Telescopic draw bar

Abstract

The utility model relates to a telescopic draw bar which comprises a fixing frame, a telescopic frame sliding front and back is arranged in a hollow cavity of the fixing frame, a locking hole is formed in the telescopic frame, and a pin hole is formed in the corresponding position of the fixing frame. A telescopic device is arranged at the position corresponding to the pin hole, a telescopic rod of the telescopic device faces the pin hole, and the telescopic device enables the telescopic rod to be inserted into the pin hole and the locking hole after the locking hole is aligned with the pin hole. According to the telescopic draw bar, fixing and locking of the fixing frame and the telescopic frame are completed through the telescopic device, the telescopic device can be any telescopic driving device such as a telescopic motor, a hydraulic cylinder and an air cylinder, compared with manual pin shaft inserting, control automation is improved, and it is avoided that an operator operates the pin shaft in a narrow space.

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, that is, 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, the fixing and locking work of the telescopic frame, that is, the work of inserting the pin shaft, is done manually. The operator needs to observe the position of the telescopic frame and then insert the pin shaft, which makes the operation difficult for the operator. Utility Model Content

[0004] The main purpose of the utility model is to provide a telescopic traction rod to solve the problems of low automation and high operation difficulty in the prior art in which the telescopic frame and the fixed frame are fixed manually.

[0005] The utility model provides a telescopic traction rod, comprising a fixed frame, a telescopic frame that slides forward and backward is arranged in a hollow cavity of the fixed frame, a locking hole is arranged on the telescopic frame, and a pin hole is arranged at a corresponding position of the fixed frame. A telescopic device is arranged at a position corresponding to the pin hole, a telescopic rod of the telescopic device faces the pin hole, and the telescopic device inserts the telescopic rod into the pin hole and the locking hole after the locking hole is aligned with the pin hole.

[0006] Preferably, at least two locking holes are provided.

[0007] Preferably, the telescopic device is a telescopic air cylinder, a telescopic hydraulic cylinder or a telescopic motor, and the telescopic rod of the telescopic air cylinder, the telescopic hydraulic cylinder or the telescopic motor faces the pin hole.

[0008] Preferably, a detection hole is provided on the fixed frame, and a positioning hole is provided on the telescopic frame at a position corresponding to the detection hole. A photoelectric detector is provided on the detection hole, and the photoelectric detector is connected to the controller of the telescopic device. The photoelectric detector is a detection sensor installed on the detection hole, which can detect the positioning hole on the telescopic frame, and then send a signal to the controller after the telescopic frame slides to the specified position. The controller can send a signal and display it when the positioning hole is detected according to preset instructions, and control the telescopic device to extend the telescopic rod of the telescopic device, thereby realizing the locking and fixation of the telescopic frame and the fixed frame.

[0009] Preferably, a pin is provided in the locking hole, and the pin is connected to a return device that drives the pin to enter the locking hole; one end of the pin is close to the telescopic rod of the telescopic device, and the other end of the pin is away from the telescopic device and faces the pin hole away from the telescopic device.

[0010] More preferably, the telescopic frame includes side plates on both sides, and the locking holes are opened on the side plates on both sides; the return device includes a baffle plate arranged in the middle of the pin shaft, and a return spring is also sleeved on the pin shaft, one end of the return spring is connected to the baffle plate, and the other end of the return spring is connected to the side plate of the telescopic frame.

[0011] More preferably, the telescopic frame includes side panels on both sides, and the locking holes are opened on the side panels on both sides; the side panels on both sides are also provided with rings at positions corresponding to the locking holes, and the pin shaft is inserted into the rings.

[0012] More preferably, a box body is further provided on the side of the pin hole away from the telescopic device, and one end of the pin shaft is inserted into the box body when the telescopic rod of the telescopic device pushes out the pin shaft.

[0013] Compared with the prior art, the telescopic traction rod provided by the utility model has the following beneficial effects:

[0014] The telescopic traction rod comprises a fixed frame fixed on the front vehicle body, a telescopic frame sliding forward and backward is arranged in the hollow cavity of the fixed frame, the telescopic frame is used to connect the rear vehicle body, a locking hole is arranged on the telescopic frame, and a pin hole is arranged on the fixed frame. When the locking hole and the pin hole are aligned, the telescopic rod of the telescopic device can be inserted into the locking hole through the pin hole, thereby achieving the fixing of the fixed frame and the telescopic frame, locking the telescopic frame, and making the telescopic frame and the fixed frame fixedly connected. The fixing and locking of the fixed frame and the telescopic frame are completed by the telescopic device, which can be any telescopic drive device such as a telescopic motor, a hydraulic cylinder, a pneumatic cylinder, etc. Compared with manually inserting the pin shaft, the automation of control is improved, and the operator is prevented from operating the pin shaft in a narrow space. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] 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.

[0016] 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.

[0017] Figure 1It is a partial three-dimensional structural schematic diagram of the telescopic traction rod in Example 1 of the utility model.

[0018] Figure 2 It is a partial three-dimensional structure exploded diagram of the telescopic frame 5 in Example 1 of the utility model.

[0019] Description of Figure Numbers:

[0020] Label name Label name 1 Telescopic device 7 Pin 2 Bezel 8 Side panels 3 Ring 9 Locking hole 4 Return spring 5 Telescopic rack 6 Fixed bracket DETAILED DESCRIPTION

[0021] 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.

[0022] 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.

[0023] 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.

[0024] 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.

[0025] 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.

[0026] 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.

[0027] Example 1

[0028] This embodiment provides a telescopic traction rod, which includes a fixed frame 6, a telescopic frame 5 that slides forward and backward is arranged in the hollow cavity of the fixed frame 6, a locking hole 9 is arranged on the telescopic frame 5, and a pin hole is arranged at a corresponding position of the fixed frame 6. A telescopic device 1 is arranged at a position corresponding to the pin hole, and a telescopic rod of the telescopic device 1 faces the pin hole. After the locking hole 9 is aligned with the pin hole, the telescopic device 1 inserts the telescopic rod into the pin hole and the locking hole 9.

[0029] The telescopic traction rod comprises a fixed frame 6 fixed on the front vehicle body, a telescopic frame 5 sliding forward and backward is arranged in the hollow cavity on the fixed frame 6, the telescopic frame 5 is used to connect the rear vehicle body, a locking hole 9 is arranged on the telescopic frame 5, and a pin hole is arranged on the fixed frame 6. When the locking hole 9 and the pin hole are aligned, the telescopic rod of the telescopic device 1 can be inserted into the locking hole 9 through the pin hole, thereby achieving the fixing of the fixed frame 6 and the telescopic frame 5, locking the telescopic frame 5, and making the telescopic frame 5 and the fixed frame 6 fixedly connected. The fixing and locking of the fixed frame 6 and the telescopic frame 5 are completed by the telescopic device 1, and the telescopic device 1 can be any telescopic driving device such as a telescopic motor, a hydraulic cylinder, a pneumatic cylinder, etc. Compared with manually inserting the pin shaft 7, the automation of control is improved, and the operator is prevented from operating the pin shaft 7 in a narrow space.

[0030] Specifically, in this embodiment, the telescopic length of the telescopic frame 5 can also be controlled. To this end, at least two locking holes 9 are provided, that is, at least two are provided in the longitudinal direction. The pin hole is matched with different locking holes 9, and the telescopic frame 5 extends to different distances. At least two locking holes 9 are provided, and the pin hole can be aligned with any locking hole 9. When the extension length of the telescopic frame 5 needs to be adjusted, different locking holes 9 can be selected. The pin hole can be aligned with different locking holes 9, so that the telescopic frame 5 extends to different lengths to meet different requirements.

[0031] Specifically, in this embodiment, the telescopic device 1 is any existing device with a telescopic function, such as a telescopic cylinder, a telescopic hydraulic cylinder or a telescopic motor, and the telescopic rod of the telescopic cylinder, the telescopic hydraulic cylinder or the telescopic motor faces the pin hole. When it is necessary to lock the telescopic frame 5 and the fixed frame 6, it is only necessary to start the telescopic device 1, so that the telescopic rod of the telescopic device 1 is inserted into the locking hole 9 through the pin hole, so as to achieve the locking and fixing of the telescopic frame 5 and the fixed frame 6; when it is necessary to pull the telescopic frame 5, it is only necessary to start the telescopic device 1, so that the telescopic rod is retracted, and the telescopic rod is separated from the locking hole 9.

[0032] Specifically, in this embodiment, a detection hole is provided on the fixed frame 6, and a positioning hole is provided on the telescopic frame at a position corresponding to the detection hole. The positioning hole should correspond to the locking hole 9 one by one. A photoelectric detector is provided on the detection hole, and the photoelectric detector is connected to the controller of the telescopic device 1. When the photoelectric detector detects the positioning hole, the locking hole 9 and the pin hole are aligned, and the controller of the telescopic device 1 controls the extension or retraction of the telescopic rod according to the preset instructions. The photoelectric detector is a detection sensor installed on the detection hole, which can detect the positioning hole on the telescopic frame, and then send a signal to the controller after the telescopic frame slides to the specified position. The controller can send a signal and display according to the preset instructions when the positioning hole is detected, and control the telescopic device to extend the telescopic rod of the telescopic device, so as to achieve the locking and fixation of the telescopic frame and the fixed frame; the photoelectric detector can be any sensor that can detect the positioning hole. In this embodiment, a light source may be provided at one end of the positioning hole and a light signal receiver may be provided at the other end. When the telescopic frame moves to the positioning hole to align the light source and the light signal receiver, the light signal receiver receives a signal, which is a signal that the locking hole of the telescopic frame is aligned with the pin hole. The controller may control the telescopic device to start according to the signal.

[0033] Specifically, in the present embodiment, when the telescopic frame 5 is locked, the telescopic rod of the telescopic device 1 is subjected to greater force. In order to improve the fixing effect and stability of the telescopic frame 5 and the fixing frame 6 and solve the problem of limited telescopic length of the telescopic rod of the telescopic device 1, a pin shaft 7 is provided in the locking hole 9, and the pin shaft 7 is connected to a return device that drives the pin shaft 7 to enter the locking hole 9; one end of the pin shaft 7 is close to the telescopic rod of the telescopic device 1, and the other end of the pin shaft 7 is away from the telescopic device 1. The above-mentioned return device can be any return method in the prior art such as the return spring 4. When the telescopic rod of the telescopic device 1 is retracted, the return device drives the pin shaft 7 to be located in the locking hole 9. When the telescopic rod of the telescopic device 1 is extended, the telescopic rod overcomes the force of the return device to drive the pin shaft 7 to extend from the end away from the telescopic device 1, so that the inner end of the pin shaft 7 is stuck in the locking hole 9, and the outer end extends into the pin hole from the end away from the telescopic device 1; and the extended end of the telescopic rod of the telescopic device 1 extends into the locking device, that is, the telescopic rod of the telescopic device 1 is stuck in the pin hole and the locking hole close to the telescopic device, thereby realizing the locking of the two ends of the telescopic frame 5, and the telescopic distance of the telescopic rod in the above-mentioned locking process is small, so that the telescopic device 1 can realize the synchronous locking of the two sides of the telescopic frame 5 with a small telescopic distance, thereby improving the connection strength between the telescopic frame 5 and the fixed frame 6.

[0034] More specifically, in this embodiment, the telescopic frame 5 includes side plates 8 on both sides, the locking holes 9 are provided on the side plates 8 on both sides, and the locking of the side plates on both sides and the pin holes near the side plates is achieved through the pin shaft and the telescopic rod of the telescopic device; the return device includes a baffle 2 arranged in the middle of the pin shaft 7, and the middle refers to the part other than the two ends, and a return spring 4 is also sleeved on the pin shaft 7, one end of the return spring 4 is connected to the baffle 2, and the other end of the return spring 4 is connected to the side plates 8 of the telescopic frame 5. The telescopic frame 5 includes side plates 8 on both sides, and the space between the side plates 8 on both sides is convenient for installing the return device, and the installation method of the return spring 4 provided in this embodiment. One end of the return spring 4 is directly or indirectly connected to the side plate 8 of the telescopic frame 5, that is, it is connected to the main body of the telescopic frame 5, and the other end is connected to the baffle 2 on the pin shaft 7, driving the pin shaft 7 to move to one side. At the same time, the baffle 2 is located in the middle of the pin shaft 7, that is, it is located inside the telescopic frame 5. The baffle 2 can also limit the movement distance of the pin shaft 7, that is, the return spring 4 completes the return when the baffle 2 is directly or indirectly connected to the abutment side plate 8. At this time, the pin shaft 7 is located in the locking hole 9 as a whole.

[0035] More specifically, in the present embodiment, in order to improve the connection strength between the pin shaft 7 and the telescopic frame 5 and prevent the pin shaft 7 from being separated from the locking hole, and also to improve the locking strength, the telescopic frame 5 includes side plates 8 on both sides, and the locking holes 9 are opened on the side plates 8 on both sides; the side plates 8 on both sides are also provided with collars 3 at positions corresponding to the locking holes 9, and the pin shaft 7 is inserted into the collars 3.

[0036] More specifically, in the present embodiment, in order to prevent a protruding structure from appearing after the pin shaft 7 or the telescopic rod extends out of the locking hole 9, and also to prevent dust or debris from entering the fixing frame 6 from the locking hole 9 away from the telescopic device 1, a box body is further provided on the side of the pin hole away from the telescopic device 1, and one end of the pin shaft 7 is inserted into the box body when the telescopic rod of the telescopic device 1 pushes out the pin shaft 7.

[0037] 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, a telescopic frame that slides forward and backward is arranged in a hollow cavity of the fixed frame, a locking hole is arranged on the telescopic frame, and a pin hole is arranged at a corresponding position of the fixed frame, characterized in that: A telescopic device is arranged at a position corresponding to the pin hole, and a telescopic rod of the telescopic device faces the pin hole. After the locking hole is aligned with the pin hole, the telescopic device inserts the telescopic rod into the pin hole and the locking hole.

2. The telescopic tow bar according to claim 1, characterized in that: At least two locking holes are provided.

3. The telescopic tow bar according to claim 1, characterized in that: The telescopic device is a telescopic air cylinder, a telescopic hydraulic cylinder or a telescopic motor, and the telescopic rod of the telescopic air cylinder, the telescopic hydraulic cylinder or the telescopic motor faces the pin hole.

4. The telescopic tow bar according to claim 1, characterized in that: The fixing frame is provided with a detection hole, the telescopic frame is provided with a positioning hole at a position corresponding to the detection hole, the detection hole is provided with a photoelectric detector, and the photoelectric detector is connected to the controller of the telescopic device.

5. The telescopic tow bar according to claim 1, characterized in that: A pin is arranged in the locking hole, and the pin is connected to a return device for driving the pin to enter the locking hole; one end of the pin is close to the telescopic rod of the telescopic device, and the other end of the pin is away from the telescopic device and faces the pin hole away from the telescopic device.

6. The telescopic tow bar according to claim 5, characterized in that: The telescopic frame includes side plates on both sides, and the locking holes are opened on the side plates on both sides; the return device includes a baffle plate arranged in the middle of the pin shaft, and a return spring is also sleeved on the pin shaft, one end of the return spring is connected to the baffle plate, and the other end of the return spring is connected to the side plate of the telescopic frame.

7. The telescopic tow bar according to claim 5 or 6, characterized in that: The telescopic frame comprises side plates at both sides, and the locking holes are arranged on the side plates at both sides; the side plates at both sides are also provided with collars at positions corresponding to the locking holes, and the pin shaft is inserted into the collars.

8. The telescopic tow bar according to claim 5 or 6, characterized in that: A box body is also provided on the side of the pin hole away from the telescopic device, and one end of the pin shaft is inserted into the box body when the telescopic rod of the telescopic device pushes out the pin shaft.

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