CN108071624B - Integrated hydraulic cylinder - Google Patents
Integrated hydraulic cylinder Download PDFInfo
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- CN108071624B CN108071624B CN201710735619.0A CN201710735619A CN108071624B CN 108071624 B CN108071624 B CN 108071624B CN 201710735619 A CN201710735619 A CN 201710735619A CN 108071624 B CN108071624 B CN 108071624B
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- hydraulic rod
- cylinder body
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- cylinder
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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
- F15B15/1409—Characterised by the construction of the motor unit of the straight-cylinder type with two or more independently movable working pistons
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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
Abstract
The invention belongs to the technical field of hydraulic cylinders, and provides an integrated hydraulic cylinder, which comprises: the bottom end of the cylinder body is provided with a cylinder body of a liquid inlet and a liquid outlet which are connected with a hydraulic pump; the cylinder end cover is arranged at the opening end of the cylinder; the hydraulic rod penetrates through the end cover through hole, a hydraulic rod disc is arranged at the end part of the hydraulic rod and arranged in the cylinder body, and a hydraulic rod disc through hole is formed in the hydraulic rod disc; a first cavity is formed between the cylinder body end cover and the hydraulic rod disc as well as between the cylinder body end cover and the side wall of the cylinder body; the power piston is arranged in the cylinder body and between the hydraulic rod disc and the bottom end of the cylinder body, a middle cavity is formed among the power piston, the hydraulic rod disc and the side wall of the cylinder body, and a fourth cavity is formed among the power piston, the bottom end of the cylinder body and the side wall of the cylinder body; the first cavity, the middle cavity and the fourth cavity are filled with liquid. The integrated hydraulic cylinder can provide active driving force in a power state, and can realize a passive telescopic function in an unpowered state.
Description
Technical Field
The invention belongs to the technical field of hydraulic cylinders, and particularly relates to an integrated hydraulic cylinder.
Background
In the control process of industrial production, a hydraulic control system is largely used, and a hydraulic cylinder is a core element of the hydraulic control system. The hydraulic cylinder is a hydraulic actuating element which converts hydraulic energy into mechanical energy and enables the machine to realize reciprocating motion, and the hydraulic cylinder has stable transmission work and high reliability. The traditional hydraulic cylinder comprises a cylinder body, a piston and a piston rod, wherein an oil inlet and an oil outlet are formed in the cylinder body, the piston and the piston rod move through the inlet and the outlet of hydraulic oil, and the control function is realized through an external component, so that active driving force can be provided.
In the actual production process, various forms of hydraulic cylinders are usually needed to complete corresponding movements, however, the movement form of the traditional hydraulic cylinder is single, and the passive telescopic function cannot be realized while active driving force is provided.
The above disadvantages need to be improved.
Disclosure of Invention
The invention aims to provide an integrated hydraulic cylinder, which solves the technical problems that the traditional hydraulic cylinder in the prior art has a single motion mode and cannot realize a passive telescopic function while providing an active driving force.
In order to achieve the purpose, the invention adopts the technical scheme that: an integrated hydraulic cylinder is provided, comprising:
the hydraulic pump comprises a cylinder body, wherein a liquid inlet and a liquid outlet which are used for being connected with a hydraulic pump are formed in the bottom end of the cylinder body, and an opening is formed in the opening end of the cylinder body;
the cylinder body end cover is sealed at the opening end of the cylinder body and is provided with an end cover through hole;
the hydraulic rod penetrates through the end cover through hole, a hydraulic rod disc is arranged at the end part of the hydraulic rod and arranged in the cylinder body, a hydraulic rod disc through hole is formed in the hydraulic rod disc, and the circumference of the hydraulic rod disc is in seamless sliding connection with the inner wall of the cylinder body; a first cavity is formed among the cylinder body end cover, the hydraulic rod disc and the side wall of the cylinder body;
the power piston is arranged in the cylinder body and between the hydraulic rod disc and the bottom end of the cylinder body, the circumference of the power piston is in seamless sliding connection with the inner wall of the cylinder body, a middle cavity is formed among the power piston, the hydraulic rod disc and the side wall of the cylinder body, and a fourth cavity is formed among the power piston, the bottom end of the cylinder body and the side wall of the cylinder body;
the first cavity, the middle cavity and the fourth cavity are filled with liquid.
Further, still include:
the hydraulic rod is hollow, the motor is arranged in the hydraulic rod, and the motor is provided with a motor shaft;
the separation blade, the separation blade is located the hydraulic stem disc with between the power piston just the separation blade passes through the motor shaft with the motor is connected, the motor can drive the separation blade is rotatory, the separation blade for the separation blade through-hole has been seted up to the position of hydraulic stem disc through-hole, the separation blade through-hole with the contact ratio of hydraulic stem disc through-hole passes through the motor is adjusted.
Further, the size of the baffle plate through hole is the same as that of the hydraulic rod disc through hole.
Further, the separation blade is provided with a separation blade flange, and the separation blade flange is arranged in the hydraulic rod.
Furthermore, a sliding bearing is sleeved on the baffle flange, and the outer wall of the sliding bearing is in seamless sliding connection with the inner wall of the hydraulic rod.
Furthermore, one end of the hydraulic rod, which is arranged outside the cylinder body, is provided with a hydraulic rod end cover, and an end cover connecting part used for being connected with external equipment is arranged on the hydraulic rod end cover.
Further, still include:
the free piston is arranged between the blocking piece and the power piston, and the circumference of the free piston is in seamless sliding connection with the inner wall of the cylinder body;
a second cavity is formed among the free piston, the baffle plate and the side wall of the cylinder body, and liquid is filled in the second cavity;
a third cavity is formed among the free piston, the power piston and the side wall of the cylinder body, and air is filled in the third cavity;
the bottom spring is arranged in the third cavity, and two ends of the bottom spring are respectively connected with the free piston and the power piston.
Further, the hydraulic cylinder further comprises an inner spring, the inner spring is sleeved on the hydraulic rod, and the inner spring is arranged between the cylinder body end cover and the hydraulic rod disc.
Further, still include:
the adjusting nut is sleeved on the hydraulic rod and positioned outside the cylinder body, and can slide along the hydraulic rod;
and the outer spring is sleeved on the hydraulic rod and is arranged between the cylinder body end cover and the adjusting nut.
Further, the cylinder body bottom still is equipped with the bottom connecting portion that are used for being connected with external equipment.
The integrated hydraulic cylinder provided by the invention has the beneficial effects that: due to the fact that the cylinder body, the hydraulic rod and the power piston are matched with each other, the integrated hydraulic cylinder can provide active driving force when in a power state, and can achieve a passive telescopic function when in a non-power state, and therefore the same hydraulic cylinder can provide the active driving force and can achieve the passive telescopic function.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed for the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
Fig. 1 is a schematic cross-sectional structural view of an integrated hydraulic cylinder according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of an integrated hydraulic cylinder according to an embodiment of the present invention;
FIG. 3 is another schematic structural diagram of an integrated hydraulic cylinder according to an embodiment of the present invention;
FIG. 4 is a schematic view of a partial structure of an integrated hydraulic cylinder according to an embodiment of the present invention;
fig. 5 is a schematic diagram of an explosive structure of the integrated hydraulic cylinder according to the embodiment of the invention.
Wherein, in the figures, the respective reference numerals:
11-a cylinder body; 111-cylinder bottom end; 112-cylinder open end;
113-a liquid inlet; 114-a liquid outlet; 115-a bottom end connection;
12-cylinder end cap; 121-end cap through hole; 122-end cap flange;
21-a hydraulic rod; 211-hydraulic stem disc; 2111-hydraulic rod disk through hole;
22-a motor; 221-a motor shaft; 222-a baffle plate;
2221-a baffle through hole; 2222-flap flange 23-sliding bearing;
24-hydraulic rod end caps; 241-end cap connection; 31-a power piston;
32-free piston; 33-bottom spring; 34-an inner spring;
35-an outer spring; 351-an adjusting nut; 41-a first cavity;
42-a second cavity; 43-a third cavity; 44-fourth cavity.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
It will be understood that when an element is referred to as being "disposed on" another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element. 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, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
Referring to fig. 1, 4 and 5, an integrated hydraulic cylinder includes a cylinder body 11, a cylinder end cover 12, a hydraulic rod 21 and a power piston 31. A liquid inlet 113 and a liquid outlet 114 which are used for being connected with a hydraulic pump are formed in the bottom end 111 of the cylinder body 11, and an opening is formed in the open end 112 of the cylinder body 11; the cylinder end cover 12 is sealed at the cylinder opening end 112, and the cylinder end cover 12 is provided with an end cover through hole 121; the hydraulic rod 21 penetrates through the end cover through hole 121, the outer diameter of the hydraulic rod 21 is matched with the diameter of the end cover through hole 121, namely the hydraulic rod 21 is in seamless sliding connection with the end cover through hole 121, a hydraulic rod disc 211 is arranged at the end part of the hydraulic rod 21, the hydraulic rod disc 211 is arranged in the cylinder body 11, a hydraulic rod disc through hole 2111 is formed in the hydraulic rod disc 211, and the circumference of the hydraulic rod disc 211 is in seamless sliding connection with the inner wall of the cylinder body 11; a first cavity 41 is formed between the cylinder end cover 12 and the hydraulic rod disc 211 and the side wall of the cylinder 11; the power piston 31 is arranged in the cylinder body 11 and between the hydraulic rod disc 211 and the cylinder body bottom end 111, the circumference of the power piston 31 is in seamless sliding connection with the inner wall of the cylinder body 11, a middle cavity is formed between the power piston 31 and the hydraulic rod disc 211 as well as between the power piston 31 and the side wall of the cylinder body 11, and a fourth cavity 44 is formed between the power piston 31 and the cylinder body bottom end 111 as well as between the power piston 31 and the side wall of the cylinder body 11; the first chamber 41, the middle chamber and the fourth chamber 44 are filled with liquid.
The working principle of the integrated hydraulic cylinder provided by the embodiment is as follows:
first, the first chamber 41, the middle chamber and the fourth chamber 44 are filled with liquid;
when the hydraulic pump is in an unpowered state, the hydraulic pump does not work, the liquid inlet 113 and the liquid outlet 114 are completely closed, so that the liquid amount in the fourth cavity 44 is kept consistent, the power piston 31 and the cylinder 11 do not move relatively, when the hydraulic rod 21 is pressurized, the hydraulic rod 21 moves towards the direction close to the bottom end 111 of the cylinder, so that the hydraulic rod disc 211 moves towards the direction close to the power piston 31, the volume of the middle cavity is reduced, and the liquid in the middle cavity flows towards the first cavity 41 through the hydraulic rod disc through hole 2111 to adapt to the volume change of the middle cavity; when the hydraulic rod 21 is pulled, the hydraulic rod 21 moves in the direction away from the bottom end 111 of the cylinder body, so that the hydraulic rod disc 211 moves in the direction away from the power piston 31, the volume of the middle cavity is increased, and the liquid in the first cavity 41 flows to the middle cavity through the hydraulic rod disc through hole 2111 to adapt to the volume change of the middle cavity;
when the hydraulic pump is in a power state, the hydraulic pump works, the liquid inlet 113 and the liquid outlet 114 are both opened and connected with the hydraulic pump, the hydraulic pump injects liquid into the fourth cavity 44 through the liquid inlet 113, the pressure of the liquid in the fourth cavity 44 on the power piston 31 is increased, the pressure of the liquid in the middle cavity by the power piston 31 is further increased, and the pressure of the liquid in the middle cavity on the hydraulic rod 21 is further increased, so that the hydraulic rod 21 is pushed to move in a direction away from the bottom end 111 of the cylinder body, the volume of the first cavity 41 is reduced, and the liquid in the first cavity 41 flows to the middle cavity through the disc through hole 2111 of the hydraulic rod so as to adapt to the volume change of the first cavity 41; when the liquid in the fourth cavity 44 flows out of the fourth cavity 44 through the liquid outlet 114, the pressure of the liquid in the fourth cavity 44 to the power piston 31 is reduced, and further the pressure of the power piston 31 to the liquid in the middle cavity is reduced, and further the pressure of the liquid in the middle cavity to the hydraulic rod 21 is reduced, so that the pressure of the liquid in the first cavity 41 to the hydraulic rod 21 is greater than the pressure of the liquid in the middle cavity to the hydraulic rod 21, and thus the hydraulic rod 21 is pushed to move towards the direction close to the bottom end 111 of the cylinder body, the volume of the middle cavity is reduced, and the liquid in the middle cavity flows towards the first cavity 41 through the hydraulic rod disc through hole 2111 so as to adapt to the volume change of the middle cavity.
The beneficial effect that so set up lies in: due to the mutual matching of the cylinder body 11, the hydraulic rod 21 and the power piston 31, the integrated hydraulic cylinder can provide active driving force in a power state, and can realize a passive telescopic function in an unpowered state, so that the same hydraulic cylinder can provide the active driving force and can realize the passive telescopic function.
Further, the cylinder end cover 12 is provided with a cylinder end cover flange 122, when the cylinder end cover 12 is in fit connection with the cylinder opening end 112, the cylinder end cover flange 122 is placed in the cylinder 11, and the outer wall of the cylinder end cover flange 122 is in seamless fit connection with the inner wall of the cylinder 11, and the diameter of the cylinder end cover 12 is not less than the outer diameter of the cylinder 11. The cylinder bottom end 111 is also provided with a bottom end connection portion 115 for connection with an external device.
Further, the integrated hydraulic cylinder provided by the embodiment further includes a motor 22 and a blocking piece 222, the hydraulic rod 21 is hollow, the motor 22 is disposed in the hydraulic rod 21, and the motor 22 is provided with a motor shaft 221; the blocking piece 222 is arranged between the hydraulic rod disc 211 and the power piston 31, the blocking piece 222 is connected with the motor 22 through the motor shaft 221, the motor 22 can drive the blocking piece 222 to rotate, a blocking piece through hole 2221 is formed in the position, corresponding to the hydraulic rod disc through hole 2111, of the blocking piece 222, and the overlap ratio of the blocking piece through hole 2221 and the hydraulic rod disc through hole 2111 is adjusted through the motor 22. The diameter of the stopper 222 is the same as that of the hydraulic rod disk 211, and the stopper through hole 2221 is the same as the hydraulic rod disk through hole 2111.
Referring to fig. 1 and 4, the motor 22 can drive the blocking plate 222 to rotate through the motor shaft 221, so as to adjust the overlapping ratio between the blocking plate through hole 2221 and the hydraulic rod disc through hole 2111, further adjust the flowing speed of the liquid between the first cavity 41 and the middle cavity, further adjust the expansion and contraction speed of the hydraulic rod 21, and thus play a role in damping: when the baffle through-hole 2221 and the hydraulic rod disk through-hole 2111 are not coincident at all, the liquid in the first chamber 41 and the liquid in the middle chamber cannot flow each other, so that the hydraulic rod 21 cannot move relative to the cylinder 11; when the baffle through hole 2221 and the hydraulic rod disc through hole 2111 are completely overlapped, the resistance of the mutual flowing of the liquid in the first cavity 41 and the liquid in the middle cavity is minimum, so that the resistance of the hydraulic rod 21 during movement is minimum, and the expansion and contraction speed of the hydraulic rod 21 is fastest; the smaller the coincidence degree of the flap through hole 2221 and the hydraulic rod disk through hole 2111 is, the greater the resistance to the mutual flow of the liquid in the first chamber 41 and the liquid in the middle chamber is, and the slower the telescopic speed of the hydraulic rod 21 is.
In this embodiment, the hydraulic rod disk 211 has 8 hydraulic rod disk through holes 2111 with the same size uniformly formed on the circumference thereof, and the blocking plate 222 has 8 blocking plate through holes 2221 with the same size correspondingly formed on the circumference thereof corresponding to the positions of the hydraulic rod disk through holes 2111.
In other embodiments, the diameter of the blocking piece 222 can be slightly smaller than the diameter of the hydraulic rod disk 211, and the blocking piece through hole 2221 on the blocking piece 222 corresponds to the position of the hydraulic rod disk through hole 2111.
Further, the stopper 222 is provided with a stopper flange 2222, and the stopper flange 2222 is provided in the hydraulic rod 21, so that the stopper 222 can be better connected to the hydraulic rod 21. The stopper flange 2222 is sleeved with a sliding bearing 23, the inner diameter of the sliding bearing 23 is matched with the outer diameter of the stopper flange 2222, the outer wall of the sliding bearing 23 is arranged on the inner wall of the hydraulic rod 21, and the outer diameter of the sliding bearing 23 is matched with the inner diameter of the hydraulic rod 21. When the baffle sheet 222 rotates relative to the hydraulic rod 21 under the driving of the motor 22, the sliding bearing 23 can greatly reduce friction loss and surface abrasion, and the work is stable, reliable and noiseless.
Furthermore, a hydraulic rod end cover 24 is disposed at one end of the hydraulic rod 21 outside the cylinder 11, and an end cover connecting portion 241 for connecting with an external device is disposed on the hydraulic rod end cover 24. The motor 22 can be encapsulated in the hydraulic rod 21 by the hydraulic rod end cover 24, so that the motor 22 can be protected on one hand, and the appearance of the integrated hydraulic cylinder is more attractive on the other hand.
Referring to fig. 1, fig. 3 and fig. 5, further, the integrated hydraulic cylinder provided in this embodiment further includes a free piston 32 and a bottom spring 33, the free piston 32 is disposed between the blocking plate 222 and the power piston 31, and the circumference of the free piston 32 is in seamless sliding connection with the inner wall of the cylinder 11; a second cavity 42 is formed between the free piston 32, the baffle 222 and the side wall of the cylinder 11, and the second cavity 42 is filled with liquid; a third cavity 43 is formed between the free piston 32 and the power piston 31 and the side wall of the cylinder 11, and air is filled in the third cavity 43; the bottom spring 33 is disposed in the third cavity 43, and both ends of the bottom spring 33 are connected to the free piston 32 and the power piston 31, respectively.
The process of charging and discharging the bottom spring 33 is as follows:
in the unpowered state, when the hydraulic rod 21 is pressurized, the hydraulic rod 21 moves towards the direction close to the bottom end 111 of the cylinder body, so that the hydraulic rod disc 211 moves towards the direction close to the power piston 31, the volume of the second cavity 42 decreases, the pressure in the second cavity 42 increases, so that the free piston 32 is pushed to move towards the direction close to the power piston 31, the bottom spring 33 is compressed, and energy is stored in the compressed bottom spring 33; when the hydraulic rod 21 is pulled, the hydraulic rod 21 moves in a direction away from the bottom end 111 of the cylinder body, so that the hydraulic rod disc 211 moves in a direction away from the power piston 31, the volume of the second cavity 42 becomes larger, the pressure in the second cavity 42 decreases, and the bottom spring 33 gradually returns, so that the stored energy is released, and the free piston 32 is pushed to move in a direction away from the power piston 31;
when the hydraulic pump injects liquid into the fourth cavity 44 through the liquid inlet 113 in a powered state, the pressure of the liquid in the fourth cavity 44 on the power piston 31 is increased, the power piston 31 is pushed to move in a direction away from the bottom end 111 of the cylinder body, so that the bottom spring 33 is compressed, and energy is stored in the compressed bottom spring 33; when the liquid in the fourth chamber 44 flows out of the fourth chamber 44 through the liquid outlet 114, the pressure of the liquid in the fourth chamber 44 on the power piston 31 decreases, and the bottom spring 33 gradually returns, thereby releasing the stored energy and pushing the power piston 31 to move toward the cylinder bottom 111.
Because the third cavity 43 is filled with air, and the third cavity 43 is internally provided with the telescopic bottom spring 33, the third cavity 43 is a telescopic cavity, on one hand, the compression and recovery processes of the bottom spring 33 can play a role in energy storage and energy release, on the other hand, the compressibility of the third cavity 43 can solve the problem of overlarge pressure caused by the volume reduction of the second cavity 42 when the hydraulic rod 21 moves towards the direction close to the bottom end 111 of the cylinder body, so that the change of the second cavity 42 in the cylinder body 21 caused by the hydraulic rod 21 in the telescopic process has adaptability, and the integrated hydraulic cylinder can be protected.
Further, the integrated hydraulic cylinder provided by the embodiment further includes an inner spring 34, the inner spring 34 is sleeved on the hydraulic rod 21, and the inner spring 34 is disposed between the cylinder end cover 12 and the hydraulic rod disk 211. Since the hydraulic rod 21 compresses the inner spring 34 when moving in a direction away from the cylinder bottom end 111, energy is stored in the compressed inner spring 34; the inner spring 34 is gradually restored when the hydraulic rod 21 moves in a direction approaching the cylinder bottom end 111, thereby releasing the stored energy and pushing the hydraulic rod 21 to move. The inner spring 34 can thus act as a charge and discharge of energy during the extension and retraction of the hydraulic rod 21.
Referring to fig. 1, fig. 2 and fig. 5, further, the integrated hydraulic cylinder provided in the present embodiment further includes an adjusting nut 351, the adjusting nut 351 is sleeved on the hydraulic rod 21 and located outside the cylinder body 11, and the adjusting nut 351 can slide along the hydraulic rod 21; and the outer spring 35 is sleeved on the hydraulic rod 21 and is arranged between the cylinder end cover 12 and the adjusting nut 351. Since the adjustment nut 351 is slidable along the hydraulic rod 21, the initial compression length of the outer spring 35, and thus the initial preload force, can be adjusted. Since the hydraulic rod 21 compresses the outer spring 35 when moving in a direction close to the cylinder bottom end 111, energy is stored in the compressed outer spring 35; the outer spring 35 is gradually returned when the hydraulic rod 21 moves in a direction away from the cylinder bottom end 111, thereby releasing the stored energy and pushing the hydraulic rod 21 to move. The outer spring 35 can thus act as a charge and discharge of energy during the extension and retraction of the hydraulic rod 21.
The integrated hydraulic cylinder provided by the embodiment can be used for knee joint parts of the walking-aid robot, and the integrated hydraulic cylinder can help a user to walk by stretching of the hydraulic rod; the integrated hydraulic cylinder is connected with the hydraulic pump to provide active driving force, so that a user is helped to go up and down stairs or walk; meanwhile, when a user needs to support, the integrated hydraulic cylinder can provide a large supporting force for the user.
The working principle of the integrated hydraulic cylinder provided by the embodiment when the integrated hydraulic cylinder is connected to the knee joint part of the walking-aid robot is as follows:
first the first, second and fourth cavities 41, 42, 44 are filled with liquid and the third cavity is kept filled with air.
In the unpowered state, the hydraulic pump does not work, the liquid inlet 113 and the liquid outlet 114 are completely closed, so that the liquid amount in the fourth cavity 44 is kept consistent, and the power piston 31 and the cylinder 11 do not move relatively;
when a user bends the knee, the hydraulic rod 21 is subjected to pressure, the hydraulic rod 21 moves towards the direction close to the bottom end 111 of the cylinder body, so that the hydraulic rod disc 211 moves towards the direction close to the power piston 31, the outer spring 35 is compressed, energy is stored in the compressed outer spring 35, the volume of the second cavity 42 is reduced, the pressure in the second cavity 42 is increased, the free piston 32 is pushed to move towards the direction close to the power piston 31, the bottom spring 33 is compressed, the energy is stored in the compressed bottom spring 33, the liquid in the second cavity 42 flows towards the first cavity 41 through the hydraulic rod disc through hole 2111 to adapt to the volume change of the second cavity 42, the volume of the first cavity 41 is increased, the inner spring 34 in the first cavity 41 is gradually restored, and the energy stored in the inner spring 34 is released;
when a user extends knees, the hydraulic rod 21 is pulled, the hydraulic rod 21 moves in the direction away from the bottom end 111 of the cylinder body, so that the hydraulic rod disc 211 moves in the direction away from the power piston 31, the outer spring 35 gradually returns, the energy stored in the outer spring 35 is released, the volume of the second cavity 42 is increased, the pressure in the second cavity 42 is reduced, the bottom spring 33 gradually returns, the stored energy is released, the free piston 33 is pushed to move in the direction away from the power piston 31, the liquid in the first cavity 41 flows to the second cavity 42 through the hydraulic rod disc through hole 2111 to adapt to the volume change of the second cavity 42, the volume of the first cavity 41 is reduced, the inner spring 34 in the first cavity 41 is compressed, and the energy is stored in the compressed inner spring 34.
When the power state exists, the hydraulic pump works, the liquid inlet 113 and the liquid outlet 114 are both completely opened and are connected with the hydraulic pump;
when the hydraulic pump injects liquid into the fourth cavity 44 through the liquid inlet 113, the pressure of the liquid in the fourth cavity 44 on the power piston 31 is increased, the power piston 31 is pushed to move in the direction away from the cylinder bottom 111, so that the bottom spring 33 is compressed, energy is stored in the compressed bottom spring 33, the pressure of the free piston 33 on the second cavity 42 is increased, so that the hydraulic rod 21 is pushed to move in the direction away from the cylinder bottom 111, the liquid in the first cavity 41 flows to the second cavity 42 through the hydraulic rod disk through hole 2111, the volume of the first cavity 41 is reduced, the inner spring 34 in the first cavity 41 is compressed, energy is stored in the compressed inner spring 34, and simultaneously, the outer spring 35 is gradually restored, and the energy stored in the outer spring 35 is released;
when the liquid in the fourth cavity 44 flows out of the fourth cavity 44 through the liquid outlet 114, the pressure of the liquid in the fourth cavity 44 on the power piston 31 is reduced, the bottom spring 33 gradually returns to release the stored energy, the pressure of the free piston 33 on the second cavity 42 is reduced, the pressure applied to the hydraulic rod 21 is reduced, the hydraulic rod 21 is pushed to move towards the direction close to the bottom end 111 of the cylinder body, the liquid in the second cavity 42 flows towards the first cavity 41 through the hydraulic rod disc through hole 2111, the volume of the first cavity 41 is increased, the inner spring 34 in the first cavity 41 gradually returns, the energy stored in the inner spring 34 is released, the outer spring 35 is compressed, and the energy is stored in the outer spring 35.
In a powered state or an unpowered state, the flowing speed of the liquid between the first cavity 41 and the second cavity 42 can be adjusted by adjusting the contact degree between the baffle through hole 2221 and the hydraulic rod disc through hole 2111, so that the stretching speed of the hydraulic rod 21 can be adjusted, and the damping effect is achieved.
When in the supporting state, the stopper through hole 2221 and the hydraulic rod disk through hole 2111 are completely misaligned, so that the liquid in the first chamber 41 and the liquid in the second chamber 42 cannot flow each other, and the hydraulic rod 21 does not move relative to the hydraulic cylinder 11, thereby providing a large supporting force.
The integrated hydraulic cylinder provided by the embodiment has the following beneficial effects:
(1) the cylinder body 11, the hydraulic rod 21 and the power piston 31 are matched with each other, so that the integrated hydraulic cylinder can provide active driving force in a power state and can realize a passive telescopic function in an unpowered state, and the same hydraulic cylinder can provide the active driving force and can realize the passive telescopic function;
(2) the motor 22 can drive the baffle 222 to rotate through the motor shaft 221, so that the contact ratio of the baffle through hole 2221 and the hydraulic rod disc through hole 2111 can be adjusted, the flowing speed of liquid between the first cavity 41 and the second cavity 42 can be further adjusted, the expansion and contraction speed of the hydraulic rod 21 can be further adjusted, and a damping effect can be achieved;
(3) the third cavity 43 is filled with air, and the third cavity 43 is internally provided with the telescopic bottom spring 33, so that the third cavity 43 is a telescopic cavity, the problem of overlarge pressure caused by the volume reduction of the second cavity 42 when the hydraulic rod 21 moves to be close to the cylinder body 1 is solved, the change of the second cavity 42 in the cylinder body 11 caused by the telescopic process of the hydraulic rod 21 has adaptability, and the integrated hydraulic cylinder can be protected;
(4) the bottom spring 33, the inner spring 34 and the outer spring 35 can store energy in the compression process, and can release energy in the return process, so that the energy is saved, the buffer effect is achieved in the compression and return processes of the springs, and power is provided for the next action;
(5) the adjusting nut 351 can be adjusted according to different rehabilitation periods of the user, so that the initial pretightening force can be adjusted, and the requirements of different users are met;
(6) according to the maximum angle condition that the leg of the user can be bent, the maximum angle that the knee joint of the walking-aid robot can be bent can be adjusted by adjusting the length of the fourth cavity 44, so that the requirements of different users can be met.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (8)
1. An integrated hydraulic cylinder, characterized in that: comprises that
The hydraulic pump comprises a cylinder body, wherein a liquid inlet and a liquid outlet which are used for being connected with a hydraulic pump are formed in the bottom end of the cylinder body, and an opening is formed in the opening end of the cylinder body;
the cylinder body end cover is sealed at the opening end of the cylinder body and is provided with an end cover through hole;
the hydraulic rod penetrates through the end cover through hole, a hydraulic rod disc is arranged at the end part of the hydraulic rod and arranged in the cylinder body, a hydraulic rod disc through hole is formed in the hydraulic rod disc, and the circumference of the hydraulic rod disc is in seamless sliding connection with the inner wall of the cylinder body; a first cavity is formed among the cylinder body end cover, the hydraulic rod disc and the side wall of the cylinder body;
the power piston is arranged in the cylinder body and between the hydraulic rod disc and the bottom end of the cylinder body, the circumference of the power piston is in seamless sliding connection with the inner wall of the cylinder body, and a fourth cavity is formed among the power piston, the bottom end of the cylinder body and the side wall of the cylinder body;
the first cavity and the fourth cavity are filled with liquid;
the hydraulic rod is hollow, the motor is arranged in the hydraulic rod, and the motor is provided with a motor shaft;
the separation blade is arranged between the hydraulic rod disc and the power piston and is connected with the motor through the motor shaft, the motor can drive the separation blade to rotate, a separation blade through hole is formed in the position, relative to the hydraulic rod disc through hole, of the separation blade, and the overlap ratio of the separation blade through hole and the hydraulic rod disc through hole is adjusted through the motor;
the free piston is arranged between the blocking piece and the power piston, and the circumference of the free piston is in seamless sliding connection with the inner wall of the cylinder body;
a second cavity is formed among the free piston, the baffle plate and the side wall of the cylinder body, and liquid is filled in the second cavity;
a third cavity is formed among the free piston, the power piston and the side wall of the cylinder body, and air is filled in the third cavity;
the bottom spring is arranged in the third cavity, and two ends of the bottom spring are respectively connected with the free piston and the power piston.
2. The integrated hydraulic cylinder of claim 1, wherein: the size of the baffle plate through hole is the same as that of the hydraulic rod disc through hole.
3. The integrated hydraulic cylinder of claim 1, wherein: the separation blade is equipped with the separation blade flange, the separation blade flange is located in the hydraulic stem.
4. The integrated hydraulic cylinder of claim 3, wherein: the separation blade flange is sleeved with a sliding bearing, and the outer wall of the sliding bearing is in seamless sliding connection with the inner wall of the hydraulic rod.
5. The integrated hydraulic cylinder of claim 1, wherein: the hydraulic rod is arranged at one end outside the cylinder body and is provided with a hydraulic rod end cover, and an end cover connecting part used for being connected with external equipment is arranged on the hydraulic rod end cover.
6. The integrated hydraulic cylinder of any one of claims 1 to 5, wherein: the hydraulic cylinder further comprises an inner spring, the inner spring is sleeved on the hydraulic rod, and the inner spring is arranged between the cylinder body end cover and the hydraulic rod disc.
7. The integrated hydraulic cylinder of any one of claims 1 to 5, wherein: also comprises
The adjusting nut is sleeved on the hydraulic rod and positioned outside the cylinder body, and can slide along the hydraulic rod;
and the outer spring is sleeved on the hydraulic rod and is arranged between the cylinder body end cover and the adjusting nut.
8. The integrated hydraulic cylinder of any one of claims 1 to 5, wherein: the cylinder body bottom still is equipped with the bottom connecting portion that are used for being connected with external equipment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710735619.0A CN108071624B (en) | 2017-08-24 | 2017-08-24 | Integrated hydraulic cylinder |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710735619.0A CN108071624B (en) | 2017-08-24 | 2017-08-24 | Integrated hydraulic cylinder |
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| CN108071624A CN108071624A (en) | 2018-05-25 |
| CN108071624B true CN108071624B (en) | 2020-03-20 |
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| CN201710735619.0A Active CN108071624B (en) | 2017-08-24 | 2017-08-24 | Integrated hydraulic cylinder |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111016245A (en) * | 2019-12-03 | 2020-04-17 | 合肥铭衡机械制造有限公司 | Hydraulic cylinder for punching machine with cooling function |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1888466A (en) * | 2005-06-28 | 2007-01-03 | 比亚迪股份有限公司 | Adjustable damping vibration reducer |
| CN200952545Y (en) * | 2006-08-10 | 2007-09-26 | 袁建明 | Vibration damper |
| CN201326674Y (en) * | 2008-12-15 | 2009-10-14 | 浙江恒辉金属制品有限公司 | Hydraulic damper |
| CN203297457U (en) * | 2013-05-30 | 2013-11-20 | 慈溪市正大车业有限公司 | Shock absorber assembly |
| CN105769395B (en) * | 2016-04-12 | 2017-07-18 | 上海理工大学 | Electro-hydraulic damping cylinder structure for intelligent knee joint |
| CN206144898U (en) * | 2016-11-02 | 2017-05-03 | 中国石油大学(华东) | Novel hydraulic cylinder |
| CN106539633B (en) * | 2016-12-16 | 2018-06-26 | 上海理工大学 | For the straight push-plate type flow-rate adjustment damped cylinder of intelligent knee joint |
| CN106641071A (en) * | 2016-12-20 | 2017-05-10 | 上海工程技术大学 | Magnetorheological fluid inflatable vibration reducer |
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