CN217421697U

CN217421697U - Hydraulic cylinder with mechanical self-locking mechanism

Info

Publication number: CN217421697U
Application number: CN202221102758.2U
Authority: CN
Inventors: 袁帅; 梁友哲; 何蕾; 代春茹; 许孝龙
Original assignee: Tianjin Hongxuanda Technology Co ltd; Yizhong Group Tianjin Technology Research And Development Co ltd; Yizhong Group Tianjin Tunnel Engineering Co ltd
Current assignee: Tianjin Hongxuanda Technology Co ltd; Yizhong Group Tianjin Technology Research And Development Co ltd; Yizhong Group Tianjin Tunnel Engineering Co ltd
Priority date: 2022-04-25
Filing date: 2022-04-25
Publication date: 2022-09-13
Anticipated expiration: 2032-04-25

Abstract

The utility model discloses a hydraulic cylinder with a mechanical self-locking mechanism, which comprises a cylinder body component, a hydraulic rod component and a locking mechanism, wherein both ends of the cylinder body component are respectively provided with a first oil hole and a second oil hole which can be respectively connected with a hydraulic system so as to realize the control of the hydraulic pressure in the cylinder body; the hydraulic rod assembly is slidably sleeved in the cylinder body assembly and is provided with a first sealing part, the inside of the cylinder body assembly is divided into a first oil chamber and a second oil chamber through the first sealing part, and the first oil hole and the second oil hole are respectively communicated with the first oil chamber and the second oil chamber. The locking mechanism is arranged at the first oil cavity of the cylinder body component and is provided with a locking pin which can radially extend out or retract into the inner surface of the cylinder body component along with the change of the hydraulic pressure in the first oil cavity, the hydraulic rod component is provided with a locking hole or a locking groove which can be matched with the locking pin, and the bottom of the locking hole or the locking groove is provided with a first through hole structure communicated with the first oil cavity.

Description

Hydraulic cylinder with mechanical self-locking mechanism

Technical Field

The invention relates to the technical field of hydraulic oil cylinders, in particular to a hydraulic oil cylinder with a mechanical self-locking mechanism.

Background

Hydraulic rams are important components of hydraulic machines, and are often used as actuators of hydraulic machines, and during operation, the hydraulic rams convert hydraulic energy into mechanical energy, thereby driving moving elements to perform a set action or function. Hydraulic rams of the prior art typically include a cylinder and a hydraulic rod, which are typically connected to a moving element and a base, respectively. During operation, hydraulic oil in the cylinder body generates hydraulic pressure through compression to push the hydraulic rod to move towards the opposite side, and when the hydraulic pressure and external force borne by the hydraulic rod reach balance, the hydraulic rod stops moving and keeps relatively static. Such prior art hydraulic rams suffer from the following disadvantages: when the hydraulic pressure and the external force applied to the hydraulic rod reach balance, namely the hydraulic rod is stressed to keep relatively static, the hydraulic rod is often stressed to be balanced and invalid due to leakage of hydraulic oil, and the hydraulic rod is further accidentally moved. Which is not allowed in many cases. Therefore, the technical defect that the hydraulic rod of the hydraulic oil cylinder accidentally moves due to leakage of hydraulic oil in a stress balance state is overcome, and the research and development of the hydraulic machine are already problems.

Disclosure of Invention

To above technical defect, the utility model provides a hydraulic cylinder with machinery is from locking mechanism, when the hydraulic stem area load motion reaches balance, link together hydraulic stem and cylinder body through machinery self-locking mechanism, produce the mechanical force between self-locking mechanism and hydraulic stem and cylinder body for the compensation is because hydraulic pressure loss that hydraulic oil revealed and cause, thereby when the hydraulic stem atress keeps static relatively, the technical defect of the unexpected removal of hydraulic stem that causes because of hydraulic oil reveals of existence has effectively been solved.

In order to realize the technical purpose, the utility model discloses a following technical scheme realizes, a pneumatic cylinder with mechanical self-locking mechanism, include: the hydraulic cylinder comprises a cylinder body assembly, a hydraulic rod assembly and a locking mechanism, wherein a first oil hole and a second oil hole are formed in two ends of the cylinder body assembly respectively and can be connected with a hydraulic system respectively so as to control the hydraulic pressure in the cylinder body; the hydraulic rod assembly is slidably sleeved in the cylinder body assembly and is provided with a first sealing part, the inside of the cylinder body assembly is divided into a first oil chamber and a second oil chamber through the first sealing part, and the first oil hole and the second oil hole are respectively communicated with the first oil chamber and the second oil chamber. In work, under the action of the hydraulic pressure difference between the first oil chamber and the second oil chamber, the hydraulic rod assembly performs reciprocating telescopic motion along the cylinder body assembly. The locking mechanism is arranged at the first oil cavity part of the cylinder body component and is provided with a locking pin which can radially extend out or retract into the inner surface of the cylinder body component along with the change of the hydraulic pressure in the first oil cavity, and when the hydraulic pressure in the first oil cavity is reduced, the locking pin extends out; otherwise, the device is gradually retracted. The hydraulic rod component is provided with a locking hole or a locking groove which can be matched with the locking pin, and the bottom of the locking hole or the locking groove is provided with a first through hole structure communicated with the first oil cavity so as to ensure that the bottom of the locking pin can bear the hydraulic pressure of the first oil cavity. In operation, when hydraulic oil is injected into the second oil cavity step by step through the second oil hole, the hydraulic pressure of the second oil cavity is increased, the hydraulic rod assembly is pushed to slide towards the first oil cavity step by step, meanwhile, the hydraulic pressure in the first oil cavity is reduced, the hydraulic rod assembly retracts to a preset position, the locking pin radially extends out of the inner surface of the cylinder body assembly and is inserted into the locking hole or the locking groove, and the hydraulic rod assembly and the cylinder body assembly are connected together. Even if hydraulic oil leaks from the hydraulic cylinder at the moment, the locking pin can bear certain mechanical force and can be used for offsetting the loss of the hydraulic force, so that the technical defect that the hydraulic rod assembly is accidentally moved due to the leakage of the hydraulic oil can be effectively overcome. On the contrary, when hydraulic oil is injected into the first oil chamber through the first oil hole, the hydraulic pressure in the first oil chamber is increased, the locking pin is radially retracted into the inner surface of the cylinder body assembly under the action of the hydraulic pressure, and then the hydraulic rod assembly starts to slide towards the second oil chamber and extend out of the cylinder body assembly.

As a further improvement, the locking mechanism further comprises a second sealing component for sealing between the locking mechanism and the cylinder component, so as to prevent the leakage of the hydraulic oil from the connection between the locking mechanism and the cylinder component. The locking pin is provided with a mounting structure matched with the second sealing assembly, the second sealing assembly is sleeved on the locking pin, and the outer ring of the second sealing assembly is in close contact with the cylinder body assembly to achieve a sealing effect.

In order to ensure that the locking pin can be completely extended or retracted in work so as to ensure the connection effect and strength of the hydraulic assembly and the cylinder assembly, the locking mechanism further comprises a limiting structure and a compression spring, wherein the limiting structure comprises a mounting hole and a limiting plug which are arranged on the cylinder assembly, the limiting plug and the locking pin are both mounted in the mounting hole, the compression spring is mounted between the locking pin and the limiting plug, and the spring pressure born by the locking pin is adapted to the hydraulic pressure in the first oil cavity; spacing stopper fixed mounting is in the mounting hole, and the fitting pin can be followed mounting hole endwise slip and installed in the mounting hole, and spacing stopper and fitting pin all are connected with compression spring, and the compressible length of compression spring suits with the protractile length of fitting pin.

As a further improvement of the utility model, in order to effectively prevent the locking pin from being separated from the mounting hole during the operation, the mounting hole is a stepped hole, and in order to further facilitate the installation, the diameter of the stepped mounting hole is reduced in sequence from the outer surface to the inner surface along the radial direction of the cylinder body assembly; the locking mechanism is of a stepped shaft structure matched with the mounting hole, a locking pin of the locking mechanism is provided with a pin head end, and the pin head end is in contact with the hydraulic rod assembly in work.

As the utility model discloses a further improvement, foretell fitting pin is provided with the guide post with compression spring's connection position, and the guide post suit is at the compression spring inner circle for compression spring location and direction.

As the utility model discloses a further improvement, the round pin head end of foretell fitting pin, its head are arc spherical surface structure to ensure in the work, can reduce the wearing and tearing when round pin head end and the hydraulic stem relative movement of fitting pin.

As a further improvement of the present invention, the above-mentioned stopper is provided with a second through hole structure which can be communicated with the outside, so that the space where the above-mentioned compression spring is located is always communicated with the atmosphere, thereby preventing the compression spring from bearing the adverse effect caused by the change of the located space during the work. In order to prevent the risk of blocking the second through hole by dust or other foreign matters during use of the hydraulic oil cylinder, the second through hole structure is connected with an atmosphere end, is preferably arranged on the side surface of the limiting plug, and is further preferably uniformly distributed on the circumference of more than two. And the end of the space where the connecting spring is located is preferably arranged on the end surface of the limiting plug.

As the utility model discloses a further improvement, foretell first through-hole structure reaches along the perforating hole of hydraulic stem subassembly radial link up locking hole or locking groove bottom for setting up the centre bore at hydraulic stem subassembly terminal surface.

Compared with the prior art, the beneficial effects of the utility model are that: the utility model relates to a pneumatic cylinder with machinery self-locking mechanism has not only effectively solved the pneumatic cylinder existence of prior art: under the stress balance state, the hydraulic rod is often in stress balance failure caused by leakage of hydraulic oil, and the technical defect that the hydraulic rod moves accidentally is further caused. In work, the locking mechanism can be automatically locked or unlocked along with the change of the hydraulic pressure in the first oil cavity, an additional intervention system is not needed, and the locking mechanism is economical, simple and convenient.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a partial enlarged view of the present invention;

FIG. 3 is a schematic view of the locking pin of the present invention;

fig. 4 is a schematic structural view of the stopper component of the present invention.

In the figure, 1, a cylinder block assembly, 11, a mounting hole, 2, a second oil cavity, 3, a first oil cavity, 4, a first oil hole, 5, a second oil hole, 6, a locking mechanism, 61, a limiting structure, 612, a limiting plug, 6121, a second through hole structure, 6122, a limiting plug side face, 6123, a limiting plug end face, 62, a compression spring, 63, a second sealing assembly, 64, a locking pin, 641, a guide column, 642, a second sealing assembly mounting structure, 643, a pin head end, 644, a pin head end head, 7, a locking hole or locking groove, 8, a first through hole structure, 81, a central hole, 82, a through hole, 9, a first sealing part and 10 hydraulic rod assemblies are arranged.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention more comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The invention may be embodied in many other forms different from that described herein and similar modifications may be made by those skilled in the art without departing from the spirit and scope of the invention. Accordingly, the present invention is not limited by the specific embodiments disclosed below.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," "front," "rear," and the like as used herein are for illustrative purposes only and do not denote a single embodiment.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

As shown in fig. 1, the utility model relates to a pneumatic cylinder with mechanical self-locking mechanism, include: the hydraulic cylinder comprises a cylinder body assembly 1, a hydraulic rod assembly 10 and a locking mechanism 6, wherein the hydraulic rod assembly 10 is slidably sleeved in the cylinder body assembly 1 and is provided with a first sealing part 9, and the first sealing part 9 divides the interior of the cylinder body assembly into a front oil chamber and a rear oil chamber which are respectively a first oil chamber 3 and a second oil chamber 2. The cylinder block assembly 1 is provided with a first oil hole 4 and a second oil hole 5, one end of which is connected to a hydraulic system, and the other end of which is connected to the first oil chamber 3 and the second oil chamber 2. In operation, when the hydraulic pressure in the first oil chamber 3 is different from that in the second oil chamber 2, the hydraulic pressure difference between the first oil chamber and the second oil chamber pushes the hydraulic rod assembly 10 to do reciprocating linear telescopic motion along the inner surface of the cylinder body assembly. The locking mechanism 6 is arranged at the first oil cavity 3 part of the cylinder body component 1 and is provided with a locking pin 64 which can radially extend out or retract into the inner surface of the cylinder body component 1 along with the change of the hydraulic pressure in the first oil cavity 3, and when the hydraulic pressure in the first oil cavity 3 is gradually reduced, the locking pin 64 gradually extends out; otherwise, the device is gradually retracted. The hydraulic rod assembly 10 is provided with a locking hole or a locking groove 7 which can be matched with the locking pin 64, and the bottom of the locking hole or the locking groove 7 is provided with a first through hole structure 8 communicated with the first oil cavity 3 so as to ensure that the bottom of the locking pin 64 can bear the hydraulic pressure of the first oil cavity 3.

In operation, when hydraulic oil is gradually injected into the second oil chamber 2 through the second oil hole 5, the hydraulic pressure in the second oil chamber 2 is increased, the hydraulic rod assembly 10 is pushed to gradually slide towards the first oil chamber 3, meanwhile, the hydraulic pressure in the first oil chamber 3 is reduced, the hydraulic rod assembly 10 retracts to a preset position, the locking pin 64 radially extends out of the inner surface of the cylinder body assembly 1 and is inserted into the locking hole or the locking groove 9, and the hydraulic rod assembly 10 and the cylinder body assembly 1 are connected together. Even if the hydraulic oil in the hydraulic cylinder leaks, the locking pin 64 can bear a certain mechanical force to offset the loss of the hydraulic force, so that the technical defect that the hydraulic rod assembly 10 accidentally moves due to the leakage of the hydraulic oil can be effectively overcome. On the contrary, when the hydraulic oil is injected into the first oil chamber through the first oil hole, the hydraulic pressure in the first oil chamber increases, the locking pin 64 is radially retracted into the inner surface of the cylinder block assembly 1 by the hydraulic pressure, and then the hydraulic rod assembly 10 starts to slide into the second oil chamber and extend out of the cylinder block assembly.

As shown in fig. 2, the locking mechanism 6 further includes a limiting structure 61 and a compression spring 62, wherein the limiting structure 61 includes a mounting hole 11 and a limiting plug 612 which are arranged on the cylinder assembly, the limiting plug 612 and the locking pin 64 are both mounted in the mounting hole 11, the compression spring 62 is mounted between the locking pin 64 and the limiting plug 612, and the spring pressure borne by the locking pin 64 should be adapted to the hydraulic pressure in the first oil chamber 3; the limiting plug 612 is fixedly installed in the installation hole 11, the locking pin 64 can be installed in the installation hole 11 in an axial sliding mode along the installation hole 11, the limiting plug 612 and the locking pin 64 are both connected with the compression spring 62, and the compressible length of the compression spring 62 is matched with the extendable length of the locking pin 64.

As shown in fig. 1 and 2, the locking mechanism further includes a second sealing assembly 63, the locking pin 64 is provided with a mounting structure 642 adapted to the second sealing assembly, the second sealing assembly 63 is sleeved on the locking pin 64, and an outer ring of the second sealing assembly is in close contact with the cylinder assembly 1, so as to achieve a sealing effect.

As shown in fig. 1 and 2, the mounting hole 11 is a stepped hole, and the diameter of the stepped hole decreases from the outer surface to the inner surface along the radial direction of the cylinder block assembly 1; the locking mechanism 6 has a stepped shaft structure corresponding to the mounting hole 11. As shown in fig. 3, the locking pin 64 is provided with a pin head 643 and a guide post 641, the pin head 643 is in contact with the hydraulic rod assembly 10 during operation, and the head 644 is in arc spherical structure, so as to ensure that the wear of the pin head 643 of the locking pin 64 and the hydraulic rod assembly 10 during relative movement can be reduced during operation. The guiding post 641 is sleeved on the inner ring of the compression spring 62 for positioning and guiding the compression spring 62.

As shown in fig. 1 and 2, the first through hole structure 8 is a central hole 81 disposed on an end surface of the hydraulic rod assembly 10, and a through hole 82 penetrating the locking hole or the bottom of the locking groove along the radial direction of the hydraulic rod assembly.

As shown in fig. 1, 2 and 4, in order to ensure that the space where the compression spring 62 is located is always communicated with the atmosphere, a second through hole structure 6121 that can be communicated with the outside is formed on the limiting plug 612. In order to prevent the risk that the second through hole structure 6121 is blocked by dust or other foreign matters when the hydraulic oil cylinder is in use, the second through hole structure 6121 is connected to an atmosphere end, preferably arranged on the side surface 6122 of the limit plug, and further preferably evenly distributed on the circumference in more than two rows. And the end of the space where the connecting spring is located is preferably arranged on the end face 6123 of the limit plug.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art will understand that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the embodiments of the present invention.

Claims

1. A hydraulic cylinder with a mechanical self-locking mechanism, comprising: the hydraulic cylinder comprises a cylinder body assembly and a hydraulic rod assembly, wherein a first oil hole and a second oil hole are formed in two ends of the cylinder body assembly respectively and can be connected with a hydraulic system respectively; the hydraulic rod assembly is slidably sleeved in the cylinder body assembly and is provided with a first sealing part, and the inside of the cylinder body assembly is divided into a first oil chamber and a second oil chamber through the first sealing part; the first oil hole and the second oil hole are respectively communicated with the first oil chamber and the second oil chamber; the method is characterized in that: the locking mechanism is arranged at the first oil cavity part of the cylinder body assembly and is provided with a locking pin which can radially extend out or retract into the inner surface of the cylinder body assembly along with the change of the hydraulic pressure in the first oil cavity; the hydraulic rod assembly is provided with a locking hole or a locking groove which can be matched with the locking pin, and the bottom of the locking hole or the locking groove is provided with a first through hole structure communicated with the first oil cavity.

2. A hydraulic cylinder with mechanical self-locking mechanism according to claim 1, characterized in that: the locking mechanism further comprises a second sealing assembly, the locking pin is provided with a mounting structure matched with the second sealing assembly, the second sealing assembly is sleeved on the locking pin, and the outer ring of the second sealing assembly is in close contact with the cylinder body assembly.

3. The hydraulic cylinder with the mechanical self-locking mechanism according to any one of claims 1 or 2, wherein: the locking mechanism comprises a limiting structure and a compression spring, wherein the limiting structure comprises a mounting hole and a limiting plug which are arranged on the cylinder body assembly, the limiting plug and the locking pin are both arranged in the mounting hole, the compression spring is arranged between the locking pin and the limiting plug, and the spring pressure born by the locking pin is adapted to the hydraulic pressure in the first oil cavity; spacing stopper fixed mounting is in the mounting hole, and the fitting pin can be followed mounting hole endwise slip and installed in the mounting hole, and spacing stopper and fitting pin all are connected with compression spring, and the compressible length of compression spring suits with the protractile length of fitting pin.

4. A hydraulic cylinder with mechanical self-locking mechanism according to claim 3, characterized in that: the connecting part of the locking pin and the compression spring is provided with a guide column, and the guide column is sleeved on the inner ring of the compression spring.

5. A hydraulic cylinder with mechanical self-locking mechanism according to claim 3, characterized in that: the mounting hole is a stepped hole, and the hole diameter of the mounting hole is reduced from the outer surface to the inner surface along the radial direction of the cylinder body assembly; the locking mechanism is of a stepped shaft structure matched with the mounting hole, the locking pin is provided with a pin head end, and the pin head end is in contact with the hydraulic rod assembly in work.

6. A hydraulic cylinder with mechanical self-locking mechanism according to claim 5, characterized in that: the head of the pin head is of an arc spherical structure.

7. A hydraulic cylinder with mechanical self-locking mechanism as defined in claim 3 wherein: and a second through hole structure which can be communicated with the outside is formed on the limiting plug.

8. The hydraulic cylinder with mechanical self-locking mechanism of claim 7, wherein: the second through hole structure is connected with the atmosphere end and is arranged on the side surface of the limiting plug, and the second through hole structure is connected with the space end where the spring is located and is arranged on the end surface of the limiting plug.

9. The hydraulic cylinder with mechanical self-locking mechanism as set forth in any one of claims 1 or 2, wherein: the first through hole structure is a central hole arranged on the end face of the hydraulic rod component and a through hole which radially penetrates through the locking hole or the bottom of the locking groove along the hydraulic rod component.