CN107139140B - Hand-held power tool with centering device - Google Patents
Hand-held power tool with centering device Download PDFInfo
- Publication number
- CN107139140B CN107139140B CN201710543741.8A CN201710543741A CN107139140B CN 107139140 B CN107139140 B CN 107139140B CN 201710543741 A CN201710543741 A CN 201710543741A CN 107139140 B CN107139140 B CN 107139140B
- Authority
- CN
- China
- Prior art keywords
- planet carrier
- centering
- hand
- power tool
- held power
- 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
- 230000004323 axial length Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25F—COMBINATION OR MULTI-PURPOSE TOOLS NOT OTHERWISE PROVIDED FOR; DETAILS OR COMPONENTS OF PORTABLE POWER-DRIVEN TOOLS NOT PARTICULARLY RELATED TO THE OPERATIONS PERFORMED AND NOT OTHERWISE PROVIDED FOR
- B25F5/00—Details or components of portable power-driven tools not particularly related to the operations performed and not otherwise provided for
- B25F5/001—Gearings, speed selectors, clutches or the like specially adapted for rotary tools
-
- 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
- F16H57/08—General details of gearing of gearings with members having orbital motion
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Retarders (AREA)
- Drilling And Boring (AREA)
Abstract
The invention relates to a hand-held power tool having a centering device, wherein a section of a spindle of the hand-held power tool facing away from a tool head is provided with a driven part which is connected to the spindle in a rotationally fixed manner, wherein the spindle is supported on a housing of the hand-held power tool by means of the driven part, a clamping body and a stop ring having a through-center cylindrical surface, wherein an unlocking part on a planet carrier cooperates with a clamping surface of the clamping body spaced apart from the outer circumference of the driven part, wherein a cylindrical, convex centering element is provided on an end face of the driven part facing the planet carrier, wherein the planet carrier is provided on the end face facing away from the spindle with a centering hole which cooperates with the centering element, wherein the centering hole is coaxial with a central opening in which the driving part and the unlocking part are located, and is coaxial with the centering element. The invention can greatly improve concentricity and effectively reduce noise when the hand-held machine tool is in use.
Description
Technical Field
The invention relates to the field of electric tools, in particular to a hand-held machine tool with a centering device.
Background
DE69921250T2, which is currently known, discloses a machine tool with an electric motor, in which a spindle lock drive is accommodated in a cylindrical chamber which is fixed relative to a housing and which comprises a drive-side intermediate shaft, and which comprises a prismatic driven part. Longitudinal grooves are provided on the edges of the prisms, into which the axially directed finger-shaped drivers engage with play in the circumferential direction. The driver is formed on the intermediate shaft gear, and clamping rollers are arranged between the prismatic surface and the cylindrical cavity or an inner wall of a sleeve arranged in the cavity and fixed relative to the housing. In normal operation, the torque of the electric motor is transmitted via the pinion to the countershaft gear and from there via the driver to the driven part, which is fixedly engaged on the countershaft. The intermediate shaft pinion is driven by the intermediate shaft, which meshes with the driven gear and thus drives the main shaft. When the torque transmitted by the driven gear to the intermediate shaft is greater than the torque transmitted by the intermediate shaft gear, the driven member rotates relative to the driver within a predetermined gap, and the clamping rollers exert a clamping action between the driven member and a cylindrical cavity fixed relative to the housing, such that the torque generated by the spindle is supported on the housing and blocks the spindle.
Another patent CN102271869B discloses a shaft lock structure in which the clamping body of the clamping roller stroke and the stop ring surrounding the clamping roller are directly engaged on the section facing the main shaft, and there is a guide on the planet carrier that projects axially beyond the end face of the planet carrier facing the main shaft in the circumferential direction between the driving members, which guide cooperates with the rounded edges of the prismatic driving profile. The edge of the driven part with the prismatic driving contour is rounded off and runs over a cylindrical part-surface. The outer contour surface of the driven part consists of an arc surface and a plane, the processing of the main shaft is troublesome, and in addition, the coaxial precision of the planet carrier and the main shaft is required to be improved.
Disclosure of Invention
The invention relates to a hand-held power tool having a centering device, comprising a rotatable spindle and a planet carrier, wherein the planet carrier comprises a driver for transmitting torque to a driven part which is connected to the spindle in a rotationally fixed manner at a defined play in the direction of rotation, and wherein the spindle is supported on a housing of the hand-held power tool by the driven part, a clamping body and a stop ring having a cylindrical surface; the planet carrier comprises an unlocking part which axially protrudes out of the planet carrier and faces the end face of the main shaft, and the unlocking part is matched with the clamping body and a clamping surface positioned on the outer circumference of the driven part; the driving pieces are circumferentially distributed on a central opening of a disc-shaped planet carrier, and the central opening is coaxial with the planet carrier; the driven part is provided with a cylindrical convex centering piece on the end face facing the planet carrier, the planet carrier is provided with a centering hole which is away from the end face of the main shaft and is matched with the centering piece, and the centering hole is coaxial with a central hole where the driving piece is located and is coaxial with the centering piece.
According to a further embodiment of the invention, the diameter of the centering hole is smaller than the diameter of the central opening.
According to a further embodiment of the invention, the axial length of the centering piece is substantially the same as the axial depth of the centering hole.
According to a further embodiment of the invention, a hand-held power tool with a centering device comprises a rotatable spindle, a planet carrier and a second layer of sun gears, the planet carrier comprising a driver for transmitting torque in a defined gap in the direction of rotation to a driven part which is connected to the spindle in a rotationally fixed manner, the spindle being supported on a housing of the hand-held power tool by the driven part, a clamping body and a stop ring having a cylindrical surface; the planet carrier comprises an unlocking part which axially protrudes out of the planet carrier and faces the end face of the main shaft, and the unlocking part is matched with the clamping body and a clamping surface positioned on the outer circumference of the driven part; the driving pieces are circumferentially distributed on a central opening of a disc-shaped planet carrier, and the central opening is coaxial with the planet carrier; the second layer sun gear is arranged on the reverse side of the planet carrier opposite to the end face where the unlocking part is located, a cylindrical convex centering piece is arranged on the end face of the driven part facing the planet carrier, a centering hole which is matched with the centering piece is formed in the end face, close to the main shaft, of the second layer sun gear, and the centering hole is coaxial with the second layer sun gear and coaxial with the centering piece.
According to a further embodiment of the invention, the second layer sun gear is provided with a boss on one side end face close to the main shaft, and the centering hole is provided on the boss.
According to a further embodiment of the invention, the driver and the unlocking part are axially spaced apart on a central opening of a disc-shaped planet carrier.
According to a further embodiment of the invention, the driver is circumferentially distributed over a central opening of the disc-shaped planet carrier, the unlocking portion being radially at a distance from the driver.
According to a further embodiment of the invention, the axial cross-section of the driven member is an equilateral hexagon.
According to a further embodiment of the invention, the unlocking part is preferably at a distance in the radial direction from the clamping surface on the driven part.
According to the embodiment of the invention, the concentricity can be greatly improved, the centering holes are arranged to be centered with the main shaft, the coaxiality of the main shaft and the centering holes is ensured, and meanwhile, the gear assembly arranged on the planet carrier is centered on the center of the planet carrier, namely the center of the centering holes, so that the coaxiality of the gear assembly and the main shaft is also ensured, and the noise in use is effectively reduced on the premise of greatly improving the coaxiality.
Drawings
The invention is further described below with reference to the accompanying drawings.
Fig. 1 is a partial exploded view of one embodiment of the present invention.
Fig. 2 is a perspective view of a planet carrier according to an embodiment of the present invention.
Fig. 3 is a cross-sectional view of a spindle portion of a hand-held power tool according to one embodiment of the present invention.
Fig. 4 is a partial exploded view of another embodiment of the present invention.
Fig. 5 is a perspective view of a planet carrier according to another embodiment of the present invention.
Fig. 6 is a cross-sectional view of a spindle portion of a hand-held power tool according to another embodiment of the present invention.
Fig. 7 is a schematic view of the shaft lock of the present invention in an unlocked state.
Fig. 8 is a schematic view of the shaft lock of the present invention in a locked state.
Detailed Description
A hand-held power tool with a centering device according to the present embodiment, as shown in the exploded view of the spindle shaft lock shown in fig. 1, comprises a rotatable spindle 1 and a planet carrier 9. The spindle 1 is provided at its end remote from the tool head with a driven member 5 which is non-rotatable relative to the spindle 1, preferably of equilateral hexagonal axial cross-section, and which is formed by a plurality of clamping surfaces in the circumferential direction. The end surface of the driven member facing the planet carrier 9 is provided with a centering element 6 protruding from the driven member 5 in a cylindrical shape, and the centering element 6 may be fixedly and relatively-rotatably mounted on the end surface of the driven member 5 or fixedly and relatively-rotatably mounted on the end surface of the driven member 5. The spindle 1 is supported on the housing of the hand-held power tool by a driven part 5 and a clamping surface 4 thereon, a clamping body 2 and a stop ring 7 having a cylindrical surface of a through-center.
As shown in fig. 2 and 3, the planet carrier 9 comprises a driver 11 and an unlocking part 8, wherein the driver 11 transmits torque with a defined play in the rotational direction to a driven part 5 which is connected to the spindle 1 in a rotationally fixed manner, and the unlocking part 8 protrudes axially beyond the end face of the planet carrier facing the spindle. The present embodiment preferably provides that the driver 11 and the unlocking part 8 are circumferentially spaced apart on a central opening of the disc-shaped planet carrier 9, which central opening is coaxial with the planet carrier 9. The shape of the central opening is substantially the same as the shape of the driven part 5, wherein three sides of the hexagon are provided as the driver 11 and the other three faces extend outwardly to the outer end face of the unlocking portion 8. The planet carrier may also be provided with a driver 11 and unlocking parts 8 distributed circumferentially over a central opening of the disc-shaped planet carrier 9, which central opening is coaxial with the planet carrier 9, as shown in fig. 5. The shape of the central opening is substantially the same as the shape of the driven member 5, wherein six sides of the hexagon are each provided as a driver 11, and the unlocking portion 8 is provided at a distance from the driver 11 in the radial direction.
The planet carrier 9 transmits torque via the driver 11 to the driven part 5, which is connected to the spindle 1 in a rotationally fixed manner, through a defined play in the rotational direction. The unlocking part 8 axially protrudes out of the end face of the planet carrier 9 facing the main shaft 1, when the unlocking part 8 is assembled with the driven part, the unlocking part 8 is matched with the clamping surface 3, and the unlocking part 8 is preferably arranged to have a certain distance from the clamping surface 3 in the radial direction, so that torque is not transmitted when the unlocking part 8 is not matched with the clamping surface 3, no stress is generated on the unlocking part 8, and the unlocking part 8 is not easy to damage. In the above preferred arrangement of the unlocking part and the driver, the unlocking part 8 is correspondingly engaged with a plurality of clamping surfaces of the clamping body 2 spaced apart from the outer circumference of the driven part.
On the end face of the planet carrier 9 facing away from the main shaft, a centring hole 10 is provided which cooperates with the centring member 6, the centring hole 10 being coaxial with the central opening and having a diameter smaller than the diameter of the central opening, the centring member 6 having an axial length substantially equal to the axial depth of the centring hole 10.
The clamping surfaces are inserted into the central opening of the planet carrier 9 and are supported on the respective driver 11 of the planet carrier 9 with a defined play which allows a defined rotational movement of the planet carrier 9 with the portability of the spindle 1. The clamping surfaces 4 of the driven part 5 are provided with clamping bodies formed by clamping rollers 2, which in the assembled state are surrounded by a stop ring 7 having a central cylindrical surface.
In normal operation, as shown by the arrows in fig. 7, torque is transmitted from the planet carrier 9 through the driver 11 to the clamping surface 4 of the driven member. As shown in fig. 8, in a special case, as indicated by the arrow in the figure, the torque transmitted from the spindle 1 to the planet carrier 9 exceeds the driving torque, and the clamping surface establishes a clamping connection between the clamping surface of the spindle and the hollow cylindrical surface of the stop ring by means of the clamping body, so that the torque applied by the spindle is supported on the housing of the driving device and the spindle is locked.
In one embodiment of the invention, the centering hole and the main shaft are arranged on the planet carrier to ensure the coaxiality of the main shaft and the centering hole, and meanwhile, the gear component arranged on the planet carrier also takes the center of the planet carrier, namely the center of the centering hole, as the center, so that the coaxiality of the gear component and the main shaft is also ensured, and the noise in use is effectively reduced on the premise of greatly improving the coaxiality.
In a further embodiment of the invention, as shown in fig. 4, a hand-held power tool with a centering device comprises a rotatable spindle 1 and a planet carrier 9. The spindle 1 is provided at its end remote from the tool head with a driven member 5 which is non-rotatable relative to the spindle 1, preferably of equilateral hexagonal axial cross-section, and which is formed by a plurality of clamping surfaces in the circumferential direction. The end surface of the driven member facing the planet carrier 9 is provided with a centering element 6 protruding from the driven member 5 in a cylindrical shape, and the centering element 6 may be fixedly and relatively-rotatably mounted on the end surface of the driven member 5 or fixedly and relatively-rotatably mounted on the end surface of the driven member 5. The spindle 1 is supported on the housing of the hand-held power tool by a driven part 5 and a clamping surface 4 thereon, a clamping body 2 and a stop ring 7 having a cylindrical surface of a through-center.
As shown in fig. 2 and 6, the planet carrier 9 comprises a driver 11 and an unlocking part 8, wherein the driver 11 transmits torque with a defined play in the rotational direction to a driven part 5 which is connected to the spindle 1 in a rotationally fixed manner, and the unlocking part 8 protrudes axially beyond the end face of the planet carrier facing the spindle. The present embodiment preferably provides that the driver 11 and the unlocking part 8 are circumferentially spaced apart on a central opening of the disc-shaped planet carrier 9, which central opening is coaxial with the planet carrier 9. The shape of the central opening is substantially the same as the shape of the driven part 5, wherein three sides of the hexagon are provided as the driver 11 and the other three faces extend outwardly to the outer end face of the unlocking portion 8. The planet carrier may also be provided with a driver 11 and unlocking parts 8 distributed circumferentially over a central opening of the disc-shaped planet carrier 9, which central opening is coaxial with the planet carrier 9, as shown in fig. 5. The shape of the central opening is substantially the same as the shape of the driven member 5, wherein six sides of the hexagon are each provided as a driver 11, and the unlocking portion 8 is provided at a distance from the driver 11 in the radial direction.
A second layer of sun gears 13 is mounted on the carrier 9 on the opposite side to the end face on which the unlocking portion is located, which second layer of sun gears 13 is provided with a centring hole 14 on the end face on the side close to the spindle 1, which centring hole 14 cooperates with the centring member 6, wherein the centring hole 14 is coaxial with the second layer of sun gears 13 and with the centring member. In this embodiment, a boss is preferably provided on an end face of the second layer sun gear on one side close to the main shaft, and a centering hole 14 is provided on the boss.
When assembled together, the stop ring 7 is mounted on the outside of the clamping face and the clamping body, and the planet carrier 9 is fitted over the driven member, the planet carrier and stop ring being arranged axially along the main shaft, as shown in figure 6. The centering piece 6 passes through the stop ring 7 and the planet carrier 9 and is matched with a centering hole 14 on the second layer sun gear 13 to realize centering and positioning.
In another embodiment of the invention, the centering hole and the main shaft are arranged on the second layer of sun gear to center, so that the coaxiality of the main shaft and the centering hole is ensured, and meanwhile, the coaxiality of the gear assembly and the main shaft is ensured, and on the premise of greatly improving the coaxiality, the noise in use is effectively reduced.
In the two embodiments, the clamping surfaces are symmetrically designed on the same plane, and the processing can be performed by adopting a polygonal turning process, so that the processing efficiency and the processing precision are greatly improved.
The embodiments disclosed are not particularly limited to the embodiments shown herein. Any modification, equivalent replacement, improvement, etc. of the present invention should fall within the protection scope of the present invention.
Claims (6)
1. A hand-held power tool with a centering device, comprising a rotatable spindle, a planet carrier and a second layer of sun gears, the planet carrier comprising a driver for transmitting torque to a driven part, which is connected to the spindle in a rotationally fixed manner, by a defined play in the direction of rotation, the spindle being supported on a housing of the hand-held power tool by the driven part, a clamping body and a stop ring having a cylindrical surface; the planet carrier comprises an unlocking part which axially protrudes out of the planet carrier and faces the end face of the main shaft, and the unlocking part is matched with the clamping body and a clamping surface positioned on the outer circumference of the driven part; the driving pieces are circumferentially distributed on a central opening of a disc-shaped planet carrier, and the central opening is coaxial with the planet carrier; the second layer sun gear is arranged on the reverse side of the planet carrier opposite to the end face where the unlocking part is located, and is characterized in that:
the driven part is provided with a cylindrical convex centering piece on the end face facing the planet carrier, the end face of one side of the second layer of sun gear, which is close to the main shaft, is provided with a centering hole which is matched with the centering piece, and the centering hole is coaxial with the second layer of sun gear and is coaxial with the centering piece.
2. A hand-held power tool with centering device according to claim 1, characterized in that: the second layer sun gear is provided with a boss on one side end face close to the main shaft, and the centering hole is arranged on the boss.
3. A hand-held power tool with centering device according to any one of claims 1-2, characterized in that: the driver and the unlocking part are axially and alternately distributed on a central opening of the disc-shaped planet carrier.
4. A hand-held power tool with centering device according to any one of claims 1-2, characterized in that: the driving piece is circumferentially distributed on a central opening of the disc-shaped planet carrier, and the unlocking part is radially separated from the driving piece by a certain distance.
5. A hand-held power tool with centering device according to any one of claims 1-2, characterized in that:
the axial section of the driven part is of an equilateral hexagon.
6. A hand-held power tool with centering device according to any one of claims 1-2, characterized in that: the unlocking portion is radially spaced from a clamping surface on the driven member.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710543741.8A CN107139140B (en) | 2017-07-05 | 2017-07-05 | Hand-held power tool with centering device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710543741.8A CN107139140B (en) | 2017-07-05 | 2017-07-05 | Hand-held power tool with centering device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107139140A CN107139140A (en) | 2017-09-08 |
| CN107139140B true CN107139140B (en) | 2024-03-19 |
Family
ID=59785256
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710543741.8A Active CN107139140B (en) | 2017-07-05 | 2017-07-05 | Hand-held power tool with centering device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107139140B (en) |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1437522A (en) * | 2000-04-18 | 2003-08-20 | 布莱克-德克尔公司 | Power driven rotary device |
| US6715562B1 (en) * | 2003-05-08 | 2004-04-06 | Power Network Industry, Co., Ltd. | Output shaft locking device |
| CN1717301A (en) * | 2002-12-19 | 2006-01-04 | 罗伯特·博世有限公司 | Transmission device, especially for the transmission device of electronic hand held machine tool |
| US7048107B1 (en) * | 1997-08-26 | 2006-05-23 | Atlas Copco Electric Tools Gmbh | Driving device |
| JP2011230208A (en) * | 2010-04-26 | 2011-11-17 | Makita Corp | Bit installing unit of screw-fastening tool |
| CN102271869A (en) * | 2009-01-08 | 2011-12-07 | 罗伯特·博世有限公司 | Machine tool having a spindle driven by a drive apparatus |
| CN103770091A (en) * | 2012-10-25 | 2014-05-07 | 罗伯特·博世有限公司 | Hand-held power tool device |
| CN105252496A (en) * | 2008-10-14 | 2016-01-20 | 罗伯特·博世有限公司 | Hand-held machine tool having automatic shaft locking |
| CN106015543A (en) * | 2016-07-19 | 2016-10-12 | 青岛联源通机械有限公司 | Welding spattering-preventing method for split planet carrier |
| CN106914847A (en) * | 2015-12-28 | 2017-07-04 | 南京德朔实业有限公司 | Torque output tool |
| CN206913086U (en) * | 2017-07-05 | 2018-01-23 | 浙江格致工具有限公司 | A kind of hand held power machine with centralising device |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102947055B (en) * | 2010-03-08 | 2014-10-22 | 创科电动工具科技有限公司 | Power tool having a spindle lock |
| CN104070490B (en) * | 2013-03-29 | 2016-11-23 | 南京德朔实业有限公司 | Electric tool |
-
2017
- 2017-07-05 CN CN201710543741.8A patent/CN107139140B/en active Active
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7048107B1 (en) * | 1997-08-26 | 2006-05-23 | Atlas Copco Electric Tools Gmbh | Driving device |
| CN1437522A (en) * | 2000-04-18 | 2003-08-20 | 布莱克-德克尔公司 | Power driven rotary device |
| CN1717301A (en) * | 2002-12-19 | 2006-01-04 | 罗伯特·博世有限公司 | Transmission device, especially for the transmission device of electronic hand held machine tool |
| US6715562B1 (en) * | 2003-05-08 | 2004-04-06 | Power Network Industry, Co., Ltd. | Output shaft locking device |
| CN105252496A (en) * | 2008-10-14 | 2016-01-20 | 罗伯特·博世有限公司 | Hand-held machine tool having automatic shaft locking |
| CN102271869A (en) * | 2009-01-08 | 2011-12-07 | 罗伯特·博世有限公司 | Machine tool having a spindle driven by a drive apparatus |
| JP2011230208A (en) * | 2010-04-26 | 2011-11-17 | Makita Corp | Bit installing unit of screw-fastening tool |
| CN103770091A (en) * | 2012-10-25 | 2014-05-07 | 罗伯特·博世有限公司 | Hand-held power tool device |
| CN106914847A (en) * | 2015-12-28 | 2017-07-04 | 南京德朔实业有限公司 | Torque output tool |
| CN106015543A (en) * | 2016-07-19 | 2016-10-12 | 青岛联源通机械有限公司 | Welding spattering-preventing method for split planet carrier |
| CN206913086U (en) * | 2017-07-05 | 2018-01-23 | 浙江格致工具有限公司 | A kind of hand held power machine with centralising device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107139140A (en) | 2017-09-08 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US9108306B2 (en) | Machine tool having a spindle driven by a drive device | |
| US9393711B2 (en) | Hand-held knockout punch driver | |
| US20170129092A1 (en) | Power tool | |
| US7886841B2 (en) | Power tool torque overload clutch | |
| US8011445B2 (en) | Portable power tool, in particular a drilling hammer and/or impact hammer | |
| RU2601529C2 (en) | Power tool | |
| EP3792004B1 (en) | Impact tool with vibration isolation | |
| US9427850B2 (en) | Drywall screwdriver | |
| CN107923492B (en) | Power tool | |
| RU2457104C2 (en) | Hand-held machine | |
| US20150128429A1 (en) | Power Tool and Transmission Thereof | |
| CN107139140B (en) | Hand-held power tool with centering device | |
| KR20160092842A (en) | Automatic tool changer | |
| CN104249346A (en) | Handheld machine tool having a spindle-locking device | |
| EP1872905B1 (en) | Working tool | |
| CN206913086U (en) | A kind of hand held power machine with centralising device | |
| US20110052316A1 (en) | Spline Shaft Assembly | |
| CN109505954B (en) | Driving shaft power transmission device and engine | |
| US20060040750A1 (en) | Shaft coupling assembly | |
| KR101841185B1 (en) | Electrically Driven Chucking System for Machine Tool | |
| CN113386074B (en) | Impact tool | |
| CN220067128U (en) | Hub motor for transmitting large torque | |
| JP2019019911A (en) | Clutch device | |
| CN115789120A (en) | Manual-automatic dual-purpose bidirectional clutch transmission shaft | |
| JP2018051713A (en) | Power tool |
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 | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20211009 Address after: 321300 No. 771 Xiangzhang West Avenue, Xicheng street, Yongkang City, Jinhua City, Zhejiang Province Applicant after: YONGKANG CROWN POWER TOOLS MANUFACTURE Co.,Ltd. Address before: 321017 first floor of plant 5, No. 418 Wenxi street, Jinpan development new area, Jinhua City, Zhejiang Province Applicant before: ZHEJIANG GEZHI TOOLS Co.,Ltd. |
|
| TA01 | Transfer of patent application right | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |