Ball screw nut with composite dustproof structure

Abstract

The utility model belongs to the field of ball screw nuts, and particularly relates to a ball screw nut with a composite dustproof structure, which comprises a ball screw nut component and a dustproof component. Wherein the inner wall of a nut body of the ball screw nut assembly is provided with a spiral groove and is filled with felt strips, the inner wall of a connecting sleeve of the dustproof assembly is provided with a plurality of groups of first oil-resistant rubber scraping strips and second oil-resistant rubber scraping strips which are circumferentially distributed at equal angles and have complementary space included angles, and the connecting sleeve is in threaded connection with threaded grooves in the two sides of the nut body through convex blocks. According to the structure, through the composite dustproof design of felt adsorption and rubber scraping strip scraping, multi-stage interception of impurities such as dust and oil dirt is achieved, the problem that a traditional single dustproof structure is insufficient in effect is solved, the dustproof efficiency and maintenance adaptability of the ball screw nut are improved, and the structure is suitable for high-precision mechanical transmission scenes.

Description

A ball screw nut with a composite dustproof structure Technical Field

[0001] This utility model relates to the field of ball screw nuts, specifically a ball screw nut with a composite dustproof structure. Background Technology

[0002] In the field of mechanical transmission, ball screw nuts are key components for converting linear motion into rotary motion. Dust, iron filings, oil stains and other impurities in their working environment can easily cause wear on transmission components, affecting the accuracy and service life of the equipment.

[0003] In existing technologies, traditional dustproof structures (such as single rubber seals or felt dustproofs) typically suffer from limited dustproof effectiveness, susceptibility to aging, or failure after adsorption saturation, making it difficult to meet the long-term stable operation requirements of high-precision equipment under complex working conditions. For example, when equipment operates in a dusty environment, a single dustproof structure cannot effectively intercept fine particles. Impurities entering the ball groove will increase the friction between the balls and the lead screw, leading to a decrease in transmission efficiency and even causing equipment failure.

[0004] Therefore, a ball screw nut with a composite dustproof structure is proposed to address the above problems. Summary of the Invention

[0005] To address the shortcomings of traditional dustproof structures, such as insufficient dustproof performance, easy aging and failure, and inconvenient maintenance, this utility model proposes a ball screw nut with a composite dustproof structure.

[0006] The technical solution adopted by this utility model to solve its technical problem is: a ball screw nut with a composite dustproof structure, including a ball screw nut assembly and a dustproof assembly.

[0007] The ball screw nut assembly includes a ball screw nut body, with threaded grooves on both the left and right sides of the ball screw nut body, and a spiral groove on the inner wall of the ball screw nut body, the spiral groove being filled with felt strips.

[0008] The dustproof component includes a connecting sleeve, one side of which protrudes outward to form a protrusion, and a first oil-resistant rubber scraper and a second oil-resistant rubber scraper are fixedly connected to the inner wall of the connecting sleeve.

[0009] Preferably, the outer surface of the protrusion is provided with threads, and the threads engage with the threads in the threaded groove.

[0010] Preferably, the spiral grooves are equidistantly distributed within the ball screw nut body and have the same depth as the ball track grooves.

[0011] Preferably, there are multiple first and second oil-resistant rubber scrapers, and they are all distributed in an equiangular circumferential pattern on the inner wall of the connecting sleeve.

[0012] Preferably, the plurality of second oil-resistant rubber scrapers and the plurality of first oil-resistant rubber scrapers form a complementary spatial angle.

[0013] Preferably, the two dustproof components are symmetrically distributed about the ball screw nut assembly.

[0014] Preferably, the outer surface of the connecting sleeve overlaps the outer surface of the ball screw nut body.

[0015] The advantages of this utility model are:

[0016] 1. This utility model achieves a composite dustproof function of "felt adsorption + rubber scraping" by filling the spiral groove in the inner wall of the ball screw nut body with felt strips and setting a first oil-resistant rubber scraper and a second oil-resistant rubber scraper that are circumferentially distributed at equal angles and form complementary spatial angles on the inner wall of the connecting sleeve. This solves the problem that the traditional single dustproof structure is not effective in intercepting dust, oil and other impurities, and improves the dustproof efficiency of the ball screw nut under complex working conditions.

[0017] 2. This utility model achieves the rapid installation and maintenance of a double dustproof barrier by symmetrically distributing two dustproof components about the ball screw nut assembly and using the threaded engagement of the protrusion and the threaded groove to realize a detachable connection. This solves the problems of inconvenient installation and difficult maintenance of traditional dustproof structures and improves the adaptability of equipment maintenance. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 is a schematic diagram of the structure of the ball screw nut of this utility model;

[0020] Figure 2 is a schematic diagram of the left side of the ball screw nut of this utility model;

[0021] Figure 3 is a schematic diagram of the internal structure of the ball screw nut of this utility model;

[0022] Figure 4 is a structural schematic diagram of the composite dustproof component of this utility model.

[0023] In the figure: 1. Ball screw nut assembly; 101. Ball screw nut body; 102. Thread groove; 103. Helical groove; 104. Felt strip; 2. Dustproof assembly; 201. Connecting sleeve; 202. Protrusion; 203. First oil-resistant rubber scraper; 204. Second oil-resistant rubber scraper. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0025] The present application will be further described in detail below with reference to Figures 1-4.

[0026] This application discloses a ball screw nut with a composite dustproof structure. Referring to Figures 1 to 4, a ball screw nut with a composite dustproof structure includes a ball screw nut assembly 1 and a dustproof assembly 2.

[0027] The ball screw nut assembly 1 includes a ball screw nut body 101. Threaded grooves 102 are provided on both the left and right sides of the ball screw nut body 101. A spiral groove 103 is provided on the inner wall of the ball screw nut body 101. Felt strips 104 are filled in the spiral groove 103. The spiral grooves 103 are equidistantly distributed in the ball screw nut body 101 and have the same depth as the ball track groove.

[0028] The spiral groove 103 on the inner wall of the ball screw nut body 101 is filled with felt strips 104, and the spiral grooves are evenly distributed and have the same depth as the ball grooves. When the screw moves inside the nut, the fibrous structure of the felt strips 104 can adsorb particulate impurities such as dust and oil in the air, preventing them from entering the ball track groove, avoiding wear between the balls and the screw due to impurities, and ensuring transmission accuracy.

[0029] Preferably, the felt strip 104 is made of high-density wool felt, which has fine and strong fibers, and its ability to absorb fine dust and oil stains is improved compared with ordinary felt.

[0030] Preferably, a slot is provided on the inner wall of the connecting sleeve 201 at the corresponding position. During installation, adhesive is applied first, and then the scraper is inserted into the slot. After the adhesive cures, the first oil-resistant rubber scraper 203 and the second oil-resistant rubber scraper 204 are firmly connected to the connecting sleeve 201, ensuring that the scraper will not fall off during the high-speed movement of the screw. The scraper material is nitrile rubber, which has good oil resistance and wear resistance.

[0031] The dustproof component 2 includes a connecting sleeve 201. One side of the connecting sleeve 201 protrudes outward to form a protrusion 202. A first oil-resistant rubber scraper 203 and a second oil-resistant rubber scraper 204 are fixedly connected to the inner wall of the connecting sleeve 201. The outer surface of the protrusion 202 is provided with threads, and the threads engage with the internal threads of the threaded groove 102. There are multiple first oil-resistant rubber scrapers 203 and multiple second oil-resistant rubber scrapers 204, and they are all circumferentially distributed at equal angles on the inner wall of the connecting sleeve 201. The multiple second oil-resistant rubber scrapers 204 and the multiple first oil-resistant rubber scrapers 203 form complementary spatial angles. The two dustproof components 2 are symmetrically distributed about the ball screw nut assembly 1. The outer surface of the connecting sleeve 201 overlaps the outer surface of the ball screw nut body 101.

[0032] The first oil-resistant rubber scraper 203 and the second oil-resistant rubber scraper 204 on the inner wall of the connecting sleeve 201 are circumferentially distributed at equal angles and form a complementary spatial angle. When the lead screw passes through the dustproof assembly, the scraper closely adheres to the surface of the lead screw and scrapes away dust, iron filings and other impurities attached to its surface as the lead screw moves.

[0033] The distribution and spatial angle design of multiple first oil-resistant rubber scrapers 203 and second oil-resistant rubber scrapers 204 can cover the screw surface from different angles, avoiding blind spots of a single scraper and improving scraping efficiency.

[0034] The dustproof component 2 is installed on both sides of the nut body through the threaded engagement of the protrusion 202 and the threaded groove 102, and is symmetrically distributed on the left and right sides to form a double dustproof barrier to prevent dust from entering from both ends of the nut.

[0035] The outer surface of the connecting sleeve 201 overlaps with the outer surface of the nut body 101 to reduce gaps and prevent dust from bypassing the first oil-resistant rubber scraper 203 and the second oil-resistant rubber scraper 204 to enter the interior.

[0036] Working principle:

[0037] I. Installation Phase

[0038] Component assembly:

[0039] Fill the felt strip 104 into the spiral groove 103 on the inner wall of the ball screw nut body 101, ensuring that the felt strip fits tightly against the groove wall without any looseness or gaps.

[0040] The first oil-resistant rubber scraper 203 and the second oil-resistant rubber scraper 204 are fixed in a circularly distributed manner at equal angles on the inner wall of the connecting sleeve 201 to ensure that the spatial angles between the two are complementary.

[0041] Dustproof component installation:

[0042] The protrusions 202 of the two dustproof components 2 are screwed into the threaded grooves 102 on the left and right sides of the nut body, respectively. The threads are tightened to ensure that the outer surface of the connecting sleeve is tightly connected to the outer surface of the nut body, thus ensuring that the dustproof components are fixed in position and well sealed.

[0043] Overall assembly: Install the assembled ball screw and nut assembly onto the screw of the equipment, so that the screw passes through the connecting sleeve of the nut body and the dustproof component, ensuring smooth and unobstructed contact between the screw, nut, and scraper.

[0044] II. Work Phase

[0045] Dust prevention triggered by lead screw movement: When the equipment drives the lead screw to rotate or move linearly, the lead screw and nut will have relative movement.

[0046] Felt strips adsorb impurities: During the movement of the lead screw, the felt strips 104 in the spiral grooves make slight contact with the surface of the lead screw. The fibers adsorb to capture dust and oil particles that are brought into the nut by the movement of the lead screw, and intercept them in the spiral grooves to prevent them from entering the ball circulation track.

[0047] Scraper removes impurities:

[0048] The first oil-resistant rubber scraper 203 and the second oil-resistant rubber scraper 204 are in close contact with the surface of the lead screw, and scrape off larger particulate impurities such as iron filings and dust attached to the surface as the lead screw moves.

[0049] Since the two have complementary spatial angles, they can scrape the surface of the lead screw from different directions one after another, scraping impurities into the gap between the connecting sleeve and the lead screw, or scraping them directly away from the lead screw.

[0050] 4. Impurity discharge and interception: Some of the scraped-off impurities accumulate inside the connecting sleeve, while some are discharged outside the nut through the gap between the connecting sleeve and the lead screw; the impurities adsorbed by the felt strip are temporarily retained in the spiral groove until adsorption saturation is reached.

[0051] III. Maintenance Phase

[0052] Regularly clean the scraper blades and connecting sleeves: Disassemble the dustproof component 2, and wipe the surface of the first oil-resistant rubber scraper blade 203, the second oil-resistant rubber scraper blade 204 and the inner wall of the connecting sleeve 201 with a clean cloth or solvent to remove accumulated impurities and restore the scraping performance of the scraper blades.

[0053] Replace the felt strip 204: When the felt strip 104 becomes saturated with adsorption or is damaged, remove the old felt strip 204 and replace it with a new felt strip 204 to fill the spiral groove 103 to ensure that the adsorption and dust prevention function is effective.

[0054] Check component connections: When reinstalling dustproof component 2, check whether the thread fit between the protrusion 202 and the threaded groove 102 is loose, and whether the overlap between the connecting sleeve 201 and the nut body 101 is sealed. If necessary, replace the seal or retighten to ensure the integrity of the dustproof structure.

[0055] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. A ball screw nut with a composite dustproof structure, characterized in that, include: A ball screw nut assembly (1) includes a ball screw nut body (101), with threaded grooves (102) on both the left and right sides of the ball screw nut body (101) and a spiral groove (103) on the inner wall of the ball screw nut body (101), the spiral groove (103) being filled with felt strips (104); a dustproof assembly (2) includes a connecting sleeve (201), one side of the connecting sleeve (201) protruding outward to form a protrusion (202), and a first oil-resistant rubber scraper (203) and a second oil-resistant rubber scraper (204) being fixedly connected to the inner wall of the connecting sleeve (201).

2. The ball screw nut with a composite dustproof structure according to claim 1, characterized in that: The outer surface of the protrusion (202) is provided with threads, and the threads engage with the internal threads of the threaded groove (102).

3. A ball screw nut with a composite dustproof structure according to claim 1, characterized in that: The spiral grooves (103) are evenly distributed within the ball screw nut body (101) and have the same depth as the ball track grooves.

4. A ball screw nut with a composite dustproof structure according to claim 1, characterized in that: The number of the first oil-resistant rubber scraper (203) and the second oil-resistant rubber scraper (204) are both multiple, and they are all distributed in an equal-angled circumferential pattern on the inner wall of the connecting sleeve (201).

5. A ball screw nut with a composite dustproof structure according to claim 4, characterized in that: The plurality of second oil-resistant rubber scrapers (204) and the plurality of first oil-resistant rubber scrapers (203) form a complementary spatial angle.

6. A ball screw nut with a composite dustproof structure according to claim 1, characterized in that: Two dustproof components (2) are symmetrically distributed about the ball screw nut assembly (1).

7. A ball screw nut with a composite dustproof structure according to claim 1, characterized in that: The outer surface of the connecting sleeve (201) overlaps the outer surface of the ball screw nut body (101).

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