CN203818926U - Rear track adjusting device for electric cars - Google Patents

Abstract

The utility model relates to a rear wheelbase adjustment device for an electric vehicle, which comprises a motor connected with a vehicle-mounted ECU, a gear transmission device and a sliding device, the transmission shaft on the motor is connected with the gear transmission device, and the two ends of the gear transmission device are respectively arranged A worm is connected with a worm gear, and the worm gear is connected with a sliding device. According to the input of vehicle speed, current wheel base and steering signal, the utility model controls whether the motor works, the working time and the size of the rotation speed, so as to realize the change of the wheel base, the size of the change, the speed of the change, and prevent the small electric vehicle from turning at high speed. A rollover occurs, making driving safe and protecting the occupants.

Description

A device for adjusting the rear track of an electric vehicle

technical field

The utility model relates to an electric vehicle, in particular to a rear track adjusting device of the electric vehicle.

Background technique

With the development of the economy and the improvement of people's living standards, automobiles have become one of the important tools for people to travel. Current automobile research is all devoted to the improvement of the performance of aspects such as automobile acceleration, stability and off-road, and the wheelbase of most vehicles is all fixed. As a new type of vehicle, electric vehicles are different from traditional vehicles in that the power of electric vehicles is converted from electric energy instead of fuel, which is of great significance to environmental protection. come better. For scooters, the performance research of small electric vehicles is mostly the improvement of vehicle acceleration, stability and off-road performance, and the wheelbase of most vehicles is fixed. When driving, small electric vehicles are prone to rollover when turning at a high degree due to their small wheelbase and non-adjustable wheelbase, causing accidents and personal injuries.

Chinese Patent Announcement No. CN87213743U, the date of announcement was August 10, 1988, and the name is variable wheelbase type automobile. The end is fixed with a pressure transmission cylinder base, and the inner sleeve beam is fixed with a cylinder bracket. The cylinder body of the pressure transmission cylinder is installed on the cylinder base. One end of the cylinder push rod is connected with the piston, and the seal is in the cylinder body. The other end is installed on the cylinder bracket, and the pressure transmission cylinder pushes the inner sleeve beam out from the outer sleeve beam, thereby making the vehicle frame longer and changing the wheelbase. Its shortcoming is that the scheme is to change the wheelbase by changing the length of the car frame and the carriage, which is a large variable, and adopts a pressure transmission cylinder type force transmission device, which has a slow response speed and cannot meet the needs of small electric vehicles when turning at high speeds. requirements for immediate change.

Utility model content

The purpose of this utility model is to provide an electric vehicle with real-time adjustment of the wheelbase in order to solve the defects that the existing small electric vehicle has a small wheelbase and the wheelbase is not adjustable, which is prone to rollover during high-speed steering, causing accidents and personal injuries Rear track adjustment device.

In order to achieve the above object, the utility model adopts the following technical solutions:

A rear track adjustment device for an electric vehicle, comprising a motor connected to a vehicle-mounted ECU, a gear transmission and a sliding device, the drive shaft on the motor is connected to the gear transmission, and the two ends of the gear transmission are respectively provided with a worm and a worm wheel , the worm gear is connected with the sliding device. In this technical solution, the vehicle-mounted ECU calculates the required wheelbase in this state according to the vehicle speed signal, the wheelbase signal and the steering signal, and then compares the calculated wheelbase with the current one, and if it is smaller than the current one, adjust The signal is output to the motor, the motor starts to run, and the gear transmission is driven by the transmission shaft, the gear transmission drives the worm and the worm wheel, and the worm wheel drives the sliding device to adjust the wheelbase, so as to realize the purpose of adjusting the wheelbase in real time.

Preferably, the sliding device includes a chute and a slide rail movable left and right, and the worm wheel is connected with the slide rail. In the technical solution, the slide rail moves left and right in the slide groove, and the slide groove limits the degree of freedom of the slide rail to prevent the slide rail from moving too much.

Preferably, the upper end surface of the chute is fixed to the vehicle body through bolts, and the lower end surface of the slide rail is connected to the suspension system of the vehicle body. In the technical solution, the sliding of the slide rail drives the suspension system of the vehicle body to slide, so as to achieve the purpose of adjusting the rear track.

The beneficial effect of the utility model is that the utility model controls whether the motor works, the working time and the rotation speed according to the vehicle speed, the current wheel base and the input of the steering signal, so as to realize the change of the wheel base, the size of the change, the speed of the change, Prevent small electric vehicles from rolling over when turning at high speed, making driving safe and protecting people in the vehicle.

Description of drawings

Fig. 1 is a kind of structural representation of the utility model.

In the figure, 1. motor; 2. gear transmission; 3. worm; 4. worm wheel; 5. drive shaft; 6. chute; 7. slide rail.

Detailed ways

Below in conjunction with specific embodiment and accompanying drawing, the utility model is further explained:

With reference to Fig. 1, a kind of electric vehicle rear wheelbase adjusting device comprises the motor 1 that is connected with vehicle-mounted ECU, gear transmission 2 and sliding device, and transmission shaft 5 on the described motor 1 is connected with gear transmission 2, and gear transmission Two ends of 2 are provided with worm screw 3 and worm wheel 4 respectively, and worm wheel 4 is connected with sliding device. The sliding device includes a chute 6 and a slide rail 7 that can move left and right, and the worm wheel 4 is connected with the slide rail 7 . The upper end surface of the chute 6 is fixed with the vehicle body by bolts, and the lower end surface of the slide rail 7 is connected with the suspension system of the vehicle body.

The on-board ECU calculates the required wheelbase in this state according to the vehicle speed signal, wheelbase signal and steering signal, and then compares the calculated wheelbase with the current one. If it is smaller than the current one, the adjustment signal is output to the motor. Start to run, drive the gear transmission device through the transmission shaft, the gear transmission device drives the worm and the worm wheel, the worm wheel drives the slide rail to move left and right in the chute, the chute restricts the degree of freedom of the slide rail to prevent the slide rail from moving too much, and realize real-time adjustment The purpose of the track.

Claims (3)

1. A rear track adjustment device for an electric vehicle, characterized in that it comprises a motor (1) connected to the vehicle-mounted ECU, a gear transmission (2) and a sliding device, and the drive shaft (5) on the motor (1) It is connected with the gear transmission device (2), and the two ends of the gear transmission device (2) are respectively provided with a worm (3) and a worm wheel (4), and the worm wheel (4) is connected with the sliding device. 2. A rear wheelbase adjustment device for an electric vehicle according to claim 1, characterized in that the sliding device includes a chute (6) and a sliding rail (7) that can move left and right, the worm wheel (4) and the sliding rail ( 7) Connect. 3. A rear wheelbase adjustment device for an electric vehicle according to claim 1 or 2, characterized in that the upper end surface of the chute (6) is fixed to the vehicle body by bolts, and the lower end surface of the slide rail (7) is suspended from the vehicle body. rack system connection.