PVC pipe hydraulic cylinder

Abstract

The present invention provides a PVC pipe hydraulic cylinder that can be obtained on the general market for the outer cylinder main member of a hydraulic cylinder, etc., uses a material that is inexpensive, has a low surface hardness, high corrosion resistance, and low friction, thereby achieving cost reduction in production, reduction of environmental load during use, and reduction of human load. 【Solution means】A PVC pipe standard material VP pipe for water supply is used as the cylinder tube 2, and a PVC pipe standard material TS cap for water supply is used for the head cover 1 and rod cover 3 of the cylinder. The TS cap with a smaller diameter than the cylinder tube diameter is grooved and an O-ring 5 is attached to form a piston 4.

Description

Technical Field

[0001] This invention relates to a hydraulic cylinder that uses a vinyl chloride pipe material as a main member.

Background Art

[0002] The outer cylinder member of the cylinder is made of metal or a material similar thereto that is processed and formed to ensure strength.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Patent Document 2

Non-Patent Documents

[0004]

Non-Patent Document 1

Non-Patent Document 2

Non-Patent Document 3

Non-Patent Document 4

Non-Patent Document 5

Summary of the Invention

Problems to be Solved by the Invention

[0005] Since the outer cylinder main member of the cylinder is made of metal, it is heavy, and rust prevention and lubrication functions are required for the working fluid. Also, a machining process is required for manufacturing, and the cost of the parts is high. Therefore, it is intended to solve the above-mentioned drawbacks by using a commercially available vinyl chloride pipe material for water supply as the main member.

Means for Solving the Problems

[0006] This invention solves the problem by applying a vinyl chloride pipe standard material for water supply that circulates in the general market to the main outer cylinder member of a hydraulic cylinder that uses generally available tap water or pressure water equivalent thereto as the working fluid.

Effects of the Invention

[0007] By using a vinyl chloride pipe standard material for the main cylinder outer cylinder member, the manufacture of a low-pressure (0.8 Mpa or less) hydraulic cylinder can be greatly simplified and the cost can be reduced. In addition, it becomes unnecessary to add a rust preventive lubricant to the working fluid. Further, since the surface hardness is low, the degree of damage caused by accidental collisions with the human body can be reduced. Furthermore, the processability and recyclability of the vinyl chloride pipe itself are excellent, and the environmental load can be reduced.

Brief Description of the Drawings

[0008]

Figure 1

Modes for Carrying Out the Invention

[0009] The designed cylinder uses a vinyl chloride pipe for water supply (VP pipe) as the cylinder tube 2, a TS cap of the same diameter for the head cover 1, and a rod cover 3 with an oil seal 7 attached by opening a hole in the center of the TS cap of the same diameter as the main outer cylinder member. Note that the connection is fixed with an adhesive for vinyl chloride pipes or the like. Furthermore, a piston 4 with one hole and two grooves formed in a vinyl chloride cap of a smaller diameter than the use tube, and a piston rod 6 using both screw bolts for connection are connected to the opening, and an O-ring 5 is incorporated into the formed groove portion and incorporated into the interior of the above-mentioned main outer cylinder members 1, 2, and 3.

Examples

[0010] An embodiment will be described with reference to the accompanying drawings below. By supplying and discharging pressure water equivalent to the water supply pressure to the head side water supply / drain port 8 provided on the head cover 1 of the cylinder and the rod side water supply / drain port 9 provided on the rod cover, a differential pressure is generated on the rod side and head side pressure receiving surfaces of the piston 4, and a thrust is generated on the connected piston rod.

Industrial Applicability

[0011] It can be used as an actuator for care support equipment and a main power component of a heavy-duty collaborative robot.

Explanation of Reference Numerals

[0012] 1 Head cover 2 Cylinder tube 3 Rod cover 4 Piston 5 O-ring 6 Piston rod 7 Oil seal 8 Head side water supply / drain port 9 Rod side water supply / drain port

Claims

【Claim 1】 By adopting a commercially available PVC pipe for the main member of the outer cylinder of the cylinder, the manufacturing cost can be reduced, the environmental impact can be reduced, and the degree of damage caused by accidental collisions with the human body can be reduced.

Images