CN113833714A - Bidirectional telescopic cylinder - Google Patents
Bidirectional telescopic cylinder Download PDFInfo
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- CN113833714A CN113833714A CN202111220620.2A CN202111220620A CN113833714A CN 113833714 A CN113833714 A CN 113833714A CN 202111220620 A CN202111220620 A CN 202111220620A CN 113833714 A CN113833714 A CN 113833714A
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- piston rod
- cylinder barrel
- main piston
- cylinder
- auxiliary piston
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- 230000002457 bidirectional effect Effects 0.000 title claims abstract description 21
- 238000000034 method Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000001174 ascending effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000003749 cleanliness Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
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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
- F15B15/1409—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
- 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
- F15B15/1433—End caps
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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
- F15B15/1457—Piston rods
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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
- F15B15/20—Other details, e.g. assembly with regulating devices
-
- 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
- F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
- F15B21/04—Special measures taken in connection with the properties of the fluid
- F15B21/048—Arrangements for compressed air preparation, e.g. comprising air driers, air condensers, filters, lubricators or pressure regulators
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Actuator (AREA)
Abstract
The invention provides a cylinder, and particularly relates to a bidirectional telescopic cylinder. The bidirectional telescopic cylinder comprises a cylinder barrel, a main piston rod, an auxiliary piston and an auxiliary piston rod, wherein the main piston is arranged in the cylinder barrel, the external load end of the main piston rod is positioned outside the cylinder barrel, the auxiliary piston is arranged in the cylinder barrel, the external load end of the auxiliary piston rod is positioned outside the cylinder barrel, the friction force between the second end of the cylinder barrel and the auxiliary piston rod is adjustable, an air inlet cavity is formed between the inner wall of the cylinder barrel and the main piston and between the inner wall of the cylinder barrel and the auxiliary piston, and an air inlet is formed in the cylinder barrel and communicated with the air inlet cavity. The working reliability of the bidirectional telescopic cylinder is greatly improved.
Description
Technical Field
The invention relates to a cylinder, in particular to a bidirectional telescopic cylinder.
Background
The existing cylinder products mostly adopt a single-piston-rod structure, some have a bidirectional telescopic function, and some have a unidirectional telescopic function, so that when the piston rod is blocked with the cylinder barrel or other parts due to the factors such as redundancy, size over-tolerance and the like, the cylinder completely loses functions, and even becomes an obstacle to the operation of the whole system. The above features limit the use of the cylinder.
Disclosure of Invention
The invention aims to provide a cylinder with higher working reliability.
In order to solve the above problems, the present invention provides a bidirectional telescopic cylinder,
comprises a cylinder barrel, a main piston rod, an auxiliary piston and an auxiliary piston rod, wherein one end of the main piston rod is an external load end, the other end of the main piston rod is connected with the main piston, one end of the auxiliary piston rod is an external load end, the other end of the auxiliary piston rod is connected with the auxiliary piston,
one end of the cylinder barrel is a main piston end, the other end of the cylinder barrel is an auxiliary piston end, the main piston end is a first end, the auxiliary piston end is a second end,
the main piston is arranged in the cylinder barrel, the external load end of the main piston rod is positioned outside the cylinder barrel, the first end of the cylinder barrel and the main piston rod are sealed with each other, the main piston rod is suitable for moving left and right relative to the cylinder barrel,
the auxiliary piston is arranged in the cylinder barrel, the external load end of the auxiliary piston rod is positioned outside the cylinder barrel, the auxiliary piston rod is suitable for moving left and right relative to the cylinder barrel, the second end of the cylinder barrel and the auxiliary piston rod are sealed with each other, the friction force between the second end of the cylinder barrel and the auxiliary piston rod is adjustable,
the main piston is close to the auxiliary piston in the cylinder barrel, an air inlet cavity is formed between the inner wall of the cylinder barrel and the main piston and between the inner wall of the cylinder barrel and the auxiliary piston, an air inlet is formed in the cylinder barrel, and the air inlet is communicated with the air inlet cavity.
Furthermore, joint bearings are arranged at the external load end of the main piston rod and the external load end of the auxiliary piston rod.
Further, a first limiting device is arranged at the external load end of the main piston rod, and when the main piston rod moves in place in the cylinder barrel, the first limiting device is clamped at the first end of the cylinder barrel.
Further, the first limiting device is a boss arranged on the outer wall of the main piston rod.
Furthermore, an exhaust cavity is formed in the space between the inner wall of the cylinder barrel and the outer wall of the main piston rod and between the first end of the cylinder barrel and the main piston, and an exhaust hole is formed in the exhaust cavity.
The exhaust device comprises a cylinder barrel, a main piston rod and an exhaust hole, wherein the cylinder barrel is provided with a main piston rod, the main piston rod is arranged in the cylinder barrel, the exhaust hole is arranged on the main piston rod, the upper cover is a tubular body, a first annular boss is arranged on the inner wall of the tubular body, the tubular body is sleeved at the first end part of the cylinder barrel, the first annular boss and the main piston rod are mutually attached, the cylinder barrel is mutually sealed through the upper cover and the main piston rod, the exhaust hole is arranged on the first annular boss, and the exhaust hole is L-shaped.
The piston rod assembly further comprises a lower cover which is an annular plate body sleeved on the auxiliary piston rod, a second annular boss is arranged on one side face, far away from the external load end of the auxiliary piston rod, of the annular plate body, the second annular boss is sleeved on the second end portion of the cylinder barrel, and the second end portion of the cylinder barrel is sealed with the auxiliary piston rod through the lower cover.
The piston rod assembly further comprises a pair of friction plates, the pair of friction plates form a ring body, the ring body is sleeved on the position, close to the external load end of the auxiliary piston rod, the friction plates are located on the outer side of the lower cover, the pair of friction plates are connected through a connecting fastener, and the tightening torque value of the connecting fastener is adjustable.
Furthermore, the friction plate is a group of brake pads, and the brake pads are connected to the lower cover through a plurality of mounting fasteners.
Further, a second limiting device is arranged at the external load end of the auxiliary piston rod, and when the auxiliary piston rod moves in place in the cylinder barrel, the second limiting device is clamped at the second end of the cylinder barrel.
Because the bidirectional telescopic cylinder is provided with the main piston rod and the auxiliary piston rod, the friction force between the second end of the cylinder barrel and the auxiliary piston rod is adjustable, and the two piston rods are redundant with each other, when one piston rod in the cylinder is blocked, the other piston rod still has bidirectional telescopic capacity, and the reliability of the whole work of the cylinder is greatly improved.
Drawings
FIG. 1 is a structural diagram of a bidirectional telescopic cylinder according to an embodiment of the present invention;
FIG. 2 is a view taken along line A of FIG. 1;
FIG. 3 is a schematic structural view of a main piston rod of a two-way telescopic cylinder extending out of a cylinder barrel according to an embodiment of the present invention;
FIG. 4 is a schematic structural view of a two-way telescopic cylinder according to an embodiment of the present invention, in which an auxiliary piston rod extends out of a cylinder barrel;
fig. 5 is a schematic structural view of the auxiliary piston rod of the bidirectional telescopic cylinder retracting into the cylinder barrel according to the embodiment of the invention.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.
The terms "upper", "lower", "front", "rear", "left" and "right" and the like appearing in the embodiments of the present invention indicate directions or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the device referred to must have a specific orientation, be constructed in a specific orientation and be operated, and thus, should not be construed as limiting the present invention.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; may be a mechanical connection; can be directly connected or indirectly connected through an intermediate medium; the specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
If there is a description of "first", "second", etc. in an embodiment of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated.
The two-way telescopic cylinder of the embodiment of the invention, as shown in fig. 1, fig. 2 and fig. 3, comprises a cylinder barrel 7, a main piston 61, a main piston rod 6, an auxiliary piston 91 and an auxiliary piston rod 9, wherein one end of the main piston rod 6 is an external load end, the other end is connected with the main piston 61, one end of the auxiliary piston rod 9 is an external load end, the other end is connected with the auxiliary piston 91,
one end of the cylinder barrel 7 is a main piston end, the other end is an auxiliary piston end, the main piston end is a first end, the auxiliary piston end is a second end,
the main piston 61 is arranged in the cylinder barrel 7, the external load end of the main piston rod 6 is positioned outside the cylinder barrel 7, the first end of the cylinder barrel 7 and the main piston rod 6 are sealed with each other, the main piston rod 6 is suitable for driving the main piston 61 to move left and right relative to the cylinder barrel 7, the external load end is used for connecting an external load, the main piston 61 is attached to the inner wall of the cylinder barrel 7, and a plurality of sealing rings are arranged between the main piston 61 and the cylinder barrel 7 to enable the main piston 61 and the cylinder barrel 7 to be sealed with each other,
the auxiliary piston 91 is arranged in the cylinder barrel 7, the external load end of the auxiliary piston rod 9 is positioned outside the cylinder barrel 7, the second end of the cylinder barrel 7 and the auxiliary piston rod 9 are sealed with each other, the external load end is used for connecting an external load, the main piston rod 6 and the auxiliary piston rod 9 in the cylinder barrel 7 can be contacted with each other and limited with each other, the auxiliary piston 91 is attached to the inner wall of the cylinder barrel 7, a plurality of sealing rings are arranged between the auxiliary piston 91 and the cylinder barrel 7 to enable the auxiliary piston 91 and the cylinder barrel 7 to be sealed with each other, the auxiliary piston rod 9 is suitable for driving the auxiliary piston 91 to move left and right relative to the cylinder barrel 7, the friction force between the second end of the cylinder barrel 7 and the auxiliary piston rod 9 is adjustable, when the bidirectional telescopic cylinder works normally, only the main piston rod 6 acts, at the friction force between the second end of the cylinder barrel 7 and the auxiliary piston rod 9 is increased, the action of the auxiliary piston rod 9 is avoided, when the main piston rod 6 is blocked, the friction force between the second end of the cylinder barrel 7 and the auxiliary piston rod 9 is reduced, so that the auxiliary piston rod 9 acts,
the main piston 61 is close to the auxiliary piston 91 in the cylinder 7, an air inlet cavity 71 is formed between the inner wall of the cylinder 7 and the main piston 61 and the auxiliary piston 91, an air inlet is arranged on the cylinder 7, an air supply connecting pipe 8 is arranged on the air inlet, the air inlet is communicated with the air inlet cavity 71, and air with certain pressure is input into the air inlet cavity 71 through the air inlet. Specifically, the sub piston 91 is disposed in the middle of the sub piston rod 9, the main piston 61 is disposed at the end of the main piston rod 6, and when the sub piston rod 9 contacts the main piston 61, an intake chamber 71 is formed between the inner wall of the cylinder tube 7 and the main piston 61 and the sub piston 91. When the bidirectional telescopic cylinder works normally, pressurized gas input into the air inlet cavity 71 drives the main piston rod 6 to extend out, so that the cylinder generates an outward output acting force, when the main piston rod 6 is clamped, the friction force between the second end of the cylinder barrel 7 and the auxiliary piston rod 9 is reduced, and the pressurized gas input into the air inlet cavity 71 drives the auxiliary piston rod 9 to extend out, so that the cylinder generates an outward output acting force. Namely, the bidirectional telescopic cylinder is provided with the main piston rod 6 and the auxiliary piston rod 9, and the friction force between the second end of the cylinder tube 7 and the auxiliary piston rod 9 is adjustable, so that the two piston rods are redundant with each other, when one piston rod in the cylinder is blocked, the other piston rod still has bidirectional telescopic capacity, and the reliability of the whole work of the cylinder is greatly improved.
Optionally, the outer load end of the main piston rod 6 and the outer load end of the auxiliary piston rod 9 are both provided with a joint bearing 1, and the joint bearing 1 is used for connecting an outer load. Because the main piston rod 6 and the auxiliary piston rod 9 are both connected with the external load through the joint bearing 1, when the external load deflects relative to the axis of the cylinder barrel, the joint bearing 1 can automatically adapt, so that the cylinder can better adapt to the change of the external load.
Optionally, the first limiting device 21 is disposed at an external load end of the main piston rod 6, when the main piston rod 6 moves in place in the cylinder tube 7, the first limiting device 21 is clamped at the first end of the cylinder tube 7, and the first limiting device 21 is disposed to prevent the main piston rod 6 from being out of position during the moving process.
Optionally, the first limiting device 21 is a boss disposed on an outer wall of the main piston rod 6, and specifically, the first limiting device 21 is a nut connected to the main piston rod 6.
Optionally, a part of a space between the inner wall of the cylinder 7 and the outer wall of the main piston rod 6, which is located between the first end of the cylinder 7 and the main piston 61, forms an exhaust cavity 73, an exhaust hole 72 is opened in the exhaust cavity 73, and a filter 3 is disposed on the exhaust hole 72. The arrangement of the exhaust hole 72 can avoid the pressure build-up between the main piston 61 and the cylinder barrel 7 in the process that the main piston rod 6 extends out of the cylinder barrel 7, and meanwhile, the filter 3 is arranged at the exhaust hole 72 to prevent sundries from entering the cylinder barrel 7.
Optionally, the exhaust device further comprises an upper cover 4, the upper cover 4 is a tubular body, a first annular boss is arranged on the inner wall of the tubular body, the tubular body is sleeved at a first end portion of the cylinder barrel 7, the first annular boss and the main piston rod 6 are attached to each other, the cylinder barrel 7 is sealed with the main piston rod 6 through the upper cover 4, the exhaust hole 72 is formed in the first annular boss, and the exhaust hole 72 is in an L shape. Specifically, the upper cover 4 and the cylinder tube 7 are connected with each other by a screw thread, and the lock nut 51 is locked at the end of the upper cover 4 to position and fasten the upper cover 4.
Optionally, the cylinder barrel further comprises a lower cover 10, the lower cover 10 is an annular plate body sleeved on the auxiliary piston rod 9, a second annular boss 101 is arranged on one side surface of the annular plate body, which is far away from the external load end of the auxiliary piston rod 9, the second annular boss 101 on the annular plate body is sleeved on the second end portion of the cylinder barrel 7, and the second end portion of the cylinder barrel 7 is sealed with the auxiliary piston rod 9 through the lower cover 10. Specifically, the second annular boss 101 and the cylinder tube 7 are connected to each other by a screw, and the lock nut 52 is locked at the end of the second annular boss 101 to position and fasten the lower cover 10.
Optionally, the friction device further comprises a pair of friction plates 11, the pair of friction plates 11 are annularly sleeved on the position, close to the external load end of the auxiliary piston rod 9, the friction plates 11 are located on the outer side of the lower cover 10, the pair of friction plates 11 are connected through a connecting fastener 111, the tightening torque value of the connecting fastener 111 is adjustable, the larger the tightening torque value of the connecting fastener 111 is, the larger the friction force generated by the friction plates 11 on the auxiliary piston rod 9 is, the smaller the tightening torque is, the smaller the friction force generated by the friction plates 11 on the auxiliary piston rod 9 is, and the friction force between the auxiliary piston rod 9 and the cylinder barrel 7 is adjusted through the friction plates 11.
Specifically, the friction plate 11 is a set of brake pads that are attached to the lower cover 10 by a plurality of mounting fasteners. Specifically, the mounting fastener is a bolt.
Optionally, the external load end of the secondary piston rod 9 is provided with a second stop means 22, and when the secondary piston rod 9 moves in place within the cylinder tube 7, the second stop means 22 catches on the second end of the cylinder tube 7. In particular, the second limiting means 22 is a nut connected to the secondary piston rod 9.
As shown in fig. 3, 4 and 5, the working process of the bidirectional telescopic cylinder of the invention is as follows:
when the cylinder is required to normally rise along with the external load, gas with certain pressure is provided for the air inlet cavity 71 in the cylinder barrel 7 through the opening A of the air supply filler neck 8, the pressurized gas drives the main piston rod 6 to extend out, and therefore constant acting force is always generated between the main piston rod 6 and the external load. Along with the rise of the external load, the pressurized gas drives the main piston rod 6 to extend out of the cylinder to rise along with the rise of the external load, meanwhile, the gas in the exhaust cavity 73 is exhausted out of the cylinder barrel 7 through the exhaust hole 72, the pressure in the cylinder barrel 7 is prevented from being held, and the extending state of the main piston rod 6 is shown in figure 3;
when the cylinder is required to normally descend along with an external load, gas with certain pressure is provided for the air inlet cavity 71 in the cylinder barrel 7 through the port A, the main piston rod 6 retracts into the cylinder along with the descent of the external load, meanwhile, air in the environment enters the air inlet cavity 71 through the exhaust hole 72, the air is filtered by the filter 3, excess materials are prevented from entering the cylinder barrel 7, the cleanliness in the cylinder barrel 7 is ensured, and the retraction state of the main piston rod 6 is shown in figure 1;
when the main piston rod 6 and the cylinder barrel 7 or the upper cover 4 cannot move linearly, namely a clamping stagnation fault occurs, and the cylinder is required to ascend along with an external load, the cylinder starts a redundancy ascending working mode. Similarly, gas with a certain pressure is firstly provided to the air inlet cavity 71 in the cylinder barrel 7 through the port A, and the pressurized gas drives the auxiliary piston rod 9 to overcome the friction force of the friction plate 11 and extend out, so that constant acting force is always applied between the auxiliary piston rod 9 and an external load. Along with the rise of the external load, the pressurized gas drives the auxiliary piston rod 9 to extend out of the cylinder, the cylinder barrel 7 and the main piston rod 6 rise along with the rise of the external load, and the extending state of the auxiliary piston rod 9 is shown in figure 4;
when the clamping stagnation fault also occurs and the cylinder is required to descend along with the external load, the cylinder starts a redundancy descending working mode. Similarly, gas with certain pressure is firstly provided for the air inlet cavity 71 in the cylinder barrel 7 through the port A, the cylinder barrel 7 and the main piston rod 6 descend along with the external load, which is equivalent to the retraction of the auxiliary piston rod 9 into the cylinder, and the retraction state of the auxiliary piston rod 9 is shown in FIG. 5;
when the friction force value of the friction plate 11 to the auxiliary piston rod 9 needs to be adjusted, the tightening torque value of the connecting fastener can be adjusted quantitatively. The larger the tightening torque of the connection fastener is, the larger the frictional force generated on the sub-piston rod 9 is, and the smaller the tightening torque is, the smaller the frictional force is.
Although the present disclosure has been described above, the scope of the present disclosure is not limited thereto. Various changes and modifications may be effected therein by one of ordinary skill in the pertinent art without departing from the spirit and scope of the present disclosure, and these changes and modifications are intended to be within the scope of the present disclosure.
Claims (10)
1. A bidirectional telescopic cylinder is characterized in that,
comprises a cylinder barrel (7), a main piston (61), a main piston rod (6), an auxiliary piston (91) and an auxiliary piston rod (9), wherein one end of the main piston rod (6) is an external load end, the other end of the main piston rod is connected with the main piston (61), one end of the auxiliary piston rod (9) is an external load end, the other end of the auxiliary piston rod is connected with the auxiliary piston (91),
one end of the cylinder barrel (7) is a main piston end, the other end is an auxiliary piston end, the main piston end is a first end, the auxiliary piston end is a second end,
the main piston (61) is arranged in the cylinder barrel (7), the external load end of the main piston rod (6) is positioned outside the cylinder barrel (7), the first end of the cylinder barrel (7) and the main piston rod (6) are sealed with each other, the main piston rod (6) is suitable for moving left and right relative to the cylinder barrel (7),
the auxiliary piston (91) is arranged in the cylinder barrel (7), the external load end of the auxiliary piston rod (9) is positioned outside the cylinder barrel (7), the auxiliary piston rod (9) is suitable for moving left and right relative to the cylinder barrel (7), the second end of the cylinder barrel (7) and the auxiliary piston rod (9) are sealed with each other, the friction force between the second end of the cylinder barrel (7) and the auxiliary piston rod (9) is adjustable,
the main piston (61) is close to the auxiliary piston (91) in the cylinder barrel, an air inlet cavity (71) is formed between the inner wall of the cylinder barrel (7) and the main piston (61) and the auxiliary piston (91), an air inlet is formed in the cylinder barrel (7), and the air inlet is communicated with the air inlet cavity (71).
2. A bi-directional telescopic cylinder according to claim 1, characterized in that the outer load end of the main piston rod (6) and the outer load end of the secondary piston rod (9) are provided with a joint bearing (1).
3. A bi-directional telescopic cylinder according to claim 2, characterised in that the outer load end of the main piston rod (6) is provided with a first stop means (21), the first stop means (21) catching on the first end of the cylinder barrel (7) when the main piston rod (6) is moved into position within the cylinder barrel (7).
4. A bi-directional telescopic cylinder according to claim 3, characterised in that the first stop means (21) is a boss provided on the outer wall of the main piston rod (6).
5. The cylinder according to claim 4, wherein a portion of a space between the inner wall of the cylinder (7) and the outer wall of the main piston rod (6) between the first end of the cylinder (7) and the main piston (61) forms an exhaust chamber (73), and the exhaust chamber (73) is provided with an exhaust hole (72).
6. The bidirectional telescopic cylinder according to claim 5, further comprising an upper cover (4), wherein the upper cover (4) is a tubular body, a first annular boss is arranged on the inner wall of the tubular body, the tubular body is sleeved on the first end portion of the cylinder barrel (7), the first annular boss and the main piston rod (6) are attached to each other, the cylinder barrel (7) and the main piston rod (6) are sealed with each other through the upper cover (4), the exhaust hole (72) is formed in the first annular boss, and the exhaust hole (72) is L-shaped.
7. The bidirectional telescopic cylinder according to claim 6, further comprising a lower cover (10), wherein the lower cover (10) is an annular plate body sleeved on the auxiliary piston rod (9), a side surface of the annular plate body, which is far away from the external load end of the auxiliary piston rod (9), is provided with a second annular boss, the second annular boss is sleeved on the second end portion of the cylinder barrel (7), and the second end portion of the cylinder barrel (7) is sealed with the auxiliary piston rod (9) through the lower cover (10).
8. The bidirectional telescopic cylinder of claim 7, further comprising a pair of friction plates (11), wherein the pair of friction plates (11) are formed into an annular body and sleeved on the secondary piston rod (9) at a position close to an external load end of the secondary piston rod (9), the friction plates (11) are positioned on the outer side of the lower cover (10), the pair of friction plates (11) are connected through a connecting fastener (111), and the tightening torque value of the connecting fastener (111) is adjustable.
9. A bi-directional telescopic cylinder according to claim 8, characterised in that the friction plate (11) is a set of brake pads which are attached to the lower cover (10) by means of a plurality of mounting fasteners.
10. A bi-directional telescopic cylinder according to claim 9, characterised in that the outer load end of the secondary piston rod (9) is provided with a second stop means (22), the second stop means (22) catching on the second end of the cylinder barrel (7) when the secondary piston rod (9) is moved into position within the cylinder barrel (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111220620.2A CN113833714A (en) | 2021-10-20 | 2021-10-20 | Bidirectional telescopic cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111220620.2A CN113833714A (en) | 2021-10-20 | 2021-10-20 | Bidirectional telescopic cylinder |
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| Publication Number | Publication Date |
|---|---|
| CN113833714A true CN113833714A (en) | 2021-12-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111220620.2A Pending CN113833714A (en) | 2021-10-20 | 2021-10-20 | Bidirectional telescopic cylinder |
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| CN (1) | CN113833714A (en) |
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| CN205918692U (en) * | 2016-08-31 | 2017-02-01 | 山东泰丰液压股份有限公司 | Quick type double -acting cylinder |
| CN208123154U (en) * | 2018-01-31 | 2018-11-20 | 新昌县城关利业机械厂 | A kind of novel bidirectional operation type oil cylinder |
| CN208966927U (en) * | 2018-11-08 | 2019-06-11 | 黄海造船有限公司 | A kind of fishing boat stern tube shaft brake apparatus |
-
2021
- 2021-10-20 CN CN202111220620.2A patent/CN113833714A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
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| FR2389426A1 (en) * | 1977-05-07 | 1978-12-01 | Haegermann Helmut | |
| CN202545414U (en) * | 2012-02-29 | 2012-11-21 | 成都市新筑路桥机械股份有限公司 | Automatic concrete piston retreating buffer throttling device for pumping oil cylinder |
| CN104609330A (en) * | 2015-01-21 | 2015-05-13 | 巨隆液压设备(集团)有限公司 | Bidirectional hydraulic jack |
| CN205918692U (en) * | 2016-08-31 | 2017-02-01 | 山东泰丰液压股份有限公司 | Quick type double -acting cylinder |
| CN208123154U (en) * | 2018-01-31 | 2018-11-20 | 新昌县城关利业机械厂 | A kind of novel bidirectional operation type oil cylinder |
| CN208966927U (en) * | 2018-11-08 | 2019-06-11 | 黄海造船有限公司 | A kind of fishing boat stern tube shaft brake apparatus |
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Application publication date: 20211224 |
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