Anti-deflection hydraulic oil cylinder

Abstract

The utility model discloses an anti-deflection hydraulic oil cylinder which comprises an oil cylinder body, an oil cylinder piston is installed in an oil cavity of the oil cylinder body in a sliding mode, a piston rod is installed at the upper end of the oil cylinder piston, the upper end of the piston rod penetrates through the oil cylinder body, and the lower end of the piston rod penetrates through the oil cylinder piston and is provided with a hydraulic pull rod in an extending mode. The hydraulic pull rod is further sleeved with an oil cylinder cover, and the oil cylinder cover is screwed on the oil cylinder body in a threaded mode. According to the hydraulic oil cylinder, the possibility that the piston rod is damaged due to deflection can be effectively reduced, the service life of the hydraulic oil cylinder is prolonged, and the use requirements can be better met.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic cylinder equipment technology, specifically to an anti-deflection hydraulic cylinder. Background Technology

[0002] A hydraulic cylinder is a hydraulic actuator that converts hydraulic energy into mechanical energy and performs linear reciprocating motion (or oscillating motion). Normally, hydraulic cylinders are subjected to axial loads during use. However, in certain special applications, they may also be subjected to radial loads, which can cause the piston rod to deflect and become damaged during operation.

[0003] For example, sliding shafts usually require hydraulic cylinders to move them. When the piston rod of the hydraulic cylinder is connected to the sliding shaft, the rotation of the sliding shaft may cause the piston rod of the hydraulic cylinder to rotate, increasing the possibility of piston rod deflection damage. Therefore, there is an urgent need for a hydraulic cylinder that can prevent deflection. Utility Model Content

[0004] The purpose of this invention is to provide an anti-deflection hydraulic cylinder to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] An anti-deflection hydraulic cylinder includes: a cylinder body; a cylinder piston slidably mounted in the oil chamber of the cylinder body; a piston rod mounted on the upper end of the cylinder piston; the upper end of the piston rod passing through the cylinder body; the lower end of the piston rod passing through the cylinder piston and extending to a hydraulic tie rod; a cylinder cover is also fitted onto the hydraulic tie rod; the cylinder cover is threaded onto the cylinder body; the cross-section of the oil chamber is oblong; and the cylinder piston is adapted to the oil chamber.

[0007] As a preferred embodiment, a sealing ring is provided between the piston rod and the cylinder body, a sealing ring is provided between the hydraulic tie rod and the cylinder cover, and a sealing ring is also provided between the cylinder cover and the cylinder body.

[0008] As a preferred embodiment, a spline is provided between the piston rod and the cylinder piston, and a fixing nut is threaded onto the hydraulic tie rod, with the fixing nut located at the lower end of the cylinder piston.

[0009] As a preferred embodiment, the upper end of the piston rod is fixed with a sliding shaft via a connecting mechanism.

[0010] As a preferred embodiment, the connecting mechanism includes a connecting groove at the lower end of the sliding shaft, a connecting end cap fitted on the piston rod, a stepped portion at the upper end of the piston rod, a connecting bearing fitted on the stepped portion, a connecting nut threaded onto the upper end of the piston rod, the connecting bearing being inserted into the connecting groove, and the connecting end cap being threaded onto the lower end of the connecting groove.

[0011] As a preferred embodiment, the connecting bearing is an angular contact ball bearing.

[0012] Compared with existing technologies, the beneficial effects of this invention are: by setting an oblong oil chamber in conjunction with an oblong cylinder piston, rotation of the piston rod can be effectively prevented, thereby reducing the possibility of piston rod deflection and extending the service life of the hydraulic cylinder, thus better meeting usage requirements. This invention can effectively reduce the possibility of piston rod damage caused by deflection, improve the service life of the hydraulic cylinder, and better meet usage requirements. Attached Figure Description

[0013] Figure 1 This is a cross-sectional structural diagram of an anti-deflection hydraulic cylinder;

[0014] Figure 2 For a type of anti-deflection hydraulic cylinder Figure 1 Schematic diagram of the cross-sectional structure at position AA;

[0015] Figure 3 For a type of anti-deflection hydraulic cylinder Figure 1 Enlarged structural diagram at point B.

[0016] In the diagram: 1. Cylinder body; 11. Piston rod; 12. Oil chamber; 13. Sealing ring; 14. Cylinder piston; 15. Spline; 16. Fixing nut; 17. Cylinder cover; 18. Hydraulic tie rod; 2. Sliding shaft; 3. Connecting mechanism; 31. Connecting groove; 32. Connecting end cover; 33. Connecting bearing; 34. Connecting nut. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] Example: Please refer to Figures 1-3An anti-deflection hydraulic cylinder includes: a cylinder body 1; a cylinder piston 14 is slidably installed in an oil chamber 12 of the cylinder body 1; a piston rod 11 is installed on the upper end of the cylinder piston 14; the upper end of the piston rod 11 passes through the cylinder body 1; the lower end of the piston rod 11 passes through the cylinder piston 14 and extends to a hydraulic tie rod 18; a cylinder cover 17 is also fitted on the hydraulic tie rod 18; the cylinder cover 17 is threaded onto the cylinder body 1; the cross-section of the oil chamber 12 is oblong; and the cylinder piston 14 is adapted to the oil chamber 12.

[0019] The working principle of this utility model is as follows: by setting an oblong oil chamber 12 in conjunction with an oblong oil cylinder piston 14, the piston rod 11 can be effectively prevented from rotating, thereby reducing the possibility of piston rod 11 deflection and extending the service life of the hydraulic cylinder, thus better meeting the usage requirements.

[0020] As a further solution, a sealing ring 13 is provided between the piston rod 11 and the cylinder body 1, a sealing ring 13 is provided between the hydraulic tie rod 18 and the cylinder cover 17, and a sealing ring 13 is also provided between the cylinder cover 17 and the cylinder body 1. By providing multiple sets of sealing rings 13, the sealing effect of the hydraulic cylinder can be improved.

[0021] As a further embodiment, a spline 15 is provided between the piston rod 11 and the hydraulic cylinder piston 14, and a fixing nut 16 is threaded onto the hydraulic tie rod 18, with the fixing nut 16 located at the lower end of the hydraulic cylinder piston 14. By providing the spline 15, rotation of the piston rod 11 relative to the hydraulic cylinder piston 14 can be effectively prevented, and the fixing nut 16, in conjunction with the spline 15, allows the piston rod 11 to be better fixed on the hydraulic cylinder piston 14.

[0022] As a further embodiment, the upper end of the piston rod 11 is fixed with a sliding shaft 2 via a connecting mechanism 3. The connecting mechanism 3 includes a connecting groove 31 at the lower end of the sliding shaft 2. A connecting end cap 32 is fitted onto the piston rod 11. A stepped portion is provided at the upper end of the piston rod 11, and a connecting bearing 33 is fitted onto the stepped portion. A connecting nut 34 is also threaded onto the upper end of the piston rod 11. The connecting bearing 33 is inserted into the connecting groove 31, and the connecting end cap 32 is threaded onto the lower end of the connecting groove 31. In this embodiment, the connecting bearing 33 is an angular contact ball bearing.

[0023] The working principle of the connecting mechanism 3 is as follows: During connection, firstly, the connecting end cap 32 is fitted onto the piston rod 11, then the connecting bearing 33 is installed on the stepped part of the piston rod 11, then the connecting nut 34 is screwed onto the end of the piston rod 11 to fix the connecting bearing 33, then the connecting bearing 33 is inserted into the connecting groove 31 at the lower end of the sliding shaft 2, and finally, the connecting end cap 32 is screwed onto the lower end of the connecting groove 31 to complete the connection.

[0024] In this utility model, terms such as "upper", "lower", "left", "right", "front", "back", "vertical", "horizontal", "side", and "bottom" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only used to facilitate the description of the structural relationship between the various components or elements of this utility model and do not specifically refer to any component or element in this utility model. They should not be construed as limiting this utility model.

Claims

1. An anti-deflection hydraulic cylinder, characterized in that, include: A cylinder body (1) is provided. A cylinder piston (14) is slidably installed in the oil chamber (12) of the cylinder body (1). A piston rod (11) is installed on the upper end of the cylinder piston (14). The upper end of the piston rod (11) passes through the cylinder body (1). The lower end of the piston rod (11) passes through the cylinder piston (14) and extends to a hydraulic tie rod (18). A cylinder cover (17) is also fitted on the hydraulic tie rod (18). The cylinder cover (17) is threaded onto the cylinder body (1). The cross-section of the oil chamber (12) is waist-shaped, and the oil cylinder piston (14) is adapted to the oil chamber (12).

2. The anti-deflection hydraulic cylinder according to claim 1, characterized in that: A sealing ring (13) is provided between the piston rod (11) and the cylinder body (1), a sealing ring (13) is provided between the hydraulic tie rod (18) and the cylinder cover (17), and a sealing ring (13) is also provided between the cylinder cover (17) and the cylinder body (1).

3. The anti-deflection hydraulic cylinder according to claim 2, characterized in that: A spline (15) is provided between the piston rod (11) and the cylinder piston (14), and a fixing nut (16) is threaded onto the hydraulic tie rod (18), the fixing nut (16) being located at the lower end of the cylinder piston (14).

4. The anti-deflection hydraulic cylinder according to claim 3, characterized in that: The upper end of the piston rod (11) is fixed with a sliding shaft (2) via a connecting mechanism (3).

5. The anti-deflection hydraulic cylinder according to claim 4, characterized in that: The connecting mechanism (3) includes a connecting groove (31) at the lower end of the sliding shaft (2), a connecting end cap (32) is fitted on the piston rod (11), a stepped part is provided at the upper end of the piston rod (11), a connecting bearing (33) is fitted on the stepped part, a connecting nut (34) is threaded on the upper end of the piston rod (11), the connecting bearing (33) is inserted into the connecting groove (31), and the connecting end cap (32) is threaded on the lower end of the connecting groove (31).

6. The anti-deflection hydraulic cylinder according to claim 5, characterized in that: The connecting bearing (33) is an angular contact ball bearing.

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