CN221120523U - Digital hydraulic cylinder with built-in central oil pipe - Google Patents
Digital hydraulic cylinder with built-in central oil pipe Download PDFInfo
- Publication number
- CN221120523U CN221120523U CN202323038515.4U CN202323038515U CN221120523U CN 221120523 U CN221120523 U CN 221120523U CN 202323038515 U CN202323038515 U CN 202323038515U CN 221120523 U CN221120523 U CN 221120523U
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- Prior art keywords
- oil pipe
- piston rod
- gear box
- central oil
- screw rod
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- 238000007789 sealing Methods 0.000 claims abstract description 27
- 230000005540 biological transmission Effects 0.000 claims abstract description 24
- 230000008878 coupling Effects 0.000 claims description 8
- 238000010168 coupling process Methods 0.000 claims description 8
- 238000005859 coupling reaction Methods 0.000 claims description 8
- 239000003921 oil Substances 0.000 description 28
- 239000010720 hydraulic oil Substances 0.000 description 7
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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- Actuator (AREA)
- Supply Devices, Intensifiers, Converters, And Telemotors (AREA)
- Transmission Devices (AREA)
Abstract
The utility model provides a digital hydraulic cylinder with a built-in central oil pipe, which comprises a cylinder body, a transmission piece and a gear box; a piston rod and a sealing ring are arranged in the cylinder body, one end of the piston rod is provided with an opening, the sealing ring is contained in the cylinder body and is installed at the opening of the piston rod, a moving part is arranged in the sealing ring, the piston rod is movably inserted in the cylinder body, a central oil pipe is arranged in the piston rod, the central oil pipe stretches into the sealing ring to seal, and a screw rod in threaded fit with the moving part is arranged in the central oil pipe; the transmission piece is connected with the gear box, the screw rod is connected with the gear box, the transmission piece drives the gear box to move, the gear box drives the screw rod to move, and the moving piece moves on the screw rod in a straight line to enable the piston rod to extend or retract.
Description
Technical Field
The utility model relates to the technical field of hydraulic cylinders, in particular to a digital hydraulic cylinder with a built-in central oil pipe.
Background
The digital hydraulic cylinder is a linear hydraulic amplifier integrated with mechanical feedback, and the digital valve is driven by an electric control stepping motor and controls the oil inlet and outlet of hydraulic oil in the system. Depending on the direction of rotation of the motor, pressurized oil will enter the rod or rodless chamber of the hydraulic cylinder, controlling the extension or retraction of the piston rod.
Because the digital hydraulic cylinder can accurately control the displacement of the hydraulic cylinder, various electromagnetic valves are not needed, the cost is reduced, the control precision is ensured, the digital hydraulic cylinder is applied to various engineering machinery hydraulic cylinders, but the digital hydraulic cylinder needs to integrate the hydraulic cylinder, a servo motor, a digital valve and a transmission device into a whole, the structure is complex, and the installation space requirement is large. This is particularly unsuitable for large bore cylinders where there is a structural limitation in the mounting and weight saving requirements.
In view of the foregoing, it is desirable to provide a new type of digital hydraulic cylinder with a built-in center tube to overcome the above-mentioned drawbacks.
Disclosure of utility model
The utility model aims to provide a digital hydraulic cylinder with a built-in central oil pipe, which is characterized in that a central oil pipe is added into an inner hole of a piston rod, so that a screw rod can freely move in the central oil pipe, hydraulic oil is prevented from entering the inner hole of the piston rod, the working volume of the hydraulic cylinder is reduced, and the total weight of the hydraulic cylinder is reduced.
In order to achieve the above purpose, the utility model provides a digital hydraulic cylinder with a built-in central oil pipe, which comprises a cylinder body, a transmission piece and a gear box; a piston rod and a sealing ring are arranged in the cylinder body, one end of the piston rod is provided with an opening, the sealing ring is accommodated in the cylinder body and is arranged at the opening of the piston rod, a moving part is arranged in the sealing ring,
The piston rod is movably inserted into the cylinder body, a central oil pipe is arranged in the piston rod, the central oil pipe extends into the sealing ring for sealing, and a screw rod in threaded fit with the moving part is arranged in the central oil pipe;
The transmission piece is connected with the gear box, the screw rod is connected with the gear box, the transmission piece drives the gear box to move, the gear box drives the screw rod to move, and the moving piece moves on the screw rod in a straight line to enable the piston rod to extend or retract.
Preferably, the digital hydraulic cylinder with the built-in central oil pipe further comprises a first coupler and a second coupler, the transmission piece is connected with a gear box through the first coupler, and the gear box is connected with a screw rod through the second coupler.
Preferably, a bearing is arranged in the bearing seat, and the screw rod passes through the sealing ring and the bearing to be connected with the second coupler.
Preferably, the moving part is fixedly arranged at one end of the screw rod, which is close to the sealing ring, through a fastening piece.
Preferably, the digital hydraulic cylinder with the built-in central oil pipe further comprises a bearing seat, wherein the bearing seat is connected with the sealing ring and is positioned outside the piston rod.
Compared with the prior art, the hydraulic cylinder has the beneficial effects that 1) the center oil pipe is added through the inner hole of the piston rod, so that the screw rod can freely move in the center oil pipe, hydraulic oil is prevented from entering the inner hole of the piston rod, the working volume of the hydraulic cylinder is reduced, and the total weight of the hydraulic cylinder is reduced.
2) The transmission mode that the right-angle gear box is connected with the screw rod is adopted, so that the whole length of the hydraulic cylinder is shortened, and the hydraulic cylinder is convenient to install.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present utility model and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a cross-sectional view of a digital hydraulic cylinder with a built-in center oil pipe provided by the utility model.
Reference numerals: 1. a cylinder; 11. a piston rod; 111. a central oil pipe; 12. a seal ring; 13. a screw rod; 121. a moving member; 2. a transmission member; 3. a gear box; 4. a first coupling; 5. a second coupling; 6. a bearing 61 seat; 61. a bearing; 7. a fastener.
Detailed Description
In order to make the objects, technical solutions and advantageous technical effects of the present utility model more apparent, the present utility model will be further described in detail with reference to the accompanying drawings and detailed description. It should be understood that the detailed description is intended to illustrate the utility model, and not to limit the utility model.
It is to be understood that the terms "upper," "lower," "front," "rear," "left," "right," "top," "bottom," "inner," "outer," and the like indicate or are based on the orientation or positional relationship shown in the drawings, merely to facilitate describing the present utility model and simplify the description, and do not indicate or imply that the devices or elements being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present utility model.
It should also be noted that unless explicitly stated or limited otherwise, terms such as "mounted," "connected," "secured," "disposed," and the like are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. It will be apparent to those skilled in the art that the terms described above have the particular meaning in the present utility model, as the case may be.
Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first", "a second", or a third "may explicitly or implicitly include one or more such feature. Furthermore, the meaning of "a plurality of", "a number" means two or more, unless specifically defined otherwise.
Referring to fig. 1, the utility model provides a digital hydraulic cylinder with a built-in central oil pipe, which comprises a cylinder body 1, a transmission piece 2 and a gear box 3;
A piston rod 11 and a sealing ring 12 are arranged in the cylinder body 1, one end of the piston rod 11 is provided with an opening, the sealing ring 12 is accommodated in the cylinder body 1 and is arranged at the opening of the piston rod 11, a moving part 121 is arranged in the sealing ring 12,
The piston rod 11 is a hollow tube, the piston rod 11 is movably inserted into the cylinder body 1, a central oil pipe 111 is arranged in the piston rod 11, the central oil pipe 111 extends into the sealing ring 12 to seal, hydraulic oil in the central oil pipe 111 is prevented from entering the piston rod 11, and a screw rod 13 in threaded fit with the moving part 121 is arranged in the central oil pipe 111;
The transmission piece 2 is connected with the gear box 3, the screw rod 13 is connected with the gear box 3, the transmission piece 2 drives the gear box 3 to move, the gear box 3 drives the screw rod 13 to move, and the moving piece 121 moves on the screw rod 13 in a straight line to enable the piston rod 11 to extend out of the cylinder body 1.
In this embodiment, the two ends of the cylinder 1 are both provided with openings, the cylinder 1 is hollow, the transmission member 2 is a motor, the gear box 3 is a right angle gear box 3, and the moving member 121 is a nut.
So, the transmission part 2 drives the gear box 3 to move, the gear box 3 drives the screw rod 13 to move, and the moving part 121 moves on the screw rod 13 in a straight line so that the piston rod 11 extends out of the cylinder body 1;
Or the transmission part 2 is reversely rotated to drive the gear box 3 to move, the gear box 3 drives the screw rod 13 to move, and the moving part 121 moves on the screw rod 13 in a straight line to retract the piston rod 11.
In a preferred embodiment, the digital hydraulic cylinder with the built-in central oil pipe further comprises a first coupler 4 and a second coupler 5, the transmission part 2 is connected with the gear box 3 through the first coupler 4, and the gear box 3 is connected with a screw rod through the second coupler 5 to form a set of transmission mechanism.
In a preferred embodiment, the digital hydraulic cylinder with the built-in central oil pipe further comprises a bearing seat 6, wherein the bearing seat 6 is connected with a sealing ring 12 and is positioned outside the piston rod 11.
In a preferred embodiment, a bearing 61 is mounted in the bearing housing 6, and the screw 13 is connected to the second coupling through the sealing ring 12 and the bearing 61.
In a preferred embodiment, the moving member 121 is fixedly mounted by means of a fastener 7 (e.g. a screw) at the end of the screw rod 13 adjacent to the sealing ring 12, the screw rod and the moving member 121 cooperating to form a moving part of the screw rod, while the screw rod can enter the central oil tube 111.
When the cylinder is used, the transmission piece 2 drives the gear box 3 to move, the gear box 3 drives the screw rod 13 to move, and the moving piece 121 moves on the screw rod 13 in a straight line so that the piston rod 11 extends out of the cylinder body 1;
Or the transmission part 2 is reversely rotated to drive the gear box 3 to move, the gear box 3 drives the screw rod 13 to move, and the moving part 121 moves on the screw rod 13 in a straight line to retract the piston rod 11.
Because the inside center oil pipe 111 that is provided with of piston rod 11, center oil pipe 111 stretches into the inside sealing washer 12 and seals, avoids the hydraulic oil in the center oil pipe 111 to get into in the piston rod 11, has separated the hydraulic oil of cylinder body 1 inner space and piston rod 11 inner chamber, has reduced the use of hydraulic oil, has reduced the holistic weight of pneumatic cylinder during operation.
The present utility model is not limited to the details and embodiments described herein, and thus additional advantages and modifications may readily be made by those skilled in the art, without departing from the spirit and scope of the general concepts defined in the claims and the equivalents thereof, and the utility model is not limited to the specific details, representative apparatus and illustrative examples shown and described herein.
Claims (5)
1. The digital hydraulic cylinder with the built-in central oil pipe is characterized by comprising a cylinder body (1), a transmission piece (2) and a gear box (3); a piston rod (11) and a sealing ring (12) are arranged in the cylinder body (1), one end of the piston rod (11) is provided with an opening, the sealing ring (12) is contained in the cylinder body (1) and is arranged at the opening of the piston rod (11), a moving part (121) is arranged in the sealing ring (12),
The piston rod (11) is movably inserted into the cylinder body (1), a central oil pipe (111) is arranged in the piston rod (11), the central oil pipe (111) stretches into the sealing ring (12) to seal, and a screw rod (13) in threaded fit with the moving part (121) is arranged in the central oil pipe (111);
the transmission piece (2) is connected with the gear box (3), the screw rod (13) is connected with the gear box (3), the transmission piece (2) drives the gear box (3) to move, the gear box (3) drives the screw rod (13) to move, and the moving piece (121) moves linearly on the screw rod (13) to enable the piston rod (11) to extend or retract.
2. The digital hydraulic cylinder with built-in central oil pipe according to claim 1, characterized in that the digital hydraulic cylinder with built-in central oil pipe further comprises a first coupling (4) and a second coupling (5), the transmission member (2) is connected with a gear box (3) through the first coupling (4), and the gear box (3) is connected with a screw (13) through the second coupling (5).
3. A digital hydraulic cylinder with built-in central oil pipe according to claim 2, characterized in that the bearing block (6) is internally provided with a bearing (61), and the screw rod (13) is connected with the second coupling (5) through the sealing ring (12) and the bearing (61).
4. A digital hydraulic cylinder with built-in central oil pipe according to claim 1, characterized in that the moving part (121) is fixedly mounted at one end of the screw rod (13) close to the sealing ring (12) by means of a fastening part (7).
5. The digital hydraulic cylinder with built-in center oil pipe according to claim 1, further comprising a bearing block (6), wherein the bearing block (6) is connected with a sealing ring (12) and is located outside the piston rod (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202323038515.4U CN221120523U (en) | 2023-11-09 | 2023-11-09 | Digital hydraulic cylinder with built-in central oil pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202323038515.4U CN221120523U (en) | 2023-11-09 | 2023-11-09 | Digital hydraulic cylinder with built-in central oil pipe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN221120523U true CN221120523U (en) | 2024-06-11 |
Family
ID=91361097
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202323038515.4U Active CN221120523U (en) | 2023-11-09 | 2023-11-09 | Digital hydraulic cylinder with built-in central oil pipe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN221120523U (en) |
-
2023
- 2023-11-09 CN CN202323038515.4U patent/CN221120523U/en active Active
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