Sealed dustproof lead screw structure

Abstract

The utility model belongs to the technical field of lead screws, and discloses a sealed dustproof lead screw structure which comprises a lead screw, a nut, mounting pipes and a rubber ring, the two ends of the lead screw are fixedly sleeved with mounting plates, a plurality of fixing pipes are arranged on the mounting plates in the circumferential direction at intervals, sliding rods are arranged in the fixing pipes in a sliding mode, and one end of each sliding rod is jointly provided with a mounting ring. A plurality of abutting columns are arranged on one side of the mounting ring in the circumferential direction at intervals, two arc-shaped plates are symmetrically arranged on one side of the mounting ring rod, and a plurality of bristles are arranged on the arc-shaped plates. The lead screw rotates to drive the nut to move and meanwhile drives the mounting plate, the fixing pipe and the mounting ring to rotate. When the nut moves to make the mounting pipe contact with the abutting column, the bristles make contact with the surface of the rubber ring. And the screw rod continuously drives the nut to move to push the mounting ring and the sliding rod to move, and meanwhile, the mounting ring and the bristles rotate relative to the rubber ring, so that dust and chippings on the surface of the rubber ring are swept away, the dust and chippings are prevented from breaking through a seal of the rubber ring and permeating into the nut, and the normal use performance of the nut is guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of lead screw technology, and in particular to a sealed dustproof lead screw structure. Background Technology

[0002] Ball screws are ideal products for converting rotary motion into linear motion, or vice versa. They are the most commonly used transmission components in machine tools and precision machinery. Their main function is to convert rotary motion into linear motion, or torque into reciprocating axial force, while also possessing high precision, reversibility, and high efficiency. During operation, the threads on the ball screw are frequently subjected to friction, leading to wear and significantly affecting the machining quality of the machine tool.

[0003] Lead screws are used in various environments, but are generally used during machining. Machining generates dust and debris, which adhere to the screw's surface. Currently, some lead screw nuts have rubber rings at both ends to prevent dust and debris from entering the nut. However, with prolonged use, as dust and debris accumulate at the rubber rings, some can be forced into the gap between the rubber ring and the lead screw under operating pressure, thus breaching the seal and seeping into the nut. This can cause the lead screw nut to experience resistance during operation, severely affecting its performance. Utility Model Content

[0004] To solve the above problems, this utility model provides a sealed dustproof lead screw structure.

[0005] The above-mentioned technical objective of this utility model is achieved through the following technical solution: a sealed dustproof screw structure, including a screw and a nut sleeved on the screw and threadedly engaged with the screw. Both ends of the nut are provided with mounting tubes arranged concentrically with the screw. A rubber ring is provided inside the mounting tube, and the inner wall of the rubber ring mates with the surface of the screw. Both ends of the screw are fixedly sleeved with an integrally annular mounting plate. Several fixing tubes are circumferentially spaced on the mounting plate. Sliding rods are slidably arranged inside the fixing tubes. A mounting ring is shared at the end of the sliding rods away from the mounting plate. Several abutments are circumferentially spaced on the side of the mounting ring away from the sliding rods. Two arc-shaped plates are symmetrically arranged on the side of the mounting ring away from the sliding rods, and several bristles are provided on the arc-shaped plates.

[0006] By adopting the above technical solution, an installation tube, rubber ring, arc-shaped plate, and brush bristles are installed. The rubber ring prevents dust and debris from the surface of the screw from entering the nut. When it is necessary to clean dust and debris on a certain side of the rubber ring, the screw rotates to drive the nut to move towards the installation plate adjacent to the rubber ring that needs cleaning. Simultaneously, the screw rotation drives the installation plate, fixing tube, and installation ring to rotate. When the nut moves and the installation tube contacts the abutment, the brush bristles contact the surface of the rubber ring. The screw continues to drive the nut to move, pushing the installation ring and sliding rod to move. At the same time, the installation ring and brush bristles rotate relative to the rubber ring, thereby sweeping away dust and debris from the surface of the rubber ring. This prevents dust and debris from breaking through the seal of the rubber ring and seeping into the nut, ensuring the normal performance of the nut.

[0007] Furthermore, a compression spring is fitted onto the fixing tube, with one end of the compression spring connected to the mounting plate and the other end connected to the mounting ring.

[0008] By adopting the above technical solution, a compression spring is sleeved on the fixed tube. When the mounting ring moves, the compression spring is compressed. When the nut moves away from the mounting ring, the compression spring pushes the mounting ring to reset under the action of elasticity.

[0009] Furthermore, a rotating ring is rotatably sleeved on the mounting ring, and a plurality of abutments are circumferentially spaced on the rotating ring, with the orthographic projections of the plurality of abutments all located within the annular region at the end of the mounting tube.

[0010] By adopting the above technical solution, a rotating ring is rotatably sleeved on the mounting ring, so that the abutment can rotate relative to the mounting screw. This ensures that after the abutment contacts the mounting tube, the abutment will not move on the surface of the mounting tube when the mounting ring rotates relative to the rubber ring.

[0011] Furthermore, the mounting ring has two symmetrical arc-shaped grooves on the side away from the sliding rod, and the arc-shaped plate mates with the corresponding arc-shaped grooves.

[0012] By adopting the above technical solution, two arc-shaped grooves are symmetrically opened on the side of the mounting ring away from the sliding rod, which facilitates the replacement of the arc-shaped plate and brush bristles after the bristles become dirty.

[0013] Furthermore, a first magnet is provided at the bottom of the arc-shaped groove, and a second magnet is provided on the side of the arc-shaped plate away from the bristles.

[0014] By adopting the above technical solution, a first magnet and a second magnet are set up. The first magnet and the second magnet attract each other to fix the arc plate, and at the same time, it is easy to replace the arc plate.

[0015] Furthermore, the bristles are arranged at an angle, and the distance from the end of the bristle away from the arc plate to the lead screw axis is less than the distance from the end of the bristle connected to the arc plate to the lead screw axis.

[0016] Furthermore, the inner wall of the fixed tube is provided with several circumferentially spaced limiting grooves along the length of the fixed tube. The limiting grooves penetrate the fixed tube on the side away from the mounting ring. The length of the limiting grooves is less than the length of the fixed tube. A limiting block connected to the sliding rod is slidably disposed in the limiting groove.

[0017] By adopting the above technical solution, a limiting groove and a limiting block are set. When the sliding rod slides, the limiting block slides in the limiting groove to restrict the sliding rod and prevent the sliding rod from sliding out of the fixed tube.

[0018] In summary, this utility model has the following beneficial effects:

[0019] 1. In this application, an installation tube, a rubber ring, an arc-shaped plate, and brush bristles are provided. The rubber ring prevents dust and debris on the surface of the screw from entering the nut. When it is necessary to clean dust and debris on a certain side of the rubber ring, the screw rotates to drive the nut to move towards the installation plate adjacent to the rubber ring to be cleaned. Simultaneously, the screw rotation drives the installation plate, the fixing tube, and the installation ring to rotate. When the nut moves and the installation tube contacts the abutment, the brush bristles contact the surface of the rubber ring. The screw continues to drive the nut to move, pushing the installation ring and the sliding rod to move. At the same time, the installation ring and the brush bristles rotate relative to the rubber ring, thereby sweeping away dust and debris from the surface of the rubber ring, preventing dust and debris from breaking through the seal of the rubber ring and seeping into the nut, ensuring the normal performance of the nut.

[0020] 2. In this application, a compression spring is fitted on the fixed tube. When the mounting ring moves, the compression spring is compressed. When the nut moves away from the mounting ring, the compression spring pushes the mounting ring back to its original position under the action of elastic force. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present utility model;

[0022] Figure 2 yes Figure 1 Enlarged view of part A;

[0023] Figure 3 This is a schematic diagram of the structure of the mounting plate and mounting ring in an embodiment of this utility model;

[0024] Figure 4 This is a schematic diagram of the structure of the mounting ring, rotating ring, and arc plate in an embodiment of this utility model;

[0025] Figure 5 This is a schematic diagram of the structure of the arc-shaped plate and the second magnet in an embodiment of this utility model;

[0026] Figure 6 This is a schematic diagram of the mounting ring structure according to an embodiment of the present invention;

[0027] Figure 7This is a schematic diagram of the internal structure of the fixing tube in an embodiment of this utility model.

[0028] In the diagram: 10, lead screw; 20, nut; 21, mounting tube; 22, rubber ring; 30, mounting plate; 31, fixing tube; 311, limiting groove; 312, limiting block; 32, sliding rod; 33, mounting ring; 34, abutment; 35, compression spring; 36, rotating ring; 37, arc groove; 38, first magnet; 40, arc plate; 41, brush bristles; 42, second magnet. Detailed Implementation

[0029] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0030] like Figure 1-7As shown in the embodiment of this application, a sealed dustproof lead screw structure is disclosed, including a lead screw 10 and a nut 20. The nut 20 is sleeved on the lead screw 10 and threadedly engaged with the lead screw 10. Both ends of the nut 20 are provided with mounting tubes 21 arranged concentrically with the lead screw 10. A rubber ring 22 is provided inside the mounting tube 21, and the inner wall of the rubber ring 22 mates with the surface of the lead screw 10. When the nut 20 moves on the lead screw 10, the rubber ring 22 prevents dust and debris from the surface of the lead screw 10 from entering the interior of the nut 20. Both ends of the lead screw 10 are fixedly fitted with an integrally annular mounting plate 30. Several fixing tubes 31 are circumferentially spaced on the mounting plate 30. Specifically, there are four fixing tubes 31. A sliding rod 32 is slidably arranged inside each of the four fixing tubes 31. A mounting ring 33 is provided at the end of the four sliding rods 32 away from the mounting plate 30. The mounting ring 33 is concentrically arranged with the lead screw 10. The mounting ring 33 has several abutments 34 spaced circumferentially on the side away from the sliding rod 32. Specifically, there are four abutments 34. Two arc-shaped plates 40 are symmetrically arranged on the side of the mounting ring 33 away from the sliding rod 32, and several brush bristles 41 are arranged on the side of the arc-shaped plates 40 away from the sliding rod 32. When it is necessary to clean dust and debris on a certain side of the rubber ring 22, the screw 10 is rotated to drive the nut 20 to move towards the mounting plate 30 adjacent to the rubber ring 22 that needs cleaning. The rotation of the screw 10 simultaneously drives the mounting plate 30, the fixing tube 31, and the mounting ring 33 to rotate. When the nut 20 moves and the mounting tube 21 contacts the abutments 34, the brush bristles 41 contact the surface of the rubber ring 22. The lead screw 10 continues to drive the nut 20 to move, pushing the mounting ring 33 and sliding rod 32 to move. At the same time, the mounting ring 33 and brush 41 rotate relative to the rubber ring 22, thereby sweeping away the dust and debris on the surface of the rubber ring 22, preventing dust and debris from breaking through the seal of the rubber ring 22 and seeping into the nut 20, thus ensuring the normal performance of the nut 20.

[0031] Specifically, a compression spring 35 is fitted onto the fixing tube 31. One end of the compression spring 35 is connected to the mounting plate 30, and the other end is connected to the mounting ring 33. When the nut 20 moves away from the mounting ring 33, the compression spring 35 pushes the mounting ring 33 back to its original position under the action of elastic force. A rotating ring 36 is rotatably fitted onto the mounting ring 33. Several abutments 34 are circumferentially spaced on the rotating ring 36. The orthographic projections of the abutments 34 are all located in the annular area at the end of the mounting tube 21, so that the abutments 34 can rotate relative to the mounting ring 33 around the lead screw 10. Therefore, when the mounting ring 33 rotates relative to the rubber ring 22 after the abutments 34 come into contact with the mounting tube 21, the abutments 34 will not move on the surface of the mounting tube 21.

[0032] During setup, to facilitate replacement of the arc plate 40 and brush bristles 41 after they become soiled, two symmetrical arc grooves 37 are formed on the side of the mounting ring 33 away from the sliding rod 32. The arc plate 40 mates with the corresponding arc groove 37. A first magnet 38 is provided at the bottom of the arc groove 37, and a second magnet 42 is provided on the side of the arc plate 40 away from the brush bristles 41. The first magnet 38 and the second magnet 42 attract each other, fixing the arc plate 40 in place. To disassemble the arc plate 40, simply pull the brush bristles 41. When the pulling force is greater than the attraction between the first magnet 38 and the second magnet 42, the arc plate 40 can be removed. The brush bristles 41 are arranged at an angle, and the distance from the end of the brush bristles 41 away from the arc plate 40 to the axis of the lead screw 10 is less than the distance from the end of the brush bristles 41 connected to the arc plate 40 to the axis of the lead screw 10. This results in smaller dead angles and better cleaning effect of the brush bristles 41 on the surface of the rubber ring 22.

[0033] To prevent the sliding rod 32 from sliding out of the fixed tube 31, a number of circumferentially spaced limiting grooves 311 are provided on the inner wall of the fixed tube 31 along the length of the fixed tube 31. Specifically, there are two limiting grooves 311. The side of the limiting groove 311 away from the mounting ring 33 passes through the fixed tube 31. The length of the limiting groove 311 is less than the length of the fixed tube 31. A limiting block 312 connected to the sliding rod 32 is slidably arranged in the limiting groove 311. When the sliding rod 32 slides, the limiting block 312 slides in the limiting groove 311 to limit the position of the sliding rod 32.

[0034] The operating principle of the sealed dustproof screw structure in this embodiment is as follows: When it is necessary to clean dust and debris on a certain side of the rubber ring 22, the screw 10 is rotated to drive the nut 20 to move towards the mounting plate 30 adjacent to the rubber ring 22 that needs to be cleaned. Simultaneously, the screw 10 rotates, causing the mounting plate 30, the fixing tube 31, and the mounting ring 33 to rotate. When the nut 20 moves and the mounting tube 21 contacts the abutment 34, the brush bristles 41 contact the surface of the rubber ring 22. The screw 10 continues to drive the nut 20 to move, pushing the mounting ring 33 and the sliding rod 32 to move, compressing the compression spring 35. At the same time, the mounting ring 33 and the brush bristles 41 rotate relative to the rubber ring 22, thereby sweeping away the dust and debris from the surface of the rubber ring 22.

[0035] The above description is merely a preferred embodiment of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are protected. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within the protection scope of this utility model.

Claims

1. A sealed dustproof lead screw structure, characterized in that: The device includes a lead screw (10) and a nut (20) sleeved on the lead screw (10) and threadedly engaged with the lead screw (10). The nut (20) has mounting tubes (21) arranged concentrically with the lead screw (10) at both ends. A rubber ring (22) is installed inside the mounting tube (21), and the inner wall of the rubber ring (22) mates with the surface of the lead screw (10). An integrally annular mounting plate (30) is fixedly sleeved at both ends of the lead screw (10), and the mounting plate (30) is circumferentially spaced... A plurality of fixed tubes (31) are provided, and a sliding rod (32) is slidably arranged inside the fixed tube (31). A mounting ring (33) is provided at the end of the plurality of sliding rods (32) away from the mounting plate (30). A plurality of abutments (34) are arranged circumferentially at intervals on the side of the mounting ring (33) away from the sliding rods (32). Two arc-shaped plates (40) are symmetrically arranged on the side of the mounting ring (33) away from the sliding rods (32). A plurality of bristles (41) are provided on the arc-shaped plates (40).

2. The sealed dustproof lead screw structure according to claim 1, characterized in that: A compression spring (35) is fitted on the fixed tube (31). One end of the compression spring (35) is connected to the mounting plate (30), and the other end is connected to the mounting ring (33).

3. The sealed dustproof lead screw structure according to claim 1, characterized in that: A rotating ring (36) is rotatably sleeved on the mounting ring (33), and a plurality of abutments (34) are circumferentially spaced on the rotating ring (36). The orthographic projections of the plurality of abutments (34) are all located in the annular area at the end of the mounting tube (21).

4. The sealed dustproof lead screw structure according to claim 1, characterized in that: The mounting ring (33) has two symmetrical arc-shaped grooves (37) on the side away from the sliding rod (32), and the arc-shaped plate (40) cooperates with the corresponding arc-shaped grooves (37).

5. The sealed dustproof lead screw structure according to claim 4, characterized in that: The bottom of the arc-shaped groove (37) is provided with a first magnet (38), and the side of the arc-shaped plate (40) away from the bristles (41) is provided with a second magnet (42).

6. The sealed dustproof lead screw structure according to claim 1, characterized in that: The bristles (41) are arranged at an angle, and the distance from the end of the bristles (41) away from the arc plate (40) to the axis of the lead screw (10) is less than the distance from the end of the bristles (41) connected to the arc plate (40) to the axis of the lead screw (10).

7. The sealed dustproof lead screw structure according to claim 1, characterized in that: The inner wall of the fixed tube (31) is provided with a plurality of circumferentially spaced limiting grooves (311) along the length of the fixed tube (31). The limiting grooves (311) pass through the fixed tube (31) on the side away from the mounting ring (33). The length of the limiting grooves (311) is less than the length of the fixed tube (31). A limiting block (312) connected to the sliding rod (32) is slidably disposed in the limiting grooves (311).

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