Large-lead ball screw pair with ball return device installed on screw

Abstract

The utility model discloses a large-lead ball screw pair with a ball return device installed on a lead screw, which comprises a ball screw, and the external thread of the ball screw is rotatably connected with a ball screw sleeve; and the cleaning assembly comprises a lantern ring, and the lantern ring is arranged in the ball screw sleeve in a clamped mode. In the daily use process, the ball screw sleeve can move left and right on the external thread of the ball screw by rotating the ball screw sleeve, when the ball screw sleeve moves left and right along the outside of the ball screw, the lantern ring synchronously moves left and right along the outside of the ball screw along with the ball screw sleeve, and finally, when the ball screw sleeve is adjusted, the ball screw sleeve can move left and right along the outside of the ball screw. And meanwhile, the brush cleans the exterior of the ball screw, the situation that dust is accumulated on the exterior of the ball screw, rotation of the ball screw sleeve is affected can be avoided, and the using stability of the whole device is improved.

Description

Technical Field

[0001] This utility model relates to the technical field of large-lead ball screw pairs, specifically a large-lead ball screw pair with a ball return device mounted on the screw. Background Technology

[0002] In some aerospace fields, linear actuators require limited space, lightweight operation, and high speeds. The ball screw pair, as the transmission element, is typically designed with the ball nut as a long sleeve nut. The thread raceway of the ball screw is shorter than that of the sleeve nut. When the sleeve nut is rotated, the ball screw can move back and forth along the inner raceway of the sleeve nut. This allows the entire linear actuator to be made smaller and lighter.

[0003] A large-lead ball screw pair with a ball return device mounted on a lead screw, disclosed in publication number CN220204570U, includes a ball nut with a single-start threaded raceway and a ball screw with a double-start threaded raceway. The first threaded raceway of the ball screw matches the threaded raceway on the ball nut and serves as the working threaded raceway. The groove depth of the second threaded raceway of the ball screw is greater than that of the first threaded raceway and serves as the ball return threaded raceway. A ball return device with an arc-shaped ball return raceway on its inner wall is installed at each end of the ball screw. The two ends of the arc-shaped ball return raceway on the first ball return device are respectively connected to the working threaded raceway and the ball return threaded raceway at one end of the ball screw, and the two ends of the arc-shaped ball return raceway on the second ball return device are respectively connected to the working threaded raceway and the ball return threaded raceway at the other end of the ball screw. This utility model features a compact structure, light weight, high reliability, high transmission efficiency, and fast transmission speed, making it suitable for large-lead ball screw assemblies. However, the aforementioned large-lead ball screw assemblies with the ball return device mounted on the screw have a relatively simple structure and lack a cleaning mechanism, making it easy for dust to accumulate on the outside of the ball screw. This causes the subsequent ball screw sleeve to be obstructed during rotation, affecting the overall stability of use. Therefore, it is necessary to provide a new large-lead ball screw assembly with the ball return device mounted on the screw to solve the above-mentioned technical problems. Utility Model Content

[0004] The purpose of this invention is to provide a large-lead ball screw pair with a ball return device mounted on a lead screw, which has the advantages of convenient cleaning and anti-clogging, and solves the problems in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a large-lead ball screw pair with a ball return device mounted on a lead screw, comprising: a ball screw, the external thread of which is rotatably connected to a ball sleeve; and a cleaning component, comprising a collar, the collar being engaged inside the ball sleeve. During daily use, rotating the ball sleeve allows it to move left and right along the external thread of the ball screw. When the ball sleeve moves left and right along the external thread of the ball screw, the collar moves simultaneously with the ball sleeve, thus simultaneously cleaning the external thread of the ball screw while adjusting the ball sleeve. This prevents dust accumulation on the external thread of the ball screw, which could affect the rotation of the ball sleeve and improve the overall stability of the device.

[0006] Preferably, the cleaning component further includes a fixing strip, which is uniformly fixed to the outside of the collar. By rotating the ball sleeve, it can be moved left and right along the external thread of the ball screw. When the ball sleeve moves left and right along the outside of the ball screw, the collar moves left and right along the outside of the ball screw in sync with the ball sleeve. Ultimately, when adjusting the ball sleeve, the brush cleans the outside of the ball screw simultaneously.

[0007] Preferably, the ball sleeve is uniformly fixedly connected with ribs on its outside. The ribs can increase friction and facilitate the rotation of the ball sleeve.

[0008] Preferably, a retaining ring is fixedly connected to the outside of the collar, and an annular groove is formed inside the ball sleeve. The retaining ring is engaged inside the annular groove, which facilitates the assembly and disassembly of the collar and the ball sleeve.

[0009] Preferably, the outer surface of the retaining ring is uniformly and fixedly connected with protrusions, which can improve the limiting effect and make the retaining ring stably limited inside the ring groove.

[0010] Preferably, mounting plates are fixedly connected to both ends of the ball screw, which can improve the stability of the overall device.

[0011] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0012] In daily use, this utility model allows the ball sleeve to move left and right along the external thread of the ball screw by rotating it. When the ball sleeve moves left and right along the external thread of the ball screw, the collar moves left and right synchronously along the external thread of the ball screw. Ultimately, when adjusting the ball sleeve, the brush simultaneously cleans the external thread of the ball screw, preventing dust accumulation on the external thread of the ball screw from affecting the rotation of the ball sleeve and improving the overall stability of the device. Attached Figure Description

[0013] Figure 1This is a schematic diagram of the external structure of the large-lead ball screw pair with the ball return device mounted on the lead screw according to this utility model.

[0014] Figure 2 This is a schematic diagram of the disassembly and assembly structure of a large-lead ball screw pair on a lead screw, where the ball return device of this utility model is installed.

[0015] Figure 3 This is a schematic diagram of the internal structure of a large-lead ball screw pair on which the ball return device of this utility model is installed;

[0016] Figure 4 This is a schematic diagram of the internal structure of the ball sleeve of a large-lead ball screw pair with the ball return device mounted on a lead screw.

[0017] In the diagram: 1. Ball screw; 2. Mounting plate; 3. Ball sleeve; 4. Rib; 5. Collar; 6. Fixing strip; 7. Brush; 8. Ring groove; 9. Protrusion; 10. Snap ring. Detailed Implementation

[0018] 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 protection scope of the present utility model.

[0019] Please see Figures 1 to 4 This utility model provides a technical solution: a large-lead ball screw pair with a ball return device mounted on a lead screw, including: a ball screw 1, with a ball sleeve 3 rotatably connected to the external thread of the ball screw 1; and a cleaning component, including a collar 5, which is locked inside the ball sleeve 3. During daily use, rotating the ball sleeve 3 allows it to move left and right along the external thread of the ball screw 1. When the ball sleeve 3 moves left and right along the external thread of the ball screw 1, the collar 5 moves left and right synchronously along the external thread of the ball screw 1. Ultimately, when adjusting the ball sleeve 3, the brush 7 simultaneously cleans the external thread of the ball screw 1, preventing dust accumulation on the external thread of the ball screw 1 from affecting the rotation of the ball sleeve 3 and improving the overall stability of the device.

[0020] The cleaning assembly also includes a fixing strip 6, which is uniformly fixed to the outside of the collar 5. By rotating the ball sleeve 3, it can be moved left and right on the external thread of the ball screw 1. When the ball sleeve 3 moves left and right along the outside of the ball screw 1, the collar 5 moves left and right along the outside of the ball screw 1 in sync with the ball sleeve 3. Finally, when adjusting the ball sleeve 3, the brush 7 cleans the outside of the ball screw 1 simultaneously.

[0021] The ball sleeve 3 is uniformly fixedly connected with ribs 4 on its outside. The ribs 4 can improve the friction and facilitate the rotation of the ball sleeve 3.

[0022] The collar 5 is externally fixedly connected with a retaining ring 10. The ball screw sleeve 3 has an annular groove 8 inside, and the retaining ring 10 is locked inside the annular groove 8, which facilitates the assembly and disassembly of the collar 5 and the ball screw sleeve 3.

[0023] The retaining ring 10 is uniformly fixedly connected with protrusions 9 on its outside. The protrusions 9 can improve the limiting effect, so that the retaining ring 10 is stably limited inside the ring groove 8.

[0024] Both ends of the ball screw 1 are fixedly connected to mounting plates 2, which can improve the stability of the overall device.

[0025] When the ball return device is installed on the lead screw, the large lead ball screw pair can be used. By rotating the ball sleeve 3, it can be moved left and right on the external thread of the ball screw 1. When the ball sleeve 3 moves left and right along the external thread of the ball screw 1, the collar 5 moves left and right along the external thread of the ball screw 1 in sync with the ball sleeve 3. Finally, when adjusting the ball sleeve 3, the brush 7 cleans the external thread of the ball screw 1 in sync.

[0026] The standard parts used in this embodiment can be purchased directly from the market, while the non-standard structural parts described in the specification and drawings can be processed without any doubt based on existing technical common sense. At the same time, the connection methods of each component adopt mature conventional methods in the existing technology, and the machinery, parts and equipment all adopt conventional models in the existing technology, so they will not be described in detail here.

[0027] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A large-lead ball screw pair with a ball return device mounted on a lead screw, characterized in that, include: A ball screw (1) is rotatably connected to a ball sleeve (3) via an external thread. The cleaning component includes a collar (5) which is engaged inside the ball thread sleeve (3).

2. The large-lead ball screw pair with the ball return device mounted on the lead screw according to claim 1, characterized in that: The cleaning assembly also includes a fixing strip (6), which is uniformly fixed to the outside of the collar (5), and a brush (7) is fixedly connected to the outside of the fixing strip (6).

3. The large-lead ball screw pair with the ball return device mounted on the lead screw according to claim 1, characterized in that: The ball thread sleeve (3) is uniformly fixedly connected with ribs (4) on its outside.

4. The large-lead ball screw pair with the ball return device mounted on the lead screw according to claim 1, characterized in that: The collar (5) is fixedly connected to the outside of a retaining ring (10), and the ball thread sleeve (3) has an annular groove (8) inside.

5. The large-lead ball screw pair with the ball return device mounted on the lead screw according to claim 4, characterized in that: The outer side of the retaining ring (10) is uniformly fixedly connected with protrusions (9).

6. The large-lead ball screw pair with the ball return device mounted on the lead screw according to claim 1, characterized in that: Mounting plates (2) are fixedly connected to both ends of the ball screw (1).

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