CN207683593U - A kind of worm gear mechanism of electric boosting steering system - Google Patents
A kind of worm gear mechanism of electric boosting steering system Download PDFInfo
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- CN207683593U CN207683593U CN201820020712.3U CN201820020712U CN207683593U CN 207683593 U CN207683593 U CN 207683593U CN 201820020712 U CN201820020712 U CN 201820020712U CN 207683593 U CN207683593 U CN 207683593U
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Abstract
The utility model provides a kind of worm gear mechanism of electric boosting steering system, belongs to automobile technical field, it solves existing worm gear mechanism and vibrates in use greatly, has the problem of gap noise.The worm gear mechanism of this electric boosting steering system, electric boosting steering system includes shell, worm gear mechanism includes worm gear, worm screw, bearing assembly and spring assembly, the worm gear and worm screw are installed in shell with being meshed, one end of the worm screw is connect by bearing assembly with shell, the both ends of the spring assembly respectively with shell and bearing assembly against, the spring assembly include successively against spring base, spring one and spring two, the spring two is steel sheet spring, the spring base with respect to shell against and it is fixed, the end of the spring two and bearing assembly against and be bonded always.The utility model absorbs the vibrational energy of worm screw by concatenated steel sheet spring, inhibits snail vibration of bar and rings, and keeps worm and gear rotation more smooth.
Description
Technical field
The utility model belongs to automobile technical field, is related to a kind of electric boosting steering system, especially a kind of electronic to help
The worm gear mechanism of power steering.
Background technology
Worm and worm-wheel gearing is component important in electric boosting steering system, it, which carries, the power of motor
Effect ground, which is converted and passed to, turns to executing agency.Because there are manufacture, assembly public affairs in the building blocks such as bearing, worm gear, worm screw, shell
Difference, causing worm and gear, there are back lashes.Secondly, worm and gear, the bearing work under high rotating speed, high load condition for a long time
Make, also will produce wearing clearance, the problems such as abnormal sound, noise are big, rotation is uneven occurs so as to cause steering.Furthermore worm gear snail
Bar carries transmission from EPS motor large torque, high-revolving task, easy tos produce oscillation phenomenon.Therefore, exploitation is a kind of effectively
Evade the device of problem above, then seems particularly critical.
Currently, gap of worm compensation device is mainly made of cylindrically coiled spring, a bearing insert, worm gear snail
One end bearing of bar bottom end is mounted in bearing insert, and pre-pressure of the spring acts on bushing, reaches adjusting gap of worm
Requirement.Such as Chinese patent application (application number：201110117762.6) disclose a kind of gap of worm and compensate machine automatically
Structure, including steering gear housing, worm gear, worm screw, worm gear bottom bearing, spiral elasticity push rod component.The invention passes through elastic push rod
Apply pretightning force to worm screw bottom bearing, reaches the automatic compensation purpose of gap of worm.Although the technical solution is to worm gear
The gap of worm screw can play certain automatic compensating action, however cylindrically coiled spring can not completely eliminate EPS motor to worm gear
The large torque and high speed vibration that worm screw brings make to vibrate between mandril and bearing outside, and bearing and mandril are rigid
Property part, the two constantly collides and can make a noise and new vibration, influences the cooperation between worm and gear, makes worm and gear rotation not
Smooth-going has pause and transition in rhythm or melody sense and noise, influences user experience.
Invention content
The purpose of this utility model is the presence of the above problem in view of the prior art, it is proposed that a kind of electric power steering system
The worm gear mechanism of system, technical problem to be solved in the utility model are：How to inhibit snail vibration of bar and ring, makes snail
Worm and gear rotation is more smooth.
The purpose of this utility model can be realized by following technical proposal：
A kind of worm gear mechanism of electric boosting steering system, electric boosting steering system include shell, worm and gear
Mechanism includes worm gear, worm screw, bearing assembly and spring assembly, and the worm gear and worm screw are installed in shell with being meshed, described
One end of worm screw is connect by bearing assembly with shell, the both ends of the spring assembly respectively with shell and bearing assembly against,
It is characterized in that, the spring assembly include successively against spring base, spring one and spring two, the spring two be steel disc bullet
Spring, the spring base with respect to shell against and it is fixed, the end of the spring two and bearing assembly against and be bonded always.
Worm gear and worm screw are installed in shell, drive worm screw rotation that can drive worm gear by power output device such as motors
Rotation, worm screw is pressed to worm gear side by concatenated spring one and spring two, made by the one end of worm screw far from power output device
Worm and gear keeps the stabilization of transmission.In spring assembly, spring one mainly provides pressure to bearing assembly, and spring two can be
A small range elastic floating.Since power output device can pass to worm screw large torque and high-frequency vibration, steel sheet spring is now used
With bearing assembly against steel sheet spring is bonded bearing assembly always when worm screw being enable to drive bearing assembly vibration, avoids the two
Between rigid collision occur generate noise and new vibration, and be flexible contact between steel sheet spring and bearing assembly, can
It absorbs the energy of vibration and reduces the transmission of vibration, while steel sheet spring provides the pressure for pressing to worm gear side always, makes worm screw
Resistance increases when being moved to steel sheet spring side, can weaken the Oscillation Amplitude of worm screw, keep the cooperation of worm and wheel more stable,
Transmission is more smooth.
In the worm gear mechanism of above-mentioned electric boosting steering system, the spring two includes reed one, reed two, spring
Piece three and transition part pass through curved transition sections integrally connected between the reed one and reed two and reed two and reed three
And be distributed in three layers, the end of reed one and reed three turns down to form arc support and support with reed two to two side of reed
It leans on, gap is all had between reed one, reed three and reed two, the end face of the reed one has plane and supported with spring one
It leans on, the end face of the reed three is arc-shaped and reclines with bearing assembly.Spring two uses the structure of three layers of reed, leads between each reed
It crosses transition part and support portion forms support, there is larger elastic force, more vibrational energies can be absorbed, make entire worm and gear
Vibration smaller in system.The recessed portion of reed three coordinates with bearing support block, makes the cooperation of steel sheet spring and bearing support block
It is more stable, it is not susceptible to the contact area both slided relatively, and increased, makes the impact force that each point is subject on contact surface more
It is small, to make caused vibration and noise also smaller.
In the worm gear mechanism of above-mentioned electric boosting steering system, rubber sleeve is wrapped up on the spring two.In this way,
Each reed of spring two avoids that rigid collision occurs between reed when colliding in vibration processes, but by rubber sleeve it
Between collide, can preferably absorb vibrational energy, decaying vibration is floated, and noise is inhibited.
In the worm gear mechanism of above-mentioned electric boosting steering system, the spring one is rectangular coil spring, described
Spring base includes butting section, convex block one and convex block two, and the convex block one and convex block two are located at the both sides of butting section, described convex
Block one is used to be embedded in the groove of shell, and one end of the spring one is set on convex block two, the both sides of the butting section respectively with
Shell and spring one against.Spring base can be such that spring one is fixed with respect to shell, keep spring assembly more stable when in use.With circle
Cylindrical helical spring is compared, and the end face of rectangular coil spring is rectangular, and the contact area with bigger makes itself and spring two and bullet
The connection of spring abutment is more stable, and rectangular coil spring has the bearing capacity of bigger, is capable of providing higher pressure, absorbs more
More vibrational energies inhibits the effect of vibration also more preferable.
In the worm gear mechanism of above-mentioned electric boosting steering system, the bearing assembly include matched bearing and
Bearing support block, the bearing support block include support base half-turn one and support base half-turn two, the support base half-turn one and branch
The both ends of support seat half-turn two are respectively provided with the groove and boss to match, make one He of support base half-turn in the boss insertion groove
Support base half-turn two surround to be formed annular and boss can slide along the groove.In this way, support base half-turn one can be opposite along groove
Support base half-turn two slides, and so that worm screw is moved to eliminate the gap between worm and gear.
In the worm gear mechanism of above-mentioned electric boosting steering system, the support base half-turn one and support base half-turn two
It is that nylon material is made.The bearing support block of nylon material can absorb the vibration for being partially transferred to bearing, to reduce snail
Vibration of bar amplitude, noise is lower, coordinate between worm and gear it is more stable, transmission it is more smooth.
In the worm gear mechanism of above-mentioned electric boosting steering system, one end of the worm screw is arranged with the bearing of tubular
Keep set, the bearing that set is kept to stretch into bearing inner race and be interference fitted with bearing inner race, it is nylon that the bearing, which keeps set also,
Material is made.In this way, being nylon material since bearing keeps set, bearing holding set can buffer worm screw vibration and be rushed to bearing
It hits, makes the Oscillation Amplitude of worm screw and bearing all smallers.
Compared with prior art, the utility model has the following advantages：
1, the spring assembly of the utility model is connected using helical spring and steel sheet spring, and passes through steel sheet spring and bearing
It absorbs the energy of vibration when support base is against, the vibration at high speed for enabling worm screw to be passed over by power intake and weakens and shake
Dynamic amplitude and the transmission for reducing vibration, make snail vibration of bar smaller, and the cooperation of worm and wheel is more stable, and transmission is more smooth.
2, the spring two of the utility model has higher coefficient of elasticity using the structure of three layers of reed, can absorb big
Vibrational energy is measured, and rubber sleeve is wrapped up on spring two, the collision energy between reed is made to be absorbed by rubber sleeve, it can
Vibrational energy is greatly decreased, to make worm screw vibrate smaller.
3, set connection is kept by the bearing of nylon material between worm screw and bearing, worm screw is made to be transmitted to the vibrational energy of bearing
It is enough partially absorbed and decays, to reduce the transmission of vibration.
Description of the drawings
Fig. 1 is the structural schematic diagram of the utility model；
Fig. 2 is the enlarged drawing in the portions a in Fig. 1；
Fig. 3 is the structural schematic diagram of spring two；
Fig. 4 is the sectional view along line A-A in Fig. 3；
Fig. 5 is the front view of spring base；
Fig. 6 is the side view of spring base；
Fig. 7 is the front view of spring one；
Fig. 8 is the vertical view of spring one；
Fig. 9 is the front view of bearing support block；
Figure 10 is the side view of bearing support block.
In figure, 1, shell；11, bearing support block mounting groove；2, worm gear；3, worm screw；31, bearing keeps set；4, bearing branch
Support seat；41, support base half-turn one；42, support base half-turn two；5, bearing；61, spring base；611, butting section；612, convex block one；
613, convex block two；62, spring one；63, spring two；631, reed one；632, reed two；633, reed three；634, transition part；
635, support portion；636, rubber sleeve.
Specific implementation mode
It is specific embodiment of the utility model and in conjunction with attached drawing below, the technical solution of the utility model is made further
Description, but the utility model is not limited to these examples.
The worm gear mechanism of this electric boosting steering system is applied in automobile electric booster steering system, electric boosted
Steering includes shell 1, and worm gear mechanism includes worm gear 2, worm screw 3, bearing 5, bearing support block 4 and spring assembly, snail
Wheel 2 and worm screw 3 intermeshing ground be installed in shell 1, bearing 5 is installed on by bearing block on shell 1, one end of worm screw 3 and
EPS motor connects, and the other end connect with bearing 5, and the both ends of spring assembly are respectively with shell 1 and bearing support block 4 against making snail
Bar 3 and worm gear 2 against and there is the trend moved to 2 side of worm gear always, in this way, 2 worm screw 3 of worm gear can closely paste always
It closes.
Specifically, as shown in Figure 1, 2, with worm screw 3 far from being provided with bearing support block on the opposite shell 1 in EPS motor one end
Mounting groove 11, bearing support block 4 are installed in bearing support block mounting groove 11.One end that worm screw 3 connect with bearing 5 is arranged with cylinder
The bearing of shape keeps set 31, and bearing holding set 31 is made of nylon material and there is cyclic convex edge, bearing set 31 to be kept to stretch for end
Enter 5 inner ring of bearing with 5 inner ring of bearing interference fit and convex edge and 5 side wall of bearing are against in this way, worm screw 3 is transmitted by EPS motor
When the vibration at high speed to come over, set 31 can be kept to absorb portion of energy by bearing, to the Oscillation Amplitude for the worm screw 3 that decays.Such as
Fig. 9, shown in 10, bearing support block 4 is made of nylon material, including support base half-turn 1 and support base half-turn 2 42, support
The both ends of seat half-turn 1 and support base half-turn 2 42 are respectively provided with the groove and boss to match, and groove is embedded in by boss,
Support base half-turn 1 and support base half-turn 2 42 surround the annular to be formed and be used to support bearing 5, and support base half-turn 1 is embedded in
Close to 2 side of worm gear, support base half-turn 2 42 is located remotely from 2 side of worm gear and is supported with spring assembly bearing support block mounting groove 11
It leaning on, the boss after installation has certain gap with bottom portion of groove, and support base half-turn 2 42 is enable to be slided up and down along groove, from
And worm screw 3 is driven to swing to eliminate the gap between worm screw 3 and worm gear 2.
As shown in Fig. 2,5,6,7,8, spring assembly between shell 1 and support base half-turn 2 42, including successively against
Spring base 61, spring 1 and spring 2 63.Spring 1 can be that cylindrically coiled spring can also be rectangular coil spring
Spring, it is steel sheet spring that rectangular coil spring, spring 2 63 are used in the present embodiment.Spring base 61 includes butting section 611, convex block
One 612 and convex block 2 613, convex block 1 and convex block 2 613 are located at the both sides of butting section 611, and convex block 1 is embedded in shell
In the groove of body 1, one end of spring 1 is set on convex block 2 613, make butting section 611 respectively with shell 1 and spring 1
Against.As shown in Figure 3,4, spring 2 63 is formed successively the reed 1, reed of three layers of distribution up and down by elastic steel sheet through fold
2 632, reed 3 633, by 634 integrally connected of curved transition sections between reed 1, reed 2 632 and reed 3 633,
The end of reed 1 and reed 3 633 turns down to form arc support 635 to 2 632 side of reed, make reed 1,
Certain gap is all had between reed 3 633 and reed 2 632.Wherein, the end face of reed 1 be plane and with spring one
62 against the end face of reed 3 633 is recessed to 2 632 side of reed, enables reed 3 633 is perfect to be bonded support base half-turn two
42 outer surface.In addition rubber sleeve 636 is wrapped up by way of vulcanization on the steel disc of spring 2 63, spring 2 63 is made to be pressurized
When contracting, between reed and reed by rubber sleeve 636 against, not only reduce vibration again reduction noise.
When 2 worm screw 3 of worm gear is installed, by spring assembly and support base half-turn 2 42 against support base half-turn 2 42 and axis
Holding 5 tight abutments makes worm screw 3 recline without gap with worm gear 2, realizes stable transmission cooperation, while bearing 5 and support base
Certain gap is reserved between half-turn 1, it, can be in the pressure of spring assembly after worm screw 3 gap occurs with the abrasion of worm gear 2
Lower worm screw 3 can make up the gap to 2 one side oscillation of worm gear, and 2 worm screw 3 of worm gear is made to keep stable transmission cooperation.
The specific embodiments described herein are merely examples of the spirit of the present invention.The utility model institute
Belonging to those skilled in the art can make various modifications or additions to the described embodiments or using similar
Mode substitute, but without departing from the spirit of the present application or beyond the scope of the appended claims.
Although shell 1, bearing support block mounting groove 11, worm gear 2, worm screw 3, bearing, which is used more herein, keeps set
31, bearing support block 4, bearing 5, spring base 61, spring 1, spring 2 63, reed 1, reed 2 632, reed three
633, the terms such as transition part 634, support portion 635, rubber sleeve 636, but it does not preclude the possibility of using other terms.Use this
A little terms are used for the purpose of more easily describing and explaining the essence of the utility model；It is additional to be construed as any type
Limitation is all contrary to the spirit of the present invention.
Claims (7)
1. a kind of worm gear mechanism of electric boosting steering system, electric boosting steering system includes shell (1), worm and gear
Mechanism includes worm gear (2), worm screw (3), bearing assembly and spring assembly, and the worm gear (2) and worm screw (3) are installed on being meshed
In shell (1), one end of the worm screw (3) is connect by bearing assembly with shell (1), the both ends of the spring assembly respectively with
Shell (1) and bearing assembly against, which is characterized in that the spring assembly include successively against spring base (61), spring one
(62) and spring two (63), the spring two (63) is steel sheet spring, the spring base (61) with respect to shell (1) against and it is solid
It is fixed, the end of the spring two (63) and bearing assembly against and be bonded always.
2. the worm gear mechanism of electric boosting steering system according to claim 1, which is characterized in that the spring two
(63) include reed one (631), reed two (632), reed three (633) and transition part (634), the reed one (631) and spring
By curved transition sections (634) integrally connected and in three between piece two (632) and reed two (632) and reed three (633)
The end of layer distribution, reed one (631) and reed three (633) turns down to form arc support to reed two (632) side
(635) and with reed two (632) against, all have gap between reed one (631), reed three (633) and reed two (632),
The end face of the reed one (631) has plane and with spring one (62) against the end face of the reed three (633) is arc-shaped simultaneously
It reclines with bearing assembly.
3. the worm gear mechanism of electric boosting steering system according to claim 2, which is characterized in that the spring two
(63) rubber sleeve (636) is wrapped up on.
4. the worm gear mechanism of electric boosting steering system according to claim 1 or 2 or 3, which is characterized in that described
Spring one (62) is rectangular coil spring, and the spring base (61) includes butting section (611), convex block one (612) and convex block two
(613), the convex block one (612) and convex block two (613) are located at the both sides of butting section (611), and the convex block one (612) is used
In the groove of embedded shell (1), one end of the spring one (62) is set on convex block two (613), the butting section (611)
Both sides respectively with shell (1) and spring one (62) against.
5. the worm gear mechanism of electric boosting steering system according to claim 4, which is characterized in that the bearing group
Part includes matched bearing (5) and bearing support block (4), the bearing support block (4) include support base half-turn one (41) and
The both ends of support base half-turn two (42), the support base half-turn one (41) and support base half-turn two (42), which are respectively provided with, to match
Groove and boss, the boss, which is embedded in groove, makes support base half-turn one (41) and support base half-turn two (42) surround to form annular
And boss can slide along the groove.
6. the worm gear mechanism of electric boosting steering system according to claim 5, which is characterized in that the support base
Half-turn one (41) and support base half-turn two (42) are that nylon material is made.
7. the worm gear mechanism of electric boosting steering system according to claim 6, which is characterized in that the worm screw
(3) bearing that one end is arranged with tubular keeps set (31), the bearing that set (31) is kept to stretch into bearing (5) inner ring and and bearing
(5) inner ring is interference fitted, and the bearing keeps set (31) to be also made of nylon material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820020712.3U CN207683593U (en) | 2018-01-05 | 2018-01-05 | A kind of worm gear mechanism of electric boosting steering system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820020712.3U CN207683593U (en) | 2018-01-05 | 2018-01-05 | A kind of worm gear mechanism of electric boosting steering system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207683593U true CN207683593U (en) | 2018-08-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820020712.3U Active CN207683593U (en) | 2018-01-05 | 2018-01-05 | A kind of worm gear mechanism of electric boosting steering system |
Country Status (1)
| Country | Link |
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| CN (1) | CN207683593U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10815838B1 (en) | 2019-07-12 | 2020-10-27 | Hyundai Motor Company | Continuously variable valve duration apparatus and engine provided with the same |
| CN113671899A (en) * | 2021-08-12 | 2021-11-19 | 西安科技大学 | Piezoelectric actuation vibration suppression method for element action unit |
| WO2024041155A1 (en) * | 2022-08-26 | 2024-02-29 | 博世华域转向系统有限公司 | Worm compression and support mechanism for electric power steering system |
-
2018
- 2018-01-05 CN CN201820020712.3U patent/CN207683593U/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10815838B1 (en) | 2019-07-12 | 2020-10-27 | Hyundai Motor Company | Continuously variable valve duration apparatus and engine provided with the same |
| CN112211692A (en) * | 2019-07-12 | 2021-01-12 | 现代自动车株式会社 | Continuously variable valve duration device and engine provided with the same |
| EP3763919A1 (en) * | 2019-07-12 | 2021-01-13 | Hyundai Motor Company | Continuous variable valve opening duration apparatus and engine provided with the same |
| CN112211692B (en) * | 2019-07-12 | 2024-06-07 | 现代自动车株式会社 | Continuously variable valve duration device and engine provided with same |
| CN113671899A (en) * | 2021-08-12 | 2021-11-19 | 西安科技大学 | Piezoelectric actuation vibration suppression method for element action unit |
| WO2024041155A1 (en) * | 2022-08-26 | 2024-02-29 | 博世华域转向系统有限公司 | Worm compression and support mechanism for electric power steering system |
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