CN219687421U - Four-wheel independent driving vehicle steering gear - Google Patents

Abstract

The utility model discloses a four-wheel independent drive vehicle steering gear, which relates to the technical field of steering gears, wherein when a driving component drives a rack to axially move to the right side, a first limiting block and a first lug are abutted against each other to limit the rightward movement of the rack, when the driving component drives the rack to axially move to the left side, a second limiting block and a second lug are abutted against each other to limit the leftward movement of the rack, the first limiting block plays a role in supporting and limiting the rack, the first lug and the second lug are supported and limited by utilizing the self structure of a shell, and the installation space of the four-wheel independent drive vehicle steering gear is saved.

Description

Four-wheel independent driving vehicle steering gear

Technical Field

The utility model relates to the technical field of steering gears, in particular to a four-wheel independent drive vehicle steering gear.

Background

Steering systems are one of the key systems of automobiles, and are critical to the running safety of automobiles. Although conventional steering systems (mechanical, hydraulic or electric power steering systems) have been developed quite well and widely used in modern automobiles, with continued advances in automobiles and electronics and significant improvements in the living standard of people, conventional steering systems have not met the demands of people for high performance steering systems to some extent. As a new method for improving the dynamic performance of the vehicle, the four-wheel steering technology has been increasingly paid attention to and applied. Compared with the traditional steering system, the four-wheel steering system not only can overcome the problems existing in the traditional steering system, but also can reverse phase steering of front and rear wheels during low-speed turning, and can reduce the turning radius of the vehicle and improve the maneuverability; when turning at high speed, the front and rear wheels mainly turn in the same phase, so that the side deflection angle of the mass center of the vehicle can be reduced, the steady-state overshoot of the yaw rate of the vehicle can be reduced, and the steering stability of the vehicle can be further improved. However, the four-wheel steering apparatus has a small housing, and an internal space is limited, and how to limit the movement of the rack in a limited space is a problem that an engineer needs to consider.

Disclosure of Invention

1. Technical problem to be solved by the utility model

According to the four-wheel independent driving vehicle steering gear, the four wheels are independently controlled by the four steering gears respectively, the first lug and the second lug of the shell are used for limiting, and the installation space of the four-wheel independent driving vehicle steering gear is saved.

2. Technical proposal

In order to solve the problems, the technical scheme provided by the utility model is as follows: the utility model provides a four-wheel independent drive vehicle steering gear, includes casing, rack and drive assembly, drive assembly passes casing and rack engagement, the rack has first end and second end, first end removes to be located inside the casing, the second end stretches out the casing and is connected with the bulb seat, the bulb seat is equipped with the second stopper, the casing inner peripheral wall is equipped with first lug and second lug, first end periphery is equipped with first stopper, first stopper slides with the casing inner peripheral wall and supports and lean on, when drive assembly drive rack removes, first stopper supports with first lug each other, perhaps the second stopper supports with the second lug each other.

Optionally, a bushing is further arranged in the shell, one closed end of the shell is a closed end, one open end of the shell is an open end, two ends of the bushing respectively lean against the closed end and the first bump, and the first limiting block is in sliding fit with the inner peripheral wall of the bushing.

Optionally, the ball seat includes ball handle and ball seat, the ball handle can be dismantled with the second end and be connected, the ball seat has the recess that holds the bulb, the ball seat periphery wall is equipped with the second stopper.

Optionally, the second end is provided with an internal thread, and the ball handle is provided with an external thread matched with the internal thread, or the ball handle is connected with the second end through a pin.

Optionally, the drive assembly includes motor, worm wheel, worm and gear shaft, the motor is connected with the worm, worm and worm wheel meshing, the worm wheel cover is established on the gear shaft, gear shaft and rack meshing, and the gear shaft is located between first lug and the second lug.

Optionally, balls are inlaid in the peripheral wall of the first limiting block.

Optionally, the first stopper and the first lug complex one side, the second stopper and the second lug complex one side all are equipped with the cushion.

Optionally, rack one side is equipped with the teeth of a cogwheel, and the rack opposite side slides with first lug and second lug respectively and supports and lean on, the first end periphery wall of rack is equipped with the screw thread, first stopper passes through the screw thread and can dismantle with first end and be connected.

3. Advantageous effects

Compared with the prior art, the technical scheme provided by the utility model has the following beneficial effects:

(1) According to the four-wheel independent driving vehicle steering gear provided by the embodiment of the utility model, one end of the rack is positioned in the shell, the other end of the rack extends out of the shell and is connected with the ball seat, and each wheel is driven by the corresponding steering gear. When the drive assembly drives the rack to move towards the right side axial direction, the first limiting block and the first lug are propped against each other to limit the rightward movement of the rack, when the drive assembly drives the rack to move towards the left side axial direction, the second limiting block and the second lug are propped against each other to limit the leftward movement of the rack, the first limiting block plays a role in supporting and limiting the rack, the first lug and the second lug of the self-structure of the shell are utilized to limit and support the rack, and the installation space of the steering gear of the four-wheel independent drive vehicle is saved.

Drawings

Fig. 1 is a schematic structural diagram of a four-wheel independent drive vehicle steering gear according to an embodiment of the present utility model.

Fig. 2 is a cross-sectional view of a four-wheel independent drive vehicle steering gear according to an embodiment of the present utility model.

The marks in the drawings are as follows: 1. a housing; 11. a first bump; 12. a second bump; 13. a closed end; 14. an open end; 2. a rack; 21. a first end; 22. a second end; 23. a first limiting block; 24. a second limiting block; 3. a drive assembly; 31. a worm wheel; 32. a gear shaft; 33. a worm; 4. a bushing; 5. a ball seat; 51. a ball handle; 52. ball seat.

Detailed Description

For a further understanding of the present utility model, the present utility model will be described in detail with reference to the drawings and examples.

The utility model is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the utility model and are not limiting of the utility model. It should be noted that, for convenience of description, only the portions related to the utility model are shown in the drawings. The first, second, etc. words are provided for convenience in describing the technical scheme of the present utility model, and have no specific limitation, and are all generic terms, and do not constitute limitation to the technical scheme of the present utility model. It should be noted that, without conflict, the embodiments of the present utility model and features of the embodiments may be combined with each other. In the description of the present utility model, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Unless specifically stated or limited otherwise, the terms "mounted," "connected," and "coupled" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art. The technical schemes in the same embodiment and the technical schemes in different embodiments can be arranged and combined to form a new technical scheme without contradiction or conflict, which is within the scope of the utility model.

Example 1

Referring to fig. 1-2, the four-wheel independent drive steering gear of the embodiment comprises a housing 1, a rack 2 and a drive assembly 3, wherein the drive assembly 3 penetrates through the housing 1 to be meshed with the rack 2, the rack 2 is provided with a first end 21 and a second end 22, the first end 21 is movably positioned inside the housing 1, the second end 22 extends out of the housing 1 and is connected with a ball seat 5, the ball seat 5 is provided with a second limiting block 24, the inner peripheral wall of the housing 1 is provided with a first lug 11 and a second lug 12, the outer periphery of the first end 21 is provided with a first limiting block 23, the first limiting block 23 is in sliding abutting contact with the inner peripheral wall of the housing 1, and when the drive assembly 3 drives the rack 2 to move, the first limiting block 23 and the first lug 11 are in mutual abutting contact, or the second limiting block 24 and the second lug 12 are in mutual abutting contact. One end of the rack 2 is positioned in the shell 1, the other end of the rack 2 extends out of the shell 1 and is connected with the ball seat 5, and each wheel is driven by a corresponding steering gear. When the driving component 3 drives the rack 2 to axially move towards the right side, the first limiting block 23 and the first lug 11 are abutted against each other to limit the rightward movement of the rack 2, when the driving component 3 drives the rack 2 to axially move towards the left side, the second limiting block 24 and the second lug 12 are abutted against each other to limit the leftward movement of the rack 2, the first limiting block 23 plays a role in supporting and limiting the rack 2, the first lug 11 and the second lug 12 are limited by utilizing the self structure of the shell 1, and the installation space of the steering gear of the four-wheel independent driving vehicle is saved.

Example 2

With reference to fig. 1-2, the four-wheel independent drive vehicle steering apparatus of the present embodiment, compared with the technical solution of embodiment 1, can be improved as follows: the inside of the shell 1 is also provided with a lining 4, one closed end 13 of the shell 1 is provided with an open end 14, two ends of the lining 4 respectively lean against the closed end 13 and the first protruding block 11, and the first limiting block 23 is in sliding fit with the inner peripheral wall of the lining 4. The bush 4 supports the rack 2. The bushing 4 is a sleeve or a bearing.

Example 3

With reference to fig. 1-2, the four-wheel independent drive vehicle steering apparatus of the present embodiment, compared with the technical solution of embodiment 1 or 2, can be improved as follows: the ball seat 5 comprises a ball handle 51 and a ball seat 52, the ball handle 51 is detachably connected with the second end 22, the ball seat 52 is provided with a groove for accommodating a ball head, and the periphery wall of the ball seat 52 is provided with the second limiting block 24. The ball seat 5 utilizes the structure of the ball seat and the shell 1 to limit, so that the internal space of the shell 1 is further saved. In other embodiments, the second limiting block 24 may also be disposed on the outer peripheral wall of the second end 22.

Example 4

With reference to fig. 1-2, the four-wheel independent drive vehicle steering apparatus of the present embodiment, compared with any one of the technical solutions of embodiments 1-3, can be improved as follows: the second end 22 is provided with an internal thread, the knob 51 is provided with an external thread matching the internal thread, or the knob 51 is connected to the second end 22 by a pin. The ball seat 5 is detachably connected with the second end 22, so that the ball seat is convenient to replace.

Example 5

With reference to fig. 1-2, the four-wheel independent drive vehicle steering apparatus of the present embodiment, compared with any one of the technical solutions of embodiments 1-4, can be improved as follows: the driving assembly 3 comprises a motor, a worm wheel 31, a worm 33 and a gear shaft 32, wherein the motor is connected with the worm 33, the worm 33 is meshed with the worm wheel 31, the worm wheel 31 is sleeved on the gear shaft 32, the gear shaft 32 is meshed with the rack 2, and the gear shaft 32 is positioned between the first protruding block 11 and the second protruding block 12. The motor drives the worm 33 to rotate, the worm 33 drives the worm wheel 31 to rotate, the worm wheel 31 drives the gear shaft 32 to rotate, so that the gear shaft 32 drives the rack 2 to axially move, and in other embodiments, the gear shaft 32 can be located outside the first protruding block 11 and the second protruding block 12.

Example 6

With reference to fig. 1-2, the four-wheel independent drive vehicle steering apparatus of the present embodiment, compared with any one of the technical solutions of embodiments 1-5, can be improved as follows: balls are embedded in the peripheral wall of the first limiting block 23. The first stopper 23 is in rolling contact with the inner peripheral wall of the housing 1 or the inner peripheral wall of the bush 4 via balls, so that sliding is changed into rolling, and friction is reduced.

Example 7

With reference to fig. 1-2, the four-wheel independent drive vehicle steering apparatus of the present embodiment, compared with any one of the technical solutions of embodiments 1-6, can be improved as follows: the first limiting block 23 and the first lug 11 are matched with one side, and the second limiting block 24 and the second lug 12 are matched with one side respectively provided with soft cushions, so that abnormal sound is eliminated when the first limiting block 23 and the first lug 11 are in direct contact with the second limiting block 24 and the second lug 12, and the comfort of use is improved.

Example 8

With reference to fig. 1-2, the four-wheel independent drive vehicle steering apparatus of the present embodiment, compared with any one of the technical solutions of embodiments 1-7, can be improved as follows: one side of the rack 2 is provided with gear teeth, and the other side of the rack 2 is respectively in sliding abutting connection with the first lug 11 and the second lug 12. The gear teeth are meshed with the gear shaft 32 of the driving assembly 3, and the first lug 11 and the second lug 12 play roles of limiting and supporting at the same time; the outer circumferential wall of the first end 21 of the rack 2 is provided with threads, the first limiting block 23 is detachably connected with the first end 21 through the threads, and in other embodiments, the first limiting block 23 can be sleeved on the outer circumferential wall of the first end 21 through interference fit.

The utility model and its embodiments have been described above by way of illustration and not limitation, and the utility model is illustrated in the accompanying drawings and described in the drawings in which the actual structure is not limited thereto. Therefore, if one of ordinary skill in the art is informed by this disclosure, the structural mode and the embodiments similar to the technical scheme are not creatively designed without departing from the gist of the present utility model.

Claims (8)

1. The utility model provides a four-wheel independent drive vehicle steering gear, its characterized in that, includes casing, rack and drive assembly, drive assembly passes casing and rack engagement, the rack has first end and second end, first end removes to be located inside the casing, the second end stretches out the casing and is connected with the bulb seat, the bulb seat is equipped with the second stopper, the casing inner peripheral wall is equipped with first lug and second lug, first end periphery is equipped with first stopper, first stopper and casing inner peripheral wall slide are supported and are leaned on, when drive assembly drive rack removed, first stopper supports with first lug each other, perhaps supports with the second lug each other.

2. The steering gear of four-wheel independent drive vehicle according to claim 1, wherein a bushing is further provided in the housing, the closed end of the housing is a closed end, the open end is an open end, two ends of the bushing respectively abut against the closed end and the first bump, and the first stopper is slidably engaged with an inner peripheral wall of the bushing.

3. The four-wheel independent drive vehicle steering gear according to claim 1, wherein the ball seat comprises a ball shank and a ball seat, the ball shank is detachably connected with the second end, the ball seat has a groove for accommodating the ball head, and the second stopper is provided on the outer peripheral wall of the ball seat.

4. A four wheel independently driven vehicle steering gear according to claim 3, wherein the second end is provided with internal screw threads and the knob is provided with external screw threads which mate with the internal screw threads or the knob is connected to the second end by a pin.

5. The four-wheel independently driven vehicle steering gear of claim 1, wherein the drive assembly comprises a motor, a worm gear, a worm and a gear shaft, the motor is connected with the worm, the worm is meshed with the worm gear, the worm gear is sleeved on the gear shaft, the gear shaft is meshed with the rack, and the gear shaft is located between the first bump and the second bump.

6. The four-wheel independent drive vehicle steering gear according to claim 1, wherein balls are embedded in the outer peripheral wall of the first stopper.

7. The four-wheel independent drive vehicle steering gear according to claim 1, wherein the first stopper and the first bump are provided with a cushion on the same side as the second stopper and the second bump.

8. The four-wheel independent drive vehicle steering gear according to claim 1, wherein one side of the rack is provided with gear teeth, the other side of the rack is respectively in sliding abutment with the first lug and the second lug, the outer peripheral wall of the first end of the rack is provided with threads, and the first limiting block is detachably connected with the first end through the threads.