Directional oil cylinder

Abstract

The directional oil cylinder comprises a cylinder barrel and a piston rod, a limiting column with a non-circular section is installed in the cylinder barrel along the axis, an inner hole is formed in the piston rod along the axis, and the piston rod is in sliding fit with the limiting column through the inner hole so as to limit rotation of the piston rod. The directional oil cylinder is provided with a non-circular limiting column along the axis, a piston rod is in sliding fit with the limiting column through an inner hole formed along the axis, rotation of the piston rod can be limited, and vertical circulating directional movement of the oil cylinder is achieved; when the piston rod of the oil cylinder is connected with the rotating part to form a working mechanism, vertical working and rotating working can be achieved at the same time, interference on rotation of the rotating part is avoided, and the requirement for rotating stability is more easily met. The overall structure is simple and the manufacturing cost is low.

Description

Technical Field

[0001] The utility model relates to the technical field of oil cylinders, in particular to a directional oil cylinder. Background Art

[0002] An oil cylinder is a hydraulic cylinder. A hydraulic cylinder usually includes a cylinder barrel and a cylinder head, a piston and a piston rod, a sealing device, a buffer device and an exhaust device. The buffer device and the exhaust device depend on the specific application scenario, and other devices are indispensable. The input of the hydraulic cylinder is the flow rate and pressure of the fluid, and the output is the linear motion speed and thrust of the piston rod. The piston of the hydraulic cylinder can complete linear reciprocating motion, and the output linear displacement is limited. When an existing device containing an oil cylinder is working, if the piston rod of the oil cylinder is directly connected to a rotating part, the piston rod will rotate with the rotating part, causing the rotating part to be unable to rotate stably and unable to meet work requirements. Therefore, it is necessary to design an oil cylinder that can move in an up and down cycle. Utility Model Content

[0003] The utility model aims to provide a directional oil cylinder, which solves the problem that the existing oil cylinder will rotate after being connected to a rotating component.

[0004] The utility model achieves the above-mentioned purpose through the following technical solutions:

[0005] A directional oil cylinder comprises a cylinder barrel and a piston rod. A limiting column with a non-circular cross section is installed in the cylinder barrel along the axis. An inner hole is opened inside the piston rod along the axis. The piston rod slides with the limiting column through the inner hole to limit the rotation of the piston rod.

[0006] Furthermore, a limiting sleeve is provided in the inner hole, the inner wall of the limiting sleeve matches the shape of the outer wall of the limiting column, and the inner hole is slidably sleeved on the outer wall of the limiting column through the limiting sleeve.

[0007] Furthermore, the non-circular shape refers to one of a triangle, a square, a regular pentagon, a regular hexagon, a regular octagon, a rhombus, an ellipse or a semicircle.

[0008] Furthermore, an oil inlet and an oil outlet are formed through the wall of the cylinder.

[0009] Furthermore, the lower end of the piston rod is connected to a piston, the piston is intercepted and arranged in a cylinder, and an annular sealing ring is filled between the piston and the cylinder.

[0010] Furthermore, an induction magnetic ring for detecting the position of the piston rod in the oil cylinder is arranged in the cylinder barrel.

[0011] Furthermore, an annular mounting seat is provided at the upper end of the cylinder, and a plurality of mounting holes are formed through the annular mounting seat.

[0012] The beneficial effects of the utility model are as follows: (1) the directional oil cylinder is provided with a non-circular limit column along the axis, and the piston rod can limit the rotation of the piston rod through the inner hole provided along the axis and the limit column, so that the oil cylinder can realize up and down cyclic directional movement. (2) when the oil cylinder piston rod is connected to the rotating part to form a working mechanism, it can realize up and down work and rotation work at the same time, without interfering with the rotation of the rotating part, and it is easier to meet the requirements of rotation stability; the overall structure is simple and the manufacturing cost is low. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the overall cross-sectional structure of the utility model;

[0014] Figure 2 For this utility model Figure 1 Enlarged structural diagram below the AA surface in the middle.

[0015] Figure 3 This is a schematic diagram of the cross-sectional structure of the utility model viewed from below along the AA plane.

[0016] In the figure: 1. Cylinder; 2. Piston rod; 3. Limiting column; 4. Limiting sleeve; 5. Oil inlet; 6. Oil outlet; 7. Piston; 8. Annular sealing ring; 9. Induction magnetic ring; 10. Annular mounting seat; 11. Mounting hole. DETAILED DESCRIPTION

[0017] The present application is further described in detail below in conjunction with the accompanying drawings. It is necessary to point out here that the following specific implementation methods are only used to further illustrate the present application and cannot be understood as limiting the scope of protection of the present application. Technical personnel in this field can make some non-essential improvements and adjustments to the present application based on the above application content.

[0018] like Figure 1-3 As shown, a directional oil cylinder includes a cylinder barrel 1 and a piston rod 2. A limit column 3 with a non-circular cross-section is installed along the axis in the cylinder barrel 1. An inner hole is opened inside the piston rod 2 along the axis. The piston rod 2 slides with the limit column 3 through the inner hole to limit the rotation of the piston rod 2.

[0019] Working principle: Figure 1-3As shown, the non-circular limit column representation diagrams of the utility model are all hexagonal prisms, and the limit column 3 is slidably matched with the piston rod 2. When the output end of the piston rod 2 is connected to the rotating component, the piston rod 2 will not rotate around the non-circular limit column 3. Therefore, when the cylinder piston rod is connected to the rotating component, the cylinder can work up and down while also rotating. The upper end of the cylinder barrel 1 can be sealed by setting a cylinder cover to the cylinder barrel 1, and at the same time play a telescopic guiding role for the piston rod 2. The cylinder cover extends to the inside of the cylinder barrel 1, and an O-ring seal is set between the cylinder barrel 1, and a plurality of rubber sealing rings are also set between the cylinder barrel 1 and the piston rod 2 to increase the sealing performance.

[0020] Preferably, a limit sleeve 4 is provided in the inner hole, and the inner wall of the limit sleeve 4 matches the shape of the outer wall of the limit column 3. The inner hole is arranged on the outer wall of the limit column 3 through the limit sleeve sliding sleeve. The inner wall of the limit sleeve 4 matches the shape of the outer wall of the limit column 3 so that there is good sealing between the two, so that the medium oil can provide sufficient thrust during the sliding process of the piston rod 2 and the oil in the inner hole of the piston rod 2 will not be too much to affect the normal linear motion speed of the piston rod 2.

[0021] Preferably, the non-circular shape refers to one of a triangle, a square, a regular pentagon, a regular hexagon, a regular octagon, a rhombus, an ellipse or a semicircle, and the limit column 3 can be but is not limited to being set to a limit column 3 of the above shape, which can prevent the piston rod 2 mounted on the outer wall from rotating.

[0022] Preferably, an oil inlet 5 and an oil outlet 6 are formed through the wall of the cylinder 1, the oil inlet 5 is connected to the enclosed space formed by the cylinder below the piston, and the oil outlet 6 is connected to the enclosed space formed by the cylinder above the piston.

[0023] Preferably, the lower end of the piston rod 2 is connected to a piston 7, the piston 7 is intercepted and arranged in the cylinder 1, and an annular sealing ring 8 is filled between the piston 7 and the cylinder 1. The piston 7 and the lower end cylinder 1 form an oil inlet space for oil intake, and have good sealing performance. The annular sealing ring 8 can be made of but not limited to high temperature resistant rubber, which can not only further enhance the sealing performance between the piston 7 and the cylinder 1, but also adapt to the situation where the medium oil temperature in the cylinder is higher.

[0024] Preferably, an induction magnetic ring 9 for detecting the position of the piston rod 2 in the cylinder is provided in the cylinder barrel 1. The induction magnetic ring 9 can detect the position of the piston rod 2 in the cylinder through the Hall effect. Conventional settings such as a magnetic switch need to be installed outside the cylinder. Preferably, a limiter that can limit the sliding distance of the piston rod 2 is installed to prevent the piston rod 2 from detaching from the limit column 3.

[0025] Preferably, an annular mounting seat 10 is provided at the upper end of the cylinder barrel 1, and a plurality of mounting holes 11 are formed through the annular mounting seat 10. The oil cylinder can be installed by engaging bolts with the mounting holes 11, thereby improving the installation convenience of the device.

[0026] The above-mentioned embodiments only express several implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent of the utility model. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model.

Claims

1. A directional oil cylinder, comprising a cylinder barrel (1) and a piston rod (2), characterized in that: A limiting column (3) with a non-circular cross section is installed along the axis in the cylinder (1), and an inner hole is opened along the axis inside the piston rod (2). The piston rod (2) slides with the limiting column (3) through the inner hole to limit the rotation of the piston rod (2).

2. A directional oil cylinder according to claim 1, characterized in that: A limiting sleeve (4) is arranged in the inner hole, the inner wall of the limiting sleeve (4) matches the shape of the outer wall of the limiting column (3), and the inner hole is slidably mounted on the outer wall of the limiting column (3) through the limiting sleeve.

3. A directional oil cylinder according to claim 1, characterized in that: The non-circular shape refers to one of a triangle, a square, a regular pentagon, a regular hexagon, a regular octagon, a rhombus, an ellipse or a semicircle.

4. A directional oil cylinder according to claim 1, characterized in that: An oil inlet (5) and an oil outlet (6) are formed through the wall of the cylinder (1).

5. A directional oil cylinder according to claim 1, characterized in that: The lower end of the piston rod (2) is connected to a piston (7), the piston (7) is intercepted and arranged in the cylinder barrel (1), and an annular sealing ring (8) is filled between the piston (7) and the cylinder barrel (1).

6. A directional oil cylinder according to claim 1, characterized in that: An induction magnetic ring (9) for detecting the position of the piston rod (2) in the oil cylinder is arranged in the cylinder barrel (1).

7. A directional oil cylinder according to claim 1, characterized in that: An annular mounting seat (10) is provided at the upper end of the cylinder (1), and a plurality of mounting holes (11) are formed through the annular mounting seat (10).

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