CN113847391A - Worm gear clearance adjusting mechanism for automobile steering system - Google Patents
Worm gear clearance adjusting mechanism for automobile steering system Download PDFInfo
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- CN113847391A CN113847391A CN202111082099.0A CN202111082099A CN113847391A CN 113847391 A CN113847391 A CN 113847391A CN 202111082099 A CN202111082099 A CN 202111082099A CN 113847391 A CN113847391 A CN 113847391A
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- Prior art keywords
- worm
- sliding block
- gear clearance
- steering system
- automobile steering
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- 230000007246 mechanism Effects 0.000 title claims abstract description 14
- 238000009434 installation Methods 0.000 claims abstract description 10
- 239000004809 Teflon Substances 0.000 claims description 4
- 229920006362 Teflon® Polymers 0.000 claims description 4
- 238000000576 coating method Methods 0.000 claims description 4
- 238000000034 method Methods 0.000 claims description 3
- 238000007789 sealing Methods 0.000 claims description 2
- 230000008859 change Effects 0.000 abstract description 7
- 230000001105 regulatory effect Effects 0.000 abstract description 3
- 230000005540 biological transmission Effects 0.000 description 3
- 230000002159 abnormal effect Effects 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H1/00—Toothed gearings for conveying rotary motion
- F16H1/02—Toothed gearings for conveying rotary motion without gears having orbital motion
- F16H1/04—Toothed gearings for conveying rotary motion without gears having orbital motion involving only two intermeshing members
- F16H1/12—Toothed gearings for conveying rotary motion without gears having orbital motion involving only two intermeshing members with non-parallel axes
- F16H1/16—Toothed gearings for conveying rotary motion without gears having orbital motion involving only two intermeshing members with non-parallel axes comprising worm and worm-wheel
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D3/00—Steering gears
- B62D3/02—Steering gears mechanical
- B62D3/04—Steering gears mechanical of worm type
- B62D3/06—Steering gears mechanical of worm type with screw and nut
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/02—Gearboxes; Mounting gearing therein
- F16H57/021—Shaft support structures, e.g. partition walls, bearing eyes, casing walls or covers with bearings
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/02—Gearboxes; Mounting gearing therein
- F16H57/023—Mounting or installation of gears or shafts in the gearboxes, e.g. methods or means for assembly
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/02—Gearboxes; Mounting gearing therein
- F16H57/029—Gearboxes; Mounting gearing therein characterised by means for sealing the gearboxes, e.g. to improve airtightness
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/12—Arrangements for adjusting or for taking-up backlash not provided for elsewhere
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/12—Arrangements for adjusting or for taking-up backlash not provided for elsewhere
- F16H2057/126—Self-adjusting during operation, e.g. by a spring
- F16H2057/127—Self-adjusting during operation, e.g. by a spring using springs
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Gear Transmission (AREA)
Abstract
A worm gear clearance adjustment mechanism for automobile steering system, including casing, worm wheel, worm right bearing, worm left end bearing, worm gear clearance automatically regulated subassembly. The automatic worm and gear clearance adjusting assembly comprises a sliding block, a sliding block sleeve, an elastic element and a nut. The shell is provided with an installation cavity for accommodating the automatic worm and gear clearance adjusting assembly. The main body of the sliding block sleeve is a cylindrical part with an opening at the lower part, the upper end of the sliding block is connected with the inner surface of the sliding block sleeve in a vertical sliding mode, and the spring is arranged between the upper end of the sliding block and the upper end of the sliding block sleeve. The worm right bearing is arranged in a right bearing installation part which is arranged at the lower end of the sliding block and moves left and right. The lower extreme of slider cover is equipped with the upper end that prevents the slider and escapes the anti-escape barb of slider cover. The invention can adjust the clearance of the worm gear according to the temperature change of the working environment of the worm gear, and has the advantages of simple and reasonable structure and high working reliability.
Description
Technical Field
The invention relates to a clearance adjusting mechanism, in particular to an automatic worm and gear clearance adjusting mechanism for an automobile steering system.
Background
With the requirements of the automobile industry on NVH and comfort, the requirements of customers on the NVH and the steering comfort of a steering system are higher and higher. The worm gear can lead to the worm gear to produce wearing and tearing after long-term meshing, and worm gear meshing clearance appears after the worm gear wearing and tearing, when steering wheel switching-over and vehicle process unsmooth road conditions, just can cause the worm gear meshing to strike the abnormal sound. The EPS such as DP-EPS/SP-EPS is arranged outside a cab and close to an engine, the working environment is very severe, the highest temperature reaches 120 ℃, the lowest temperature reaches-40 ℃, and the worm wheel is affected by the temperature to swell under the high-temperature condition, so that the worm wheel and the worm are meshed and stuck, the rotating hand feeling of a steering wheel is finally poor, and a driver feels uncomfortable. The worm wheel can appear the shrink phenomenon by low temperature under the low temperature condition to lead to the worm wheel worm meshing to appear the clearance, appear abnormal sound when finally leading to the steering wheel switching-over or when passing unsmooth road conditions, make the driver feel uncomfortable.
The invention patent document entitled "a gapless worm gear and worm rod reduction gear with enveloping ring surface", which is entitled as application No. 200810243792. X, No. CN 101482160B, discloses a gapless worm gear and worm rod reduction gear: "including base, worm and slewing bearing, the base includes axle housing and seat circle, and the axial lead of axle housing and the axial lead of seat circle are mutually perpendicular in spatial position, the worm device is in the axle housing of base, slewing bearing includes inner circle, outer ring gear and inlays the steel ball or the roller between inner circle and outer ring gear, and inner circle fixed connection is in one side of the seat circle of base, and outer ring gear gnaws with the worm and closes its characterized in that:
the worm comprises a mandrel, a left half worm, a right half worm, a spring and a shifting pin, the mandrel is arranged in the mandrel shell, the left half worm is axially provided with a step hole from left to right, the right half worm is also axially provided with a step hole from right to left, the left part of the step hole of the left half worm is a large-diameter hole, the right part of the step hole of the left half worm is a small-diameter hole, the right part of the step hole of the right half worm is a large-diameter hole, the left part of the step hole of the right half worm is a small-diameter hole, the left half worm and the right half worm are symmetrically sleeved on the mandrel through the step holes, the spring comprises two parts, the left part and the right part are respectively sleeved on the mandrel and are respectively embedded in the large-diameter holes of the left half worm and the right half worm, a left shaft shoulder is arranged on the mandrel at the left side of the left half worm, a right shaft shoulder is arranged on the mandrel at the right side of the right half worm, the left end surface of the left half worm is connected with the left shaft shoulder of the mandrel through the shifting pin, and the right end surface of the right half worm is connected with the right shaft shoulder of the mandrel by a shifting pin in a pin joint mode, and a gap is reserved between the right end surface of the left half worm and the left end surface of the right half worm rod. The aim of eliminating the tooth side clearance of the meshing of the worm and the gear is to divide a whole worm into a left half worm and a right half worm, the transmission relation between the left half worm and the worm gear is not harmonious, and the clearance problem is the meshing side clearance left by design and the problem that the transmission clearance is enlarged after abrasion, but the problem of solving the transmission performance change caused by the temperature change to the clearance change between the worm and the gear is not involved.
Disclosure of Invention
The invention mainly aims to provide a mechanism for automatically adjusting the clearance of a worm gear, which can automatically adapt to the temperature change of the working environment of the worm gear to adjust the clearance of the worm gear and avoid the discomfort of a driver.
The technical scheme adopted by the invention is as follows: a worm and gear clearance adjusting mechanism for an automobile steering system comprises a shell, a worm gear, a worm right bearing and a worm left end bearing;
the right bearing and the left bearing of the worm are both self-aligning ball bearings. The right end of the worm is a free end;
the automatic worm and gear clearance adjusting assembly comprises a sliding block, a sliding block sleeve, an elastic element and a nut; the right side of the corresponding shell is provided with an installation cavity for accommodating the automatic worm and gear clearance adjusting component, which is vertical to the axis of the worm wheel and communicated with the upper surface of the shell. The nut is in threaded connection with the cavity opening of the mounting cavity. The main body of the sliding block sleeve is a cylindrical part with an opening at the lower part, the upper end of the sliding block is connected with the inner surface of the sliding block sleeve in a vertical sliding mode, and the spring is arranged between the upper end of the sliding block and the upper end of the sliding block sleeve. The worm right bearing is arranged in a right bearing installation part which is arranged at the lower end of the sliding block and moves left and right. The lower extreme of slider cover is equipped with the upper end that prevents the slider and escapes the anti-escape barb of slider cover.
The spring is matched with a right worm bearing and a left worm end bearing of the self-aligning ball bearing, so that the clearance between the worm and the gear of the automobile steering system is in a minimum state. When the working temperature rises, the diameters of the worm and the worm wheel are increased, so that the right end of the worm is lifted, and the compression spring is compressed; when the working temperature is reduced, the diameters of the worm and the worm wheel are reduced, the spring is extended to push the right end of the worm to the worm wheel, so that the gap between the worm and the worm can be automatically adjusted along with the change of the temperature in the whole working process, a good automatic adjusting effect can be obtained as long as the elastic coefficient of the spring is determined, the abrasion of the worm and the worm is in a reasonable interval, and the overhaul and maintenance interval time of the worm and the worm is prolonged.
Preferably, an O-ring is provided on the lower end surface of the nut. The preferred scheme can effectively prevent dust.
Preferably, the elastic element is a coil spring, the lower end of the elastic element is located in a counter bore on the upper end of the slider, and the upper end of the elastic element abuts against the upper end of the slider sleeve. Further preferably, the rubber buffer ring is also included; the upper end of the sliding block is provided with a rubber buffer ring installation sinking groove, and the lower end of the rubber buffer ring is arranged in the rubber buffer ring installation sinking groove. According to the preferred scheme, the elastic element is low in cost and long in service life. Besides the spiral spring, a butterfly spring, elastic rubber and the like can be selected.
Preferably, the adjacent surfaces of both the slider sleeve and the slider are spray coated with a teflon coating. The Teflon coating has large temperature adaptation range, difficult corrosion and low working noise.
Preferably, the connecting surface of the right bearing mounting part and the worm right bearing is a section of major arc cylindrical surface which runs left and right. According to the preferred scheme, the connection reliability of the right bearing and the right bearing mounting part of the worm is high, and the mounting efficiency of the worm gear mounting device is improved.
In summary, the invention is a novel automatic adjusting mechanism for clearance between worm and gear, which can automatically adapt to the temperature change of the working environment of worm and gear to adjust the clearance between worm and gear and avoid the driver feeling uncomfortable, and has the advantages of simple and reasonable structure and high working reliability.
Drawings
FIG. 1: the invention has a structure schematic diagram;
FIG. 2: A-A is a schematic cross-sectional view;
FIG. 3: the connecting structure of the sliding block, the sliding block sleeve and the elastic element is schematically shown;
in the figure: the worm-gear type anti-escape device comprises a shell 1, a worm 2, a worm wheel 3, a worm right bearing 4, a worm left end bearing 5, a sliding block 6, a sliding block sleeve 7, an anti-escape barb 7.1, an elastic element 8, a nut 9, an O-shaped sealing ring 10 and a rubber buffer ring 11.
Detailed Description
The technical scheme of the invention is further specifically described by the following embodiments and the accompanying drawings. In the above, the upper, lower, left and right parts are distinguished with reference to FIG. 1.
As shown in fig. 1-3, the invention comprises a shell 1, a worm 2, a worm wheel 3, a worm right bearing 4 and a worm left end bearing 5. Wherein
The worm right bearing 4 and the worm left end bearing 5 are both self-aligning ball bearings. The right end of the worm 2 is a free end. Further:
still including worm gear clearance automatically regulated subassembly, worm gear clearance automatically regulated subassembly includes slider 6, slider cover 7, elastic element 8, nut 9. The right side of the corresponding shell 1 is provided with an installation cavity of the automatic worm and gear clearance adjusting component which is used for accommodating the automatic worm and gear clearance adjusting component, is vertical to the axis of the worm wheel 3 and is communicated with the upper surface of the shell 1; the nut 9 is in threaded connection with the cavity opening of the mounting cavity; the main body of the sliding block sleeve 7 is a cylindrical part with a lower opening, the upper end of the sliding block 6 is connected with the inner surface of the sliding block sleeve 7 in a vertical sliding mode, and the spring 8 is arranged between the upper end of the sliding block 6 and the upper end of the sliding block sleeve 7. The worm right bearing 4 is arranged in a right bearing mounting part which is arranged at the lower end of the sliding block 6 and moves left and right, and preferably, the connecting surface of the right bearing mounting part and the worm right bearing 4 comprises a section of major arc cylindrical surface which moves left and right. The lower end of the sliding block sleeve 7 is provided with an anti-escape barb 7.1 for preventing the upper end of the sliding block 6 from escaping from the sliding block sleeve 7. The adjacent surfaces of the sliding block sleeve 7 and the sliding block 6 are sprayed with Teflon coatings. In this embodiment, the elastic element 8 is a coil spring, the lower end of the elastic element 8 is located in a counter bore on the upper end of the slider 6, and the upper end of the elastic element 8 abuts on the upper end of the slider sleeve 7. Also comprises a rubber buffer ring 11; the upper end of the sliding block 6 is provided with a rubber buffer ring installation sinking groove, and the lower end of the rubber buffer ring 11 is arranged in the rubber buffer ring installation sinking groove.
Preferably, an O-ring 10 is provided on the lower end surface of the nut 9.
The above embodiments are merely preferred embodiments of the present invention, and not intended to limit the structure and scope of the invention. Indeed, many equivalent variations in the shapes, constructions and design objectives of the devices according to the present invention are possible. Therefore, all equivalent changes in the shapes, structures and design objectives of the present invention are intended to be covered by the present invention, and all such equivalent changes are intended to be protected by the present invention.
Claims (6)
1. A worm and gear clearance adjusting mechanism for an automobile steering system comprises a shell (1), a worm (2), a worm gear (3), a worm right bearing (4) and a worm left end bearing (5); the method is characterized in that:
the worm right bearing (4) and the worm left end bearing (5) are both self-aligning ball bearings; the right end part of the worm (2) is a free end;
the automatic worm and gear clearance adjusting device comprises a worm and gear clearance automatic adjusting assembly, wherein the worm and gear clearance automatic adjusting assembly comprises a sliding block (6), a sliding block sleeve (7), an elastic element (8) and a nut (9); the right side of the corresponding shell (1) is provided with an installation cavity of the worm and gear clearance automatic adjusting component which is used for accommodating the worm and gear clearance automatic adjusting component, is vertical to the axis of the worm wheel (3) and is communicated with the upper surface of the shell (1); the nut (9) is in threaded connection with the cavity opening of the mounting cavity; the main body of the sliding block sleeve (7) is a cylindrical part with an opening at the bottom, the upper end of the sliding block (6) is connected with the inner surface of the sliding block sleeve (7) in a vertical sliding mode, and the spring (8) is arranged between the upper end of the sliding block (6) and the upper end of the sliding block sleeve (7); the worm right bearing (4) is arranged in a right bearing mounting part which is arranged at the lower end of the sliding block (6) and moves left and right; the lower end of the sliding block sleeve (7) is provided with an escape-proof barb (7.1) for preventing the upper end of the sliding block (6) from escaping from the sliding block sleeve (7).
2. The worm gear clearance adjustment mechanism for an automobile steering system according to claim 1, characterized in that: an O-shaped sealing ring (10) is arranged on the lower end surface of the nut (9).
3. The worm gear clearance adjustment mechanism for an automobile steering system according to claim 1, characterized in that: the elastic element (8) is a spiral spring, the lower end of the elastic element (8) is positioned in a counter bore on the upper end of the sliding block (6), and the upper end of the elastic element (8) is propped against the upper end of the sliding block sleeve (7).
4. The worm gear clearance adjustment mechanism for an automobile steering system according to claim 3, characterized in that: also comprises a rubber buffer ring (11); the upper end of the sliding block (6) is provided with a rubber buffer ring mounting sinking groove, and the lower end of the rubber buffer ring (11) is arranged in the rubber buffer ring mounting sinking groove.
5. The worm gear clearance adjustment mechanism for an automobile steering system according to claim 1, characterized in that: the adjacent surfaces of the sliding block sleeve (7) and the sliding block (6) are sprayed with Teflon coatings.
6. The worm gear clearance adjustment mechanism for an automobile steering system according to claim 1, characterized in that: the connecting surface of the right bearing mounting part and the worm right bearing (4) is a section of major arc cylindrical surface which moves left and right.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111082099.0A CN113847391A (en) | 2021-09-15 | 2021-09-15 | Worm gear clearance adjusting mechanism for automobile steering system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111082099.0A CN113847391A (en) | 2021-09-15 | 2021-09-15 | Worm gear clearance adjusting mechanism for automobile steering system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113847391A true CN113847391A (en) | 2021-12-28 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111082099.0A Pending CN113847391A (en) | 2021-09-15 | 2021-09-15 | Worm gear clearance adjusting mechanism for automobile steering system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113847391A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114273920A (en) * | 2022-01-24 | 2022-04-05 | 湖南电气职业技术学院 | Assembling equipment for automobile worm gear and worm reducer |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013208933A (en) * | 2012-03-30 | 2013-10-10 | Showa Corp | Electric power steering device |
| CN203868247U (en) * | 2014-05-15 | 2014-10-08 | 比亚迪股份有限公司 | Worm and worm gear device and automobile |
| US20160201760A1 (en) * | 2015-01-12 | 2016-07-14 | Mando Corporation | Automobile reducer |
| CN209700780U (en) * | 2019-01-25 | 2019-11-29 | 新火炬科技有限公司 | A kind of vehicle electric power-assisted steering device automatic adjustment mechanism for gap of worm |
| CN210686940U (en) * | 2019-08-06 | 2020-06-05 | 浙江航驱汽车科技有限公司 | Steering gear worm and gear clearance compensation structure |
-
2021
- 2021-09-15 CN CN202111082099.0A patent/CN113847391A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013208933A (en) * | 2012-03-30 | 2013-10-10 | Showa Corp | Electric power steering device |
| CN203868247U (en) * | 2014-05-15 | 2014-10-08 | 比亚迪股份有限公司 | Worm and worm gear device and automobile |
| US20160201760A1 (en) * | 2015-01-12 | 2016-07-14 | Mando Corporation | Automobile reducer |
| CN209700780U (en) * | 2019-01-25 | 2019-11-29 | 新火炬科技有限公司 | A kind of vehicle electric power-assisted steering device automatic adjustment mechanism for gap of worm |
| CN210686940U (en) * | 2019-08-06 | 2020-06-05 | 浙江航驱汽车科技有限公司 | Steering gear worm and gear clearance compensation structure |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114273920A (en) * | 2022-01-24 | 2022-04-05 | 湖南电气职业技术学院 | Assembling equipment for automobile worm gear and worm reducer |
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Application publication date: 20211228 |