CN222910411U

CN222910411U - A double-section oil cylinder

Info

Publication number: CN222910411U
Application number: CN202421802891.8U
Authority: CN
Inventors: 潘宗祥
Original assignee: Ningbo Buer Oil Pressure Technology Co ltd
Current assignee: Ningbo Buer Oil Pressure Technology Co ltd
Priority date: 2024-07-26
Filing date: 2024-07-26
Publication date: 2025-05-27
Anticipated expiration: 2034-07-26

Abstract

The present application discloses a double-section oil cylinder, which belongs to the field of hydraulic technology. The double-section oil cylinder comprises a cylinder body, a first piston rod and a second piston rod. The cylinder body is provided with a first cavity and a second cavity. The first cavity is provided at one end of the second cavity along the length direction of the cylinder body. The first piston rod is slidably provided in the first cavity, and the second piston rod is slidably provided in the second cavity, and is suitable for sliding into the first cavity to push the first piston rod. The double-section oil cylinder has the characteristics of being able to quickly push out the piston rod, having a simple structure, and having low processing and use costs.

Description

Double-oil-saving cylinder

Technical Field

The application relates to the technical field of hydraulic pressure, in particular to a double-section oil cylinder.

Background

The oil cylinder is a hydraulic executive component which converts hydraulic energy into mechanical energy and can do linear reciprocating motion (or swinging motion), has simple structure and reliable work, and is widely applied to hydraulic systems of various machines. But the push-out speed of the piston rod of the existing oil cylinder needs to be improved.

Disclosure of Invention

The application aims to provide a double-section oil cylinder, which can realize rapid pushing out of a piston rod and has low processing and manufacturing cost.

In order to achieve the purpose, the technical scheme includes that the double-section oil cylinder comprises a cylinder body, a first piston rod and a second piston rod, wherein a first cavity and a second cavity are arranged in the cylinder body, the first cavity is arranged at one end of the second cavity along the length direction of the cylinder body, the first piston rod is arranged in the first cavity in a sliding mode, and the second piston rod is arranged in the second cavity in a sliding mode and is suitable for sliding towards the first cavity to push the first piston rod.

Preferably, the first piston rod comprises a first rod body and a first stopper body which are connected with each other, the second piston rod comprises a second rod body and a second stopper body which are connected with each other, the first rod body is arranged at one side far away from the second piston rod and is separated from the inner wall of the first cavity, the first stopper body is arranged at one side close to the second piston rod and is slidably abutted to the inner wall of the first cavity, the second rod body is arranged at one side close to the first stopper body and is separated from the inner wall of the first cavity and the inner wall of the second cavity, and the second stopper body is arranged at one side far away from the second stopper body and is slidably abutted to the inner wall of the second cavity.

Preferably, a first sealing element is arranged at one end of the first cavity away from the second cavity, and the first sealing element is arranged between the first rod body and the cylinder body in a surrounding mode.

Preferably, a second sealing member is disposed in the cylinder body, the second sealing member divides the cavity in the cylinder body into the first cavity and the second cavity, a through hole is disposed on the second sealing member, and the second piston rod penetrates through the through hole.

Preferably, the cylinder body comprises a first shell and a second shell which are spliced with each other, the first shell forms the first cavity, and the second shell forms the second cavity.

Preferably, the cylinder body is provided with a first oil unloading hole and a first oil inlet hole which are communicated with the first cavity, and a second oil unloading hole and a second oil inlet hole which are communicated with the second cavity.

Preferably, the first oil discharging hole, the first oil inlet hole, the second oil discharging hole and the second oil inlet hole are sequentially formed in the same side face of the cylinder body along the length direction of the cylinder body.

Preferably, the aperture of the outward side of the first oil discharging hole, the aperture of the first oil inlet hole, the aperture of the second oil discharging hole and the aperture of the outward side of the second oil inlet hole are larger than the aperture of the inward side.

Preferably, an end face of the second piston rod, which is close to the first piston rod, is adapted to abut against the first piston rod, and a first groove extending from an edge opposite to the first oil inlet hole toward the center is provided on the end face.

Preferably, a second groove extending from the second oil inlet hole to the center is formed in one surface of the second cavity, which is far away from the first cavity.

Compared with the prior art, the application has the beneficial effects that (1) the two cavities can respectively form two hydraulic circuits, wherein the hydraulic circuit connected with the first cavity directly drives the first piston rod, and the hydraulic circuit connected with the second cavity directly drives the second piston rod, so that the second piston rod is extruded into the first cavity, thereby indirectly driving the first piston rod, and the first piston rod can be rapidly pushed out under the boosting of the second piston rod. And (2) the double-section oil cylinder has a simple structure and low processing and manufacturing cost.

Drawings

Fig. 1 is a schematic perspective view of a dual-section cylinder according to some embodiments of the present application.

Fig. 2 is a schematic diagram of an exploded structure of a dual-section cylinder according to some embodiments of the present application.

Fig. 3 is a schematic cross-sectional view of a dual-section cylinder according to some embodiments of the present application.

Fig. 4 is a schematic structural view of a second housing according to some embodiments of the present application.

Fig. 5 is a schematic cross-sectional view of the second housing shown in fig. 4 along A-A.

Fig. 6 is a schematic view of the structure of the second piston rod in some embodiments of the present application.

10, A cylinder body; 11, a first shell, 111, a first cavity, 112, a first oil discharging hole, 113, a first oil inlet hole, 12, a second shell, 121, a second cavity, 122, a second oil discharging hole, 123, a second oil inlet hole, 124, a second groove, 20, a first sealing element, 30, a first piston rod, 31, a first rod body, 32, a first plug body, 40, a second sealing element, 50, a second piston rod, 51, a second rod body, 511, a first groove, 52 and a second plug body.

Detailed Description

The present application will be further described with reference to the following specific embodiments, and it should be noted that, on the premise of no conflict, new embodiments may be formed by any combination of the embodiments or technical features described below.

In the description of the present application, it should be noted that, for the azimuth words such as terms "center", "lateral", "longitudinal", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., the azimuth and positional relationships are based on the azimuth or positional relationships shown in the drawings, it is merely for convenience of describing the present application and simplifying the description, and it is not to be construed as limiting the specific scope of protection of the present application that the device or element referred to must have a specific azimuth configuration and operation.

It should be noted that the terms "first," "second," and the like in the description and in the claims are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order.

The terms "comprises" and "comprising," along with any variations thereof, in the description and claims, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

The application provides a double-section oil cylinder, which comprises a cylinder body 10, a first piston rod 30 and a second piston rod 50, wherein a first cavity 111 and a second cavity 121 are arranged in the cylinder body 10, the first cavity 111 is arranged at one end of the second cavity 121 along the length direction of the cylinder body 10, the first piston rod 30 is arranged in the first cavity 111 in a sliding manner, and the second piston rod 50 is arranged in the second cavity 121 in a sliding manner and is suitable for sliding towards the inside of the first cavity 111 so as to push the first piston rod 30. In the application, two cavities can respectively form two hydraulic circuits, wherein the hydraulic circuit connected with the first cavity 111 directly drives the first piston rod 30, the hydraulic circuit connected with the second cavity 121 directly drives the second piston rod 50, so that the second piston rod 50 is extruded into the first cavity 111, thereby indirectly driving the first piston rod 30, and the first piston rod 30 can be rapidly pushed out under the assistance of the second piston rod 50. And the double-section oil cylinder has simple structure and low processing and manufacturing cost.

In some embodiments, the first piston rod 30 includes a first rod body 31 and a first stopper body 32 connected to each other, the first rod body 31 is disposed at a side far from the second piston rod 50 and separated from an inner wall of the first cavity 111, and the first stopper body 32 is disposed at a side near the second piston rod 50 and slidably abuts against the inner wall of the first cavity 111. In other words, the first plug body 32 abuts against the inner wall of the first cavity 111, so that the first cavity 111 can be divided into an upper part and a lower part, wherein a space suitable for filling hydraulic oil is formed between the first rod body 31 and the inner wall of the first cavity 111, and another space suitable for filling hydraulic oil is formed between one surface of the first plug body 32 facing the second piston rod 50 and the second piston rod 50, so that the first piston rod 30 can be driven to extend/retract outside the cylinder 10 by controlling the filling and discharging of the hydraulic oil in the two spaces. Correspondingly, the second piston rod 50 comprises a second rod body 51 and a second stopper body 52 which are connected with each other, the second rod body 51 is arranged at one side close to the first stopper body 32 and separated from the inner walls of the first cavity 111 and the second cavity 121, and the second stopper body 52 is arranged at one side far away from the second stopper body 52 and slidably abuts against the inner wall of the second cavity 121. By filling and discharging hydraulic oil on the upper side and the lower side of the second plug body 52, the second piston rod 50 can be driven to extend to the first cavity 111 or retract to the second cavity 121.

In some embodiments, a first sealing member 20 is disposed at an end of the first cavity 111 away from the second cavity 121, and the first sealing member 20 is disposed between the first rod 31 and the cylinder 10 in a surrounding manner, so as to seal the first cavity 111, prevent hydraulic oil in the first cavity 111 from exuding, and prevent dust and impurities from outside from being brought into the first cavity 111 during repeated expansion and contraction of the first piston rod 30.

In some embodiments, a second seal 40 is disposed in the cylinder 10, the second seal 40 divides the cavity inside the cylinder 10 into a first cavity 111 and a second cavity 121, so that the hydraulic circuit of the first piston rod 30 is separated from the hydraulic circuit of the second piston rod 50, a through hole is disposed on the second seal 40, and the second piston rod 50 is disposed through the through hole. It will be appreciated that when the second piston rod 50 is retracted into the second cavity 121, at least a portion of the second rod body 51 remains within and seals the through hole. In other words, the second rod 51 is always inserted into the through hole within the sliding stroke range of the second piston rod 50 to close the through hole, and cooperates with the second seal 40 to isolate the two hydraulic circuits.

In some embodiments, the cylinder 10 includes a first housing 11 and a second housing 12 spliced to each other, the first housing 11 forming a first cavity 111 and the second housing 12 forming a second cavity 121. The housing is provided separately so as to mount the first piston rod 30, the second piston rod 50, the second seal 40, etc. to corresponding positions within the cylinder 10.

In some embodiments, the outer wall of the first housing 11 is disposed coplanar with the outer wall of the second housing 12 to provide a relatively flat and smooth outer surface of the cylinder 10.

In some embodiments, the inner walls of the ends of the first and second housings 11, 12 connected to each other are also disposed coplanar. Further, inner walls of the ends of the first housing 11 and the second housing 12 connected to each other are fitted to each other to form a catching groove so as to provide the second sealing member 40.

In some embodiments, the first cavity 111 and the second cavity 121 are substantially cylindrical, so as to be shaped by machining, and the diameters of the first cavity 111 and the second cavity 121 are the same, so as to reduce design complexity of the two cavity parts, and facilitate design and calculation of relevant parameters of the hydraulic circuit.

In some embodiments, the cylinder block 10 is provided with a first oil discharge hole 112 and a first oil inlet hole 113 communicating with the first chamber 111, and a second oil discharge hole 122 and a second oil inlet hole 123 communicating with the second chamber 121. The first cavity 111, the first oil discharging hole 112, the first oil inlet hole 113, and a pipeline, a valve, etc. connected with the first oil discharging hole 112 and the first oil inlet hole 113 together form a hydraulic circuit suitable for driving the first piston rod 30. The second cavity 121, the second oil discharge hole 122, the second oil inlet hole 123, and the pipes, valves, etc. connected to the second oil discharge hole 122 and the second oil inlet hole 123 together constitute another hydraulic circuit adapted to drive the second piston rod 50.

In some embodiments, the first oil discharge hole 112, the first oil inlet hole 113, the second oil discharge hole 122, and the second oil inlet hole 123 are sequentially disposed at the same side of the cylinder 10 in the length direction of the cylinder 10. So that the hydraulic lines are intensively laid on the same side of the cylinder 10.

In some embodiments, the outward side of the first oil drain hole 112, the first oil inlet hole 113, the second oil drain hole 122, and the second oil inlet hole 123 has a larger diameter than the inward side to adjust the flow rate of oil.

In some embodiments, an end surface of the second piston rod 50 adjacent to the first piston rod 30 is adapted to abut the first piston rod 30, and a first groove 511 extending from an opposite edge to the first oil inlet hole 113 toward the center is provided on the end surface. Similarly, in some embodiments, a side of the second cavity 121 remote from the first cavity 111 is provided with a second groove 124 extending from the second oil inlet hole 123 toward the center. The first and second grooves 511, 124 serve to guide the oil flow to the center position and push the first and second plugs 32, 52 from the center position. In one embodiment, the first groove 511 may be machined directly into the second shank 51, or may be machined into a separate component that is then mounted to the second shank 51.

The foregoing has outlined the basic principles, features, and advantages of the present application. It will be understood by those skilled in the art that the present application is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present application, and various changes and modifications may be made therein without departing from the spirit and scope of the application, which is defined by the appended claims. The scope of the application is defined by the appended claims and equivalents thereof.

Claims

1. The double-section oil cylinder is characterized by comprising a cylinder body, a first piston rod and a second piston rod, wherein a first cavity and a second cavity are arranged in the cylinder body, the first cavity is arranged at one end of the second cavity along the length direction of the cylinder body, the first piston rod is arranged in the first cavity in a sliding mode, the second piston rod is arranged in the second cavity in a sliding mode, and the second piston rod is suitable for sliding in the first cavity to push the first piston rod.

2. The dual-section oil cylinder according to claim 1, wherein the first piston rod comprises a first rod body and a first stopper body which are connected with each other, the second piston rod comprises a second rod body and a second stopper body which are connected with each other, the first rod body is arranged at one side far away from the second piston rod and is separated from the inner wall of the first cavity, the first stopper body is arranged at one side close to the second piston rod and is slidably abutted against the inner wall of the first cavity, the second rod body is arranged at one side close to the first stopper body and is separated from the inner wall of the first cavity and the second cavity, and the second stopper body is arranged at one side far away from the second stopper body and is slidably abutted against the inner wall of the second cavity.

3. The dual-section cylinder of claim 2, wherein a first sealing member is disposed at an end of the first cavity away from the second cavity, the first sealing member being disposed circumferentially between the first rod and the cylinder body.

4. The double-section oil cylinder as set forth in claim 1, wherein a second sealing member is disposed in the cylinder body, the second sealing member separates a cavity in the cylinder body into the first cavity and the second cavity, a through hole is disposed on the second sealing member, and the second piston rod penetrates through the through hole.

5. The dual-section cylinder of claim 4 wherein said cylinder body comprises a first housing and a second housing that are joined to each other, said first housing forming said first cavity and said second housing forming said second cavity.

6. The dual-section oil cylinder as set forth in any one of claims 1-5, wherein the cylinder body is provided with a first oil discharge hole and a first oil inlet hole which are communicated with the first cavity, and a second oil discharge hole and a second oil inlet hole which are communicated with the second cavity.

7. The double-section oil cylinder of claim 6, wherein the first oil discharging hole, the first oil inlet hole, the second oil discharging hole and the second oil inlet hole are sequentially arranged on the same side face of the cylinder body along the length direction of the cylinder body.

8. The double-section oil cylinder of claim 6, wherein the apertures of the outward side of the first oil discharging hole, the first oil inlet hole, the second oil discharging hole and the second oil inlet hole are larger than the aperture of the inward side.

9. The two-joint cylinder as set forth in claim 6, wherein an end surface of the second piston rod, which is close to the first piston rod, is adapted to abut against the first piston rod, and a first groove extending from an edge opposite to the first oil inlet hole toward the center is provided on the end surface.

10. The dual-section oil cylinder of claim 6, wherein a second groove extending from the second oil inlet hole to the center is formed in one surface of the second cavity away from the first cavity.