A servo electric cylinder with an anti-rotation device

Abstract

The present invention belongs to the technical field of electric cylinders, and in particular to a servo electric cylinder with an anti-rotation device, comprising a base plate, a first end cap being fixed to one side of the base plate, a cylinder body being fixed to the other end of the first end cap, a second end cap being detachably connected to the other end of the cylinder body, a screw and a collar being threaded together being provided in the cylinder body, the screw being connected to the first end cap via a bearing, the collar being connected to the cylinder body via an anti-collision device, a sleeve passing through the second end cap being fixed to the end of the collar away from the first end cap, a connector being fixed to the other end of the collar, a rotation drive assembly being provided on the base plate, and a cooling assembly being provided on the cylinder body. In the present invention, the screw is driven to rotate by the rotation drive assembly, and the screw drives the collar, sleeve, and connector to telescopically move along the cylinder body, the anti-collision device can prevent the collar and the screw from rotating together, and the cooling assembly can provide temperature reduction protection for the cylinder body and the collar to avoid excessive temperature due to friction between the cylinder body and the collar.

Description

Technical Field

[0001] The present invention relates to the technical field of electric cylinders, and in particular to a servo electric cylinder with an anti-rotation device. Background Art

[0002] The electric cylinder is a modular product that integrates a servo motor and a lead screw. It converts the servo motor's rotational motion into linear motion. At the same time, it transforms the servo motor's best advantages - precise speed control, precise rotational speed control, and precise torque control - into precise speed control, precise position control, and precise thrust control, realizing a new revolutionary product series of high-precision linear motion.

[0003] The conversion of the servo motor's rotary motion into linear motion is mainly achieved through the screw-slider structure. When the electric cylinder is working, there is constant friction between the screw and the slider, as well as between the slider and the cylinder body, which will cause the components in the cylinder body to overheat and affect their service life. Therefore, corresponding improvements are made to address this problem. Summary of the Invention

[0004] Based on the technical problems existing in the prior art, the present invention proposes a servo electric cylinder with an anti-rotation device.

[0005] The present invention proposes a servo electric cylinder with an anti-rotation device, including a base plate, a first end cover is fixed to one side of the base plate, the other end of the first end cover is fixed to a cylinder body, the other end of the cylinder body is detachably connected to the second end cover, a screw and a collar threaded together are provided in the cylinder body, the screw is connected to the first end cover through a bearing, the collar is connected to the cylinder body through the anti-rotation device, a sleeve passing through the second end cover is fixed to the end of the collar away from the first end cover, and a connecting head is fixed to the other end of the sleeve, a driving assembly is provided on the base plate, and a cooling assembly is provided on the cylinder body, the screw is driven to rotate by the driving assembly, and the screw drives the collar, sleeve and connecting head to move telescopically along the cylinder body, the anti-rotation device can prevent the collar and the screw from rotating together, and the cooling assembly can provide temperature reduction protection for the cylinder body and the collar to avoid excessive temperature due to friction between the cylinder body and the collar.

[0006] Preferably, the anti-rotation device includes a sliding bar provided on the inner circumferential wall of the cylinder body, and the outer circumferential wall of the ring is provided with a sliding mouth that slides with the sliding bar. Through the cooperation between the sliding mouth and the sliding bar, the ring will not rotate with the screw, so that the ring can move back and forth along the cylinder body.

[0007] Preferably, the driving assembly includes a cover fixed to an end of the base plate away from the cylinder body, a first synchronous wheel, a second synchronous wheel and a synchronous belt are arranged in the cover, a motor is fixed on the same side of the base plate and the cylinder body, the first synchronous wheel is mounted on the output shaft of the motor, the second synchronous wheel is mounted on the screw, and the synchronous belt connects the first synchronous wheel and the second synchronous wheel together. When the motor is started, the motor output shaft drives the first synchronous wheel to rotate, and then the first synchronous wheel drives the second synchronous wheel to rotate through the synchronous belt, and the second synchronous wheel will synchronously drive the screw to rotate.

[0008] Preferably, a plurality of connecting columns surrounding the cylinder body are fixed on the side of the first end cover close to the cylinder body, and a countersunk hole for the connecting columns to pass through is provided on the second end cover, and a nut threadedly connected to the end of the connecting column is provided in the countersunk hole. The second end cover is detachably fixed to the end of the cylinder body, so that the various components of the electric cylinder can be conveniently assembled.

[0009] Preferably, the cooling assembly includes an open circular tube that is fixed to the side of the cylinder body, a circular hole for one end of the circular tube to pass through is provided on the collar, a first outlet and a second outlet are respectively provided at both ends of the circular tube, an annular groove is provided on the collar, a sponge ring is installed in the annular groove, a feeding pipe is provided on the circular tube, and a pipe cover is provided at the feeding pipe, and grease is injected into the circular tube through the feeding pipe, so that the heat on the cylinder body and the collar can be absorbed by the circular tube to cool them, and as the temperature of the circular tube increases, the grease will gradually melt to form lubricating liquid, and the lubricating liquid will flow to the screw through the second outlet, so as to lubricate the screw and the collar, and when the collar passes through the first outlet, the lubricating liquid at the first outlet will adhere to the outer wall of the collar, so that the collar and the cylinder body can be lubricated, and the lubricating liquid can flow along the annular groove and be adsorbed on the sponge ring, so as to achieve the effect of fully coating the collar, thereby fully lubricating the collar and the cylinder body.

[0010] Preferably, the cooling assembly includes a return pipe that passes through and is fixed on the side of the cylinder body, a liquid cooling tank is fixedly sleeved on the return pipe, and a liquid inlet pipe is provided on the side of the liquid cooling tank. When the sleeve moves back and forth, the gas in the cylinder body will flow through the return pipe, and then the gas will be cooled at the liquid cooling tank, thereby achieving a cooling effect on the electric cylinder.

[0011] Preferably, the cooling assembly includes a pair of single-way pipe and double-way pipe that pass through and are fixed on the side of the cylinder body, an oil storage tank is connected between the single-way pipe and the double-way pipe, the liquid level of the lubricating oil in the oil storage tank is located between the two pipes of the double-way pipe, and a one-way valve is installed in both pipes of the double-way pipe. When the collar moves to the right, the gas in the cylinder body flows into the oil storage tank through the pipe below the double-way pipe, and the gas forms bubbles in the lubricating oil, the gas is cooled, and when the bubbles burst, the surrounding oil droplets are entrained and carried out, and then enter the cylinder body through the single-way pipe, thereby lubricating the parts in the cylinder body. When the collar moves to the left, the gas in the cylinder body enters the oil storage tank through the single-way pipe, and then flows into the cylinder body through the pipe above the double-way pipe.

[0012] Preferably, the cooling assembly includes a pair of connecting pipes that pass through and are fixed on the side of the cylinder body, a box body is connected between the two connecting pipes, an air inlet is provided on the top of the box body, and a mesh plate is fixed in the air inlet. When the ring moves back and forth, the gas in the cylinder body will flow into the box body through the connecting pipe, and then the external gas will flow into the cylinder body through the box body, thereby discharging the hot gas in the cylinder body to achieve a cooling effect. The mesh plate can prevent dust from entering the cylinder body.

[0013] Preferably, two rows of baffles are provided in the box body, and the two rows of baffles are staggered and fixed on the top inner wall and the bottom inner wall of the box body respectively. The baffles can extend the flow path of the exhausted gas, thereby preventing this part of the gas from being sucked into the cylinder body before the temperature is lowered.

[0014] Compared with the prior art, the present invention provides a servo electric cylinder with an anti-rotation device, which has the following beneficial effects:

[0015] 1. A servo electric cylinder with an anti-rotation device can provide cooling protection for the cylinder body and the collar by setting a cooling component to avoid excessive temperature caused by friction between the cylinder body and the collar.

[0016] 2. A servo electric cylinder with an anti-rotation device can absorb the heat on the cylinder body and the collar through the arrangement of a circular tube to cool them down, and as the temperature of the circular tube increases, the grease will gradually melt to form a lubricating liquid, and the lubricating liquid will flow to the screw through the second outlet, so as to lubricate the screw and the collar, and when the collar passes through the first outlet, the lubricating liquid at the first outlet will adhere to the outer wall of the collar, so as to lubricate the collar and the cylinder body, and the lubricating liquid can flow along the ring groove and be adsorbed on the sponge ring, so as to achieve the effect of fully coating the collar, thereby fully lubricating the collar and the cylinder body.

[0017] 3. A servo electric cylinder with an anti-rotation device is equipped with a liquid cooling tank. When the collar moves back and forth, the gas in the cylinder will flow through the return pipe, and then the gas will be cooled in the liquid cooling tank, thereby achieving a cooling effect on the electric cylinder.

[0018] 4. A servo electric cylinder with an anti-rotation device is provided with an oil storage tank. When the collar moves to the right, the gas in the cylinder body flows into the oil storage tank through the pipe below the double-way pipe. The gas forms bubbles in the lubricating oil, the gas is cooled, and when the bubbles burst, the surrounding oil droplets are entrained and carried out, and then enter the cylinder body through the single-way pipe, thereby lubricating the parts in the cylinder body. When the collar moves to the left, the gas in the cylinder body enters the oil storage tank through the single-way pipe, and then flows into the cylinder body through the pipe above the double-way pipe.

[0019] 5. A servo electric cylinder with an anti-rotation device is provided with a box. When the ring moves back and forth, the gas in the cylinder will flow into the box through the connecting pipe, and then the external gas will flow into the cylinder through the box, thereby discharging the hot gas in the cylinder to achieve a cooling effect. The mesh plate can prevent dust from entering the cylinder.

[0020] 6. A servo electric cylinder with an anti-rotation device is provided with two rows of baffles, which can extend the flow path of the exhausted gas, thereby preventing the gas from being sucked into the cylinder body before its temperature is lowered. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the overall structure of a servo electric cylinder with an anti-rotation device proposed by the present invention;

[0022] Figure 2 A schematic diagram of the internal structure of a housing of a servo electric cylinder with an anti-rotation device proposed by the present invention;

[0023] Figure 3 This is a schematic diagram of the installation structure of a cooling assembly of a servo electric cylinder with an anti-rotation device proposed in Example 1 of the present invention;

[0024] Figure 4 A schematic diagram of the installation structure between the cylinder body and the second end cover of a servo electric cylinder with an anti-rotation device proposed by the present invention;

[0025] Figure 5 This is a schematic structural diagram of a cooling assembly of a servo electric cylinder with an anti-rotation device proposed in Example 1 of the present invention;

[0026] Figure 6 This is a schematic diagram of the installation structure of a cooling assembly of a servo electric cylinder with an anti-rotation device proposed in Example 2 of the present invention;

[0027] Figure 7 This is a schematic diagram of the installation structure of a cooling assembly of a servo electric cylinder with an anti-rotation device proposed in Example 3 of the present invention;

[0028] Figure 8 For the present invention Figure 7 A schematic diagram of the enlarged structure at point A;

[0029] Figure 9 This is a schematic diagram of the installation structure of a cooling assembly of a servo electric cylinder with an anti-rotation device proposed in Example 4 of the present invention;

[0030] Figure 10 For the present invention Figure 9 Schematic diagram of the enlarged structure at point B.

[0031] In the figure: 1. base plate; 2. first end cover; 3. cylinder body; 4. second end cover; 5. bearing; 6. screw; 7. collar; 8. sleeve; 9. connector; 10. motor; 11. cover; 12. first synchronous wheel; 13. second synchronous wheel; 14. synchronous belt; 15. connecting column; 16. nut; 17. countersunk hole; 18. sliding mouth; 19. sliding strip; 20. circular pipe; 21. first outlet; 22. second outlet; 23. circular hole; 24. feeding pipe; 25. pipe cover; 26. ring groove; 27. sponge ring; 28. liquid cooling tank; 29. ​​liquid inlet pipe; 30. return pipe; 31. single-way pipe; 32. oil storage tank; 33. two-way pipe; 34. one-way valve; 35. connecting pipe; 36. box body; 37. baffle; 38. air inlet; 39. mesh plate. DETAILED DESCRIPTION

[0032] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0033] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as limiting the present invention.

[0034] Reference Figure 1-10When the screw 6 is rotated, the screw 6 drives the sleeve 7, the sleeve 8 and the connector 9 to move along the cylinder 3. The anti-rotation device can prevent the sleeve 7 and the screw 6 from rotating together, and the cooling component can cool the cylinder 3 and the sleeve 7 to avoid excessive temperature due to friction between the cylinder 3 and the sleeve 7.

[0035] Among them, the anti-rotation device includes a slide bar 19 arranged on the inner wall of the cylinder body 3, and the outer wall of the ring 7 is provided with a slide mouth 18 that slides with the slide bar 19. Through the cooperation between the slide mouth 18 and the slide bar 19, the ring 7 will not rotate with the screw 6, so that the ring 7 can move back and forth along the cylinder body 3.

[0036] Among them, the driving assembly includes a cover 11 fixed to the end of the base plate 1 away from the cylinder body 3, and a first synchronous wheel 12, a second synchronous wheel 13 and a synchronous belt 14 are arranged in the cover 11. A motor 10 is fixed on the same side of the base plate 1 and the cylinder body 3. The first synchronous wheel 12 is installed on the output shaft of the motor 10, and the second synchronous wheel 13 is installed on the screw 6. The synchronous belt 14 connects the first synchronous wheel 12 and the second synchronous wheel 13 together. Start the motor 10, and the output shaft of the motor 10 drives the first synchronous wheel 12 to rotate, and then the first synchronous wheel 12 drives the second synchronous wheel 13 to rotate through the synchronous belt 14, and the second synchronous wheel 13 will synchronously drive the screw 6 to rotate.

[0037] Among them, a plurality of connecting columns 15 surrounding the cylinder body 3 are fixed on the side of the first end cover 2 close to the cylinder body 3, and a countersunk hole 17 for the connecting column 15 to pass through is opened on the second end cover 4. A nut 16 threadedly connected to the end of the connecting column 15 is provided in the countersunk hole 17, and the second end cover 4 is detachably fixed to the end of the cylinder body 3, so that the various components of the electric cylinder can be conveniently assembled.

[0038] In Example 1, the cooling assembly includes an open circular tube 20 that passes through and is fixed on the side of the cylinder body 3. A circular hole 23 is provided on the collar 7 for one end of the circular tube 20 to pass through. A first outlet 21 and a second outlet 22 are provided at both ends of the circular tube 20. A ring groove 26 is provided on the collar 7. A sponge ring 27 is installed in the ring groove 26. A feeding pipe 24 is provided on the circular tube 20. A pipe cover 25 is provided at the feeding pipe 24. Grease is injected into the circular tube 20 through the feeding pipe 24. In this way, the heat on the cylinder body 3 and the collar 7 can be absorbed by the circular tube 20 to cool it. The temperature drops, and as the temperature of the loop tube 20 rises, the grease will gradually melt to form a lubricating liquid, and the lubricating liquid will flow to the screw 6 through the second outlet 22, so as to lubricate the screw 6 and the collar 7. When the collar 7 passes through the first outlet 21, the lubricating liquid at the first outlet 21 will adhere to the outer wall of the collar 7, so that the collar 7 and the cylinder body 3 can be lubricated, and the lubricating liquid can flow along the annular groove 26 and be adsorbed on the sponge ring 27, so as to achieve the effect of fully coating the collar 7, thereby fully lubricating the collar 7 and the cylinder body 3.

[0039] In Example 2, the cooling assembly includes a return pipe 30 that passes through and is fixed on the side of the cylinder body 3. A liquid cooling tank 28 is fixedly mounted on the return pipe 30, and a liquid inlet pipe 29 is provided on the side of the liquid cooling tank 28. When the collar 7 moves back and forth, the gas in the cylinder body 3 will flow through the return pipe 30, and then the gas will be cooled at the liquid cooling tank 28, thereby achieving a cooling effect on the electric cylinder.

[0040] In Example 3, the cooling assembly includes a pair of single-way tubes 31 and double-way tubes 33 that pass through and are fixed on the side of the cylinder body 3. An oil storage tank 32 is connected between the single-way tube 31 and the double-way tube 33. The liquid level of the lubricating oil in the oil storage tank 32 is located between the two pipes of the double-way tube 33. A one-way valve 34 is installed in both pipes of the double-way tube 33. When the ring 7 moves to the right, the gas in the cylinder body 3 flows into the oil storage tank 32 through the pipe below the double-way tube 33. The gas forms bubbles in the lubricating oil, the gas is cooled, and when the bubbles burst, the surrounding oil droplets are entrained and carried out, and then enter the cylinder body 3 through the single-way tube 31, thereby lubricating the parts in the cylinder body 3. When the ring 7 moves to the left, the gas in the cylinder body 3 enters the oil storage tank 32 through the single-way tube 31, and then flows into the cylinder body 3 through the pipe above the double-way tube 33.

[0041] In Example 4, the cooling assembly includes a pair of connecting pipes 35 that pass through and are fixed on the side of the cylinder body 3. A box body 36 is connected between the two connecting pipes 35. An air inlet 38 is provided on the top of the box body 36. A mesh plate 39 is fixed inside the air inlet 38. When the ring 7 moves back and forth, the gas in the cylinder body 3 will flow into the box body 36 through the connecting pipes 35, and then the external gas will flow into the cylinder body 3 through the box body 36, thereby discharging the hot gas in the cylinder body 3 to achieve a cooling effect. The mesh plate 39 can prevent dust from entering the cylinder body 3.

[0042] Furthermore, two rows of baffles 37 are provided in the box body 36, and the two rows of baffles 37 are staggered. The two rows of baffles 37 are respectively fixed on the top inner wall and the bottom inner wall of the box body 36. The baffles 37 can extend the flow path of the exhausted gas, thereby preventing the gas from being sucked into the cylinder body 3 before its temperature is lowered.

[0043] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A servo electric cylinder with an anti-rotation device, comprising a base plate (1), characterized in that: A first end cap (2) is fixed to one side of the base plate (1), a cylinder body (3) is fixed to the other end of the first end cap (2), a second end cap (4) is detachably connected to the other end of the cylinder body (3), a screw rod (6) and a collar (7) threadedly connected are provided in the cylinder body (3), the screw rod (6) is connected to the first end cap (2) via a bearing (5), the collar (7) is connected to the cylinder body (3) via an anti-collision device, a sleeve (8) passing through the second end cap (4) is fixed to the end of the collar (7) away from the first end cap (2), a connector (9) is fixed to the other end of the sleeve (8), a driving assembly is provided on the base plate (1), and a cooling assembly is provided on the cylinder body (3); The anti-rotation device is used to prevent the collar (7) and the screw (6) from rotating together; The driving assembly is used to drive the screw (6) to rotate; The cooling assembly is used to provide temperature reduction protection for the cylinder body (3) and the collar (7); The cooling assembly includes an open circular tube (20) that passes through and is fixed on the side of the cylinder body (3). A circular hole (23) is provided on the collar (7) for one end of the circular tube (20) to pass through. A first outlet (21) and a second outlet (22) are respectively provided at both ends of the circular tube (20). An annular groove (26) is provided on the collar (7). A sponge ring (27) is installed in the annular groove (26). A feeding pipe (24) is provided on the circular tube (20). A pipe cover (25) is provided at the feeding pipe (24). Grease is injected into the circular tube (20) through the feeding pipe (24). The circular tube (20) absorbs heat from the cylinder body (3) and the collar (7) to melt the grease to form a lubricating liquid. The lubricating liquid flows to the screw (6) through the second outlet (22) for lubrication and cooling.

2. The servo electric cylinder with an anti-rotation device according to claim 1, characterized in that: The anti-rotation device comprises a slide bar (19) provided on the circumferential inner wall of the cylinder body (3), and a slide opening (18) is provided on the circumferential outer wall of the collar (7) for sliding engagement with the slide bar (19).

3. The servo electric cylinder with an anti-rotation device according to claim 1, characterized in that: The driving assembly comprises a cover (11) fixed to an end of the base plate (1) away from the cylinder body (3), a first synchronous wheel (12), a second synchronous wheel (13) and a synchronous belt (14) are arranged in the cover (11), a motor (10) is fixed on the same side of the base plate (1) and the cylinder body (3), the first synchronous wheel (12) is mounted on the output shaft of the motor (10), the second synchronous wheel (13) is mounted on the screw (6), and the synchronous belt (14) connects the first synchronous wheel (12) and the second synchronous wheel (13) together.

4. The servo electric cylinder with an anti-rotation device according to claim 1, characterized in that: A plurality of connecting columns (15) surrounding the cylinder body (3) are fixed on one side of the first end cover (2) close to the cylinder body (3), and a countersunk hole (17) for the connecting columns (15) to pass through is provided on the second end cover (4), and a nut (16) threadedly connected to the end of the connecting column (15) is provided in the countersunk hole (17).

5. The servo electric cylinder with an anti-rotation device according to claim 1, characterized in that: Or the cooling assembly includes a pair of single-way pipes (31) and double-way pipes (33) that pass through and are fixed on the side of the cylinder body (3), an oil storage tank (32) is connected between the single-way pipe (31) and the double-way pipe (33), the liquid level of the lubricating oil in the oil storage tank (32) is located between the two pipes of the double-way pipe (33), and a one-way valve (34) is installed in both pipes of the double-way pipe (33). When the collar (7) moves to the right, the gas in the cylinder body (3) flows into the oil storage tank (32) through the pipe below the double-way pipe (33), and the gas forms bubbles in the lubricating oil. When the bubbles burst, the surrounding oil droplets are carried out through the single-way pipe (31) and enter the cylinder body (3), thereby lubricating the parts in the cylinder body (3). When the collar (7) moves to the left, the gas in the cylinder body (3) enters the oil storage tank (32) through the single-way pipe (31), and then flows into the cylinder body (3) through the pipe above the double-way pipe (33).

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