Precise ball screw with dustproof function

Abstract

The utility model relates to the field of ball screws, in particular to a precision ball screw with a dustproof function, which comprises a movable base, a servo motor is fixed at the end of the movable base, an output shaft of the servo motor penetrates through the end of the movable base, a rotating shaft is fixed on the output shaft of the servo motor, and a screw rod is fixed at the end of the rotating shaft. A ball threaded sleeve is arranged on the surface of the lead screw, a dustproof assembly used for wiping dust on the surface of the lead screw is detachably installed at the end of the ball threaded sleeve, and a telescopic sleeve assembly used for overall dust prevention of the lead screw is further detachably installed at the end of the ball threaded sleeve. The dustproof ball screw has the advantages that dust on the surface of the screw can be effectively wiped in the linear reciprocating motion process of the ball threaded sleeve on the surface of the screw, so that the dustproof function is achieved, the space around the screw can be well sealed, the dustproof function is achieved again, the dustproof effect is greatly improved, and precise operation of the ball screw is facilitated.

Description

Technical Field

[0001] The utility model relates to the field of ball screws, in particular to a precision ball screw with a dustproof function. Background Art

[0002] A ball screw is a screw transmission device that uses balls as the transmission medium. It consists of components such as a screw, balls, a guide body, a housing, and an end support. The ball screw has the characteristics of high transmission efficiency, high speed, high precision, and large load capacity. It is widely used in machine tools, aerospace, electronic equipment, and other fields.

[0003] After searching, a precision ball screw with dustproof function with announcement number CN219673209U is found, which includes a screw body, a bushing, a travel sleeve, a ball groove, a screw groove, a brush strip and a sealing strip. The surface of the screw body is sleeved with a travel sleeve, the surface of the screw body is provided with spirally distributed screw grooves, the inner wall of the travel sleeve is provided with spirally distributed ball grooves, a connected circulation groove is provided between the two ends of the ball groove, the inner walls of the two ends of the travel sleeve are provided with embedded grooves, the inner walls of the embedded grooves are installed with bushings, and the inner wall of the bushing is embedded with a brush strip and a sealing strip.

[0004] Although the above utility model patent can provide bushings with brush strips and sealing strips on the inner walls of both ends of the travel sleeve to maintain the sealing state of the inner wall of the travel sleeve, and at the same time, the dust on the surface of the screw body can be cleaned during the movement of the travel sleeve, effectively improving the dust-proof effect inside the travel sleeve, but it cannot effectively prevent dust from the entire screw body. It only relies on the brush strip to brush the screw body, and the dust-proof effect needs to be further improved.

[0005] Therefore, it is necessary to invent a precision ball screw with dustproof function. Utility Model Content

[0006] To this end, the utility model provides a precision ball screw with a dustproof function to solve the problems raised in the above background technology.

[0007] In order to achieve the above-mentioned purpose, the utility model provides the following technical solutions: a precision ball screw with dust-proof function, comprising a movable base, a servo motor is fixed at the end of the movable base, the output shaft of the servo motor passes through the end of the movable base, and a rotating shaft is fixed to the output shaft of the servo motor, a screw is fixed at the end of the rotating shaft, a ball thread sleeve is arranged on the surface of the screw, a dust-proof component for wiping dust on the surface of the screw can be detachably installed on the end of the ball thread sleeve, and a telescopic sleeve component for dust-proofing the screw as a whole can also be detachably installed on the end of the ball thread sleeve, a connecting rod is fixed on one side of the inner wall of the movable base away from the servo motor, and one end of the screw away from the rotating shaft is rotatably connected to the end of the connecting rod, and the connecting rod, the screw and the rotating shaft are all located on the inner side of the telescopic sleeve assembly.

[0008] Preferably, the dustproof component includes two annular connecting plates, which are symmetrically fixed at both ends of the ball thread sleeve, and one end of the annular connecting plate close to the ball thread sleeve is symmetrically threaded with a first fixing screw.

[0009] Preferably, the dustproof component also includes two inner annular connecting plates, which are respectively located on the inner sides of the two annular connecting plates, the outer ring surfaces of the inner annular connecting plates are in contact with the inner ring surfaces of the annular connecting plates, and the upper and lower ends of the inner annular connecting plates are symmetrically provided with first thread grooves, and the end of the first fixing screw is threadedly connected in the first thread groove.

[0010] Preferably, a bushing is fixed on the inner ring surface of the inner annular connecting piece, a number of soft bristles are evenly fixed on the inner surface of the bushing, and the ends of the soft bristles are flexibly in contact with the surface of the screw rod.

[0011] Preferably, the telescopic sleeve assembly includes two laterally arranged connecting sleeves, the two ends of the connecting sleeves are symmetrically fixed on the two side ends of the inner wall of the movable base, the inner surfaces of the connecting sleeves are laterally slidingly connected to the outer telescopic sleeves, the inner surfaces of the outer telescopic sleeves are laterally slidingly connected to the inner telescopic sleeves, and the connecting rod, the screw rod and the rotating shaft are all located on the inner sides of the connecting sleeves, the outer telescopic sleeves and the inner telescopic sleeves.

[0012] Preferably, the two inner telescopic sleeves are provided with second thread grooves symmetrically at one end close to the annular connecting piece, and the annular connecting piece is symmetrically threadedly connected with a second fixing screw at one end away from the ball thread sleeve, and the end of the second fixing screw is threadedly connected in the second thread groove.

[0013] Preferably, a strip hole is horizontally opened on the top of the movable base, a limiting plate is vertically fixed on the top of the ball threaded sleeve, the top of the limiting plate vertically passes through the strip hole, and the surface of the limiting plate is in contact with the wall of the strip hole, and a movable plate is fixed on the top of the limiting plate.

[0014] The beneficial effects of the utility model are as follows: through the coordinated use of the mobile base, servo motor, rotating shaft, screw rod, ball thread sleeve, dustproof component, telescopic sleeve component and connecting rod, under the action of the dustproof component, the ball thread sleeve can effectively wipe the dust on the surface of the screw rod during the linear reciprocating movement of the screw rod surface, thereby realizing the dustproof function; under the action of the telescopic sleeve component, the space around the screw rod can also be well closed, thereby realizing the dustproof function again, greatly improving the dustproof effect, and being beneficial to the precise operation of the ball screw. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 A structural cross-sectional view provided by the utility model;

[0016] Figure 2 for Figure 1 A magnified view of the structure at A;

[0017] Figure 3 A schematic diagram of the structure of the dustproof assembly provided by the utility model in the side view direction;

[0018] Figure 4 A partial structural sectional view provided by the utility model;

[0019] Figure 5 The effect diagram of the use provided by the utility model;

[0020] Figure 6 This is a diagram showing the use effect of the utility model.

[0021] In the figure: 1. movable base; 2. servo motor; 3. rotating shaft; 4. screw rod; 5. ball threaded sleeve; 6. strip hole; 7. limit plate; 8. movable plate; 9. connecting rod; 10. annular connecting plate; 11. first fixing screw; 12. inner annular connecting plate; 13. first thread groove; 14. bushing; 15. soft bristles; 16. connecting sleeve; 17. outer telescopic sleeve; 18. inner telescopic sleeve; 19. second thread groove; 20. second fixing screw. DETAILED DESCRIPTION

[0022] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0023] Please refer to the attached Figure 1-6The utility model provides a precision ball screw with dustproof function, including a moving base 1, a servo motor 2 is fixed at the end of the moving base 1, the output shaft of the servo motor 2 passes through the end of the moving base 1, and the output shaft of the servo motor 2 is fixed with a rotating shaft 3, and a screw 4 is fixed at the end of the rotating shaft 3. When the servo motor 2 is running, the screw 4 can be driven to rotate forward and reversely through the rotating shaft 3, and a ball thread sleeve 5 is arranged on the surface of the screw 4. It should be noted that a plurality of balls (not shown in the figure) are built into the ball thread sleeve 5, and the plurality of balls roll in the spiral ball groove (not shown in the figure) on the surface of the screw 4, which is a well-known technology for those skilled in the art, so it will not be described in detail. A strip hole 6 is horizontally opened on the top of the moving base 1, and a limiting plate 7 is vertically fixed on the top of the ball thread sleeve 5. The top of the limiting plate 7 vertically passes through the strip shaped hole 6, and the surface of the limiting piece 7 is in contact with the hole wall of the strip-shaped hole 6, and a movable plate 8 is fixed on the top of the limiting piece 7, that is, under the common limiting action of the limiting piece 7 and the strip-shaped hole 6, when the screw rod 4 rotates forward and reversely, the ball threaded sleeve 5 threadedly connected to the surface of the screw rod 4 can be converted from rotational motion to linear reciprocating motion, and the end of the ball threaded sleeve 5 is detachably installed with a dustproof component for wiping dust on the surface of the screw rod 4, and the end of the ball threaded sleeve 5 is also detachably installed with a telescopic sleeve component for dustproofing the screw rod 4 as a whole, and a connecting rod 9 is fixed to one side end of the inner wall of the mobile base 1 away from the servo motor 2, and the end of the screw rod 4 away from the rotating shaft 3 is rotatably connected to the end of the connecting rod 9, and the screw rod 4 is preferentially rotatably connected to the end of the connecting rod 9 through a bearing, and the connecting rod 9, the screw rod 4 and the rotating shaft 3 are all located on the inner side of the telescopic sleeve component;

[0024] The dustproof assembly includes two annular connecting pieces 10, which are symmetrically fixed at both ends of the ball thread sleeve 5. One end of the annular connecting piece 10 close to the ball thread sleeve 5 is symmetrically threaded with a first fixing screw 11, that is, the annular connecting piece 10 can move linearly and reciprocatingly synchronously with the ball thread sleeve 5.

[0025] The dustproof component also includes two inner annular connecting pieces 12, which are respectively located on the inner sides of the two annular connecting pieces 10, and the outer ring surface of the inner annular connecting piece 12 fits with the inner ring surface of the annular connecting piece 10. The upper and lower ends of the inner annular connecting piece 12 are symmetrically provided with first thread grooves 13, and the end of the first fixing screw 11 is threadedly connected in the first thread groove 13, that is, under the action of the first fixing screw 11, the inner annular connecting piece 12 can be fixed in the annular connecting piece 10, so those skilled in the art only need to remove the first fixing screw 11 to control the disassembly and assembly of the inner annular connecting piece 12, and the inner ring surface of the inner annular connecting piece 12 is fixed with a bushing 14, and the bushing 14 is preferably set to a rubber material with a certain deformation ability, and a plurality of soft bristles 15 are evenly fixed on the inner surface of the bushing 14, and the soft bristles 15 are preferably set to a nylon material, which is wear-resistant and has good softness, thereby preventing the surface of the screw rod 4 from being scratched. The ends of the soft bristles 15 are flexibly in contact with the surface of the screw rod 4. Specifically, when the annular connecting piece 10 moves back and forth synchronously with the ball threaded sleeve 5, the bushing 14 can be driven to move synchronously by the inner annular connecting piece 12, so that the soft bristles 15 can brush the surface of the screw rod 4, that is, the ball threaded sleeve 5 can effectively wipe the dust on the surface of the screw rod 4 during the linear reciprocating movement of the surface of the screw rod 4, thereby realizing the dust prevention function, and when the technicians in this field remove the first fixing screw 11, the inner annular connecting piece 12 can be removed from the annular connecting piece 10, so that the bushing 14 and the soft bristles 15 can be removed. Although the bushing 14 and the soft bristles 15 are still sleeved on the surface of the screw rod 4 at this time, the technicians in this field can clean the soft bristles 15 by flushing. After cleaning, the inner annular connecting piece 12 can be re-inserted into the annular connecting piece 10 and then fixed, that is, it is convenient to clean the soft bristles 15 regularly;

[0026] The telescopic sleeve assembly includes two laterally arranged connecting sleeves 16, the ends of the two connecting sleeves 16 are symmetrically fixed on the two side ends of the inner wall of the mobile base 1, the inner surfaces of the connecting sleeves 16 are laterally slidably connected with the outer telescopic sleeves 17, and the inner surfaces of the outer telescopic sleeves 17 are laterally slidably connected with the inner telescopic sleeves 18, that is, the inner telescopic sleeve 18 can be telescoped relative to the outer telescopic sleeve 17, and the outer telescopic sleeve 17 can be telescoped relative to the connecting sleeve 16. The connecting rod 9, the screw rod 4 and the rotating shaft 3 are all located inside the connecting sleeve 16, the outer telescopic sleeve 17 and the inner telescopic sleeve 18, which can well seal the space around the screw rod 4, thereby realizing the dustproof function again. The dustproof effect is greatly improved, which is beneficial to the precise operation of the ball screw. The two inner telescopic sleeves 18 are symmetrically provided with second thread grooves 19 at one end close to the annular connecting piece 10, and the end of the annular connecting piece 10 away from the ball thread sleeve 5 is symmetrically threaded with a second fixing screw 20. The end of the second fixing screw 20 is threaded in the second thread groove 19, that is, under the action of the second fixing screw 20, the annular connecting piece 10 can be fixedly connected with the end of the inner telescopic sleeve 18. Therefore, when the annular connecting piece 10 moves back and forth in a straight line, the outer telescopic sleeve 17 and the inner telescopic sleeve 18 can be driven to perform corresponding telescopic (such as Figure 5 and Figure 6 As shown), the connecting sleeve 16, the outer telescopic sleeve 17 and the inner telescopic sleeve 18 have a dustproof function and will not affect the normal movement of the ball threaded sleeve 5.

[0027] It should be noted that in the present invention, the movable base 1 is not an integrally formed structure, but an assembled structure, and its side ends and bottom can be fixed and installed by bolts or the like to facilitate disassembly, thereby facilitating maintenance and cleaning of the internal screw rod 4 and other structures.

[0028] The above is only a preferred embodiment of the utility model. Any person skilled in the art can modify the utility model by using the above technical solution or modify it into an equivalent technical solution. Therefore, any simple modification or equivalent replacement based on the technical solution of the utility model shall fall within the scope of protection claimed by the utility model.

Claims

1. A precision ball screw with dustproof function, comprising a movable base (1), a servo motor (2) being fixed at the end of the movable base (1), an output shaft of the servo motor (2) passing through the end of the movable base (1), a rotating shaft (3) being fixed to the output shaft of the servo motor (2), a screw rod (4) being fixed at the end of the rotating shaft (3), a ball thread sleeve (5) being arranged on the surface of the screw rod (4), characterized in that: The end of the ball screw sleeve (5) is detachably mounted with a dustproof component for wiping dust off the surface of the screw rod (4), and the end of the ball screw sleeve (5) is also detachably mounted with a telescopic sleeve component for preventing dust on the entire screw rod (4). A connecting rod (9) is fixed to the end of the inner wall of the mobile base (1) away from the servo motor (2), and the end of the screw rod (4) away from the rotating shaft (3) is rotatably connected to the end of the connecting rod (9), and the connecting rod (9), the screw rod (4) and the rotating shaft (3) are all located on the inner side of the telescopic sleeve component.

2. The precision ball screw with dustproof function according to claim 1, characterized in that: The dustproof component comprises two annular connecting pieces (10), which are symmetrically fixed at two ends of the ball thread sleeve (5), and one end of the annular connecting piece (10) close to the ball thread sleeve (5) is symmetrically threaded with a first fixing screw (11) in an upper and lower manner.

3. The precision ball screw with dustproof function according to claim 2, characterized in that: The dustproof component also includes two inner annular connecting plates (12), the two inner annular connecting plates (12) are respectively located on the inner sides of the two annular connecting plates (10), the outer ring surface of the inner annular connecting plates (12) is in contact with the inner ring surface of the annular connecting plates (10), the upper and lower ends of the inner annular connecting plates (12) are symmetrically provided with first thread grooves (13), and the end of the first fixing screw (11) is threadedly connected in the first thread groove (13).

4. The precision ball screw with dustproof function according to claim 3, characterized in that: The inner ring surface of the inner annular connecting piece (12) is fixed with a bushing (14), the inner surface of the bushing (14) is evenly fixed with a plurality of soft bristles (15), and the ends of the soft bristles (15) are flexibly in contact with the surface of the screw rod (4).

5. The precision ball screw with dustproof function according to claim 2, characterized in that: The telescopic sleeve assembly comprises two transversely arranged connecting sleeves (16), the ends of the two connecting sleeves (16) are symmetrically fixed on the two side ends of the inner wall of the movable base (1), the inner surfaces of the connecting sleeves (16) are transversely slidably connected to the outer telescopic sleeves (17), the inner surfaces of the outer telescopic sleeves (17) are transversely slidably connected to the inner telescopic sleeves (18), and the connecting rods (9), the screw rods (4) and the rotating shaft (3) are all located on the inner sides of the connecting sleeves (16), the outer telescopic sleeves (17) and the inner telescopic sleeves (18).

6. The precision ball screw with dustproof function according to claim 5, characterized in that: The two inner telescopic sleeves (18) are provided with second thread grooves (19) symmetrically in the upper and lower directions at one end close to the annular connecting piece (10), and the second fixing screws (20) are symmetrically threadedly connected in the upper and lower directions at one end of the annular connecting piece (10) away from the ball thread sleeve (5), and the end of the second fixing screw (20) is threadedly connected in the second thread groove (19).

7. The precision ball screw with dustproof function according to claim 1, characterized in that: A strip hole (6) is horizontally opened on the top of the movable base (1), a limiting plate (7) is vertically fixed on the top of the ball threaded sleeve (5), the top end of the limiting plate (7) vertically passes through the strip hole (6), and the surface of the limiting plate (7) is in contact with the wall of the strip hole (6), and a movable plate (8) is fixed on the top end of the limiting plate (7).

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