Ball screw with dustproof structure

Abstract

The utility model discloses a ball screw with a dustproof structure, relates to the field of ball screws, and aims to solve the problems that dust at threads of the existing ball screws is mostly removed by arranging scrapers or brushes, but lubricating oil is smeared on the threads of the ball screws, and after the dust falls into the lubricating oil, the lubricating oil cannot be smeared on the threads of the ball screws. The problem that dust cannot be completely removed through an existing removing mechanism is solved. A threaded part is arranged on the lead screw, a nut is connected to the middle of the threaded part, first connecting rings are fixedly connected to the two sides of the nut correspondingly, bearings are detachably and fixedly connected to the positions, on the two sides of the threaded part, of the lead screw correspondingly, and second connecting rings are fixedly connected to one sides of the bearings correspondingly. Flexible telescopic sleeves are connected between the two sides of the nut and the two bearings correspondingly, a third connecting ring is fixedly connected to one side of each flexible telescopic sleeve, and a fourth connecting ring is fixedly connected to the other side of each flexible telescopic sleeve.

Description

Technical Field

[0001] This utility model relates to the field of ball screws, specifically a ball screw with a dustproof 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 axial reciprocating force, while also possessing the characteristics of high precision, reversibility, and high efficiency. Due to their very low frictional resistance, ball screws are widely used in various industrial equipment and precision instruments.

[0003] For example, patent announcement number CN 214838213 U discloses a novel dustproof ball screw structure, comprising a screw, with a ball nut threadedly connected to the outer wall of the screw. A cleaning structure is installed on the outer wall of the ball nut, comprising a short plate, a rotating plate, a torsion spring, and a brush. One end of the short plate is fixedly connected to the outer wall of the ball nut, and the inner wall of the short plate is rotatably connected to the top of the rotating plate. The rotating plate drives the brush to rotate on the threaded outer wall of the screw, pushing away dust from the threads, thus preventing dust accumulation and facilitating cleaning. This ensures the normal movement of the ball nut, and further drives the inclined plate to rotate inward. When the rotating inclined plate cooperates with the slider, the straight plate moves downward to press against the inserted connecting plate, improving connection stability, preventing shaking during use, and enhancing practicality. Pressing down on the bent rod causes it to move downward on the inner wall of the short cylinder, while the other side of the bent rod inserts into the oil port, achieving a seal and preventing oil port blockage, ensuring normal lubrication and facilitating widespread use.

[0004] Most existing ball screws use scrapers or brushes to remove dust from the threads. However, lubricating oil is applied to the threads, and when dust falls onto the lubricating oil, existing cleaning mechanisms are unable to completely remove it. Therefore, there is an urgent market need to develop a ball screw with a dustproof structure to help solve the existing problems. Utility Model Content

[0005] The purpose of this utility model is to provide a ball screw with a dustproof structure to solve the problem mentioned in the background art that most existing ball screws remove dust from the threads by using scrapers or brushes, but the threads are coated with lubricating oil, and when dust falls onto the lubricating oil, the existing cleaning mechanisms are difficult to completely remove the dust.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a ball screw with a dustproof structure, comprising a screw, a threaded portion on the screw, a nut connected to the center of the threaded portion, first connecting rings fixedly connected to both sides of the nut, bearings detachably fixedly connected to the screw on both sides of the threaded portion, second connecting rings fixedly connected to one side of each bearing, flexible telescopic sleeves connected between the nut and the two bearings on both sides, a third connecting ring fixedly connected to one side of the flexible telescopic sleeve, and a fourth connecting ring fixedly connected to the other side of the flexible telescopic sleeve.

[0007] Preferably, the outer end faces of the first connecting rings on both sides of the nut are provided with a first external thread.

[0008] Preferably, the inner end face of the third connecting ring on the flexible telescopic sleeve is provided with a first internal thread.

[0009] Preferably, the first connecting rings on both sides of the nut are respectively inserted into the third connecting rings on the two flexible telescopic sleeves and are fixed by threaded connection between the first external thread and the first internal thread.

[0010] Preferably, a limiting ring is fixedly connected to the outer end face of the bearing, and a second external thread is provided on the inner end face of the second connecting ring on the bearing.

[0011] Preferably, the inner end face of the fourth connecting ring on the flexible telescopic sleeve is provided with a second internal thread.

[0012] Preferably, the second connecting rings on one side of the two bearings are respectively inserted into the interior of the fourth connecting rings on the two flexible telescopic sleeves and fixed by threaded connection between the second external thread and the second internal thread.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] 1. In this utility model, by setting flexible telescopic sleeves, flexible telescopic sleeves are connected between the two sides of the nut 2 and two bearings respectively. When the lead screw rotates, it drives the nut to move on the threaded part. The flexible telescopic sleeve and the lead screw rotate through the bearings, so that when the nut moves, the flexible telescopic sleeve in the moving direction is compressed, and at the same time the flexible telescopic sleeve in the opposite direction is stretched. The two flexible telescopic sleeves respectively wrap and seal the threaded parts on both sides of the nut to prevent external dust from falling into the threaded part on the lead screw, thus achieving dust prevention.

[0015] 2. In this utility model, by setting the third connecting ring, the first connecting rings on both sides of the nut are respectively inserted into the third connecting rings on the two flexible telescopic sleeves and are fixed by threaded connection between the first external thread and the first internal thread, so that the nut and the two flexible telescopic sleeves are fixedly connected. At the same time, by rotating the third connecting ring, the third connecting ring is separated from the first connecting ring, so that the flexible telescopic sleeve can be removed from the nut, which is convenient for later maintenance and repair.

[0016] 3. In this utility model, by setting a fourth connecting ring, the second connecting rings on one side of the two bearings are respectively inserted into the interior of the fourth connecting rings on the two flexible telescopic sleeves and are fixed by threaded connection between the second external thread and the second internal thread. When the second connecting ring is connected to the fourth connecting ring, the position of the fourth connecting ring is limited by the limiting ring, so that the bearing and the flexible telescopic sleeve are fixedly connected, and the flexible telescopic sleeve can rotate on the screw. By rotating the fourth connecting ring, the fourth connecting ring is separated from the second connecting ring, and the flexible telescopic sleeve can be disassembled from the bearing, which is convenient for later maintenance and repair. Attached Figure Description

[0017] Figure 1 This is a front view of a ball screw with a dustproof structure according to the present invention;

[0018] Figure 2 This is a front sectional view of the present invention;

[0019] Figure 3 This is a detailed enlarged view of part A of the present invention;

[0020] Figure 4 This is a detailed enlarged view of part B of this utility model.

[0021] In the diagram: 1. Lead screw; 101. Threaded part; 2. Nut; 201. First connecting ring; 202. First external threaded part; 3. Bearing; 301. Limiting ring; 302. Second connecting ring; 303. Second external threaded part; 4. Flexible telescopic sleeve; 401. Third connecting ring; 402. First internal threaded part; 403. Fourth connecting ring; 404. Second internal threaded part. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0023] Please see Figure 1-4This utility model provides an embodiment of a ball screw with a dustproof structure, comprising a screw 1, a threaded portion 101 on the screw 1, a nut 2 connected to the middle of the threaded portion 101, first connecting rings 201 fixedly connected to both sides of the nut 2, bearings 3 detachably fixedly connected to the screw 1 on both sides of the threaded portion 101, second connecting rings 302 fixedly connected to one side of each bearing 3, and flexible telescopic sleeves 4 connected between each side of the nut 2 and the two bearings 3 respectively, a third connecting ring 401 fixedly connected to one side of the flexible telescopic sleeve 4, and a fourth connecting ring 403 fixedly connected to the other side of the flexible telescopic sleeve 4. When the screw 1 rotates, it drives the nut 2 to move on the threaded portion 101. The flexible telescopic sleeve 4 rotates with the screw 1 through the bearings 3, causing the flexible telescopic sleeve 4 to compress in the direction of movement and stretch in the opposite direction when the nut 2 moves. The two flexible telescopic sleeves 4 respectively wrap and seal the threaded portion 101 on both sides of the nut 2, preventing external dust from falling into the threaded portion 101 on the screw 1, thus achieving dustproofing.

[0024] Furthermore, a first external thread portion 202 is provided on the outer end face of the first connecting ring 201 on both sides of the nut 2.

[0025] Furthermore, the inner end face of the third connecting ring 401 on the flexible telescopic sleeve 4 is provided with a first internal thread 402.

[0026] Furthermore, the first connecting rings 201 on both sides of the nut 2 are respectively inserted into the third connecting rings 401 on the two flexible telescopic sleeves 4 and are fixedly connected by the first external thread 202 and the first internal thread 402, so that the nut 2 is fixedly connected to the two flexible telescopic sleeves 4. At the same time, the third connecting ring 401 is rotated to separate the third connecting ring 401 from the first connecting ring 201, so that the flexible telescopic sleeve 4 can be removed from the nut 2, which is convenient for later maintenance and repair.

[0027] Furthermore, a limiting ring 301 is fixedly connected to the outer end face of the bearing 3, and a second external thread 303 is provided on the inner end face of the second connecting ring 302 on the bearing 3.

[0028] Furthermore, the inner end face of the fourth connecting ring 403 on the flexible telescopic sleeve 4 is provided with a second internal thread 404.

[0029] Furthermore, the second connecting rings 302 on one side of the two bearings 3 are respectively inserted into the fourth connecting rings 403 on the two flexible telescopic sleeves 4 and are fixedly connected by the second external thread 303 and the second internal thread 404. When the second connecting ring 302 is connected to the fourth connecting ring 403, the position of the fourth connecting ring 403 is limited by the limiting ring 301, so that the bearings 3 and the flexible telescopic sleeves 4 are fixedly connected, and the flexible telescopic sleeves 4 can rotate on the lead screw 1. By rotating the fourth connecting ring 403, the fourth connecting ring 403 is separated from the second connecting ring 302, and the flexible telescopic sleeves 4 can be disassembled from the bearings 3, which is convenient for later maintenance and repair.

[0030] Working Principle: During use, the lead screw 1 has a threaded section 101, with a nut 2 connected to the center of the threaded section 101. First connecting rings 201 are fixedly connected to both sides of the nut 2. Bearings 3 are detachably fixedly connected to both sides of the lead screw 1 and the threaded section 101. Second connecting rings 302 are fixedly connected to one side of each bearing 3. Flexible telescopic sleeves 4 are connected between each side of the nut 2 and the two bearings 3. A third connecting ring 401 is fixedly connected to one side of each flexible telescopic sleeve 4, and a fourth connecting ring 403 is fixedly connected to the other side. The first connecting rings 201 on both sides of the nut 2 are inserted into the third connecting rings 401 on the two flexible telescopic sleeves 4 and are threadedly connected to the first internal thread 402 via the first external thread 202, thus fixing the nut 2 to the two flexible telescopic sleeves 4. Simultaneously rotating the third connecting ring 401 separates it from the first connecting ring 201, allowing the flexible telescopic sleeve 4 to be removed from the nut 2 for easy maintenance and repair. Ring 302 is inserted into the fourth connecting ring 403 on each of the two flexible telescopic sleeves 4 and is fixedly connected to the second internal thread 404 through the second external thread 303. When the second connecting ring 302 is connected to the fourth connecting ring 403, the position of the fourth connecting ring 403 is limited by the limiting ring 301, so that the bearing 3 and the flexible telescopic sleeve 4 are fixedly connected, and the flexible telescopic sleeve 4 can rotate on the screw 1. Rotating the fourth connecting ring 403 separates the fourth connecting ring 403 from the second connecting ring 302, so that the flexible telescopic sleeve 4 can be disassembled from the bearing 3 for easy maintenance and repair. When the screw 1 rotates, it drives the nut 2 to move on the threaded part 101. The flexible telescopic sleeve 4 and the screw 1 rotate through the bearing 3, so that when the nut 2 moves, it compresses the flexible telescopic sleeve 4 in the direction of movement and stretches the flexible telescopic sleeve 4 in the opposite direction. The two flexible telescopic sleeves 4 respectively wrap and seal the threaded parts 101 on both sides of the nut 2 to prevent external dust from falling into the threaded parts 101 on the screw 1, thus achieving dust prevention.

[0031] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A ball screw with a dustproof structure, comprising a screw rod (1), characterized in that: The screw rod (1) is provided with a threaded part (101), the middle part of the threaded part (101) is connected with a nut (2), both sides of the nut (2) are fixedly connected with a first connecting ring (201), the screw rod (1) is detachably fixedly connected with a bearing (3) on both sides of the threaded part (101), one side of the bearing (3) is fixedly connected with a second connecting ring (302), both sides of the nut (2) are connected with two bearings (3) through a flexible telescopic sleeve (4), one side of the flexible telescopic sleeve (4) is fixedly connected with a third connecting ring (401), the other side of the flexible telescopic sleeve (4) is fixedly connected with a fourth connecting ring (403).

2. The ball screw with dustproof structure according to claim 1, characterized in that: The outer side end face of the first connecting ring (201) on both sides of the nut (2) is provided with a first outer threaded part (202).

3. The ball screw with dustproof structure according to claim 2, characterized in that: The inner side end face of the third connecting ring (401) on the flexible telescopic sleeve (4) is provided with a first inner threaded part (402).

4. The ball screw with dustproof structure according to claim 3, characterized in that: The first connecting ring (201) on both sides of the nut (2) is inserted into the third connecting ring (401) on the flexible telescopic sleeve (4) and is fixedly connected through the first outer threaded part (202) and the first inner threaded part (402).

5. The ball screw with dustproof structure according to claim 1, characterized in that: The outer side end face of the bearing (3) is fixedly connected with a limiting ring (301), and the inner side end face of the second connecting ring (302) on the bearing (3) is provided with a second outer threaded part (303).

6. The ball screw with dustproof structure according to claim 5, characterized in that: The inner side end face of the fourth connecting ring (403) on the flexible telescopic sleeve (4) is provided with a second inner threaded part (404).

7. The ball screw with dustproof structure according to claim 6, characterized in that: The second connecting ring (302) on one side of the bearing (3) is inserted into the fourth connecting ring (403) on the flexible telescopic sleeve (4) and is fixedly connected through the second outer threaded part (303) and the second inner threaded part (404).

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