Self-locking draw bar

Abstract

The utility model relates to a self-locking draw bar, in particular to a telescopic draw bar which comprises a fixing frame with a pin hole, a telescopic frame is arranged in the fixing frame, and at least two locking holes are arranged on the telescopic frame. And a telescopic device is arranged at the corresponding position of the pin hole. A detection hole is formed in the fixed frame, a positioning piece is arranged at the position, corresponding to the detection hole, of the telescopic frame, a first detection sensor used for detecting the positioning piece is arranged on the detection hole, and the first detection sensor is connected with a controller of the telescopic device. According to the self-locking traction rod, when the locking hole is aligned with the pin hole, the first detection sensor detects the positioning piece and sends out a signal, the controller of the telescopic device is started after receiving the detection signal, the telescopic rod of the telescopic device stretches out, the telescopic rod can be inserted into the locking hole through the pin hole, then the fixing frame and the telescopic frame are fixed, and the telescopic frame is locked; and the telescopic frame is fixedly connected with the fixed frame.

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 self-locking traction rod to solve the problems of low automation and high operation difficulty in the prior art of manually fixing the telescopic frame and the fixed frame.

[0005] The utility model provides a self-locking traction rod, including a fixed frame, a telescopic frame that slides forward and backward is arranged in the hollow cavity of the fixed frame, at least two locking holes are arranged on the telescopic frame, and a pin hole is arranged at the corresponding position of the fixed frame. A telescopic device is arranged at the corresponding position of the pin hole, and the 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. A detection hole is arranged on the fixed frame, and a positioning piece is arranged on the telescopic frame at the corresponding position of the detection hole. A first detection sensor for detecting the positioning piece is arranged on the detection hole, and the first detection sensor is connected to the controller of the telescopic device.

[0006] Preferably, the positioning member is a through hole, and the first detection sensor comprises a light source transmitter and a light signal receiver respectively arranged on both sides of the through hole, and the light signal receiver or the light source transmitter is arranged on the detection hole.

[0007] Preferably, there are two pin holes on the fixing frame, and the two pin holes are symmetrically arranged, the pin hole close to the telescopic device is the first pin hole, and the pin hole far from the telescopic device is the second pin hole;

[0008] When the telescopic rod of the telescopic device is extended, an extension section extends from the second pin hole; a second detection sensor is arranged on the periphery of the second pin hole, and the second detection sensor is used to detect the extension section; the second detection sensor is connected to the controller of the telescopic device.

[0009] More preferably, the extending section includes a through hole in the middle; and the second detection sensor includes a light source transmitter and a light signal receiver on both sides of the through hole.

[0010] More preferably, a cylindrical ring is fixed at the second pin hole, the protruding section is a detection rod, an opening is provided at the outer end of the ring, the detection rod is inserted into the ring from the opening and slides in the ring, the detection rod is connected to a return device that drives the detection rod to be inserted into the ring; the detection rod is extended out of the ring and approaches the sensor.

[0011] More preferably, the ring includes an internal cavity, the detection rod is inserted into the internal cavity, and the return device includes a return spring sleeved on the detection rod; a baffle is provided in the middle of the detection rod, and a top plate is also provided on the outer side of the internal cavity, and both ends of the spring are respectively connected to the baffle and the top plate.

[0012] More preferably, the rod section of the detection rod extending out of the collar is provided with a detection nut, and the diameter of the nut is larger than the diameter of the opening.

[0013] More preferably, the detection nut is provided with a through hole, and the second detection sensor includes a light source transmitter and a light signal receiver on both sides of the through hole.

[0014] Compared with the prior art, the self-locking traction rod provided by the utility model has the following beneficial effects:

[0015] The above-mentioned self-locking traction rod includes a fixed frame fixed on the front vehicle body, a telescopic frame that slides 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 first detection sensor detects the positioning member and sends a signal. After receiving the detection signal, the controller of the telescopic device is turned on and the telescopic rod of the telescopic device is extended. The telescopic rod can be inserted into the locking hole through the pin hole, thereby achieving the fixation of the fixed frame and the telescopic frame, locking the telescopic frame, and making the telescopic frame and the fixed frame fixedly connected. The alignment of the locking hole and the pin hole is detected by the first detection sensor, and the fixed frame and the telescopic frame are fixedly locked by the telescopic device. The telescopic device can be any telescopic drive device such as a telescopic motor, a hydraulic cylinder, a cylinder, etc. Compared with manually inserting the pin shaft, the automation of the control is improved, and the operator is prevented from operating the pin shaft in a narrow space. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] 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.

[0017] 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.

[0018] Figure 1 It is a partial three-dimensional structural schematic diagram of the self-locking traction rod in Example 1 of the utility model.

[0019] Figure 2 This is an exploded view of the connection relationship between the detection rod and the ring in Example 1 of the utility model.

[0020] Description of Figure Numbers:

[0021] Label name Label name 1 Telescopic device 5 Detection nut 2 Fixed bracket 6 Second detection sensor 3 Telescopic rack 7 Return spring 4 Ring 8 Detection rod DETAILED DESCRIPTION

[0022] 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.

[0023] 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.

[0024] 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.

[0025] 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.

[0026] 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.

[0027] 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.

[0028] Example 1

[0029] The present embodiment provides a self-locking traction rod, which includes a fixed frame 2, a telescopic frame 3 that slides forward and backward is arranged in the hollow cavity of the fixed frame 2, at least two locking holes are arranged on the telescopic frame 3, and a pin hole is arranged at the corresponding position of the fixed frame 2. A telescopic device 1 is arranged at the corresponding position of the pin hole, and the telescopic rod of the telescopic device 1 faces the pin hole. After the locking hole is aligned with the pin hole, the telescopic device 1 inserts the telescopic rod into the pin hole and the locking hole. A detection hole is arranged on the fixed frame 2, and a positioning piece is arranged on the telescopic frame 3 at the corresponding position of the detection hole. A first detection sensor for detecting the positioning piece is arranged on the detection hole, and the first detection sensor is connected to the controller of the telescopic device 1.

[0030] The self-locking traction rod comprises a fixed frame 2 fixed on the front vehicle body, a telescopic frame 3 sliding forward and backward is arranged in the hollow cavity of the fixed frame 2, the telescopic frame 3 is used to connect the rear vehicle body, a locking hole is arranged on the telescopic frame 3, and a pin hole is arranged on the fixed frame 2. When the locking hole and the pin hole are aligned, the first detection sensor detects the positioning member and sends a signal. After receiving the detection signal, the controller of the telescopic device 1 is turned on, and the controller controls the telescopic device 1 to start and extend the telescopic rod of the telescopic device 1. The telescopic rod can be inserted into the locking hole through the pin hole, thereby achieving the fixing of the fixed frame 2 and the telescopic frame 3, locking the telescopic frame 3, and fixing the telescopic frame 3 with the fixed frame 2. The alignment of the locking hole and the pin hole is completed by the first detection sensor, and the fixing and locking of the fixed frame 2 and the telescopic frame 3 is completed by the telescopic device 1. The telescopic device 1 can be any telescopic drive device such as a telescopic motor, a hydraulic cylinder, a cylinder, etc. Compared with manually inserting the pin shaft, the automation of the control is improved, and the operator is prevented from operating the pin shaft in a narrow space.

[0031] Specifically, in this embodiment, the positioning member is a through hole, and the first detection sensor includes a light source transmitter and a light signal receiver respectively arranged on both sides of the through hole, and the light signal receiver or the light source transmitter is arranged on the detection hole. When the positioning member moves to the through hole, the light source transmitter and the light signal receiver are connected, and the signal emitted by the light source transmitter can be received by the light signal receiver, and then the signal is obtained, and the start of the telescopic device 1 is controlled by the signal. The telescopic device 1 can be set to extend a preset distance after starting.

[0032] Specifically, in this embodiment, when the telescopic device 1 receives the start signal sent by the first detection sensor, it can start to extend the telescopic rod to a preset distance. At the same time, when it is necessary to detect whether the telescopic rod is successfully extended and whether the telescopic frame 3 and the fixed frame 2 are locked, it can also be completed in the following way: the fixed frame 2 is provided with two pin holes, and the two pin holes are symmetrically arranged, the pin hole close to the telescopic device 1 is the first pin hole, and the pin hole away from the telescopic device 1 is the second pin hole. When the telescopic rod of the telescopic device 1 is extended, an extension section extends from the second pin hole; the outer periphery of the second pin hole is provided with a second detection sensor 6, and the second detection sensor 6 is used to detect the extension section; the second detection sensor 6 is connected to the controller of the telescopic device 1. The above-mentioned extension section can be a part of the telescopic rod, or a detection rod 8 that can be directly or indirectly pushed out by the telescopic rod. When the second detection sensor 6 detects the extension section, it can send a signal to the controller to indicate that the telescopic rod has moved to the position, so that the telescopic device 1 stops working.

[0033] More specifically, in this embodiment, the second detection sensor 6 also adopts a conventional optical signal detection sensor, that is, the extended section includes a through hole in the middle; the second detection sensor 6 includes a light source transmitter and an optical signal receiver on both sides of the through hole.

[0034] More specifically, in this embodiment, when the extended section is the detection rod 8, in order to make the detection rod 8 move within the specified trajectory, a cylindrical collar 4 is fixed at the second pin hole, the extended section is the detection rod 8, and the outer end of the collar 4 is provided with an opening, and the detection rod 8 is inserted into the collar 4 from the opening and slides in the collar 4. At the same time, in order to use the above detection rod 8 multiple times, the detection rod 8 needs to be returned. At this time, the detection rod 8 is connected to a return device that drives the detection rod 8 to be inserted into the collar 4; the detection rod 8 extends out of the collar 4 and approaches the sensor.

[0035] More specifically, this embodiment also provides a specific implementation of the return device: the ring 4 includes an internal cavity, the detection rod 8 is inserted into the internal cavity, and the return device includes a return spring 7 sleeved on the detection rod 8; a baffle is provided in the middle of the detection rod 8, and a top plate is also provided on the outer side of the internal cavity, and the two ends of the spring are respectively connected to the baffle and the top plate.

[0036] Specifically, in this embodiment, in order to prevent the detection rod 8 from being completely extended into the ring 4, the rod section of the detection rod 8 extending out of the ring 4 is provided with a detection nut 5, and the diameter of the detection nut 5 is larger than the diameter of the opening. The diameter of the detection nut 5 is larger than the diameter of the opening, which means that the detection nut 5 cannot pass through the opening.

[0037] More specifically, when the detection nut 5 is provided on the detection rod 8, the second detection sensor 6 can also adopt a conventional optical signal detection sensor. The detection nut 5 is provided with a through hole, and the second detection sensor 6 includes a light source transmitter and an optical signal receiver on both sides of the through hole.

[0038] 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 self-locking traction rod, comprising a fixed frame, a telescopic frame that slides forward and backward is arranged in a hollow cavity of the fixed frame, at least two locking holes are arranged on the telescopic frame, and pin holes are arranged at corresponding positions of the fixed frame, characterized in that: A telescopic device is provided 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; The fixing frame is provided with a detection hole, the telescopic frame is provided with a positioning piece at a position corresponding to the detection hole, the detection hole is provided with a first detection sensor for detecting the positioning piece, and the first detection sensor is connected to the controller of the telescopic device.

2. The self-locking traction rod according to claim 1, characterized in that: The positioning member is a through hole, and the first detection sensor includes a light source transmitter and a light signal receiver respectively arranged on both sides of the through hole, and the light signal receiver or the light source transmitter is arranged on the detection hole.

3. The self-locking traction rod according to claim 1, characterized in that: There are two pin holes on the fixing frame, and the two pin holes are symmetrically arranged, the pin hole close to the telescopic device is the first pin hole, and the pin hole far from the telescopic device is the second pin hole; When the telescopic rod of the telescopic device is extended, an extension section extends from the second pin hole; a second detection sensor is arranged on the periphery of the second pin hole, and the second detection sensor is used to detect the extension section; the second detection sensor is connected to the controller of the telescopic device.

4. The self-locking traction rod according to claim 3, characterized in that: The extending section comprises a through hole in the middle; the second detection sensor comprises a light source transmitter and a light signal receiver on both sides of the through hole.

5. The self-locking traction rod according to claim 3, characterized in that: A cylindrical ring is fixed at the second pin hole, the protruding section is a detection rod, an opening is provided at the outer end of the ring, the detection rod is inserted into the ring from the opening and slides in the ring, the detection rod is connected to a return device that drives the detection rod to insert into the ring; the detection rod is extended out of the ring and approaches the sensor.

6. The self-locking traction rod according to claim 5, characterized in that: The ring includes an internal cavity, the detection rod is inserted into the internal cavity, and the return device includes a return spring sleeved on the detection rod; a baffle is provided in the middle of the detection rod, and a top plate is also provided on the outer side of the internal cavity, and the two ends of the spring are respectively connected to the baffle and the top plate.

7. The self-locking traction rod according to claim 5, characterized in that: The rod section of the detection rod extending out of the collar is provided with a detection nut, and the diameter of the nut is greater than the diameter of the opening.

8. The self-locking drawbar according to claim 7, characterized in that: The detection nut is provided with a through hole, and the second detection sensor comprises a light source transmitter and a light signal receiver on both sides of the through hole.

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