic frame is arranged in the hollow cavity, and the telescopic frame is inserted into the hollow cavity from the rear and slides forward and backward in the hollow cavity. A guide rod extending forward is arranged at one end of the telescopic frame extending into the hollow cavity, a baffle is arranged in the hollow cavity of the fixed frame, a guide hole is arranged on the baffle, the guide rod is inserted into the guide hole, and slides forward and backward in the guide hole.

[0006] Preferably, the baffle comprises a limiting baffle, the guide hole on the limiting baffle is a limiting hole, and a limiting block having a diameter greater than a diameter of the limiting hole is provided on one side of the guide rod inserted into the front of the limiting hole.

[0007] More preferably, one end of the guide rod extending into the front portion of the limiting hole is provided with a threaded section, and the limiting block is a nut threadedly connected to the threaded section.

[0008] More preferably, there are two limit baffles, and the limit block is located between the two limit baffles and moves back and forth between the two limit baffles.

[0009] Preferably, the baffle comprises a limiting baffle, the guide hole on the limiting baffle is a limiting hole, the guide rod is further provided with a protruding block on one side of the rear portion of the limiting hole, and the diameter of the protruding block is greater than the diameter of the limiting hole.

[0010] Preferably, the baffle further comprises a guide plate, the guide hole on the guide plate is a guide hole, and the guide rod moves back and forth in the guide hole.

[0011] Preferably, a sealing plate is provided at the rear of the telescopic frame, and the guide rod is connected to the sealing plate.

[0012] Compared with the prior art, the telescopic traction rod provided by the utility model has the following beneficial effects:

[0013] The telescopic traction rod comprises a fixed frame fixed on the front vehicle body, and a telescopic frame sliding forward and backward is arranged in the hollow cavity of the fixed frame, and the telescopic frame is used to connect the rear vehicle body. The telescopic frame slides forward and backward in the above-mentioned hollow cavity. When the length of the telescopic frame is large, the telescopic frame has strong stability and is not easy to deviate sideways, but it will cause the overall weight of the telescopic traction frame to be too large; when the length of the telescopic frame is small, due to the reduction of the part of the telescopic frame located in the hollow cavity, it is easy to cause the connection strength between the telescopic frame and the fixed frame to decrease, and the telescopic frame is easy to swing or deviate sideways, especially downward, and the stability of the telescopic frame needs to be improved. However, in the utility model, a guide rod is arranged at the front of the telescopic frame, and the guide rod moves forward and backward in the hollow cavity. The guide rod is guided and limited by the guide hole on the baffle, which plays a role in limiting the deviation of the telescopic frame and improving the stability of the telescopic frame. At the same time, compared with directly increasing the length of the telescopic frame, the stability of the telescopic frame is improved by the guide rod, and a guiding effect is provided for the movement of the telescopic frame, which can also reduce the weight of the telescopic frame, thereby reducing the overall weight of the telescopic traction rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art are briefly introduced below.

[0015] Obviously, the drawings described below are only some specific embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without any creative work.

[0016] Figure 1 It is a partial structural exploded diagram of the telescopic frame in Example 1 of the utility model.

[0017] Figure 2 This is an exploded view of the fixing frame and the baffle in Example 1 of the utility model.

[0018] Description of Figure Numbers:

[0019] Label name Label name 1 Telescopic rack 5 Bezel 2 Guide rod 6 Guide hole 3 Limit block 4 Sealing board DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0021] Based on the embodiments of the present utility model, all other embodiments obtained by ordinary technicians in the field without making any creative work shall fall within the scope of protection of the present utility model.

[0022] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0023] In addition, in the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0024] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" 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 ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0025] In addition, the technical solutions between the various embodiments of the present invention can be combined with each other, but it must be based on the fact that ordinary technicians in the field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0026] Example 1

[0027] This embodiment provides a telescopic traction rod, which includes a fixed frame, a hollow cavity is provided in the fixed frame, a telescopic frame 1 is provided in the hollow cavity, and the telescopic frame 1 is inserted into the hollow cavity from the rear and slides forward and backward in the hollow cavity. A guide rod 2 extending forward is provided at one end of the telescopic frame 1 extending into the hollow cavity, a baffle 5 is provided in the hollow cavity of the fixed frame, a guide hole 6 is provided on the baffle 5, and the guide rod 2 is inserted into the guide hole 6 and slides forward and backward in the guide hole 6.

[0028] The telescopic traction rod comprises a fixed frame fixed on the front vehicle body, a telescopic frame 1 sliding forward and backward is arranged in the hollow cavity on the fixed frame, and the telescopic frame 1 is used to connect the rear vehicle body. The telescopic frame 1 slides forward and backward in the hollow cavity. When the length of the telescopic frame 1 is large, the telescopic frame 1 has strong stability and is not easy to deviate sideways, but it will cause the overall weight of the telescopic traction frame to be too large; when the length of the telescopic frame 1 is small, the part of the telescopic frame 1 located in the hollow cavity is reduced, and the extended part accounts for too large a proportion, which is easy to cause the connection strength between the telescopic frame 1 and the fixed frame to decrease, and the telescopic frame 1 is easy to swing or deviate sideways, especially downward, and the stability of the telescopic frame 1 needs to be improved. However, in the present embodiment, a guide rod 2 located in the hollow cavity is provided at the front portion of the telescopic frame 1, and the overall length of the telescopic frame 1 is increased by the guide rod 2. The guide rod 2 moves back and forth in the hollow cavity, and the guide rod 2 is guided and limited by the guide hole 6 on the baffle 5, which plays a role in limiting the sliding direction of the telescopic frame 1, preventing the telescopic frame 1 from deflecting, and improving the stability of the telescopic frame 1; at the same time, compared with directly increasing the length of the telescopic frame 1, the stability of the telescopic frame 1 is increased by the guide rod 2, and a guiding effect is provided for the movement of the telescopic frame 1, which can also reduce the weight of the telescopic frame 1, thereby reducing the overall weight of the telescopic traction rod.

[0029] Specifically, in this embodiment, in order to prevent the telescopic frame 1 from extending out of the fixed frame as a whole, that is, from being separated from the fixed frame, the baffle 5 includes a limit baffle 5, and the guide hole 6 on the limit baffle 5 is a limit hole. The guide rod 2 is inserted into the front part of the limit hole and is provided with a limit block 3 having a diameter larger than the diameter of the limit hole. It should be noted that the diameter of the limit block 3 is larger than the limit hole, which means that the limit block 3 is too large to pass through the limit hole. When the cross section of the limit hole or the limit block 3 is not circular, the above diameter should refer to the value at the maximum width of the limit block 3 or the limit hole. When the telescopic frame 1 extends outward to a preset length value, the limit block 3 abuts the outer periphery of the limit hole to prevent the guide rod 2 and the main body of the telescopic frame 1 from moving outward, thereby preventing the telescopic frame 1 from extending out of the fixed frame too much or extending out of the fixed frame as a whole.

[0030] More specifically, in this embodiment, the above-mentioned limit block 3 can be integrally welded on the guide rod 2, or integrally formed with the guide rod 2, but in this embodiment, a more convenient installation method of the limit block 3 is also provided: the end of the guide rod 2 extending into the front of the limit hole is provided with a threaded section, and the limit block 3 is a nut threadedly connected to the threaded section. Of course, in order to prevent the nut from detaching, the nut can also be provided with a protruding structure, and a pin hole is provided on the guide rod 2. After the pin is inserted into the pin hole, it is stuck on each protruding structure, thereby preventing the nut from loosening and rotating. It should be noted that the above-mentioned limit block 3 can be provided at the front end of the guide rod 2, or on the front rod section of the guide rod 2 close to the front end.

[0031] More specifically, in this embodiment, in order to limit the extension range of the telescopic frame 1 from the fixed frame and the extension range into the fixed frame, that is, to control the forward and backward sliding range of the telescopic frame 1, there are two limit baffles 5, and the limit block 3 is located between the two limit baffles 5 and moves forward and backward between the two limit baffles 5. The limit block 3 is located between the two limit baffles 5, and due to the obstruction of the limit hole, the limit block 3 can only move forward and backward between the two limit baffles 5, thereby making the forward and backward moving distance of the telescopic frame 1 consistent with the distance between the two limit baffles 5, thereby limiting the forward and backward moving range of the telescopic frame 1, and preventing the telescopic frame 1 from excessively extending into the fixed frame or excessively extending out of the fixed frame.

[0032] Specifically, in this embodiment, in order to prevent the telescopic frame 1 from extending too far into the fixed frame, or even extending its entirety into the fixed frame, the baffle plate 5 includes a limit baffle plate 5, and the guide hole 6 on the limit baffle plate 5 is a limit hole; the guide rod 2 is also provided with a protruding block on one side of the rear part of the limit hole, and the diameter of the protruding block is greater than the diameter of the limit hole, that is, the protruding block cannot pass through the limit hole.

[0033] Specifically, in the present embodiment, the baffle plate 5 plays a supporting and guiding role, that is, the baffle plate 5 also includes a guide plate, and the guide hole 6 on the guide plate is a guide hole, and the guide rod 2 moves back and forth in the guide hole.

[0034] Specifically, a sealing plate 4 is provided at the rear of the telescopic frame 1, and the guide rod 2 is connected to the sealing plate 4. The setting of the sealing plate 4 facilitates the installation of the guide rod 2. At the same time, the installation of the guide rod 2 can be performed by providing a mounting hole on the sealing plate 4, and providing a thin-diameter section at the rear of the guide rod 2, and the thin-diameter section is inserted into the mounting hole. At the same time, washers passing through the guide rod 2 are provided on both sides of the sealing plate 4, and the guide rod 2 is inserted into the rear end of the sealing plate 4 and fixed by a nut, and the nut is threadedly connected to the thin-diameter section. In order to prevent the nut from loosening, a plurality of protrusions can be provided on the nut, and a pin hole and a pin shaft that can be inserted into the pin hole are provided on the guide rod 2. After the pin shaft is inserted into the pin hole, it is stuck in the gap between the protrusions, thereby preventing the nut from loosening.

[0035] Of course, the above description is only a preferred embodiment of the utility model, and does not limit the patent scope of the utility model. All equivalent structural changes made by using the contents of the utility model specification and drawings under the utility model concept of the utility model, or direct / indirect application in other related technical fields are included in the patent protection scope of the utility model and should be protected by the utility model.

Claims

1. A telescopic traction rod, comprising a fixed frame, wherein a hollow cavity is arranged in the fixed frame, wherein a telescopic frame is arranged in the hollow cavity and inserted into the hollow cavity from the rear and slides forward and backward in the hollow cavity, Features: One end of the telescopic frame extending into the hollow cavity is provided with a guide rod extending forward, a baffle is provided in the hollow cavity of the fixed frame, a guide hole is provided on the baffle, the guide rod is inserted into the guide hole and slides back and forth in the guide hole.

2. The telescopic traction rod according to claim 1, It is characterized in that The baffle comprises a limit baffle, the guide hole on the limit baffle is a limit hole, and a limit block having a diameter greater than that of the limit hole is arranged on one side where the guide rod is inserted into the front part of the limit hole.

3. The telescopic traction rod according to claim 2, It is characterized in that One end of the guide rod extending into the front part of the limiting hole is provided with a threaded section, and the limiting block is a nut threadedly connected to the threaded section.

4. The telescopic traction rod according to claim 2, It is characterized in that There are two limit baffles, and the limit block is located between the two limit baffles and moves back and forth between the two limit baffles.

5. The telescopic traction rod according to claim 1, It is characterized in that The baffle plate comprises a limiting baffle plate, and the guide hole on the limiting baffle plate is a limiting hole; the guide rod is also sleeved with a protruding block on one side of the rear part of the limiting hole, and the diameter of the protruding block is greater than the diameter of the limiting hole.

6. The telescopic traction rod according to claim 1, It is characterized in that The baffle further comprises a guide plate, the guide hole on the guide plate is a guide hole, and the guide rod moves back and forth in the guide hole.

7. The telescopic traction rod according to claim 1, It is characterized in that A sealing plate is arranged at the rear of the telescopic frame, and the guide rod is connected to the sealing plate.

Images