CN206860713U - A kind of freewheel clutch - Google Patents
A kind of freewheel clutch Download PDFInfo
- Publication number
- CN206860713U CN206860713U CN201720770678.7U CN201720770678U CN206860713U CN 206860713 U CN206860713 U CN 206860713U CN 201720770678 U CN201720770678 U CN 201720770678U CN 206860713 U CN206860713 U CN 206860713U
- Authority
- CN
- China
- Prior art keywords
- voussoir
- way
- ring
- main shaft
- working position
- 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.)
- Expired - Fee Related
Links
Landscapes
- Mechanical Operated Clutches (AREA)
Abstract
The utility model discloses a kind of freewheel clutch, and multiple two-way voussoirs are provided between inner ring and outer ring, the control device for switching two-way voussoir working position is provided with main shaft;When all two-way voussoir is in the first working position, two-way voussoir makes inner ring be merely able to rotate forward relative to outer ring;When all two-way voussoir is in the second working position, two-way voussoir makes inner ring be merely able to rotate backward relative to outer ring;When all two-way voussoirs are in three working positions, two-way voussoir enables inner ring and outer ring is two-way relatively rotates;The two-way voussoir in part is in the first working position, and when the two-way voussoir of another part is in the second working position, two-way voussoir makes inner ring and outer ring geo-stationary.Switch the working position of two-way voussoir by control device, make freewheel clutch that there are four kinds of positive mono-directional overrun, reverse mono-directional overrun, bidirectional overtaking and two-way engagement working conditions, realize two-way controllable, meet the needs of multiple-working mode, improve applicability.
Description
Technical field
Clutch field is the utility model is related to, more particularly to a kind of freewheel clutch.
Background technology
Freewheel clutch is widely used in multiple fields, and in the prior art, freewheel clutch is mono-directional overrun clutch
Device, also known as unilateral bearing, it is for power to pass between prime mover and working machine or inside machine between driving shaft and driven shaft
Pass the important component with break function.Using the velocity variations of driving and driven part or the conversion of direction of rotation, to realize clutch work(
Can, by unidirectional locking principle, the transmission of torque is unidirectional, can realize the unidirectional delivery of power.
It is traditional to the demand of its multifunction also more and more higher as freewheel clutch uses the continuous expansion in field
One-way clutch mode of operation is more single, can not meet between prime mover and working machine to the unidirectional or double of clutch power
To the needs of the multiple-working modes such as transmission.
Therefore, how to provide a kind of two-way controllable freewheel clutch is the skill that those skilled in the art need to solve at present
Art problem.
Utility model content
The purpose of this utility model is to provide a kind of freewheel clutch, can be two-way controllable, improves applicability.
In order to solve the above technical problems, the utility model provides a kind of freewheel clutch, including the main shaft, interior being coaxially disposed
Circle and outer ring, the main shaft are fixedly connected with the inner ring, and multiple two-way voussoirs, institute are provided between the inner ring and the outer ring
State the control device being provided with main shaft for switching the two-way voussoir working position;
When all the two-way voussoir is in the first working position, the two-way voussoir makes the inner ring relative to the outer ring
It is merely able to rotate forward;When all the two-way voussoirs are in the second working position, the two-way voussoir make the inner ring relative to
The outer ring is merely able to rotate backward;When all the two-way voussoir is in three working positions, the two-way voussoir makes in described
Circle and the outer ring two-way can relatively rotate;The part two-way voussoir is in the first working position, two-way described in another part
When voussoir is in the second working position, the two-way voussoir makes the inner ring and the outer ring geo-stationary.
Preferably, the two-way voussoir is specially V-type voussoir, and the inner ring periphery is correspondingly arranged on for installing multiple institutes
Multiple mounting grooves at the base angle of V-type voussoir are stated, the outer ring inner circumferential is correspondingly arranged on multiple lock grooves;
When the V-type voussoir is in first working position, the V-type voussoir only has one end drift angle and the corresponding locking
The side of groove offsets;When the V-type voussoir is in second working position, the V-type voussoir only have other end drift angle with it is corresponding
The opposite side of the lock groove offsets;When the V-type voussoir is in three working position, the both ends drift angle of the V-type voussoir
Separated with the both sides of the corresponding lock groove.
Preferably, the control device includes being set in the main shaft and can be around the first control panel of the main axis
With the second control panel, first control panel and second control panel are located at the inner ring both sides and are oppositely arranged, and described
First control sheet of one control panel is installed in the groove of the part V-type voussoir, the second control sheet of second control panel
It is installed on described in another part in the groove of V-type voussoir, first control panel and second control panel can push away when rotating
The V-type voussoir is moved to switch the working position of the V-type voussoir.
Preferably, first control panel is loaded on the main shaft, the first shift fork ring inner side by the first shift fork ring set
It is provided with the first spherical control pin, is provided with the first fork slot around the main shaft on the outside of the first shift fork ring, described the
Two control panels are loaded on the main shaft by the second shift fork ring set, and the second spherical control pin is provided with the inside of the second shift fork ring,
The second fork slot around the main shaft is provided with the outside of the second shift fork ring, helicla flute is provided with the main shaft, it is described
First spherical control pin and the second spherical control pin are installed in the helicla flute and can moved along the helicla flute, lead to
When crossing shift fork the first shift fork ring and the second shift fork ring be pushed axially, first control panel and second control
Plate can rotate along the helicla flute.
Preferably, multiple the first spherical control pins described in clamping and described second spherical of being used for are provided with the helicla flute
The arc lock pin of control pin.
Preferably, it is provided with holddown spring between the V-type voussoir base angle and the mounting groove.
Preferably, it is provided with limited step on the main shaft.
Preferably, the main shaft is connected with the inner ring by singly-bound.
The utility model provides a kind of freewheel clutch, including main shaft, inner ring and the outer ring being coaxially disposed, and main shaft, which is fixed, to be connected
Inner ring is connect, multiple two-way voussoirs are provided between inner ring and outer ring, are provided with main shaft for switching two-way voussoir working position
Control device;When all two-way voussoir is in the first working position, two-way voussoir makes inner ring be merely able to rotate forward relative to outer ring;
When all two-way voussoir is in the second working position, two-way voussoir makes inner ring be merely able to rotate backward relative to outer ring;It is all two-way
When voussoir is in three working positions, two-way voussoir enables inner ring and outer ring is two-way relatively rotates;The two-way voussoir in part is in the
One working position, when the two-way voussoir of another part is in the second working position, two-way voussoir makes inner ring and outer ring geo-stationary.
Switch the working position of two-way voussoir by control device, make freewheel clutch that there is positive mono-directional overrun, reverse list
To surmount, four kinds of working conditions of bidirectional overtaking and two-way engagement, realize two-way controllable, meet the needs of multiple-working mode, carry
High applicability.
Brief description of the drawings
Fig. 1 is a kind of explosive view of embodiment of freewheel clutch provided by the utility model;
Fig. 2 is that a kind of structure of embodiment China and foreign countries control panel of freewheel clutch provided by the utility model is shown
It is intended to;
Fig. 3 shows for the structure of interior control panel in a kind of embodiment of freewheel clutch provided by the utility model
It is intended to;
Fig. 4 is a kind of positive mono-directional overrun work of embodiment of freewheel clutch provided by the utility model
View;
Fig. 5 is a kind of reverse mono-directional overrun work of embodiment of freewheel clutch provided by the utility model
View;
Fig. 6 is a kind of bidirectional overtaking working condition of embodiment of freewheel clutch provided by the utility model
Schematic diagram;
Fig. 7 is a kind of two-way engaging work state of embodiment of freewheel clutch provided by the utility model
Schematic diagram.
Embodiment
Core of the present utility model is to provide a kind of freewheel clutch, can be two-way controllable, improves applicability.
In order that those skilled in the art more fully understand the utility model, below in conjunction with the accompanying drawings and it is embodied
The utility model is described in further detail for mode.
Fig. 1 to Fig. 7 is refer to, Fig. 1 is a kind of embodiment of freewheel clutch provided by the utility model
Explosive view;Fig. 2 is that a kind of structure of embodiment China and foreign countries control panel of freewheel clutch provided by the utility model is shown
It is intended to;Fig. 3 be freewheel clutch provided by the utility model a kind of embodiment in interior control panel structural representation
Figure;Fig. 4 is a kind of positive mono-directional overrun working condition of embodiment of freewheel clutch provided by the utility model
Schematic diagram;Fig. 5 is a kind of reverse mono-directional overrun work of embodiment of freewheel clutch provided by the utility model
View;Fig. 6 is a kind of bidirectional overtaking work of embodiment of freewheel clutch provided by the utility model
View;Fig. 7 is a kind of two-way engaging work of embodiment of freewheel clutch provided by the utility model
View.
The freewheel clutch that the utility model embodiment provides, including main shaft 3, the and of inner ring 600 being coaxially disposed
Outer ring 700, main shaft 3 are fixedly connected with inner ring 600, and multiple two-way voussoirs are provided between inner ring 600 and outer ring 700, are pacified on main shaft 3
Equipped with the control device for switching two-way voussoir working position;Two-way voussoir has three working positions, and control device can control
Two-way voussoir switches between three working positions.
When all two-way voussoir is in the first working position, two-way voussoir makes inner ring 600 be merely able to forward direction relative to outer ring 700
Rotate, now freewheel clutch is in positive mono-directional overrun state;When all two-way voussoir is in the second working position, two-way voussoir
Inner ring 600 is set to be merely able to rotate backward relative to outer ring 700, now freewheel clutch is in reverse mono-directional overrun state;All
When two-way voussoir is in three working positions, two-way voussoir enables inner ring 600 and outer ring 700 is two-way relatively rotates, and now surmounts
Clutch is in bidirectional overtaking state;The two-way voussoir in part is in the first working position, and the two-way voussoir of another part is in the second work
When making position, two-way voussoir makes inner ring 600 and the geo-stationary of outer ring 700, and now freewheel clutch is in two-way engagement status.Wherein
Forward direction is used to represent two opposite directions of motion with inversely (reverse), when it is positive to provide a direction, another direction
As reverse (reverse).
Specifically, limited step is provided with main shaft 3, and main shaft 3 is connected with inner ring 600 by singly-bound, can also use it
His connected mode, such as connected using spline, within the scope of protection of the utility model.
Switch the working position of two-way voussoir by control device, make freewheel clutch that there is positive mono-directional overrun, reverse list
To surmount, four kinds of working conditions of bidirectional overtaking and two-way engagement, realize two-way controllable, meet the needs of multiple-working mode, carry
High applicability.
In the freewheel clutch that the utility model embodiment provides, two-way voussoir has diversified forms, can be with
For V-type voussoir 400, i.e. section is in alphabetical V-type, can also use other forms, such as U-shaped or U shape.The periphery pair of inner ring 600
Multiple mounting grooves at the base angle for installing multiple V-type voussoirs 400 should be provided with, the inner circumferential of outer ring 700 is correspondingly arranged on multiple locks
Only groove, i.e., often there is a V-type voussoir 400, that is, be correspondingly arranged on a mounting groove and a lock groove.
When V-type voussoir 400 is in the first working position, control device tilts V-type voussoir 400, it there was only one end drift angle
Offseted with the side of corresponding lock groove, this V-type voussoir 400 can make inner ring 600 can not be relative to outer ring 700 to offseting
Side rotates, and is merely able to rotate to opposite side, when whole V-type voussoirs 400 same one end drift angle and corresponding lock groove it is same
When side offsets, freewheel clutch is in positive mono-directional overrun state.
When V-type voussoir 400 is in the second working position, control device tilts V-type voussoir 400, it there was only other end top
Angle offsets with the opposite side of corresponding lock groove, and this V-type voussoir 400 can make inner ring 600 can not be relative to outer ring 700 to phase
The side supported rotates, and is merely able to rotate to opposite side, when other end drift angle and the corresponding lock groove of whole V-type voussoirs 400
When opposite side offsets, freewheel clutch is in reverse mono-directional overrun state.
When V-type voussoir 400 is in three working positions, control device makes the both ends drift angle of V-type voussoir 400 and corresponding lock groove
Both sides separate, this V-type voussoir 400 can enable inner ring 600 relative to the Double-directional rotary of outer ring 700, when whole V-type wedges
When the both ends drift angle of block 400 separates with the both sides of corresponding lock groove, freewheel clutch is in bidirectional overtaking state.
Therefore, when part V-type voussoir 400 is in the first working position, another part V-type voussoir 400 is in the second work
During position, control device makes multiple V-type voussoirs 400 be tilted respectively to both direction, and inner ring 600 is relative to the both direction of outer ring 700
Not rotatable, freewheel clutch is in two-way engagement status.
Control device includes the first control panel 100 and the second control panel that is set in main shaft 3 and can be rotated around main shaft 3
200, the first control panel 100 and the second control panel 200 are located at the both sides of inner ring 600 and are oppositely arranged, and the first of the first control panel 100
Control sheet 101 is installed in the groove of part V-type voussoir 400, and the second control sheet 201 of the second control panel 200 is installed on another
In the groove of part V-type voussoir 400, the first control panel 100 and the second control panel 200 can be promoted when rotating V-type voussoir 400 with
Switch the working position of V-type voussoir 400.When first control panel 100 and the second control panel 200 rotate, the first control sheet can be passed through
101 and second control sheet 201 promote V-type voussoir 400 to be tilted to different directions, V-type voussoir 400 is in different operating position.
First control panel 100 is set in main shaft 3 by the first shift fork ring 102, and the inner side of the first shift fork ring 102 is provided with first
Spherical control pin 103, the outside of the first shift fork ring 102 are provided with the first fork slot around main shaft 3, and the second control panel 200 passes through
Second shift fork ring 202 is set in main shaft 3, and the inner side of the second shift fork ring 202 is provided with the second spherical control pin 203, the second shift fork ring
202 outsides are provided with the second fork slot around main shaft 3, are provided with helicla flute on main shaft 3, first is pushed axially by shift fork
During 102 and second shift fork ring 202 of shift fork ring, the first spherical 103 and second spherical control pin 203 of control pin is installed in helicla flute
And can be moved along helicla flute, the first control panel 100 and the second control panel 200 can rotate along helicla flute.In this way,
It is easy to control, axially promotes shift fork, you can linear motion is converted to the spiral of the first control panel 100 and the second control panel 200
Motion, realizes the rotation of the first control panel 100 and the second control panel 200.
It can also be set in helicla flute and multiple be used for the spherical 103 and second spherical control pin 203 of control pin of clamping first
Arc lock pin.For fixing the position of the first spherical 103 and second spherical control pin 203 of control pin, mode of operation is realized
Locking.In order to improve holddown spring 500 is provided between the base angle of stabilization of equipment performance V-type voussoir 400 and mounting groove.
During positive mono-directional overrun state, the first spherical 103 and second spherical control pin 203 of control pin is in the position of outer end
To put, the first control sheet 101 and the second control sheet 201 are located at 402 right position of the first V-type voussoir 401 and the second V-type voussoir, wherein with
The contact of first control sheet 101 for the second V-type voussoir 402, contacted with the second control sheet 201 for the first V-type voussoir 401.
In the presence of holddown spring 500, the first V-type voussoir 401 and the second V-type voussoir 402 are that left end tilts certain angle, with outer ring
700 engagements, realize positive mono-directional overrun.
During reverse mono-directional overrun state, the first spherical 103 and second spherical control pin 203 of control pin is in the position of the inner
Put, the first control sheet 101 and the second control sheet 201 are located at 402 left position of the first V-type voussoir 401 and the second V-type voussoir.Compressing
In the presence of spring 500, the first V-type voussoir 401 and the second V-type voussoir 402 are that right-hand member tilts certain angle, with outer ring 700
Engagement, realizes reverse mono-directional overrun.
During bidirectional overtaking state, the first spherical interjacent position of spherical control pin 203 of control pin 103 and second,
First control sheet 101 and the second control sheet 201 are located at the first V-type voussoir 401 and the middle position of the second V-type voussoir 402.First V-type wedge
The V-type voussoir 402 of block 401 and second is fixed in the mounting groove of inner ring 600, and left and right ends separate with outer ring 700, is realized two-way super
More.
During two-way engagement status, the second ball-type control pin 203 is in the position of the inner, and the second control sheet 201 is located at the first V
401 left position of type gear block, in the presence of holddown spring 500, right-hand member tilts certain angle, is engaged with outer ring 700.First ball-type
Control pin 103 is in the position of outer end, and the first control sheet 101 is located at 402 right position of the second V-type gear block, in holddown spring 500
Under effect, left end tilts certain angle, is engaged with outer ring 700, so as to realize two-way engagement.
Above-mentioned left and right according to circumstances defines positive and reverse at this under different situations merely to difference both direction
Within the protection domain of utility model.
Specifically, six V-type voussoirs 400 can be uniformly arranged, the first control panel 100 includes three the first control sheets 101,
Second control panel 200 includes three the second control sheets 201, and the first control sheet 101 and the second control sheet 201 are alternately installed on six
In the groove of V-type voussoir 400.Also the quantity and set-up mode of each part can be according to circumstances adjusted, in guarantor of the present utility model
Within the scope of shield.
Freewheel clutch provided by the utility model is described in detail above.Specific case used herein
Principle of the present utility model and embodiment are set forth, the explanation of above example is only intended to help and understands this practicality
New method and its core concept.It should be pointed out that for those skilled in the art, this reality is not being departed from
On the premise of with new principle, some improvement and modification can also be carried out to the utility model, these are improved and modification is also fallen into
In the protection domain of the utility model claims.
Claims (8)
1. a kind of freewheel clutch, it is characterised in that including the main shaft (3), inner ring (600) and outer ring (700) being coaxially disposed, institute
State main shaft (3) and be fixedly connected with the inner ring (600), be provided between the inner ring (600) and the outer ring (700) multiple two-way
Voussoir, the control device for switching the two-way voussoir working position is installed on the main shaft (3);
When all the two-way voussoir is in the first working position, the two-way voussoir makes the inner ring (600) relative to described outer
Circle (700) is merely able to rotate forward;When all the two-way voussoir is in the second working position, the two-way voussoir makes the inner ring
(600) it is merely able to rotate backward relative to the outer ring (700);It is described when all the two-way voussoir is in three working positions
Two-way voussoir makes the inner ring (600) and the outer ring (700) two-way can relatively rotate;The part two-way voussoir is in the
One working position, when two-way voussoir is in the second working position described in another part, the two-way voussoir makes the inner ring (600) and institute
State outer ring (700) geo-stationary.
2. freewheel clutch according to claim 1, it is characterised in that the two-way voussoir is specially V-type voussoir
(400), inner ring (600) periphery is correspondingly arranged on multiple installations at the base angle for installing multiple V-type voussoirs (400)
Groove, outer ring (700) inner circumferential are correspondingly arranged on multiple lock grooves;
When the V-type voussoir (400) is in first working position, the V-type voussoir (400) only has one end drift angle and corresponding institute
The side for stating lock groove offsets;When the V-type voussoir (400) is in second working position, the V-type voussoir (400) is only
Other end drift angle offsets with the opposite side of the corresponding lock groove;When the V-type voussoir (400) is in three working position,
The both ends drift angle of the V-type voussoir (400) separates with the both sides of the corresponding lock groove.
3. freewheel clutch according to claim 2, it is characterised in that the control device includes being set in the main shaft
(3) and can be around the first control panel (100) and the second control panel (200) of the main shaft (3) rotation, first control panel
(100) it is located at the inner ring (600) both sides with second control panel (200) and is oppositely arranged, first control panel (100)
The first control sheet (101) be installed in the groove of the part V-type voussoir (400), the second of second control panel (200)
Control sheet (201) is installed on described in another part in the groove of V-type voussoir (400), first control panel (100) and described
Two control panels (200) can promote the V-type voussoir (400) to switch the working position of the V-type voussoir (400) when rotating.
4. freewheel clutch according to claim 3, it is characterised in that first control panel (100) passes through first group
Fork ring (102) is set in the main shaft (3), and the first spherical control pin (103) is provided with the inside of the first shift fork ring (102),
The first fork slot around the main shaft (3), second control panel (200) are provided with the outside of the first shift fork ring (102)
The main shaft (3) is set in by the second shift fork ring (202), the second spherical control is provided with the inside of the second shift fork ring (202)
Make and sell (203), the second fork slot around the main shaft (3), the main shaft are provided with the outside of the second shift fork ring (202)
(3) helicla flute is provided with, the first spherical control pin (103) and the second spherical control pin (203) are installed on described
It can move in helicla flute and along the helicla flute, the first shift fork ring (102) and described the are pushed axially by shift fork
During two shift fork ring (202), first control panel (100) and second control panel (200) can rotate along the helicla flute.
5. freewheel clutch according to claim 4, it is characterised in that be provided with the helicla flute and multiple be used for clamping
The first spherical control pin (103) and the arc lock pin of the second spherical control pin (203).
6. freewheel clutch according to claim 5, it is characterised in that V-type voussoir (400) base angle and the installation
Holddown spring (500) is provided between groove.
7. according to the freewheel clutch described in claim 1 to 6 any one, it is characterised in that be provided with the main shaft (3)
Limited step.
8. freewheel clutch according to claim 7, it is characterised in that the main shaft (3) passes through with the inner ring (600)
Singly-bound connects.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201720770678.7U CN206860713U (en) | 2017-06-28 | 2017-06-28 | A kind of freewheel clutch |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201720770678.7U CN206860713U (en) | 2017-06-28 | 2017-06-28 | A kind of freewheel clutch |
Publications (1)
Publication Number | Publication Date |
---|---|
CN206860713U true CN206860713U (en) | 2018-01-09 |
Family
ID=60829225
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN201720770678.7U Expired - Fee Related CN206860713U (en) | 2017-06-28 | 2017-06-28 | A kind of freewheel clutch |
Country Status (1)
Country | Link |
---|---|
CN (1) | CN206860713U (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN107091285A (en) * | 2017-06-28 | 2017-08-25 | 广东工业大学 | A kind of freewheel clutch |
WO2020088193A1 (en) * | 2018-10-31 | 2020-05-07 | 周承岗 | Duel-block overrunning clutch |
CN111120541A (en) * | 2018-10-31 | 2020-05-08 | 周承岗 | Double block overrunning clutch |
-
2017
- 2017-06-28 CN CN201720770678.7U patent/CN206860713U/en not_active Expired - Fee Related
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN107091285A (en) * | 2017-06-28 | 2017-08-25 | 广东工业大学 | A kind of freewheel clutch |
WO2020088193A1 (en) * | 2018-10-31 | 2020-05-07 | 周承岗 | Duel-block overrunning clutch |
CN111120541A (en) * | 2018-10-31 | 2020-05-08 | 周承岗 | Double block overrunning clutch |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CN107091285A (en) | A kind of freewheel clutch | |
CN206860713U (en) | A kind of freewheel clutch | |
CN100595448C (en) | Tri-state overrunning clutch | |
US20080093190A1 (en) | Switching Device For A Motor Vehicle And Of This Device | |
CN105190074A (en) | Wedge clutch with a split hub | |
CN102345688A (en) | Centrifugal force combined with sliding damping type torque actuated clutch | |
CN102345687A (en) | Clutch actuated by initial limit-torque sliding damping | |
US20200072351A1 (en) | Gearbox and parking mechanism therof | |
CN207261506U (en) | A kind of freewheel clutch | |
US9328782B2 (en) | Two-way clutch | |
CN101398041B (en) | Composite type overrunning clutch | |
CN100460702C (en) | Single-direction clutching mechanism | |
CN101334076A (en) | Mixing power drive system | |
CN103935238A (en) | Electric vehicle and electric drive system for electric vehicle | |
WO2014166025A1 (en) | Washing machine driving mechanism | |
CN103089941A (en) | Automatic gearbox | |
CN107131224B (en) | Overrun clutch | |
TW475042B (en) | Differential gears | |
EP4215774A1 (en) | Drive transmission device for vehicle | |
CN207989585U (en) | A kind of automobile synchronizer | |
CN101398042B (en) | Composite type overrunning clutch | |
CN205780440U (en) | A kind of brake locking formula freewheel clutch | |
CN106195192A (en) | A kind of electric automobile and two grades of change speed gear boxes thereof | |
CN104315030A (en) | Electromagnetic clutch | |
CN205487778U (en) | Well operating device is crossed to spring and operating handle thereof |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
GR01 | Patent grant | ||
GR01 | Patent grant | ||
CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180109 Termination date: 20190628 |
|
CF01 | Termination of patent right due to non-payment of annual fee |