Multi-head ball screw assembly

Abstract

The utility model discloses a multi-head ball screw pair which comprises a ball screw, the outer side of the ball screw is sleeved with two sets of spliced ball screw sleeves, the left end and the right end of the ball screw are both provided with limiting rings, the left sides of the two sets of ball screw sleeves are both provided with opposite cleaning assemblies, and through the elastic effect of a supporting spring, the cleaning assemblies are arranged on the left sides of the ball screw sleeves. The cleaning block can be tightly attached to the surface of the ball screw, dust, chippings and other impurities on the surface are automatically removed along with circulating movement of balls, the manual cleaning frequency is reduced through the design, the automation degree of equipment is improved, the dust, chippings and other impurities are effectively prevented from entering the position between the ball screw sleeve and the ball screw through the cleaning block, and the service life of the equipment is prolonged. Therefore, the possibility of abrasion and faults is reduced, the service life of the ball screw is prolonged, and the transmission efficiency and precision of the ball screw are kept.

Description

Technical Field

[0001] This utility model relates to the field of ball screw pair technology, specifically multi-start ball screw pairs. Background Technology

[0002] Ball screws are the most commonly used transmission components in machine tools and precision machinery, used to convert rotary motion into linear motion, or vice versa. The rapid development of the automotive industry, especially the rapid advancement of new energy vehicles and autonomous vehicles, has placed increasingly higher demands on the precision and manufacturing of ball screws. Current ball screw assemblies mainly consist of a screw, nut, steel balls, and a circulator. The structure of the circulator increases the manufacturing difficulty of the nut and also makes the assembly of the steel balls, circulator, and nut more inconvenient.

[0003] This invention, disclosed in publication number CN117704019A, discloses a multi-start ball screw assembly, comprising at least two threaded grooves with different raceway radii on the circumferential surface of the screw; a nut having mating grooves on its inner wall, the number of which, the lead, and the raceway radius are all equal to and corresponding to the threaded grooves; matching balls are arranged in the threaded grooves and their corresponding mating grooves; and a number of return channels on the nut equal to the number of threaded grooves, the diameter of which corresponds to the diameter of the balls. Adjacent threaded grooves of different specifications are connected by... Shoulders are provided between the two adjacent mating grooves of different specifications. The beneficial effects of this invention are low friction loss and high transmission efficiency. It can not only effectively utilize the surface of the screw, but also has sufficient spacing between different raceways to prevent plastic deformation caused by compression between the balls and the raceways, thus ensuring load-bearing stability. However, the above-mentioned ball screw pair structure is relatively simple and cannot effectively seal the ball sleeve, nor can it clean the ball screw. This may cause dust to stick to the ball screw or enter the ball sleeve, affecting the performance. Therefore, we propose a multi-start ball screw pair. Utility Model Content

[0004] The purpose of this invention is to provide a multi-start ball screw assembly to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a multi-start ball screw assembly, including a ball screw:

[0006] The ball screw is fitted with two sets of spliced ​​ball sleeves on its outer side. Limiting rings are provided at both ends of the ball screw. Each set of ball sleeves has a corresponding cleaning component on its left side.

[0007] Preferably, both sets of ball screw sleeves are provided with positioning plates on their upper surfaces, and two sets of fixing bolts are inserted on the left side of the two sets of positioning plates to facilitate the installation of the two sets of ball screw sleeves.

[0008] Preferably, the two sets of limiting rings are movably sleeved on the left and right ends of the ball screw, and each set of limiting rings is provided with a positioning bolt at the upper end to facilitate adjustment of the range of motion of the ball screw sleeve.

[0009] Preferably, both sets of cleaning components include a mounting plate, which is fixedly installed on the left side of the ball screw sleeve. A support spring is installed on the upper end of the mounting plate, and a cleaning block is installed on the upper end of the support spring to facilitate cleaning of the ball screw.

[0010] Preferably, the two sets of ball screw sleeves are provided with multiple sets of first balls, and the outer surface of the ball screw and the inside of the two sets of ball screw sleeves are provided with matching spiral structure grooves. Furthermore, the lower sides of both ends of the spiral structure grooves inside the two sets of ball screw sleeves are provided with conveying grooves to facilitate the movement of the ball screw sleeves.

[0011] Preferably, the two sets of ball screw sleeves are provided with multiple sets of second balls, and the outer surface of the ball screw and the inside of the two sets of ball screw sleeves are provided with matching spiral structure grooves. Furthermore, the lower sides of the spiral structure grooves inside the two sets of ball screw sleeves are provided with conveying grooves to facilitate the movement of the ball screw sleeves.

[0012] Preferably, the size of the first ball in multiple sets is larger than that of the second ball, which enhances the performance of the ball thread sleeve.

[0013] Preferably, sealing rings are provided at both the left and right ends of the two sets of ball screw sleeves to prevent dust from entering the ball screw sleeves.

[0014] This utility model has at least the following beneficial effects:

[0015] By incorporating a cleaning component, the cleaning block adheres closely to the surface of the ball screw through the elastic action of the support spring. As the balls circulate, it automatically removes dust, debris, and other impurities from the surface. This design reduces the frequency of manual cleaning and increases the automation level of the equipment. The presence of the cleaning block effectively prevents dust, debris, and other impurities from entering between the ball sleeve and the ball screw, thereby reducing the possibility of wear and failure. This helps extend the service life of the ball screw and maintain its transmission efficiency and accuracy.

[0016] By incorporating a sealing ring, dust, impurities, and moisture can be effectively prevented from entering the ball screw assembly, protecting the cleanliness of the balls and screw, extending their service life. The sealing ring also helps maintain the internal lubricant, preventing its loss, thereby reducing friction and wear and improving transmission efficiency. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this utility model;

[0018] Figure 2This is a schematic diagram of the disassembled structure of this utility model;

[0019] Figure 3 This is a schematic diagram of the disassembly structure of the ball screw of this utility model;

[0020] Figure 4 This is a schematic diagram of the disassembly structure of the ball screw sleeve of this utility model;

[0021] Figure 5 This is a schematic diagram of the ball screw sleeve structure of this utility model.

[0022] In the diagram: 1. Ball screw; 2. Ball sleeve; 3. Positioning plate; 4. Fixing bolt; 5. Limiting ring; 6. Positioning bolt; 7. Mounting plate; 8. Support spring; 9. Cleaning block; 10. First ball; 11. Second ball; 12. Sealing ring. Detailed Implementation

[0023] 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.

[0024] Please see Figure 1-5 This utility model provides a technical solution: a multi-start ball screw assembly, including a ball screw 1:

[0025] Two sets of ball screw sleeves 2 are fitted on the outer side of the ball screw 1. Limiting rings 5 ​​are provided at both ends of the ball screw 1. Cleaning components are provided on the left side of both sets of ball screw sleeves 2.

[0026] Both sets of ball screw sleeves 2 are provided with positioning plates 3 on their upper surfaces, and two sets of fixing bolts 4 are inserted on the left side of the two sets of positioning plates 3. The combined design of positioning plates 3 and fixing bolts 4 can effectively prevent the ball screw sleeves 2 from shifting or rotating during operation, thereby improving the stability of the entire ball screw pair. This is especially important for applications that require high-precision transmission. Through the fixing effect of positioning plates 3 and fixing bolts 4, the overall rigidity of the ball screw pair can be enhanced, and deformation caused by vibration or external impact can be reduced, thereby maintaining transmission accuracy.

[0027] Two sets of limiting rings 5 ​​are movably sleeved on the left and right ends of the ball screw 1, and each set of limiting rings 5 ​​is provided with a positioning bolt 6 at the upper end. The movement range of the ball screw sleeve 2 can be limited by adjusting the position of the limiting rings 5, and the position of the limiting rings 5 ​​can be fixed by the positioning bolt 6.

[0028] Both sets of cleaning components include a mounting plate 7, which is fixedly installed on the left side of the ball screw sleeve 2. A support spring 8 is installed on the upper end of the mounting plate 7, and a cleaning block 9 is installed on the upper end of the support spring 8. Through the elastic action of the support spring 8, the cleaning block 9 can be in close contact with the surface of the ball screw 1. As the ball moves in a cycle, it automatically removes dust, debris and other impurities from the surface. This design reduces the frequency of manual cleaning and improves the automation level of the equipment.

[0029] The two sets of ball screw sleeves 2 are equipped with multiple sets of first balls 10 inside. Matching helical grooves are formed on the outer surface of the ball screw 1 and inside the two sets of ball screw sleeves 2. Conveying grooves are provided at the lower ends of the helical grooves inside the two sets of ball screw sleeves 2. The rolling of the first balls 10 within the helical grooves significantly reduces frictional resistance, thereby improving transmission efficiency. This design enables the multi-start ball screw pair to perform excellently in high-speed, high-precision transmission. The multiple sets of first balls 10 are evenly distributed in the helical grooves, which can more evenly distribute the load, reduce the force on individual balls, and thus extend the service life of the balls.

[0030] The two sets of ball screw sleeves 2 are equipped with multiple sets of second balls 11 inside. Matching helical grooves are formed on the outer surface of the ball screw 1 and inside the two sets of ball screw sleeves 2. Conveying grooves are provided at the lower ends of the helical grooves inside the two sets of ball screw sleeves 2. The rolling of the second balls 11 within the helical grooves significantly reduces frictional resistance, thereby improving transmission efficiency. This design enables the multi-start ball screw pair to perform excellently in high-speed, high-precision transmission. The multiple sets of second balls 11, evenly distributed within the helical grooves, can more evenly distribute the load, reducing the force on individual balls and extending their service life.

[0031] The first ball 10 is larger than the second ball 11. By setting different sized balls in the ball sleeve 2, the contact state between the first ball 10 and the second ball 11 and the ball screw can be optimized, thereby reducing frictional resistance and improving transmission efficiency. The larger first ball 10 can provide more stable support, which helps to reduce vibration and noise, especially at high speeds. The larger first ball 10 can withstand greater loads, thereby improving the overall load capacity of the ball screw pair.

[0032] Both sets of ball screw sleeves 2 are equipped with sealing rings 12 at their left and right ends. The sealing rings 12 can effectively prevent dust, impurities and moisture from entering the ball screw assembly, protect the cleanliness of the balls and screw, and extend their service life.

[0033] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0034] 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 multi-start ball screw assembly, characterized in that, Including ball screw (1): The ball screw (1) is fitted with two sets of ball sleeves (2) that are spliced ​​together. Limiting rings (5) are provided at both ends of the ball screw (1). Each set of ball sleeves (2) has a corresponding cleaning component on its left side.

2. The multi-start ball screw assembly according to claim 1, characterized in that: Both sets of ball screw sleeves (2) are provided with positioning plates (3) on their upper surfaces, and two sets of fixing bolts (4) are inserted on the left side of the two sets of positioning plates (3).

3. The multi-start ball screw assembly according to claim 1, characterized in that: The two sets of limiting rings (5) are movably sleeved on the left and right ends of the ball screw (1), and the upper ends of the two sets of limiting rings (5) are provided with positioning bolts (6).

4. The multi-start ball screw assembly according to claim 1, characterized in that: Both sets of cleaning components include a mounting plate (7), which is fixedly mounted on the left side of the ball thread sleeve (2), and a support spring (8) is mounted on the upper end of the mounting plate (7), and a cleaning block (9) is mounted on the upper end of the support spring (8).

5. The multi-start ball screw assembly according to claim 1, characterized in that: The two sets of ball screw sleeves (2) are provided with multiple sets of first balls (10), and the outer surface of the ball screw (1) and the inside of the two sets of ball screw sleeves (2) are provided with matching spiral structure grooves, and the lower sides of the spiral structure grooves inside the two sets of ball screw sleeves (2) are provided with conveying grooves.

6. The multi-start ball screw assembly according to claim 1, characterized in that: The two sets of ball screw sleeves (2) are provided with multiple sets of second balls (11), and the outer surface of the ball screw (1) and the inside of the two sets of ball screw sleeves (2) are provided with matching spiral structure grooves, and the lower sides of the spiral structure grooves inside the two sets of ball screw sleeves (2) are provided with conveying grooves.

7. The multi-start ball screw assembly according to claim 5, characterized in that: The size of the first ball (10) in multiple sets is larger than that of the second ball (11).

8. The multi-start ball screw assembly according to claim 1, characterized in that: Both sets of ball thread sleeves (2) are equipped with sealing rings (12) at their left and right ends.

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