Dustproof ball screw pair
By using a combination design of protective tube, scraper, brush ring and scratch tube in the ball screw pair, the problem of poor dust protection effect of the ball screw pair is solved, effectively blocking dust and cleaning in time, ensuring stable operation of the equipment.
Patent Information
- Application Number
- CN202422630348.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-30
- Publication Date
- 2025-07-22
- Estimated Expiration
- 2034-10-30
AI Technical Summary
The existing ball screw pair has poor dustproof effect, and impurities such as dust are prone to accumulate, affecting the performance of the equipment.
The screw is wrapped with a protective tube, and a scraper, a brush ring and a scratch tube are installed on its outer surface to scrape away dust and collect impurities through the dust outlet cavity.
Effectively block dust from entering, clean impurities on the surface of the screw in a timely manner, and ensure that the equipment works stably in harsh environments.
Smart Images
Figure CN223136859U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of transmission components, in particular to a dustproof ball screw pair. Background Art
[0002] The ball screw pair is an ideal transmission device that converts rotary motion into linear motion, or converts linear motion into rotary motion. It consists of a screw (also called a lead screw), a nut, and balls. The balls roll between the lead screw and the nut to form rolling friction. Compared with traditional sliding friction, this rolling friction greatly reduces friction, significantly improving transmission efficiency.
[0003] However, the prior art still has the following problems:
[0004] The ball screw pairs in the prior art usually have poor dust prevention effects, and most of them do not have a special protective tube to wrap the screw, so that the screw is directly exposed to the external environment and is easily corroded by dust, water vapor and other impurities in the air. In addition, the outer surface of most screws is not convenient for timely cleaning of dust. During long-term use, dust and other impurities will gradually accumulate on the surface of the screw, and the lack of effective cleaning methods will cause these impurities to increase, ultimately affecting the performance of the ball screw pair.
[0005] In view of the above problems, the inventor proposes a dustproof ball screw pair to solve the above problems. Utility Model Content
[0006] In order to solve the problem that the dustproof effect of the ball screw pair is not good; the purpose of the utility model is to provide a dustproof ball screw pair.
[0007] In order to solve the above technical problems, the utility model adopts the following technical scheme: a dustproof ball screw pair, including a protective tube, a screw body is arranged in the protective tube, a moving part is threadedly sleeved on the outer surface of the screw body, a mounting plate is fixedly arranged on the upper end of the moving part, a mechanism that needs to move linearly is installed on the upper end of the mounting plate, a limiting groove is arranged on the upper side of the outer surface of the protective tube, and the lower sides of the two ends of the mounting plate are respectively in active contact with the inner walls of the two sides of the limiting groove, a scraper is slidably arranged on the inner wall of the limiting groove, a push rod is fixedly arranged on the upper end of the scraper, a brush ring is fixedly arranged on the inner surface of the scraper, a dust outlet plate is arranged at the lower end of the protective tube, and a dust outlet cavity is jointly arranged on the lower inner wall of the protective tube and the dust outlet plate.
[0008] Preferably, a scratch tube is fixedly provided at both ends of the movable part, and the scratch tube is threadedly connected to the screw body, grooves are provided on the inner walls on both sides of the dust outlet chamber, and a baffle rod is slidably provided in the two grooves, and the outer surfaces at both ends of the baffle rod are respectively fitted with the inner walls of the two grooves, and a pulling plate is fixedly provided at one end of the baffle rod.
[0009] Compared with the prior art, the beneficial effects of the present utility model are as follows:
[0010] 1. The present utility model wraps the lead screw with a protective tube, which can block most of the external dust from entering the space where the lead screw is located, playing a preliminary dust-proof role. The brush ring and scraping tube on the scraper can timely clean the dust and other impurities on the outer surface of the lead screw, preventing the accumulation of dust from having an adverse effect on the normal operation of the lead screw, and ensuring that the ball screw pair can also work stably in a relatively harsh environment. BRIEF DESCRIPTION OF THE DRAWINGS
[0011] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.
[0012] Figure 1 It is a schematic diagram of the overall structure of the present utility model.
[0013] Figure 2 It is a schematic diagram of the cross-section of the protective tube and the related structure of the moving part of the present utility model.
[0014] Figure 3 It is an exploded view of the cross-section of the protective tube and the related structure of the scraper of the present utility model.
[0015] In the figure: 1. Protective tube; 2. Lead screw body; 3. Moving part; 4. Mounting plate; 41. Bolt groove; 42. Limit groove; 43. Slide bar; 44. Slide groove; 5. Scraping tube; 6. Scraper; 61. Push rod; 62. Brush ring; 7. Dust outlet plate; 71. Dust outlet cavity; 72. Groove; 73. Stop bar; 74. Pulling plate. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0016] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, rather than 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 efforts belong to the scope of protection of the present utility model.
[0017] Embodiment 1: As Figures 1-3As shown in the figure, the utility model provides a dust-proof ball screw pair, which includes a protection tube 1. Inside the protection tube 1, there is a screw rod body 2. One end of the screw rod body 2 is rotatably connected to the inner wall of one side of the protection tube 1. A moving member 3 is threadedly sleeved on the outer surface of the screw rod body 2. The outer surface of the moving member 3 is in movable contact with the inner wall of the protection tube 1. On both sides of the outer surface of the moving member 3, sliding strips 43 are fixedly provided, and on both inner walls of the protection tube 1, sliding grooves 44 are provided for cooperating with the sliding strips 43. At the upper end of the moving member 3, a mounting plate 4 is fixedly provided. Four bolt grooves 41 are provided at the upper end of the mounting plate 4. At the upper side of the outer surface of the protection tube 1, a limiting groove 42 is provided. One end of the screw rod body 2 inside the protection tube 1 is rotatably connected to the inner wall of the protection tube 1. When the screw rod body 2 rotates under the drive of an external force, since the outer surface of the moving member 3 is in movable contact with the inner wall of the protection tube 1 and the moving member 3 is threadedly sleeved on the screw rod body 2, and at the same time, the sliding strips 43 on both sides of the outer surface of the moving member 3 cooperate with the sliding grooves 44 on the inner wall of the protection tube 1, the rotational movement of the moving member 3 is restricted, so that the moving member 3 can only move linearly along the axial direction of the screw rod body 2. The mounting plate 4 at the upper end of the moving member 3 moves together with the moving member 3. The lower sides of both ends of the mounting plate 4 are in movable contact with the upper side of the outer surface of the protection tube 1 at the limiting groove 42, which further ensures the stability of the movement of the moving member 3. By wrapping the screw rod with the protection tube 1, most of the external dust can be blocked from entering the space where the screw rod is located, playing a preliminary dust-proof role.
[0018] The lower sides of both ends of the mounting plate 4 are respectively in movable contact with the inner walls of both sides of the limiting groove 42. A scraping plate 6 is slidably provided on the inner wall of the limiting groove 42. At the upper end of the scraping plate 6, a push rod 61 is fixedly provided. On the inner surface of the scraping plate 6, a brush ring 62 is fixedly provided. The inner wall of the brush ring 62 is in movable contact with the outer surface of the screw rod body 2. When the screw rod body 2 rotates to drive the moving member 3 to move, the mounting plate 4 slides in the limiting groove 42. The scraping plate 6 in the limiting groove 42 can be manually controlled to move through the push rod 61. The brush ring 62 on the inner surface of the scraping plate 6 is in movable contact with the outer surface of the screw rod body 2. During the rotation of the screw rod body 2, the brush ring 62 can continuously brush off dust and other impurities on the outer surface of the screw rod body 2.
[0019] At the lower end of the protection tube 1, there is a dust outlet plate 7. The lower inner wall of the protection tube 1 and the dust outlet plate 7 together form a dust outlet cavity 71. On both inner walls of the dust outlet cavity 71, grooves 72 are provided, and a blocking rod 73 is slidably provided in the two grooves 72 together. At one end of the blocking rod 73, a pulling plate 74 is fixedly provided. The dust and other impurities brushed off by the brush ring 62 will fall to the lower end of the protection tube 1 under the action of gravity. At the lower end of the protection tube 1, there is a dust outlet plate 7. The lower inner wall of the protection tube 1 and the dust outlet plate 7 together form a dust outlet cavity 71. The dust and other impurities fall into the dust outlet cavity 71 for collection. When it is necessary to clean the dust in the dust outlet cavity 71, the pulling plate 74 can be pulled to drive the blocking rod 73 to slide in the grooves 72 on both inner walls of the dust outlet cavity 71, opening the dust outlet cavity 71 to discharge the dust.
[0020] Example 2: As Figure 2 shown, scraping tubes 5 are fixedly provided at both ends of the moving member 3, and the scraping tubes 5 are in threaded fit connection with the screw rod body 2. The scraping tubes 5 fixed at both ends of the moving member 3 are in threaded fit connection with the screw rod body 2. During the movement of the moving member 3, the scraping tubes 5 also move together with the moving member 3. The scraping tubes 5 can further scrape off the impurities on the screw rod body 2, and together with the brush ring 62, improve the dust-proof cleaning effect. The brush ring 62 and the scraping tubes 5 on the scraper 6 can timely clean the dust and other impurities on the outer surface of the screw rod, prevent the accumulation of dust from having an adverse effect on the normal operation of the screw rod, and ensure that the ball screw pair can also work stably in a relatively harsh environment.
[0021] Working principle: One end of the screw rod body 2 in the protection tube 1 is rotatably connected to the inner wall of the protection tube 1. When the screw rod body 2 rotates under the drive of an external force, since the outer surface of the moving member 3 is in movable contact with the inner wall of the protection tube 1 and the moving member 3 is threadedly sleeved on the screw rod body 2, and at the same time, the slide bars 43 on both sides of the outer surface of the moving member 3 cooperate with the chute 44 on the inner wall of the protection tube 1, the rotational movement of the moving member 3 is restricted, so that the moving member 3 can only move linearly along the axial direction of the screw rod body 2. The mounting plate 4 at the upper end of the moving member 3 moves together with the moving member 3. The lower sides of both ends of the mounting plate 4 are in movable contact with the limiting grooves 42 on the upper side of the outer surface of the protection tube 1, further ensuring the stability of the movement of the moving member 3. By wrapping the screw rod with the protection tube 1, most of the external dust can be blocked from entering the space where the screw rod is located, playing a preliminary dust-proof role;
[0022] When the screw rod body 2 rotates to drive the moving member 3 to move, the mounting plate 4 slides in the limiting groove 42. The scraper 6 in the limiting groove 42 can be manually controlled to move through the push rod 61. The brush ring 62 on the inner surface of the scraper 6 is in movable contact with the outer surface of the screw rod body 2. During the rotation of the screw rod body 2, the brush ring 62 can continuously brush off the dust and other impurities on the outer surface of the screw rod body 2;
[0023] Dust and other impurities fall into the dust outlet cavity 71 for collection. When it is necessary to clean the dust in the dust outlet cavity 71, the pull plate 74 can be pulled to drive the stop rod 73 to slide in the grooves 72 on both inner walls of the dust outlet cavity 71 to open the dust outlet cavity 71 and discharge the dust;
[0024] The scraping tubes 5 fixed at both ends of the moving member 3 are in threaded fit connection with the screw rod body 2. During the movement of the moving member 3, the scraping tubes 5 also move together with the moving member 3. The scraping tubes 5 can further scrape off the impurities on the screw rod body 2, and together with the brush ring 62, improve the dust-proof cleaning effect. The brush ring 62 and the scraping tubes 5 on the scraper 6 can timely clean the dust and other impurities on the outer surface of the screw rod, prevent the accumulation of dust from having an adverse effect on the normal operation of the screw rod, and ensure that the ball screw pair can also work stably in a relatively harsh environment.
[0025] Obviously, those skilled in the art can make various changes and modifications to the present utility model without departing from the spirit and scope of the present utility model. Thus, if these modifications and variations of the present utility model fall within the scope of the claims of the present utility model and their equivalent technologies, the present utility model is also intended to include these changes and modifications.
Claims
1. A dust-proof ball screw pair, comprising a protective tube (1), characterized in that: A screw rod body (2) is arranged inside the protection tube (1). A moving member (3) is sleeved on the outer surface of the screw rod body (2) in a threaded manner. An installation plate (4) is fixedly arranged at the upper end of the moving member (3). A limiting groove (42) is formed in the upper side of the outer surface of the protection tube (1). The lower sides of both ends of the installation plate (4) are respectively in movable contact with the inner walls on both sides of the limiting groove (42). A scraping plate (6) is slidably arranged on the inner wall of the limiting groove (42). A push rod (61) is fixedly arranged at the upper end of the scraping plate (6). A brush ring (62) is fixedly arranged on the inner surface of the scraping plate (6). A dust outlet plate (7) is arranged at the lower end of the protection tube (1). A dust outlet cavity (71) is jointly formed by the lower inner wall of the protection tube (1) and the dust outlet plate (7).
2. The dust-proof ball screw pair according to claim 1, characterized in that: Scraping tubes (5) are fixedly arranged at both ends of the moving member (3), and the scraping tubes (5) are in threaded fit connection with the screw rod body (2).
3. A dust-proof ball screw pair according to claim 1, characterized in that: Four bolt grooves (41) are formed in the upper end of the installation plate (4).
4. A dust-proof ball screw pair according to claim 1, characterized in that: One end of the screw rod body (2) is rotatably connected to the inner wall of one side of the protection tube (1).
5. A dust-proof ball screw pair according to claim 1, characterized in that: Sliding strips (43) are fixedly arranged on both sides of the outer surface of the moving member (3), and sliding grooves (44) for cooperating with the sliding strips (43) are formed in the inner walls on both sides of the protection tube (1).
6. The dust-proof ball screw pair according to claim 1, characterized in that: The inner wall of the brush ring (62) is in movable contact with the outer surface of the screw rod body (2).
7. The dust-proof ball screw pair according to claim 1, characterized in that: Grooves (72) are formed in the inner walls on both sides of the dust outlet cavity (71). A blocking rod (73) is slidably arranged in the two grooves (72) together. A pulling plate (74) is fixedly arranged at one end of the blocking rod (73).
8. The dust-proof ball screw pair according to claim 1, characterized in that: The outer surface of the moving member (3) is in movable contact with the inner wall of the protection tube (1).