CN107909991A - A kind of noise-reduction method of steering gear test noise rack mechanism loading - Google Patents
A kind of noise-reduction method of steering gear test noise rack mechanism loading Download PDFInfo
- Publication number
- CN107909991A CN107909991A CN201711393903.0A CN201711393903A CN107909991A CN 107909991 A CN107909991 A CN 107909991A CN 201711393903 A CN201711393903 A CN 201711393903A CN 107909991 A CN107909991 A CN 107909991A
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- rack
- oil
- noise
- support base
- wall
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Classifications
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- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/162—Selection of materials
Abstract
The invention discloses a kind of noise-reduction method of steering gear test noise rack mechanism loading：A) in-oil cylinder oil pocket can fill hydraulic oil by oil nozzle, and oil pocket is divided into left and right two cavitys by piston, and the hydraulic oil in two cavitys is swapped by the notch on piston ring；B) the arc-shaped rack package wall of support base is wrapped in rack so that rack cannot be moved in radial direction, and can only be moved along the axis direction of support base；Set acetal resin package wall to reduce the grating produced in rack motion process with support base friction, reduce noise；C) set acetal resin resilient bushing, reduce rack during the motion with resilient bushing friction caused by noise；Resilient bushing internal diameter is smaller than rack diameter, and an enclasping force, enlarging mechanism damping action are adds additional to rack.The present invention has the following advantages：Reduce noise, realize that oil cylinder inner rack bidirectional damper acts on.
Description
Technical field
The present invention relates to steering gear noise experimental technique field, more particularly to a kind of steering gear test noise is loaded with rack
The noise-reduction method of mechanism.
Background technology
Steering gear (or being turning machine) is very important component in automobile steering system.It transports the rotation of steering wheel
It is dynamic, the beat movement of tire is converted into, so as to fulfill the turning function of automobile.Automobile steering device is broadly divided into by assist type
Three classes：Manual steering gear, hydraulic power steering device, electric booster steering device.In today's society, especially passenger car (family expenses sedan-chair
Car) aspect, it is higher and higher to comfort level requirement by bus, just includes the requirement to noise among these.So current automobile
Corresponding noise valuation can be all carried out before formal put goods on the market.Steering gear as a critical component in automotive system,
The comfort of passenger can be directly influenced, therefore the requirement to noise is very high.
Steering gear will carry out noise situation one test and evaluation in the development phase, these most of tests are all first
Carried out on indoor rack is tested, confirmation is then transferred to vehicle and carries out relevant evaluation after meeting the requirements, so can be significantly
Reduce cost and the time of experiment.In order to preferably reproducing the situation on vehicle during platform experiment, it is desirable to corresponding
Mechanism loading provide certain damping to steering gear, to simulate stressing conditions of the steering gear under vehicle environment, so draw
The noise result come is closer to the performance under vehicle actual conditions.
Mainly had using mechanism loading in laboratory at present following several：1. hydraulic damping mechanism loading；2. electric damper
Mechanism loading；3. elastic load mechanism；4. hysteresis damper mechanism loading.No matter which kind of mechanism loading is purchased, since its work is former
All there are certain noise in itself for reason or structure.For conventional failtests, these loads disclosure satisfy that requirement of experiment.
But tested for rack noise, the level of noise of mechanism loading can directly affect greatly very much the test result of steering gear, even
The noise of mechanism loading has masked the noise of steering gear in itself completely so that experiment can not carry out.Therefore the platform of low noise
Frame mechanism loading is prior art problem to be solved.
The content of the invention
The technical problems to be solved by the invention are, in view of the deficiencies of the prior art, there is provided noise is tested in a kind of steering gear
With the noise-reduction method of rack mechanism loading, to achieve the purpose that to reduce noise, realize that oil cylinder inner rack bidirectional damper acts on.
In order to solve the above technical problems, the technical scheme is that：Noise rack load machine is tested in a kind of steering gear
The noise-reduction method of structure, the rack that the low noise rack mechanism loading includes oil cylinder, is axially movable, the rack are axial
Set through oil cylinder, one end of rack is equipped with rack mechanism for regulating tightness, and the other end of rack is equipped with position-limit mechanism, described
It is oil pocket between rack outer wall and oil cylinder inner wall, the outer wall that the rack stretches out oil cylinder one end is engaged with gear shaft, described
Rack mechanism for regulating tightness is arranged on the back of tooth of rack and pinion axis site of engagement, and the oil pocket both ends are equipped with oil sealing,
The oil sealing is arranged between rack outer wall and oil cylinder inner wall, and the oil sealing is rubber oil sea, is equipped with the oil pocket
The piston that oil pocket is divided into two cavitys on rack is socketed in, piston is equipped with piston ring, and the piston ring outer rim, which is equipped with, to be lacked
Mouthful, the piston ring is teflon piston ring, and the oil cylinder is equipped with the oil nozzle of connection oil pocket, and the rack is stretched
Go out oil cylinder one end it is movable pass through housing, the rack mechanism for regulating tightness includes support base, adjustment plug screw, described
Support base one end is equipped with rack package wall, is connected between the other end and adjustment plug screw of support base by spring, the adjustment
Plug screw is threaded on housing, and the rack package wall is and the matched arcwall of rack outer wall shape, rack parcel
Wall is acetal resin package wall, and the end of the support base is equipped with groove, and adjustment plug screw blocks end and the groove
Spring cavity is formed, the spring is arranged in spring cavity, and the housing is equipped with through hole, and the support base is arranged on logical
In hole, the adjustment plug screw side wall is threadedly coupled with the through-hole wall of housing, and the support base outer wall is equipped with annular groove,
Annular ring is equipped with annular groove, position-limit mechanism includes the resilient bushing being socketed on rack, is socketed with outside the resilient bushing
Stop collar, the internal diameter of resilient bushing are less than rack diameter, and the resilient bushing is acetal resin bushing；
The method comprises the following steps：
A) in-oil cylinder oil pocket can fill hydraulic oil by oil nozzle, then be sealed oil nozzle by sealing plug, hydraulic oil
It is entirely sealed in by oil sealing inside oil cylinder, since the material that oil sealing uses is rubber, rack is hardly produced in motion process
Oil pocket is divided into left and right two cavitys by raw noise, piston, and the hydraulic oil in two cavitys is handed over by the notch on piston ring
Change；
Gear shaft and rack are to be intermeshed, the position that can be moved axially by rotating gear shaft come adjusting gear rack, tooth
Bar during the motion can the movement with piston, due to hydraulic oil be only capable of from the notch of piston ring by, and notch size compared with
Small, fluid cannot be run through, this will produce larger oil resistance to hinder the movement of piston i.e. rack, so as to play resistance
The effect of Buddhist nun；The function of oil resistance is adjusted with regard to that can play by the size and number of notch on regulating piston ring, so as to change damping
Size；Rack can play the role of damping toward both direction movement；Teflon piston ring is soft piston ring, oily
Liquid by when can absorb a part of impact, avoid producing obvious liquid stream noise；
B) the arc-shaped rack package wall of support base is wrapped in rack so that rack cannot be moved in radial direction, and can only
Moved along the axis direction of support base；Set acetal resin package wall can reduce in rack motion process with support base friction
The grating of generation, reduces noise；
Adjustment plug screw and housing are thread fittings, rotate adjustment plug screw to adjust the reduction length of spring, spring is compressed
Deform and produce the active force of a resistance compression, this active force can be applied on support base and oppress rack so that gear teeth
Bar engages even closer, the noise of generation is collided between tooth and tooth during reduction rack and pinion engagement, while can also cause
Rack produces an extra frictional force between fulcrum bearing during the motion, increases the damping of whole mechanism；
C) set acetal resin resilient bushing, reduce rack during the motion with resilient bushing friction caused by make an uproar
Sound；Resilient bushing internal diameter is smaller than rack diameter, and an enclasping force, enlarging mechanism damping action are adds additional to rack.
The present invention uses the above method, has the following advantages：1st, notch size is smaller, and fluid cannot be run through, this is just
Larger oil resistance can be produced to hinder the movement of piston i.e. rack, so as to play the role of damping；Pass through regulating piston ring
The size and number of upper notch adjust the function of oil resistance with regard to that can play, so as to change the size of damping；Rack is transported toward both direction
It is dynamic to play the role of damping；Teflon piston ring is soft piston ring, fluid by when can absorb a part of punching
Hit, avoid producing obvious liquid stream noise；2nd, set acetal resin package wall can reduce in rack motion process with support base
Rub the grating produced, reduces noise；3rd, adjustment plug screw and housing are thread fittings, rotate adjustment plug screw to adjust spring
Reduction length, spring compression compression deformation and the active force for producing a resistance compression, this active force can be applied on support base
Oppress rack so that even closer, the collision generation between tooth and tooth during reduction rack and pinion engagement of rack and pinion engagement
Noise, while can also cause rack to produce an extra frictional force between fulcrum bearing during the motion, increase is whole
The damping of mechanism；4th, set acetal resin resilient bushing, reduce rack during the motion with resilient bushing rub institute
The noise of generation；Resilient bushing internal diameter is smaller than rack diameter, and an enclasping force, enlarging mechanism damping are adds additional to rack
Effect.
Brief description of the drawings
The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments；
Fig. 1 is the structure diagram that noise rack mechanism loading is tested in steering gear in the present invention；
Fig. 2 is oil pocket cut-away view in the present invention；
Fig. 3 is the structure chart of piston ring in the present invention；
Fig. 4 is the structure chart of middle rack mechanism for regulating tightness of the present invention；
Fig. 5 is the structure chart of position-limit mechanism in the present invention；
In Fig. 1~Fig. 5,1, rack；2nd, oil cylinder；3rd, oil pocket；4th, gear shaft；5th, oil sealing；6th, piston；7th, piston ring；8、
Notch；9th, oil nozzle；10th, stent；11st, housing；12nd, support base；13rd, adjustment plug screw；14th, spring；15th, connector；16th, elasticity lining
Set；17th, stop collar；18th, rack mechanism for regulating tightness；19th, annular ring.
Embodiment
The invention discloses a kind of noise-reduction method of steering gear test noise rack mechanism loading, as shown in Fig. 1~Fig. 5
The rack 1 that low noise rack mechanism loading includes oil cylinder 2, is axially movable, rack 1 are set axially across oil cylinder 2, rack 1
One end is equipped with rack mechanism for regulating tightness 18, and the other end of rack 1 is equipped with position-limit mechanism, 1 outer wall of rack and 2 inner wall of oil cylinder it
Between be oil pocket 3,3 both ends of oil pocket are equipped with fluid closing means.
The outer wall that rack 1 stretches out 2 one end of oil cylinder is engaged with gear shaft 4.Rack mechanism for regulating tightness be arranged on rack 1 with
On the back of tooth of 4 site of engagement of gear shaft.Fluid closing means are oil sealing 5, oil sealing 5 be arranged on 1 outer wall of rack and 2 inner wall of oil cylinder it
Between, oil sealing 5 is rubber oil sea.It is equipped with oil pocket 5 to be socketed on rack 1 and is divided to oil pocket 3 to the piston 6 for two cavitys, on piston 6
Equipped with piston ring 7,7 outer rim of piston ring is equipped with notch 8, and piston ring 7 is teflon piston ring.Oil cylinder 2 is equipped with connection oil
The oil nozzle 9 of chamber 3, oil nozzle 9 are equipped with sealing plug, and oil cylinder 2 is set over the mount 10.One end that rack 1 stretches out oil cylinder 2 is movable
Through housing 11.
Rack mechanism for regulating tightness 18 includes support base 12, adjustment plug screw 13, and 12 one end of support base is wrapped up equipped with rack
Wall, is connected, adjustment plug screw 13 is threaded in housing 11 between the other end and adjustment plug screw 13 of support base 12 by spring 14
On.It with the 1 matched arcwall of outer wall shape of rack, rack package wall is acetal resin package wall that rack package wall, which is,.Branch
The end of support seat 12 is equipped with groove, and blocking end and the groove of adjustment plug screw 13 form spring cavity, and spring 14 is arranged in spring cavity.
Housing 11 is equipped with through hole, and support base 12 is arranged in through hole, and 13 side wall of adjustment plug screw and the through-hole wall screw thread of housing 11 connect
Connect.12 outer wall of support base is equipped with annular groove, is equipped with annular ring 19 in annular groove, plays close between support base 12 and housing 11
Envelope acts on.Rack mechanism loading both ends are respectively equipped with connector 15, and rack mechanism loading is connected by connector 15 with steering gear.
Position-limit mechanism includes the resilient bushing 16 being socketed on rack 1, and stop collar 17 is socketed with outside resilient bushing 16.Elasticity
The internal diameter of bushing 16 is less than 1 diameter of rack.Resilient bushing 16 is acetal resin bushing.
The noise-reduction method of steering gear test noise rack mechanism loading comprises the following steps：
A) oil pocket 3 in oil cylinder 2 can fill hydraulic oil by oil nozzle 9, then be sealed oil nozzle 9 by sealing plug, liquid
Pressure oil is entirely sealed in inside oil cylinder 2 by oil sealing 5, and since the material that oil sealing 5 uses is rubber, rack 1 is several in motion process
Noise will not be produced, oil pocket 3 is divided to for left and right two cavitys by piston 6, and the hydraulic oil in two cavitys 3 passes through on piston ring 7
Notch 8 swap；
Due to the limitation of different experiment condition or experimental site, the initial position of mechanism loading middle rack 1 can differ
Cause, so with the addition of a gear shaft 4 in the mechanism of the present invention.Gear shaft 4 and rack 1 are intermeshings, can pass through rotation
Gear shaft 4 comes the position of the axial movement of adjusting gear rack 1, fully meets the requirement of experiment condition or test site.Rack 1 is moving
During can the movement with piston 6, since hydraulic oil is only capable of from the notch 8 of piston ring 7 by the way that and 8 size of notch is smaller, oil
Liquid cannot be run through, this will produce larger oil resistance to hinder the movement of the namely rack 1 of piston 6, so as to play damping
Effect；The function of oil resistance is adjusted with regard to that can play by the size and number of notch 8 on regulating piston ring 7, so as to change damping
Size；Rack 1 can play the role of damping toward both direction movement, and traditional mechanism is due to the operation principle of throttle valve,
Damping action can be only produced in one direction；Larger liquid stream noise is often produced when fluid passes through throttle valve, with biography
Unlike the hydraulic damping mechanism loading of system, in mechanism, fluid need not be by throttle valve, but by piston ring 7
Notch 8.Teflon piston ring is soft piston ring, fluid by when can absorb a part of impact, avoid producing bright
Aobvious liquid stream noise；
B) the arc-shaped rack package wall of support base 12 is wrapped in rack 1 so that and rack 1 cannot be moved in radial direction, and
It can only be moved along the axis direction of support base 12；Set acetal resin package wall can reduce in 1 motion process of rack with branch
The grating that the friction of seat 12 produces is supportted, reduces noise；
Spring 14 is located in the groove of support base 12, and the spring force and rigidity of design are also all larger.Adjustment plug screw 13 and shell
Body 11 is thread fitting, rotates adjustment plug screw 13 to adjust the reduction length of spring 14,14 compression compression deformation of spring and generation one
The active force of a resistance compression, this active force can be applied to compressing rack 1 on support base 12 so that rack and pinion engagement is more
Step up close, reduce and the noise of generation is collided between tooth and tooth during rack and pinion engagement, while also rack 1 can be caused to move
During an extra frictional force is produced between fulcrum bearing, increase the damping of whole mechanism；Frictional force is equal to positive pressure
Power is multiplied by the friction coefficient of contact surface, and 14 decrement of spring is bigger, and the power of its resistance to deformation produced is also bigger, it is possible to
By adjusting the reduction length of spring 14 come the size of regulating friction force, this adjusts whole mechanism damping size and also plays weight
The effect wanted.
C) acetal resin resilient bushing is set, reduction rack 1 rubs produced with resilient bushing 16 during the motion
Noise；16 internal diameter of resilient bushing is smaller than 1 diameter of rack, and an enclasping force, enlarging mechanism damping are adds additional to rack 1
Effect.
The main portions of noise can be produced in whole mechanism following several places：1st, oil pocket hydraulic oil in left and right is swapping
When the liquid stream sound that is produced by notch of fluid；2nd, the impact sound during rack and pinion engagement；3rd, in rack motion process with lining
The grating that set friction produces；4th, the grating produced in rack motion process with fulcrum bearing friction.
And the present invention employs special construction or material for these positions for being also easy to produce noise, institute is so as to effectively drop
Level of noise during low use, so as to meet the requirement of low noise.It can in addition contain pass through the size for adjusting each parts, position
Put etc. to adjust the damping size that whole mechanism can produce, so as to meet the requirement of disparity items different loads.This is steering
Device carries out load-carrying noise experiment and provides very favorable experiment condition.
Mechanism can provide the load of different numerical value as other mechanisms, and can produce very little in use
Noise, fully meets requirement of the automobile steering device when carrying out the experiment of rack noise.
The present invention is exemplarily described above in conjunction with attached drawing, it is clear that the present invention implements and from aforesaid way
Limitation, as long as employing the various improvement of technical scheme progress, or not improved directly apply to other occasions
, within protection scope of the present invention.
Claims (1)
1. a kind of noise-reduction method of steering gear test noise rack mechanism loading, the low noise rack mechanism loading include
Oil cylinder, the rack being axially movable, the rack are set axially across oil cylinder, and one end of rack is adjusted equipped with rack elasticity
Mechanism, the other end of rack are equipped with position-limit mechanism, are oil pocket between the rack outer wall and oil cylinder inner wall, and the rack is stretched
The outer wall for going out oil cylinder one end is engaged with gear shaft, and the rack mechanism for regulating tightness is arranged on rack and pinion axis engaging piece
On the back of tooth of position, the oil pocket both ends are equipped with oil sealing, and the oil sealing is arranged between rack outer wall and oil cylinder inner wall, described
Oil sealing be rubber oil sea, the piston for being socketed in and oil pocket being divided into two cavitys on rack is equipped with the oil pocket, on piston
Equipped with piston ring, the piston ring outer rim is equipped with notch, and the piston ring is teflon piston ring, the oil cylinder
The oil nozzle of connection oil pocket is equipped with, one end of rack stretching oil cylinder is movable to pass through housing, the rack elasticity
Adjusting mechanism includes support base, adjustment plug screw, and described support base one end is equipped with rack package wall, the other end and tune of support base
Connected between whole plug screw by spring, the adjustment plug screw is threaded on housing, and the rack package wall is and tooth
The matched arcwall of bar outer wall shape, rack package wall are acetal resin package wall, and the end of the support base is equipped with
Groove, the end that blocks of adjustment plug screw form spring cavity with the groove, and the spring is arranged in spring cavity, the shell
Body is equipped with through hole, and the support base is arranged in through hole, the through-hole wall screw thread of the adjustment plug screw side wall and housing
Connection, the support base outer wall are equipped with annular groove, and annular ring is equipped with annular groove, and position-limit mechanism includes being socketed on rack
Resilient bushing, be socketed with stop collar outside the resilient bushing, the internal diameter of resilient bushing is less than rack diameter, the elasticity
Bushing is acetal resin bushing；
It is characterized in that：The method comprises the following steps：
A) in-oil cylinder oil pocket can fill hydraulic oil by oil nozzle, then be sealed oil nozzle by sealing plug, hydraulic oil passes through
Oil sealing is entirely sealed in inside oil cylinder, and since the material that oil sealing uses is rubber, rack is hardly produced in motion process and made an uproar
Oil pocket is divided into left and right two cavitys by sound, piston, and the hydraulic oil in two cavitys is swapped by the notch on piston ring；
Gear shaft and rack are intermeshings, and the position that can be moved axially by rotating gear shaft come adjusting gear rack, rack exists
In motion process can the movement with piston, since hydraulic oil is only capable of from the notch of piston ring by the way that and notch size is smaller, oil
Liquid cannot be run through, this will produce larger oil resistance to hinder the movement of piston i.e. rack, so as to play damping
Effect；The function of oil resistance is adjusted with regard to that can play by the size and number of notch on regulating piston ring, so as to change the big of damping
It is small；Rack can play the role of damping toward both direction movement；Teflon piston ring is soft piston ring, and fluid leads to
It is out-of-date to absorb part impact, avoid producing obvious liquid stream noise；
B) the arc-shaped rack package wall of support base is wrapped in rack so that rack cannot be moved in radial direction, and can only be along
The axis direction movement of support base；Acetal resin package wall is set to reduce the generation that rubs in rack motion process with support base
Grating, reduce noise；
Adjustment plug screw and housing are thread fittings, rotate adjustment plug screw to adjust the reduction length of spring, spring compression compression deformation
And the active force of a resistance compression is produced, this active force can be applied on support base and oppress rack so that rack-and-pinion is nibbled
That closes is even closer, the noise of generation is collided between tooth and tooth during reduction rack and pinion engagement, while can also cause rack
An extra frictional force is produced between fulcrum bearing during the motion, increases the damping of whole mechanism；
C) set acetal resin resilient bushing, reduce rack during the motion with resilient bushing friction caused by noise；
Resilient bushing internal diameter is smaller than rack diameter, and an enclasping force, enlarging mechanism damping action are adds additional to rack.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711393903.0A CN107909991A (en) | 2017-12-21 | 2017-12-21 | A kind of noise-reduction method of steering gear test noise rack mechanism loading |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711393903.0A CN107909991A (en) | 2017-12-21 | 2017-12-21 | A kind of noise-reduction method of steering gear test noise rack mechanism loading |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107909991A true CN107909991A (en) | 2018-04-13 |
Family
ID=61870531
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711393903.0A Pending CN107909991A (en) | 2017-12-21 | 2017-12-21 | A kind of noise-reduction method of steering gear test noise rack mechanism loading |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201141432Y (en) * | 2007-12-07 | 2008-10-29 | 荆州恒隆汽车零部件制造有限公司 | Rack supporting seat capable of reducing moving resistance |
| CN201545051U (en) * | 2009-09-25 | 2010-08-11 | 荆州恒隆汽车零部件制造有限公司 | Novel adjusting mechanism of rack supporting seat |
| CN201935814U (en) * | 2010-12-25 | 2011-08-17 | 荆州恒隆汽车零部件制造有限公司 | Noise testing device of hydraulic assistance steering gear |
| CN204184433U (en) * | 2014-10-14 | 2015-03-04 | 张坤地 | A kind of rack and pinion steering gear |
| CN105334047A (en) * | 2015-09-16 | 2016-02-17 | 浙江吉利汽车研究院有限公司 | Hydraulic steering system noise debugging device |
| JP2016142700A (en) * | 2015-02-05 | 2016-08-08 | トヨタ自動車株式会社 | Operating sound measuring device of power steering device |
| CN206710106U (en) * | 2017-05-09 | 2017-12-05 | 荆州恒隆汽车技术(检测)中心 | A kind of load device of steering gear noise measuring equipment |
-
2017
- 2017-12-21 CN CN201711393903.0A patent/CN107909991A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201141432Y (en) * | 2007-12-07 | 2008-10-29 | 荆州恒隆汽车零部件制造有限公司 | Rack supporting seat capable of reducing moving resistance |
| CN201545051U (en) * | 2009-09-25 | 2010-08-11 | 荆州恒隆汽车零部件制造有限公司 | Novel adjusting mechanism of rack supporting seat |
| CN201935814U (en) * | 2010-12-25 | 2011-08-17 | 荆州恒隆汽车零部件制造有限公司 | Noise testing device of hydraulic assistance steering gear |
| CN204184433U (en) * | 2014-10-14 | 2015-03-04 | 张坤地 | A kind of rack and pinion steering gear |
| JP2016142700A (en) * | 2015-02-05 | 2016-08-08 | トヨタ自動車株式会社 | Operating sound measuring device of power steering device |
| CN105334047A (en) * | 2015-09-16 | 2016-02-17 | 浙江吉利汽车研究院有限公司 | Hydraulic steering system noise debugging device |
| CN206710106U (en) * | 2017-05-09 | 2017-12-05 | 荆州恒隆汽车技术(检测)中心 | A kind of load device of steering gear noise measuring equipment |
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Application publication date: 20180413 |