Self-lubricating bending machine piston cylinder

Abstract

The utility model discloses a self-lubricating bending machine piston cylinder which comprises a piston cylinder body, and a bearing seat is arranged on the top of the piston cylinder body. The ball screw is arranged in the piston cylinder body through a bearing and can move up and down in the piston cylinder body, and a piston is arranged at the bottom of the ball screw; the lubricating assembly is arranged on the side wall of the piston cylinder body, extends into the cylinder body and is used for lubricating the bearing and the ball screw; the anti-rotation flat key is installed in the middle of the piston and embedded into an anti-rotation groove in the inner wall of the piston cylinder body. The piston is sleeved with a movable ring, the movable ring can move in a limited mode when the piston stretches out and retracts back, and when the piston stretches out, the movable ring moves upwards to block the oil passing groove, so that certain pressure is formed in a lower cavity of the piston, lubricating oil is pushed to an oil inlet from an oil outlet, and therefore a bearing on the top can be lubricated. When the piston retracts, the movable ring moves downwards, the oil passing groove is opened, the lubricating oil can freely enter the piston upper cavity from the piston lower cavity, and backflow of the lubricating oil in the oil supply pipe is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of bending machines, in particular to a self-lubricating piston cylinder of a bending machine. Background Art

[0002] The bending machine is a sheet metal forming equipment. The original structure usually uses a hydraulic cylinder to drive the mold to press down and squeeze the sheet into shape. The hydraulic cylinder has the following disadvantages: it cannot accurately position at high speed, requires complex external oil circuit support, is costly and has the risk of oil seepage, leakage, and pipe burst, and the hydraulic cylinder has a slow response speed.

[0003] To this end, the utility model provides a self-lubricating bending machine piston cylinder to solve the above technical problems. Utility Model Content

[0004] Purpose of the utility model: To solve the problems in the prior art that hydraulic cylinders cannot be accurately positioned at high speed, require complex external oil circuit support, are costly and have the risk of oil seepage, leakage, and pipe burst, and that the hydraulic cylinders have slow response speeds.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A self-lubricating bending machine piston cylinder, comprising:

[0007] A piston cylinder body, wherein a bearing seat is arranged on the top of the piston cylinder body;

[0008] A ball screw, wherein the ball screw is arranged inside a piston cylinder through a bearing, a piston is arranged at the bottom of the ball screw, and the piston is driven to move up and down through a ball screw nut on the ball screw;

[0009] A lubrication assembly, which is arranged on the side wall of the piston cylinder and extends into the interior of the cylinder, and is used for lubricating the bearing and the ball screw;

[0010] The anti-rotation flat key is installed in the middle of the piston and embedded in the anti-rotation groove on the inner wall of the piston cylinder.

[0011] Furthermore, the lubrication assembly comprises:

[0012] The oil supply pipe is installed at the upper and lower ends of the piston cylinder body, the upper end of the oil supply pipe is an oil inlet, and the lower end is an oil outlet. The upper and lower ends of the piston cylinder body are provided with the oil inlet and the oil outlet;

[0013] A movable ring, which is sleeved on the outside of the piston and can move up and down with the piston;

[0014] A sealing ring, the sealing ring is clamped and arranged in the groove of the movable ring;

[0015] A limit retaining spring, which is arranged on the side wall of the piston and has a distance from the piston protrusion slightly greater than the height of the movable ring, so that the movable ring can be limited between the piston protrusion and the limit retaining spring;

[0016] An oil groove is arranged between the movable ring and the piston.

[0017] Furthermore, a ball screw nut is provided on the ball screw, and a screw locking nut is provided between the ball screw and the bearing installation position.

[0018] Furthermore, a transmission synchronous pulley is arranged on the top of the ball screw to provide drive for the ball screw.

[0019] Compared with the prior art, the beneficial effects of the utility model are:

[0020] 1. The outer dimensions of the piston cylinder are similar to those of the hydraulic cylinder, and can be replaced without changing the structure of the machine tool.

[0021] 2. The upper part is the bearing seat, and the lower part is the upper and lower structures of the piston cylinder. The screw is stable and can better withstand axial and radial forces.

[0022] 3. There is a lubrication structure inside the piston cylinder, which can provide lubrication and heat dissipation for the screw and bearings.

[0023] 4. A movable ring is mounted on the piston, which can move to a limited extent when the piston is extended and retracted. When the piston is extended, the movable ring moves upward to block the oil groove, so that a certain pressure is formed in the lower cavity of the piston, pushing the lubricating oil from the oil outlet to the oil inlet, thereby lubricating the bearing on the top; when the piston is retracted, the movable ring moves downward to open the oil groove, so that the lubricating oil can freely enter the upper cavity of the piston from the lower cavity of the piston, avoiding the backflow of the lubricating oil in the oil supply pipe.

[0024] 5. There is an anti-rotation flat key in the middle of the piston, which is embedded in the piston anti-rotation groove of the piston cylinder body to prevent the piston from rotating during up and down movement. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a structural schematic diagram of the utility model.

[0026] In the figure: 1. bearing seat; 2. anti-rotation flat key; 3. anti-rotation groove; 4. piston cylinder; 5. piston; 6. transmission synchronous pulley; 7. screw locking nut; 8. oil inlet; 9. ball screw; 10. ball screw nut; 11. oil supply pipe; 12. movable ring; 13. sealing ring; 14. limit retaining spring; 15. oil groove; 16. oil outlet. DETAILED DESCRIPTION

[0027] In the following description, a large number of specific details are given to provide a more thorough understanding of the utility model. However, it is obvious to those skilled in the art that the utility model can be implemented without one or more of these details. In other examples, in order to avoid confusion with the utility model, some technical features known in the art are not described.

[0028] The applicant believes that the hydraulic cylinder in the prior art cannot be accurately positioned at high speed, requires complex external oil circuit support, is costly and has the risk of oil seepage, leakage, and pipe burst, and the hydraulic cylinder has a slow response speed.

[0029] To this end, the applicant designed Figure 1 A self-lubricating bending machine piston cylinder shown in the figure includes: a piston cylinder body 4, a bearing seat 1 is arranged on the top of the piston cylinder body 4; a ball screw 9, the ball screw 9 is arranged inside the piston cylinder body 4 through a bearing, a piston 5 is arranged at the bottom of the ball screw 9, the piston 5 is driven up and down by the ball screw nut 7 on the ball screw 9, and a piston 5 is arranged at the bottom of the ball screw 9; a lubrication component, the lubrication component is arranged on the side wall of the piston cylinder body 4 and extends to the inside of the cylinder body, and is used to lubricate the bearing and the ball screw 9; an anti-rotation flat key 2, the anti-rotation flat key 2 is installed in the middle of the piston 5 and embedded in the anti-rotation groove 3 on the inner wall of the piston cylinder body 4.

[0030] The self-lubricating bending machine piston cylinder of this embodiment is further optional, and the lubrication assembly includes: an oil supply pipe 11, the oil supply pipe 11 is correspondingly installed at the upper and lower ends of the piston cylinder body 4, the upper end of the oil supply pipe 11 is an oil inlet 8, and the lower end is an oil outlet 16, and the upper and lower ends of the piston cylinder body 4 are correspondingly provided with the oil inlet 8 and the oil outlet 16; a movable ring 12, the movable ring 12 is sleeved on the outside of the piston 5, and can move up and down with the piston 5; a sealing ring 13, the sealing ring 13 is clamped and arranged in the groove of the movable ring 12; a limiting retaining spring 14, the limiting retaining spring 14 is arranged on the side wall of the piston 5, and the distance between the limiting retaining spring 14 and the protrusion of the piston 5 is slightly greater than the height of the movable ring 12, so that the movable ring 12 can be limited between the protrusion of the piston 5 and the limiting retaining spring 14; an oil groove 15 is arranged between the movable ring 12 and the piston 5.

[0031] The self-lubricating bending machine piston cylinder of this embodiment can further optionally be provided with a screw locking nut 7 between the ball screw 9 and the bearing mounting position.

[0032] The self-lubricating bending machine piston cylinder of this embodiment can further optionally be provided with a transmission synchronous pulley 6 on the top of the ball screw 9 for providing drive for the ball screw 9.

[0033] Working principle: The piston 5 is covered with a movable ring 12, which can move to a limited extent when the piston 5 is extended and retracted. During operation, when the piston 5 is extended, the movable ring 12 moves upward to block the oil groove 15, so that a certain pressure is formed in the lower cavity of the piston 5, and the lubricating oil is pushed from the oil outlet 16 to the oil inlet 8, so as to lubricate the bearing on the top; when the piston 5 is retracted, the movable ring 12 moves downward to open the oil groove 15, and the lubricating oil can freely enter the upper cavity of the piston 5 from the lower cavity of the piston 5, avoiding the backflow of the lubricating oil in the oil supply pipe 11.

[0034] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

Claims

1. A self-lubricating bending machine piston cylinder, characterized in that: include: A piston cylinder body, wherein a bearing seat is arranged on the top of the piston cylinder body; A ball screw, wherein the ball screw is arranged inside a piston cylinder through a bearing, a piston is arranged at the bottom of the ball screw, and the piston is driven to move up and down through a ball screw nut on the ball screw; A lubrication assembly, which is arranged on the side wall of the piston cylinder and extends into the interior of the cylinder, and is used for lubricating the bearing and the ball screw; The anti-rotation flat key is installed in the middle of the piston and embedded in the anti-rotation groove on the inner wall of the piston cylinder.

2. The self-lubricating bending machine piston cylinder according to claim 1, characterized in that: The lubrication assembly comprises: The oil supply pipe is installed at the upper and lower ends of the piston cylinder body, the upper end of the oil supply pipe is an oil inlet, and the lower end is an oil outlet. The upper and lower ends of the piston cylinder body are provided with the oil inlet and the oil outlet; A movable ring, which is sleeved on the outside of the piston and can move up and down with the piston; A sealing ring, the sealing ring is clamped and arranged in the groove of the movable ring; A limit retaining spring, which is arranged on the side wall of the piston and has a distance from the piston protrusion slightly greater than the height of the movable ring, so that the movable ring can be limited between the piston protrusion and the limit retaining spring; An oil groove is arranged between the movable ring and the piston.

3. The self-lubricating bending machine piston cylinder according to claim 1, characterized in that: A screw locking nut is also arranged between the ball screw and the bearing installation position.

4. The self-lubricating bending machine piston cylinder according to claim 1, characterized in that: A transmission synchronous pulley is arranged on the top of the ball screw to provide drive for the ball screw.

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