CN-115432063-B - Semi-trailer main and follow-up steering system

CN115432063BCN 115432063 BCN115432063 BCN 115432063BCN-115432063-B

Abstract

The invention discloses a novel semitrailer main body and a follow-up steering system, which comprises a front steering mechanism arranged at the front end of a semitrailer frame, a hydraulic driving system arranged at the middle section of the semitrailer frame, a rear steering mechanism arranged at the rear wheels of the semitrailer and a steering remote controller arranged in a tractor cab, wherein the front steering mechanism and the rear steering mechanism are both connected with the hydraulic driving system, and the hydraulic driving system is in communication connection with the steering remote controller. The invention has the advantages that the rear wheels can synchronously follow-up steering of the front tractor and can independently and actively steer under the control of the remote controller, the turning radius of the train can be greatly reduced, the steering can be realized in a smaller space, the adaptability of the vehicle can be improved, the abrasion of tires can be reduced, and the running smoothness of the vehicle can be improved.

Inventors

ZHU QIULIN
HUANG HUANG
YANG WUHONG
PANG JIAN
Su jinzhou

Assignees

中国重汽集团湖北华威专用汽车有限公司

Dates

Publication Date: 20260505
Application Date: 20220914

Claims (4)

1. A semi-trailer main and follow-up steering system is characterized by comprising a front steering mechanism (4) arranged at the front end of a semi-trailer frame (1), a hydraulic driving system (6) arranged at the middle section of the semi-trailer frame (1), a rear steering mechanism (5) arranged at the rear wheels (3) of the semi-trailer and a steering remote controller arranged in a tractor cab, wherein the front steering mechanism (4) and the rear steering mechanism (5) are connected with the hydraulic driving system (6), the hydraulic driving system (6) is in communication connection with the steering remote controller, and when the semi-trailer main and follow-up steering system is in operation, the front steering mechanism (4) and the rear steering mechanism (5) can synchronously follow-up steering along with the front tractor and independently and actively steer under the control of the steering remote controller; The front steering mechanism (4) comprises an active steering swing arm (41), a left active steering oil cylinder (42), a right active steering oil cylinder (43), an active swing arm shaft (44) and an active steering swing arm wedge block (45); the active steering swing arm (41) is arranged on the semi-trailer frame (1) through an active swing arm shaft (44) and is positioned above the traction pin (2), and the traction pin (2) is arranged at the front lower end of the semi-trailer frame (1) and is arranged opposite to the active swing arm shaft (44) up and down in a coaxial line; The left active steering oil cylinder (42) and the right active steering oil cylinder (43) are symmetrically arranged on the left side and the right side of the active steering swing arm (41) and are connected with the hydraulic driving system (6), the large-diameter ends of the left active steering oil cylinder (42) and the right active steering oil cylinder (43) are hinged with the semi-trailer frame (1), and the small-diameter ends are hinged with the front end of the active steering swing arm (41); the active steering swing arm wedge block (45) is arranged at the rear lower end of the active steering swing arm (41) and is used for being connected with a traction disc wedge opening of a tractor in an adaptive manner; each rear steering mechanism (5) comprises a wheel shaft (51), two wheel hinge shafts (52), two wheel steering swing rods (53), a left wheel steering oil cylinder (54) and a right wheel steering oil cylinder (55); the wheel shafts (51) are arranged between a group of left and right opposite semitrailer rear wheels (3) corresponding to the wheel shafts, and the left and right ends of the wheel shafts are hinged with a group of left and right opposite semitrailer rear wheels (3) corresponding to the wheel shafts through a wheel hinge shaft (52); the left wheel steering oil cylinder (54) and the right wheel steering oil cylinder (55) are arranged on one side of the wheel shaft (51) and are connected with the hydraulic driving system (6), the large-diameter ends of the left wheel steering oil cylinder (54) and the right wheel steering oil cylinder (55) are hinged with the middle part of the wheel shaft (51), and the small-diameter ends are hinged with a group of left and right opposite semitrailer rear wheels (3) corresponding to the small-diameter ends through a wheel steering swing rod (53); The two hinge points of the left active steering oil cylinder (42) and the right active steering oil cylinder (43) respectively form a first dynamic triangle (P) with the active steering swing arm (41); Two hinge points of a left wheel steering oil cylinder (54) and a right wheel steering oil cylinder (55) in each rear steering mechanism (5) and a corresponding wheel shaft (51) form a second dynamic triangle (Q); the first dynamic triangle (P) and the second dynamic triangle (Q) are similar triangles.
2. The semi-trailer owner, follow-up steering system according to claim 1, wherein the number of the rear steering mechanisms (5) is equal to the number of the rear wheels (3) of the semi-trailer, and each rear steering mechanism (5) is correspondingly arranged between a group of left and right opposite rear wheels (3) of the semi-trailer and is connected with the hydraulic driving system (6).
3. The semi-trailer main and follow-up steering system according to claim 1, wherein the hydraulic driving system (6) comprises an electric driving hydraulic pump (61), a multi-path electromagnetic hydraulic valve group (62) and a hydraulic oil tank (63), the electric driving hydraulic pump (61) is respectively connected with the multi-path electromagnetic hydraulic valve group (62) and the hydraulic oil tank (63), and the multi-path electromagnetic hydraulic valve group (62) is respectively connected with the hydraulic oil tank (63), a left active steering oil cylinder (42), a right active steering oil cylinder (43) of the front steering mechanism (4) and a left wheel steering oil cylinder (54) and a right wheel steering oil cylinder (55) of each rear steering mechanism (5).
4. The semi-trailer main and follow-up steering system according to claim 3, wherein the multi-path electromagnetic hydraulic valve group (62) is formed by combining four two-position two-way electromagnetic hydraulic valves (621) and two three-position four-way electromagnetic hydraulic reversing valves (622); The oil inlets of the four two-position two-way electromagnetic hydraulic valves (621) are sequentially communicated with the rod cavity and the rodless cavity of the left active steering cylinder (42) and the rod cavity and the rodless cavity of the right active steering cylinder (43), and the oil return port is communicated with the hydraulic oil tank (63), wherein the oil outlet of one two-position two-way electromagnetic hydraulic valve (621) communicated with the rod cavity of the left active steering cylinder (42) is communicated with the rod cavity of the right wheel steering cylinder (55) in each rear steering mechanism (5), the oil outlet of one two-position two-way electromagnetic hydraulic valve (621) communicated with the rodless cavity of the left active steering cylinder (42) is communicated with the rodless cavity of the right wheel steering cylinder (55) in each rear steering mechanism (5), and the oil outlet of one two-position two-way electromagnetic hydraulic valve (621) communicated with the rod cavity of the right active steering cylinder (43) is communicated with the rod cavity of the left wheel steering cylinder (54) in each rear steering mechanism (5); The left wheel steering oil cylinder (54) in each rear steering mechanism (5) is correspondingly communicated with the electric drive hydraulic pump (61) and the hydraulic oil tank (63) through one of the three-position four-way electromagnetic hydraulic reversing valves (622); The right wheel steering cylinder (55) in each rear steering mechanism (5) is correspondingly communicated with the electric drive hydraulic pump (61) and the hydraulic oil tank (63) through the other three-position four-way electromagnetic hydraulic reversing valve (622); each two-position two-way electromagnetic hydraulic valve (621) and each three-position four-way electromagnetic hydraulic reversing valve (622) are connected with the steering remote controller through wireless communication.

Description

Semi-trailer main and follow-up steering system Technical Field The invention relates to the technical field of semitrailer steering, in particular to a semitrailer main and follow-up steering system. Background The traditional semitrailer is mainly passively steered, namely, the tractor is used for pulling the semitrailer to forcibly steer, and the steering mode generally has more defects such as large tire abrasion and abrasion blocks of the semitrailer, large turning radius, incapability of steering in a narrow area and poor driving smoothness. Disclosure of Invention The invention aims to provide a semi-trailer main and follow-up steering system which is used for solving the defects of a traditional semi-trailer passive steering mode in the background technology. In order to achieve the above purpose, the technical scheme adopted by the invention is as follows: A semi-trailer main body and a follow-up steering system comprise a front steering mechanism arranged on the front end of a semi-trailer frame, a hydraulic driving system arranged on the middle section of the semi-trailer frame, a rear steering mechanism arranged at the rear wheels of the semi-trailer and a steering remote controller arranged in a tractor cab, wherein the front steering mechanism and the rear steering mechanism are connected with the hydraulic driving system, the hydraulic driving system is in communication connection with the steering remote controller, and when the semi-trailer main body is in operation, the front steering mechanism and the rear steering mechanism can synchronously follow-up steering along with the front tractor and can independently and actively steer under the control of the steering remote controller. Further, the front steering mechanism comprises an active steering swing arm, a left active steering oil cylinder, a right active steering oil cylinder, an active swing arm shaft and an active steering swing arm wedge block; The active steering swing arm is arranged on the semi-trailer frame through an active swing arm shaft and is positioned above the traction pin, and the traction pin is arranged at the front lower end of the semi-trailer frame and is arranged opposite to the active swing arm shaft up and down in a coaxial line; the left active steering oil cylinder and the right active steering oil cylinder are symmetrically arranged on the left side and the right side of the active steering swing arm respectively, are connected with the hydraulic driving system, and the large-diameter ends of the left active steering oil cylinder and the right active steering oil cylinder are hinged with the semi-trailer frame, and the small-diameter ends are hinged with the front end of the active steering swing arm; The driving steering swing arm wedge block is arranged at the rear lower end of the driving steering swing arm and is used for being connected with a traction disc wedge opening of a tractor in an adaptive manner. Further, the number of the rear steering mechanisms is equal to that of the rear wheels of the semi-trailer, and each rear steering mechanism is correspondingly arranged between a group of left and right opposite rear wheels of the semi-trailer and is connected with the hydraulic driving system. Further, each rear steering mechanism comprises a wheel shaft, two wheel hinge shafts, two wheel steering swing rods, a left wheel steering oil cylinder and a right wheel steering oil cylinder; The wheel axles are arranged between a group of left and right opposite rear wheels of the semitrailer corresponding to the wheel axles, and the left and right ends of the wheel axles are respectively hinged with a group of left and right opposite rear wheels of the semitrailer corresponding to the wheel axles through a wheel hinge shaft; The left wheel steering oil cylinder and the right wheel steering oil cylinder are arranged on one side of the wheel shaft and are connected with the hydraulic driving system, the large-diameter ends of the left wheel steering oil cylinder and the right wheel steering oil cylinder are hinged with the middle part of the wheel shaft, and the small-diameter ends of the left wheel steering oil cylinder and the right wheel steering oil cylinder are hinged with a group of left and right opposite rear wheels of the semitrailer corresponding to the small-diameter ends of the left wheel steering oil cylinder and the right wheel steering oil cylinder through a wheel steering swing rod. Further, the hydraulic drive system comprises an electric drive hydraulic pump, a plurality of electromagnetic hydraulic valve groups and a hydraulic oil tank, wherein the electric drive hydraulic pump is respectively connected with the electromagnetic hydraulic valve groups and the hydraulic oil tank, and the electromagnetic hydraulic valve groups are respectively connected with the hydraulic oil tank, the left active steering oil cylinder and the right active steering oil cylinder of the front steering mechanis