阅读说明：本技术 一种油缸 (Oil cylinder ) 是由 张春晖 李锡晗 史伟 于 2019-10-25 设计创作，主要内容包括：本发明公开了一种油缸,为了解决传统油缸的活塞两端容易发生液压油泄漏的问题,提出了一种具有并排的双活塞腔以及四工作腔的油缸结构,将位于中间位置的两个工作腔连接油路,以用于液压油的进出而实现驱动,并通过加设的油封和耐磨环实现一次密封,而另外两个工作腔则可以设置为空腔,也可以设置其他元件,并且再次加设油封和耐磨环实现二次密封,这样,即使在油缸使用的过程中连接油路的两个工作腔发生类似于传统油缸中的液压油泄漏问题,位于两端的工作腔也可以发挥二次防漏的功能,从而避免液压油外泄,伸出于缸体的活塞杆部分不会带有液压油,更不会发生液压油泄漏后的一系列问题。(The invention discloses an oil cylinder, which aims to solve the problem that hydraulic oil is easy to leak at two ends of a piston of the traditional oil cylinder, provides an oil cylinder structure with two piston cavities and four working cavities which are arranged side by side, connects two working cavities positioned in the middle position with an oil way, is used for the inlet and outlet of hydraulic oil to realize the drive, and realizes the primary sealing through the additionally arranged oil seal and the wear-resisting ring, the other two working chambers can be arranged as cavities or other elements, and oil seals and wear-resisting rings are additionally arranged to realize secondary sealing, so that, even if the two working chambers connected with the oil circuit have the leakage problem similar to the hydraulic oil leakage problem in the traditional oil cylinder in the using process of the oil cylinder, the working chambers at the two ends can also play the function of secondary leakage prevention, thereby avoiding the hydraulic oil to leak, and the piston rod part that stretches out in the cylinder body can not have hydraulic oil, can not take place a series of problems after the hydraulic oil leaks even more.)

1. The oil cylinder is characterized by comprising a cylinder body, wherein two piston cavities are arranged in the cylinder body side by side, a piston rod (100) penetrating through the two piston cavities is arranged, the piston rod (100) is arranged in each piston cavity and is provided with a piston, so that the two piston cavities are divided into four working cavities which are adjacent in sequence, the working cavities in the middle are connected with oil ways, and at least one of the rest working cavities is not connected with the oil ways.

2. The oil cylinder according to claim 1, characterized in that the piston cavity comprises a first piston cavity and a second piston cavity, the piston comprises a first piston (101) and a second piston (102), the first piston (101) is arranged in the first piston cavity, the first piston (101) divides the first piston cavity into a fourth working cavity (203) and a third working cavity (202), the second piston (102) is arranged in the second piston cavity, the second piston (102) divides the second piston cavity into a second working cavity (201) and a first working cavity (200), the second working cavity (201) and the third working cavity (202) are connected with an oil passage, and the first working cavity (200) and the fourth working cavity (203) are not connected with the oil passage.

3. A cylinder according to claim 2, characterized in that the cylinder comprises a first cylinder (103), a second cylinder (104) and a third cylinder (105), the first cylinder (103) being located between the second cylinder (104) and the third cylinder (105).

4. A cylinder according to claim 3, characterized in that the first cylinder (103) is recessed and abuts the piston rod (100) to form the first and second piston chambers.

5. A cylinder according to claim 4, characterized in that the first cylinder (103) is provided with wear and sealing means abutting the side walls of the piston rod (100).

6. A cylinder according to claim 5, characterized in that the second cylinder (104) is provided with wear and sealing means abutting the side walls of the piston rod (100).

7. A cylinder according to claim 6, characterized in that the first piston (101) is provided with wear and sealing means abutting the side walls of the first cylinder (103).

8. A cylinder according to claim 7, characterized in that the second piston (102) is provided with wear and sealing means abutting the side wall of the third cylinder (105).

9. A cylinder according to claim 2, 3, 4, 5, 6, 7 or 8, characterized in that a first muffler (501) is provided on the cylinder body, the first muffler (501) communicating with the fourth working chamber (203).

10. The cylinder according to claim 9, wherein a second muffler (502) is further provided on the cylinder body, and the second muffler (502) communicates with the first working chamber (200).

Technical Field

The invention belongs to the technical field of machine tool equipment, and particularly relates to an oil cylinder.

Background

The conventional oil cylinder structure is shown in fig. 3, and comprises a large piston 600, a connecting rod 601, an oil cylinder body 602, an end cover 603, an oil inlet cavity 604 and an oil return cavity 605, wherein a piston cavity for mounting the large piston 600 is arranged in the oil cylinder body 602, the large piston 600 divides the piston cavity into the oil inlet cavity 604 and the oil return cavity 605, the piston is pushed to move by the circulation of hydraulic oil in the oil inlet cavity 604 and the oil return cavity 605, the large piston 600 drives the connecting rod 601 to move, in order to avoid the leakage of the hydraulic oil in the oil inlet cavity 604 and the oil return cavity 605, oil seals for avoiding the leakage of the hydraulic oil are arranged between the large piston 600 and the oil cylinder body 602, between the end cover 603 and the connecting rod 601, and between the oil cylinder body 602 and the connecting rod 601, however, along with the reasons of working wear or the sealing performance per se, the sealing function of the oil seals are not enough to exert the sealing effect, in some devices with high precision requirements, leaked hydraulic oil can pollute an optical detection element, so that detection results of related detection devices are influenced, misjudgment is caused, and further, a wrong instruction is sent out, and normal operation of the devices is influenced.

Disclosure of Invention

The present invention is directed to solving at least one of the problems of the prior art. Therefore, the invention provides an oil cylinder.

The oil cylinder comprises a cylinder body, wherein two piston cavities are arranged in the cylinder body side by side, a piston rod penetrating through the two piston cavities is arranged in the cylinder body, a piston is arranged in each piston cavity of the piston rod, so that the two piston cavities are divided into four working cavities which are adjacent in sequence, the two working cavities in the middle are connected with an oil way, and at least one of the rest working cavities is not connected with the oil way.

The oil cylinder provided by the embodiment of the invention at least has the following technical effects:

the invention aims to solve the problem that hydraulic oil is easy to leak at two ends of a piston of a traditional oil cylinder, provides an oil cylinder structure with two piston cavities and four working cavities which are arranged side by side, wherein each piston cavity is internally provided with a piston so as to obtain four working cavities which are adjacent in sequence, and based on the structure of the four working cavities, the invention connects two working cavities which are positioned at the middle position with an oil way for the inlet and the outlet of the hydraulic oil to realize driving, and realizes primary sealing by additionally arranging an oil seal and a wear-resisting ring, while the other two working cavities can be arranged as cavities, and can also be provided with other functional elements to realize other functions, and the additionally arranged oil seal and the wear-resisting ring realize secondary sealing, so that even if the two working cavities which are connected with the oil way in the use process of the oil cylinder have the hydraulic oil leakage problem which is similar to that of the traditional oil cylinder, the working cavities positioned at two ends can also play, therefore, hydraulic oil is prevented from leaking, hydraulic oil cannot be contained in the piston rod part extending out of the cylinder body, and a series of problems caused by leakage of the hydraulic oil cannot occur.

According to some embodiments of the present invention, the piston cavity includes a first piston cavity and a second piston cavity, the piston includes a first piston and a second piston, the first piston is disposed in the first piston cavity, the first piston divides the first piston cavity into a fourth working cavity and a third working cavity, the second piston is disposed in the second piston cavity, the second piston divides the second piston cavity into a second working cavity and a first working cavity, the second working cavity and the third working cavity are connected with an oil path, the first working cavity and the fourth working cavity are not connected with an oil path, driving is realized through the second working cavity and the third working cavity, and leakage prevention is realized through the first working cavity and the fourth working cavity.

According to some embodiments of the invention, the cylinder comprises a first cylinder, a second cylinder and a third cylinder, the first cylinder being located between the second cylinder and the third cylinder.

According to some embodiments of the invention, the first cylinder is recessed and abuts the piston rod, thereby forming the first piston chamber and the second piston chamber.

According to some embodiments of the invention, the first cylinder is provided with a wear and sealing mechanism at the side wall abutting the piston rod for forming a primary sealing structure.

According to some embodiments of the invention, the second cylinder body is provided with a wear and sealing mechanism at the side wall abutting the piston rod for forming a secondary sealing structure while extending the service life.

According to some embodiments of the invention, the first piston is provided with a wear and sealing mechanism at the side wall abutting the first cylinder for forming a primary sealing structure while extending the service life.

According to some embodiments of the invention, the second piston is provided with a wear and sealing mechanism abutting a side wall of the third cylinder for forming a primary sealing structure.

According to some embodiments of the invention, the cylinder body is provided with a first muffler, and the first muffler is communicated with the fourth working chamber, so that the fourth working chamber is communicated with the outside to eliminate negative pressure and reduce noise at the same time.

According to some embodiments of the invention, the cylinder body is further provided with a second muffler, and the second muffler is communicated with the first working cavity, so that the first working cavity is communicated with the outside to eliminate negative pressure and reduce noise at the same time.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The invention is further illustrated with reference to the following figures and examples:

FIG. 1 is a schematic view of a cylinder structure according to the present invention;

FIG. 2 is a schematic diagram of the cylinder operation of the present invention;

FIG. 3 is a schematic structural diagram of a conventional cylinder;

reference numerals:

the hydraulic cylinder comprises a piston rod 100, a first piston 101, a second piston 102, a first cylinder 103, a second cylinder 104, a third cylinder 105, a first working cavity 200, a second working cavity 201, a third working cavity 202, a fourth working cavity 203, a first oil seal 301, a second oil seal 302, a third oil seal 303, a first wear-resistant ring 401, a second wear-resistant ring 402, a third wear-resistant ring 403, a large piston 600, a connecting rod 601, a cylinder body 602, an end cover 603, an oil inlet cavity 604 and an oil return cavity 605.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.

In the description of the present invention, it should be understood that the orientation or positional relationship referred to in the description of the orientation, such as the upper, lower, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, the meaning of a plurality of means is one or more, the meaning of a plurality of means is two or more, and larger, smaller, larger, etc. are understood as excluding the number, and larger, smaller, inner, etc. are understood as including the number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.