CN113636007A

CN113636007A - Four-wheel steering mechanism and application device thereof

Info

Publication number: CN113636007A
Application number: CN202110904506.5A
Authority: CN
Inventors: 张孟仁; 徐虎
Original assignee: Taicang Jinquan Metal Product Co ltd
Current assignee: Taicang Jinquan Metal Product Co ltd
Priority date: 2021-08-06
Filing date: 2021-08-06
Publication date: 2021-11-12

Abstract

The application relates to a four-wheel steering mechanism and an application device thereof, and the four-wheel steering mechanism comprises a front wheel assembly, a linkage rod, a rear wheel assembly, a driving assembly and a connecting frame, wherein the linkage rod and the connecting frame are arranged between the front wheel assembly and the rear wheel assembly; through under drive assembly's drive, realize that the rear wheel carries out reverse motion when the front wheel is turning, and then reduced four-wheel steering mechanism's turning radius to the flexibility ratio of four-wheel drive device when turning that comprises four-wheel steering mechanism has been improved. This application has the turning radius who reduces four-wheel steering mechanism, has improved the effect of the flexibility ratio when four-wheel steering mechanism application device turns.

Description

Four-wheel steering mechanism and application device thereof

Technical Field

The application relates to the technical field of vehicle engineering, in particular to a four-wheel steering mechanism and an application device thereof.

Background

The conventional four-wheel driving devices of various types, such as knee walker, scooter, four-wheel electric vehicle, automobile, tractor, etc., are generally used for steering the front wheel when turning, so as to drive the vehicle body and the rear wheel to turn integrally in the same direction.

When the four-wheel driving device turns, the turning radius is larger and the turning is not flexible when the turning directions of the rear wheels and the front wheels are the same.

In view of the above-mentioned related technologies, the inventor believes that the overall turning radius of the vehicle is large when the conventional four-wheel drive device is used for steering, and the turning is not flexible enough, and particularly the maneuverability of the four-wheel drive device in steering in a narrow space is limited.

Disclosure of Invention

In order to reduce the radius of four wheel drive device when turning, improve its turn flexibility ratio, this application provides a four-wheel steering mechanism and application apparatus thereof.

In a first aspect, the four-wheel steering mechanism provided by the application adopts the following technical scheme:

the four-wheel steering mechanism comprises a front wheel assembly, a linkage rod, a rear wheel assembly, a driving assembly and a connecting frame;

the driving assembly comprises a driving shaft and a sleeve, and the lower end of the driving shaft penetrates through the sleeve to be connected with a connecting lug;

the front wheel assembly comprises a front cross beam, two front wheel seats, two front wheels, two front steering knuckle arms and two front steering pull rods, the two front wheel seats are symmetrically arranged at two ends of the front cross beam, and each front wheel seat is arranged between the front wheel and the front cross beam; one end of the front steering knuckle arm is connected with the front wheel seat, the other end of the front steering knuckle arm is hinged with one end of a front steering pull rod, and the other end of the front steering pull rod is hinged on the connecting lug; the sleeve is fixedly connected with the middle part of the front cross beam;

the rear wheel assembly comprises a rear cross beam, rear wheel seats and two rear wheels, the two rear wheel seats are symmetrically arranged at two ends of the rear cross beam, and each rear wheel seat is arranged between the rear wheel and the rear cross beam;

one end of the linkage rod is hinged with the driving shaft, and the other end of the linkage rod is hinged with the two rear wheel seats; one end of the connecting frame is fixedly connected to the sleeve, and the other end of the connecting frame is fixedly connected to the rear cross beam.

By adopting the technical scheme, when the four-wheel steering mechanism turns, the driving shaft rotates by driving the front wheel, and simultaneously drives the linkage rod to transmit steering force to control the rear wheel to turn towards the opposite direction through the rear wheel seat, so that the integral turning radius of the mechanism is reduced, and the flexibility of the four-wheel mechanism during turning is improved.

Optionally, the driving shaft extends into the casing through a connecting block, the connecting block is welded to the driving shaft, and two connecting rods are fixedly connected to two sides of the connecting shaft below the connecting block; the linkage rods are symmetrically arranged about the connecting frame, one ends of the two linkage rods are hinged with the two connecting rods respectively, and the other ends of the two linkage rods are hinged with the two rear wheel seats respectively.

By adopting the technical scheme, the connecting block strengthens the structural strength of the active component; the two linkage rods enable the overall structure of the four-wheel steering mechanism to be more stable.

Optionally, the rear wheel assembly further comprises two rear wheel steering knuckle arms and a rear steering pull rod, the rear steering knuckle arms are connected to the rear wheel seat, the rear wheel steering pull rod is arranged between the two rear wheel steering knuckle arms, and two ends of the rear steering pull rod are hinged to the two rear steering knuckle arms respectively.

By adopting the technical scheme, the rear steering pull rod acts on the two rear steering knuckle arms simultaneously, so that the two rear wheels acting on the two rear steering knuckle arms have synchronism, the steering consistency of the two rear wheels is better, and the integral turning radius of the mechanism is more favorably reduced.

In a second aspect, the present application provides a wheel drive apparatus, which adopts the following technical solution:

the wheel type driving device comprises the four-wheel steering mechanism.

By adopting the technical scheme, the four-wheel steering mechanism can be applied to various four-wheel drive devices.

Optionally, the wheeled drive is a knee scooter or scooter.

Optionally, the driving shaft comprises an outer rod, an inner rod and a fastening bolt, the lower end of the inner rod is sleeved in the outer rod, and the fastening bolt penetrates through the joint of the inner rod and the outer rod.

Through adopting above-mentioned technical scheme, the drive shaft can stretch out and draw back as required, adjusts the height on drive shaft and ground, has improved the convenience of using.

Optionally, the handle is arranged above the inner rod.

Optionally, still include brake mechanism, brake mechanism includes operating handle, brake cable and two band-type brake mechanisms, the operating handle sets up on the handle, the brake cable sets up between operating handle and band-type brake mechanism, band-type brake mechanism sets up at the rear wheel inboard.

By adopting the technical scheme, the internal contracting brake mechanism is designed on the inner side of the rear wheel, so that the whole structure of the four-wheel driving device is more compact, and the braking mechanism improves the safety of the wheel type driving device.

Optionally, the knee scooter further comprises a seat and a base, the seat is arranged above the connecting frame close to the rear wheel assembly, and the base is arranged above the connecting frame.

Through adopting above-mentioned technical scheme, the base plays the guard action to the gangbar and the brake cable that set up around the link on the one hand, and on the other hand convenience of customers sits when on the saddle, places the both feet on the base, has improved the comfort level of using.

Optionally, the scooter further comprises a pedal, wherein the pedal is erected between the front wheel assembly and the rear wheel assembly.

In summary, the present application includes at least one of the following beneficial technical effects:

1. according to the four-wheel drive device, the driving assembly and the linkage rod are arranged in the four-wheel steering mechanism, the driving assembly is used for driving the front wheel to turn, and meanwhile, the linkage rod hinged with the driving assembly drives the rear wheel to rotate in the opposite direction, so that the turning radius of the whole four-wheel mechanism is greatly reduced, and the flexibility of the four-wheel drive device is higher;

2. according to the rear wheel assembly, the rear steering knuckle arm and the rear steering pull rod are arranged on the rear wheel assembly, so that the rear wheel is better in synchronism during steering;

3. this application sets the axis of rotation through with four wheel drive device to the telescopic structure for the distance on grip to ground can be adjusted as required, thereby improves convenience and the comfort level of using.

Drawings

Fig. 1 is an external view of a four-wheel steering mechanism in an embodiment of the present application.

Fig. 2 is an enlarged view at a in fig. 1.

Fig. 3 is an external view of the knee scooter according to the embodiment of the present application.

Fig. 4 is an external view of a scooter according to an embodiment of the present application.

Description of reference numerals: 1. a front wheel assembly; 11. a front cross member; 12. a front wheel seat; 13. a front wheel; 14. a front knuckle arm; 15. a front steering link; 2. a linkage rod; 3. a rear wheel assembly; 31. a rear cross member; 32. a rear wheel seat; 33. a rear wheel; 34. a rear wheel steering knuckle arm; 35. a rear steering tie rod; 4. a drive assembly; 41. a drive shaft; 411. outer pole, 412, inner pole; 413. fastening a bolt; 42. a sleeve; 43. connecting lugs; 44. a connecting rod; 45. connecting blocks; 5. a connecting frame; 6. a grip; 7. a vehicle seat; 8. a brake mechanism; 81. an operating handle; 82. a brake cable; 83. a band-type brake mechanism; 9. a pedal; 10. a base.

Detailed Description

The present application is described in further detail below with reference to figures 1-4.

The embodiment of the application discloses a four-wheel steering mechanism. Referring to fig. 1, the four-wheel steering mechanism includes a front wheel assembly 1, a linkage rod 2, a rear wheel assembly 3, and a connecting frame 5, wherein the linkage rod 2 and the connecting frame 5 are both disposed between the front wheel assembly 1 and the rear wheel assembly 3.

Referring to fig. 1, the front wheel assembly 1 includes a front cross member 11, two front wheel seats 12 and two front wheels 13, wherein the two front wheel seats 12 are symmetrically disposed at two ends of the front cross member 11, and each front wheel seat 12 is further disposed between the front wheel 13 and the front cross member 11; the front wheel assembly 1 further comprises two front steering knuckle arms 14 and two front steering pull rods 15, wherein one end of each front steering knuckle arm 14 is connected with the lower end of the front wheel seat 12, and the other end of each front steering knuckle arm is hinged with the corresponding front steering pull rod 15.

Referring to fig. 1 and 2, the middle part of the front cross beam 11 is further connected with a driving assembly 4, the driving assembly 4 comprises a driving shaft 41, a sleeve 42, a connecting lug 43 and a connecting block 45, wherein the connecting block 45 is arranged at the lower part of the driving shaft 41, and the connecting block 45 is welded with the driving shaft 41, so that the structural strength of the driving assembly 4 is improved; the lower end of the driving shaft 41 penetrates through the sleeve 42 to be connected with a connecting lug 43, and the sleeve 43 is welded with the front cross beam 11 and is positioned in the middle of the front cross beam 11; the sleeve 42 is also fixedly connected with one end of the connecting frame 5, and the other end of the connecting frame 5 is fixedly connected with the rear wheel assembly 3. Specifically, the rear wheel assembly 3 comprises a rear cross beam 31, two rear wheel seats 32, two rear wheels 33, two rear wheel steering knuckle arms 34 and a rear wheel steering pull rod 35, one end of the connecting frame 5 is fixedly connected with the sleeve 42, and the other end of the connecting frame is fixedly connected with the rear cross beam 31; the connecting frame 5 ensures that the integral structure formed by the connecting frame and the front cross beam 11 and the rear cross beam 31 is kept still; the two rear wheel seats 32 are symmetrically connected to two ends of the rear cross beam 31, and each rear wheel seat 32 is arranged between the rear wheel 33 and the rear cross beam 31; the lower surface of the rear wheel seat 32 is connected with rear wheel knuckle arms 34, a rear wheel steering pull rod 35 is arranged between the two rear wheel knuckle arms 34, and two ends of the rear wheel steering pull rod are hinged with the two rear wheel knuckle arms 34; the synchronism of the two rear wheels 33 is improved by the combined action of the rear wheel steering tie rod 35 and the two knuckle arms 34.

Two connecting rods 44 are symmetrically connected to two sides of the driving shaft 42 below the connecting block 45, two linkage rods 2 are symmetrically arranged about the connecting frame 5, the two connecting rods 44 are hinged to one ends of the two linkage rods 2, and the other ends of the two linkage rods 2 are hinged to the rear wheel seat 32; the two linkage rods 2 are arranged, so that the overall stability of the four-wheel mechanism is improved.

The implementation principle of the four-wheel steering mechanism in the embodiment of the application is as follows: the two ends of the connecting frame 5 are fixedly connected with the front cross beam 11 and the rear cross beam 31, so that the front cross beam 11 and the rear cross beam 31 are always kept still; the driving shaft 41 rotates to drive the connecting lug 43 at the lower end of the driving shaft to rotate, the connecting lug 43 drives the two front steering knuckle arms 14 to drive the two front wheels 13 to rotate simultaneously, meanwhile, the linkage rod 2 hinged to the driving shaft 41 and the linkage rod 2 are also hinged to the rear wheel seat 32 to drive the two rear wheels 33 to rotate in the opposite direction to the two front wheels 13, so that the turning radius of the four-wheel steering mechanism is reduced, and the four-wheel mechanism turns more flexibly.

Example 2

The embodiment of the application also discloses a wheel type driving device. Referring to fig. 3, the wheel type driving device is a knee walker, and the knee walker comprises the four-wheel steering mechanism.

Referring to fig. 3, the knee walker further includes a handle 6, the handle 6 is disposed above the driving shaft 41, the driving shaft 41 includes an outer rod 411, an inner rod 412 and a fastening bolt 413, wherein the lower end of the inner rod 412 is sleeved on the upper portion of the outer rod 411, the lower end of the outer rod 411 passes through the sleeve 42, through holes are formed in different positions of the upper portion of the outer rod 411, through holes are also formed in corresponding positions of the lower portion of the inner rod 412, and the fastening bolt 413 passes through the outer rod 411 and the inner rod 412 to lock the outer rod 411 and the inner rod 412; such structural design makes drive shaft 41 scalable, and the user can adjust the distance of drive shaft 41 distance ground as required to the convenience of using has been improved.

The knee scooter further comprises a brake mechanism 8, the brake mechanism 8 comprises an operating handle 81, a brake cable 82 and two band-type brake mechanisms 83, the operating handle 81 is arranged on one side of the handle 6, and the band-type brake mechanisms 83 are arranged on the inner side of the rear wheel 33, so that the overall structure of the knee scooter is more compact; one end of the brake cable 82 is connected to the operating handle 81, the brake cable 82 is divided into two parts in the middle, and two ends of the brake cable 82 are respectively connected to the internal contracting brake mechanism 83; the brake mechanism 8 is arranged, so that real-time control can be effectively carried out on the knee scooter, and the safety of the scooter in use is guaranteed.

The knee scooter further comprises a saddle 7 and a base 10, wherein the saddle 7 is arranged above the connecting frame 5 through a supporting rod, specifically, one end of the supporting rod is fixedly connected to the connecting frame 5 close to the rear wheel component 3, and the other end of the supporting rod is connected with the saddle 7. The base 10 is arranged above the connecting frame 5, not only plays a role in protecting the linkage rod 2 and the brake cable 82, but also facilitates a user to put feet on the base, and improves the comfort level of the user.

The implementation principle of the knee scooter provided by the embodiment of the application is as follows: the user puts the both feet on base 10 through sitting on saddle 7, and both hands hold at handle 6 both ends, drive four-wheel steering mechanism through rotating handle 6 and rotate for the whole turning radius of knee car of riding instead of walk reduces, thereby has improved the flexibility ratio when knee car of riding instead of walk turns.

Example 3

The embodiment of the application also discloses a wheel type driving device. Referring to fig. 4, the wheel drive device is a scooter, and the scooter includes the four-wheel steering mechanism described above.

Referring to fig. 4, the present embodiment is different from embodiment 2 in that the seat 7 and the base 10 in embodiment 1 are replaced with pedals 9, the pedals 9 are disposed between the front wheel assembly 1 and the rear wheel assembly 3, and one end thereof is sleeved on the lower portion of the outer rod 411, and the other end thereof is erected on the rear cross member 31.

The implementation principle of this application embodiment scooter does: the user is through standing on footboard 9, and two hands are held at 6 both ends of handle, drive four-wheel steering mechanism through rotating handle 6 and rotate, have reduced the turning radius of scooter to the flexibility of scooter has been improved.

It should be noted that the four-wheel steering mechanism of the present application can be applied to various four-wheel drive devices, such as automobiles, four-wheel electric vehicles, tractors, etc., and is not limited to knee mobility vehicles and scooters.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. Four-wheel steering mechanism, its characterized in that: comprises a front wheel component (1), a linkage rod (2), a rear wheel component (3), a driving component (4) and a connecting frame (5);

the driving assembly (4) comprises a driving shaft (41) and a sleeve (42), and the lower end of the driving shaft (41) penetrates through the sleeve (42) to be connected with a connecting lug (43);

the front wheel assembly (1) comprises a front cross beam (11), two front wheel seats (12), two front wheels (13), two front steering knuckle arms (14) and two front steering pull rods (15), wherein the two front wheel seats (12) are symmetrically arranged at two ends of the front cross beam (11), and each front wheel seat (12) is arranged between the front wheel (13) and the front cross beam (11); one end of the front steering knuckle arm (14) is connected with the front wheel seat (12), the other end of the front steering knuckle arm is hinged with one end of a front steering pull rod (14), and the other end of the front steering pull rod (14) is hinged on a connecting lug (43); the sleeve (42) is fixedly connected with the middle part of the front cross beam (11);

the rear wheel assembly (3) comprises a rear cross beam (31), rear wheel seats (32) and two rear wheels (33), the two rear wheel seats (32) are symmetrically arranged at two ends of the rear cross beam (31), and each rear wheel seat (32) is arranged between the rear wheel (33) and the rear cross beam (31);

one end of the linkage rod (2) is hinged with the driving shaft (41), and the other end of the linkage rod is hinged with the two rear wheel seats (32); one end of the connecting frame (5) is fixedly connected to the sleeve (42), and the other end of the connecting frame is fixedly connected to the rear cross beam (31).

2. The four-wheel steering mechanism according to claim 1, wherein: the driving shaft (41) extends into the sleeve (42) through a connecting block (45), the connecting block (45) is welded with the driving shaft (41), and two connecting rods (44) are fixedly connected to two sides of the driving shaft (41) below the connecting block (45); the linkage rods (2) are symmetrically arranged about the connecting frame (5), one ends of the two linkage rods (2) are hinged to the two connecting rods (44) respectively, and the other ends of the two linkage rods are hinged to the two rear wheel seats (32) respectively.

3. The four-wheel steering mechanism according to claim 1, wherein: the rear wheel assembly further comprises two rear steering knuckle arms (34) and a rear steering pull rod (35), the rear steering knuckle arms (34) are connected to the rear wheel seat (31), the rear wheel steering pull rod (35) is arranged between the two rear wheel steering knuckle arms (34), and two ends of the rear steering pull rod (35) are hinged to the two rear steering knuckle arms (34) respectively.

4. Wheeled drive arrangement, its characterized in that: comprising a four-wheel steering mechanism according to claims 1-3.

5. A wheeled drive as claimed in claim 4, characterised in that: the wheel type driving device is a knee scooter or a scooter.

6. A wheeled drive as claimed in claim 4, characterised in that: the driving shaft (41) comprises an outer rod (411), an inner rod (412) and a fastening bolt (413), the lower end of the inner rod (412) is sleeved in the outer rod (411), and the fastening bolt (413) penetrates through the connecting position of the inner rod (412) and the outer rod (412).

7. A wheeled drive as claimed in claim 6, characterised in that: the handle is characterized by further comprising a handle (6), wherein the handle (6) is arranged above the inner rod (412).

8. A wheeled drive as claimed in claim 7, characterised in that: still include brake mechanism (8), brake mechanism (8) include handle (81), brake cable (82) and two band-type brake mechanisms (83), handle (81) set up on handle (10), brake cable (82) set up between handle (81) and band-type brake mechanism (83), band-type brake mechanism (83) set up in rear wheel (33) inboardly.

9. A wheeled drive as claimed in claim 5, characterised in that: the knee scooter further comprises a saddle (7) and a base (10), wherein the saddle (7) is arranged above the connecting frame (5) close to the rear wheel assembly (2), and the base (10) is arranged above the connecting frame (5).

10. A wheeled drive as claimed in claim 5, characterised in that: the scooter still includes footboard (9), footboard (9) set up between front wheel subassembly (1) and rear wheel subassembly (3).