CN210440310U - Miniature digital oil cylinder - Google Patents
Miniature digital oil cylinder Download PDFInfo
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- CN210440310U CN210440310U CN201920958073.XU CN201920958073U CN210440310U CN 210440310 U CN210440310 U CN 210440310U CN 201920958073 U CN201920958073 U CN 201920958073U CN 210440310 U CN210440310 U CN 210440310U
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- 238000007789 sealing Methods 0.000 claims abstract description 16
- 238000006073 displacement reaction Methods 0.000 claims description 12
- 230000033001 locomotion Effects 0.000 claims description 10
- 229910000831 Steel Inorganic materials 0.000 claims description 8
- 239000010959 steel Substances 0.000 claims description 8
- 230000008878 coupling Effects 0.000 abstract description 4
- 238000010168 coupling process Methods 0.000 abstract description 4
- 238000005859 coupling reaction Methods 0.000 abstract description 4
- 239000003921 oil Substances 0.000 description 98
- 238000000034 method Methods 0.000 description 6
- 230000008569 process Effects 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 5
- 230000005540 biological transmission Effects 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 230000005611 electricity Effects 0.000 description 3
- 239000012530 fluid Substances 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 239000010687 lubricating oil Substances 0.000 description 3
- 230000004044 response Effects 0.000 description 3
- 238000005265 energy consumption Methods 0.000 description 2
- 230000010354 integration Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
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Abstract
The utility model relates to a miniature digital oil cylinder, a valve sleeve for installing a rotary sealing ring is connected in a matching way in a cylinder body, a wave spring is arranged between the end surface of a circular groove at the rear part of a piston and the end surface of an inner hole of the valve sleeve, a connecting shaft at the rear end of the valve sleeve is connected with an output shaft of a motor through a shaft coupling, and the motor is fixedly connected with the cylinder body through a mounting seat; a piston is connected in the valve sleeve in a matching way, the front end of the piston is connected with the cylinder body through a cushion cover, the piston and the cushion cover move relatively, an oil return cavity and a pressure oil cavity are respectively formed between the piston and two ends of the valve sleeve, two spiral grooves and small holes are formed in the piston, one small hole is communicated with the oil return cavity T to serve as a T port of the piston, the other small hole is communicated with the pressure oil cavity P to serve as a P port of the piston, and the two spiral grooves are communicated with the P; the valve sleeve is provided with small holes, an oil return cavity communicated with one small hole is used as a valve sleeve T port, and the other small hole is communicated with a pressure oil cavity P cavity and used as a valve sleeve P port; the end surface of the cylinder body is provided with a pressure oil inlet which is communicated with the pressure oil cavity P through a piston port P.
Description
Technical Field
The utility model relates to a miniature pneumatic cylinder digital control component, especially a miniature digital cylinder.
Background
The traditional hydraulic slide valve core control adopts an electromagnet or a torque motor to control the displacement of the valve core, the force or torque precision output by the electromagnet or the torque motor is poor (about 10 percent), the high-precision control needs to be corrected through feedback (position electric feedback LVDT or spring feedback), in addition, the output power of the electromagnet or the torque motor is very small, the large-flow valve core cannot be directly driven, the problem can be solved only through multi-stage control, and the energy consumption is high. Especially, the displacement of the oil pump is controlled by utilizing a complex structure of a spring and a valve, so that the control purpose is achieved, the energy consumption is higher, the precision is worse, the adjustment is difficult, and the precise control purpose cannot be achieved. As is well known, the electrical control technology has advanced far faster than mechanical hydraulic control technology in recent years, and the electrical control technology has to be applied to hydraulic technology to really realize that energy transmission (transmission) is completed by hydraulic pressure and control is completely completed by electricity; if not, the field of application of hydraulic transmissions is further compressed by electric transmissions to a large extent (this situation has become more severe in recent years, e.g. electric cylinders, etc.).
Based on the digital control technology of the existing oil cylinder, a new oil cylinder structure needs to be designed, the stepping (or servo) control of a motor is utilized, and the micro signal output of the motor drives an oil cylinder piston to generate micro linear displacement, so that the miniaturization of the digital oil cylinder is realized.
Disclosure of Invention
The utility model aims to provide a miniature digital oil cylinder, this oil cylinder can realize the integrated control of electricity liquid, mainly utilize step-by-step (or servo) control of motor, the corner and the rotational speed of motor can all realize small digital signal output, drive the valve barrel through the motor output shaft and rotate, put through the high-pressure oil circuit, the high-pressure oil circuit gets into two chambeies of piston and produces the pressure differential, thereby promote the piston to carry out reciprocating linear motion; the digital signal output by the motor and the slight linear motion distance (position) of the oil cylinder piston form a certain proportional relation, and finally, the digital displacement output of the oil cylinder piston is realized; in practical application, the control function of the electromagnet and the force motor can be replaced, and the output precision and the output power are higher than those of the electromagnet and the force motor.
In order to achieve the above purpose, the technical scheme of the utility model is that: a miniature digital oil cylinder comprises a motor, a cylinder body, a valve sleeve and a piston, wherein the valve sleeve and the valve sleeve which are matched, connected and provided with a rotary sealing ring in the cylinder body are axially and fixedly connected with the cylinder body through a clamping ring, a connecting shaft at the rear end of the valve sleeve is connected with an output shaft of the motor through a coupling, and the motor is fixedly connected with the cylinder body through a mounting seat; the mounting seat is fixed with the motor through a mounting plate; the valve sleeve is internally and cooperatively connected with a piston, a wave spring is arranged between the end surface of a circular groove at the rear part of the piston and the end surface of an inner hole of the valve sleeve, the front end of the piston is connected with a cylinder body through a cushion cover, the piston and the cushion cover move relatively, a plurality of steel balls are arranged between the piston and the cushion cover, an oil return cavity and a pressure oil cavity are respectively formed between the piston and the two ends of the valve sleeve, the piston is provided with two spiral grooves and small holes, one small hole is communicated with the oil return cavity T as a T port of the piston, the other small hole is communicated with the pressure oil cavity P as a P; the valve sleeve is provided with small holes, one small hole is communicated with the oil return cavity to serve as a valve sleeve T port, and the other small hole is communicated with the pressure oil cavity P cavity to serve as a valve sleeve P port; the end face of the cylinder body is provided with a pressure oil inlet which is communicated with the pressure oil cavity P through a piston port P.
Further, the motor is a stepping motor or a servo motor with a driver.
Furthermore, the micro digital oil cylinder is connected with a controlled element through a screw, digital quantity output of linear motion of the piston is controlled through digital quantity output of the rotation angle and the rotation speed of the motor, and the piston pushes the controlled element to realize digital displacement movement.
Further, when the micro digital oil cylinder does not work, pressure oil enters the pressure oil cavity of the valve sleeve from the pressure oil output port of the controlled element, the port P of the valve sleeve and the port T of the valve sleeve are respectively tangent to the spiral groove of the piston, the pressure oil enters the spiral groove and then is divided into two paths, one path enters the oil return cavity T through the spiral groove and the port T of the valve sleeve, the other path enters the pressure oil cavity P through the port P of the piston, the pressure of the pressure oil cavity P is half of the pressure of oil inlet, and the pressure of the valve core of the controlled element is equal to the pressure of the pressure oil cavity.
Further, when the micro digital oil cylinder works, the motor rotates by an angle according to instructions, the motor drives the piston to rotate by the same rotating angle, pressure oil enters the piston spiral groove, oil at the opening of the piston P completely enters the pressure oil cavity P, the opening of the valve sleeve T is not communicated with the spiral groove at the moment, an oil return opening is closed, and the pressure of the pressure oil cavity P pushes the piston and a valve core of a controlled element to move; after the piston moves, the spiral groove of the piston moves to a position tangent to the opening of the valve sleeve P, T, the pressure at the two ends of the piston is movably balanced again, and the piston stops moving.
Further, when the motor rotates reversely, the pressure oil port is closed, the pressure oil cavity P is communicated with the oil return cavity T through the spiral groove, the pressure of the valve core of the controlled element is larger than the pressure of the pressure oil cavity P, the valve core pushes the piston to move, when the spiral groove of the piston moves to a position tangent to the opening of the valve sleeve P, T, the pressures at two ends of the piston are movably balanced again, and the piston stops moving.
The utility model has the advantages that:
the utility model discloses combine the electricity liquid integration control and mechanical structure organic together, make full use of is automatically controlled, hydraulic pressure, mechanical structure's advantage to digital cylinder control function is realized to lower cost.
The high-precision digital signal is output by controlling the stepping (or servo) motor, and the dynamic response time of the oil cylinder piston is controlled by controlling the relation between the rotating speed of the motor and the working stroke of the piston, so that the working frequency of the piston is controlled, and the quick response of the oil cylinder piston is realized. Meanwhile, motor control signals can be controlled in a closed loop mode through a PLC (programmable logic controller), and are combined with other control requirements of the system, so that artificial intelligent control is comprehensively realized.
By utilizing the working principle of hydraulic fluid mechanics tangential throttling edge and the relation between the flow rate of hydraulic fluid and pressure and the relation between pressure and area, the pressure difference at two ends of the piston is generated by controlling the area difference at two ends of the piston, so that the reciprocating motion of the piston is realized.
By utilizing the working principle and characteristics of a spiral line, the digital signal output by the motor and the displacement value of the piston are mutually corresponding under the full working stroke of the piston by controlling the initial position, the groove width and the thread pitch of the piston spiral groove and the mutual relation among the initial angle, the full-overlapping rotation angle and the full-overlapping axial displacement of the valve sleeve small hole and the piston spiral groove through careful calculation, so that the digital displacement output of the oil cylinder piston is realized.
To sum up, the utility model discloses a miniature digital cylinder adopts brand-new design theory, and hydro-cylinder overall structure is compact, control is convenient, the cost is lower, and application scope is wide, the installation and debugging of being convenient for, and make full use of mechatronics liquid integration advantage has realized the miniaturization and the digital output of hydro-cylinder, and simultaneous control precision and output displacement precision are higher, and dynamic response is fast, and the motion is steady reliable, has very strong novelty, practicality, obtains good effect in practical application.
Drawings
FIG. 1 is a front view of the micro digital cylinder of the present invention;
FIG. 2 is a left side view of the micro digital cylinder (with the guard plate removed);
FIG. 3 is a schematic view of the valve housing construction;
wherein: (a) a main sectional view, (b) a sectional view from a1-a1, (c) a sectional view from a2-a2, (d) a sectional view from A3-A3;
FIG. 4 is a schematic view of the piston structure;
wherein: (a) front view, (B) sectional view a-a, (c) top view, (d) sectional view B1-B1, (e) sectional view B2-B2, and (f) sectional view.
Detailed Description
The present invention will be further explained with reference to the accompanying drawings and examples.
As shown in fig. 1 and 2, the utility model discloses a miniature digital cylinder, including step-by-step (or servo) motor 1 (containing the driver), mount pad 2, mounting panel 3, screw 4, shaft coupling 5, cylinder body 6, valve barrel 7, piston 8, cushion cover 9, sealing washer 10, sealing washer 11, screw 12, steel ball 13, plug screw 14, holding screw 15, opposite vertex wave spring 16, rotatory sealing washer 17, snap ring 18, guard plate 19, nut 20.
The valve sleeve 7 is arranged in the cylinder body 6, the rotary sealing ring 17 is arranged in the sealing groove of the valve sleeve 7, the snap ring 18 is clamped in the snap ring groove at the rear end of the valve sleeve 7 and is fixedly connected with the cylinder body 6 in the axial direction, the connecting shaft at the rear end of the valve sleeve 7 is connected with the output shaft of the stepping (or servo) motor 1 through the shaft coupling 5, and the stepping (or servo) motor 1 is fixedly connected on the mounting seat 2 through the mounting plate 3 and is connected with the cylinder body 6 through the mounting seat 2. The valve sleeve 7 is internally connected with a piston 8 in a matching manner, a butting wave spring 16 is arranged between the end face of a circular groove at the rear part of the piston 8 and the end face of an inner hole of the valve sleeve 7, the front end of the piston 8 is connected with the cylinder body 6 through a cushion cover 9, the piston 8 and the cushion cover 9 move relatively, a plurality of steel balls 13 are arranged between the piston 8 and the cushion cover 9, a T cavity (oil return cavity) and a P cavity (pressure oil cavity) are respectively arranged between the two ends of the piston 8 and the valve sleeve 7, two spiral grooves and small holes are formed in the piston 8, one hole is communicated with the T cavity (oil return cavity) of the digital oil cylinder, the other hole is communicated with the P cavity (pressure oil cavity) of the digital oil cylinder, the small hole is formed in the valve sleeve 7.
The micro digital oil cylinder is used as a control part, digital quantity output of linear motion of a piston is controlled through digital quantity output of the rotation angle and the rotation speed of a motor, and finally the piston pushes a controlled element to realize digital displacement movement.
The protection plate 19 and the nut 20 only play a protection role in the process of transportation and storage, and are removed in practical use.
When the micro digital oil cylinder controls other elements to be used, the digital oil cylinder and the controlled element are connected and fixed into a whole by the screw 12, oil inlet and return of the digital oil cylinder are provided by the controlled element, and the sealing rings 10 and 11 ensure reliable sealing between the digital oil cylinder and the controlled element to prevent oil leakage.
The end face of the cylinder body 6 is provided with 2 pressure oil inlets P (shown in figure 2), one pressure oil inlet P is normally used, the other pressure oil inlet P is plugged, and the purpose of opening the two pressure oil inlets is to ensure that the miniature digital oil cylinder has stronger universality.
The valve sleeve 7 is provided with small holes, one hole is communicated with a T cavity (oil return cavity) of the digital oil cylinder and called as a T port, and the other hole is communicated with a P cavity (pressure oil cavity) of the digital oil cylinder and called as a P port. The schematic view of the valve sleeve structure is shown in fig. 3 a-d.
The piston 8 is provided with a spiral groove and a small hole, one hole is communicated with a T cavity (an oil return cavity) of the digital oil cylinder, namely a T port, the other hole is communicated with a P cavity (a pressure oil cavity) of the digital oil cylinder, namely a P port, and the two spiral grooves are communicated with the P port. The piston is schematically shown in figures 4 a-f.
The utility model discloses a concrete implementation process: see FIG. 1
(1) Connection assembly for stepping (or servo) motor
The mounting seat 2 is arranged on the stepping (or servo) motor 1, the mounting seat 2 is pressed on the end surface of the stepping (or servo) motor 1 by the mounting plate 3 and is fixed by the screw 4.
(2) Valve sleeve and cylinder body connecting assembly
The rotary sealing ring 17 is arranged in the sealing groove of the valve sleeve 7, and lubricating oil is coated on the inner hole of the cylinder body 6, so that the valve sleeve 7 and the rotary sealing ring 17 are prevented from being damaged in the assembling process.
Then the valve sleeve 7 is arranged in the cylinder body 6, and finally the snap ring 18 is clamped in the open ring groove of the valve sleeve 7, so that the valve sleeve 7 is rotated, the valve sleeve is ensured to rotate easily and freely, and no clamping stagnation phenomenon exists.
(3) Connection of motor and cylinder
The coupler 5 is arranged on the valve sleeve 7, the output shaft of the motor is aligned with the slot of the coupler, the stepping (or servo) motor 1 and the mounting seat 2 are screwed into the cylinder body 6 together, the valve sleeve 7 and the stepping (or servo) motor 1 can rotate together in the process of screwing, the rotating angles are the same, and after the output shaft of the stepping (or servo) motor 1 enters the slot of the coupler 5, the stepping (or servo) motor 1 can only be rotated until the mounting seat 2 is screwed into the cylinder body 6 completely.
(4) Piston mounting
1) Firstly, the opposite-vertex wave spring 16 is loaded into the spring cavity of the valve sleeve 7, the outer circle of the piston 8 is coated with lubricating oil, and then the piston 8 is loaded into the valve sleeve 7.
2) The inner and outer circles of the cushion cover 9 are coated with lubricating oil, the valve sleeve 9 is installed in the cylinder body 6, and the valve sleeve 9 is rotated to align the small holes on the outer circle with the holes on the cylinder body.
3) The steel ball 13 is arranged in the small hole, then the steel ball 13 is transferred into the groove, the steel ball 13 is continuously transferred into the groove until the steel ball 13 is completely filled in the groove, finally the set screw 15 is screwed in, and the piston 8 is rotated (or moved back and forth), so that the piston 8 is ensured to rotate and move back and forth easily and freely without clamping stagnation.
(5) Accessory assembly
The screw plug 14 (with a sealing ring) is arranged on the process hole of the cylinder body 6 to ensure that oil is not leaked.
The sealing rings 10, 11 are fitted into the sealing grooves of the cylinder 6.
The protective plate 19 is covered on the end surface of the cylinder 6 and fixed by the screw 12 and the nut 20.
The utility model discloses a working process (principle):
when the digital oil cylinder is used, the outer end face of the piston of the oil cylinder is in contact with the end face of the valve core of the controlled element, when the piston moves, the valve core can be pushed to move, and otherwise, the valve core can also push the piston to move.
When the digital oil cylinder does not work, pressure oil enters a valve body P port from a controlled element through a cylinder body oil cylinder P port, the valve body P port is communicated with a valve sleeve P port, the P port and a T port of the valve sleeve are respectively tangent with a spiral groove of a piston at the moment, the pressure oil enters the spiral groove and then is divided into two paths, one path enters an oil return cavity through the spiral groove and the valve sleeve T port, the other path enters a pressure cavity of the oil cylinder through the piston P port, and the pressure of the oil cylinder P cavity is half of the pressure of oil inlet according to the fluid mechanics tangent throttling edge principle. At the moment, the valve core pressure of the controlled element is equal to the pressure of the P cavity of the oil cylinder (ensured by piston design), and the piston does not move.
When the digital oil cylinder works, a motor receives a command to rotate by an angle, the motor drives the piston to rotate by the same rotating angle, pressure oil sequentially passes through a cylinder body P port and a valve sleeve P port, a piston spiral groove and a piston P port oil duct all enter a P cavity of the oil cylinder, at the moment, the valve sleeve T port is not communicated with the spiral groove, an oil return port is closed, the pressure of the oil cylinder P cavity is doubled compared with the original pressure, the balance force at two ends of the piston is broken, the piston is pushed, and the piston pushes the valve core to move. After the piston moves, the spiral groove of the piston moves to a position tangent to the opening of the valve sleeve P, T, the pressure at the two ends of the piston is movably balanced again, and the piston stops moving.
When the motor rotates reversely, the pressure oil port is closed, oil in the P cavity of the oil cylinder is communicated with the T cavity through the spiral groove, the pressure of the valve core of the controlled element is larger than the pressure of the P cavity of the oil cylinder, the valve core pushes the piston to move towards the direction, when the spiral groove of the piston moves to the position tangent to the opening of the valve sleeve P, T, the pressures at the two ends of the piston are movably balanced again, and the piston stops moving.
The small hole position and the initial angle at the P, T port on the valve sleeve 7, the position of the P, T port on the piston 8, the position of the spiral groove, the groove width, the thread pitch and the initial position of the spiral groove are obtained through detailed calculation and experimental verification, and the key points are that the pressure change is generated in the P cavity of the oil cylinder, the piston is pushed to move, and the moving displacement of the piston is ensured to be matched with a digital signal output by a motor.
The structure is an end face oil inlet structure, the plate type connecting structure for feeding oil from the bottom face can be changed by changing the position of the 6 oil ports of the cylinder body, or the appearance, the position of the oil ports and the connecting size of the cylinder body are changed according to other connecting requirements, so that the connecting requirements of various working conditions can be met.
Claims (6)
1. The utility model provides a miniature digital cylinder, includes motor, cylinder body, valve barrel, piston, its characterized in that: the valve sleeve is matched and connected with the cylinder body and provided with a rotary sealing ring, the valve sleeve is axially and fixedly connected with the cylinder body through a clamping ring, a connecting shaft at the rear end of the valve sleeve is connected with an output shaft of a motor through a coupler, and the motor is fixedly connected with the cylinder body through a mounting seat; the mounting seat is fixed with the motor through a mounting plate; the valve sleeve is internally and cooperatively connected with a piston, a wave spring is arranged between the end surface of a circular groove at the rear part of the piston and the end surface of an inner hole of the valve sleeve, the front end of the piston is connected with a cylinder body through a cushion cover, the piston and the cushion cover move relatively, a plurality of steel balls are arranged between the piston and the cushion cover, an oil return cavity and a pressure oil cavity are respectively formed between the piston and the two ends of the valve sleeve, the piston is provided with two spiral grooves and small holes, one small hole is communicated with the oil return cavity T as a T port of the piston, the other small hole is communicated with the pressure oil cavity P as a P; the valve sleeve is provided with small holes, one small hole is communicated with the oil return cavity to serve as a valve sleeve T port, and the other small hole is communicated with the pressure oil cavity P cavity to serve as a valve sleeve P port; the end face of the cylinder body is provided with a pressure oil inlet which is communicated with the pressure oil cavity P through a piston port P.
2. The miniature digital cylinder of claim 1, wherein: the motor is a stepping motor or a servo motor with a driver.
3. The miniature digital cylinder of claim 1, wherein: the micro digital oil cylinder is connected with a controlled element through a screw, digital quantity output of linear motion of the piston is controlled through digital quantity output of the rotation angle and the rotation speed of the motor, and the piston pushes the controlled element to realize digital displacement movement.
4. The micro digital cylinder according to claim 3, wherein: when the micro digital oil cylinder does not work, pressure oil enters a pressure oil cavity of the valve sleeve from a pressure oil output port of the controlled element, a valve sleeve P port and a valve sleeve T port are respectively tangent with a spiral groove of the piston, the pressure oil enters the spiral groove and then is divided into two paths, one path enters an oil return cavity T through the spiral groove and the valve sleeve T port, the other path enters the pressure oil cavity P through the piston P port, the pressure of the pressure oil cavity P is half of the pressure of oil inlet, and the pressure of a valve core of the controlled element is equal to the pressure of the pressure oil cavity P, so that the piston does.
5. The micro digital cylinder according to claim 3, wherein: when the micro digital oil cylinder works, the motor rotates by an angle according to a command, the motor drives the piston to rotate by the same rotating angle, pressure oil enters the piston spiral groove, oil at the opening P of the piston completely enters the pressure oil cavity P, the opening T of the valve sleeve is not communicated with the spiral groove at the moment, the oil return opening is closed, and the pressure of the pressure oil cavity P pushes the piston and the valve core of the controlled element to move; after the piston moves, the spiral groove of the piston moves to a position tangent to the opening of the valve sleeve P, T, the pressure at the two ends of the piston is movably balanced again, and the piston stops moving.
6. The micro digital cylinder according to claim 3, wherein: when the motor rotates reversely, the pressure oil port is closed, the pressure oil cavity P is communicated with the oil return cavity T through the spiral groove, the pressure of the valve core of the controlled element is larger than the pressure of the pressure oil cavity P, the valve core pushes the piston to move, when the spiral groove of the piston moves to a position tangent to the opening of the valve sleeve P, T, the pressures at two ends of the piston are movably balanced again, and the piston stops moving.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920958073.XU CN210440310U (en) | 2019-06-24 | 2019-06-24 | Miniature digital oil cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920958073.XU CN210440310U (en) | 2019-06-24 | 2019-06-24 | Miniature digital oil cylinder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210440310U true CN210440310U (en) | 2020-05-01 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920958073.XU Withdrawn - After Issue CN210440310U (en) | 2019-06-24 | 2019-06-24 | Miniature digital oil cylinder |
Country Status (1)
| Country | Link |
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| CN (1) | CN210440310U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110230621A (en) * | 2019-06-24 | 2019-09-13 | 上海衡拓液压控制技术有限公司 | Minitype digital oil cylinder |
| CN113819108A (en) * | 2021-09-29 | 2021-12-21 | 辽宁工程技术大学 | Digital spiral swing fluid cylinder |
-
2019
- 2019-06-24 CN CN201920958073.XU patent/CN210440310U/en not_active Withdrawn - After Issue
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110230621A (en) * | 2019-06-24 | 2019-09-13 | 上海衡拓液压控制技术有限公司 | Minitype digital oil cylinder |
| CN110230621B (en) * | 2019-06-24 | 2024-05-07 | 上海衡拓液压控制技术有限公司 | Miniature digital oil cylinder |
| CN113819108A (en) * | 2021-09-29 | 2021-12-21 | 辽宁工程技术大学 | Digital spiral swing fluid cylinder |
| CN113819108B (en) * | 2021-09-29 | 2023-07-14 | 辽宁工程技术大学 | Digital spiral swing fluid cylinder |
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| GR01 | Patent grant | ||
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| AV01 | Patent right actively abandoned | ||
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Granted publication date: 20200501 Effective date of abandoning: 20240507 |
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| AV01 | Patent right actively abandoned |
Granted publication date: 20200501 Effective date of abandoning: 20240507 |