High-precision dustproof ball screw

Abstract

The utility model belongs to the technical field of screw rod, concretely is a kind of high-precision dustproof ball screw, including screw rod body and the ball nut of sleeve joint on its outer wall, the inner top of ball nut is equipped with the sliding slot that is penetrated upwards, the upper end of ball nut is equipped with the recess that is communicated with sliding slot, the inner bottom of recess is slidably placed with support block, the upper end of support block is inserted with second locking screw, support block is fixed with the inner bottom of recess by second locking screw, the inner side wall of sliding slot is slidably connected with sliding block, the lower end of sliding block is fixedly connected with rubber block, the lower end of rubber block is penetrated sliding slot, the upper end of sliding block is vertically inserted with adjusting rod, and it is screw connection between adjusting rod and sliding block.The utility model not only can remove dust and impurity on the surface of screw rod track, guarantee ball normal rolling, support adjustment and disassembly maintenance simultaneously, significantly improve the easy use and practicality of structure.

Description

Technical Field

[0001] This utility model relates to the field of ball screw technology, and in particular to a high-precision dustproof ball screw. Background Technology

[0002] A ball screw is a high-efficiency transmission component that converts rotary motion into linear motion. It consists of a screw, a nut, and circulating balls. Its core principle is to replace traditional sliding friction with rolling friction between the balls in the screw thread grooves and the nut raceways, significantly reducing transmission resistance (friction coefficient only 0.003-0.008) and achieving high-precision (repeatability ±0.005mm) and high-efficiency (transmission efficiency 90%-98%) linear displacement control. It is widely used in CNC machine tools, 3D printers, automation equipment, and other fields requiring precise positioning, and also features high rigidity, long lifespan (lifespan more than 10 times that of sliding screws), and high-speed operation (speed up to 6000rpm).

[0003] Because the ball screw has a helical track on its outer surface for the balls to roll, dust can easily enter the track during operation. This hinders the normal rolling of the balls, increases friction and wear between the screw and the nut, and consequently reduces transmission accuracy and service life. Utility Model Content

[0004] The purpose of this invention is to solve the problems mentioned in the background art and to provide a high-precision dustproof ball screw.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A high-precision dustproof ball screw includes a screw body and a ball nut sleeved on its outer wall. The inner top of the ball nut has an upward-through groove, and the upper end of the ball nut has a groove communicating with the groove. A support block is slidably placed in the inner bottom of the groove. A second locking screw is inserted into the upper end of the support block, and the support block is fixed to the inner bottom of the groove by the second locking screw. A slider is slidably connected to the inner side wall of the groove. A rubber block is fixedly connected to the lower end of the slider, and the lower end of the rubber block passes through the groove. An adjusting rod is vertically inserted into the upper end of the slider. The adjusting rod and the slider are threaded together. The upper end of the adjusting rod passes through the groove and the support block and is fixedly connected to a knob. The adjusting rod and the support block are rotatably connected.

[0007] Preferably, each end of the ball nut is provided with a support ring, a rubber ring is fixedly connected to the inner side wall of the support ring, and a first locking screw is inserted into the side of the support ring away from the ball nut, and the support ring is fixed to the ball nut by the first locking screw.

[0008] Preferably, a vertically arranged guide rod is slidably inserted into the upper end of the slider, and the upper end of the guide rod passes through the slide groove and is fixedly connected to the lower end of the support block.

[0009] Preferably, a third locking screw is inserted at the upper end of the knob near the edge, the third locking screw is threaded to the knob, the lower end of the third locking screw passes through the knob, and the upper end of the support block has a plurality of slots corresponding to the third locking screw in a ring.

[0010] Preferably, the upper end of the adjusting rod is rotatably sleeved with a support cylinder, and the upper end of the support cylinder is fixedly connected to the lower end of the support block.

[0011] Preferably, anti-slip stripes are fixedly connected to the outer wall of the knob.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] 1. This utility model, by setting up a dust removal mechanism composed of a rubber block, a slider, an adjusting rod and a knob, can not only remove dust and impurities from the surface of the lead screw track, avoiding the ball bearings from experiencing a decline in lifespan and precision due to contamination, but also compensate for the wear of the rubber block through the cooperation of the adjusting rod and the knob, maintaining the cleaning depth, and significantly improving the adaptability, durability and adjustability of the structure.

[0014] 2. This utility model uses a second locking screw and a support block to form a disassembly and assembly module, which allows users to easily remove the rubber block for maintenance and replacement; at the same time, through the coordinated design of the rubber ring, support ring and the first locking screw, it can reduce the intrusion of external dust into the ball nut and realize modular quick disassembly and assembly, which significantly enhances the ease of maintenance and practicality.

[0015] 3. This utility model can not only remove dust and impurities from the surface of the lead screw track and ensure the normal rolling of the balls, but also supports adjustment and disassembly and maintenance, significantly improving the ease of use and practicality of the structure. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of a high-precision dustproof ball screw proposed in this utility model;

[0017] Figure 2 This is a schematic diagram of the structure at point A of a high-precision dustproof ball screw proposed in this utility model;

[0018] Figure 3 This is a partial top view of the support block structure of a high-precision dustproof ball screw proposed in this utility model.

[0019] In the diagram: 1-lead screw body, 2-ball nut, 3-support ring, 4-first locking screw, 5-rubber ring, 6-slider, 7-rubber block, 8-guide rod, 9-adjusting rod, 10-support cylinder, 11-knob, 12-support block, 13-second locking screw. Detailed Implementation

[0020] 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.

[0021] Reference Figure 1-3 A high-precision dustproof ball screw includes a screw body 1 and a ball nut 2 sleeved on its outer wall. Both ends of the ball nut 2 are provided with support rings 3 for supporting rubber rings 5. The inner side wall of the support ring 3 is fixedly connected with rubber rings 5 ​​for dustproof function. A first locking screw 4 is inserted on the side of the support ring 3 away from the ball nut 2 for fixing the support ring 3. The support ring 3 is fixed to the ball nut 2 by the first locking screw 4.

[0022] In this embodiment, the inner top of the ball nut 2 is provided with an upward through groove, the upper end of the ball nut 2 is provided with a groove communicating with the groove, a support block 12 is slidably placed in the inner bottom of the groove to support the adjusting rod 9, a second locking screw 13 is inserted into the upper end of the support block 12 to fix the support block 12, the support block 12 is fixed to the inner bottom of the groove by the second locking screw 13, a slider 6 is slidably connected to the inner side wall of the groove to drive the rubber block 7 to move, the lower end of the slider 6 is fixedly connected to the rubber block 7 to clean the dust and impurities in the track on the surface of the lead screw body 1, and the lower end of the rubber block 7 passes through the groove.

[0023] In this embodiment, a vertically arranged guide rod 8 is slidably inserted into the upper end of the slider 6 to guide the slider 6. The upper end of the guide rod 8 passes through the slide groove and is fixedly connected to the lower end of the support block 12. An adjusting rod 9 is vertically inserted into the upper end of the slider 6 to drive the slider 6 to move. The adjusting rod 9 and the slider 6 are connected by a thread. A support cylinder 10 is rotatably sleeved on the upper end of the adjusting rod 9 to support the adjusting rod 9. The upper end of the support cylinder 10 is fixedly connected to the lower end of the support block 12.

[0024] In this embodiment, the upper end of the adjusting rod 6 passes through the slide groove and the support block 12 and is fixedly connected to a knob 11, which is used to drive the adjusting rod 6 to rotate. The adjusting rod 6 and the support block 12 are rotatably connected. Anti-slip stripes are fixedly connected to the outer wall of the knob 11 to prevent slipping when manually rotating. A third locking screw is inserted at the upper end of the knob 11 and near the edge to cooperate with the slot to prevent the knob 11 from loosening. The third locking screw is screwed into the slot. The third locking screw and the knob 11 are threadedly connected. The lower end of the third locking screw passes through the knob 11. The upper end of the support block 12 has multiple slots in a ring shape corresponding to the third locking screw.

[0025] In this embodiment, during operation, when the lead screw body 1 rotates to drive the ball nut 2 to move, the built-in rubber block 7 can scrape off the dust and impurities adhering to the track surface of the lead screw body 1, preventing contaminants from affecting the operation of the ball. When the rubber block 7 experiences a decrease in fit due to long-term wear, the knob 11 is manually rotated to drive the adjusting rod 9 to rotate. Through the threaded engagement, the slider 6 is pushed down, causing the rubber block 7 to move down synchronously, making it fit tightly against the inner wall of the track again, restoring its cleaning efficiency. During maintenance, the second locking screw 13 is unscrewed to unlock the support block 12. The support block 12 can be pulled out of the groove to remove the adjusting rod 9, slider 6, and rubber block 7 assembly. At the same time, the dustproof structure formed by the support ring 3 and the rubber ring 5 can reduce the intrusion of external dust into the ball nut 2, improving its protective performance. When the rubber ring 5 needs to be replaced, only the first locking screw 4 needs to be unscrewed for quick disassembly and maintenance.

[0026] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A high-precision dustproof ball screw, comprising a screw body (1) and a ball nut (2) sleeved on its outer wall, characterized in that: The inner top of the ball nut (2) is provided with an upward through groove, and the upper end of the ball nut (2) is provided with a groove communicating with the groove. A support block (12) is slidably placed in the inner bottom of the groove. A second locking screw (13) is inserted into the upper end of the support block (12). The support block (12) is fixed to the inner bottom of the groove by the second locking screw (13). A slider (6) is slidably connected to the inner side wall of the groove. A rubber block (7) is fixedly connected to the lower end of the slider (6). The lower end of the rubber block (7) passes through the groove. An adjusting rod (9) is vertically inserted into the upper end of the slider (6). The adjusting rod (9) and the slider (6) are connected by a thread. The upper end of the adjusting rod passes through the groove and the support block (12) and is fixedly connected to a knob (11). The adjusting rod and the support block (12) are rotatably connected.

2. The high-precision dustproof ball screw according to claim 1, characterized in that: Both ends of the ball nut (2) are provided with support rings (3). A rubber ring (5) is fixedly connected to the inner side wall of the support ring (3). A first locking screw (4) is inserted on the side of the support ring (3) away from the ball nut (2). The support ring (3) is fixed to the ball nut (2) by the first locking screw (4).

3. The high-precision dustproof ball screw according to claim 1, characterized in that: The upper end of the slider (6) is slidably inserted with a vertically arranged guide rod (8), the upper end of the guide rod (8) passes through the slide groove and is fixedly connected to the lower end of the support block (12).

4. The high-precision dustproof ball screw according to claim 1, characterized in that: A third locking screw is inserted at the upper end of the knob (11) and near the edge. The third locking screw is threadedly connected to the knob (11). The lower end of the third locking screw passes through the knob (11). The upper end of the support block (12) has multiple slots in a ring shape corresponding to the third locking screw.

5. A high-precision dustproof ball screw according to claim 1, characterized in that: The upper end of the adjusting rod (9) is rotatably sleeved with a support cylinder (10), and the upper end of the support cylinder (10) is fixedly connected to the lower end of the support block (12).

6. A high-precision dustproof ball screw according to claim 1, characterized in that: Anti-slip stripes are fixedly connected to the outer wall of the knob (11).

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