CN217842206U

CN217842206U - Multi-piston hydraulic cylinder

Info

Publication number: CN217842206U
Application number: CN202222157014.7U
Authority: CN
Inventors: 冯保海
Original assignee: Individual
Current assignee: Individual
Priority date: 2022-08-16
Filing date: 2022-08-16
Publication date: 2022-11-18
Anticipated expiration: 2032-08-16

Abstract

The utility model discloses a many pistons pneumatic cylinder, including cylinder body, a plurality of piston, piston rod. The cylinder body is cylindrical and is provided with an inner cavity. The plurality of pistons are sleeved on the piston rod in an array mode, and the plurality of pistons are sealed in the inner cavity. The piston rod is provided with an oil guide channel, and is also provided with a plurality of first oil guide ports communicated with the oil guide channel, and the first oil guide ports are positioned between two adjacent pistons. A sealing assembly is arranged between the piston and the piston rod, and a sealing assembly is also arranged between the piston and the cylinder body. In this device, exert pressure to a plurality of pistons through leading oil passageway, first hydraulic fluid port of leading, for the pressure device of a piston of traditional technique, can increase the pressurized area of pressure, can improve this device pressure, use this device on the main equipment, same bore, this device can realize bigger output.

Description

Multi-piston hydraulic cylinder

Technical Field

The utility model relates to a linear drive technical field, in particular to many piston pneumatic cylinders.

Background

The hydraulic (pneumatic) cylinder is an actuating element in a hydraulic (pneumatic) transmission system, and is an energy conversion device for converting hydraulic (pneumatic) energy into mechanical energy. The hydraulic (pneumatic) motor performs a continuous rotary motion, while the hydraulic (pneumatic) cylinder performs a reciprocating motion. The hydraulic (pneumatic) cylinder has three types of piston cylinder and swing cylinder, and the piston cylinder and plunger cylinder realize reciprocating linear motion. The hydraulic (pneumatic) cylinders may be used singly, or in combination of two or more of them or with other mechanisms. To accomplish a particular function. The hydraulic (pneumatic) cylinder has simple structure and reliable operation, and is widely applied to a hydraulic (pneumatic) system of a machine tool.

However, the conventional hydraulic (pneumatic) cylinder has insufficient force and cannot be used under high-strength operation.

SUMMERY OF THE UTILITY MODEL

According to an aspect of the present invention, there is provided a multi-piston hydraulic cylinder, including

The cylinder body is provided with an inner cavity;

a plurality of pistons arrayed in the inner chamber;

a piston rod connecting the plurality of pistons,

the piston rod is provided with an oil guide channel, and is also provided with a plurality of first oil guide ports communicated with the oil guide channel, and the first oil guide ports are positioned between two adjacent pistons.

The utility model provides a can carry out straight reciprocating motion's device. In this device, exert pressure to a plurality of pistons through leading oil duct, first oil mouth of leading, for the pressure device of a piston of traditional art, can increase the pressurized area of pressure, can improve this device pressure, use this device on the main equipment, same bore, this device can realize bigger output power.

In some embodiments, one end of the cylinder block is provided with a first oil hole, and the other end of the cylinder block is provided with a second oil hole.

Therefore, the pressure is fed and discharged through the first oil hole and the second oil hole.

In some embodiments, the oil guide channel extends along the length direction of the piston rod, and a plurality of first oil guide ports are arrayed on the outer wall of the piston rod along the length direction of the piston rod.

Therefore, the oil guide channel and the first oil guide port are arranged as described above, and pressure can be poured to the stress surface of each piston.

In some embodiments, one end of the piston rod penetrates through the cylinder body, the other end of the piston rod is closed in the cylinder body, and one end of the piston rod closed in the cylinder body is provided with a second oil guide port which is communicated with the oil guide channel.

Thereby, the piston rod is arranged as described above.

In some embodiments, one end of the piston close to the second oil guide port is a plane, and one end of the piston far away from the second oil guide port is provided with an inclined surface.

Thus, the inclined surface of the piston is provided with a taper.

In some embodiments, the cylinder body comprises a sleeve, a cylinder bottom and a guide sleeve, the cylinder bottom and the guide sleeve are respectively arranged at two ends of the sleeve,

thus, the cylinder block is composed of the above structure.

In some embodiments, the first oil hole is formed in the outer wall of the sleeve and located at one end close to the guide sleeve, and the second oil hole is formed in the cylinder bottom.

Therefore, the first oil hole and the second oil hole are inlet and outlet holes of the power source, and accordingly the purpose is achieved.

In some embodiments, there are more than two pistons.

Thus, by providing two or more pistons, the pressure receiving area of the pistons can be increased, and the pulling force or pushing force of the piston rod can be increased.

Drawings

Fig. 1 is a schematic plan view of a multi-piston hydraulic cylinder according to an embodiment of the present invention.

Fig. 2 is a schematic plan view of a multi-piston hydraulic cylinder according to another embodiment of the present invention.

Reference numbers in the figures: 100-cylinder body, 101-first oil hole, 102-second oil hole, 110-sleeve, 120-cylinder bottom, 130-guide sleeve, 200-piston, 210-oil guide channel, 220-first oil guide port, 230-second oil guide port and 300-piston rod.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

Example one

Fig. 1 schematically shows a multi-piston hydraulic cylinder according to an embodiment of the present invention, which includes a cylinder body 100, a plurality of pistons 200, and a piston 200 rod. The cylinder 100 is cylindrical and has an inner cavity. The pistons 200 are sleeved on the piston 200 rod in an array mode, and the pistons 200 are sealed in the inner cavity. The piston 200 rod is provided with an oil guide channel 210, the piston 200 rod is further provided with a plurality of first oil guide ports 220 communicated with the oil guide channel 210, and the first oil guide ports 220 are located between two adjacent pistons 200. A sealing assembly is provided between the piston 200 and the rod of the piston 200, and a sealing assembly is also provided between the piston 200 and the cylinder 100.

In this device, lead oil duct 210, first oil guide port 220 through and exert pressure to a plurality of pistons 200, for the pressure device of a piston 200 of traditional technique, can increase the pressurized area of pressure, can improve this device pressure, use this device on the main equipment, same bore, this device can realize bigger output power.

Referring to fig. 1, a first oil hole 101 is formed at a front end of an outer wall of a cylinder block 100, and a second oil hole 102 is formed at a rear end surface of the cylinder block 100. Pressure is applied to and discharged from the first oil hole 101 and the second oil hole 102.

Referring to fig. 1, the oil guide passage 210 extends along the length direction of the piston 200, and a plurality of first oil guide ports 220 are arrayed on the outer wall of the piston 200 along the length direction of the piston 200. The oil guide passage 210 and the first oil guide port 220 are arranged as described above, and pressure can be injected to the force bearing surface of each piston 200.

Referring to fig. 1, the front end of the rod of the piston 200 penetrates through the cylinder 100, the rear end of the rod of the piston 200 is closed in the cylinder 100, one end of the rod of the piston 200, which is closed in the cylinder 100, is provided with a second oil guide port 230, and the second oil guide port 230 is communicated with the oil guide passage 210. The piston 200 rod is arranged as described above.

Referring to fig. 1, an end of the piston 200 close to the second oil guide port 230 is a plane, and an end of the piston 200 far from the second oil guide port 230 is provided with an inclined surface. The inclined surface of the piston 200 is tapered.

Referring to fig. 1, the cylinder body 100 includes a sleeve 110, a cylinder bottom 120, and a guide sleeve 130, the guide sleeve 130 and the cylinder bottom 120 are respectively disposed at front and rear ends of the sleeve 110, and the cylinder body 100 is composed of the above-mentioned structure. The rear end of the sleeve 110 is provided with threads, and the sleeve 110 is coupled to the rear end of the sleeve 110 by the threads and is fixedly sealed by welding. The front end of the sleeve 110 is provided with threads, the guide sleeve 130 is connected to the front end of the sleeve 110 by the threads, and the sleeve 110 forms a seal with the sleeve 110 by a sealing assembly.

Referring to fig. 1, the first oil hole 101 is formed in the outer wall of the sleeve 110 and located at an end close to the guide sleeve 130, i.e., the front end of the outer wall of the sleeve 110; the second oil hole 102 is provided in the cylinder bottom 120, i.e., the rear end of the cylinder block 100. The first oil hole 101 and the second oil hole 102 are inlet and outlet holes of a power source, and accordingly the purpose is achieved.

Referring to fig. 1, two or more pistons 200 are provided. By providing two or more pistons 200, the pressure receiving area of the pistons 200 can be increased, thereby increasing the pulling or pushing force of the piston 200 rod.

In this embodiment, three pistons 200 are provided. The three pistons 200 are sleeved on the piston 200 rod in an array manner, two first oil guide ports 220 are arranged on the outer wall of the piston 200 rod, and the first oil guide ports 220 are located between two adjacent pistons 200. When the piston 200 rod is pushed out, the second oil hole 102 is inputted with a pressure source, the pressure source firstly acts on the piston 200 closest to the second oil hole 102, the pressure source presses the other piston 200 through the second oil guide port 230 and the oil guide passage 210, so that the piston 200 rod is pushed out, and the thrust of the device is increased by increasing the stress area.

This many piston pneumatic cylinder can use hydraulic pressure as the power supply, perhaps uses atmospheric pressure as the power supply, does not do the restriction here, only needs to carry out rational design or change with the assorted seal assembly of power supply can.

Example two

The present embodiment has the same structure as the embodiment except for the number of pistons 200 and the number of first oil guide ports 220.

Referring to fig. 2, the pistons 200 are provided with five. The five pistons 200 are sleeved on the piston 200 rod in an array manner, four first oil guide ports 220 are arranged on the outer wall of the piston 200 rod, and each first oil guide port 220 is located between two adjacent pistons 200. When the piston 200 is pushed out, the second oil hole 102 inputs a pressure source, the pressure source firstly acts on the piston 200 closest to the second oil hole 102, and the pressure source presses another piston 200 through the second oil guide port 230 and the oil guide channel 210, so as to push the piston 200 to be pushed out, and the thrust of the device is increased by increasing the stressed area.

In other embodiments, the number of pistons 200 may be provided in plurality, and any number of pistons can be provided within the allowable range.

What has been described above are only some embodiments of the invention. For those skilled in the art, without departing from the inventive concept, several modifications and improvements can be made, which are within the scope of the invention.

Claims

1. A multi-piston hydraulic cylinder is characterized by comprising

The cylinder body (100) is provided with an inner cavity;

a plurality of pistons (200) arrayed in the interior chamber;

a piston (200) rod connecting a plurality of said pistons (200),

the oil guide device is characterized in that an oil guide channel (210) is arranged on the piston (200) rod, a plurality of first oil guide ports (220) communicated with the oil guide channel (210) are further arranged on the piston (200) rod, and the first oil guide ports (220) are located between every two adjacent pistons (200).

2. A multi-piston hydraulic cylinder according to claim 1, wherein one end of the cylinder block (100) is provided with a first oil hole (101), and the other end of the cylinder block (100) is provided with a second oil hole (102).

3. A multi-piston hydraulic cylinder according to claim 2, wherein the oil guide passage (210) extends along the length direction of the piston (200), and the first oil guide ports (220) are arrayed on the outer wall of the piston (200) along the length direction of the piston (200).

4. A multi-piston hydraulic cylinder as claimed in claim 2, wherein one end of the rod of the piston (200) penetrates through the cylinder body (100), the other end of the rod of the piston (200) is sealed in the cylinder body (100), one end of the rod of the piston (200) sealed in the cylinder body (100) is provided with a second oil guide port (230), and the second oil guide port (230) is communicated with the oil guide passage (210).

5. A multi-piston hydraulic cylinder as claimed in claim 4, wherein the end of the piston (200) close to the second oil guide port (230) is provided with a flat surface, and the end of the piston (200) far from the second oil guide port (230) is provided with an inclined surface.

6. A multi-piston hydraulic cylinder according to any one of claims 2-5, characterized in that the cylinder body (100) comprises a sleeve (110), a cylinder bottom (120) and a guide sleeve (130), and the cylinder bottom (120) and the guide sleeve (130) are respectively arranged at two ends of the sleeve (110).

7. A multi-piston hydraulic cylinder as claimed in claim 6, wherein the first oil hole (101) is provided in the outer wall of the sleeve (110) at an end close to the guide sleeve (130), and the second oil hole (102) is provided in the cylinder bottom (120).

8. A multi-piston hydraulic cylinder according to claim 7, characterized in that there are more than two pistons (200).