CN209064179U - Steering system - Google Patents

Abstract

The utility model discloses a kind of steering systems, comprising: worm screw, motor and damping device.The motor has motor output shaft, and the motor output shaft is axially connect with the worm screw；The damping device is arranged between the motor output shaft and the worm screw.The steering system is provided with damping device between motor output shaft and worm screw, vibration between the two can be effectively reduced, and then it may filter that the vibration axially and radially generated that motor generates in the process of running, thus by the low vibration being transmitted on steering wheel, and then improve operating handle, and effectively improve the NVH performance of vehicle.

Description

Steering system

Technical field

The utility model relates to technical field of vehicle, in particular to a kind of steering system.

Background technique

Transmission between the motor output shaft and worm screw of the steering system of existing vehicle is mostly spline drived mode, is passed herein Do not have shock-damping structure in flowing mode, between motor output shaft and worm screw or only exist circumferential vibration damping form, causes therebetween It is vibrated in transmission process, and this vibration can be transmitted to steering wheel, influence driver's operating handle, and can generate vibration and make an uproar Sound, there are rooms for improvement.

Utility model content

In view of this, the utility model is directed to a kind of steering system, vibration caused by the steering system is less.

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

A kind of steering system, comprising: worm screw；Motor, the motor have motor output shaft, the motor output shaft and institute Worm screw is stated axially to connect；Damping device, the damping device are arranged between the motor output shaft and the worm screw.

Further, the damping device includes: axial damping device and circumferential damping device, and the axial damping device is used In carrying out damping to the motor output shaft and the worm screw in the axial direction in the worm screw, the circumferential direction damping device is used for Damping is carried out to the motor output shaft and the worm screw in the circumferential direction of the worm screw.

Further, the damping device includes: upper padding plate, lower bolster and is folded in the upper padding plate and the lower bolster Between resilient cushion, the outside wall surface of the upper padding plate is provided with upper padding plate damping cap, and the outside wall surface of the lower bolster is provided with down Backing plate damping cap, the upper padding plate damping cap are only supported with the worm screw, and the lower bolster resilient cushion stops with the motor output shaft It supports, the upper padding plate damping cap and the lower bolster damping cap composition axial damping device, described in the resilient cushion composition Circumferential damping device.

Further, the inner wall of the lower bolster is provided with the multiple claws extended towards the upper padding plate, the upper pad Plate has card hole, and multiple claws are adapted to pass through the resilient cushion and cooperate with the card hole and are clamped.

Further, the inner wall of the upper padding plate is provided with the first positioning column extended towards the lower bolster, under described The inner wall of backing plate is provided with the second positioning column extended towards the upper padding plate, and the lower bolster, which has, runs through its own thickness First positioning hole, the upper padding plate has the second location hole through its own thickness, and first positioning column is adapted to pass through The first positioning hole is simultaneously fixed with the lower bolster resilient cushion, and second positioning column is adapted to pass through the second location hole simultaneously It is fixed with the upper padding plate resilient cushion.

Further, the worm screw has worm screw bottom plate, and the motor output shaft has output shaft bottom plate, and the upper padding plate subtracts Shake cap is only supported with the worm screw bottom plate, and the lower bolster resilient cushion is only supported with the motor output shaft bottom plate, the worm screw bottom plate With the multiple worm screw claws extended towards the output shaft bottom plate, the output shaft bottom plate has to be prolonged towards the worm screw bottom plate The multiple output shaft claws stretched, the worm screw claw and the output shaft claw are adapted to fit in the outer peripheral surface of the damping device On card slot in.

Further, there is the first damping gap, the output shaft card between the worm screw claw and the output shaft bottom plate There is the second damping gap between pawl and the worm screw bottom plate.

Further, the upper padding plate includes: upper padding plate ontology and dissipates the more of setting outward from the upper padding plate ontology A upper padding plate claw, the lower bolster include: lower bolster ontology and dissipate the multiple of setting outward from the lower bolster ontology Lower bolster claw, the resilient cushion include: damping pad body and dissipate the multiple of setting outward from the damping pad body and subtract Shake pad claw, the face setting up and down of the upper padding plate claw, the lower bolster claw and the resilient cushion claw.

Further, the worm screw claw and the output shaft claw axially offset setting, and the worm screw claw is suitable for wearing Gap between a part of two neighboring resilient cushion claw, the output shaft claw are suitable for wearing another part two neighboring Gap between the resilient cushion claw, and the same institute of sandwiched between the adjacent worm screw claw and the output shaft claw State resilient cushion claw.

Further, two lateral surfaces of worm screw claw phase with the resilient cushion claw of worm screw claw two sides respectively Inner surface sides fitting setting, two lateral surfaces of output shaft claw resilient cushion pawl with output shaft claw two sides respectively The relative inner face paste in portion closes setting, and the width of the resilient cushion claw is greater than the width and lower bolster of the upper padding plate claw The width of claw.

Compared with the existing technology, steering system described in the utility model has the advantage that

(1) steering system described in the utility model, which is provided between motor output shaft and worm screw subtracts Device is shaken, vibration between the two can be effectively reduced, and then may filter that the axially and radially production that motor generates in the process of running Raw vibration, thus by the low vibration being transmitted on steering wheel, and then improve operating handle, and effectively improve vehicle NVH performance.

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 the structural schematic diagram according to the steering system of the utility model embodiment；

Fig. 2 is the partial structurtes enlarged drawing of Fig. 1；

Fig. 3 is the steering system partial exploded view according to the utility model embodiment；

Fig. 4 is the steering system partial exploded view according to the utility model embodiment；

Fig. 5 is the steering system partial exploded view according to the utility model embodiment；

Fig. 6 is the structural schematic diagram according to the damping device of the utility model embodiment；

Fig. 7 is the explosive view according to the damping device of the utility model embodiment；

Fig. 8 is the structural schematic diagram according to the damping device of the utility model embodiment；

Fig. 9 is the sectional view of the A-A along Fig. 8.

Description of symbols:

100- steering system, 1- worm screw, 2- motor, 21- motor output shaft, 3- damping device, 31- upper padding plate, 32- underlay Plate, 33- resilient cushion, 34- upper padding plate damping cap, 35- lower bolster damping cap, 321- claw, 311- card hole, 312- first are positioned Column, the second positioning column of 322-, 323- first positioning hole, 313- second location hole, 11- worm screw bottom plate, 211- output shaft bottom plate, 12- worm screw claw, 212- output shaft claw, the first damping of 4- gap, the second damping of 5- gap, 314- upper padding plate ontology, 315- Upper padding plate claw, 324- lower bolster ontology, 325- lower bolster claw, 331- damping pad body, 332- resilient cushion claw, 121- snail Two lateral surfaces of bar claw, two lateral surfaces of 2121- output shaft claw, the relative inner face of 3321- resilient cushion claw.

Specific embodiment

It should be noted that in the absence of conflict, the feature in the embodiments of the present invention and embodiment can To be combined with each other.

Below with reference to Fig. 1-Fig. 9 description according to the steering system 100 of the utility model embodiment.

Steering system 100 according to the utility model embodiment may include: worm screw 1, motor 2 and damping device 3.

As Figure 1-Figure 5, motor 2 has motor output shaft 21, and motor output shaft 21 is axially connect with worm screw 1.It is passing Motor output shaft 21 is generally attached using spline with worm screw 1 in system steering system, and due to motor output shaft 21 and worm screw 1 Machining and assembly precision there are error, cause the concentricity and worm screw 1 and motor casing of motor output shaft 21 and worm screw 1 The verticality in body end face generates deviation, causes worm screw 1 and motor output shaft 21 to generate retardance and vibration when being driven, to accelerate The abrasion of worm and gear 1 and the abrasion of region of interest bearing, greatly shorten worm and gear 1 and the service life of motor 2 all, and And abnormal sound can be also generated along with the abrasion of spline.

For this purpose, the utility model embodiment is provided with damping device 3, and damping device 3 is set in motor output shaft 21 Between worm screw 1.Damping device 3 can carry out bumper and absorbing shock to motor output shaft 21 and worm screw 1 on axial and circumferential, make motor Stable transmission is able to carry out between output shaft 21 and worm screw 1.

According to the steering system 100 of the utility model embodiment, the steering system 100 is in motor output shaft 21 and worm screw 1 Between be provided with damping device 3, vibration between the two can be effectively reduced, and then may filter that motor 2 generates in the process of running The vibration axially and radially generated, thus by the low vibration being transmitted on steering wheel, and then improve operating handle, and effective Improve the NVH performance of vehicle.

Some embodiments according to the present utility model, damping device 3 include: axial damping device 3 and circumferential damping device 3, axial damping device 3 is used to carry out damping, circumferential damping device 3 to motor output shaft 21 and worm screw 1 in the axial direction of worm screw 1 For carrying out damping to motor output shaft 21 and worm screw 1 in the circumferential direction of worm screw 1.The damping device 3 can be simultaneously to motor as a result, Output shaft 21 and worm screw 1 carry out the damping on axial and circumferential, and then connection and transmission between the two can be made more stable.

In conjunction with Fig. 1-embodiment illustrated in fig. 9, damping device 3 includes: upper padding plate 31, lower bolster 32 and is folded in upper padding plate Resilient cushion 33 between 31 and lower bolster 32, the outside wall surface of upper padding plate 31 are provided with upper padding plate damping cap 34, lower bolster 32 it is outer Wall surface is provided with lower bolster damping cap 35, and upper padding plate damping cap 34 is only supported with worm screw 1, and 32 resilient cushion 33 of lower bolster is exported with motor Axis 21 only supports, and upper padding plate damping cap 34 and lower bolster damping cap 35 constitute axial damping device 3, and resilient cushion 33 constitutes circumferential damping Device 3.In other words, upper padding plate damping cap 34 and lower bolster damping cap 35 along axial direction be folded in motor output shaft 21 and worm screw 1 it Between, damping processing is carried out to the two in the axial direction.And resilient cushion 33 is then for carrying out circumferential subtract to motor output shaft 21 and worm screw 1 Shake processing, that is, damping is carried out to the two during circumferentially rotating in the two, wherein due to resilient cushion 33 also indirect edge It is axially folded between motor output shaft 21 and worm screw 1, therefore resilient cushion 33 also plays certain buffering to the two in the axial direction Cushioning effect.

Preferably, upper padding plate damping cap 34, lower bolster damping cap 35 and resilient cushion 33 can be used rubber material and be made, no Only low cost, convenient for manufacture, and buffering and damping effect is good.And upper padding plate 31, lower bolster 32 then need to be made of plastic material, So that upper padding plate 31 and lower bolster 32 can play better supporting role to upper padding plate damping cap 34 and lower bolster damping cap 35, And can it is more stable securely by 33 sandwiched of resilient cushion between, and then guarantee damping device 3 integral strength so that its Setting that can be more stable is between motor output shaft 21 and worm screw 1.

As shown in Fig. 6, Fig. 7 and Fig. 9, the inner wall of lower bolster 32 is provided with the multiple claws extended towards upper padding plate 31 321, upper padding plate 31 has card hole 311, and multiple claws 321 are adapted to pass through resilient cushion 33 and cooperate with card hole 311 and are clamped.Pass through card Pawl 321 tightens together three with the snap-fit of card hole 311, thus fixed effect can be made more preferable, and can also keep away Exempt to install unnecessary fastener additional, thereby reduces vehicle cost.

Wherein, multiple claws 321 are suitable for circumferentially equidistantly distributed, thus claw 321 can be enable to cooperate with card hole 311 Clamping it is more stable, keep fastening force suffered by 3 each section of damping device more uniform, to guarantee its own stability, in turn It ensure that the stability of entire steering system 100.

Referring to Fig. 7 and Fig. 9, the inner wall of upper padding plate 31 is provided with the first positioning column 312 extended towards lower bolster 32, under The inner wall of backing plate 32 is provided with the second positioning column 322 extended towards upper padding plate 31, and lower bolster 32 has thick through its own The first positioning hole 323 of degree, upper padding plate 31 have the second location hole 313 through its own thickness, and the first positioning column 312 is suitable for Across first positioning hole 323 and fixed with 32 resilient cushion 33 of lower bolster, the second positioning column 322 is adapted to pass through second location hole 313 And it is fixed with 31 resilient cushion 33 of upper padding plate.Pass through the location fit of the first positioning column 312 and first positioning hole 323 and the as a result, The location fit of two positioning columns 322 and second location hole 313 upper padding plate 31 and lower bolster 32 to be accurately combined together, with The assembling fastening of damping device 3 is completed, and then the speed of installation personnel assembling damping device 3 can be accelerated, improves whole steering The throughput rate of system 100.

Meanwhile first positioning column 312 and the second positioning column 322 be also upper padding plate damping cap 34, lower bolster damping cap 35 mentions It has supplied that fixed point is installed, can avoid being individually for upper padding plate damping cap 34, the fixed point of the setting of lower bolster damping cap 35 or increase The promotion of 3 overall cost of damping device caused by fixing piece, and then effectively reduce the cost of vehicle.

In conjunction with Fig. 2-embodiment illustrated in fig. 5, worm screw 1 has worm screw bottom plate 11, and motor output shaft 21 has output shaft bottom plate 211, upper padding plate damping cap 34 is only supported with worm screw bottom plate 11, and 32 resilient cushion 33 of lower bolster is only supported with 21 bottom plate of motor output shaft, by This realizes the axial damping effect to motor output shaft 21 and worm screw 1.

Wherein, worm screw bottom plate 11 has the multiple worm screw claws 12 extended towards output shaft bottom plate 211, output shaft bottom plate 211 have the multiple output shaft claws 212 extended towards worm screw bottom plate 11, and worm screw claw 12 and output shaft claw 212 are suitable for matching It closes in the card slot on the outer peripheral surface of damping device 3.It is filled as a result, by worm screw claw 12 and output shaft claw 212 and damping The circumferential cooperation for setting 3 card slot realizes damping device 3 to the circumferential cushioning effect of motor output shaft 21 and worm screw 1.

Further, between worm screw claw 12 and output shaft bottom plate 211 have the first damping gap 4, output shaft claw 212 with There is the second damping gap 5 between worm screw bottom plate 11.Thereby it is ensured that output shaft bottom plate 211 and worm screw bottom plate 11 are in the axial direction With cushion space, and then upper padding plate damping cap 34 and lower bolster damping cap 35 is enable to play cushioning effect.

As shown in Fig. 6-Fig. 9, upper padding plate 31 includes: upper padding plate ontology 314 and diverging is set outward from upper padding plate ontology 314 The multiple upper padding plate claws 315 set, lower bolster 32 includes: lower bolster ontology 324 and diverging is set outward from lower bolster ontology 324 The multiple lower bolster claws 325 set, resilient cushion 33 includes: damping pad body 331 and diverging is set outward from damping pad body 331 The multiple resilient cushion claws 332 set, upper padding plate claw 315, lower bolster claw 325 and the setting of about 332 face of resilient cushion claw. In other words, upper padding plate claw 315, lower bolster claw 325 and about 332 resilient cushion claw overlap, and two adjacent weights It is above-mentioned card slot between folded part, is more convenient for worm screw claw 12 as a result, and the cooperation of output shaft claw 212 is inserted into card slot It is interior.

In conjunction with Fig. 2-embodiment illustrated in fig. 9, worm screw claw 12 and output shaft claw 212 axially offset setting, worm screw claw 12 are suitable for wearing the gap between a part of two neighboring resilient cushion claw 332, and output shaft claw 212 is suitable for wearing another part Gap between two neighboring resilient cushion claw 332, and sandwiched is same between adjacent worm screw claw 12 and output shaft claw 212 A resilient cushion claw 332.Thus make all to be folded with damping between adjacent any two worm screw claw 12 and output shaft claw 212 Claw 332 is padded, the circumferential damping effect of damping device 3 further can be effectively promoted.

- Fig. 9 referring to Fig.1, two lateral surfaces 121 of worm screw claw 12 resilient cushion claw with 12 two sides of worm screw claw respectively Relative inner face 3321 be bonded setting, two lateral surfaces 2121 of output shaft claw 212 respectively with 212 two sides of output shaft claw Resilient cushion claw relative inner face 3321 be bonded setting.In other words, worm screw claw 12, resilient cushion claw 332 and output Axis claw 212 continuously fits closely setting, to guarantee traditional reaction time, avoids that showing for 100 power-assisted of steering system delay occurs As.

Further, the width of resilient cushion claw 332 is greater than the width of upper padding plate claw 315 and the width of lower bolster claw 325 Degree.I.e. when motor output shaft 21 exports small torque, output shaft claw 212 need to extruding resilient cushion claw 332 be at the first time Worm screw claw 12 and worm screw 1 can be driven to rotate, only need to work as motor output shaft by 332 filter vibration of resilient cushion claw When 21 output large torque, since twisting resistance is larger, it will lead to resilient cushion claw 332 and deform larger, 212 He of output shaft claw at this time Worm screw claw 12 can be contacted directly with upper padding plate 31 and lower bolster 32, generated rigid, hardness stop and supported connection, to improve steering system Power-assisted delay phenomenon when 100 large torques of uniting export.

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) characterized by comprising

Worm screw (1)；

Motor (2), the motor (2) have motor output shaft (21), and the motor output shaft (21) and the worm screw (1) are axial Connection；

Damping device (3), the damping device (3) are arranged between the motor output shaft (21) and the worm screw (1).

2. steering system (100) according to claim 1, which is characterized in that the damping device (3) includes: axial subtracts Device (3) and circumferential damping device (3) are shaken, the axial damping device (3) is used in the axial direction of the worm screw (1) to described Motor output shaft (21) and the worm screw (1) carry out damping, and the circumferential direction damping device (3) is used for the week in the worm screw (1) Damping is carried out to the motor output shaft (21) and the worm screw (1) upwards.

3. steering system (100) according to claim 2, which is characterized in that the damping device (3) includes: upper padding plate (31), lower bolster (32) and the resilient cushion (33) being folded between the upper padding plate (31) and the lower bolster (32), it is described The outside wall surface of upper padding plate (31) is provided with upper padding plate damping cap (34), and the outside wall surface of the lower bolster (32) is provided with lower bolster and subtracts Shake cap (35), the upper padding plate damping cap (34) and the worm screw (1), which are stopped, to be supported, lower bolster (32) resilient cushion (33) with it is described Motor output shaft (21) only supports, and the upper padding plate damping cap (34) and the lower bolster damping cap (35) constitute the axial damping Device (3), the resilient cushion (33) constitute the circumferential damping device (3).

4. steering system (100) according to claim 3, which is characterized in that the inner wall of the lower bolster (32) is arranged There are the multiple claws (321) extended towards the upper padding plate (31), the upper padding plate (31) has card hole (311), multiple described Claw (321) is adapted to pass through the resilient cushion (33) and cooperates with the card hole (311) and is clamped.

5. steering system (100) according to claim 3, which is characterized in that the inner wall of the upper padding plate (31) is arranged There is the first positioning column (312) extended towards the lower bolster (32), the inner wall of the lower bolster (32) is provided with towards institute The second positioning column (322) of upper padding plate (31) extension is stated, the lower bolster (32) has the first positioning through its own thickness Hole (323), the upper padding plate (31) have the second location hole (313) through its own thickness, first positioning column (312) It is adapted to pass through the first positioning hole (323) and, second positioning column fixed with the lower bolster (32) resilient cushion (33) (322) it is adapted to pass through the second location hole (313) and is fixed with the upper padding plate (31) resilient cushion (33).

6. steering system (100) according to claim 3, which is characterized in that the worm screw (1) has worm screw bottom plate (11), the motor output shaft (21) has output shaft bottom plate (211), the upper padding plate damping cap (34) and the worm screw bottom plate (11) it only supports, lower bolster (32) resilient cushion (33) is only supported with the motor output shaft (21) bottom plate, the worm screw bottom plate (11) there are the multiple worm screw claws (12) extended towards the output shaft bottom plate (211), the output shaft bottom plate (211) has The multiple output shaft claws (212) extended towards the worm screw bottom plate (11), the worm screw claw (12) and the output shaft card Pawl (212) is adapted to fit in the card slot on the outer peripheral surface of the damping device (3).

7. steering system (100) according to claim 6, which is characterized in that the worm screw claw (12) and the output There is the first damping gap (4), between the output shaft claw (212) and the worm screw bottom plate (11) between axis bottom plate (211) With the second damping gap (5).

8. steering system (100) according to claim 6, which is characterized in that the upper padding plate (31) includes: upper padding plate sheet Body (314) and the multiple upper padding plate claws (315) for dissipating setting outward from the upper padding plate ontology (314), the lower bolster (32) include: lower bolster ontology (324) and dissipate multiple lower bolster claws of setting outward from the lower bolster ontology (324) (325), the resilient cushion (33) includes: damping pad body (331) and diverging is arranged outward from the damping pad body (331) Multiple resilient cushion claws (332), the upper padding plate claw (315), the lower bolster claw (325) and the resilient cushion claw (332) face is arranged up and down.

9. steering system (100) according to claim 8, which is characterized in that the worm screw claw (12) and the output Axis claw (212) axially offsets setting, and the worm screw claw (12) is suitable for wearing a part of two adjacent resilient cushion pawls Gap between portion (332), the output shaft claw (212) are suitable for wearing two adjacent resilient cushion claws of another part (332) gap between, and the same institute of sandwiched between the adjacent worm screw claw (12) and the output shaft claw (212) State resilient cushion claw (332).

10. steering system (100) according to claim 8, which is characterized in that two lateral surfaces of the worm screw claw (121) it is bonded setting with the relative inner face (3321) of the resilient cushion claw of worm screw claw (12) two sides respectively, it is described defeated Two lateral surfaces (2121) of shaft claw relative inner with the resilient cushion claw of output shaft claw (212) two sides respectively Face (3321) fitting setting, and the width of the resilient cushion claw (332) be greater than the upper padding plate claw (315) width and under The width of backing plate claw (325).