Miniature ball nut

Abstract

The utility model discloses a miniature ball nut, which comprises a nut body sleeved on an external lead screw. The thread groove is spirally formed along the inner wall of the nut body; the balls are arranged in the threaded grooves; the three backflow devices are evenly arranged around the nut body at intervals and evenly arranged in the length direction of the nut body at intervals. A backflow channel is arranged in the backflow device, and the balls flow back and circulate through the backflow channel. Friction can be reduced, transmission efficiency is improved, the service life is prolonged, the overall structural stability and rigidity of the nut are enhanced, and use stability is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of ball nuts, in particular to a miniature ball nut. Background Art

[0002] Ball screws are ideal for converting rotary motion into linear motion, or vice versa, offering high transmission efficiency and precise positioning. A ball screw consists of a screw shaft, a nut, and balls. As the screw shaft rotates, the balls roll between the two, achieving the desired linear or rotary motion. Miniature ball nuts provide stable linear motion within a very small space, achieving extremely high positioning accuracy and repeatability. However, compared to standard ball nuts, miniature ball nuts require higher rigidity and motion stability. Summary of the Invention

[0003] According to an embodiment of the present invention, a miniature ball nut is provided, comprising:

[0004] The nut body is sleeved on the external lead screw;

[0005] A thread groove is spirally arranged along the inner wall of the nut body;

[0006] A plurality of balls, wherein the plurality of balls are arranged in the thread groove;

[0007] Three returners are evenly spaced around the nut body and evenly spaced along the length of the nut body;

[0008] A reflux channel is provided in the reflux device, and a plurality of balls reflux and circulate through the reflux channel.

[0009] Furthermore, three mounting holes are provided on the nut body, and three reflux devices are installed in the three mounting holes respectively.

[0010] Furthermore, the reflux channel is S-shaped, and both ends of the reflux channel are respectively connected to adjacent thread grooves.

[0011] Furthermore, the return flow device is waist-shaped.

[0012] Furthermore, the material of the nut body is bearing steel.

[0013] Furthermore, the three refluxes are divided into a first refluxe, a second refluxe and a third refluxe. The first refluxe and the third refluxe are respectively close to the two ends of the nut body, and the second refluxe is located between the first refluxe and the third refluxe.

[0014] Furthermore, the nut body is a cylinder.

[0015] Furthermore, a chrome plating layer is provided on the surface of the nut body.

[0016] The micro ball nut according to the embodiment of the utility model can reduce friction, improve transmission efficiency and service life, enhance the overall structural stability and rigidity of the nut, and improve the stability in use.

[0017] It is to be understood that both the foregoing general description and the following detailed description are exemplary, and are intended to provide further explanation of the technology as claimed. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 Schematic diagram of the assembly of a miniature ball nut according to an embodiment of the present utility model;

[0019] Figure 2 This is a schematic structural diagram of a miniature ball nut according to an embodiment of the present utility model;

[0020] Figure 3 Schematic cross-sectional view of a miniature ball nut according to an embodiment of the present utility model;

[0021] Figure 4 Schematic diagram of a reflux device of a miniature ball nut according to an embodiment of the present utility model. DETAILED DESCRIPTION

[0022] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings to further illustrate the present invention.

[0023] First, combine Figures 1 to 4 The miniature ball nut according to the embodiment of the present invention is described and used for a ball screw, which has a wide range of application scenarios.

[0024] like Figures 1 to 4 As shown, the micro ball nut of the embodiment of the present invention includes: a nut body 1, a thread groove 2, a plurality of balls 3 and three returners 4.

[0025] Specifically, if Figures 1 to 4 As shown, in this embodiment, the nut body 1 is sleeved on the external lead screw 5, and the two cooperate to perform precise mechanical transmission. The nut body 1 is a cylinder;

[0026] The thread groove 2 is spirally arranged along the inner wall of the nut body 1 to provide a rolling path for the balls 3 to achieve relative movement between the screw 5 and the nut body 1;

[0027] Several balls 3 are arranged in the thread groove 2, which convert the original sliding friction into rolling friction, greatly reducing the friction coefficient and improving the transmission efficiency;

[0028] The three reflux devices 4 are evenly spaced around the nut body 1 and are evenly spaced along the length direction of the nut body 1, that is, the three reflux devices 4 are evenly spaced along the axial and radial directions of the nut body 1, which helps to enhance the overall structural stability of the nut and improve the stability in use; a reflux channel 6 is provided in the reflux device 4, and a number of balls 3 reflux through the reflux channel 6. The reflux channel 6 is S-shaped, and the smooth circulation path helps to reduce the friction and wear between the balls 3 and the reflux device 4. The two ends of the reflux channel 6 are respectively connected to the adjacent thread grooves 2, and are bent and evenly in a three-dimensional S shape. The reflux path design is divided into three columns, and the ball 3 can obtain a speed-soothing effect in the reflux section, which helps to reduce the friction between the ball 3 and the nut, thereby reducing wear and extending the service life; the three reflux channels 6 disperse the ball 3 to different paths, avoiding local wear and overheating caused by the concentration of the ball 3, ensuring the stability of the circulation path of the ball 3, and helping to improve the accuracy and reliability of the transmission; each reflux device 4 shares a part of the circulation task of the ball 3, making the load of the entire nut body 1 more uniform and extending the service life. The reflux device 4 adopts a waist-shaped reflux device 4.

[0029] Further, if Figures 1 to 4 As shown, in this embodiment, three mounting holes are opened on the nut body 1, and three returners 4 are respectively installed in the three mounting holes, which makes it easier to inspect and replace the returners 4 and reduces the manufacturing difficulty and cost.

[0030] Further, if Figures 1 to 4 As shown, in this embodiment, the nut body 1 is made of stainless steel, preferably bearing steel, which has high strength and good stability.

[0031] Further, if Figures 1 to 4 As shown, in this embodiment, the three refluxes 4 are divided into a first reflux 41, a second reflux 42 and a third reflux 43. The first reflux 41 and the third reflux 43 are respectively close to the two ends of the nut body 1 to further improve stability. The second reflux 42 is located between the first reflux 41 and the third reflux 43.

[0032] Further, if Figures 1 to 4 As shown, in this embodiment, the surface of the nut body 1 is provided with a chrome plating layer to improve corrosion resistance and enhance hardness and wear resistance.

[0033] Working principle: When the screw 5 rotates, the balls 3 roll in the thread groove 2, pushing the nut body 1 to move along the axis of the screw 5. The balls 3 form a continuous cycle in the closed loop through the waist-shaped return flow device 4.

[0034] Above, refer to Figures 1 to 4The present invention discloses a miniature ball nut, which can reduce friction, improve transmission efficiency and service life, enhance the overall structural stability and rigidity of the nut, and improve the stability in use.

[0035] It should be noted that, in this specification, the terms "comprises," "includes," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a process, method, article, or apparatus comprising a series of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus. In the absence of further limitations, the elements defined by the phrase "comprising..." do not exclude the presence of other identical elements in the process, method, article, or apparatus comprising the elements.

[0036] Although the present invention has been described in detail through the above preferred embodiments, it should be understood that the above description should not be considered as limiting the present invention. After reading the above description, various modifications and alternatives to the present invention will be readily apparent to those skilled in the art. Therefore, the scope of protection of the present invention shall be defined by the appended claims.

Claims

1. A miniature ball nut, characterized in that: Include: A nut body, wherein the nut body is sleeved on the external lead screw; a thread groove, the thread groove being spirally arranged along the inner wall of the nut body; a plurality of balls, wherein the plurality of balls are arranged in the thread groove; three refluxes, the three refluxes being evenly spaced around the nut body and evenly spaced along the length of the nut body; A reflux channel is provided in the reflux device, and the plurality of balls reflux and circulate through the reflux channel.

2. The miniature ball nut according to claim 1, characterized in that: The nut body is provided with three mounting holes, and the three reflux devices are mounted in the three mounting holes respectively.

3. The miniature ball nut according to claim 1, characterized in that: The reflux channel is S-shaped, and both ends of the reflux channel are respectively connected to adjacent thread grooves.

4. The miniature ball nut according to claim 1, wherein: The reflux device is waist-shaped.

5. The miniature ball nut according to claim 1, wherein: The material of the nut body is bearing steel.

6. The miniature ball nut according to claim 1, wherein: The three refluxes are divided into a first reflux, a second reflux and a third reflux. The first reflux and the third reflux are respectively close to the two ends of the nut body, and the second reflux is located between the first reflux and the third reflux.

7. The miniature ball nut according to claim 1, characterized in that: The nut body is a cylinder.

8. The miniature ball nut according to claim 1, wherein: The surface of the nut body is provided with a chrome plating layer.

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