Traction force detection structure

Abstract

The utility model relates to a traction force detection structure which comprises a traction pin detachably installed on a saddle, the traction pin is provided with a through hole in the radial direction, an elastic body is arranged in the through hole, the elastic body and the traction pin are of an integrated structure, and two containing spaces are arranged between the two side ends of the elastic body and the traction pin. A strain gauge is arranged in one containing space, attached to one side end of the elastic body and used for being in communication connection with a processing system. The traction force detection structure not only can detect the traction force, but also is simple in structure, does not need to be provided with auxiliary equipment for detection, and saves cost and occupied space.

Description

Technical Field

[0001] The utility model relates to the technical field of tractors, in particular to a traction force detection structure. Background Art

[0002] The towing pin in the prior art is usually a solid cylinder, which is fixed with the main vehicle saddle to realize the universal towing function. During the driving process of the main vehicle and the towed trailer, the trailer handling system cannot monitor the traction data of the main vehicle and the trailer through the towing pin, so it needs to use other auxiliary equipment to detect the traction, resulting in complex structure and low detection accuracy. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a traction force detection structure, which can not only detect the traction force, but also has a simple structure and does not require auxiliary equipment for detection, thus saving costs and occupying space.

[0004] The utility model adopts the following technical solution to solve the technical problem: a traction force detection structure, comprising a traction pin detachably mounted on a saddle, the traction pin having a through hole radially opened therein, an elastomer vertically arranged in the through hole, the elastomer and the traction pin forming an integrated structure, two accommodating spaces being arranged between the two side ends of the elastomer and the traction pin, a strain gauge being arranged in one of the accommodating spaces, the strain gauge being attached to one side end of the elastomer, and the strain gauge being used for communication connection with a processing system.

[0005] The traction force detection structure attaches a strain gauge to the elastic body in the traction pin. During the driving process of the main vehicle and the towed trailer, the strain gauge generates a detection signal as the elastic body is deformed by force, and the detection signal is transmitted to the processing system for processing. The trailer processing system controls the trailer according to the detection signal. The traction pin has a simple structure and can directly detect the traction between the main vehicle and the tractor without the need for other auxiliary equipment for detection, thus saving the operating cost.

[0006] In one of the embodiments, a temperature compensation sheet is disposed in another accommodating space of the traction force detection structure. The temperature compensation sheet is attached to another side end of the elastic body. The temperature compensation sheet is used to perform temperature compensation on the strain gauge.

[0007] In one of the embodiments, a traction disk is provided at one end of the traction pin of the traction force detection structure, and the traction disk is provided with a plurality of connection holes for fixing to the trailer along the circumferential direction.

[0008] In one of the embodiments, the elastic body of the traction force detection structure is disposed close to the traction disk.

[0009] In one of the embodiments, a wire hole for communicating with the through hole is provided on the traction pin of the traction force detection structure, and the temperature compensation gauge and the strain gauge are connected by a cable, and the cable passes through the wire hole to communicate with the processing system.

[0010] In one of the embodiments, the strain gauge of the traction force detection structure is a double-bridge strain gauge.

[0011] In one of the embodiments, the elastic body of the traction force detection structure is a block structure.

[0012] The beneficial effects of this application are:

[0013] The present application provides a traction force detection structure, in which an elastic body is arranged in the traction pin of the traction force detection structure, and a strain gauge is attached to the side end of the elastic body. When the main vehicle pulls the trailer, the elastic body is deformed by force, and the strain gauge generates a detection signal, which is transmitted to the processing system, and the processing system controls the trailer according to the detection signal. The traction pin has a simple structure and can directly detect the traction between the main vehicle and the tractor without the aid of other auxiliary equipment. The setting of the strain gauge can detect the slight deformation of the elastic body, thereby improving the detection accuracy.

[0014] The traction force detection structure also adopts a temperature compensation sheet, which can compensate for the change in resistance of the strain gauge caused by temperature change. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 A schematic diagram of a traction force detection structure according to an embodiment of the present application from a first viewing angle;

[0016] Figure 2 A schematic diagram of a traction force detection structure according to an embodiment of the present application from a second viewing angle;

[0017] Figure 3 A schematic diagram of a traction force detection structure according to an embodiment of the present application from a third viewing angle;

[0018] in:

[0019] 1. traction pin; 11. through hole; 12. elastic body; 13. accommodating space; 14. traction plate; 15. connecting hole;

[0020] 16. Wire hole. DETAILED DESCRIPTION

[0021] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below with reference to the accompanying drawings.

[0022] like Figure 1 and Figure 3As shown, an embodiment of the present application provides a traction force detection structure, including a traction pin 1 detachably mounted on a saddle, the traction pin 1 having a through hole 11 radially opened therein, an elastomer 12 arranged in the through hole 11, the elastomer 12 and the traction pin 1 forming an integral structure, two accommodating spaces 13 are arranged between the two side ends of the elastomer 12 and the traction pin 1, a strain gauge is arranged in one of the accommodating spaces 13, the strain gauge is attached to one side end of the elastomer 12, and the strain gauge is used to communicate with the processing system.

[0023] Specifically, the traction pin 1 is fixedly connected to the trailer, and the saddle is fixedly connected to the main vehicle. When the locking mechanism on the saddle locks the traction pin 1, the main vehicle and the trailer are combined with each other. When the locking mechanism releases the traction pin 1, the main vehicle and the trailer are separated from each other. A through hole 11 is provided at a position of the traction pin 1 near the traction plate 14. The elastic body 12 vertically arranged in the through hole 11 is an integrated structure with the traction pin 1. Two accommodating spaces 13 are formed between the traction pin 1 and the elastic body 12. Strain gauges and temperature compensation gauges are respectively arranged in the accommodating spaces 13. The strain gauges and temperature compensation gauges are respectively attached to the two side ends of the elastic body 12. The strain gauges and the temperature compensation gauges are connected through lines, and the lines are connected to the processing system for communication. Among them, the processing system includes an operational amplifier circuit board and an electronic control system. The strain gauge is connected to the operational amplifier circuit board, and the circuit board is connected to the electronic control system. The circuit board collects the resistance change of the strain gauge, and then converts it into a traction force value, outputs it to the CAN network of the electronic control system, and allows the electronic control system to read and control the trailer.

[0024] When the main vehicle is pulling the trailer, the elastic body 12 in the towing pin 1 is deformed, and the strain gauge attached to the elastic body 12 generates a detection signal, which is transmitted to the processing system. The processing system controls the trailer according to the converted traction force value.

[0025] In the above structure, the traction force between the main vehicle and the trailer is detected by changing the structure of the traction pin 1 itself and cooperating with the strain gauge. The traction force detection structure can not only detect the traction force, but also has a simple structure and does not require auxiliary equipment for detection, saving costs and occupying space. Since the strain gauge has a particularly high resolution, it can detect a tiny deformation of the elastic body 12, and the setting has high accuracy.

[0026] like Figure 3 As shown, in one embodiment, a temperature compensation sheet is provided in another accommodating space 13 of the traction force detection structure. The temperature compensation sheet is attached to another side end of the elastic body 12, and the temperature compensation sheet is used to perform temperature compensation on the strain gauge.

[0027] Specifically, the temperature compensation sheet is attached to the other side end of the elastic body 12 and connected to the strain gauge circuit. The temperature compensation sheet can effectively compensate for the change in resistance of the strain gauge caused by temperature change.

[0028] like Figure 1 and Figure 2 As shown, in one of the embodiments, a traction disc 14 is provided at one end of the traction pin 1 of the traction force detection structure, and the traction disc 14 is provided with a plurality of connection holes 15 for fixing to the trailer along the circumferential direction.

[0029] Specifically, the traction disk 14 is provided with 8 connection holes 15 along the circumferential direction, and the 8 connection holes 15 are fixed to the trailer by 8 self-locking bolts. This arrangement facilitates fixing the traction pin 1 to the trailer.

[0030] like Figure 3 As shown, in one of the embodiments, the elastic body 12 of the traction force detection structure is disposed close to the traction disk 14 .

[0031] Specifically, when the main vehicle drives the trailer, the traction pin 1 is subjected to force, and the main force point is at the root of the traction pin 1, where deformation is most obvious, and the root is close to the traction plate 14. Therefore, the position of the elastic body 12 is conducive to improving the detection accuracy of the strain gauge.

[0032] like Figure 1 and Figure 2 As shown, in one embodiment, a wire hole 16 for communicating with the through hole 11 is provided on the traction pin 1 of the traction force detection structure, and the temperature compensation gauge and the strain gauge are connected by a cable, and the cable passes through the wire hole 16 to communicate with the processing system.

[0033] Specifically, the cables are connected to the temperature compensation sheet and the strain gauge respectively, and then pass through the wire hole 16 to communicate with the processing system. The setting of the wire hole 16 can effectively prevent the cable from being squeezed by components and causing damage, thereby extending the service life of the cable.

[0034] like Figure 3 As shown, in one embodiment, the strain gauge of the traction force detection structure is a double-bridge strain gauge. The use of a double-bridge strain gauge can improve the detection efficiency.

[0035] like Figure 3 As shown, in one embodiment, the elastic body 12 of the traction force detection structure is a block structure. The elastic body 12 is a rectangular block structure, and the two side ends of the structure are flat structures, which can be easily and reliably attached to the strain gauge and the temperature compensation sheet. When the elastic body 12 is deformed, the block structure can facilitate the strain gauge to detect the deformation within the maximum range, thereby improving the detection accuracy.

[0036] The above-mentioned embodiments only express several implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. A traction force detection structure, characterized in that: The invention comprises a traction pin (1) which can be detachably mounted on a saddle, wherein the traction pin (1) is provided with a through hole (11) in a radial direction, an elastic body (12) is vertically arranged in the through hole (11), the elastic body (12) and the traction pin (1) are an integrated structure, two accommodating spaces (13) are arranged between the two side ends of the elastic body (12) and the traction pin (1), a strain gauge is arranged in one of the accommodating spaces (13), the strain gauge is attached to one side end of the elastic body (12), and the strain gauge is used for communication connection with a processing system.

2. The traction force detection structure according to claim 1, characterized in that: A temperature compensation sheet is arranged in the other accommodating space (13), and the temperature compensation sheet is attached to the other side end of the elastic body (12). The temperature compensation sheet is used to perform temperature compensation on the strain gauge.

3. The traction force detection structure according to claim 1, characterized in that: A traction disc (14) is provided at one end of the traction pin (1), and the traction disc (14) is provided with a plurality of connection holes (15) for fixing to a trailer along the circumferential direction.

4. The traction force detection structure according to claim 3, characterized in that: The elastic body (12) is arranged close to the traction disk (14).

5. The traction force detection structure according to claim 2, characterized in that: The traction pin (1) is provided with a wire hole (16) for communicating with the through hole (11); the temperature compensation gauge and the strain gauge are connected via a cable, and the cable passes through the wire hole (16) to communicate with the processing system.

6. The traction force detection structure according to claim 1, characterized in that: The strain gauge is a double-bridge strain gauge.

7. The traction force detection structure according to claim 1, characterized in that: The elastic body (12) is a block structure.

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