Novel electric cylinder sealing structure

Abstract

The utility model provides a novel electric cylinder sealing structure which comprises a cylinder cover and a piston rod, and the cylinder cover is matched with the piston rod. An X-shaped dustproof ring, an oil filling hole and a guide ring are arranged on the cylinder cover, the X-shaped dustproof ring, the oil filling hole and the guide ring are arranged on one side close to the piston rod, the oil filling hole is arranged close to the X-shaped dustproof ring, and the guide ring is arranged close to the oil filling hole; the sealing structure between the cylinder cover and the piston rod is specially designed, so that the lubrication of a sealing element can be effectively kept, the sliding friction force is reduced, the wear resistance of the sealing element is improved, and the service life of an electric cylinder sealing system is prolonged.

Description

Technical Field

[0001] The utility model relates to the field of sealing structures, and particularly to a novel sealing structure for an electric cylinder. Background Art

[0002] An electric cylinder is a device that converts electrical energy into mechanical energy, having extremely high positioning accuracy and controllability, and has a wide range of application fields. The electric cylinder is particularly suitable for scenarios that require frequent reciprocating motion, such as industrial robots, automated production lines, and logistics conveying equipment. Compared with traditional hydraulic cylinders, the electric cylinder uses a precision ball or roller screw to replace the hydraulic system, and is driven by an external motor and gearbox. They are lightweight and are directly connected to the motor that drives the actuator. The electromechanical system no longer requires heavy pumps, accumulators, oil tanks, and pipelines, nor the use of hydraulic oil, and has the advantages of being safer and more environmentally friendly, and can eliminate the risks of fire, pollution, or personal injury related to leakage and spillage.

[0003] During actual use, some electric cylinders show phenomena such as wear on the sealing surface, friction scratches on the piston rod, etc. not long after working, and as the use time prolongs, the piston rod is strained and pollutants enter the interior of the electric cylinder, exacerbating the failure and resulting in shutdown for maintenance. After inspection, it is found that the reason is that the sealing parts lack lubrication, the sliding friction force is large, and the dust-proof ring and guide ring wear too fast and become ineffective. Content of the Utility Model

[0004] The purpose of the utility model is to solve the above problems, and provide a novel sealing structure for an electric cylinder. By specially designing the sealing structure between the cylinder head and the piston rod, it can effectively maintain the lubrication of the sealing parts, reduce the sliding friction force, improve the wear resistance of the sealing parts, and enhance the working life of the electric cylinder sealing system.

[0005] To achieve the above purpose, the utility model adopts the following technical solutions.

[0006] A novel sealing structure for an electric cylinder includes a cylinder head and a piston rod, and the cylinder head cooperates with the piston rod; an X-shaped dust-proof ring, an oil injection hole, and a guide ring are arranged on the cylinder head, the X-shaped dust-proof ring, the oil injection hole, and the guide ring are arranged on the side close to the piston rod, the oil injection hole is arranged close to the X-shaped dust-proof ring, and the guide ring is arranged close to the oil injection hole.

[0007] Further, the guide ring is arranged away from the X-shaped dust-proof ring.

[0008] Further, the X-shaped dust-proof ring is of a thin lip structure.

[0009] Further, the X-shaped dust-proof ring is made of a polyurethane part.

[0010] Further, the guide ring is in a square ring shape.

[0011] Furthermore, the guide ring is made of glass fiber modified reinforced nylon parts.

[0012] Furthermore, the oil injection hole is a stepped hole.

[0013] The positive effects of a new type of electric cylinder sealing structure of the present utility model are as follows:

[0014] The X-shaped dust-proof ring in the new type of electric cylinder sealing structure adopts a specially designed cross-sectional structure. The outer lip can prevent pollutants from entering, the inner lip seals the lubricating grease and prevents leakage. The thin lip design has low friction and also has a long service life under poor lubrication conditions; the oil injection hole is arranged between the X-shaped dust-proof ring and the guide ring, which can more conveniently inject lubricating grease, reduce the sliding friction force of the sealing parts, and extend the sealing life; the guide ring is made of glass fiber modified reinforced nylon material, has high dynamic compression strength, good temperature resistance and wear resistance characteristics, and strong guiding and supporting properties. Description of the Drawings

[0015] Figure 1 It is a schematic diagram provided by an embodiment of the present utility model.

[0016] The reference numerals in the figure are respectively:

[0017] 1. Cylinder head; 2. X-shaped dust-proof ring; 3. Oil injection hole; 4. Guide ring; 5. Piston rod. Specific Embodiments

[0018] The following gives the specific embodiments of a new type of electric cylinder sealing structure of the present utility model in conjunction with the accompanying drawings. However, it should be noted that the specific embodiments are not used to limit the specific implementation of the present utility model. All similar structures and similar changes using the present utility model should be included in the protection scope of the present utility model. The description of the following embodiments refers to the attached drawings to illustrate specific embodiments in which the present utility model can be implemented. The directional terms mentioned in the embodiments, such as "up", "down", "front", "back", "left", "right", "top", "bottom", etc., are only references to the directions of the attached drawings. Therefore, the directional terms used are for explaining and understanding the present utility model, rather than for limiting the present utility model.

[0019] See Figure 1 ... A new type of electric cylinder sealing structure includes a cylinder head 1 and a piston rod 5, and the cylinder head 1 cooperates with the piston rod 5; an X-shaped dust-proof ring 2, an oil injection hole 3 and a guide ring 4 are arranged on the cylinder head 1, and the X-shaped dust-proof ring 2, the oil injection hole 3 and the guide ring 4 are arranged on one side close to the piston rod 5. The oil injection hole 3 is arranged close to the X-shaped dust-proof ring 2, and the guide ring 4 is arranged close to the oil injection hole 3. The guide ring 4 is arranged away from the X-shaped dust-proof ring 2.

[0020] The X-shaped dust seal ring 2 has a thin lip structure. The X-shaped dust seal ring 2 is made of wear-resistant, durable and highly elastic polyurethane material. With a thin lip design, it has low friction and a long working life. A dust seal groove is provided on the cylinder head 1 for placing the X-shaped dust seal ring 2, and the dimensions of the dust seal groove match those of the X-shaped dust seal ring 2.

[0021] A guide ring groove is provided on the cylinder head 1 for placing the guide ring 4, and the dimensions of the guide ring groove match those of the guide ring 4. The guide ring 4 is square-shaped. The guide ring 4 is made of glass fiber modified reinforced nylon material, has high dynamic compression strength, good temperature resistance and wear resistance characteristics, and provides strong guiding and supporting for the piston rod 5.

[0022] The oil injection hole 3 is a stepped hole; in one embodiment, the oil injection hole 3 is a columnar stepped hole, with a columnar smooth hole on the side close to the piston rod 5 and a columnar threaded hole on the side far from the piston rod 5, and a thread can be screwed in to seal the oil injection hole 3. In another embodiment, the side of the oil injection hole 3 close to the piston rod 5 is a columnar smooth hole, and the side far from the piston rod 5 is a conical smooth hole. The oil injection hole 3 is sealed by an interference-fit sealing pin, and the end of the sealing pin is provided with a thread, and the sealing pin can be pulled out by a pin extractor.

[0023] When assembling the new electric cylinder sealing structure, the X-shaped dust seal ring 2 is installed in the dust seal groove, the guide ring 4 is installed in the guide ring groove, and then the cylinder head 1 is installed on the piston rod 5. The guide ring 4 is between the cylinder head 1 and the piston rod 5, preventing direct contact and friction between the cylinder head 1 and the piston rod 5, and playing a supporting and guiding role for the electric cylinder when the piston rod 5 reciprocates. Grease is regularly added to the oil injection hole 3 to lubricate the X-shaped dust seal ring 2 and the guide ring 4, which can reduce the sliding friction and wear amount, and effectively improve the working life of the sealing system. The injected grease is sealed by the right lip of the X-shaped dust seal ring 2, and external pollutants are blocked by the left lip of the X-shaped dust seal ring 2 and cannot enter the interior of the electric cylinder.

Claims

1. A novel electric cylinder sealing structure, characterized in that, It includes a cylinder head and a piston rod, and the cylinder head is fitted with the piston rod; an X-shaped dust seal, an oil injection hole and a guide ring are provided on the cylinder head, and the X-shaped dust seal, the oil injection hole and the guide ring are arranged on the side close to the piston rod. The oil injection hole is arranged close to the X-shaped dust seal, the guide ring is arranged close to the oil injection hole, and the guide ring is arranged away from the X-shaped dust seal. The X-shaped dust seal has a thin lip structure and is made of a polyurethane part. The guide ring is square annular and is made of a glass fiber modified reinforced nylon part; A dust seal groove is provided on the cylinder head, and the size of the dust seal groove matches that of the X-shaped dust seal; The oil injection hole is a columnar stepped hole, with a columnar smooth hole on the side close to the piston rod and a columnar threaded hole on the side away from the piston rod.

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