CN108561368B - Arm lifting oil cylinder - Google Patents
Arm lifting oil cylinder Download PDFInfo
- Publication number
- CN108561368B CN108561368B CN201810554343.0A CN201810554343A CN108561368B CN 108561368 B CN108561368 B CN 108561368B CN 201810554343 A CN201810554343 A CN 201810554343A CN 108561368 B CN108561368 B CN 108561368B
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- Prior art keywords
- cylinder
- rod
- piston
- piston rod
- oil
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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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/08—Characterised by the construction of the motor unit
- F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
- F15B15/1423—Component parts; Constructional details
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/08—Characterised by the construction of the motor unit
- F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
- F15B15/1423—Component parts; Constructional details
- F15B15/1428—Cylinders
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/08—Characterised by the construction of the motor unit
- F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
- F15B15/1423—Component parts; Constructional details
- F15B15/1457—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
- F15B15/08—Characterised by the construction of the motor unit
- F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
- F15B15/149—Fluid interconnections, e.g. fluid connectors, passages
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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
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Actuator (AREA)
Abstract
The invention discloses an arm lifting oil cylinder which comprises a cylinder bottom and a cylinder body connected with the cylinder bottom, wherein a piston is arranged on the inner side of the cylinder body, a piston rod is arranged on the piston, a rod head is arranged on the piston rod, a rod cavity and a rodless cavity are formed in the cylinder body, a cylinder bottom oil port is arranged on the cylinder bottom, a rod head oil port is arranged on the rod head, the piston rod is of a hollow structure, a guide pipe is arranged in the piston rod, and the cylinder bottom oil port and the rod head oil port are communicated through the guide pipe to form an oil circuit in the piston rod. Through the mode, the arm lifting oil cylinder disclosed by the invention can meet the use requirement, is convenient to assemble and high in assembly precision, shortens the production period and reduces the cost.
Description
Technical Field
The invention relates to the field of hydraulic oil cylinders, in particular to an arm lifting oil cylinder.
Background
The arm lifting oil cylinder is an important part in machinery such as a loader, and the oil cylinder has an extra connection function besides meeting the self motion function due to the fact that a rack structure where the oil cylinder is located is extremely compact. The existing arm lifting oil cylinder cannot meet specific use requirements.
Disclosure of Invention
The invention mainly solves the technical problem of providing the arm lifting oil cylinder which can meet the use requirement, is convenient to assemble and high in assembly precision, shortens the production period and reduces the cost.
In order to solve the technical problems, the invention adopts a technical scheme that: the utility model provides a lift arm hydro-cylinder, include the cylinder bottom and the cylinder body of being connected with the cylinder bottom, the cylinder body inboard is equipped with the piston, install the piston rod on the piston, install the pole head on the piston rod, there are pole chamber and no pole chamber in the cylinder body, be equipped with the cylinder bottom hydraulic fluid port on the cylinder bottom, be equipped with the pole head hydraulic fluid port on the pole head, the piston rod is hollow structure to the inside pipe that is equipped with of piston rod, form the oil circuit through the pipe intercommunication in the inside of piston rod between cylinder bottom hydraulic fluid port and the pole head hydraulic fluid port.
In a preferred embodiment of the invention, one end of the guide pipe is fixedly connected to the cylinder bottom, and the other end of the guide pipe is arranged on the pressure plate.
In a preferred embodiment of the present invention, the pressure plate is provided with a plurality of through holes to ensure the smoothness of the oil path.
In a preferred embodiment of the invention, a pull rod is further installed inside the guide tube, one end of the pull rod is connected to the cylinder bottom in a threaded mode, the other end of the pull rod is fastened to the pressure plate through a locking nut, and a locking gasket is arranged between the pressure plate and the locking nut.
In a preferred embodiment of the invention, the oil passage is sealed from the rodless chamber and the rod chamber.
In a preferred embodiment of the invention, the oil path and the rod chamber are sealed by a dynamic sealing structure, and the oil path and the rodless chamber are sealed by a static sealing structure.
In a preferred embodiment of the invention, the dynamic sealing structure is composed of a plurality of sealing rings and retaining rings for U-shaped rods arranged on the piston, and the static sealing structure is an O-shaped sealing ring on the bottom end face of the cylinder.
In a preferred embodiment of the present invention, the piston and the piston rod are radially fixed by a locking screw, and the piston rod is further sleeved with a stop tube, and the stop tube is located at the right end of the piston.
In a preferred embodiment of the invention, the end part of the piston, the opening part of the cylinder bottom and the two sides of the guide pipe are provided with assembling bevels, and a guide sleeve is arranged between the front end of the cylinder body and the front end of the piston rod.
The invention has the beneficial effects that: the arm lifting oil cylinder can meet the use requirement, is convenient to assemble, has high assembly precision, shortens the production period and reduces the cost.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without inventive efforts, wherein:
FIG. 1 is a schematic diagram of a preferred embodiment of a lift arm cylinder according to the present invention;
FIG. 2 is a schematic view of a portion of the structure of FIG. 1;
FIG. 3 is a schematic view of a portion of the structure of FIG. 1;
the parts in the drawings are numbered as follows: 1. The hydraulic cylinder comprises a cylinder bottom, 2, a cylinder body, 3, a piston, 4, a piston rod, 5, a rod head, 6, a cylinder bottom oil port, 7, a rod head oil port, 8, a guide pipe, 9, a pressure plate, 10, a through hole, 11, a pull rod, 12, a locking gasket, 13, a dynamic sealing structure, 14, a static sealing structure, 15, a locking screw, 16, a stop pipe, 17, a guide sleeve, 18 and a locking nut.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1 to 3, an arm lifting cylinder includes a cylinder bottom 1 and a cylinder body 2 connected to the cylinder bottom 1, a piston 3 is disposed inside the cylinder body 2, a piston rod 4 is mounted on the piston 3, a rod head 5 is mounted on the piston rod 4, a rod cavity and a rodless cavity are disposed in the cylinder body 2, a cylinder bottom oil port 6 is disposed on the cylinder bottom 1, a rod head oil port 7 is disposed on the rod head 5, the piston rod 4 is of a hollow structure, a conduit 8 is disposed inside the piston rod 4, and the cylinder bottom oil port 6 and the rod head oil port 7 are communicated with each other through the conduit 8 to form an oil path inside the piston rod 4.
One end of the conduit 8 is fixedly connected to the cylinder bottom 1, and the other end is mounted on the pressure plate 9. The pressure plate 9 is provided with a plurality of through holes 10 to ensure smooth oil paths.
In addition, a pull rod 11 is further installed inside the guide pipe 8, one end of the pull rod 11 is connected to the cylinder bottom 1 in a threaded mode, the other end of the pull rod 11 is fastened to the pressure plate 9 through a locking nut 18, and a locking gasket 12 is arranged between the pressure plate 9 and the locking nut 18. The root of the pull rod 11 is provided with a section of thread, the corresponding part on the cylinder bottom 1 is also provided with a section of thread, the length of the thread is strictly the same, and the two parts are matched, positioned and connected by the thread. And the locking of the thread is carried out by adopting a welding mode, so that the fixation of the pull rod 11 and the guide pipe 8 is perfectly realized.
In addition, the oil path is sealed and isolated from the rodless cavity and the rod cavity. The oil path and the rod chamber are sealed by a dynamic sealing structure 13, and the oil path and the rodless chamber are sealed by a static sealing structure 14. The dynamic sealing structure 13 is composed of a plurality of U-shaped rod sealing rings and check rings arranged on the piston, and the static sealing structure 14 is an O-shaped sealing ring on the bottom end face of the cylinder. The sealing rings and the check rings are used for dynamic sealing through the plurality of U-shaped rods, so that the space is saved, the sealing in the back-and-forth movement is ensured, and in order to ensure the sealing quality, a support ring is respectively arranged on each U-shaped sealing ring, so that the stability of the movement of the piston is ensured. A bell mouth is processed at the end part of the piston 3, and the mouth part is rounded. The ring is convenient to mount, and meanwhile, the effect of reducing weight is achieved. A large counter bore is processed on the end face of the cylinder bottom 1, a static sealing O-shaped ring is arranged on the counter bore and the guide pipe 8 in a matched mode, and in order to guarantee sealing quality, the guide pipe 8 must be firmly attached to the bottom of the counter bore.
In addition, the piston 3 and the piston rod 4 are radially fixed through a locking screw 15, a stop pipe 16 is further sleeved on the piston rod 4, and the stop pipe 16 is located at the right end of the piston 3. The locking screw 15 is placed in the tool withdrawal groove of the thread, the thread cannot be damaged by tightening the tool withdrawal groove, repeated disassembly is facilitated, the inner diameter of the tool withdrawal groove is smaller, and the locking quality can be better guaranteed. This patent has arranged one cooperation shelves at piston and piston rod innovatively, and the axiality between the two is realized through cooperation shelves, and the requirement of the axiality between piston and piston rod is hardly guaranteed owing to the reason of machining precision to the screw thread, if do not have this cooperation shelves, the sealing washer probably can premature wear. The matching gear provides a space for arranging static seal between the rod cavity and the rodless cavity on the premise of ensuring the matching precision of the piston and the piston rod.
In addition, the end part of the piston 3, the opening part of the cylinder bottom 1 and two sides of the guide pipe 8 are provided with assembling oblique angles, so that the assembling convenience is fully ensured, and a guide sleeve 17 is arranged between the front end of the cylinder body 2 and the front end of the piston rod 4.
Compared with the prior art, the arm lifting oil cylinder disclosed by the invention can meet the use requirement, is convenient to assemble and high in assembly precision, shortens the production period and reduces the cost.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by the present specification, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (4)
1. A lifting arm oil cylinder comprises a cylinder bottom and a cylinder body connected with the cylinder bottom, wherein a piston is arranged on the inner side of the cylinder body, a piston rod is mounted on the piston, a rod head is mounted on the piston rod, a rod cavity and a rodless cavity are formed in the cylinder body, the lifting arm oil cylinder is characterized in that a cylinder bottom oil port is formed in the cylinder bottom, a rod head oil port is formed in the rod head, the piston rod is of a hollow structure, a guide pipe is arranged inside the piston rod, the cylinder bottom oil port and the rod head oil port are communicated with each other through a guide pipe to form an oil circuit inside the piston rod, one end of the guide pipe is fixedly connected to the cylinder bottom, a pressing plate is mounted in the other end of the guide pipe, a plurality of through holes are formed in the pressing plate to ensure that the oil circuit is smooth, a pull rod is further mounted inside the, the oil circuit is sealed and isolated from the rodless cavity and the rod cavity, the oil circuit and the rod cavity are sealed through a dynamic sealing structure, and the oil circuit and the rodless cavity are sealed through a static sealing structure.
2. The arm lift cylinder according to claim 1, wherein the dynamic seal structure is formed by a plurality of U-shaped rod seal rings and retainer rings provided on the piston, and the static seal structure is an O-ring seal ring provided on the bottom end surface of the cylinder.
3. The boom cylinder according to any one of claims 1 to 2, wherein the piston and the piston rod are radially fixed by a locking screw, and the piston rod is further sleeved with a stopper tube positioned at a right end of the piston.
4. The lift arm cylinder according to claim 3, wherein the end portion of the piston, the opening portion of the cylinder bottom, and both sides of the guide pipe have fitting bevels, and a guide sleeve is provided between the cylinder body and the front end of the piston rod.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810554343.0A CN108561368B (en) | 2018-06-01 | 2018-06-01 | Arm lifting oil cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810554343.0A CN108561368B (en) | 2018-06-01 | 2018-06-01 | Arm lifting oil cylinder |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108561368A CN108561368A (en) | 2018-09-21 |
| CN108561368B true CN108561368B (en) | 2020-11-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810554343.0A Active CN108561368B (en) | 2018-06-01 | 2018-06-01 | Arm lifting oil cylinder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108561368B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108953286A (en) * | 2018-11-01 | 2018-12-07 | 江苏恒立液压股份有限公司 | Clamping cylinder |
| CN113803446A (en) * | 2021-09-23 | 2021-12-17 | 江苏恒立液压股份有限公司 | Hydraulic or pneumatic detection oil cylinder structure |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4327438C2 (en) * | 1993-08-14 | 1995-12-14 | Audi Ag | Pneumatic cylinder |
| CN203978998U (en) * | 2014-08-13 | 2014-12-03 | 合肥长源液压股份有限公司 | Built-in folded formula vitta structure hydraulic jack |
| CN105650056A (en) * | 2016-03-31 | 2016-06-08 | 江阴市洪腾机械有限公司 | Lorry-mounted crane telescopic arm oil cylinder |
| CN107061412A (en) * | 2017-04-01 | 2017-08-18 | 江苏高德液压机械有限公司 | Telescopic oil cylinder |
| CN208311178U (en) * | 2018-06-01 | 2019-01-01 | 江苏恒立液压股份有限公司 | Lift arm oil cylinder |
-
2018
- 2018-06-01 CN CN201810554343.0A patent/CN108561368B/en active Active
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| Publication number | Publication date |
|---|---|
| CN108561368A (en) | 2018-09-21 |
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