CN109322979B - Device for eliminating transmission clearance of worm and gear - Google Patents
Device for eliminating transmission clearance of worm and gear Download PDFInfo
- Publication number
- CN109322979B CN109322979B CN201811309960.0A CN201811309960A CN109322979B CN 109322979 B CN109322979 B CN 109322979B CN 201811309960 A CN201811309960 A CN 201811309960A CN 109322979 B CN109322979 B CN 109322979B
- Authority
- CN
- China
- Prior art keywords
- worm
- bevel gear
- boss
- floating
- shell
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- 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
- F16H55/00—Elements with teeth or friction surfaces for conveying motion; Worms, pulleys or sheaves for gearing mechanisms
- F16H55/02—Toothed members; Worms
- F16H55/22—Toothed members; Worms for transmissions with crossing shafts, especially worms, worm-gears
- F16H55/24—Special devices for taking up backlash
-
- 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
- F16H1/20—Toothed gearings for conveying rotary motion without gears having orbital motion involving more than two intermeshing members
- F16H1/203—Toothed gearings for conveying rotary motion without gears having orbital motion involving more than two intermeshing members with non-parallel axes
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Gear Transmission (AREA)
- Gears, Cams (AREA)
Abstract
The invention discloses a device for eliminating a transmission clearance of a worm gear. Wherein, the device includes: casing, front end housing, unsteady worm subassembly, bevel pinion, worm wheel, adjusting washer, spring, tegillum, wherein: the small bevel gear is used for transmitting the power of the motor to a bevel gear in the floating worm assembly; the bevel gear is connected with the worm through a flat key, and power is transmitted to the worm gear through the worm; the worm wheel is arranged in a bearing chamber of the shell and a bearing chamber of the front end cover which are positioned on the same axial line through bearings, and a circular hole is formed in the lower part of the shell and communicated with the cavity; the spring is arranged in the round hole of the small cover and is pressed against the floating worm assembly through the round hole, and the quantity of the gaskets is adjusted to ensure that the spring has certain pretightening force, so that the worm in the floating worm assembly is tightly attached to the tooth-shaped surface of the worm wheel. The embodiment of the invention can reduce and eliminate the return error of worm gear transmission, improve the output precision of the worm gear and meet the precision output requirement of the aviation rotary actuator.
Description
Technical Field
The invention relates to the technical field of worm gear and worm transmission, in particular to a device for eliminating a worm gear and worm transmission gap.
Background
With the rapid development of mechanical transmission technology, worm and gear transmission is widely used for power transmission at present. The worm gear has the advantage that the worm gear has a self-locking function.
However, the worm gear also has the following problems: the return error is large, the transmission precision is not high, and the device cannot be applied to precision transmission.
How to solve the problem of low transmission precision of the worm gear becomes a technical problem to be solved urgently in the field.
Disclosure of Invention
In view of the above, in order to solve at least one technical problem in the prior art, the present invention provides a device for eliminating a worm gear transmission gap. The device includes:
casing, front end housing, unsteady worm subassembly, bevel pinion, worm wheel, adjusting washer, spring, tegillum, wherein:
the shell and the front end cover are connected into a whole through screws to form a cavity;
the cavity is internally provided with: a floating worm assembly, a worm wheel and a small bevel gear;
the floating worm assembly is arranged in a hole in the shell and a hole in the front end cover through protruding cylindrical rings at two ends of the upper bracket;
the shell mounting hole and the hole for mounting the front end cover are coaxial;
the floating worm assembly can rotate around the center of the hole of the cylindrical ring;
the small bevel gear is arranged on the shell through a bearing and is used for transmitting the power of the motor to the bevel gear in the floating worm assembly;
the bevel gear is connected with the worm through a flat key and transmits power to the worm gear through the worm;
the worm wheel is arranged in a bearing chamber of the shell and a bearing chamber of the front end cover which are positioned on the same axial line through bearings, and a circular hole is formed in the lower part of the shell and communicated with the cavity;
the spring is arranged in a round hole of the small cover and is abutted against the floating worm assembly through the round hole, and the spring is ensured to have certain pretightening force by adjusting the quantity of the gaskets, so that the worm in the floating worm assembly is tightly attached to the tooth-shaped surface of the worm wheel.
The embodiment of the invention can reduce and eliminate the return error of worm gear transmission, improve the output precision of the worm gear and meet the precision output requirement of the aviation rotary actuator.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments of the present invention will be briefly described below, and it is obvious that the drawings described below are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a schematic structural diagram of an apparatus for eliminating a worm gear drive gap according to an embodiment of the present invention;
fig. 2 is a schematic structural view of a worm 2e according to an embodiment of the present invention;
FIG. 3 is a cross-sectional view of a stent 2fA-A, a schematic view from the left, according to one embodiment of the present invention;
figure 4 is a schematic illustration of a cross-sectional view of a floating worm assembly in accordance with an embodiment of the present invention.
Wherein: the device comprises a shell body-1, a front end cover-5, a floating worm assembly-2, a small bevel gear-3, a worm wheel-4, an adjusting washer-8, a spring-7 and a small cover-9.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Features and illustrative embodiments of various aspects of the invention are described in detail below. In the following detailed description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. It will be apparent, however, to one skilled in the art that the present invention may be practiced without some of these specific details. The following description of the embodiments is merely intended to provide a better understanding of the present invention by illustrating examples of the present invention. The present invention is in no way limited to any specific arrangement and method set forth below, but rather covers any improvements, substitutions and modifications in structure, method, and apparatus without departing from the spirit of the invention. In the drawings and the following description, well-known structures and techniques are not shown to avoid unnecessarily obscuring the present invention.
It should be noted that, in the case of conflict, the embodiments and features of the embodiments of the present invention may be combined with each other, and the respective embodiments may be mutually referred to and cited. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
Fig. 1 is a schematic structural diagram of a device for eliminating a worm gear transmission gap according to an embodiment of the present invention.
Referring to fig. 1, the scope of the claims is expanded by the following claims, and may, can, include, but is not limited to
The device for eliminating the transmission clearance of the worm gear comprises a shell 1, a front end cover 5, a floating worm assembly 2, a small bevel gear 3, a worm wheel 4, an adjusting washer 8, a spring 7, a small cover 9 and the like.
The shell 1 and the front end cover 5 are connected into a whole through screws, and a cavity for accommodating the floating worm assembly 2, the worm wheel 4, the small bevel gear 3 and the front end cover 5 is arranged in the shell. The floating worm assembly 2 is mounted in a hole in the housing 1 and in a hole in the front end cap 5 by means of a protruding cylindrical ring 2f2 at both ends of its upper bracket 2 f. The mounting hole of the shell 1 and the mounting hole of the front end cover 5 are coaxial, and the floating worm assembly 2 can rotate around the center of the mounting hole. The small bevel gear 3 is mounted on the housing 1 through a bearing, transmits the power of the motor to a bevel gear 2c in the floating worm assembly 2, the bevel gear 2c is connected with a worm 2e through a flat key 2d, and finally transmits the power to a worm wheel 4 through the worm 2 e. The worm wheel 4 is installed in the bearing chamber of the shell 1 and the bearing chamber of the front end cover 5 which are positioned on the same axial line through bearings, a circular hole is formed in the lower portion of the shell and communicated with the cavity, the spring 7 is installed in the circular hole of the small cover and then pushed against the floating worm assembly 2 through the circular hole, and a certain pre-tightening force is guaranteed to the spring through the quantity of the adjusting washers 8, so that the worm 2e in the floating worm assembly 2 is tightly attached to the tooth-shaped surface of the worm wheel 4, and the output return error of the worm wheel 4 is guaranteed. After being adjusted, the small cover 9 is locked by a screw.
When the product works, the power of the motor is transmitted to the bevel gear 2c in the floating worm component 2 through the small bevel gear 3, and the bevel gear 2c drives the worm to rotate so as to drive the turbine 4 to rotate. Because of the lower extreme of the worm subassembly 2 that floats is provided with spring 7 to spring 7 takes place to warp under the effect of adjusting washer 8, and then produces the pretightning force, and the profile of tooth face of worm and worm wheel is tightly laminated under the spring pretightning force effect, thereby has eliminated the flank clearance between the profile of tooth face of worm and worm wheel, has reached the effect that reduces the return stroke error.
Fig. 2 is a schematic structural view of a worm 2e according to an embodiment of the present invention.
As shown in fig. 2, the worm 2e is a stepped shaft, and a first boss 2e1 is sequentially arranged from left to right for mounting the left bearing 2b and the bevel gear 2c, a flat key groove 2e2 is formed on the boss 2e1, a flat key 2d is arranged in the flat key groove 2e2 for limiting the rotation of the bevel gear 2c, a second boss 2e3, the diameter of the second boss 2e3 is larger than that of the first boss 2e1 for limiting the axial movement of the bevel gear 2c, a third boss is a worm screw thread section 2e4, and a fourth boss 2e5 is used for mounting the bearing 2 g.
Fig. 3 is a cross-sectional view, left side view, of a stent 2fA-a according to an embodiment of the invention.
As shown in fig. 3, the view of the upper left corner in fig. 3 is a schematic diagram of a cross-sectional view of the right end rectangular parallelepiped boss 2f3 and the through hole 2f4, the view of the lower left corner in fig. 3 is a top view of the left end rectangular parallelepiped boss 2f1, the cylindrical ring 2f2 and the rectangular notch 2f5, and the view of the upper right corner in fig. 3 is a left view of the stent.
The support 2f is composed of three parts, the left end is a left end cuboid boss 2f1, a cylindrical ring 2f2 with the axis vertical to the axis of the left end cuboid boss 2f1 is arranged next to the left end, the axial dimension of the cylindrical ring 2f2 is larger than the width of the cuboid boss, the support 2f is used for being installed on the shell 1 and the front end cover 5 and is used for installing the bevel pinion 3 and the bevel gear 2c, the right end of the cylindrical ring 2f2 is provided with a right end cuboid boss 2f3 which has the same width as the left end cuboid boss 2f1 but has the axial dimension larger than the left end cuboid boss 2f1, and a through hole 2f4 is formed in the right end cuboid boss 2f3 and is used for installing the worm and the bearing. The upper part of the bracket is provided with a rectangular notch 2f5 which penetrates through the cylindrical ring 2f2 and a cuboid boss at the right end part, and the worm wheel 4 penetrates out of the notch 2f5 to be matched with the worm 2 e.
Figure 4 is a schematic illustration of a cross-sectional view of a floating worm assembly in accordance with an embodiment of the present invention.
The floating worm assembly shown in fig. 4 includes a bracket 2f, a left bearing cover 2a, a left bearing 2b, a bevel gear 2c, a flat key 2d, a worm adjustment washer 2h, a worm 2e, a right bearing 2g, a right bearing cover 2i, and the like. The assembly is of a floating structure, and the tooth-shaped surfaces of the worm and the worm wheel are tightly attached under the action of the pre-tightening force of the spring, so that the tooth-side gap between the tooth-shaped surfaces of the worm and the worm wheel is eliminated, and the effect of reducing return stroke errors is achieved.
In order to verify the output accuracy of the device for eliminating the worm gear transmission gap in each of the above embodiments, the following experiment was performed:
when the device is used for applying a 25N cm turning torque on the output rocker arm of the worm wheel shaft, the angular clearance of the output rocker arm is measured to be 5.3';
when the device is used for applying a turning torque of 26N cm on the output rocker arm of the worm wheel shaft, the angular clearance of the output rocker arm is measured to be 5.32';
when the device is used for applying a turning torque of 27N cm on the output rocker arm of the worm wheel shaft, the angular clearance of the output rocker arm is measured to be 5.33';
when the device is used for applying a turning torque of 28N cm on the output rocker arm of the worm wheel shaft, the angular clearance of the output rocker arm is measured to be 5.38';
when the device is used for applying a turning torque of 29 Ncm on the output rocker arm of the worm wheel shaft, the angular clearance of the output rocker arm is measured to be 5.4';
when a turning torque of 30 Ncm was applied to the worm gear shaft output rocker using this device, the output rocker angle lash was measured to be 5.5'.
Through a plurality of experiments, the device can obtain that when the device is used for applying the turning torque of 25-30N cm on the output rocker arm of the worm wheel shaft, the angle clearance of the output rocker arm is less than 6'.
Therefore, the structure for eliminating the transmission clearance of the worm gear can reduce and eliminate the return stroke error of the worm gear transmission, improve the output precision of the worm gear, and meet the precision output requirement of the aviation rotary actuator.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solutions of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive various equivalent modifications or substitutions within the technical scope of the present invention, and these modifications or substitutions should be covered within the scope of the present invention.
Claims (6)
1. An apparatus for eliminating a worm gear drive gap, comprising:
casing (1), front end housing (5), unsteady worm subassembly (2), little bevel gear (3), worm wheel (4), adjusting washer (8), spring (7), tegillum (9), wherein:
the shell (1) and the front end cover (5) are connected into a whole through screws to form a cavity;
the cavity is internally provided with: the floating worm assembly (2), a worm wheel (4) and a small bevel gear (3);
the floating worm assembly (2) is installed in a hole on the shell (1) and a hole of the front end cover (5) through protruding cylindrical rings (2f2) at two ends of the upper bracket (2 f);
the mounting hole of the shell (1) and the mounting hole of the front end cover (5) are coaxial;
the floating worm assembly (2) can rotate around the hole center of the cylindrical ring (2f 2);
the small bevel gear (3) is arranged on the shell (1) through a bearing and is used for transmitting the power of the motor to a bevel gear (2c) in the floating worm assembly (2);
the bevel gear (2c) is connected with the worm (2e) through a flat key (2d), and power is transmitted to the worm wheel (4) through the worm (2 e);
the worm wheel (4) is arranged in a bearing chamber of the shell (1) and a bearing chamber of the front end cover (5) which are positioned on the same axial line through bearings, and a circular hole is formed in the lower part of the shell (1) and communicated with the cavity;
the spring (7) is arranged in a round hole of the small cover (9), the round hole is abutted against the floating worm assembly (2), and the quantity of the gaskets (8) is adjusted to ensure that the spring has certain pretightening force, so that the worm (2e) in the floating worm assembly (2) is tightly attached to the tooth-shaped surface of the worm wheel (4).
2. The device according to claim 1, characterized in that said floating worm assembly (2) comprises:
the support (2f), the left bearing end cover (2a), the left bearing (2b), the bevel gear (2c), the flat key (2d), the worm adjusting washer (2h), the worm (2e), the right bearing (2g) and the right bearing end cover (2i) are connected in sequence.
3. The device according to claim 1, characterized in that said support (2f) comprises:
the left end is left end cuboid boss (2f1), be axis and left end cuboid boss (2f1) axis looks vertically cylindrical ring (2f2) immediately, the axial dimension of cylindrical ring (2f2) is greater than the width of cuboid boss, be used for installing support (2f) on casing (1) and front end housing (5), the inner chamber of cylindrical ring (2f2) is used for installing bevel pinion (3) and bevel gear (2c), the right-hand member of cylindrical ring (2f2) has one and left end cuboid boss (2f1) width is the same but the right-hand member cuboid boss (2f3) that axial dimension is greater than left end cuboid boss (2f1), there is a hole (2f4) that runs through in cuboid boss (2f3) and is used for installing worm (2e), left bearing (2b) and right bearing (2 g).
4. A device according to claim 3, characterised in that the upper part of the bracket (2f) has a rectangular slot (2f5) through the cylindrical ring (2f2) and the right rectangular boss (2f3), the worm wheel (4) passing through the rectangular slot (2f5) and engaging with the worm (2 e).
5. The device according to claim 3, characterized in that said worm screw (2e) comprises:
a first boss (2e1) for mounting the left bearing (2b) and the bevel gear (2c),
a flat key groove (2e2) is arranged on the first boss (2e1),
a flat key (2d) in the flat key groove (2e2) for restricting the rotation of the bevel gear (2c),
the diameter of the second boss (2e3) is larger than that of the first boss (2e1) for limiting the axial movement of the bevel gear (2 c);
the third boss is a worm thread section (2e 4);
and a fourth boss (2e5) for mounting the right bearing (2 g).
6. Device according to any one of claims 1-5, characterized in that the worm (2e) is a stepped shaft.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811309960.0A CN109322979B (en) | 2018-11-05 | 2018-11-05 | Device for eliminating transmission clearance of worm and gear |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811309960.0A CN109322979B (en) | 2018-11-05 | 2018-11-05 | Device for eliminating transmission clearance of worm and gear |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109322979A CN109322979A (en) | 2019-02-12 |
| CN109322979B true CN109322979B (en) | 2021-08-20 |
Family
ID=65260450
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811309960.0A Active CN109322979B (en) | 2018-11-05 | 2018-11-05 | Device for eliminating transmission clearance of worm and gear |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109322979B (en) |
Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2434478Y (en) * | 2000-07-16 | 2001-06-13 | 天津市海雄机电技术有限公司 | Conic gear-worm drive differential mechanism |
| CN2918883Y (en) * | 2006-02-22 | 2007-07-04 | 中国科学院长春光学精密机械与物理研究所 | Worm-gear drive set clearance regulating mechanism |
| CN101817016A (en) * | 2010-02-09 | 2010-09-01 | 唐山一重机械制造有限公司 | Reversible cold-rolling equipment and production method thereof |
| CN201731020U (en) * | 2009-02-04 | 2011-02-02 | 索尤若驱动有限及两合公司 | Worm gearing provided with clutch |
| CN202232177U (en) * | 2011-09-13 | 2012-05-30 | 周德义 | Worm and worm wheel transmission box for bearing corn harvester |
| CN202597591U (en) * | 2012-01-11 | 2012-12-12 | 北京星网宇达科技股份有限公司 | High-precision worm gear-worm transmission mechanism with reduced worm gear-worm transmission gaps |
| CN202646545U (en) * | 2012-07-04 | 2013-01-02 | 济南德高机器有限公司 | Gap-adjustable worm wheel and worm rod transmission mechanism |
| CN203395102U (en) * | 2013-07-04 | 2014-01-15 | 济南若泰数控科技有限公司 | Worm and gear transmission mechanism capable of automatically eliminating clearance |
| CN106838129A (en) * | 2017-04-18 | 2017-06-13 | 上海同驭汽车科技有限公司 | With worm and gear, brake and steering that centre-to-centre spacing regulation and gap eliminate |
| CN206770519U (en) * | 2017-04-18 | 2017-12-19 | 上海同驭汽车科技有限公司 | Worm and gear, brake and the steering eliminated with centre-to-centre spacing regulation and gap |
| CN207111910U (en) * | 2017-08-31 | 2018-03-16 | 长城汽车股份有限公司 | Backlash compensation structure, steering and the vehicle of Worm and worm-wheel gearing |
| CN207333664U (en) * | 2017-10-26 | 2018-05-08 | 西安星地测控技术有限公司 | Accurate Worm Wheel System automatic anti-backlash mechanism |
| WO2018124441A1 (en) * | 2016-12-29 | 2018-07-05 | 이래에이엠에스 주식회사 | Electric power steering system |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101853543B1 (en) * | 2016-05-19 | 2018-04-30 | 주식회사 만도 | Reducer for vehicle |
-
2018
- 2018-11-05 CN CN201811309960.0A patent/CN109322979B/en active Active
Patent Citations (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2434478Y (en) * | 2000-07-16 | 2001-06-13 | 天津市海雄机电技术有限公司 | Conic gear-worm drive differential mechanism |
| CN2918883Y (en) * | 2006-02-22 | 2007-07-04 | 中国科学院长春光学精密机械与物理研究所 | Worm-gear drive set clearance regulating mechanism |
| CN201731020U (en) * | 2009-02-04 | 2011-02-02 | 索尤若驱动有限及两合公司 | Worm gearing provided with clutch |
| CN101817016B (en) * | 2010-02-09 | 2013-03-27 | 唐山一重机械制造有限公司 | Reversible cold-rolling equipment and production method thereof |
| CN101817016A (en) * | 2010-02-09 | 2010-09-01 | 唐山一重机械制造有限公司 | Reversible cold-rolling equipment and production method thereof |
| CN202232177U (en) * | 2011-09-13 | 2012-05-30 | 周德义 | Worm and worm wheel transmission box for bearing corn harvester |
| CN202597591U (en) * | 2012-01-11 | 2012-12-12 | 北京星网宇达科技股份有限公司 | High-precision worm gear-worm transmission mechanism with reduced worm gear-worm transmission gaps |
| CN202646545U (en) * | 2012-07-04 | 2013-01-02 | 济南德高机器有限公司 | Gap-adjustable worm wheel and worm rod transmission mechanism |
| CN203395102U (en) * | 2013-07-04 | 2014-01-15 | 济南若泰数控科技有限公司 | Worm and gear transmission mechanism capable of automatically eliminating clearance |
| WO2018124441A1 (en) * | 2016-12-29 | 2018-07-05 | 이래에이엠에스 주식회사 | Electric power steering system |
| CN106838129A (en) * | 2017-04-18 | 2017-06-13 | 上海同驭汽车科技有限公司 | With worm and gear, brake and steering that centre-to-centre spacing regulation and gap eliminate |
| CN206770519U (en) * | 2017-04-18 | 2017-12-19 | 上海同驭汽车科技有限公司 | Worm and gear, brake and the steering eliminated with centre-to-centre spacing regulation and gap |
| CN207111910U (en) * | 2017-08-31 | 2018-03-16 | 长城汽车股份有限公司 | Backlash compensation structure, steering and the vehicle of Worm and worm-wheel gearing |
| CN207333664U (en) * | 2017-10-26 | 2018-05-08 | 西安星地测控技术有限公司 | Accurate Worm Wheel System automatic anti-backlash mechanism |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109322979A (en) | 2019-02-12 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US20140213409A1 (en) | Speed reducer | |
| CN106584353B (en) | Steering engine gear shaft axial compression device | |
| WO2015019420A1 (en) | Rotary actuator and strain wave gearing reduction drive unit | |
| CN104169159A (en) | Rack bar supporting device for steering gear | |
| CN207333664U (en) | Accurate Worm Wheel System automatic anti-backlash mechanism | |
| CN203784261U (en) | Worm and gear interval regulation mechanism and worm and gear mechanism | |
| CN109322979B (en) | Device for eliminating transmission clearance of worm and gear | |
| US8950278B2 (en) | Linear Step motor | |
| WO2019065422A1 (en) | Speed reducer-equipped motor | |
| JP2019207141A (en) | Rotational structure | |
| JP6216742B2 (en) | Geared motor | |
| KR20160025381A (en) | Motor and power transmission apparatus including the same | |
| WO2021024841A1 (en) | Vane pump | |
| JP2016156436A (en) | Speed reduction device | |
| CN207246332U (en) | Pedal motor | |
| CN103089971A (en) | Gap eliminating mechanism between worm and gear | |
| EP3628980B1 (en) | Rotary encoder and method for manufacturing a rotary encoder | |
| RU2377455C1 (en) | Wave drive | |
| JP2013199239A (en) | Rack shaft support device and vehicle steering device including the same | |
| KR102343583B1 (en) | Gear apparatus | |
| RU2624886C2 (en) | Electric drive | |
| KR101959720B1 (en) | Geared motor with magnetic encoder | |
| JP2010048352A (en) | Clutch mechanism, reduction gear with clutch, and motor with reduction gear | |
| JP5249444B1 (en) | Intake air amount control device for internal combustion engine | |
| CN113800227B (en) | Rotary executing device of fixed-force lock |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |