High-stability locking oil cylinder

Abstract

The utility model discloses a high-stability locking oil cylinder which comprises a cylinder body, a cylinder base arranged on the lower portion of the cylinder body and a piston installed in the cylinder body in a sliding mode. The ejection mechanism is characterized in that the piston comprises a supporting guide part and an ejection part; the length of the supporting guide part is greater than two thirds of the length of the inner cavity of the cylinder body; and the cylinder body is also provided with an inner clamp spring for limiting the piston. The length of the supporting guide part of the piston is set to be larger than two thirds of the length of the inner cavity of the cylinder body, so that the length of the supporting guide part is increased, and the stability of the piston in use is improved; the ejection distance of the piston is limited through the inner clamping spring, and the piston is prevented from directly sliding out of the cylinder body.

Description

Technical Field

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

[0002] Cylinders all use hydraulic fluid to push pistons to move. However, in existing technologies, the length of the piston inside the cylinder is still shorter than half the length of the cylinder wall. When the piston is pushed outward, only a small part of the structure is left in contact with the cylinder wall. When the piston rod shakes during use, it is easy to cause the piston rod to bend, reducing the stability and strength of the piston. Therefore, a high-stability locking cylinder with increased piston length is proposed to improve stability. Summary of the Invention

[0003] The purpose of the utility model is to solve the above problems and to provide a high-stability locking oil cylinder.

[0004] In order to achieve the above-mentioned purpose, the utility model provides the following technical solution: a high-stability locking cylinder, comprising a cylinder body, a cylinder seat arranged at the lower part of the cylinder body, and a piston slidably installed in the cylinder body; the piston is characterized in that the piston includes a support guide portion and an ejection portion; the length of the support guide portion is greater than two-thirds of the length of the cylinder inner cavity; and an internal retaining spring for limiting the piston is also installed on the cylinder body.

[0005] Preferably, a limiting boss in contact with the inner retaining spring is provided on the supporting guide portion of the piston.

[0006] Preferably, a buffer pad is installed on the bottom of the long support guide part and the limiting boss to provide a buffering effect.

[0007] Preferably, an open retaining ring, a Y-shaped hole, and several sealing rings and wear-resistant rings are installed between the support guide part of the piston and the inner wall of the cylinder body.

[0008] Preferably, a retaining ring groove for installing an internal retaining ring is further provided in the cylinder body.

[0009] Preferably, a filling cavity is provided between the cylinder base and the piston; and an oil inlet and outlet channel communicating with the filling cavity is provided on the cylinder base.

[0010] Preferably, plugs are installed on the oil inlet and outlet channels.

[0011] The beneficial effects of the present invention are as follows: by setting the length of the support guide portion of the piston to be greater than two-thirds of the length of the inner cavity of the cylinder, the length of the support guide portion is increased, thereby increasing the stability of the piston during use;

[0012] The piston is prevented from sliding out of the cylinder body by limiting the ejection distance of the piston using an internal retaining spring. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural diagram of the present utility model.

[0014] Figure 2 It is a cross-sectional view of the present utility model.

[0015] Figure 3 This utility model Figure 2 A partial enlarged view of point A in the middle.

[0016] Figure 4 It is a structural diagram of the piston of the utility model.

[0017] Legend: 1. Cylinder body; 101. Cylinder seat; 102. Retaining ring groove; 103. Filling chamber; 104. Oil inlet and outlet channels; 105. Plug; 2. Piston; 201. Support guide; 202. Ejector; 203. Limiting boss; 3. Internal retaining ring; 4. Buffer pad; 5. Opening retaining ring; 6. Y-ring for hole; 7. Sealing ring; 8. Wear-resistant ring. DETAILED DESCRIPTION

[0018] Below we further explain the high stability locking cylinder described in the utility model with reference to the accompanying drawings.

[0019] It should be noted that all directional indications in the embodiments of the present invention, such as up, down, left, right, front, back, etc., are only used to explain the relative position relationship, movement status, etc. between the various components in a certain specific posture as shown in the accompanying drawings. If the specific posture changes, the directional indication will also change accordingly.

[0020] See attached Figure 1-4 As shown, in this embodiment, a high-stability locking cylinder comprises a cylinder body 1, a cylinder seat 101 arranged at the lower part of the cylinder body 1, and a piston 2 slidably installed in the cylinder body 1; its characteristic is that the piston 2 comprises a support guide portion 201 and an ejection portion 202; the length of the support guide portion 201 is greater than two-thirds of the length of the inner cavity of the cylinder body 1; the cylinder body 1 is also provided with an internal retaining spring 3 for limiting the piston 2; the cylinder body 1 is also provided with a retaining spring groove 102 for installing the internal retaining spring 3; by setting the length of the support guide portion of the piston 2 to be greater than two-thirds of the length of the inner cavity of the cylinder body 1, the length of the support guide portion is increased, thereby increasing the stability of the piston 2 during use; by utilizing the internal retaining spring 3 to limit the ejection distance of the piston 2, the piston 2 is prevented from directly sliding out of the cylinder body 1.

[0021] See attached Figure 2As shown, a limiting boss 203 in contact with the inner retaining spring 3 is provided on the support guide part 201 of the piston 2; a buffer pad 4 for buffering is installed on the bottom of the support guide part 201 and the limiting boss 203; by utilizing the limiting boss 203 on the support guide part 201 to contact the inner retaining spring 3, the inner retaining spring 3 limits the limiting boss 203, thereby facilitating the limiting of the ejection distance of the piston 2 and preventing the piston 2 from directly sliding out of the cylinder body 1; by utilizing the buffer pad 4 to buffer between the limiting boss 203 and the inner retaining spring 3 and between the piston 2 and the cylinder seat 101, the stability of the piston 2 in use is further improved.

[0022] See attached Figure 2-3 As shown, an opening retaining ring 5 , a hole Y-ring 6 , and several sealing rings 7 and wear-resistant rings 8 are installed between the support guide portion 201 of the piston 2 and the inner wall of the cylinder body 1 .

[0023] See attached Figure 2 As shown, a filling chamber 103 is provided between the cylinder base 101 and the piston 2; an oil inlet and outlet channel 104 communicating with the filling chamber 103 is provided on the cylinder base 101; a plug 105 is installed on the oil inlet and outlet channel 104; the oil inlet and outlet channel 104 is connected to the filling chamber 103, which facilitates the inflow and outflow of hydraulic oil through the oil inlet and outlet channel 104, thereby facilitating the control of the movement of the piston 2.

[0024] During the use of the present invention, the hydraulic oil enters the filling chamber 103 through the oil inlet and outlet channels 104. The pressure in the filling chamber 103 increases, pushing the piston upward until the buffer pad 4 on the limiting boss 203 of the support guide part 201 contacts the internal retaining spring 3. The internal retaining spring 3 limits the limiting boss 203, thereby facilitating the limiting of the ejection distance of the piston 2. When the hydraulic oil is discharged from the oil inlet and outlet channels 104, the pressure in the filling chamber 103 decreases as the hydraulic oil decreases, and the piston 2 descends and resets.

[0025] The above embodiments are intended to illustrate the present invention, not to limit the present invention. Any solution that is a simple transformation of the present invention falls within the scope of protection of the present invention.

Claims

1. A high-stability locking oil cylinder, comprising a cylinder body (1), a cylinder seat (101) arranged at the lower part of the cylinder body (1), and a piston (2) slidably mounted in the cylinder body (1); wherein: The piston (2) comprises a support guide portion (201) and an ejection portion (202); the length of the support guide portion (201) is greater than two-thirds of the length of the inner cavity of the cylinder body (1); and an internal retaining spring (3) for limiting the position of the piston (2) is also installed on the cylinder body (1).

2. A high-stability locking cylinder according to claim 1, characterized in that: A limiting boss (203) in contact with the inner retaining spring (3) is provided on the supporting guide portion (201) of the piston (2).

3. The high-stability locking cylinder according to claim 2, characterized in that: A buffer pad (4) is installed on the bottom of the support guide portion (201) and the limiting boss (203) for buffering.

4. The high-stability locking cylinder according to claim 2, characterized in that: An opening retaining ring (5), a hole Y-shaped ring (6), and a plurality of sealing rings (7) and wear-resistant rings (8) are installed between the support guide portion (201) of the piston (2) and the inner wall of the cylinder body (1).

5. The high-stability locking cylinder according to claim 1, characterized in that: A retaining ring groove (102) for mounting an internal retaining ring (3) is also provided in the cylinder body (1).

6. The high-stability locking cylinder according to claim 1, characterized in that: A filling cavity (103) is provided between the cylinder base (101) and the piston (2); and an oil inlet and outlet channel (104) communicating with the filling cavity (103) is provided on the cylinder base (101).

7. The high-stability locking cylinder according to claim 6, characterized in that: A plug (105) is installed on the oil inlet and outlet passage (104).

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