CN212251015U - Single-cavity speed-regulating type hydraulic coupler - Google Patents
Single-cavity speed-regulating type hydraulic coupler Download PDFInfo
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- CN212251015U CN212251015U CN202021220219.XU CN202021220219U CN212251015U CN 212251015 U CN212251015 U CN 212251015U CN 202021220219 U CN202021220219 U CN 202021220219U CN 212251015 U CN212251015 U CN 212251015U
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Abstract
The utility model discloses a single-cavity speed-regulating type hydraulic coupler, which comprises a box body, a pump wheel, a turbine, a hydraulic shaft sleeve I and a hydraulic shaft sleeve II, wherein the box body is provided with a liquid filling port and a liquid drainage pump pipe; pump impeller and turbine dual set up in the box, pump impeller and I flange fixed connection of hydraulic pressure axle sleeve, turbine and II flange fixed connection of hydraulic pressure axle sleeve, hydraulic pressure axle sleeve I and motor output shaft, hydraulic pressure axle sleeve II and speed reducer machine input shaft, hydraulic pressure axle sleeve I, hydraulic pressure axle sleeve II and box between slip rotate and be connected, have compact structure, occupation space is little, installation environment adaptability is strong, the accessory is few, the efficient characteristics of power transmission.
Description
Technical Field
The utility model relates to a hydraulic coupling technical field specifically is a single chamber speed governing type hydraulic coupling.
Background
The conventional double-cavity fluid coupling mainly comprises a double-cavity power transmission structure consisting of double pump wheels and double turbines, wherein the pump wheels are connected with a motor shaft sleeve flange through a driving shaft; the turbine is connected with the speed reducer through a turbine sleeve, a flange shaft and a coupler, and meanwhile, two bearing seats and two bearing supports must be arranged. The main technical defects are as follows:
the structure is complex, the number of accessories is large, and the processing cost is high;
secondly, the technical requirements for assembly and disassembly are high, and labor and time are wasted;
the installation and the disassembly with the motor reducer are inconvenient;
fourthly, a plurality of easily damaged parts are needed, and the use cost is high because the repair is needed after one period of use;
the double-cavity structure occupies large space, and the hydraulic coupler is mainly applied to the underground environment of the coal mine and has poor environmental adaptability.
Disclosure of Invention
The utility model aims at providing an aqueous medium single chamber speed governing type fluid coupling, compact structure, installation dismantle convenient, do not have overhaul cost.
In order to realize the purpose of the utility model, the utility model adopts the technical proposal that:
a single-cavity speed-regulating type hydraulic coupler comprises a box body, a pump wheel, a turbine, a hydraulic shaft sleeve I and a hydraulic shaft sleeve II, wherein the box body is provided with a liquid filling port and a liquid discharging pump pipe; the pump impeller and the turbine are arranged in the box body in a dual mode, the pump impeller is fixedly connected with the first flange of the hydraulic shaft sleeve, the turbine is fixedly connected with the second flange of the hydraulic shaft sleeve, the first hydraulic shaft sleeve is connected with the output shaft of the motor, the second hydraulic shaft sleeve is connected with the input shaft of the speed reducer machine, and the first hydraulic shaft sleeve, the second hydraulic shaft sleeve and the box body are connected in a sliding and rotating mode.
The seal between the hydraulic shaft sleeve I and the hydraulic shaft sleeve II and the box body is a packing seal or a mechanical labyrinth seal or both.
The pump wheel and the turbine are made of stainless steel S30408, and the smoothness of a working cavity in a rotor of the pump wheel or the turbine is 0.4 a.
The front end and the rear end of the box body are respectively provided with a round hole which is hermetically connected with the hydraulic shaft sleeve I and the hydraulic shaft sleeve II; the front end and the rear end of the box body are respectively fixedly connected with a motor shell and a speed reducer shell in a bolt mode; the motor flange and the speed reducer flange are connected through a box body spigot of the coupler so as to ensure the coaxiality between the motor flange and the speed reducer flange.
The hydraulic shaft sleeve I and the hydraulic shaft sleeve II comprise a shaft outer sleeve and a shaft inner sleeve, the shaft outer sleeve and the shaft inner sleeve are welded and fixed on the same axis, a hydraulic cavity is arranged between the shaft outer sleeve and the shaft inner sleeve, an oil passage is arranged on the shaft outer sleeve, and one end of the oil passage is communicated with the hydraulic cavity.
The thickness of the shaft outer sleeve is at least three times of that of the shaft inner sleeve.
The other end of the oil through pipeline is connected with the oil nozzle, the oil nozzle is also a single valve, high-pressure oil can only enter but not exit, effective combination of the shaft and the hydraulic shaft sleeve is ensured to transmit power, oil can be discharged only by using an oil needle (a special tool) when the driving part is disassembled, and the shaft and the sleeve which are connected together are separated.
The inner sleeve is sleeved on the output shaft of the motor or the input shaft of the speed reducer, and the hydraulic cavity extrudes the inner sleeve after entering high-pressure oil, so that the aperture of the inner sleeve is uniformly reduced, and the hydraulic shaft sleeve and the shaft are firmly connected together.
The oil nozzle is tightly connected with an oil pump supercharger, the oil pump acts, the supercharger supercharges, and high-pressure oil enters the hydraulic cavity.
Furthermore, the hydraulic shaft sleeve I and the hydraulic shaft sleeve II are of a cylindrical structure with one closed end, and the end surface of the inserted motor output shaft or the input shaft of the speed reducer is attached to the inner cylindrical surface of the closed end of the cylindrical structure; furthermore, the hydraulic cavity is intersected with the plane where the closed end surface in the shaft inner sleeve is located.
The hydraulic cavity is in an annular cylinder shape and is coaxial with the shaft inner sleeve.
Further, still including filling the liquid dish, big album of liquid ring, little album of liquid ring, fill the nearly heart end fixed connection of liquid dish and pump impeller outside casing, form ring channel I, the opening of ring channel I is towards the pump impeller centre of a circle, little album of liquid ring is provided with the annular chamber, with pump impeller heart end fixed connection, set up in the turbine outside, it and turbine, be provided with the clearance between the axle sleeve II, big album of liquid ring and the pump impeller outside casing heart end fixed connection, form ring channel II between big album of liquid ring and the little album of liquid ring.
The liquid filling port is communicated with the inner cavity of the box body through the water inlet ring, the inner end outlet of the water inlet ring is arranged at the opening of the annular groove I, and the inner port of the liquid discharge pump pipe is arranged in the groove cavity of the annular groove II for discharging liquid working media.
The liquid filling disc and the large liquid collecting ring are used for blocking water liquid under centrifugal force in the inner annular cavity groove; the pump wheel in the liquid filling disc is provided with a liquid through port communicated with the working cavity in the pump wheel; the small liquid collecting ring is provided with a nozzle, the nozzle is provided with a liquid through port which is communicated with the inner cavity of the box body or the inner cavity of the annular groove II, and the inner cavity of the box body at the position is the inner cavity of the box body at the periphery of the pump wheel and the turbine wheel.
Furthermore, blades are uniformly distributed in the annular groove cavities of the liquid filling disc, the large liquid collecting ring and the small liquid collecting ring.
Furthermore, the water collecting device also comprises a water return pipe, wherein the water return pipe is arranged at the lower part of the box body, a water outlet of the water return pipe is arranged at the opening of the annular groove of the large liquid collecting ring, and the water return pipe is communicated with the inner cavity at the lower end of the box body through a pipeline.
The box body is provided with a window, the window can be opened, the assembly operation of accessories is convenient, and the window can be used as an observation window.
The box body is fixedly connected with a flange plate and is connected with a shell of the motor or the speed reducer through the flange plate.
The mechanical labyrinth seal comprises a baffle ring I fixedly arranged on a hydraulic shaft sleeve I or a hydraulic shaft sleeve II and a baffle ring II fixed in an inner cavity of a box body, wherein the baffle ring I is vertical to the axis of the hydraulic shaft sleeve I or the axis of the hydraulic shaft sleeve II, the baffle ring II is arranged near the periphery of the baffle ring I, and the baffle ring II and the axis of the hydraulic shaft sleeve I or the axis of the hydraulic shaft sleeve II form a 45-degree angle.
The utility model discloses a working process does: the motor output shaft extends into the hydraulic shaft sleeve I, the motor shell is fixed with the box body through bolts, a hydraulic cavity in the hydraulic shaft sleeve I is punched, the connection between the hydraulic shaft sleeve I and the motor output shaft is fastened, and similarly, the hydraulic shaft sleeve II is fixedly connected with the input shaft of the speed reducer, and whether the input shaft is in-place connected with the hydraulic shaft sleeve II can be checked in a mode of marking the input shaft of the speed reducer; the two ends of the box body are respectively and fixedly connected with the motor and the speed reducer box body, so that the stability of the hydraulic coupler is ensured, the output shaft of the motor is directly connected with the pump impeller, and the input shaft of the speed reducer is directly connected with the turbine;
after the hydraulic coupler starts to work, water flows into an annular groove I of a liquid collecting ring through a liquid filling port and a water inlet ring of a box body, and the water is pressed into a working cavity in which a pump impeller and a turbine are combined under the action of centrifugal force; water in the working cavity overflows into the annular cavity of the small liquid collecting ring through the involution gap between the pump wheel and the turbine under the action of centrifugal force, and the water continues to reach the inside of the large liquid collecting ring through the nozzle and is discharged out of the box body through the liquid discharge pump pipe.
The utility model has the advantages that:
1. the structure is compact, the occupied space is small, and the installation environment adaptability is strong;
2. the number of accessories is small, and the motor input shaft is directly connected with the pump wheel through the shaft sleeve I; the turbine is directly connected with the input shaft of the speed reducer through the shaft sleeve II, so that the power transmission efficiency is high;
3. the easily damaged parts are few, and the overhaul is basically not needed.
Drawings
FIG. 1 is a schematic structural view of a conventional dual chamber fluid coupling;
FIG. 2 is a schematic structural diagram of an embodiment of the present invention;
fig. 3 is a schematic structural diagram of the hydraulic bushing ii in fig. 2.
1-pump impeller, 2-turbine, 3-box, 4-inner bearing cap, 5-movable bearing sleeve, 6-outer bearing cap, 7-large bearing, 8-coupler, 9-outer bearing seat, 10-flange shaft, 11-small bearing, 12-inner bearing seat, 13-torque ring, 14-turbine sleeve, 15-middle section, 16-pressure plate, 17-large liquid collecting ring, 18-water return pipe, 19-liquid discharge pump pipe, 20-liquid charging port, 21-water inlet ring, 22-hydraulic shaft sleeve I, 23-hydraulic shaft sleeve II, 24-large liquid collecting ring, 25-small liquid collecting ring, 26-liquid charging plate, 27-blade, 28-baffle ring I, 29-baffle ring II, 30-shaft outer sleeve, 31-shaft inner sleeve, 32-hydraulic chamber, 33-oil passage, 34-one-way valve.
Detailed Description
The present invention will be described in detail with reference to fig. 1, fig. 2, fig. 3.
As shown in fig. 1, a conventional dual-chamber fluid coupling structure is shown, and includes two pump impellers 1, two turbines 2, an inner bearing cover 4, a movable bearing sleeve 5, an outer bearing cover 6, a large bearing 7, a coupler 8, an outer bearing seat 9, a flange shaft 10, a small bearing 11, an inner bearing seat 12, a torque ring 13, a turbine sleeve 14, an intermediate section 15, a pressure plate 16, a large liquid collecting ring 17, and a water return pipe 18, so that the conventional dual-chamber fluid coupling structure is complex in structure and many in parts, which results in high processing cost; the technical requirements for assembly and disassembly are high, and labor and time are wasted; the installation and the disassembly with the motor reducer are inconvenient; the number of wearing parts is large, the wearing parts need to be overhauled after being used for one period, and the use cost is high; meanwhile, the double-cavity hydraulic coupler structure occupies a large space, and the hydraulic coupler is mainly applied to the underground environment of a coal mine and has poor environmental adaptability.
Fig. 2 is a schematic structural view of an embodiment of the present invention, and a single-cavity speed-regulating type hydraulic coupler includes a box body 3, a pump impeller 1, a turbine 2, a hydraulic shaft sleeve i 22, and a hydraulic shaft sleeve ii 23, wherein the box body 3 is provided with a liquid filling port 20 and a liquid discharge pump pipe 19; the pump impeller 1 and the turbine 2 are arranged in the box body 3 in a dual mode, the pump impeller 1 is fixedly connected with a hydraulic shaft sleeve I22 flange, the turbine 2 is fixedly connected with a hydraulic shaft sleeve II 23 flange, the hydraulic shaft sleeve I22 is connected with a motor output shaft, the hydraulic shaft sleeve II 23 is connected with a speed reducer input shaft, and the hydraulic shaft sleeve I22, the hydraulic shaft sleeve II 23 and the box body 3 are connected in a sliding and rotating mode.
The sealing between the hydraulic shaft sleeve I22 and the hydraulic shaft sleeve II 23 and the box body 3 is packing sealing or mechanical labyrinth sealing or both, the sealing is preferably carried out together, and the sealing effect is better.
The pump wheel 1 and the turbine wheel 2 are made of stainless steel S30408, the smoothness of a working cavity in a rotor of the pump wheel 1 or the turbine wheel 2 is 0.4a, and after the smoothness is improved, the output torque of the working cavity with the mirror surface can be improved by more than 1.6 times compared with that of the working cavity with the mirror surface.
The front end and the rear end of the box body 3 are respectively provided with a round hole which is hermetically connected with a hydraulic shaft sleeve I22 and a hydraulic shaft sleeve II 23; the front end and the rear end of the box body 3 are respectively fixedly connected with a motor shell and a speed reducer shell in a bolt mode.
The hydraulic shaft sleeve I22 and the hydraulic shaft sleeve II 23 comprise a shaft outer sleeve 30 and a shaft inner sleeve 31, the shaft outer sleeve 30 is sleeved on the shaft inner sleeve 31, two ends of the same axis of the shaft outer sleeve 30 and the shaft inner sleeve 31 are welded and fixed, a hydraulic cavity 32 is arranged between the shaft outer sleeve 30 and the shaft inner sleeve 31, two ends of the hydraulic cavity 32 are welded and sealed, an oil passage 33 is arranged on the shaft outer sleeve 30, and one end of the oil passage 33 is communicated with the hydraulic cavity 32.
The thickness of the outer shaft sleeve 30 is at least three times that of the inner shaft sleeve 31.
The oil nozzle is also a single valve 34, high-pressure oil can only enter but not exit, the effective combination of the shaft and the hydraulic shaft sleeve is ensured to transmit power, and oil can be discharged only by using an oil needle (special tool) when the driving part is disassembled, so that the shaft and the sleeve which are connected together are separated; the shaft inner sleeve 31 is sleeved on a motor output shaft or an input shaft of a speed reducer, and the hydraulic cavity 32 extrudes the shaft inner sleeve 31 after high-pressure oil enters, so that the aperture of the shaft inner sleeve is uniformly reduced, and the hydraulic shaft sleeve and the shaft are firmly connected together.
The check valve 34 is tightly connected to an oil pump supercharger through a nozzle, and the oil pump is operated to supercharge the supercharger so that high-pressure oil enters the hydraulic chamber 32.
Furthermore, the hydraulic shaft sleeve I22 and the hydraulic shaft sleeve II 23 are of a cylindrical structure with one closed end, and the end surface of the inserted motor output shaft or the input shaft of the speed reducer is attached to the inner cylindrical surface of the closed end of the cylindrical structure; further, the hydraulic chamber 32 intersects with the plane of the closed end surface in the shaft inner sleeve 31.
The hydraulic cavity 32 is in an annular cylinder shape and is coaxial with the shaft inner sleeve 31.
Further, still including filling liquid dish 26, big album of liquid ring 17, little album of liquid ring 25, fill liquid dish 26 and the nearly heart end fixed connection of 1 outside casing of pump impeller, form ring channel I, the opening of ring channel I is towards the 1 centre of a circle of pump impeller, little album of liquid ring 25 is provided with the annular chamber, with 1 heart end fixed connection of pump impeller, set up in the 2 outsides of turbine, it and turbine 2, be provided with the clearance between the axle sleeve II, big album of liquid ring 17 and 1 outside casing heart end fixed connection of pump impeller, form ring channel II between big album of liquid ring 17 and the little album of liquid ring 25.
The liquid filling port 20 is communicated with the inner cavity of the box body 3 through a water inlet ring 21, an inner end outlet of the water inlet ring 21 is arranged at an opening of the annular groove I, and an inner port of the liquid drainage pump pipe 19 is arranged in the groove cavity of the annular groove II to discharge liquid working media.
The liquid filling disc 26 and the large liquid collecting ring 17 are used for blocking water liquid under centrifugal force in an inner annular cavity groove; the pump wheel 1 in the liquid filling disc 26 is provided with a liquid through port communicated with a working cavity in the pump wheel 1; the small liquid collecting ring 25 is provided with a nozzle which is provided with a liquid through port communicated with the inner cavity of the box body 3 or the inner cavity of the annular groove II, and the inner cavity of the box body 3 at the position is the inner cavity of the box body 3 at the periphery of the pump wheel 1 and the turbine wheel 2.
Furthermore, blades 27 are uniformly distributed in the annular cavities of the liquid filling disc 26, the large liquid collecting ring 17 and the small liquid collecting ring 25.
Further, the water collecting device also comprises a water return pipe 18, wherein the water return pipe 18 is arranged at the lower part of the box body 3, a water outlet of the water return pipe 18 is arranged at an opening of an annular groove of the large liquid collecting ring 17, and the water return pipe 18 is communicated with an inner cavity at the lower end of the box body 3 through a pipeline.
The box body 3 is provided with a window which can be opened, so that the assembly operation of accessories is facilitated, and the window can be used as an observation window.
The box body 3 is fixedly connected with a flange plate and is connected with a shell of a motor or a speed reducer through the flange plate.
The mechanical labyrinth seal comprises a retaining ring I28 fixedly arranged on a hydraulic shaft sleeve I22 or a hydraulic shaft sleeve II 23 and a retaining ring II 29 fixed in an inner cavity of the box body 3, wherein the retaining ring I28 is vertical to the axis of the hydraulic shaft sleeve I22 or the axis of the hydraulic shaft sleeve II 23, the retaining ring II 29 is arranged near the periphery of the retaining ring I28, and the retaining ring II 29 and the axis of the hydraulic shaft sleeve I22 or the axis of the hydraulic shaft sleeve II 23 form an angle of 45 degrees.
The utility model discloses a working process does: the output shaft of the motor extends into the hydraulic shaft sleeve I22, the motor shell is fixed with the box body 3 through bolts, a hydraulic cavity 32 in the hydraulic shaft sleeve I22 is punched to fasten the connection between the hydraulic shaft sleeve I22 and the output shaft of the motor, and similarly, the hydraulic shaft sleeve II 23 is fixedly connected with the input shaft of the speed reducer, and whether the input shaft is in-place connection with the hydraulic shaft sleeve II 23 can be checked in a mode of marking the input shaft of the speed reducer; the two ends of the box body 3 are respectively and fixedly connected with the motor and the speed reducer box body 3, so that the stability of the hydraulic coupler is ensured, the output shaft of the motor is directly connected with the pump impeller 1, and the input shaft of the speed reducer is directly connected with the turbine 2;
after the hydraulic coupler starts to work, water flows into an annular groove I of a liquid collecting ring through a tank body liquid filling opening 20 and a water inlet ring 21, and the water is pressed into a working cavity where a pump impeller 1 and a turbine 2 are matched under the action of centrifugal force; water in the working cavity overflows into the annular cavity of the small liquid collecting ring 25 through the involution gap of the pump wheel 1 and the turbine wheel 2 under the action of centrifugal force, and the water continues to pass through the nozzle and finally reaches the large liquid collecting ring 17 and is discharged out of the box body 3 through the liquid discharge pump pipe 19.
The embodiment of the utility model provides a compare with output's two-chamber fluid coupling, under the condition of a less working chamber, the working chamber diameter is only about 10% big, but the volume has reduced more than 30%.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, without departing from the principles of the present invention, several improvements can be made, and these improvements should also be regarded as the protection scope of the present invention without creative work.
Claims (8)
1. A single chamber speed regulation type fluid coupling is characterized in that: the hydraulic pump comprises a box body, a pump wheel, a turbine, a hydraulic shaft sleeve I and a hydraulic shaft sleeve II, wherein the box body is provided with a liquid filling port and a liquid drainage pump pipe; the pump impeller and the turbine are arranged in the box body in a dual mode, the pump impeller is fixedly connected with the first flange of the hydraulic shaft sleeve, the turbine is fixedly connected with the second flange of the hydraulic shaft sleeve, the first hydraulic shaft sleeve is connected with the output shaft of the motor, the second hydraulic shaft sleeve is connected with the input shaft of the speed reducer machine, and the first hydraulic shaft sleeve, the second hydraulic shaft sleeve and the box body are connected in a sliding and rotating mode.
2. The single chamber variable speed fluid coupling of claim 1 wherein: the seal between the hydraulic shaft sleeve I and the hydraulic shaft sleeve II and the box body is a packing seal or a mechanical labyrinth seal or both.
3. The single chamber variable speed fluid coupling of claim 1 wherein: the pump wheel and the turbine are made of stainless steel S30408, and the smoothness of a working cavity in a rotor of the pump wheel or the turbine is 0.4 a.
4. The single chamber variable speed fluid coupling of claim 1 wherein: the front end and the rear end of the box body are respectively provided with a round hole which is hermetically connected with the hydraulic shaft sleeve I and the hydraulic shaft sleeve II; the front end and the rear end of the box body are respectively fixedly connected with a motor shell and a speed reducer shell in a bolt mode; further, the motor flange is connected with the speed reducer flange through a box body spigot of the coupler.
5. The single chamber variable speed fluid coupling of claim 1 wherein: the hydraulic shaft sleeve I and the hydraulic shaft sleeve II comprise a shaft outer sleeve and a shaft inner sleeve, the shaft outer sleeve and the shaft inner sleeve are welded and fixed on the same axis, a hydraulic cavity is arranged between the shaft outer sleeve and the shaft inner sleeve, the shaft outer sleeve is provided with an oil passage, and one end of the oil passage is communicated with the hydraulic cavity; the hydraulic shaft sleeve I and the hydraulic shaft sleeve II are of a cylindrical structure with one closed end; the hydraulic cavity is in an annular cylinder shape and is coaxial with the shaft inner sleeve.
6. The single chamber variable speed fluid coupling of claim 5 wherein: the thickness of the shaft outer sleeve is at least three times of that of the shaft inner sleeve; the other end of the oil pipeline is connected with the oil nozzle.
7. The single chamber variable speed fluid coupling of claim 5 wherein: the hydraulic cavity is intersected with the plane where the closed end face in the shaft inner sleeve is located.
8. The single chamber variable speed fluid coupling of claim 1 wherein: the liquid filling disc is fixedly connected with the near-center end of the shell on the outer side of the pump wheel to form an annular groove I, the opening of the annular groove I faces the center of the pump wheel, the small liquid collecting ring is provided with an annular cavity and is fixedly connected with the far-center end of the pump wheel and arranged on the outer side of the turbine, gaps are formed between the annular cavity and the turbine and between the annular cavity and a shaft sleeve II, the large liquid collecting ring is fixedly connected with the far-center end of the shell on the outer side of the pump wheel, and an annular groove II is formed between the large liquid collecting ring and the small liquid collecting ring; the liquid filling port is communicated with the inner cavity of the box body through a water inlet ring, an outlet at the inner end of the water inlet ring is arranged at an opening of the annular groove I, and an inner port of the liquid discharge pump pipe is arranged in a groove cavity of the annular groove II; the liquid filling disc and the large liquid collecting ring are used for blocking water liquid under centrifugal force in the inner annular cavity groove; the pump wheel in the liquid filling disc is provided with a liquid through port communicated with the working cavity in the pump wheel; the small liquid collecting ring is provided with a nozzle, the nozzle is provided with a liquid through port which is communicated with the inner cavity of the box body or the inner cavity of the annular groove II, and the inner cavity of the box body at the position is the inner cavity of the box body at the periphery of the pump wheel and the turbine wheel.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021220219.XU CN212251015U (en) | 2020-06-29 | 2020-06-29 | Single-cavity speed-regulating type hydraulic coupler |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021220219.XU CN212251015U (en) | 2020-06-29 | 2020-06-29 | Single-cavity speed-regulating type hydraulic coupler |
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| CN212251015U true CN212251015U (en) | 2020-12-29 |
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| CN202021220219.XU Active CN212251015U (en) | 2020-06-29 | 2020-06-29 | Single-cavity speed-regulating type hydraulic coupler |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111623100A (en) * | 2020-06-29 | 2020-09-04 | 韩石全 | Single-cavity speed-regulating type hydraulic coupler |
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2020
- 2020-06-29 CN CN202021220219.XU patent/CN212251015U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111623100A (en) * | 2020-06-29 | 2020-09-04 | 韩石全 | Single-cavity speed-regulating type hydraulic coupler |
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