Self-locking mechanism of rear cover of hydraulic oil cylinder

Abstract

The utility model discloses a self-locking mechanism of a rear cover of a hydraulic oil cylinder, which belongs to the field of hydraulic oil cylinders and comprises the rear cover of the hydraulic oil cylinder and a cylinder barrel connected with the top surface of the rear cover, a clamping groove for fixing the cylinder barrel is arranged on the top surface of the rear cover, and a sealing washer penetrating through the inner wall of the clamping groove and the inner wall of the cylinder barrel is arranged on the inner wall of the clamping groove. An oil receiving opening is formed in one side of the rear cover. Compared with the prior art, the hydraulic cylinder has the advantages that when hydraulic oil is injected, the hydraulic oil can enter the L-shaped self-locking oil outlet from the central cavity of the rear cover and then enter the space between the stress balance groove and the polytetrafluoroethylene gasket from the L-shaped self-locking oil outlet, and along with continuous injection of the hydraulic oil, the polytetrafluoroethylene gasket can deform and extrude the cylinder barrel at the same time; therefore, the inverted-L-shaped clamping blocks on the outer walls of the clamping grooves are connected with the L-shaped fixing grooves in the outer wall of the cylinder barrel in a clamped mode, and self-locking is completed.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic cylinders, specifically to a self-locking mechanism for the rear cover of a hydraulic cylinder. Background Technology

[0002] Hydraulic cylinders are a common type of lifting machine, often used in lifting components for various trucks and forklifts. Among the various types of hydraulic cylinders, the front lug tie rod hydraulic cylinder is widely used in machine tools and various agricultural equipment due to its advantages such as compact structure, light weight, and easy maintenance.

[0003] The existing front ear ring tie rod hydraulic cylinder structure consists of a telescopic rod, a cylinder barrel, and front and rear covers. The cylinder barrel is sealed by controlling the front and rear covers with a screw. The screw has locking nuts on both sides. To prevent leakage, a sealing gasket is usually installed between the cylinder barrel and the groove of the rear cover. To ensure the sealing effect and integrity of the cylinder barrel, the oil inlet is generally designed on the front and rear covers.

[0004] While the method of connecting the front and rear covers with screws can achieve cylinder sealing, with prolonged use, the sealing effect may become compromised due to the continuous compression of hydraulic oil, potentially leading to gaps between the front and rear covers and the cylinder seal. Therefore, it is necessary to periodically tighten the nuts on both sides of the screws. Utility Model Content

[0005] The technical problem this invention aims to solve is that the self-locking mechanism of the rear cover of existing hydraulic cylinders relies on a screw that passes through the front and rear covers. The cylinder is sealed by adjusting the nuts on both sides of the screw. Once the nuts are removed and loosened, leakage will occur.

[0006] To solve the above technical problems, the technical solution provided by this utility model is: a self-locking mechanism for the rear cover of a hydraulic cylinder, including a rear cover of a hydraulic cylinder and a cylinder barrel connected to the top surface of the rear cover. The top surface of the rear cover is provided with a slot for fixing the cylinder barrel, and a sealing gasket passing through the inner wall of the slot and the inner wall of the cylinder barrel is provided on the inner wall of the slot. An oil inlet is provided on one side of the rear cover.

[0007] The hollow cavity of the rear cover has several L-shaped self-locking oil outlets that pass through the inner wall of the slot, and the bottom surface of the slot has a force balancing groove. Above the force balancing groove, there are several polytetrafluoroethylene gaskets that are locked in the slot. The outer wall end of the slot has several inverted L-shaped locking blocks located above the polytetrafluoroethylene gaskets, and the top surface of the cylinder has an L-shaped fixing groove that rotates and engages with the inverted L-shaped locking blocks.

[0008] As an improvement, the oil inlet of the rear cover is provided with a hydraulic oil conversion port connected by a thread.

[0009] As an improvement, the top surface of the rear cover is provided with several screw through holes through the screw rod.

[0010] As an improvement, the bottom surface of the rear cover is provided with a pin hole for connecting the load device.

[0011] As an improvement, the depth of the force balancing groove is greater than the maximum deformation length of the polytetrafluoroethylene gasket, and the force balancing groove passes through the vertical end opening of the L-shaped self-locking oil outlet.

[0012] As an improvement, the sealing gasket is located above the inverted L-shaped block, and the outer wall of the inverted L-shaped block and the cavity of the L-shaped fixing groove are coated with TPU coating.

[0013] The advantages of this invention compared to the prior art are as follows: When hydraulic oil is injected, it enters the L-shaped self-locking oil outlet from the central cavity of the rear cover, and then enters the force balance groove and the polytetrafluoroethylene gasket from the L-shaped self-locking oil outlet. As the hydraulic oil is continuously injected, the polytetrafluoroethylene gasket will deform and squeeze the cylinder, thereby completing the mutual locking connection between the inverted L-shaped locking block on the outer wall of the slot and the L-shaped fixing groove on the outer wall of the cylinder, thus completing the self-locking. Attached Figure Description

[0014] Figure 1 This is a general structural diagram of a self-locking mechanism for the rear cover of a hydraulic cylinder according to this utility model.

[0015] Figure 2 This is an exploded view of the overall structure of the self-locking mechanism of the rear cover of a hydraulic cylinder according to this utility model.

[0016] Figure 3 This is a cross-sectional view of the overall structure of the self-locking mechanism of the rear cover of a hydraulic cylinder according to this utility model.

[0017] Figure 4 This is a structural diagram of the rear cover of a hydraulic cylinder rear cover according to the present invention.

[0018] As shown in the figure: 1. Rear cover; 11. Slot; 12. Oil inlet; 121. Hydraulic oil conversion port; 13. Screw through hole; 14. Pin hole; 2. Cylinder; 3. Sealing gasket; 4. L-shaped self-locking oil outlet; 41. Force balance groove; 5. PTFE gasket; 6. Inverted L-shaped locking block; 61. L-shaped fixing groove. Detailed Implementation

[0019] The present invention will now be described in further detail with reference to the accompanying drawings.

[0020] As per the instruction manual Figure 1 , 2As shown in Figures 3 and 4, the existing front earring pull rod hydraulic cylinder structure consists of a telescopic rod, a cylinder 2, and a front cover and a rear cover 1 located on both sides of the cylinder 2. The top surface of the rear cover 1 is provided with a slot 11 for fixing the cylinder 2, and the inner wall of the slot 11 is provided with a sealing gasket 3 that passes through the inner wall of the slot 11 and the inner wall of the cylinder 2. The sealing between the cylinder 2 and the slot 11 is achieved through the multiple layers of barrier of the sealing gasket 3.

[0021] To ensure the sealing and uniform force distribution of the cylinder 2, the oil inlet 12 is located on one side of the rear cover 1. In order to facilitate the adaptation of different hydraulic oil interfaces, the oil inlet 12 of the rear cover 1 is provided with a hydraulic oil conversion port 121 connected by a thread.

[0022] To facilitate the screw passing through the front cover and rear cover 1, the top surfaces of the front cover and rear cover 1 are provided with several screw through holes 13 for the screw to pass through.

[0023] To facilitate connection of the control shaft of the load device, the bottom surface of the rear cover 1 is provided with a pin hole 14 for connecting the load device.

[0024] In order to achieve self-locking between the rear cover 1 and the cylinder 2, the hollow cavity of the rear cover 1 is provided with several L-shaped self-locking oil outlets 4 that pass through the inner wall of the slot. The bottom surface of the slot 11 is provided with a force balancing groove 41. In order to ensure the normal use of the force balancing groove 41, the depth of the force balancing groove 41 is greater than the maximum deformation length of the polytetrafluoroethylene gasket 5, and the force balancing groove 41 is open at the vertical end of the L-shaped self-locking oil outlet 4.

[0025] In order to prevent the hydraulic oil above the force balancing groove 41 from gushing out, a number of polytetrafluoroethylene gaskets 5 are provided above the force balancing groove 41 and are stuck in the slots 11. The polytetrafluoroethylene gaskets 5 have excellent sealing performance and can form a better sealing effect when squeezed, which is suitable for oil leakage prevention requirements under various complex conditions.

[0026] To achieve self-locking between the slot 11 and the cylinder 2 under the compression of the PTFE gasket 5, the outer wall of the slot 11 is provided with several inverted L-shaped locking blocks 6 located above the PTFE gasket 5, and the top surface of the cylinder 2 is provided with an L-shaped fixing groove 61 that rotates and engages with the inverted L-shaped locking blocks 6. To ensure the balance of the force points of the cylinder 2, the sealing gasket 3 is located above the inverted L-shaped locking blocks 6, and for anti-slip purposes, the outer wall of the inverted L-shaped locking blocks 6 and the cavity of the L-shaped fixing groove 61 are coated with a TPU coating (TPU coating is a material with high elasticity and wear and oil resistance. TPU has better wear resistance and a hardness of up to 93 degrees, so TPU is a better choice in applications requiring strong support and frequent reciprocating motion. TPU not only has the elasticity of rubber but also has high strength, which makes it perform well in applications such as seals).

[0027] In the specific implementation of this utility model, when hydraulic oil is injected from the oil inlet 12, while the telescopic rod rises, a portion of the hydraulic oil enters the L-shaped self-locking oil outlet 4 and flows into the force balance groove 41. This evenly squeezes the bottom polytetrafluoroethylene gasket 5 to rise and deform, completing the seal. At the same time, it makes the engagement end of the locking inverted L-shaped locking block 6 and the L-shaped fixing groove 61 more closely connected, thus completing the self-locking. This also reduces the impact force of the front cover and the rear cover on the nuts at both ends of the screw, thereby reducing the possibility of the nuts loosening.

[0028] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the inventive spirit of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. A self-locking mechanism for a hydraulic cylinder rear cover, comprising a hydraulic cylinder rear cover (1) and a cylinder barrel (2) connected to the top surface of the rear cover (1), wherein the top surface of the rear cover (1) is provided with a groove (11) for fixing the cylinder barrel (2), and a sealing gasket (3) passing through the inner wall of the groove (11) and the inner wall of the cylinder barrel (2) is provided on the inner wall of the groove (11), and an oil inlet (12) is provided on one side of the rear cover (1), characterized in that: The hollow cavity of the rear cover (1) is provided with several L-shaped self-locking oil outlets (4) that pass through the inner wall of the slot, and the bottom surface of the slot (11) is provided with a force balancing groove (41). Above the force balancing groove (41) are several polytetrafluoroethylene gaskets (5) that are locked in the slot (11). The outer wall end of the slot (11) is provided with several inverted L-shaped locking blocks (6) located above the polytetrafluoroethylene gaskets (5), and the top surface of the cylinder (2) is provided with an L-shaped fixing groove (61) that rotates and engages with the inverted L-shaped locking blocks (6).

2. The self-locking mechanism for the rear cover of a hydraulic cylinder according to claim 1, characterized in that: The rear cover (1) has a hydraulic oil conversion port (121) connected by a thread inside the oil inlet (12).

3. The self-locking mechanism for the rear cover of a hydraulic cylinder according to claim 1, characterized in that: The top surface of the rear cover (1) is provided with several screw through holes (13) through which the screw rod passes.

4. The self-locking mechanism for the rear cover of a hydraulic cylinder according to claim 1, characterized in that: The bottom surface of the rear cover (1) is provided with a pin hole (14) for connecting the load device.

5. The self-locking mechanism for the rear cover of a hydraulic cylinder according to claim 1, characterized in that: The depth of the force balancing groove (41) is greater than the maximum deformation length of the polytetrafluoroethylene gasket (5), and the force balancing groove (41) passes through the vertical end opening of the L-shaped self-locking oil outlet (4).

6. The self-locking mechanism for the rear cover of a hydraulic cylinder according to claim 1, characterized in that: The sealing gasket (3) is located above the inverted L-shaped card block (6), and the outer wall of the inverted L-shaped card block (6) and the cavity of the L-shaped fixing groove (61) are coated with TPU coating.

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