CN113503287A - Double-cylinder barrel symmetric double-piston hydraulic cylinder without cylinder cover - Google Patents
Double-cylinder barrel symmetric double-piston hydraulic cylinder without cylinder cover Download PDFInfo
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- CN113503287A CN113503287A CN202110745605.3A CN202110745605A CN113503287A CN 113503287 A CN113503287 A CN 113503287A CN 202110745605 A CN202110745605 A CN 202110745605A CN 113503287 A CN113503287 A CN 113503287A
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- 238000007789 sealing Methods 0.000 claims description 28
- 230000003139 buffering effect Effects 0.000 claims description 12
- 230000002146 bilateral effect Effects 0.000 claims description 6
- 239000000428 dust Substances 0.000 claims description 5
- 238000000926 separation method Methods 0.000 claims description 3
- 235000017166 Bambusa arundinacea Nutrition 0.000 claims 1
- 235000017491 Bambusa tulda Nutrition 0.000 claims 1
- 241001330002 Bambuseae Species 0.000 claims 1
- 235000015334 Phyllostachys viridis Nutrition 0.000 claims 1
- 239000011425 bamboo Substances 0.000 claims 1
- 238000009434 installation Methods 0.000 abstract description 10
- 239000003921 oil Substances 0.000 description 100
- 239000010720 hydraulic oil Substances 0.000 description 9
- 229910000831 Steel Inorganic materials 0.000 description 4
- 239000010959 steel Substances 0.000 description 4
- 230000006378 damage Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 238000003466 welding Methods 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
- F15B15/17—Characterised by the construction of the motor unit of the straight-cylinder type of differential-piston type
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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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/08—Characterised by the construction of the motor unit
- F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
- F15B15/1423—Component parts; Constructional details
- F15B15/1428—Cylinders
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/08—Characterised by the construction of the motor unit
- F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
- F15B15/1423—Component parts; Constructional details
- F15B15/1447—Pistons; Piston to piston rod assemblies
- F15B15/1452—Piston sealings
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/08—Characterised by the construction of the motor unit
- F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
- F15B15/1423—Component parts; Constructional details
- F15B15/1457—Piston rods
- F15B15/1461—Piston rod sealings
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/20—Other details, e.g. assembly with regulating devices
- F15B15/22—Other details, e.g. assembly with regulating devices for accelerating or decelerating the stroke
Abstract
The invention discloses a cylinder-cover-free double-cylinder symmetrical double-piston hydraulic cylinder which comprises an oil cavity separator with a hollow structure, wherein two ends of the oil cavity separator are respectively provided with a cylinder barrel fixedly sleeved with the oil cavity separator, pistons are arranged in the cylinder barrels at the two ends and reciprocate linearly along the axis direction of the cylinder barrel, the pistons, the cylinder barrel and the oil cavity separator at the same side form an oil cavity, a piston rod with the length smaller than that of the whole hydraulic cylinder is arranged in the cylinder barrel and the oil cavity separator, the piston rod reciprocates along the axis of the cylinder barrel and the oil cavity separator, the piston rod is of a bilaterally symmetrical structure, the two pistons are symmetrically installed and fixed at the end part of the piston rod, and each cylinder barrel is fixedly arranged on a supporting seat. The invention solves the problems that the existing hydraulic cylinder is difficult to arrange in a narrow space and the stress condition of the hydraulic cylinder is not good due to the fixed installation mode of the piston rod, improves the space utilization rate of products using the hydraulic cylinder and prolongs the service life of the whole products.
Description
Technical Field
The invention relates to the field of hydraulic cylinders, in particular to a double-cylinder-barrel symmetric double-piston hydraulic cylinder without a cylinder cover.
Background
The hydraulic cylinder is a hydraulic actuator which converts hydraulic energy into mechanical energy and realizes reciprocating linear motion or reciprocating swing. The hydraulic cylinders are classified according to structural forms and can be divided into piston type, plunger type, multi-stage telescopic sleeve type, gear rack type and the like. At present, two main mounting means of play pole piston pneumatic cylinder have the fixed two kinds of with the piston rod of cylinder, when using the fixed installation pneumatic cylinder of cylinder, the required working space of pneumatic cylinder is three times of the effective stroke of piston, occupation space is very big, when using the fixed installation pneumatic cylinder of piston rod, the required working space of pneumatic cylinder is twice of the effective stroke of piston, axial space has been saved, nevertheless because need be at cylinder radial connection load, make and occupy certain space in the radial direction of pneumatic cylinder, it has great difficulty to arrange the pneumatic cylinder under narrow space, and under most of the circumstances, the cylinder receives external force direction and does not coincide with the cylinder axis, make the pneumatic cylinder bear outside moment, thereby easily cause abnormal sound, creep, the oil leak, the structure destruction scheduling problem even.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a double-cylinder symmetric double-piston hydraulic cylinder without a cylinder cover, which solves the problems that the existing hydraulic cylinder is difficult to arrange in a narrow space and the stress condition of the hydraulic cylinder is not good due to a fixed installation mode of a piston rod, improves the space utilization rate of a product using the hydraulic cylinder and prolongs the service life of the whole product.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows: the two ends of the oil cavity separator are respectively provided with a cylinder barrel fixedly fastened with the oil cavity separator sleeve, the two ends of the oil cavity separator are respectively provided with a piston and a piston which reciprocate linearly along the axis direction of the cylinder barrel, the piston, the cylinder barrel and the oil cavity separator form an oil cavity on the same side, a piston rod and a piston rod which are arranged in the cylinder barrel and the oil cavity separator and have the length smaller than the length of the whole hydraulic cylinder are arranged in the cylinder barrel and the oil cavity separator and move back and forth along the axis of the cylinder barrel and the oil cavity separator, the piston rod is of a bilateral symmetry structure, the two pistons are symmetrically installed and fixed at the end parts of the piston rods, and the cylinder barrel is fixedly arranged on a supporting seat.
The technical scheme of the invention is further improved as follows: one end of the cylinder barrel is provided with an internal thread which is used for being fixedly connected with the oil cavity separator, the other end of the cylinder barrel is communicated with the outside, the outer ring of the cylinder barrel is provided with a supporting seat mounting groove which is used for being mounted and matched with a supporting seat, the two cylinder barrels are tightly mounted at two ends of the oil cavity separator through thread sleeves respectively, and the axis of the oil cavity separator is overlapped with the axis of the cylinder barrel after mounting.
The technical scheme of the invention is further improved as follows: the piston is characterized in that a dustproof ring groove used for installing a dustproof ring is formed in an outer ring close to the outer end face of the piston, a support ring groove used for installing a support ring is formed in an outer ring close to the dustproof ring groove, a seal ring groove used for installing a seal ring is formed in an outer ring close to the support ring groove, a piston buffer structure and a piston buffer structure are arranged at the rear end of the piston and face towards an oil cavity separator, the piston is of a hollow structure, and a hole used for installing and fixing a piston rod and an annular positioning step face are formed in the hole in the piston along the axis direction of the piston.
The technical scheme of the invention is further improved as follows: the oil cavity separator is provided with a bilateral symmetry structure, external threads matched with the internal threads of the cylinder barrel are arranged at two ends of the oil cavity separator, hole sealing ring grooves used for installing sealing rings are formed in the matching surface of the oil cavity separator and the cylinder barrel at the two ends of the oil cavity separator, holes matched with the piston rod and capable of limiting the degree of freedom of the piston rod are formed in the oil cavity separator along the axis direction of the oil cavity separator, shaft sealing ring grooves used for installing the oil cavity separation sealing rings and piston rod supporting ring grooves used for installing supporting rings are formed in the matching surface of the oil cavity separator and the piston rod of the oil cavity separator, two oil ports for communicating two oil cavities of the hydraulic cylinder with the outside are formed in the radial direction of the oil cavity separator, the two oil ports are respectively arranged at two sides of the shaft sealing ring grooves, and piston limiting surfaces used for limiting the movement limit position of the piston are arranged at two ends of the oil cavity separator, and two ends of the oil cavity separator are provided with oil cavity separator buffering structures, and the piston buffering structure and the oil cavity separator buffering structures are matched to form a hydraulic cylinder buffering device.
The technical scheme of the invention is further improved as follows: the outer groove that is used for installing the card key with fixed piston is seted up at the both ends of piston rod, the outer terminal surface of piston offsets with the card key that sets up on the piston rod and leans on, the piston rod is opened on the fitting surface of piston rod and piston and is had the sealing washer slot that is used for installing the sealing washer, be provided with piston rod annular location step face and annular location step face on the piston rod and support with piston rod annular location step face and lean on, the outside load connecting hole that is used for connecting the outside load is opened to piston rod both ends face.
The technical scheme of the invention is further improved as follows: the supporting seat comprises an upper supporting seat and a lower supporting seat, the upper supporting seat and the lower supporting seat are fixedly connected through screws, the upper supporting seat and the lower supporting seat are combined to form a mounting hole matched with the supporting seat mounting groove, the two end faces of the supporting seat abut against the annular positioning step surface on the supporting seat mounting groove, and a device for preventing the circumferential rotation of the hydraulic cylinder is arranged between the supporting seat and the cylinder barrel.
The technical scheme of the invention is further improved as follows: and mounting holes are formed in the two ends of the lower supporting seat, and the whole hydraulic cylinder is fixed on a hydraulic cylinder mounting surface using the hydraulic cylinder product through the mounting holes.
Due to the adoption of the technical scheme, the invention has the technical progress that:
1. the invention provides a double-cylinder symmetrical double-piston hydraulic cylinder without a cylinder cover, wherein a piston rod which can reciprocate and has a length smaller than that of the whole hydraulic cylinder is arranged in a cylinder barrel and an oil cavity separator, one end of the cylinder barrel is tightly sleeved with the oil cavity separator, the other end of the cylinder barrel is communicated with the outside, two symmetrically arranged pistons capable of reciprocating in the two cylinder barrels are fixedly arranged at the two ends of the piston rod, so that two oil cavities are formed at the two ends of the oil cavity separator, one oil cavity inputs hydraulic oil, the other oil cavity discharges the hydraulic oil, the reciprocating movement of the piston rod and the piston in the hydraulic cylinder is realized, two ends of the piston rod are connected with an external load through a steel wire rope/chain, one end of the cylinder barrel is communicated with the outside, and the steel wire rope or the chain can enter the cylinder barrel along with the piston rod, so that the working space required by the hydraulic cylinder is greatly reduced, and the defect that the hydraulic cylinder is difficult to arrange under the condition of limited space is overcome;
2. the invention is directly connected and fixed with the piston rod through the external load, thereby causing the external force direction borne by the hydraulic cylinder to coincide with the axis of the hydraulic cylinder, improving the stress environment of the hydraulic cylinder and greatly prolonging the service life of the hydraulic cylinder;
3. all parts of the hydraulic cylinder are fixed by using threaded sleeves, so that the hydraulic cylinder is convenient to disassemble and assemble, the welding of the hydraulic cylinder is avoided, the production safety of the hydraulic cylinder is improved, and the practicability is strong.
Drawings
FIG. 1 is an overall schematic view of a double-cylinder symmetric double-piston hydraulic cylinder without a cylinder cover according to the present invention;
FIG. 2 is a schematic structural view of the oil chamber divider of the present invention;
FIG. 3 is a schematic view of the piston of the present invention;
FIG. 4 is a schematic structural view of a piston rod according to the present invention;
FIG. 5 is a schematic view of the cylinder barrel of the present invention;
FIG. 6 is a schematic structural view of the support base of the present invention;
wherein, 1, a cylinder barrel; 1-1, a supporting seat mounting groove; 1-2, internal threads; 2. a piston; 2-1, a dustproof ring groove; 2-2, sealing ring grooves; 2-3, piston support ring grooves; 2-4, a piston buffer structure; 2-5, annularly positioning a step surface of the piston; 3. an oil chamber divider; 3-1, external threads; 3-2, sealing ring grooves for holes; 3-3, oil ports; 3-4, sealing ring grooves for the shaft; 3-5, a piston rod support ring groove; 3-6, an oil cavity divider buffer structure; 3-7, a piston limiting surface; 4. a piston rod; 4-1, a groove; 4-2, sealing ring grooves; 4-3, a piston rod annular positioning step surface; 4-4, connecting holes for external load; 5. a supporting seat; 6. an upper support base; 7. a lower support seat; 7-1 and mounting holes.
Detailed Description
The present invention will be described in further detail with reference to the following examples:
as shown in fig. 1, a cylinder-cover-free double-cylinder symmetric double-piston hydraulic cylinder comprises an oil cavity separator 3 with a hollow structure, wherein two ends of the oil cavity separator 3 are respectively provided with a cylinder barrel 1 fixedly sleeved with the oil cavity separator 3, two ends of the oil cavity separator 3 are respectively provided with a piston 2 in the cylinder barrel 1, the piston 2 reciprocates along the axis direction of the cylinder barrel 1, an oil cavity is formed by the piston 2, the cylinder barrel 1 and the oil cavity separator 3 on the same side, a piston rod 4 with the length smaller than the length of the whole hydraulic cylinder is arranged in the cylinder barrel 1 and the oil cavity separator 3, the piston rod 4 reciprocates along the axis of the cylinder barrel 1 and the oil cavity separator 3, the piston rod 4 has a bilateral symmetric structure, the two pistons 2 are symmetrically arranged and fixed at the end of the piston rod 4, and each cylinder barrel 1 is fixedly arranged on a support base 5.
According to the invention, the piston rod 4 which can move in a reciprocating manner and is shorter than the whole hydraulic cylinder is arranged in the cylinder barrel 1 and the oil cavity separator 3, one end of the piston rod 4 is tightly sleeved with the oil cavity separator 3, the other end of the piston rod 1 is communicated with the outside, two pistons 2 which are symmetrically arranged and can move in two cylinder barrels 1 in a reciprocating manner are fixedly arranged at two ends of the piston rod 4, and then two oil cavities are formed at two ends of the oil cavity separator 3, wherein one oil cavity is used for inputting hydraulic oil, and the other oil cavity is used for discharging the hydraulic oil, so that the piston rod 4 and the piston 2 can move in the hydraulic cylinder 1 in a reciprocating manner, two ends of the piston rod 4 are connected with an external load through a steel wire rope/chain, and the steel wire rope or the chain can enter the cylinder barrel 1 along with the piston rod 4, thereby greatly reducing the working space required by the hydraulic cylinder, and overcoming the defect that the hydraulic cylinder is difficult to arrange under the condition of limited space; the external load is directly connected and fixed with the piston rod 4, so that the direction of the external force applied to the hydraulic cylinder is coincided with the axis of the hydraulic cylinder, the stress environment of the hydraulic cylinder is improved, and the service life of the hydraulic cylinder is greatly prolonged; each part of the hydraulic cylinder is fixed by using a threaded sleeve, so that the hydraulic cylinder is convenient to disassemble and assemble, the hydraulic cylinder is prevented from being welded, the production safety of the hydraulic cylinder is improved, and the practicability is strong.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
As shown in fig. 1, 2 and 5, the oil chamber divider 3 has a bilateral symmetry structure, two ends of the oil chamber divider are provided with external threads 3-1, one end of the cylinder barrel 1 is provided with internal threads 1-2 matched with the external threads 3-1 at one end of the oil chamber divider 3, the two cylinder barrels 1 are tightly mounted at the two ends of the oil chamber divider 3 through thread sleeves respectively, the axis of the mounted oil chamber divider 3 is overlapped with the axis of the cylinder barrel 1, and the threads have anti-loosening treatment so as to prevent the threads from loosening under an impact vibration environment and prevent the hydraulic cylinder from being damaged to cause danger. On the mating surface of the oil chamber divider 3 and the cylinder 1, the oil chamber divider 3 is provided with a seal ring groove 3-2 for a hole to mount a seal ring for preventing leakage of hydraulic oil. The oil chamber divider 3 has a hollow structure, and a hole for engaging with the piston rod 4 is formed inside the oil chamber divider 3 in the axial direction of the oil chamber divider 3 to restrict the freedom of the piston rod 4 so that the piston rod 4 can move only in the axial direction of the oil chamber divider 3 and rotate around the axis of the oil chamber divider 3. On the matching surface of the oil cavity separator 3 and the piston rod 4, the oil cavity separator 3 is provided with a shaft seal ring groove 3-4 for installing an oil cavity separation seal ring to prevent the internal leakage of the hydraulic cylinder, and on the matching surface, the oil cavity separator 3 is also provided with a piston rod support ring groove 3-5 for installing a support ring to prevent the piston rod 4 from directly contacting and rubbing with the oil cavity separator 3 in the movement process. The oil cavity separator 3 is provided with two oil ports 3-3 in the radial direction, the two oil ports 3-3 are respectively arranged at two sides of a shaft seal ring groove 3-4, and the two oil ports 3-3 respectively communicate the two oil cavities of the hydraulic cylinder with the outside, so that an external oil source can input hydraulic oil into the oil cavity of the hydraulic cylinder or discharge the hydraulic oil in the hydraulic cylinder. And piston limiting surfaces 3-7 are arranged at two ends of the oil cavity separator 3 to limit the movement limit position of the piston and prevent the piston from moving to the oil port position and blocking the oil port. Oil chamber divider cushions 3-6 are provided at both ends of the oil chamber divider 3 to form a cushion with the piston 2, preventing hydraulic shock and noise, even damage to the entire apparatus and components, when the piston is about to move to the end point near the oil chamber divider 3.
Further, as shown in fig. 1, fig. 3, and fig. 4, there are two pistons 2, which are respectively disposed in the two cylinders 1 and can move along the axis of the cylinders 1, and the outer ring of the piston 2 is provided with a support ring groove 2-2 for installing the support ring, so as to prevent the piston 2 from directly contacting and rubbing the cylinders 1 during the movement. The outer ring of the piston 2 is provided with a sealing ring groove 2-3 for installing a sealing ring to prevent hydraulic oil from leaking, and the piston 2, the cylinder barrel 1 and the oil cavity separator 3 on the same side form an oil cavity. And a dustproof ring groove 2-1 is formed in the outer ring of the piston, which is close to the outer end face of the piston 2, and is used for installing a dustproof ring to prevent external pollutants from entering the hydraulic cylinder and polluting oil. The rear end of the piston 2 is provided with a piston buffering structure 2-4 which can be matched with an oil cavity separator buffering structure 3-6 on the oil cavity separator 3 to form a hydraulic cylinder buffering device, so that hydraulic impact and noise are prevented when the piston 2 is about to move to the end point to be close to the oil cavity separator 3, and even the whole device and components are damaged. The piston 2 is of a hollow structure, a hole is formed in the piston 2 along the axial direction of the piston for installing and fixing the piston rod 4, an annular positioning step surface 2-5 in the hole is abutted against a piston rod annular positioning step surface 4-3 on the piston rod 4, the outer end surface of the piston 2 is abutted against a nut or a clamping key arranged on the piston rod 4, the two pistons 2 are symmetrically installed and fixed on the piston rod 4, and the piston buffer structure 2-4 faces the oil cavity separator 3. On the matching surface of the piston rod 4 and the piston 2, a sealing ring groove 4-2 is formed on the piston rod 4 and used for installing a sealing ring to prevent hydraulic oil from leaking.
Further, as shown in fig. 1 and 4, the piston rod 4 has a bilaterally symmetrical structure, and the piston rod 4 is reciprocally movable along the axis of the cylinder tube 1 and the oil chamber divider 3 in the cylinder tube 1 and the oil chamber divider 3. The two ends of the piston rod 4 are provided with outer grooves 4-1 for installing clamping keys to fix the piston 2, in practical application, the clamping keys can be replaced by nuts, and correspondingly, the two ends of the piston rod 4 are provided with outer threads for installing nuts to fix the piston 2. And two end surfaces of the piston rod 4 are provided with external load connecting holes 4-4 for connecting external loads.
Further, as shown in fig. 5, one end of the cylinder barrel 1 is provided with an internal thread 1-2 for connecting and fixing with the oil cavity separator 3, and the other end of the cylinder barrel is communicated with the outside, so that the piston rod 4 can be conveniently connected with an external load, the cylinder barrel is also used for placing the piston 2 and the piston rod 4 during the assembly of the hydraulic cylinder, and the outer ring of the cylinder barrel 1 is provided with a supporting seat installation groove 1-1 for installing and matching with the supporting seat 5.
Further, as shown in fig. 6, there are two support seats 5 respectively disposed on the two cylinders 1, the support seat 5 includes two parts, namely an upper support seat 6 and a lower support seat 7, and the upper support seat 6 and the lower support seat 7 are fixed by screw connection. The upper supporting seat 6 and the lower supporting seat 7 are combined to form a mounting hole matched with the supporting seat mounting groove 1-1 on the cylinder barrel 1, two end faces of the supporting seat 5 are abutted against annular positioning step faces on the supporting seat mounting groove 1-1 on the cylinder barrel 1, and a device for preventing the circumferential rotation of the hydraulic cylinder is arranged between the supporting seat 5 and the cylinder barrel 1. The lower support seat 7 is provided with a mounting hole 7-1, and the whole hydraulic cylinder is fixed on a hydraulic cylinder mounting surface using the hydraulic cylinder product through the mounting hole 7-1.
The following description of the present embodiment specifically includes the following steps:
the method comprises the following steps: installing matched sealing rings in a sealing ring groove 3-2 for a hole and a sealing ring groove 3-4 for a shaft of the oil chamber separator 3, and installing a matched piston rod support ring in a piston rod support ring groove 3-5 of the oil chamber separator 3;
step two: screwing the two cylinder barrels 1 into two ends of the oil cavity separator 3 respectively by using a special tool until the rear end surface of the cylinder barrel 1 presses the oil cavity separator 3 tightly, and implementing a thread anti-loosening measure;
step three: installing matched sealing rings in sealing ring grooves 4-2 at two ends of a piston rod 4, and respectively installing the sealing rings, a piston support ring and a dust ring in the sealing ring grooves 2-2, the piston support ring grooves 2-3 and the dust ring grooves 2-1 corresponding to two pistons according to the sequence of the grooves on the outer ring of the piston 2 from back to front;
step four: one end of a piston buffer structure 2-4 of a piston 2 is arranged on a piston rod 4 until an annular positioning step surface 2-5 on the piston 2 is abutted against an annular positioning step surface 4-3 on the piston rod 4, a clamping key, a clamping keycap and an elastic collar for a shaft are sequentially arranged on a groove 4-1 at one end of the piston rod 4 provided with the piston 2, or a nut is screwed on the groove 4-1 at one end of the piston rod 4 provided with the piston 2 and abutted against the outer end surface of the piston 2;
step five: inserting one end, which is not provided with the piston 2, of the piston rod 4 into the assembly of the oil cavity separator 3 and the cylinder barrel 1 which is installed in the step two by using a special tool until the piston 2 on the piston rod 4 abuts against a piston limiting surface 3-7 on the oil cavity separator 3, and one end, which is not provided with the piston 2, of the piston rod 4 extends out of the cylinder barrel 1;
step six: one end of a piston buffer structure 2-4 of a second piston 2 is arranged on one end of a piston rod 4 which is not provided with the piston 2 until an annular positioning step surface 2-5 on the piston 2 is abutted against an annular positioning step surface 4-3 on the piston rod 4, and a clamping key, a clamping keycap and an elastic collar for a shaft are sequentially arranged on an external thread/clamping key groove 4-1 at one end of the piston rod 4 provided with the piston 2, or a nut is screwed on the external thread/clamping key groove 4-1 at one end of the piston rod 4 provided with the piston 2 and is abutted against the outer end surface of the piston 2;
step seven: two lower supporting seats 7 are installed on a hydraulic cylinder installation surface using the hydraulic cylinder product through installation holes 7-1 on the lower supporting seats 7, the distance between the two lower supporting seats 7 is consistent with the distance between the two supporting seat installation grooves 1-1 on the cylinder barrel 1, the hydraulic cylinder assembled in the sixth step is placed into the lower supporting seats 7, two end faces of the lower supporting seats 7 are abutted against annular positioning step surfaces on the supporting seat installation grooves 1-1 on the cylinder barrel 1, the upper supporting seats 6 are buckled in the supporting seat installation grooves 1-1 of the hydraulic cylinder, the screw hole axes of the upper supporting seats 6 are coincided with the screw hole axes of the lower supporting seats 7, and screws are screwed into screw holes in the upper supporting seats 6 and the lower supporting seats 7.
Claims (7)
1. The utility model provides a no cylinder cap double-cylinder section of thick bamboo symmetry double piston pneumatic cylinder which characterized in that: comprises an oil cavity separator (3) with a hollow structure, wherein two ends of the oil cavity separator (3) are respectively provided with a cylinder barrel (1) fixedly sleeved with the oil cavity separator (3), two ends of the cylinder barrel (1) are respectively provided with a piston (2), and the piston (2) linearly reciprocates along the axial direction of the cylinder barrel (1), the piston (2), the cylinder barrel (1) and the oil chamber separator (3) on the same side form an oil chamber, a piston rod (4) with the length smaller than that of the whole hydraulic cylinder is arranged in the cylinder barrel (1) and the oil cavity separator (3), the piston rod (4) moves back and forth along the axes of the cylinder barrel (1) and the oil cavity separator (3), the piston rod (4) is of a bilateral symmetry structure, the two pistons (2) are symmetrically mounted and fixed at the end of the piston rod (4), and each cylinder barrel (1) is fixedly arranged on the supporting seat (5).
2. The double-cylinder symmetric double-piston hydraulic cylinder without a cylinder cover as claimed in claim 1, wherein: the oil cavity separator is characterized in that an internal thread (1-2) fixedly connected with the oil cavity separator (3) is arranged at one end of the cylinder barrel (1), the other end of the cylinder barrel (1) is communicated with the outside, a supporting seat mounting groove (1-1) used for being mounted and matched with a supporting seat (5) is formed in the outer ring of the cylinder barrel (1), the two cylinder barrels (1) are tightly mounted at two ends of the oil cavity separator (3) through threaded sleeves respectively, and the axis of the mounted oil cavity separator (3) is overlapped with the axis of the cylinder barrel (1).
3. The double-cylinder symmetric double-piston hydraulic cylinder without a cylinder cover as claimed in claim 2, wherein: the piston structure comprises a piston (2), a dust ring groove (2-1) used for installing a dust ring is formed in an outer ring close to the outer end face of the piston (2), a support ring groove (2-2) used for installing a support ring is formed in an outer ring of the piston (2) close to the dust ring groove (2-1), a seal ring groove (2-3) used for installing the seal ring is formed in an outer ring of the piston (2) close to the support ring groove (2-2), a piston buffering structure (2-4) is arranged at the rear end of the piston (2) and faces an oil cavity separator (3), the piston (2) is of a hollow structure, a hole used for installing and fixing a piston rod (4) is formed in the piston (2) along the axis direction of the piston, and an annular positioning step face (2-5) is arranged in the hole.
4. The double-cylinder symmetric double-piston hydraulic cylinder without a cylinder cover as claimed in claim 3, wherein: the oil cavity separator (3) is of a bilateral symmetry structure, external threads (3-1) matched with the internal threads (1-2) of the cylinder barrel (1) are arranged at two ends of the oil cavity separator (3), a hole sealing ring groove (3-2) used for installing a sealing ring is formed in the matching surface of the oil cavity separator (3) and the cylinder barrel (1) at the two ends of the oil cavity separator (3), a hole matched with the piston rod (4) and capable of limiting the degree of freedom of the piston rod (4) is formed in the oil cavity separator (3) along the axial direction of the oil cavity separator (3), a shaft sealing ring groove (3-4) used for installing the oil cavity separation sealing ring and a piston rod support ring groove (3-5) used for installing a support ring are formed in the matching surface of the oil cavity separator (3) and the piston rod (4), the oil cavity separator (3) is provided with two oil ports (3-3) which are used for communicating two oil cavities of the hydraulic cylinder with the outside in the radial direction, the two oil ports (3-3) are respectively arranged on two sides of a shaft seal ring groove (3-4), two ends of the oil cavity separator (3) are provided with piston limiting surfaces (3-7) used for limiting the movement limit position of the piston (2), two ends of the oil cavity separator (3) are provided with oil cavity separator buffering structures (3-6), and the piston buffering structures (2-4) and the oil cavity separator buffering structures (3-6) are matched to form the hydraulic cylinder buffering device.
5. The double-cylinder symmetric double-piston hydraulic cylinder without a cylinder cover as claimed in claim 4, wherein: the piston rod is characterized in that two ends of the piston rod (4) are provided with outer grooves (4-1) used for installing clamping keys to fix the piston (2), the outer end face of the piston (2) is abutted against the clamping keys arranged on the piston rod (4), the piston rod (4) is provided with a sealing ring groove (4-2) used for installing a sealing ring on the matching surface of the piston rod (4) and the piston (2), the piston rod (4) is provided with a piston rod annular positioning step face (4-3), an annular positioning step face (2-5) is abutted against the piston rod annular positioning step face (4-3), and two end faces of the piston rod (4) are provided with external load connecting holes (4-4) used for connecting external loads.
6. The double-cylinder symmetric double-piston hydraulic cylinder without a cylinder cover as claimed in claim 2, wherein: the supporting seat (5) comprises an upper supporting seat (6) and a lower supporting seat (7), the upper supporting seat (6) is fixedly connected with the lower supporting seat (7) through screws, the upper supporting seat (6) and the lower supporting seat (7) are combined to form a mounting hole matched with the supporting seat mounting groove (1-1), two end faces of the supporting seat (5) are abutted against annular positioning step faces on the supporting seat mounting groove (1-1), and a device for preventing the hydraulic cylinder from rotating circumferentially is arranged between the supporting seat (5) and the cylinder barrel (1).
7. The double-cylinder symmetric double-piston hydraulic cylinder without a cylinder cover as claimed in claim 6, wherein: mounting holes (7-1) are formed in two ends of the lower supporting seat (7), and the whole hydraulic cylinder is fixed on a hydraulic cylinder mounting surface using the hydraulic cylinder product through the mounting holes (7-1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110745605.3A CN113503287A (en) | 2021-07-01 | 2021-07-01 | Double-cylinder barrel symmetric double-piston hydraulic cylinder without cylinder cover |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110745605.3A CN113503287A (en) | 2021-07-01 | 2021-07-01 | Double-cylinder barrel symmetric double-piston hydraulic cylinder without cylinder cover |
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| CN113503287A true CN113503287A (en) | 2021-10-15 |
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| CN202110745605.3A Pending CN113503287A (en) | 2021-07-01 | 2021-07-01 | Double-cylinder barrel symmetric double-piston hydraulic cylinder without cylinder cover |
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| CN (1) | CN113503287A (en) |
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Application publication date: 20211015 |