CN218055353U

CN218055353U - Four-wheel steering mechanism of cleaning vehicle

Info

Publication number: CN218055353U
Application number: CN202221974971.2U
Authority: CN
Inventors: 高维珠; 高蕾
Original assignee: Qinhuangdao Vooshe Environmental Technology Co ltd
Current assignee: Qinhuangdao Vooshe Environmental Technology Co ltd
Priority date: 2022-07-29
Filing date: 2022-07-29
Publication date: 2022-12-16
Anticipated expiration: 2032-07-29

Abstract

A four-wheel steering mechanism of a cleaning vehicle comprises a steering wheel, a steering column and a steering shaft which are connected in sequence, wherein the lower end of the steering shaft is connected with a steering gear for driving a front axle assembly, wheel frames are respectively and rotatably connected below the rear part of the vehicle frame, two rear wheels are respectively arranged on the corresponding wheel frames through respective wheel shafts, rear wheel steering arms and a steel wire rope fixing part are arranged on the two wheel frames, the two rear wheel steering arms are connected through a connecting rod which is hinged, two turning pulleys and an adjusting pulley are arranged at the rear part of the vehicle frame, the steel wire rope is fixedly connected and wound on the steering shaft, the steel wire rope on the left side bypasses the turning pulley on the left side and is connected with the steel wire rope fixing part on the left side, and the steel wire rope on the right side is connected with the steel wire rope fixing part on the right side after being turned back through the turning pulley and the adjusting pulley on the right side. The utility model discloses simple structure, the configuration cost is low, can effectively reduce the turning radius of cleaning cart, improves the flexibility of cleaning cart operation.

Description

Four-wheel steering mechanism of cleaning vehicle

Technical Field

The utility model relates to a motor vehicle steering mechanism, concretely relates to cleaning cart four-wheel steering mechanism.

Background

With the improvement of urban environmental sanitation quality, the motor-driven cleaning vehicles are more and more appeared in all corners of cities. The existing motor-driven cleaning vehicle mostly adopts two wheels to turn, has overlarge turning radius when turning, is inconvenient to turn at narrow corners of roads, and is particularly not suitable for cleaning roadside green belts and garden pavement environments. The four-wheel steering mechanism of the motor vehicle disclosed by the prior art has the advantages that the structure and the control unit of the steering mechanism are relatively complex, the configuration cost is high, and the design requirements of a small motor-driven cleaning vehicle are difficult to meet.

Disclosure of Invention

An object of the utility model is to above-mentioned problem, provide a simple structure, the configuration cost is low, is applicable to the cleaning cart four-wheel steering mechanism of small-size motor-driven cleaning cart designing requirement.

The technical scheme for realizing the purpose is as follows: a four-wheel steering mechanism of a cleaning vehicle comprises a steering wheel, a steering column and a steering shaft which are sequentially connected, wherein the lower end of the steering shaft is connected with a steering gear for driving a front axle assembly, wheel frames in an inverted U shape are respectively and rotatably connected below the rear part of a vehicle frame, a left rear wheel and a right rear wheel are respectively arranged on the corresponding wheel frames through respective wheel shafts, rear wheel steering arms which are horizontally arranged are respectively fixedly arranged on the two wheel frames, the two rear wheel steering arms are respectively hinged with a steel wire rope fixing piece, two ends of a connecting rod are respectively hinged with the corresponding rear wheel steering arms, two turning pulleys and an adjusting pulley are sequentially arranged below the rear part of the vehicle frame from left to right, a left steel wire rope and a right steel wire rope are fixedly connected and wound on the steering shaft, the steel wire rope on the left side is wound around the inner side of the turning pulley on the left side and is connected with the steel wire rope fixing piece on the left side through the turning pulley on the right side and the adjusting pulley, and the steel wire rope on the right side is connected with the steel wire rope fixing piece on the right side through the turning pulley and the adjusting pulley.

Foretell cleaning cart four-wheel steering mechanism, the frame on be equipped with diversion pulley adjusting device, this diversion pulley adjusting device is including setting firmly the diversion pulley mounting panel of frame rear portion below, be equipped with a pair of fore-and-aft slot hole on the diversion pulley mounting panel the rear end of diversion pulley mounting panel is equipped with fore-and-aft adjusting screw through screw-thread fit, adjusting screw's front end rotatable fit connects the free bearing, the free bearing hinge connect the diversion pulley holder, two diversion pulleys install through respective pulley shaft respectively the diversion pulley holder on, and the upper end of pulley shaft is run through respectively corresponding separately the slot hole.

According to the four-wheel steering mechanism of the cleaning vehicle, the steel wire rope height adjusting device is arranged below the middle part of the vehicle frame and comprises the I-shaped seat connected with the vehicle frame, four height adjusting pulleys which are opposite up and down are arranged on the inner side surfaces of the upper wing plate and the lower wing plate of the I-shaped seat through the U-shaped wheel seats respectively, and the two steel wire ropes bypass the two corresponding height adjusting pulleys respectively.

The utility model discloses a motor-driven cleaning cart provides a practical four-wheel steering mechanism, in simple structure, configuration cost hang down, can effectively reduce the turning radius of cleaning cart, improves the flexibility of cleaning cart operation, satisfies the requirement of existing urban sanitation to motor-driven cleaning cart better, is particularly useful for the environmental cleaning of garden pavement and roadside greenbelt.

Drawings

Fig. 1 is a schematic view of the four-wheel steering mechanism of the cleaning vehicle.

Fig. 2 is a schematic view of a direction-changing pulley adjusting device of the four-wheel steering mechanism of the cleaning vehicle.

Fig. 3 is a schematic view of the height adjusting device for the steel cable of the four-wheel steering mechanism of the cleaning vehicle.

In the figure: 1. a steering wheel; 2. a steering column; 3. a steering shaft; 4. driving a front axle assembly; 5. a frame; 6. a wheel frame; 7. a left rear wheel; 8. a right rear wheel; 9. a wheel steering arm; 10. a wire rope fixing member; 11. a connecting rod; 12. a direction-changing pulley; 13. adjusting the pulley; 14. a wire rope; 15. a direction-changing pulley adjusting device; 1501. a direction-changing pulley mounting plate; 1502. a long hole; 1503. adjusting the screw rod; 1504. hinging seat; 1505. a direction-changing pulley seat; 1506. a pulley shaft; 16. a wire rope height adjusting device; 1601. an I-shaped seat; 1602. a U-shaped wheel seat; 1603. a height adjusting pulley.

Detailed Description

The embodiments of the present invention will be described with reference to the accompanying drawings.

Referring to fig. 1, the four-wheel steering mechanism of the cleaning vehicle comprises a steering wheel 1, a steering column 2 and a steering shaft 3 which are connected in sequence from top to bottom, wherein the lower end of the steering shaft 3 is connected with a steering gear of an electrically-driven front axle assembly 4. The frame 5 is a frame structure, the front part of the frame 5 is connected with the electric drive front axle assembly 4 through a configured plate spring, a pair of wheel frames 6 in an inverted U shape are symmetrically and rotatably connected to the left and the right below the rear part of the frame 5, and thrust ball bearings are respectively assembled at the rotatable connection positions of the wheel frames 6 and the frame 5 so as to increase the flexibility and the stability of relative rotation. The left rear wheel 7 and the right rear wheel 8 are a pair of rear wheels, and the two rear wheels are respectively assembled with wheel shafts and are respectively arranged on the corresponding wheel frames 6 through the respective wheel shafts. And rear wheel steering arms 9 which are horizontally arranged are respectively arranged behind the two wheel frames 6, and U-shaped opening ends of the two rear wheel steering arms 9 are respectively fixedly connected with the respective opposite wheel frames 6 through welding. The rear ends of the two rear wheel steering arms 9 are respectively provided with a steel wire rope fixing piece 10, and the steel wire rope fixing pieces 10 are hinged on the rear wheel steering arms 9 through a vertically arranged hinge shaft. The connecting rod 11 is a rod with a rectangular cross section, and two ends of the connecting rod 11 are respectively hinged with the corresponding rear wheel steering arms 9. Two direction-changing pulleys 12 and an adjusting pulley 13 are sequentially arranged from left to right below the rear part of the frame 5, and the two direction-changing pulleys 12 and the adjusting pulley 13 are respectively arranged below the frame 5 through pulley shafts vertically arranged below the frame 5. The steering shaft 3 is fixedly connected with and wound with steel wire ropes, the wound steel wire ropes form a left steel wire rope 14 and a right steel wire rope 14, and the two steel wire ropes 14 are not on the same plane at the fixed positions of the steering shaft 3. The steel wire rope 14 positioned on the left side is wound by the inner side of the turning pulley 12 positioned on the left side and is connected with the steel wire rope fixing part 10 positioned on the left side, and the steel wire rope 14 positioned on the right side is connected with the steel wire rope fixing part 10 positioned on the right side after being turned backwards through the turning pulley 12 positioned on the right side and the adjusting pulley 13.

According to the four-wheel steering mechanism of the cleaning vehicle, when the cleaning vehicle steers to the right, the steering wheel 1 drives the connecting shaft 3 to rotate clockwise and drives the two front wheels to rotate to the right through the steering gear, meanwhile, the steel wire rope 14 on the left side winds on the connecting shaft 3, and the steel wire rope 14 on the right side is synchronously released, so that the left rear wheel 7 and the right rear wheel 8 rotate to the left, and four-wheel steering is realized; similarly, when the cleaning vehicle turns left, the steering wheel 1 drives the connecting shaft 3 to rotate anticlockwise and drives the two front wheels to rotate left through the steering gear, meanwhile, the steel wire rope 14 on the right side winds the connecting shaft 3, the steel wire rope 14 on the left side is synchronously released, so that the left rear wheel 7 and the right rear wheel 8 rotate right, and four-wheel steering is realized.

As shown in fig. 1 and 2, a direction-changing pulley adjusting device 15 is arranged on the vehicle frame 5, the direction-changing pulley adjusting device 15 includes a horizontally arranged direction-changing pulley mounting plate 1501, a vertically arranged connecting plate for bolting the vehicle frame 5 is arranged on the direction-changing pulley mounting plate 1501, a pair of longitudinal long holes 1502 is arranged on the front portion of the direction-changing pulley mounting plate 1501, a vertically arranged screw mounting plate is arranged at the rear end of the direction-changing pulley mounting plate 1501, a longitudinal adjusting screw 1503 is assembled through thread fit, the front end of the adjusting screw 1503 is rotatably connected with a hinge base 1504 in a fit manner, and a bearing can be assembled at the rotatably matched connection position of the adjusting screw 1503 and the hinge base 1504 to improve the flexibility of relative rotation of the rotatably matched connecting piece. The front end of the hinged seat 1504 is hinged to a direction-changing pulley seat 1505, the two direction-changing pulleys 12 are respectively installed on the direction-changing pulley seat 1505 through respective pulley shafts 1506, and the upper ends of the pulley shafts 1506 respectively penetrate through the respective corresponding long holes 1502. As shown in the embodiment of the drawings, the pulley shaft 1506 is a bolt shaft.

The direction-changing pulley adjusting device 15 is used to adjust the front and rear positions of the direction-changing pulley 12 and the tension of the wire rope 14.

As shown in fig. 1 and 3, a steel wire height adjusting device 16 is arranged below the middle part of the frame 5 of the four-wheel steering mechanism of the cleaning vehicle, the steel wire height adjusting device 16 includes an i-shaped seat 1601, and a vertical connecting plate for bolting the frame 5 is arranged on an upper wing plate of the i-shaped seat 1601. Four height adjusting pulleys 1603 which are opposite up and down in pairs are arranged on the inner side surfaces of an upper wing plate and a lower wing plate of the I-shaped seat 1601 through U-shaped wheel seats 1602 which are respectively configured, and the two steel wire ropes 14 respectively bypass the two corresponding height adjusting pulleys 1603, so that the height of the two steel wire ropes 14 at the middle position of the frame 5 is adjusted in a descending manner.

The arrangement of the wire height adjusting device 16 can be adapted to the form of the vehicle frame 5 with a high front part and a low rear part as shown in fig. 1, so as to meet the requirements of the cleaning vehicle on the form of the vehicle frame 5.

Claims

1. The utility model provides a cleaning cart four-wheel steering mechanism, includes steering wheel (1), steering column (2) and steering spindle (3) that connect gradually, the lower extreme of steering spindle (3) is connected characterized by with the steering gear of drive front axle assembly (4): the rear lower part of the frame (5) is respectively rotatably connected with a wheel frame (6) in an inverted U shape, a left rear wheel (7) and a right rear wheel (8) are respectively installed on the corresponding wheel frames (6) through respective wheel shafts, rear wheel steering arms (9) which are horizontally arranged are respectively fixedly arranged on the two wheel frames (6), the two rear wheel steering arms (9) are respectively hinged with a steel wire rope fixing piece (10), two ends of a connecting rod (11) are respectively hinged with the corresponding rear wheel steering arms (9), two turning pulleys (12) and an adjusting pulley (13) are sequentially arranged below the rear part of the frame (5) from left to right, the steering shaft (3) is fixedly connected with and wound with a left steel wire rope and a right steel wire rope (14), the steel wire rope (14) on the left side is wound around the inner side of the turning pulley (12) on the left side and is connected with the steel wire rope fixing piece (10) on the left side, and the steel wire rope (14) on the right side is connected with the turning pulley (12) through the turning pulley (12) on the right side and the steel wire rope (13).

2. The four-wheel steering mechanism for cleaning vehicle as claimed in claim 1, wherein: the bicycle frame is characterized in that a direction-changing pulley adjusting device (15) is arranged on the bicycle frame (5), the direction-changing pulley adjusting device (15) comprises a direction-changing pulley mounting plate (1501) fixedly arranged below the rear portion of the bicycle frame (5), a pair of longitudinal long holes (1502) are formed in the direction-changing pulley mounting plate (1501), a longitudinal adjusting screw (1503) is arranged at the rear end of the direction-changing pulley mounting plate (1501) in a threaded fit mode, the front end of the adjusting screw (1503) is rotatably matched with a hinge base (1504), the hinge base (1504) is hinged with a direction-changing pulley base (1505), the two direction-changing pulleys (12) are respectively mounted on the direction-changing pulley base (1505) through respective pulley shafts (1506), and the upper ends of the pulley shafts (1506) respectively penetrate through the corresponding long holes (1502).

3. The four-wheel steering mechanism for cleaning vehicle as claimed in claim 1, wherein: a steel wire rope height adjusting device (16) is arranged below the middle part of the frame (5), the steel wire rope height adjusting device (16) comprises an I-shaped seat (1601) connected with the frame (5), four height adjusting pulleys (1603) which are opposite up and down in pairs are arranged on the inner side surfaces of an upper wing plate and a lower wing plate of the I-shaped seat (1601) through U-shaped wheel seats (1602) respectively configured, and the two steel wire ropes (14) respectively bypass the two corresponding height adjusting pulleys (1603).