CN112324739A - Hydraulic robot synchronous servo control hydraulic cylinder - Google Patents
Hydraulic robot synchronous servo control hydraulic cylinder Download PDFInfo
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- CN112324739A CN112324739A CN202011294903.7A CN202011294903A CN112324739A CN 112324739 A CN112324739 A CN 112324739A CN 202011294903 A CN202011294903 A CN 202011294903A CN 112324739 A CN112324739 A CN 112324739A
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- cylinder body
- hydraulic
- cylinder
- wall
- oil pipe
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/08—Characterised by the construction of the motor unit
- F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
- F15B15/1423—Component parts; Constructional details
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/08—Characterised by the construction of the motor unit
- F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
- F15B15/1423—Component parts; Constructional details
- F15B15/1428—Cylinders
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/08—Characterised by the construction of the motor unit
- F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
- F15B15/1423—Component parts; Constructional details
- F15B15/1447—Pistons; Piston to piston rod assemblies
- F15B15/1452—Piston sealings
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/08—Characterised by the construction of the motor unit
- F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
- F15B15/1423—Component parts; Constructional details
- F15B15/1471—Guiding means other than in the end cap
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/08—Characterised by the construction of the motor unit
- F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
- F15B15/1423—Component parts; Constructional details
- F15B15/1485—Special measures for cooling or heating
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2215/00—Fluid-actuated devices for displacing a member from one position to another
- F15B2215/30—Constructional details thereof
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Actuator (AREA)
Abstract
The invention relates to a synchronous servo control hydraulic cylinder of a hydraulic robot, which comprises a cylinder body, wherein a guide sleeve is arranged in one end of the cylinder body, a rear end cover is arranged in the other end of the cylinder body, a piston and a piston rod are arranged in the cylinder body, the piston is embedded on the piston rod, a valve block is arranged on the cylinder body, two ends of the valve block are respectively connected into the cylinder body through a first oil pipe and a second oil pipe, two hydraulic control one-way valves respectively connected with the first oil pipe and the second oil pipe are arranged on the valve block, a cylinder body bulge is arranged at one end part of the cylinder body provided with the guide sleeve, and. The sealing performance of the rod body is enhanced through the matching of the sealing elements, the consistency of the volume of the oil cavity of each hydraulic cylinder is ensured, the oil supply synchronization of each hydraulic cylinder is ensured, the displacement precision of each hydraulic cylinder is improved, and the precise production is realized; through the setting of upper and lower heat conduction post and cooling portion, improve the heat dispersion of pneumatic cylinder, the life of extension pneumatic cylinder.
Description
Technical Field
The invention relates to a hydraulic cylinder, in particular to a hydraulic robot synchronous servo control hydraulic cylinder.
Background
The hydraulic cylinder is a hydraulic actuator which converts hydraulic energy into mechanical energy and performs linear reciprocating motion (or swinging motion). It has simple structure and reliable operation. When it is used to implement reciprocating motion, it can omit speed-reducing device, and has no transmission gap, and its motion is stable, so that it can be extensively used in various mechanical hydraulic systems. When some workpieces are machined, a plurality of hydraulic cylinders are required to act simultaneously to finish the machining, so that high requirements are provided for the action consistency of the hydraulic cylinders, but the existing hydraulic cylinders cannot synchronously act due to the problems of machining precision and sealing property.
Disclosure of Invention
The present invention is directed to solving, at least to some extent, one of the technical problems in the related art. Therefore, the invention provides a hydraulic robot synchronous servo control hydraulic cylinder.
The technical scheme adopted by the invention for solving the technical problems is as follows: the utility model provides a synchronous servo control pneumatic cylinder of hydraulic robot, includes the cylinder body, be equipped with the uide bushing in the one end of cylinder body, be equipped with the rear end cap in the other end, be equipped with piston and piston rod in the cylinder body, the setting is inlayed on the piston rod to the piston, be equipped with the valve block on the cylinder body, the valve block both ends are connected to in the cylinder body through first oil pipe and second oil pipe respectively, be equipped with two hydraulic control check valves of being connected with first oil pipe and second oil pipe respectively on the valve block, it is protruding to be equipped with the cylinder body on the cylinder body one end tip that is equipped with the uide bushing, the cylinder.
In one embodiment of the invention, the cylinder boss is semi-circular.
In one embodiment of the invention, an earring is arranged at one end of the cylinder body provided with the guide sleeve, a self-lubricating joint bearing is arranged at one end of the cylinder body provided with the rear end cover, a dustproof ring, an O-shaped sealing ring, a shaft ring, a stet seal and a shaft guide ring are sequentially arranged between the rod body and the inner wall of the guide sleeve from one end provided with the earring to one end provided with the self-lubricating joint bearing, the O-shaped sealing ring and an O-shaped sealing ring check ring are arranged between the guide sleeve and the inner wall of the rod body, and a combined sealing ring is arranged between the piston and the inner.
In one embodiment of the invention, the first oil pipe and the second oil pipe are respectively connected into the cylinder body through welded hinged pipe joints, and the first oil pipe and the second oil pipe are also connected with the valve block through welded end straight-through pipe joints; and a combined sealing ring is arranged between the welding type hinged pipe joint and the cylinder body, and a combined sealing ring is also arranged between the welding type end straight-through pipe joint and the valve block.
In one embodiment of the invention, two ends of the cylinder body are respectively provided with a sensor fixing seat.
In one embodiment of the present invention, an upper heat-conducting pillar and a lower heat-conducting pillar are disposed between an inner wall and an outer wall of the cylinder body, and the upper heat-conducting pillar and the lower heat-conducting pillar extend out of the outer wall, respectively, the upper heat-conducting pillar being located at an upper portion of the cylinder body, and the lower heat-conducting pillar being located at a lower portion of the cylinder body.
In one embodiment of the invention, a cooling part is fixedly arranged between the upper heat-conducting column and the lower heat-conducting column which extend out of the outer wall, the cooling part comprises a heat-conducting plate and a cooling cavity which are mutually connected, cooling liquid is arranged in the cooling cavity, one side of the heat-conducting plate is a curved surface matched with the outer wall of the cylinder body, and the heat-conducting plate is provided with a plurality of cooling bulges which extend out towards the direction of the cooling cavity.
In one embodiment of the invention, a plurality of connecting columns are sequentially arranged between the inner wall and the outer wall of the cylinder body from top to bottom, the connecting columns are matched with the cooling bulges, and the connecting columns are made of copper.
In one embodiment of the present invention, the cooling protrusions are semicircular, and a space is left between adjacent cooling protrusions.
In an embodiment of the invention, the connecting column is composed of a first vertical rod, a first cross rod and a second vertical rod, the first vertical rod and the second vertical rod are both vertically arranged, two ends of the first cross rod are respectively and transversely connected with the first vertical rod and the second vertical rod, one end of the first vertical rod is connected with the heat conducting plate, and one end of the second vertical rod is connected with the inner wall of the cylinder body.
The invention has the beneficial effects that: the hydraulic cylinder has good sealing performance, the sealing performance of the rod body is enhanced through the matching of the sealing elements, the consistency of the volumes of the oil cavities of the hydraulic cylinders is ensured, the oil supply synchronization of the hydraulic cylinders is ensured, the displacement precision of the hydraulic cylinders is improved, and the precise production is realized; through the setting of upper and lower heat conduction post and cooling portion, improve the heat dispersion of pneumatic cylinder, the life of extension pneumatic cylinder.
Drawings
FIG. 1 is a first schematic structural diagram of an embodiment of the present invention;
FIG. 2 is a second structural schematic diagram according to an embodiment of the present invention;
FIG. 3 is a third structural schematic diagram of an embodiment of the present invention;
FIG. 4 is an enlarged view of the structure at A in FIG. 3;
FIG. 5 is a schematic structural diagram of a second embodiment of the present invention;
FIG. 6 is a schematic view of a cooling protrusion structure according to a second embodiment of the present invention;
FIG. 7 is a schematic view of a connecting column structure according to a second embodiment of the present invention;
FIG. 8 is a schematic diagram of a third structure according to an embodiment of the present invention.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
Example 1:
as shown in fig. 1 to 4, a hydraulic robot synchronous servo control hydraulic cylinder comprises a cylinder body 1, a guide sleeve 2 is arranged in one end of the cylinder body 1, a rear end cover 3 is arranged in the other end of the cylinder body 1, a piston 4 and a piston rod 5 are arranged in the cylinder body 1, the piston 4 is embedded and arranged on the piston rod 5, a valve block 6 is arranged on the cylinder body 1, two ends of the valve block 6 are respectively connected into the cylinder body 1 through a first oil pipe 7 and a second oil pipe 8, two hydraulic control one-way valves 601 respectively connected with the first oil pipe 7 and the second oil pipe 8 are arranged on the valve block 6, a cylinder body bulge 101 is arranged on one end of the cylinder body 1 provided with the guide sleeve 2, the cylinder body bulge 101 is matched with a groove edge of the guide sleeve 2, the cylinder body bulge 101 is in a semicircular shape, damage of the cylinder body to the guide sleeve is.
The piston is embedded on the piston rod, so that the integrity of the piston and the piston rod is enhanced, the gap between the piston and the piston rod is reduced, and the accuracy of the piston rod driving the piston to move is increased; through the matching of the cylinder body bulge 101 and the guide sleeve 2, the sealing performance inside the cylinder body is further enhanced, the volume identity of an oil cavity is ensured, the displacement of a piston rod is ensured, the working accuracy of the hydraulic cylinder is ensured, and the accurate production of the hydraulic cylinder is facilitated.
1 one end department of cylinder body with uide bushing 2 is equipped with earrings 9, is equipped with rear end cap 3 1 one end of cylinder body is equipped with self-lubricating joint bearing 10, is equipped with dust ring 11, O type sealing washer 12, axle ring 13, stet 14 and axle ring 15 from being equipped with earrings 9 one end to being equipped with self-lubricating joint bearing 10 one end in proper order between body of rod 1 and uide bushing 2 inner wall, is equipped with O type sealing washer 12 and O type sealing washer retaining ring between uide bushing 2 and body of rod 1 inner wall, is equipped with combined seal 16 between piston 4 and 1 inner wall of cylinder body.
The first oil pipe 7 and the second oil pipe 8 are respectively connected into the cylinder body 1 through a welded hinged pipe joint 17, and the first oil pipe 7 and the second oil pipe 8 are also connected with the valve block 6 through a welded end straight-through pipe joint 18; a combined sealing ring is arranged between the welding type hinged pipe joint 17 and the cylinder body, and a combined sealing ring is also arranged between the welding type end straight-through pipe joint 18 and the valve block 6. Two tip of cylinder body 1 are equipped with sensor fixing base 19 respectively, make things convenient for fixed sensor, the more accurate displacement of the pneumatic cylinder of being convenient for.
Through each sealing washer, strengthen the inside leakproofness of the body of rod, guarantee that the volume of the oil pocket of a plurality of pneumatic cylinders of simultaneous operation is unanimous, improve the precision of a plurality of pneumatic cylinders synchronization action, be convenient for the automation and the accurate processing of product.
Example 2:
as shown in fig. 5 to 7, an upper heat conducting column 20 and a lower heat conducting column 21 are arranged between the inner wall and the outer wall of the cylinder body 1, the upper heat conducting column 20 and the lower heat conducting column 21 respectively extend out of the outer wall, the upper heat conducting column 20 is located at the upper part of the cylinder body 1, the lower heat conducting column 21 is located at the lower part of the cylinder body 1, heat generated by reciprocating motion of a piston rod inside the hydraulic cylinder is dissipated through the upper heat conducting column and the lower heat conducting column, heat dissipation performance of the hydraulic cylinder is improved, stability of normal operation of the hydraulic cylinder is guaranteed, and service life of the hydraulic cylinder.
A cooling part is fixedly arranged between the upper heat conduction column 20 and the lower heat conduction column 21 which extend out of the outer wall, the cooling part comprises a heat conduction plate 22 and a cooling cavity 23 which are mutually connected, cooling liquid is arranged in the cooling cavity 23, one side of the heat conduction plate 22 is a curved surface matched with the outer wall of the cylinder body, and a plurality of cooling bulges 24 which extend out towards the direction of the cooling cavity are arranged on the heat conduction plate 22; the upper heat-conducting column and the lower heat-conducting column play a role in fixing the cooling part, heat generated by reciprocating motion of the piston rod in the cylinder body 1 is led out to the heat-conducting plate and then further conducted to the cooling protrusion, and heat dissipation is realized through the cooling protrusion; in order to improve the heat dissipation effect, the cooling protrusions 24 are semicircular, the semicircular cooling protrusions increase the heat dissipation angle and the heat dissipation area, heat can be radiated and dissipated, and heat dissipation intervals are reserved between every two adjacent cooling protrusions 24.
Be equipped with between the inner wall of cylinder body 1 and the outer wall from the top down and be equipped with a plurality of spliced poles 25 in proper order, spliced pole 25 matches the setting with cooling arch 24, and spliced pole 25 adopts copper to make, derives the heat on the cylinder body inner wall to the outer wall through the spliced pole on, improves heat conduction efficiency.
Example 3:
as shown in fig. 8, the connecting column 25 is composed of a first vertical rod 2501, a first cross rod 2503 and a second vertical rod 2502, the first vertical rod 2501 and the second vertical rod 2502 are both vertically disposed, two ends of the first cross rod 2503 are respectively and transversely connected with the first vertical rod 2501 and the second vertical rod 2502, preferably, two ends of the first cross rod 2503 are respectively connected with the central positions of the first vertical rod and the second vertical rod, so as to increase the stability of the connecting column, one end of the first vertical rod 2501 is connected with the heat conducting plate 22, one end of the second vertical rod 2502 is connected with the inner wall of the cylinder body 1, so that the first vertical rod 2501 is in direct contact with the heat conducting plate 22, the second vertical rod 2502 is in direct contact with the inner wall of the cylinder body 1, and the vertically disposed first vertical rod 2501 maximally increases the heat conducting area with the heat conducting plate, the second vertical rod 2502 maximally increases the heat conducting area with the inner wall of the cylinder body 1, thereby, the temperature in the cylinder body is reduced to the maximum extent, and the service life of the hydraulic cylinder is prolonged.
In the description herein, references to the description of the terms "one embodiment," "certain embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
In summary, although the present invention has been described with reference to the preferred embodiments, the above-described preferred embodiments are not intended to limit the present invention, and those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, therefore, the scope of the present invention shall be determined by the appended claims.
Claims (10)
1. The utility model provides a synchronous servo control pneumatic cylinder of hydraulic robot, its characterized in that, includes the cylinder body, be equipped with the uide bushing in the one end of cylinder body, be equipped with the rear end cap in the other end, be equipped with piston and piston rod in the cylinder body, the setting is inlayed on the piston rod to the piston, be equipped with the valve block on the cylinder body, the valve block both ends are connected to in the cylinder body through first oil pipe and second oil pipe respectively, be equipped with two hydraulic control check valves of being connected with first oil pipe and second oil pipe respectively on the valve block, be equipped with the cylinder body arch on the cylinder body one end tip that is equipped with the uide bushing, the cylinder body arch.
2. The hydraulic robot synchronous servo control hydraulic cylinder of claim 1, wherein the cylinder body protrusion is semi-circular ring shaped.
3. The hydraulic cylinder for synchronous servo control of a hydraulic robot as claimed in claim 1, wherein an ear ring is provided at one end of a cylinder body provided with a guide sleeve, a self-lubricating joint bearing is provided at one end of the cylinder body provided with a rear end cap, a dust ring, an O-ring, an axial ring, a stet seal and an axial guide ring are provided in this order from the end provided with the ear ring to the end provided with the self-lubricating joint bearing between the rod body and the inner wall of the guide sleeve, an O-ring and an O-ring retainer ring are provided between the guide sleeve and the inner wall of the rod body, and a composite seal ring is provided between the piston and the inner wall of the.
4. The hydraulic robot synchronous servo control hydraulic cylinder according to claim 1 or 2, wherein the first oil pipe and the second oil pipe are respectively connected into the cylinder body through welded hinged pipe joints, and the first oil pipe and the second oil pipe are further connected with the valve block through welded end straight-through pipe joints; and a combined sealing ring is arranged between the welding type hinged pipe joint and the cylinder body, and a combined sealing ring is also arranged between the welding type end straight-through pipe joint and the valve block.
5. The hydraulic robot synchronous servo control hydraulic cylinder according to claim 3, wherein two ends of the cylinder body are respectively provided with a sensor fixing seat.
6. The hydraulic cylinder as claimed in claim 1, wherein an upper heat transfer column and a lower heat transfer column are provided between an inner wall and an outer wall of the cylinder body, and the upper heat transfer column and the lower heat transfer column extend from the outer wall, respectively, the upper heat transfer column being located at an upper portion of the cylinder body, and the lower heat transfer column being located at a lower portion of the cylinder body.
7. The hydraulic robot synchronous servo control hydraulic cylinder according to claim 1, wherein a cooling portion is fixedly provided between the upper heat-conducting column and the lower heat-conducting column extending from the outer wall, the cooling portion includes a heat-conducting plate and a cooling cavity connected to each other, a cooling liquid is provided in the cooling cavity, one side of the heat-conducting plate is a curved surface matching with the outer wall of the cylinder body, and the heat-conducting plate is provided with a plurality of cooling protrusions extending toward the cooling cavity.
8. The hydraulic robot synchronous servo control hydraulic cylinder according to claim 7, characterized in that a plurality of connecting columns are arranged between the inner wall and the outer wall of the cylinder body in sequence from top to bottom, the connecting columns are matched with the cooling bulges, and the connecting columns are made of copper.
9. The hydraulic robot synchronous servo control hydraulic cylinder according to claim 7 or 8, wherein the cooling protrusions are semicircular, and a space is left between every two adjacent cooling protrusions.
10. The hydraulic robot synchronous servo control hydraulic cylinder according to claims 1-8, characterized in that the connecting column is composed of a first vertical rod, a first horizontal rod and a second vertical rod, the first vertical rod and the second vertical rod are both vertically arranged, two ends of the first horizontal rod are respectively and transversely connected with the first vertical rod and the second vertical rod, one end of the first vertical rod is connected with the heat conducting plate, and one end of the second vertical rod is connected with the inner wall of the cylinder body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011294903.7A CN112324739A (en) | 2020-11-18 | 2020-11-18 | Hydraulic robot synchronous servo control hydraulic cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011294903.7A CN112324739A (en) | 2020-11-18 | 2020-11-18 | Hydraulic robot synchronous servo control hydraulic cylinder |
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| Publication Number | Publication Date |
|---|---|
| CN112324739A true CN112324739A (en) | 2021-02-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011294903.7A Pending CN112324739A (en) | 2020-11-18 | 2020-11-18 | Hydraulic robot synchronous servo control hydraulic cylinder |
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| CN (1) | CN112324739A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113803541A (en) * | 2021-08-31 | 2021-12-17 | 郑煤机智鼎液压有限公司 | Telescopic welding straight-through pipe joint and hydraulic cylinder with same |
| CN118309701A (en) * | 2024-04-03 | 2024-07-09 | 中煤北京煤矿机械有限责任公司 | Colliery is with high reliability and long life pushing hydro-cylinder and auxiliary fixtures in pit |
-
2020
- 2020-11-18 CN CN202011294903.7A patent/CN112324739A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113803541A (en) * | 2021-08-31 | 2021-12-17 | 郑煤机智鼎液压有限公司 | Telescopic welding straight-through pipe joint and hydraulic cylinder with same |
| CN118309701A (en) * | 2024-04-03 | 2024-07-09 | 中煤北京煤矿机械有限责任公司 | Colliery is with high reliability and long life pushing hydro-cylinder and auxiliary fixtures in pit |
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