CN206738267U - Termination of pumping pressure-keeping mechanism and the steel ball processing grinding machine with the termination of pumping pressure-keeping mechanism - Google Patents
Termination of pumping pressure-keeping mechanism and the steel ball processing grinding machine with the termination of pumping pressure-keeping mechanism Download PDFInfo
- Publication number
- CN206738267U CN206738267U CN201720465754.3U CN201720465754U CN206738267U CN 206738267 U CN206738267 U CN 206738267U CN 201720465754 U CN201720465754 U CN 201720465754U CN 206738267 U CN206738267 U CN 206738267U
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- termination
- swing arm
- pumping pressure
- fixed
- keeping mechanism
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Abstract
A kind of termination of pumping pressure-keeping mechanism disclosed in the utility model, including cabinet, supporting plate, hydraulic cylinder assembly, oil pump and accumulator, supporting plate is fixedly connected with cabinet, hydraulic cylinder assembly includes cylinder body, protecgulum, bonnet, piston and piston rod, and activity through bonnet and supporting plate and is fixedly connected with nut successively for the rear end of piston rod；The front side of supporting plate is provided with disc spring group, and disc spring group axial limiting is between the step of piston rod and supporting plate；Formed with front chamber between cylinder body, protecgulum and piston, formed with rear chamber between cylinder body, bonnet and piston, piston rod is respectively equipped with the first oil circuit connected with front chamber, the second oil circuit connected with rear chamber vertically.The utility model is simple and reasonable, and grinding machine is in processing, without making oil pump work all the time, just can effectively ensure that oil cylinder keeps larger output pressure, can either effectively save energy consumption, while operating noise can also be reduced, effects of energy conservation and environmental protection is preferable.
Description
Technical field
Steel ball processing apparatus technical field is the utility model is related to, more particularly to a kind of termination of pumping pressure-keeping mechanism and with described
The steel ball processing grinding machine of termination of pumping pressure-keeping mechanism.
Background technology
Grinding machine is one of capital equipment for processing steel ball processing, and its principle is steel ball is being rotated sand by systemic circulation method
Processing is ground in alley between wheel and fixed emery wheel.The fixed emery wheel of grinding machine is typically connected with oil cylinder, by oil cylinder come
Keep fixed emery wheel and rotate the relative position between emery wheel.Existing grinding machine is in processing, it usually needs oil pump is protected all the time
Work is held, pressurize is carried out to oil cylinder by oil pump, so that oil cylinder has larger output pressure all the time.But because oil pump begins
It is in running order eventually, it can not only increase energy consumption, and larger operating noise can be produced, it is unfavorable for energy-conserving and environment-protective.
Utility model content
The defects of the purpose of this utility model is to be directed to prior art and deficiency, there is provided a kind of termination of pumping pressure-keeping mechanism and tool
There is the steel ball processing grinding machine of the termination of pumping pressure-keeping mechanism, its is simple and reasonable, and grinding machine is in processing, without making oil pump work all the time
Make, just can effectively ensure that oil cylinder keeps larger output pressure, can either effectively save energy consumption, while work can also be reduced
Noise, effects of energy conservation and environmental protection are preferable.
To achieve the above object, the utility model uses following technical scheme.
A kind of termination of pumping pressure-keeping mechanism, including cabinet, supporting plate, hydraulic cylinder assembly, oil pump and accumulator, the supporting plate and institute
State cabinet to be fixedly connected, the hydraulic cylinder assembly includes cylinder body, protecgulum, bonnet, piston and piston rod, and the cylinder body can be axial
Movably in the cabinet, the protecgulum integration is connected to the front end of the cylinder body, and the bonnet is fixedly connected on
The rear end of the cylinder body, the piston are movably arranged in the cylinder body, and the front end of the piston rod is fixed with the piston
Connection, activity through the bonnet and the supporting plate and is fixedly connected with nut successively for the rear end of the piston rod；The branch
The front side of fagging is provided with disc spring group, and the disc spring group is sheathed on the outside of piston rod, and the piston rod has and the disc spring group
Corresponding step, the disc spring group axial limiting is between the step and the supporting plate；
Formed with front chamber, the cylinder body, the bonnet and institute between the cylinder body, the protecgulum and the piston
State between piston formed with rear chamber, the piston rod be respectively equipped with vertically connected with the front chamber the first oil circuit, with
Second oil circuit of rear chamber connection, the oil pump is connected by the first pipeline with first oil circuit respectively, passes through the
Two pipelines are connected with second oil circuit, and the accumulator is connected by the 3rd pipeline with first pipeline.
Further, the disc spring group includes some disc springs, and string is located at the piston to some disc springs successively vertically
The outside of bar.
A kind of grinding machine with the termination of pumping pressure-keeping mechanism, including rotate grinding wheel component, fixed emery wheel component and described stop
Pump pressure-keeping mechanism, the rubbing surface of the rubbing surface and the fixed emery wheel component for rotating grinding wheel component are oppositely arranged, described turn
Dynamic grinding wheel component is fixedly attached to transmission main shaft, and the fixed emery wheel component is fixedly attached to the oil cylinder of the termination of pumping pressure-keeping mechanism
The front end of body.
Further, the rotor plate and rotation emery wheel for rotating grinding wheel component and including being fixed together, the transmission master
Axle is fixedly connected with the rotor plate；The fixed emery wheel component includes fixed plate and the fixed emery wheel being fixed together, described
Fixed plate is fixedly installed on the front end of the cylinder body.
Further, in addition to burring machine, the burring machine includes seat board, reducing motor, swing arm and cutter head, described
Reducing motor is fixedly installed on the seat board, and the output shaft of the reducing motor is fixed with crank, and the crank passes through connecting rod
It is connected with the top of the swing arm, the middle part of the swing arm is rotatablely connected with the seat board, and the bottom of the swing arm is stretched into
Between the rubbing surface of the rotation grinding wheel component and the rubbing surface of the fixed emery wheel component, and the cutter head be fixed on it is described
On the side relative with the rubbing surface of the rotation grinding wheel component of swing arm bottom.
Further, bearing block is provided with the seat board, the swing arm is fixedly arranged in the middle of swing arm pin handle, the swing arm pin
Handle is rotatably assorted with the bearing block, and clutch shaft bearing is provided between the bearing block and the swing arm pin handle.
Further, crank pin handle is fixed with the crank, the crank passes through the crank pin handle and the connecting rod
Rotation connection, second bearing is provided between the crank pin handle and the connecting rod.
Further, the top of the swing arm is fixed with rocking bar, and the swing arm passes through the rocking bar and the link rotatable
Connection.
Further, the swing arm includes straight portion and " C " shape portion, and the junction in the straight portion and " C " the shape portion rotates
The seat board is connected to, the free end in the straight portion is connected to the connecting rod, and the cutter head is fixed to the freedom in " C " the shape portion
End.
The beneficial effects of the utility model are：Termination of pumping pressure-keeping mechanism provided by the utility model and there is the termination of pumping pressurize
The steel ball processing grinding machine of mechanism, by being subject to Optimal improvements to the structure of hydraulic system, specifically, by using can relative machine
The hydraulic cylinder assembly of case axial movement, and configure with the accumulator and disc spring group of hydraulic cylinder assembly cooperating, during work, by accumulator
Hydraulic energy-accumulating is provided for hydraulic cylinder assembly, mechanical potential is provided for hydraulic cylinder assembly by disc spring group, so that oil pump without protecting all the time
Work is held, hydraulic cylinder assembly just can be made to keep larger constant output pressure, fixed emery wheel component is effectively ensured with rotating emery wheel
Relative axial position between component, so that it is guaranteed that the stabilization of grinding machine, continuous firing, are both effectively saved energy consumption, while also drop
Low operating noise, effects of energy conservation and environmental protection are preferable.The utility model structure setting advantages of simple.
Brief description of the drawings
Fig. 1 is the overall structure diagram of termination of pumping pressure-keeping mechanism described in the utility model.
Fig. 2 is the overall structure diagram of grinding machine described in the utility model.
Fig. 3 is the structural representation of burring machine described in the utility model.
Fig. 4 is the mplifying structure schematic diagram of A-A in Fig. 3.
Fig. 5 is the mplifying structure schematic diagram of D-D in Fig. 3
In Fig. 1-5：1st, cabinet；2nd, supporting plate；3rd, oil pump；31st, the first pipeline；32nd, second pipe；4th, accumulator；41st,
Three pipelines；5th, cylinder body；6th, protecgulum；7th, bonnet；8th, piston；9th, piston rod；91st, step；92nd, the first oil circuit；93rd, the second oil
Road；10th, nut；11st, disc spring group；12nd, front chamber；13rd, rear chamber；141st, rotor plate；142nd, emery wheel is rotated；151st, fixed plate；
152nd, fixed emery wheel；16th, transmission main shaft；17th, seat board；18th, reducing motor；19th, swing arm；191st, straight portion；192nd, " C " shape portion；20、
Cutter head；21st, crank；22nd, connecting rod；23rd, rocking bar；24th, bearing block；25th, swing arm pin handle；26th, clutch shaft bearing；27th, crank pin handle；
28th, second bearing.
Embodiment
The utility model is further described below in conjunction with the accompanying drawings.
It is embodiment one of the present utility model below.
A kind of termination of pumping pressure-keeping mechanism, referring to Fig. 1, including cabinet 1, supporting plate 2, hydraulic cylinder assembly, oil pump 3 and accumulator 4, branch
Fagging 2 is fixedly connected with cabinet 1, and hydraulic cylinder assembly includes cylinder body 5, protecgulum 6, bonnet 7, piston 8 and piston rod 9, and cylinder body 5 can
Axially movably in cabinet 1, the integration of protecgulum 6 is connected to the front end of cylinder body 5, and bonnet 7 is fixedly connected on cylinder body 5
Rear end, piston 8 are movably arranged in cylinder body 5, and the front end of piston rod 9 is fixedly connected with piston 8, and the rear end of piston rod 9 is lived successively
Move through bonnet 7 and supporting plate 2 and be fixedly connected with nut 10；The front side of supporting plate 2 is provided with disc spring group 11, and disc spring group 11 is arranged
In the outside of piston rod 9, piston rod 9 has a step 91 corresponding with disc spring group 11, the axial limiting of disc spring group 11 in step 91 with
Between supporting plate 2.
Formed with front chamber 12 between cylinder body 5, protecgulum 6 and piston 8, between cylinder body 5, bonnet 7 and piston 8 formed with
Rear chamber 13, piston rod 9 are respectively equipped with the first oil circuit 92 connected with front chamber 12, connected with rear chamber 13 second vertically
Oil circuit 93, oil pump 3 are connected by the first pipeline 31 with the first oil circuit 92, by the phase of 32 and second oil circuit of second pipe 93 respectively
Connection, accumulator 4 are connected by the 3rd pipeline 41 with the first pipeline 31.
Preferably, disc spring group 11 includes some disc springs, and string is located at the outside of piston rod 9 to some disc springs successively vertically, really
Having protected disc spring group 11 can have larger potential energy to export.
The operation principle of termination of pumping pressure-keeping mechanism provided by the utility model：During installation, the fixed emery wheel component of grinding machine is fixed
Be installed on the front end of cylinder body 5, during work, under pressurized state, start oil pump 3 first, oil pump 3 by the fuel feeding of the first pipeline 31,
Now, the fluid part in the first pipeline 31 enters in front chamber 12 through the first oil circuit 92, and another part is then through the 3rd pipeline
41 enter accumulator 4, accumulation of energy are carried out for accumulator 4, in the initial instant of the oil-feed of front chamber 12, oil of the piston 8 in front chamber 12
Under pressure effect, driving piston rod 9 moves afterwards vertically in advance, and piston rod 9 is during rear shifting, and disc spring group 11 is by piston rod 9
The axial compression effect of step 91 so that disc spring group 11 is gradually compressed（I.e. disc spring group 11 generates mechanical potential）, work as disc spring
When being compressed completely, piston rod 9 moves group 11 after can not continuing, thus piston 8 also will not continue to after move, now, cylinder body 5 will
Moved forward under the oil pressure effect of front chamber 12 relative to cabinet 1, driving fixed emery wheel component synchronization reach, until fixed emery wheel group
Part moves to setting position（That is Working position）, oil pump 3 is now closed, under the accumulation of energy effect of accumulator 4, is made by accumulator 4
Front chamber 12 keeps stable oil pressure；After grinding machine work a period of time, due to rotating emery wheel 142 and the rubbing surface of fixed emery wheel 152
Abrasion, rotate the trend that reduction occurs in the axial gap between emery wheel 142 and fixed emery wheel 152 so that hydraulic cylinder assembly pair
The axial force of disc spring group 11 reduces, and the mechanical potential that now disc spring group 11 is laid in by itself will be anti-by piston rod 9
Hydraulic cylinder assembly is acted on, forces hydraulic cylinder assembly integral forward lead, so that the axle between fixed emery wheel component and rotation grinding wheel component
To gap remained constant, it is ensured that the normal work of grinding machine；With working on for grinding machine, under the oil pressure of front chamber 12 occurs
Drop, is now just again started up oil pump 3, the oil pressure of front chamber 12 is continued stabilization；When grinding machine is stopped, the fluid of front chamber 12
Through the first oil circuit 92 and the reflux pressure letdown of the first pipeline 31, meanwhile, using oil pump 3 from the oil circuit 93 of second pipe 32 and second to back cavity
The fuel feeding of room 13, now, piston 8 drive piston rod 9 to move forward first, 11 gradual homing of disc spring group, when the spiral shell of the rear end of piston rod 9
When mother 10 contradicts with supporting plate 2, piston rod 9 can not continue to move forward, and piston 8 can not continue to move forward, and now, cylinder body 5 will
Under the oil pressure effect of rear chamber 13, moved after driving fixed emery wheel component.Certainly, it is necessary to illustrate be, in Hydraulic Field, oil pump 3
Generally it is that oil circuit switching is carried out by solenoid directional control valve, fuel feeding is carried out with the rod chamber to oil cylinder or rodless cavity, not done herein
Repeat.
It is embodiment two of the present utility model below.
A kind of grinding machine with termination of pumping pressure-keeping mechanism, referring to Fig. 1-5, including rotate grinding wheel component, fixed emery wheel component and
Termination of pumping pressure-keeping mechanism, the rubbing surface for rotating the rubbing surface and fixed emery wheel component of grinding wheel component are oppositely arranged, and rotate grinding wheel component
Transmission main shaft 16 is fixedly attached to, drives rotation emery wheel 142 to rotate by transmission main shaft 16 by mainshaft mechanism, fixed emery wheel component
It is fixedly attached to the front end of the cylinder body 5 of termination of pumping pressure-keeping mechanism.
Specifically, rotor plate 141 and rotation emery wheel 142 that grinding wheel component includes being fixed together, transmission main shaft are rotated
16 are fixedly connected with rotor plate 141；Fixed emery wheel component includes fixed plate 151 and the fixed emery wheel 152 being fixed together, fixed
Plate 151 is fixedly installed on the front end of cylinder body 5.
In the present embodiment, the structure and working principle of termination of pumping pressure-keeping mechanism is identical with above-described embodiment one, therefore does not do herein
Repeat.
In summary, termination of pumping pressure-keeping mechanism provided by the utility model and the steel ball processing with termination of pumping pressure-keeping mechanism are ground
Bed, by being subject to Optimal improvements to the structure of hydraulic system so that oil pump 3 need not remain work, and oil cylinder just can be made total
Into larger constant output pressure is kept, fixed emery wheel component is effectively ensured and rotates the axially opposing position between grinding wheel component
Put, so that it is guaranteed that the stabilization of grinding machine, continuous firing, are both effectively saved energy consumption, while also reduce operating noise, energy-conserving and environment-protective
Effect is preferable.
In addition, because abrasion, alley are deepened after rotating the work a period of time of emery wheel 142, it is therefore desirable to correct.The present embodiment
In, grinding machine also includes burring machine, and burring machine includes seat board 17, reducing motor 18, swing arm 19 and cutter head 20, reducing motor 18
It is fixedly installed on seat board 17, the output shaft of reducing motor 18 is fixed with crank 21, and crank 21 passes through connecting rod 22 and swing arm 19
Top is connected, and the top of swing arm 19 is fixed with rocking bar 23, and swing arm 19 is rotatablely connected by rocking bar 23 and connecting rod 22, specifically
Say, middle part and the seat board 17 of swing arm 19 are rotatablely connected, and the bottom of swing arm 19 is inserted into the rubbing surface for rotating grinding wheel component and fixation
Between the rubbing surface of grinding wheel component, and cutter head 20 is fixed on the side relative with the rubbing surface of rotation grinding wheel component of the bottom of swing arm 19
On face.
Preferably, swing arm 19 includes straight portion 191 and " C " shape portion 192, and the junction in straight portion 191 and " C " shape portion 192 rotates
Seat board 17 is connected to, the free end in straight portion 191 is connected to connecting rod 22 by rocking bar 23, and cutter head 20 is fixed to oneself of " C " shape portion 192
By holding.By using the above-mentioned structure of swing arm 19, be advantageous to increase the amplitude of fluctuation of swing arm 19 so that the amplitude of fluctuation of cutter head 20
It is larger, it is ensured that cutter head 20 can fully contact with rotating the rubbing surface of emery wheel 142, improve correction area and precision.
Preferably, be provided with bearing block 24 in seat board 17, swing arm 19 is fixedly arranged in the middle of swing arm pin handle 25, swing arm pin handle 25 and
Bearing block 24 is rotatably assorted, and clutch shaft bearing 26 is provided between bearing block 24 and swing arm pin handle 25.In the present embodiment, clutch shaft bearing
26 be deep groove ball bearing.By setting swing arm pin handle 25, bearing block 24 and clutch shaft bearing 26, so as to reduce seat board 17 and swing arm
Frictional resistance between 19 so that sensitivity is higher.
Preferably, crank pin handle 27 is fixed with crank 21, crank 21 is rotatablely connected by crank pin handle 27 and connecting rod 22,
Second bearing 28 is provided between crank pin handle 27 and connecting rod 22.In the present embodiment, second bearing 28 is band sealing ring deep-groove ball
Bearing.By setting crank pin handle 27 and second bearing 28, the frictional force between connecting rod 22 and crank 21 is effectively reduced, enters one
Step improves sensitivity.
Burring machine when mounted, makes cutter head 20 be close to the rubbing surface for rotating emery wheel 142, during work, starts reducing motor
18, reducing motor 18 coordinates driving swing arm 19 to be swung relative to seat board 17 by crank 21 and connecting rod 22, by swing arm 19 with moving knife
First 20 synchronous hunting, now, using cutter head 20 with it is in running order under the phase mutual friction of rotation emery wheel 142, so as to just realizing
Amendment to rotating emery wheel 142.
Described above is only better embodiment of the present utility model, therefore all according to described in the utility model patent application range
The equivalent change or modification done of construction, feature and principle, be included in the utility model patent application range.
Claims (9)
- A kind of 1. termination of pumping pressure-keeping mechanism, it is characterised in that：It is described including cabinet, supporting plate, hydraulic cylinder assembly, oil pump and accumulator Supporting plate is fixedly connected with the cabinet, and the hydraulic cylinder assembly includes cylinder body, protecgulum, bonnet, piston and piston rod, the oil For cylinder body axially displaceably in the cabinet, the protecgulum integration is connected to the front end of the cylinder body, the bonnet The rear end of the cylinder body is fixedly connected on, the piston is movably arranged in the cylinder body, the front end of the piston rod and institute State piston to be fixedly connected, activity through the bonnet and the supporting plate and is fixedly connected with spiral shell successively for the rear end of the piston rod It is female；The front side of the supporting plate is provided with disc spring group, and the disc spring group is sheathed on the outside of piston rod, and the piston rod has and institute Step corresponding to disc spring group is stated, the disc spring group axial limiting is between the step and the supporting plate；Formed with front chamber, the cylinder body, the bonnet and the work between the cylinder body, the protecgulum and the piston Formed with rear chamber between plug, the piston rod be respectively equipped with vertically connected with the front chamber the first oil circuit, with it is described Second oil circuit of rear chamber's connection, the oil pump are connected by the first pipeline with first oil circuit, by the second pipe respectively Road is connected with second oil circuit, and the accumulator is connected by the 3rd pipeline with first pipeline.
- 2. termination of pumping pressure-keeping mechanism according to claim 1, it is characterised in that：The disc spring group includes some disc springs, some String is located at the outside of the piston rod to the disc spring successively vertically.
- A kind of 3. grinding machine with termination of pumping pressure-keeping mechanism as claimed in claim 1 or 2, it is characterised in that：Including rotating emery wheel group Part, fixed emery wheel component and the termination of pumping pressure-keeping mechanism, the rubbing surface for rotating grinding wheel component and the fixed emery wheel component Rubbing surface be oppositely arranged, it is described rotation grinding wheel component be fixedly attached to transmission main shaft, the fixed emery wheel component is fixedly connected To the front end of the cylinder body of the termination of pumping pressure-keeping mechanism.
- 4. there is the grinding machine of termination of pumping pressure-keeping mechanism according to claim 3, it is characterised in that：The rotation grinding wheel component includes The rotor plate and rotation emery wheel, the transmission main shaft being fixed together are fixedly connected with the rotor plate；The fixed emery wheel group Part includes the fixed plate being fixed together and fixed emery wheel, the fixed plate are fixedly installed on the front end of the cylinder body.
- 5. there is the grinding machine of termination of pumping pressure-keeping mechanism according to claim 3, it is characterised in that：Also include burring machine, it is described Burring machine includes seat board, reducing motor, swing arm and cutter head, and the reducing motor is fixedly installed on the seat board, described to subtract The output shaft of speed motor is fixed with crank, and the crank is connected by the top of connecting rod and the swing arm, the swing arm Middle part is rotatablely connected with the seat board, and the bottom of the swing arm is inserted into the rubbing surface of the rotation grinding wheel component and the fixation Between the rubbing surface of grinding wheel component, and the cutter head is fixed on the rubbing surface with the rotation grinding wheel component of the swing arm bottom On relative side.
- 6. there is the grinding machine of termination of pumping pressure-keeping mechanism according to claim 5, it is characterised in that：Bearing is provided with the seat board Seat, the swing arm is fixedly arranged in the middle of swing arm pin handle, and the swing arm pin handle is rotatably assorted with the bearing block, the bearing block and Clutch shaft bearing is provided between the swing arm pin handle.
- 7. there is the grinding machine of termination of pumping pressure-keeping mechanism according to claim 5, it is characterised in that：Crank is fixed with the crank Pin handle, the crank are connected by the crank pin handle with the link rotatable, are set between the crank pin handle and the connecting rod It is equipped with second bearing.
- 8. there is the grinding machine of termination of pumping pressure-keeping mechanism according to claim 5, it is characterised in that：The top of the swing arm is fixed with Rocking bar, the swing arm are connected by the rocking bar with the link rotatable.
- 9. there is the grinding machine of termination of pumping pressure-keeping mechanism according to claim 5, it is characterised in that：The swing arm include straight portion and The junction in " C " shape portion, the straight portion and " C " the shape portion is rotatablely connected to the seat board, the free end connection in the straight portion To the connecting rod, the cutter head is fixed to the free end in " C " the shape portion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720465754.3U CN206738267U (en) | 2017-04-28 | 2017-04-28 | Termination of pumping pressure-keeping mechanism and the steel ball processing grinding machine with the termination of pumping pressure-keeping mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720465754.3U CN206738267U (en) | 2017-04-28 | 2017-04-28 | Termination of pumping pressure-keeping mechanism and the steel ball processing grinding machine with the termination of pumping pressure-keeping mechanism |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206738267U true CN206738267U (en) | 2017-12-12 |
Family
ID=60562288
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720465754.3U Withdrawn - After Issue CN206738267U (en) | 2017-04-28 | 2017-04-28 | Termination of pumping pressure-keeping mechanism and the steel ball processing grinding machine with the termination of pumping pressure-keeping mechanism |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206738267U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106907358A (en) * | 2017-04-28 | 2017-06-30 | 宁波奉化精瑞钢球有限公司 | Termination of pumping pressure-keeping mechanism and the steel ball processing grinding machine with the termination of pumping pressure-keeping mechanism |
-
2017
- 2017-04-28 CN CN201720465754.3U patent/CN206738267U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106907358A (en) * | 2017-04-28 | 2017-06-30 | 宁波奉化精瑞钢球有限公司 | Termination of pumping pressure-keeping mechanism and the steel ball processing grinding machine with the termination of pumping pressure-keeping mechanism |
| CN106907358B (en) * | 2017-04-28 | 2018-06-26 | 宁波奉化精瑞钢球有限公司 | Termination of pumping pressure-keeping mechanism and the steel ball processing grinding machine with the termination of pumping pressure-keeping mechanism |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20171212 Effective date of abandoning: 20180626 |
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| AV01 | Patent right actively abandoned |