Shift-by-wire structure of special vehicle

Abstract

The utility model discloses a special vehicle drive-by-wire gear shifting structure, and relates to the technical field of drive-by-wire chassis reduction gearboxes. A displacement sensor, a reduction gearbox gear switching mechanism, a support, an electric push rod, a five-pin relay, a single-pole double-throw relay and a VCU are arranged on the surface of a reduction gearbox. According to the drive-by-wire gear shifting structure of the special vehicle, the fixed support, the electric push rod, the displacement sensor, the five-pin relay and the single-pole double-throw relay are additionally arranged, switching of the high gear and the low gear of the vehicle can be achieved through control of a VCU whole vehicle control system, a manual gear shifting mechanism of an original vehicle is reserved, and cost is saved; and potential safety hazards caused by manual misoperation are avoided, the success rate and stability of gear shifting are greatly improved under the condition of low cost, it is guaranteed that the vehicle can accurately complete gear shifting, manpower is saved, and the gear shifting efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of wire-controlled chassis reduction gears, and particularly relates to a wire-controlled shifting structure for special vehicles. Background Technique

[0002] The wire-controlled chassis technology (x-by-wire) refers to using electronic signals to replace traditional mechanical or hydraulic systems to control vehicles. This technology improves the vehicle's handling performance and response speed and is one of the key technologies for realizing autonomous driving.

[0003] At present, the existing high and low gear shifting can only rely entirely on manual operation. Shifting gears without knowing the current gear of the vehicle will not only cause the gears not to be shifted, but also pose a great safety hazard. Content of the Utility Model

[0004] Aiming at the deficiencies of the prior art, the utility model provides a wire-controlled shifting structure for special vehicles, which solves the problem that the existing high and low gear shifting can only rely entirely on manual operation. Shifting gears without knowing the current gear of the vehicle will not only cause the gears not to be shifted, but also pose a great safety hazard.

[0005] To achieve the above purposes, the utility model is realized through the following technical solutions: A wire-controlled shifting structure for special vehicles includes a reduction gearbox. An electric push rod, a five-pin relay, a single-pole double-throw relay, and a VCU are respectively arranged on the surface of the reduction gearbox. A displacement sensor and a bracket are arranged on the side of the reduction gearbox. A reduction gearbox gear shifting mechanism is arranged in the inner cavity of the reduction gearbox, and one end of the reduction gearbox gear shifting mechanism extends out of the side of the reduction gearbox. Among them, the VCU is the vehicle control system. By combining these several components, we replace the traditional manual shifting with wire-controlled shifting. Using this solution without moving the original vehicle shifting mechanism, it not only has strong adaptability but also completes the process from manual shifting to wire-controlled shifting in a short time at low cost. When the VCU vehicle control system receives a shifting request and judges the high and low gear signals, it controls the positive and negative output of the current by controlling the five-pin relay and the single-pole double-throw relay, and controls the electric push rod to push forward or backward. When the electric push rod is pushed to the specified position, the displacement sensor will send a signal to the VCU vehicle control system, and the VCU vehicle control system will control the five-pin relay and the single-pole double-throw relay to stop operating, so that the electric push rod stops operating and completes the entire wire-controlled shifting process.

[0006] Preferably, one end of the bracket is arranged on the surface of the reduction gearbox gear shifting mechanism, and the other end of the bracket is arranged on the output end of the electric push rod.

[0007] Preferably, the surface of the bracket is located in the inner cavity of the detection end of the displacement sensor.

[0008] Preferably, the bracket, the electric push rod, the five-pin relay, and the five-pin relay are all connected to the VCU through wires.

[0009] The utility model provides a wire-controlled shift structure for special vehicles. Compared with the prior art, it has the following beneficial effects:

[0010] 1. For the wire-controlled shift structure of the special vehicle, by borrowing the original vehicle's manual shift mechanism, the VCU vehicle control system, the five-pin relay, the single-pole double-throw relay, the electric push rod, and the displacement sensor, the assembly of the wire-controlled shift is saved, the cost is low, the installation is convenient, it is easy to adapt to various models with manual high and low gear switching, and the shift performance is strong.

[0011] 2. The wire-controlled shift structure of the special vehicle has a simple structure and strong stability, ensuring the stability and reliability of vehicle shifting in the case of wire-controlled shifting.

[0012] 3. The wire-controlled shift structure of the special vehicle has a simple structure, replaces the traditional manual shift, reduces the safety hazards brought by manual shift, and improves the success rate of shifting. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 is a schematic structural diagram of the utility model;

[0014] Figure 2 is a schematic diagram of the first process of the utility model;

[0015] Figure 3 is a schematic diagram of the second process of the utility model.

[0016] In the figure: 1. Reduction gearbox; 2. Displacement sensor; 3. Reduction gearbox gear shifting mechanism; 4. Bracket; 5. Electric push rod; 6. Five-pin relay; 7. Single-pole double-throw relay; 8. VCU. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0017] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present utility model.

[0018] Please refer to Figure 1, the present utility model provides a technical solution: a wire-controlled shift structure for special vehicles, including a reduction gearbox 1. An electric push rod 5, a five-pin relay 6, a single-pole double-throw relay 7 and a VCU8 are respectively arranged on the surface of the reduction gearbox 1. A displacement sensor 2 and a bracket 4 are arranged on the side surface of the reduction gearbox 1. A reduction gearbox gear shift mechanism 3 is arranged in the inner cavity of the reduction gearbox 1, and one end of the reduction gearbox gear shift mechanism 3 extends out of the side surface of the reduction gearbox 1. One end of the bracket 4 is arranged on the surface of the reduction gearbox gear shift mechanism 3, and the other end of the bracket 4 is arranged on the output end of the electric push rod 5. The surface of the bracket 4 is located in the detection end inner cavity of the displacement sensor 2. When the bracket 4 moves away, the displacement sensor 2 will sense it. The bracket 4, the electric push rod 5, the five-pin relay 6 and the five-pin relay 6 are all connected to the VCU8 through wires. Among them, the VCU8 is the Vehicle Control Unit vehicle control system, that is, the vehicle control unit, which is a part of the modern automotive electronic control system. It is a computer system responsible for monitoring and managing multiple subsystems of the vehicle to ensure the stability and performance of the vehicle. The VCU8 usually communicates with other electronic control units ECUs of the vehicle, such as the engine control unit ECU, the transmission control unit TCU and the brake control unit BCU, etc., to cooperate in managing all aspects of the vehicle. Embodiment 1

[0019] During specific operation, please refer to Figure 2 , when a special vehicle needs to shift to a high gear during the low gear process, an operator presses the shift switch to request a high gear shift. At this time, the VCU8 reads the shift request signal and judges the shift state through itself. When it judges it as a high gear signal, the VCU8 controls the five-pin relay 6 to supply power to the common pin of the single-pole double-throw relay 7 to make the electric push rod 5 push forward, thereby driving the bracket 4 to move. When the electric push rod 5 works to the specified position, the displacement sensor 2 will collect the signal that the electric push rod 5 reaches the specified position and feedback it to the VCU8. After receiving the signal feedback by the displacement sensor 2, the VCU8 will immediately stop controlling the five-pin relay 6 to make the electric push rod 5 stop acting, thereby changing the gear shift of the reduction gearbox gear shift mechanism 3 through the bracket 4 to complete the shift of the special vehicle from low gear to high gear. Embodiment 2

[0020] During specific operation, please refer to Figure 3When a special vehicle needs to shift to a low gear during the high gear operation, an operator presses the shift switch to request a low gear shift. At this time, the VCU8 reads the shift request signal and judges the shift state by itself. When it judges that it is a low gear signal, the VCU8 controls the five-pin relay 6 and the single-pole double-throw relay 7 to make the electric push rod 5 push back, driving the bracket 4 to move. When the electric push rod 5 works to the specified position, the displacement sensor 2 will collect the signal that the electric push rod 5 reaches the specified position and feedback it to the VCU8. After receiving the signal fed back by the displacement sensor 2, the VCU8 will immediately stop controlling the five-pin relay 6 and the single-pole double-throw relay 7 to make the electric push rod 5 stop moving, and change the shift of the speed reduction box gear shifting mechanism 3 through the bracket 4, thus completing the shift of the special vehicle from high gear to low gear.

[0021] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A special vehicle shift-by-wire structure, comprising a reduction gearbox (1), characterized in that: The surface of the reduction box (1) is respectively provided with an electric push rod (5), a five-pin relay (6), a single-pole double-throw relay (7) and a VCU (8), and the side of the reduction box (1) is provided with a displacement sensor (2) and a bracket (4), and the inner cavity of the reduction box (1) is provided with a reduction box gear switching mechanism (3), and one end of the reduction box gear switching mechanism (3) extends out of the side of the reduction box (1).

2. A special vehicle wire-controlled shifting structure according to claim 1, characterized in that: One end of the bracket (4) is arranged on the surface of the reduction gearbox gear switching mechanism (3), and the other end of the bracket (4) is arranged on the output end of the electric push rod (5).

3. A special vehicle shift-by-wire structure according to claim 1, characterized in that: The surface of the bracket (4) is located in the inner cavity of the detection end of the displacement sensor (2).

4. The special vehicle wire-controlled shifting structure according to claim 1, characterized in that: The bracket (4), the electric push rod (5), the five-pin relay (6) and the five-pin relay (6) are all connected to the VCU (8) via wires.

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