CN111497990A

CN111497990A - Rear suspension assembly of three-wheeled electric vehicle

Info

Publication number: CN111497990A
Application number: CN202010459354.8A
Authority: CN
Inventors: 饶道龚; 杨三龙; 李乾; 林伟民
Original assignee: Research Institute of Zhejiang University Taizhou
Current assignee: Research Institute of Zhejiang University Taizhou
Priority date: 2020-05-27
Filing date: 2020-05-27
Publication date: 2020-08-07

Abstract

The invention discloses a rear suspension assembly of a three-wheeled electric vehicle, which comprises a rear axle frame and two swing arms symmetrically arranged at two sides of the rear axle frame, wherein rear wheels are respectively arranged on the two swing arms; the rear axle bridge is provided with a step shaft, the step shaft is parallel to the axis of the wheel shaft of the rear wheel, and each swing arm is rotatably sleeved on the step shaft; the two swing arms are provided with eccentric arms extending in opposite directions, the free ends of the two eccentric arms are respectively hinged with two pushing arms through first pivots, the free ends of the two pushing arms are connected to a second pivot, and the two ends of the second pivot are connected together through a rotating mechanism. The two swing arms respectively swing upwards and downwards relative to the rear axle frame under the combined action of the eccentric arm, the first pivot, the second pivot and the rotating mechanism, so that the axle shafts of two rear wheels can be completely parallel when the electric tricycle turns, the centrifugal force caused by turning is offset, and the driving safety is improved.

Description

Rear suspension assembly of three-wheeled electric vehicle

Technical Field

The invention belongs to the technical field of mechanical motion of electric vehicles, and particularly relates to a rear suspension assembly of a three-wheeled electric vehicle.

Background

The electric vehicle rear axle double-swing-arm suspension mechanism has few types in the market, and in order to further develop the company, the company conducts market research, determines to independently research and develop the electric vehicle rear axle double-swing-arm suspension mechanism, and can meet market demands and widen development roads of the company. By adopting an advanced mechanism, the independent innovation capability of the enterprise is further improved, the market competitiveness of the product is increased, and a new economic growth point is created for the enterprise. Through continuous technical transformation, not only is a new development opportunity brought to the enterprise, but also synchronous development of the industry can be driven, and powerful support is provided for national economy.

The existing double-swing-arm mechanism for the rear axle of the electric vehicle has the defects of unstable structure, short service life and low safety, so that the enterprise demands a new double-swing-arm suspension mechanism for the rear axle of the electric vehicle urgently.

Disclosure of Invention

Accordingly, the primary objective of the present invention is to solve the above problems and provide a rear suspension assembly for a three-wheeled electric vehicle.

In order to achieve the above purposes, the technical scheme adopted by the invention is to provide a rear suspension assembly of a three-wheeled electric vehicle, which comprises a rear axle frame and two swing arms symmetrically arranged at two sides of the rear axle frame, wherein rear wheels are respectively arranged on the two swing arms;

the rear axle bridge is provided with a step shaft, the step shaft is parallel to the axis of the wheel shaft of the rear wheel, and each swing arm is rotatably sleeved on the step shaft;

the two swing arms are provided with eccentric arms extending in opposite directions, the free ends of the two eccentric arms are respectively hinged with two pushing arms through a first pivot, the free ends of the two pushing arms are connected to a second pivot, and the two ends of the second pivot are connected together through a rotating mechanism; when the three-wheeled electric vehicle turns, the two pushing arms move forwards or backwards simultaneously, one of the swinging arms moves upwards relative to the rear axle frame around the step shaft, and the other swinging arm moves downwards relative to the rear axle frame around the step shaft.

The rotating mechanism comprises two first rotating arms and second rotating arms, the two first rotating arms are hinged to two ends of a second pivot through a third pivot, the second rotating arms are hinged to free ends of the two first rotating arms through fourth pivots respectively, and the free ends of the two second rotating arms are hinged to the rear axle frame through fifth pivots respectively; the axes of the third pivot, the fourth pivot and the fifth pivot are parallel, and the axes of the third pivot, the fourth pivot and the fifth pivot are vertical to the axes of the step shaft, the first pivot and the second pivot; when the electric tricycle turns, the second pivot moves back and forth, so that the first rotating arm is driven to rotate around the third pivot relative to the second pivot, the second rotating arm rotates around the fourth pivot relative to the first rotating arm, and the second rotating arm rotates around the fifth pivot relative to the rear axle frame.

The invention has the beneficial effects that:

according to the rear suspension assembly of the three-wheeled electric vehicle, the two swing arms respectively swing upwards and downwards relative to the rear axle frame under the combined action of the eccentric arm, the first pivot, the second pivot and the rotating mechanism, so that when the electric tricycle turns, axles of two rear wheels can be completely parallel, centrifugal force caused by turning is offset, and the driving safety is improved.

Drawings

FIG. 1 is a perspective view of one aspect of the present invention;

FIG. 2 is a cross-sectional view of the swing arm position of the present invention;

FIG. 3 is an exploded perspective view of a portion of the structure of the present invention;

FIG. 4 is a perspective view of one perspective of a portion of the structure of the present invention;

fig. 5 is a perspective view of another perspective of a portion of the structure of the present invention.

Detailed Description

The invention is described in further detail below with reference to the following figures and detailed description:

referring to fig. 1 to 5, the invention provides a rear suspension assembly of a three-wheeled electric vehicle, which comprises a rear axle frame 1 and two swing arms 2 symmetrically arranged at two sides of the rear axle frame 1, wherein rear wheels 3 are respectively mounted on the two swing arms 2;

the rear axle bridge 1 is provided with a step shaft 4, the step shaft 4 is parallel to the axis of a wheel shaft 5 of the rear wheel 3, and each swing arm 2 is rotatably sleeved on the step shaft 4;

the two swing arms 2 are provided with eccentric arms 6 extending in opposite directions, the free ends of the two eccentric arms 6 are respectively hinged with two pushing arms 8 through a first pivot 7, the free ends of the two pushing arms 8 are connected to a second pivot 9, and the two ends of the second pivot 9 are connected together through a rotating mechanism; when the three-wheeled electric vehicle turns, the two pushing arms 8 move forwards or backwards simultaneously, wherein one of the swinging arms 2 moves upwards around the step shaft 4 relative to the rear axle frame 1, and the other swinging arm 2 moves downwards around the step shaft 4 relative to the rear axle frame 1.

The rotating mechanism comprises two first rotating arms 11 which are hinged to two ends of a second pivot 9 through a third pivot 10, and second rotating arms 13 which are respectively hinged to free ends of the two first rotating arms 11 through fourth pivots 12, and the free ends of the two second rotating arms 13 are respectively hinged to the rear axle frame 1 through fifth pivots 14; the axes of the third pivot 10, the fourth pivot 12 and the fifth pivot 14 are parallel, and the axes of the third pivot 10, the fourth pivot 12 and the fifth pivot 14 are perpendicular to the axes of the step shaft 4, the first pivot 7 and the second pivot 9; when the electro-tricycle turns, the second pivot 9 moves back and forth, so that the first rotating arm 11 is driven to rotate around the third pivot 10 relative to the second pivot 9, the second rotating arm 13 rotates around the fourth pivot 12 relative to the first rotating arm 11, and the second rotating arm 13 rotates around the fifth pivot 14 relative to the rear axle frame 1.

The working principle of the three-wheeled electric vehicle of the invention is explained as follows:

when the tricycle turns, the second pivot 9 moves back and forth. When turning to the left, the left rear wheel 15 rises, and the opposite, right rear wheel 16 falls; when turning to the right, the right rear wheel 16 rises and the opposite left rear wheel 15 falls. Specifically, when the three-wheeled electric vehicle turns left, the left rear wheel 15 rises, so that the left oscillating arm 2 turns upwards around the step shaft 4, and then the eccentric arm 6 on the left oscillating arm 2 rotates around the step shaft 4 and has a forward displacement, and the forward displacement causes the two ends of the left pushing arm 8 to rotate around the first pivot 7 and the second pivot 9 respectively, and at the same time, the whole left pushing arm 8 has a tendency to move forward, and the left pushing arm 8 generates a forward displacement, so that the second pivot 9 has a forward displacement, and the two ends of the second pivot 9 are hinged to the rear axle frame 1 through the first rotating arm 11 and the second rotating arm 13 respectively, so that when the second pivot 9 moves forward, the right pushing arm 8 is driven to move forward, and then the eccentric arm 6 on the right oscillating arm 2 is driven to rotate around the step shaft 4, the rotating direction of the eccentric arm 6 on the swing arm 2 on the left side and the rotating direction of the eccentric arm are positive and negative, and finally the swing arm 2 on the right side is driven to downwards overturn around the step shaft 4, so that the right rear wheel 16 descends, the deflection motion of the two rear wheels 3 is completed, and when the electric tricycle turns, the gravity and the centrifugal force of a vehicle and a driver are counteracted, and the purpose of safe driving is achieved.

The rear suspension assembly of the three-wheeled electric vehicle provided by the embodiment of the invention is described in detail, a specific example is applied in the description to explain the principle and the implementation mode of the invention, and the description of the embodiment is only used for helping to understand the technical scheme disclosed by the invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation of the present invention.

Claims

1. The utility model provides a suspension assembly behind tricycle electric motor car which characterized in that: the rear wheel suspension mechanism comprises a rear axle frame and two swing arms symmetrically arranged on two sides of the rear axle frame, wherein rear wheels are respectively arranged on the two swing arms;

2. The three-wheeled electric vehicle rear suspension assembly according to claim 1, wherein: the rotating mechanism comprises two first rotating arms and second rotating arms, the two first rotating arms are hinged to two ends of a second pivot through a third pivot, the second rotating arms are hinged to free ends of the two first rotating arms through fourth pivots respectively, and the free ends of the two second rotating arms are hinged to the rear axle frame through fifth pivots respectively; the axes of the third pivot, the fourth pivot and the fifth pivot are parallel, and the axes of the third pivot, the fourth pivot and the fifth pivot are vertical to the axes of the step shaft, the first pivot and the second pivot; when the electric tricycle turns, the second pivot moves back and forth, so that the first rotating arm is driven to rotate around the third pivot relative to the second pivot, the second rotating arm rotates around the fourth pivot relative to the first rotating arm, and the second rotating arm rotates around the fifth pivot relative to the rear axle frame.