CN115432063A - Novel semitrailer main and follow-up steering system - Google Patents
Novel semitrailer main and follow-up steering system Download PDFInfo
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- CN115432063A CN115432063A CN202211112955.7A CN202211112955A CN115432063A CN 115432063 A CN115432063 A CN 115432063A CN 202211112955 A CN202211112955 A CN 202211112955A CN 115432063 A CN115432063 A CN 115432063A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D13/00—Steering specially adapted for trailers
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Abstract
The invention discloses a novel semitrailer main and follow-up steering system, which comprises a front steering mechanism arranged at the front end of a semitrailer frame, a hydraulic driving system arranged on the middle section of the semitrailer frame, a rear steering mechanism arranged at the rear wheel of a semitrailer and a steering remote controller arranged in a tractor cab, wherein the front steering mechanism is arranged on the front end of the semitrailer frame; the front steering mechanism and the rear steering mechanism are both connected with a 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 the front tractor to steer, and can independently steer actively 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 vehicle adaptability can be improved, the abrasion of tires can be reduced, and the running smoothness of the vehicle can be improved.
Description
Technical Field
The invention relates to the technical field of semitrailer steering, in particular to a novel semitrailer main and follow-up steering system.
Background
Most of traditional semitrailers are passively steered, namely, the tractor pulls the semitrailer to forcibly steer, and the steering mode usually has more defects, such as: the semi-trailer has large tire abrasion and abrasion blocks; the turning radius is large, and the steering cannot be carried out in a narrow area; the ride is poor.
Disclosure of Invention
The invention aims to provide a novel semitrailer main and follow-up steering system which is used for overcoming the defects of a traditional semitrailer passive steering mode in the background technology.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
a novel semi-trailer main and follow-up steering system comprises a front steering mechanism arranged at 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 wheel of a semi-trailer and a steering remote controller arranged in a tractor cab; the front steering mechanism and the rear steering mechanism are both connected with a hydraulic driving system, and the hydraulic driving system is in communication connection with a steering remote controller; when the steering device works, the front steering mechanism and the rear steering mechanism can synchronously follow the front tractor to steer and can independently and actively steer under the control of the steering remote controller.
Furthermore, 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 mounted on the frame of the semi-trailer through an active swing arm shaft and is positioned above the traction pin, and the traction pin is mounted at the front lower end of the frame of the semi-trailer and is arranged up and down oppositely in the same axial lead with the active swing arm shaft;
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 and are connected with the hydraulic driving system, the large-diameter ends of the left active steering oil cylinder and the right active steering oil cylinder are hinged with the semitrailer frame, and the small-diameter ends of the left active steering oil cylinder and the right active steering oil cylinder are hinged with the front end of the active steering swing arm;
the active steering swing arm wedge block is arranged at the rear lower end of the active steering swing arm and is used for being in adaptive connection with a traction disc wedge opening of a tractor.
Furthermore, the number of the rear steering mechanisms is equal to that of the rear wheels of the semitrailer, and each rear steering mechanism is correspondingly arranged between a group of left and right opposite rear wheels of the semitrailer and is connected with the hydraulic driving system.
Furthermore, 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 shafts are arranged between a group of left and right opposite rear wheels of the semitrailer, and the left and right ends of the wheel shafts are respectively hinged with a group of left and right opposite rear wheels of the semitrailer 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 to the middle 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 to a group of left and right opposite rear wheels of the semitrailer through a wheel steering swing rod respectively.
Furthermore, the hydraulic drive system contains electricity and drives hydraulic pump, multichannel electromagnetism hydraulic valve group and hydraulic tank, electricity drive hydraulic pump respectively with multichannel electromagnetism hydraulic valve group and hydraulic tank link to each other, multichannel electromagnetism hydraulic valve group respectively with hydraulic tank, preceding steering mechanism's left initiative steering cylinder, right initiative steering cylinder and every rear steering mechanism's left wheel steering cylinder, right wheel steering cylinder link to each other.
Furthermore, the multi-path electromagnetic hydraulic valve group is formed by combining four two-position two-way electromagnetic hydraulic valves and two three-position four-way electromagnetic hydraulic reversing valves;
oil inlets of the four two-position two-way electromagnetic hydraulic valves are sequentially communicated with a rod cavity and a rodless cavity of the left active steering oil cylinder and a rod cavity and a rodless cavity of the right active steering oil cylinder correspondingly, and oil return ports are communicated with a hydraulic oil tank correspondingly; the oil outlet of a two-position two-way electromagnetic hydraulic valve communicated with the rod cavity of the left active steering oil cylinder is correspondingly communicated with the rod cavity of the right wheel steering oil cylinder in each rear steering mechanism; an oil outlet of a two-position two-way electromagnetic hydraulic valve communicated with a rodless cavity of the left active steering oil cylinder is correspondingly communicated with a rodless cavity of a steering oil cylinder of a right wheel in each rear steering mechanism (5); an oil outlet of a two-position two-way electromagnetic hydraulic valve communicated with a rod cavity of the right active steering oil cylinder is correspondingly communicated with a rod cavity of a left wheel steering oil cylinder in each rear steering mechanism; an oil outlet of a two-position two-way electromagnetic hydraulic valve communicated with a rodless cavity of the right driving steering oil cylinder is correspondingly communicated with a rodless cavity of a left wheel steering oil cylinder in each rear steering mechanism);
the left wheel steering oil cylinder in each rear steering mechanism is correspondingly communicated with the electrically-driven hydraulic pump and the hydraulic oil tank through one of the three-position four-way electromagnetic hydraulic reversing valves;
the right wheel steering oil cylinder in each rear steering mechanism is correspondingly communicated with the electrically-driven hydraulic pump and the hydraulic oil tank through another three-position four-way electromagnetic hydraulic directional valve;
and each two-position two-way electromagnetic hydraulic valve and each three-position four-way electromagnetic hydraulic reversing valve are connected with the steering remote controller through wireless communication.
Furthermore, two hinge points of the left active steering oil cylinder and the right active steering oil cylinder respectively form a first dynamic triangle with the active steering swing arm;
two hinge points of a left wheel steering oil cylinder and a right wheel steering oil cylinder in each rear steering mechanism respectively form a second dynamic triangle with corresponding wheel shafts;
the first dynamic triangle and the second dynamic triangle are similar triangles.
Compared with the prior art, the invention has the advantages that: 1) The rear wheels can synchronously follow the front tractor to steer, and can independently and actively steer under the control of the remote controller; 2) The turning radius of the train can be greatly reduced, the steering can be realized in a smaller space, the adaptability of the train can be improved, the abrasion of tires can be reduced, and the running smoothness of the train can be improved.
Drawings
FIG. 1 is an assembly relationship diagram of a semitrailer owner, a follow-up steering system and a semitrailer in a side view direction;
FIG. 2 is a view of the assembly relationship of the semitrailer owner, the follow-up steering system and the semitrailer in a top view direction according to the present invention;
FIG. 3 is an enlarged view of a portion of FIG. 1;
FIG. 4 is a schematic view of a dynamic triangle formed by two hinge points of a left active steering cylinder and an active swing arm shaft;
FIG. 5 is a schematic view of a dynamic triangle formed by two hinge points of a left wheel steering cylinder and a wheel axle;
FIG. 6 is a schematic diagram of the connection of the active steering cylinder, the wheel steering cylinder and the hydraulic drive system;
description of reference numerals: 1. a frame; 2. a tow pin; 3. a rear wheel; 4. a front steering mechanism; 41. an active steering swing arm; 42. a left active steering cylinder; 43. a right active steering cylinder; 44. an active swing arm shaft; 45. the active steering swing arm wedge block; 5. a rear steering mechanism; 51. a wheel shaft; 52. a wheel hinge shaft; 53. a wheel steering swing rod; 54. a left wheel steering cylinder; 55. a right wheel steering cylinder; 6. a hydraulic drive system; 61. an electrically driven hydraulic pump; 62. a plurality of electromagnetic hydraulic valve banks; 621. a two-position two-way electromagnetic hydraulic valve; 622. a three-position four-way electromagnetic hydraulic directional valve; 63. and a hydraulic oil tank.
Detailed Description
In order to make the technical means, the creation features, the achievement purposes and the effects of the invention easy to understand, the following description further explains how the invention is implemented by combining the attached drawings and the detailed implementation modes.
Referring to fig. 1 to 6, the novel main and follow-up steering system of the semitrailer provided by the invention comprises a front steering mechanism 4 arranged at the front end of a semitrailer frame 1, a hydraulic driving system 6 arranged at the middle section of the semitrailer frame 1, a rear steering mechanism 5 arranged at the rear wheel 3 of the semitrailer and a steering remote controller arranged in a tractor cab; the front steering mechanism 4 and the rear steering mechanism 5 are both connected with a hydraulic driving system 6, and the hydraulic driving system 6 is in communication connection with a steering remote controller; when the steering device works, the front steering mechanism 4 and the rear steering mechanism 5 can synchronously follow the front tractor to steer and can independently and actively steer under the control of the steering remote controller.
Specifically, in the present invention, the front steering mechanism 4 comprises an active steering swing arm 41, a left active steering cylinder 42, a right active steering cylinder 43, an active swing arm shaft 44 and an active steering swing arm wedge 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 up and down oppositely in the same axial lead with the active swing arm shaft 44; 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 respectively 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 in adaptive connection with a traction disc wedge of a tractor.
Specifically, in the present invention, the number of the rear steering mechanisms 5 is equal to the number of the rear wheels 3 of the semitrailer, and each rear steering mechanism 5 is correspondingly arranged between a set of left and right opposite rear wheels 3 of the semitrailer and is connected with the hydraulic drive system 6. More specifically, each rear steering mechanism 5 includes a wheel shaft 51, two wheel hinge shafts 52, two wheel steering swing rods 53, a left wheel steering cylinder 54 and a right wheel steering cylinder 55; the wheel shaft 51 is arranged between a group of left and right opposite rear wheels 3 of the semitrailer, and the left and right ends of the wheel shaft are hinged with the corresponding group of left and right opposite rear wheels 3 of the semitrailer through a wheel hinge shaft 52; the left wheel steering oil cylinder 54 and the right wheel steering oil cylinder 55 are both arranged on one side of the wheel shaft 51 and are both 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 both hinged with the middle part of the wheel shaft 51, and the small-diameter ends are respectively hinged with a group of left and right opposite semitrailer rear wheels 3 through a wheel steering swing rod 53.
Specifically, in the present invention, the hydraulic driving system 6 includes an electrically driven hydraulic pump 61, a multi-path electromagnetic hydraulic valve set 62 and a hydraulic oil tank 63, the electrically driven hydraulic pump 61 is respectively connected to the multi-path electromagnetic hydraulic valve set 62 and the hydraulic oil tank 63, and the multi-path electromagnetic hydraulic valve set 62 is respectively connected to the hydraulic oil tank 63, the left active steering cylinder 42 and the right active steering cylinder 43 of the front steering mechanism 4, and the left wheel steering cylinder 54 and the right wheel steering cylinder 55 of each rear steering mechanism 5.
More specifically, the multi-path electromagnetic hydraulic valve bank 62 is formed by combining four two-position two-way electromagnetic hydraulic valves 621 and two three-position four-way electromagnetic hydraulic directional valves 622; oil inlets of the four two-position two-way electromagnetic hydraulic valves 621 are sequentially and correspondingly communicated with a rod cavity and a rodless cavity of the left active steering oil cylinder 42 and a rod cavity and a rodless cavity of the right active steering oil cylinder 43, and oil return ports of the four two-position two-way electromagnetic hydraulic valves 621 are correspondingly communicated with the hydraulic oil tank 63; wherein, the oil outlet of a two-position two-way electromagnetic hydraulic valve 621 communicated with the rod cavity of the left active steering oil cylinder 42 is correspondingly communicated with the rod cavity of the right wheel steering oil cylinder 55 in each rear steering mechanism 5; an oil outlet of a two-position two-way electromagnetic hydraulic valve 621 communicated with a rodless cavity of the left active steering oil cylinder 42 is correspondingly communicated with a rodless cavity of a right wheel steering oil cylinder 55 in each rear steering mechanism 5; an oil outlet of a two-position two-way electromagnetic hydraulic valve 621 communicated with a rod cavity of the right driving steering oil cylinder 43 is correspondingly communicated with a rod cavity of the left wheel steering oil cylinder 54 in each rear steering mechanism 5; an oil outlet of a two-position two-way electromagnetic hydraulic valve 621 communicated with a rodless cavity of the right driving steering oil cylinder 43 is correspondingly communicated with a rodless cavity of the left wheel steering oil 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 driving hydraulic pump 61 and the hydraulic oil tank 63 through one of the three-position four-way electromagnetic hydraulic directional valves 622; the right wheel steering oil cylinder 55 in each rear steering mechanism 5 is correspondingly communicated with the electric driving hydraulic pump 61 and the hydraulic oil tank 63 through another three-position four-way electromagnetic hydraulic directional valve 622; and each two-position two-way electromagnetic hydraulic valve 621 and the three-position four-way electromagnetic hydraulic directional valve 622 are connected with the steering remote controller through wireless communication and are used for working under the control of the steering remote controller.
When in use, when the two-position two-way electromagnetic hydraulic valve 621 communicated with the rodless cavity of the left active steering oil cylinder 42 loses power, the rodless cavity of the left active steering oil cylinder 42 is communicated with the rodless cavity of the right wheel steering oil cylinder 55 and is disconnected with the hydraulic oil tank 63;
when the two-position two-way electromagnetic hydraulic valve 621 communicated with the rodless cavity of the left active steering oil cylinder 42 is electrified, the rodless cavity of the left active steering oil cylinder 42 is disconnected with the rodless cavity of the right wheel steering oil cylinder 55 and is communicated with the hydraulic oil tank 63;
when the two-position two-way electromagnetic hydraulic valve 621 communicated with the rod cavity of the left active steering oil cylinder 42 is powered off, the rod cavity of the left active steering oil cylinder 42 is communicated with the rod cavity of the right wheel steering oil cylinder 55 and is disconnected with the hydraulic oil tank 63;
when the two-position two-way electromagnetic hydraulic valve 621 communicated with the rod cavity of the left active steering oil cylinder 42 is electrified, the rod cavity of the left active steering oil cylinder 42 is disconnected with the rod cavity of the right wheel steering oil cylinder 55 and is communicated with the hydraulic oil tank 63;
when the two-position two-way electromagnetic hydraulic valve 621 communicated with the rodless cavity of the right active steering oil cylinder 43 is powered off, the rodless cavity of the right active steering oil cylinder 43 is communicated with the rodless cavity of the left wheel steering oil cylinder 54 and disconnected with the hydraulic oil tank 63;
when the two-position two-way electromagnetic hydraulic valve 621 communicated with the rodless cavity of the right active steering oil cylinder 43 is electrified, the rodless cavity of the right active steering oil cylinder 43 is disconnected with the rodless cavity of the left wheel steering oil cylinder 54 and is communicated with the hydraulic oil tank 63;
when the two-position two-way electromagnetic hydraulic valve 621 communicated with the rod cavity of the right active steering oil cylinder 43 is powered off, the rod cavity of the right active steering oil cylinder 43 is communicated with the rod cavity of the left wheel steering oil cylinder 54 and disconnected with the hydraulic oil tank 63;
when the two-position two-way electromagnetic hydraulic valve 621 communicated with the rod cavity of the right active steering oil cylinder 43 is electrified, the rod cavity of the right active steering oil cylinder 43 is disconnected with the rod cavity of the left wheel steering oil cylinder 54 and is communicated with the hydraulic oil tank 63;
when the three-position four-way electromagnetic hydraulic reversing valve 622 communicated with the left wheel steering oil cylinder 54 is powered off, the left wheel steering oil cylinder 54 is disconnected with the electrically-driven hydraulic pump 61 and the hydraulic oil tank 63;
when the three-position four-way electromagnetic hydraulic directional valve 622 communicated with the left wheel steering oil cylinder 54 is electrified and is reversed to the left, the rod cavity of the left wheel steering oil cylinder 54 is communicated with the electric driving hydraulic pump 61, and the rodless cavity is communicated with the hydraulic oil tank 63;
when the three-position four-way electromagnetic hydraulic directional valve 622 communicated with the left wheel steering oil cylinder 54 is electrified and is directionally changed, the rod cavity of the left wheel steering oil cylinder 54 is communicated with the hydraulic oil tank 63, and the rodless cavity is communicated with the electrically-driven hydraulic pump 61;
when the three-position four-way electromagnetic hydraulic reversing valve 622 communicated with the right wheel steering oil cylinder 55 is powered off, the right wheel steering oil cylinder 55 is disconnected with the electrically-driven hydraulic pump 61 and the hydraulic oil tank 63;
when the three-position four-way electromagnetic hydraulic directional valve 622 communicated with the right wheel steering oil cylinder 55 is electrified and is reversed to the left, the rod cavity of the right wheel steering oil cylinder 55 is communicated with the electrically-driven hydraulic pump 61, and the rodless cavity is communicated with the hydraulic oil tank 63;
when the three-position four-way electromagnetic hydraulic directional valve 622 communicated with the right wheel steering oil cylinder 55 is electrified to be directionally changed to the right, the rod cavity of the right wheel steering oil cylinder 55 is communicated with the hydraulic oil tank 63, and the rodless cavity is communicated with the electrically-driven hydraulic pump 61.
Specifically, in the present invention, two hinge points of the left active steering cylinder 42 and the right active steering cylinder 43 in the front steering mechanism 4 respectively form a first dynamic triangle P with the active steering swing arm 41; two hinge points of a left wheel steering cylinder 54 and a right wheel steering cylinder 55 in each rear steering mechanism 5 respectively form a second dynamic triangle Q with the corresponding wheel shaft 51; wherein, the first dynamic triangle P and the second dynamic triangle Q are similar triangles at any time. Because the two triangles are similar triangles, the corner of the rear wheel of the semitrailer is ensured to be consistent with the corner of the tractor all the time.
Specifically, in the present invention, the left active steering cylinder 42 in the front steering mechanism 4 and the right wheel steering cylinder 55 in the rear steering mechanism 5, and the right active steering cylinder 43 in the front steering mechanism 4 and the left wheel steering cylinder 54 in the rear steering mechanism 5 each satisfy the following relationships:
suppose that: the shortest center distance of two hinge shafts of the left (or right) active steering oil cylinder 42 (or 43) is L1, the maximum stroke is S1, the cross-sectional area of the rodless cavity is phi 1, and the cross-sectional area of the rod cavity is phi 1'; the shortest center distance of two hinge shafts of the steering oil cylinder 55 (or 54) of the right (or left) wheel is L2, the maximum stroke is S2, the cross-sectional area of the rodless cavity is phi 2, and the cross-sectional area of the rod cavity is phi 2'; the number of wheel axles of the semitrailer is n; then there are: S1/L1= S2/L2; s1 + Φ 1=s2 + Φ 2 + n; s1 + Φ 1'= S2 + Φ 2' × n.
Specifically, in a normal state, each two-position two-way electromagnetic hydraulic valve 621 and three-position four-way electromagnetic hydraulic directional valve 622 in the multi-path electromagnetic hydraulic valve bank 62 are in a power-off state, and the semitrailer at this time is in a follow-up steering state, that is, the front steering mechanism 4 and the rear steering mechanism 5 on the semitrailer frame 1 are synchronously steered with the tractor in front in a follow-up manner.
When the semitrailer needs to steer actively, the semitrailer needs to be steered by operating a steering remote controller in a cab of the tractor, specifically, the direction (such as left steering or right steering) needing to be steered is selected according to actual needs, then the corresponding two-position two-way electromagnetic hydraulic valve 621 in the multi-way electromagnetic hydraulic valve bank 62 is controlled to be powered by the steering remote controller, the corresponding active steering oil cylinder is disconnected from the wheel steering oil cylinder and communicated with the hydraulic oil tank 63, then the corresponding three-position four-way electromagnetic hydraulic directional valve 622 in the multi-way electromagnetic hydraulic valve bank 62 is controlled to be powered for steering by the steering remote controller, and meanwhile, the electrically-driven hydraulic pump 61 is controlled to be started by the steering remote controller, so that the electrically-driven hydraulic pump 61 transmits hydraulic oil in the hydraulic oil tank 63 to the corresponding wheel steering oil cylinder through the corresponding three-position electromagnetic hydraulic directional valve 622 to drive the wheel steering oil cylinder to extend or contract, so as to drive the rear wheels 3 of the semitrailer to make corresponding active steering action, and realize the active steering of the semitrailer.
Finally, the above description is only an embodiment of the present invention, and is not intended to limit the scope of the present invention, and all equivalent structures or equivalent processes performed by the present invention or directly or indirectly applied to other related technical fields by using the contents of the present specification and the accompanying drawings are included in the scope of the present invention.
Claims (7)
1. The utility model provides a novel semitrailer owner, follow-up a steering system which characterized in that: comprises a front steering mechanism (4) arranged on the front end of a semitrailer frame (1), a hydraulic driving system (6) arranged on the middle section of the semitrailer frame (1), a rear steering mechanism (5) arranged at the rear wheels (3) of the semitrailer and a steering remote controller arranged in a tractor cab; the front steering mechanism (4) and the rear steering mechanism (5) are connected with a hydraulic driving system (6), and the hydraulic driving system (6) is in communication connection with a steering remote controller; when the tractor works, the front steering mechanism (4) and the rear steering mechanism (5) can synchronously follow the front tractor to steer and can independently and actively steer under the control of the steering remote controller.
2. The novel semi-trailer main and follow-up steering system according to claim 1, characterized in that: 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 up and down oppositely in the same axial line with the active swing arm shaft (44);
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) respectively 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 semitrailer 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 of a tractor in an adaptive mode.
3. The novel semi-trailer main and follow-up steering system according to claim 2, characterized in that: the number of the rear steering mechanisms (5) is equal to that of the rear wheels (3) of the semitrailer, and each rear steering mechanism (5) is correspondingly arranged between a group of left and right opposite rear wheels (3) of the semitrailer and connected with the hydraulic driving system (6).
4. The novel semi-trailer main and follow-up steering system according to claim 3, characterized in that: 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 the left and right opposite groups of rear wheels (3) of the semitrailer, and the left and right ends of the wheel shafts are respectively hinged with the left and right opposite groups of rear wheels (3) of the semitrailer through wheel hinge shafts (52);
the left wheel steering oil cylinder (54) and the right wheel steering oil cylinder (55) are both arranged on one side of the wheel shaft (51) and are both 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 both hinged to the middle of the wheel shaft (51), and the small-diameter ends are both hinged to a group of left and right opposite semitrailer rear wheels (3) corresponding to the small-diameter ends through a wheel steering swing rod (53).
5. The novel semi-trailer main and follow-up steering system according to claim 4, characterized in that: hydraulic drive system (6) contain electricity and drive hydraulic pump (61), multichannel electromagnetism hydraulic valve group (62) and hydraulic tank (63), electricity drive hydraulic pump (61) respectively with multichannel electromagnetism hydraulic valve group (62) and hydraulic tank (63) link to each other, multichannel electromagnetism hydraulic valve group (62) respectively with hydraulic tank (63) the left side of preceding steering mechanism (4) is initiatively turned to hydro-cylinder (42), right side and is initiatively turned to hydro-cylinder (43) and every the left wheel of rear steering mechanism (5) turns to hydro-cylinder (54), right wheel and turns to hydro-cylinder (55) and links to each other.
6. The novel semi-trailer main and follow-up steering system according to claim 5, characterized in that: 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);
oil inlets of the four two-position two-way electromagnetic hydraulic valves (621) are sequentially communicated with a rod cavity and a rodless cavity of the left active steering oil cylinder (42) and a rod cavity and a rodless cavity of the right active steering oil cylinder (43), and oil return ports are correspondingly communicated with a hydraulic oil tank (63); wherein, the oil outlet of a two-position two-way electromagnetic hydraulic valve (621) communicated with the rod cavity of the left active steering oil cylinder (42) is correspondingly communicated with the rod cavity of the right wheel steering oil cylinder (55) in each rear steering mechanism (5); an oil outlet of a two-position two-way electromagnetic hydraulic valve (621) communicated with a rodless cavity of the left active steering oil cylinder (42) is correspondingly communicated with a rodless cavity of a right wheel steering oil cylinder (55) in each rear steering mechanism (5); an oil outlet of a two-position two-way electromagnetic hydraulic valve (621) communicated with a rod cavity of the right driving steering oil cylinder (43) is correspondingly communicated with a rod cavity of a left wheel steering oil cylinder (54) in each rear steering mechanism (5); an oil outlet of a two-position two-way electromagnetic hydraulic valve (621) communicated with a rodless cavity of the right driving steering oil cylinder (43) is correspondingly communicated with a rodless cavity of a left wheel steering oil 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 electrically-driven hydraulic pump (61) and the hydraulic oil tank (63) through one of the three-position four-way electromagnetic hydraulic directional valves (622);
the right wheel steering oil cylinder (55) in each rear steering mechanism (5) is correspondingly communicated with the electrically-driven hydraulic pump (61) and the hydraulic oil tank (63) through another three-position four-way electromagnetic hydraulic directional valve (622);
and each two-position two-way electromagnetic hydraulic valve (621) and each three-position four-way electromagnetic hydraulic directional valve (622) are connected with the steering remote controller through wireless communication.
7. The novel semi-trailer main and follow-up steering system according to claim 4, characterized in that: 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) respectively form a second dynamic triangle (Q) with a corresponding wheel shaft (51);
the first dynamic triangle (P) and the second dynamic triangle (Q) are similar triangles.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211112955.7A CN115432063A (en) | 2022-09-14 | 2022-09-14 | Novel semitrailer main and follow-up steering system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211112955.7A CN115432063A (en) | 2022-09-14 | 2022-09-14 | Novel semitrailer main and follow-up steering system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115432063A true CN115432063A (en) | 2022-12-06 |
Family
ID=84247579
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211112955.7A Pending CN115432063A (en) | 2022-09-14 | 2022-09-14 | Novel semitrailer main and follow-up steering system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115432063A (en) |
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2022
- 2022-09-14 CN CN202211112955.7A patent/CN115432063A/en active Pending
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