CN209454837U - Steering system for vehicle and the vehicle with it - Google Patents

Abstract

The utility model discloses a kind of steering system for vehicle and the vehicle with it, steering system includes: steering mechanism, servomechanism and clearance adjustment mechanism.Steering mechanism has the rack gear extended in a lateral direction；The back side of rack gear is arranged in servomechanism, and servomechanism has the gear shaft being engaged with rack；Clearance adjustment mechanism is at least partially disposed on servomechanism, and clearance adjustment mechanism is connected with gear shaft, and clearance adjustment mechanism can apply radial pressure to gear shaft, to reduce the gap between gear shaft and rack gear.Steering system according to the present utility model, design of part is simple, low manufacture cost, can maximally utilize chassis space, solves the problems, such as that clearance adjustment mechanism cannot be arranged in rack gear back due to space limitation etc..

Description

Steering system for vehicle and the vehicle with it

Technical field

The utility model relates to technical field of vehicle, more particularly, to a kind of steering system for vehicle and with its Vehicle.

Background technique

Hydraulic power-assisted steering to electric power steering regenerate during, due to the chassis space of every kind of automobile it is not identical Need to occupy main casing space since clearance adjustment mechanism is arranged in the rack gear back side during arrangement electric power steering.To Cause electric power steering monnolithic case larger.And the quantity of clearance adjustment mechanism components used at present is more, cost Relatively high past contact needs a set of dedicated gap to adjust equipment.In order to facilitate producer's arrangement electric power steering the outer of entirety Shape size becomes smaller and in order to reduce the quantity of components, cost and equipment, needs to improve existing overall structure.

Utility model content

The utility model aims to solve at least one of the technical problems existing in the prior art.For this purpose, the utility model One purpose is to propose a kind of steering system for vehicle, and the steering system, design of part is simple, low manufacture cost, Chassis space can be maximally utilized, rack gear back cannot be arranged in by solving the clearance adjustment mechanism due to space limitation etc. The problem of.

In order to achieve the above objectives, the technical solution of the utility model is achieved in that

A kind of steering system for vehicle, comprising: steering mechanism, servomechanism and clearance adjustment mechanism.The steering Mechanism has the rack gear extended in a lateral direction；The back side of the rack gear, the servomechanism is arranged in the servomechanism With with the rack gear meshed gears axis；The clearance adjustment mechanism is at least partially disposed on the servomechanism, institute Clearance adjustment mechanism to be stated to be connected with the gear shaft, the clearance adjustment mechanism can apply radial pressure to the gear shaft, To reduce the gap between the gear shaft and the rack gear.

One embodiment according to the present utility model, the clearance adjustment mechanism include: eccentric guide sleeve, the bias guide sleeve It is set on the gear shaft, the bias guide sleeve has pivot center, the rotary shaft of the pivot center and the gear shaft Line is overlapped.

Further, the eccentric guide sleeve includes: eccentric guide sleeve body, and the bias guide sleeve body is set in the gear On axis, the bias guide sleeve body is the ring structure being made of the first eccentric part of arc and the second eccentric part of arc.

Further, the center of circle of first eccentric part is located on the rotation axis of the gear shaft, and described second is eccentric The angle α of the line and vertical direction in the center of circle in portion and the center of circle of first eccentric part is acute angle.

Further, the line and vertical direction in the center of circle of the center of circle of second eccentric part and first eccentric part 45 ° of angle α <.

Further, the eccentric guide sleeve further include: cantilever, the cantilever is from the eccentric guide sleeve body to far from described The direction of gear shaft extends, and the free end of the cantilever is provided with compensation mechanism.

Further, the compensation mechanism is arranged in eccentric guide sleeve accommodating chamber, the compensation mechanism include: elastic component and Lock piece, the elastic component are flexibly pressed on the bottom of the cantilever, and the lock piece and the eccentric guide sleeve accommodating chamber are solid Elastic force fixed, that the lock piece is used to that the elastic component to be kept to apply the cantilever.

Further, further includes: inner bearing and outer bearing, inner bearing setting is in the eccentric guide sleeve body and described Between gear shaft, the outer bearing is embedded in the eccentric guide sleeve accommodating chamber, and the outer bearing sleeve is located at the bias and leads Cover the outer peripheral surface of ontology.

Further, the outer bearing uses the wear-resistant material with self-lubricating property.

Compared with the existing technology, the steering system described in the utility model for vehicle, the steering system, part knot Structure is simple, low manufacture cost, can maximally utilize chassis space, solves the clearance adjustment mechanism due to space limitation etc. The problem of rack gear back cannot be arranged in.

The another object of the utility model is to propose a kind of vehicle, which includes the steering system of above-mentioned first aspect System.The vehicle is identical as advantage possessed by the steering system, and details are not described herein.

The additional aspect and advantage of the utility model will be set forth in part in the description, partially will be from following description In become obvious, or recognized by the practice of the utility model.

Detailed description of the invention

The attached drawing for constituting a part of the utility model is used to provide a further understanding of the present invention, this is practical new The illustrative embodiments and their description of type are not constituteed improper limits to the present invention for explaining the utility model.? In attached drawing:

Fig. 1 is steering system structural top view described in the utility model embodiment；

Fig. 2 is steering system structural main view described in the utility model embodiment；

Fig. 3 is rack-and-pinion clearance adjustment mechanism schematic diagram described in the utility model embodiment；

Fig. 4 is the composition figure of clearance adjustment mechanism described in the utility model embodiment；

Fig. 5 is clearance adjustment mechanism sectional view described in the utility model embodiment；

Fig. 6 is eccentric guide sleeve mechanism schematic diagram described in the utility model embodiment；

Fig. 7 is outer bearing schematic diagram described in the utility model embodiment.

Description of symbols:

100- steering system, 1- steering mechanism, 11- rack gear, 2- servomechanism, 21- gear shaft, 3- clearance adjustment mechanism, 31- bias guide sleeve, 32- bias guide sleeve body, the first eccentric part of 321-, the second eccentric part of 322-, 33- cantilever, 34- bias guide sleeve Accommodating chamber, 4- compensation mechanism, 41- elastic component, 42- lock piece, 5- inner bearing, 6- outer bearing, 71- steering wheel, 72- steering shaft, 73- pull rod, 74- wheel, 75- worm gear, 76- worm screw, 77- motor, 79- cover board, 80- screw, 81- screw installing port, 82- are manual Gear shaft.

Specific embodiment

The embodiments of the present invention are described below in detail, examples of the embodiments are shown in the accompanying drawings, wherein from beginning Same or similar element or element with the same or similar functions are indicated to same or similar label eventually.Below by ginseng The embodiment for examining attached drawing description is exemplary, and is only used for explaining the utility model, and should not be understood as to the utility model Limitation.

In the description of the present invention, it should be understood that term " center ", " longitudinal direction ", " transverse direction ", " length ", " width Degree ", " thickness ", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outside", The orientation or positional relationship of the instructions such as " clockwise ", " counterclockwise ", " axial direction ", " radial direction ", " circumferential direction " is based on the figure Orientation or positional relationship is merely for convenience of describing the present invention and simplifying the description, rather than the dress of indication or suggestion meaning It sets or element must have a particular orientation, be constructed and operated in a specific orientation, therefore should not be understood as to the utility model Limitation.

Below with reference to Fig. 1-Fig. 7 description according to the steering system 100 for vehicle of the utility model embodiment.Such as Fig. 1- It may include: steering mechanism 1, servomechanism 2 and gap according to the steering system 100 of the utility model embodiment shown in Fig. 2 Adjustment mechanism 3.

One embodiment according to the present utility model, steering mechanism 1 may include the steering wheel 71 operated by driver, with The operation cooperation of steering wheel 71 and rotate steering shaft 72, via the manual gear axis 82 of the lower section of steering shaft 72 and in lateral side The rack gear 11 upwardly extended.The conduction of rotation is achieved in that driver can be by hand-power steering wheel rotation 71, steering wheel 71 can drive steering shaft 72 to rotate, and steering shaft 72 drives manual gear axis 82 to rotate, to make manual gear axis 82 and rack gear 4 Engaged transmission.

Further, servomechanism 2 may include motor 77, worm screw 76, worm gear 75, gear shaft 21.Specifically, such as Fig. 2 Shown, the back side of rack gear 11 is arranged in servomechanism 2, and servomechanism 2 has and 11 meshed gears axis 21 of rack gear, 76 energy of worm gear It is enough to be rotatably connected to gear shaft 21.Further, the torque sensor (unmarked in figure) of steering wheel 71 can detecte worm gear 76 torques generated.According to the torque detected, motor 77 is passed to, motor 77 acts.Therefore, the torque generated of motor 77 Rack gear 11 be transferred to as driver via worm gear 75 and gear shaft 21 be applied to the auxiliary force of the operating force of steering wheel 71, thus Power-assisted is provided to turn to, so that driver applies lesser torque to steering wheel 71, Vehicular turn just can be driven, reach labour-saving Effect.

The clearance adjustment mechanism 3 of the utility model embodiment is at least partially disposed on servomechanism 2, that is to say, that Clearance adjustment mechanism 3 can be positioned only on servomechanism 2, and certainly, in further embodiments, clearance adjustment mechanism 3 can be with It is arranged on servomechanism 2 and manual steering mechanism 1 simultaneously, more arrives better labor-saving effect and gap adjustment effect to reach Fruit.

Further, as shown in figure 4, clearance adjustment mechanism 3 may include gear shaft 21, compensation mechanism 4, cover board 79 and Screw 80.Specifically, by taking clearance adjustment mechanism 3 is arranged on servomechanism 2 as an example, clearance adjustment mechanism 3 and 21 phase of gear shaft Even, clearance adjustment mechanism 3 can apply radial pressure to gear shaft 21, thus between reducing between gear shaft 21 and rack gear 11 Gap.

According to the steering system 100 of the utility model embodiment, design of part is simple, low manufacture cost, can maximize Using chassis space, solve the problems, such as that clearance adjustment mechanism 3 cannot be arranged in 11 back of rack gear due to space limitation etc..

One embodiment according to the present utility model, as shown in fig. 6, clearance adjustment mechanism 3 can also include: eccentric guide sleeve 31, eccentric guide sleeve 31 can be set on gear shaft 21, and eccentric guide sleeve 31 has pivot center, pivot center and gear shaft 21 Rotation axis coincident.Optionally, the material of eccentric guide sleeve 13 can be made of wear-resisting and self-lubricating material, such as can be powder Last metallurgy, the coefficient of friction of eccentric guide sleeve 13 is small and wear-resistant during rotation as a result, is conducive to raising bias in this way and leads The service life of set 13.

Further, as shown in fig. 6, eccentric guide sleeve 31 includes: eccentric guide sleeve body 32, eccentric guide sleeve body 32 is set in On gear shaft 21, eccentric guide sleeve body 32 is the ring being made of the first eccentric part 321 of arc and the second eccentric part 322 of arc Shape structure.

Further, eccentric guide sleeve 31 further include: cantilever 33, cantilever 33 is from eccentric guide sleeve body 32 to far from gear shaft 21 Direction extend, and the free end of cantilever 33 is provided with compensation mechanism 4.Further, the setting of compensation mechanism 4 is held in eccentric guide sleeve It receives in chamber 34, compensation mechanism 4 may include: elastic component 41 and lock piece 42.Optionally, elastic component 41 can be spring, locking Part 42 can be nut.Further, elastic component 41 is flexibly pressed on the bottom of cantilever 33, and lock piece 42 and eccentric guide sleeve hold Chamber 34 of receiving is fixed, the elastic force that lock piece 42 is used to that elastic component 41 to be kept to apply cantilever 33.One according to the present utility model Embodiment passes through spring force as shown in fig. 6, lock piece 42 is set as F3 by the elastic force that elastic component 41 applies cantilever 33 F3 can be such that eccentric guide sleeve 31 rotates along the center of circle of gear shaft 21.When gear shaft 21 and rack gear 11 produce during engaged transmission When raw gap, spring force F3 pushes cantilever 33 to make eccentric guide sleeve 31 rotate along gear shaft 21, to make 21 meeting of gear shaft Generate a F_{It closes}Power.Further, the circle of the first eccentric part 321 is located on the rotation axis of gear shaft 21, and second is eccentric The angle α of the line and vertical direction in the center of circle in portion 322 and the center of circle of the first eccentric part 321 is acute angle.Further, second partially 45 ° of angle α < of the line and vertical direction in the center of circle of center portion 322 and the center of circle of the first eccentric part 321.Specifically, gear shaft The 21 F conjunctions generated can be decomposed into F1 in the horizontal direction, can be decomposed into F2 in vertical direction, since angle α is acute angle, because This F2 is greater than F1.One embodiment according to the present utility model, such as α are 30 °, and the numerical value of such F2 is twice of F1.Into one Step ground, due to there is the presence of α angle that can generate the radial force of a F2.F2 will push gear shaft 21 and eliminate gear shaft 21 and rack gear The gap that 11 engagements generate.To make rack gear 11 and gear shaft 21 be always maintained at the stationarity that tight mesh guarantees transmission, partially The length of the cantilever 33 of heart guide sleeve 31 and the size of the spring force of elastic component 41 can mutually make up.

Further, clearance adjustment mechanism 3 can also include: inner bearing 5 and outer bearing 6, and inner bearing 5 (can be needle roller Bearing) it is arranged between eccentric guide sleeve body 32 and gear shaft 21, outer bearing 6 is embedded in eccentric guide sleeve accommodating chamber 34, and outer Bearing 6 is set in the outer peripheral surface of eccentric guide sleeve body 32.Further, outer bearing 6 is using the wear-resisting material with self-lubricating property Material.For example, having and rubbing as shown in fig. 7, one embodiment according to the present utility model, outer bearing 6 can be made of PTFE coating The characteristics of wiping coefficient small self-lubricating.For example, coefficient of friction can be 0.1.Specifically, it is between each part of clearance adjustment mechanism 3 Connection is achieved: lock piece 42, which is tightened, makes the compression of elastic component 41 compress eccentric guide sleeve 31, and inner bearing 5 is fitted in eccentric guide sleeve 31 the insides, outer bearing 6 are fitted in eccentric guide sleeve accommodating chamber 34, and eccentric guide sleeve 31 is fitted in 6 the inside of outer bearing, and eccentric guide sleeve 31 can To be rotated with inner bearing 5.

Below with reference to Fig. 1-Fig. 7 detailed description according to the specific works mistake of the steering system 100 of the utility model embodiment Journey:

As shown in Fig. 1-Fig. 7, clearance adjustment mechanism 3 is arranged in the lower end of gear shaft 21 and manual gear axis 82.When The rotation of motor 77 drives worm screw 76 to rotate, worm screw 76 and worm gear 75 engaged transmission band movable gear shaft 21 and 82 turns of manual gear axis Dynamic, gear shaft 21 moves along a straight line with carry-over bar 11.Due to 11 engaged transmission mistake of gear shaft 21, manual gear axis 82 and rack gear Cheng Zhonghui is moved along 11 radial direction of rack gear, so that back lash can be generated.The presence in gap can generate abnormal sound and shake, when The spring force of elastic component 41 (such as spring) pushes eccentric guide sleeve 31 to rotate along 21 center of gear shaft when generating gap.Bias is led It will push gear shaft 21 while 31 rotation of set to move to nibble with rack gear 11 to eliminate gear shaft 21 along 11 radial direction of rack gear Close the gap generated in transmission process, it is ensured that the stationarity that gear shaft 21 is engaged with rack gear 11, to turn for driver Preferable feel is brought when to vehicle.

The another object of the utility model is to propose a kind of vehicle, which includes the steering system of above-mentioned first aspect 100.The vehicle is identical as advantage possessed by the steering system 100, and details are not described herein.

The above is only the preferred embodiment of the utility model only, is not intended to limit the utility model, all at this Within the spirit and principle of utility model, any modification, equivalent replacement, improvement and so on should be included in the utility model Protection scope within.

Claims (10)

1. a kind of steering system (100) for vehicle characterized by comprising

Steering mechanism (1), the steering mechanism (1) have the rack gear (11) extended in a lateral direction；

Servomechanism (2), the servomechanism (2) setting at the back side of the rack gear (11), the servomechanism (2) have with Rack gear (11) the meshed gears axis (21)；

Clearance adjustment mechanism (3), the clearance adjustment mechanism (3) is at least partially disposed on the servomechanism (2), described Clearance adjustment mechanism (3) is connected with the gear shaft (21), and the clearance adjustment mechanism (3) can apply the gear shaft (21) Add radial pressure, to reduce the gap between the gear shaft (21) and the rack gear (11).

2. the steering system (100) according to claim 1 for vehicle, which is characterized in that the clearance adjustment mechanism It (3) include: eccentric guide sleeve (31), the bias guide sleeve (31) is set on the gear shaft (21), the bias guide sleeve (31) With pivot center, the rotation axis coincident of the pivot center and the gear shaft (21).

3. the steering system (100) according to claim 2 for vehicle, which is characterized in that the bias guide sleeve (31) It include: eccentric guide sleeve body (32), the bias guide sleeve body (32) is set on the gear shaft (21), the bias guide sleeve Ontology (32) is the ring structure being made of the first eccentric part (321) of arc and the second eccentric part (322) of arc.

4. the steering system (100) according to claim 3 for vehicle, which is characterized in that first eccentric part (321) the center of circle is located on the rotation axis of the gear shaft (21), the center of circle and described first of second eccentric part (322) The line in the center of circle of eccentric part (321) and the angle α of vertical direction are acute angle.

5. the steering system (100) according to claim 4 for vehicle, which is characterized in that second eccentric part (322) 45 ° of angle α < of the line and vertical direction in the center of circle and the center of circle of first eccentric part (321).

6. the steering system (100) according to claim 3 for vehicle, which is characterized in that the bias guide sleeve (31) Further include: cantilever (33), the cantilever (33) is from the eccentric guide sleeve body (32) to the direction far from the gear shaft (21) Extend, and the free end of the cantilever (33) is provided with compensation mechanism (4).

7. the steering system (100) according to claim 6 for vehicle, which is characterized in that the compensation mechanism (4) sets It sets in eccentric guide sleeve accommodating chamber (34), the compensation mechanism (4) includes: elastic component (41) and lock piece (42), the elasticity Part (41) is flexibly pressed on the bottom of the cantilever (33), and the lock piece (42) and the eccentric guide sleeve accommodating chamber (34) are solid Elastic force fixed, that the lock piece (42) is used to that the elastic component (41) to be kept to apply the cantilever (33).

8. the steering system (100) according to claim 7 for vehicle, which is characterized in that further include: inner bearing (5) With outer bearing (6), the inner bearing (5) is arranged between the eccentric guide sleeve body (32) and the gear shaft (21), described Outer bearing (6) is embedded in the eccentric guide sleeve accommodating chamber (34), and the outer bearing (6) is set in the eccentric guide sleeve body (32) outer peripheral surface.

9. the steering system (100) according to claim 8 for vehicle, which is characterized in that the outer bearing (6) uses Wear-resistant material with self-lubricating property.

10. a kind of vehicle, which is characterized in that including the steering system according to claim 1 to 9 for vehicle It unites (100).