Ball screw with splicing structure

Abstract

The ball screw with the splicing structure comprises a first screw rod, the bottom end of the first screw rod is fixedly connected with an inserting rod, the left side and the right side of the inserting rod are fixedly connected with positioning blocks, the left side and the right side of the inserting rod are provided with mounting grooves, the inner walls of the mounting grooves are fixedly connected with connecting springs, and the connecting springs are fixedly connected with the connecting springs. The sides, away from the mounting grooves, of the connecting springs are fixedly connected with limiting balls. The first lead screw is inserted into the inserting groove of the second lead screw through the inserting rod, rapid positioning is achieved through sliding of the positioning block in the sliding groove, after the first lead screw moves by a certain distance, the limiting ball extrudes the connecting spring inwards and slides into the mounting groove, the first lead screw continues to be moved, the positioning block moves into the positioning groove, the first lead screw is rotated, and then the second lead screw is fixed. And the limiting balls are clamped in the limiting grooves, the stability degree of the limiting balls is guaranteed through the elastic force of the connecting springs, and therefore splicing of the two lead screws is completed.

Description

Technical Field

[0001] The utility model relates to the technical field of ball screws, in particular to a ball screw with a splicing structure. Background Art

[0002] Ball screws are the most commonly used transmission components in tool and precision machinery. Their primary function is to convert rotational motion into linear motion or torque into repetitive axial force, while offering high precision, reversibility, and efficiency. Due to their minimal frictional resistance, ball screws are widely used in a variety of industrial equipment and precision instruments.

[0003] The ball screw mainly consists of three parts: threaded shaft, nut and ball. During the manufacturing process of machine tools, due to its large size, in order to match the stroke of the machine tool, the length of the ball screw is generally longer. However, when the screw is processed, its long length increases the difficulty of production and processing, and it is more inconvenient to transport. Utility Model Content

[0004] The purpose of the present utility model is to provide a ball screw with a spliced ​​structure to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solution: a ball screw with a splicing structure, comprising a first screw rod, the bottom end of the first screw rod is fixedly connected to a plug rod, the left and right sides of the plug rod are fixedly connected to positioning blocks, the left and right sides of the plug rod are provided with mounting grooves, the inner wall of the mounting groove is fixedly connected to a connecting spring, the side of the connecting spring away from the mounting groove is fixedly connected to a limiting ball, the side of the plug rod away from the first screw rod is slidably connected to a second screw rod, the top of the second screw rod is provided with a plug groove, the inner wall of the plug groove is provided with a positioning groove, the inner wall of the plug groove is provided with a sliding groove, and the inner wall of the plug groove is provided with a limiting groove.

[0006] As a further preferred embodiment of the present technical solution, the positioning block is located inside the positioning groove, the limiting ball is located inside the mounting groove, the limiting ball and the limiting groove are adapted to each other, the surfaces of the second screw rod and the first screw rod are both provided with external threads, and the positioning groove adopts an arc-shaped structure.

[0007] As a further preferred embodiment of the present technical solution, a nut moving sleeve is provided on the surface of the second screw rod, an internal thread is provided on the inner wall of the nut moving sleeve, a sliding ball is provided inside the internal thread, a first limit baffle is provided inside the nut moving sleeve, and a first bolt is threadedly connected to the left and right sides of the first limit baffle.

[0008] As a further preferred embodiment of the present technical solution, the internal thread and the external thread form a sliding channel, the sliding ball is located inside the sliding channel, the first limiting baffle adopts an annular structure, and the first bolt and the nut moving sleeve are threadedly connected.

[0009] As a further preferred embodiment of the present technical solution, the nut movable sleeve is fixedly connected to a movable sleeve fixing plate on one side close to the first screw rod, a second limiting baffle is provided inside the movable sleeve fixing plate, and second bolts are threadedly connected to the left and right sides of the second limiting baffle.

[0010] As a further preferred embodiment of the present technical solution, a plug-in hole is provided on the top of the nut moving sleeve, a circulator is provided inside the plug-in hole, a positioning plate is provided on the top of the circulator, and a fastening bolt is threadedly connected to the middle of the positioning plate.

[0011] As a further preferred embodiment of the present technical solution, there are four plug-in holes, the circulator adopts a U-shaped structure, there are two positioning plates, and the bottom ends of the two positioning plates are in contact with the nut moving sleeve.

[0012] The utility model provides a ball screw with a spliced ​​structure, which has the following beneficial effects:

[0013] (1) The utility model inserts the first screw into the plug-in slot of the second screw through the plug-in rod, and realizes rapid positioning by sliding the positioning block in the slide slot. After moving a certain distance, the limiting ball presses the connecting spring inward and slides into the installation slot. The first screw is continued to be moved to move the positioning block into the positioning slot. The first screw is rotated 90 degrees. The limiting ball is clamped in the inside of the limiting slot and its stability is guaranteed by the elastic force of the connecting spring, thereby completing the splicing of the two screws.

[0014] (2) The utility model improves the smoothness of the movement of the ball screw by enabling the nut moving sleeve to slide on the surface of the ball screw when the ball screw is working, and the sliding ball moves in the sliding channel formed by the ball screw and the nut moving sleeve, and ensures the circulation of the sliding ball through the circulator, so that the sliding ball always slides in the nut moving sleeve. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the structure of the utility model;

[0016] Figure 2 This is a schematic diagram of the cross-sectional structure of the first screw rod of the present invention;

[0017] Figure 3 This is a schematic diagram of the cross-sectional structure of the second screw rod of the present invention;

[0018] Figure 4 This is a structural diagram of the nut moving sleeve and the moving sleeve fixing plate of the utility model;

[0019] Figure 5 This is a schematic diagram of the second limit baffle structure of the present utility model.

[0020] In the figure: 1. First screw rod; 2. Connecting rod; 3. Positioning block; 4. Mounting slot; 5. Connecting spring; 6. Limiting ball; 7. Second screw rod; 8. Connecting slot; 9. Positioning slot; 10. Slide slot; 11. Limiting slot; 12. Nut moving sleeve; 13. Internal thread; 14. Sliding ball; 15. First limiting baffle; 16. First bolt; 17. Moving sleeve fixing plate; 18. Second limiting baffle; 19. Second bolt; 20. Connecting hole; 21. Circulator; 22. Positioning plate; 23. Fastening bolt. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present invention will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the present invention.

[0022] The utility model provides a technical solution: Figure 1 and Figure 5 As shown, in this embodiment, a ball screw with a splicing structure includes a first screw rod 1, the bottom end of the first screw rod 1 is fixedly connected to a plug rod 2, the left and right sides of the plug rod 2 are fixedly connected to positioning blocks 3, the left and right sides of the plug rod 2 are provided with mounting grooves 4, the inner wall of the mounting groove 4 is fixedly connected to a connecting spring 5, the side of the connecting spring 5 away from the mounting groove 4 is fixedly connected to a limiting ball 6, the side of the plug rod 2 away from the first screw rod 1 is slidably connected to a second screw rod 7, the top of the second screw rod 7 is provided with a plug groove 8, the inner wall of the plug groove 8 is provided with a positioning groove 9, the inner wall of the plug groove 8 is provided with a sliding groove 10, and the inner wall of the plug groove 8 is provided with a limiting groove 11.

[0023] The first screw rod 1 is inserted into the plug-in slot 8 of the second screw rod 7 through the plug-in rod 2, and the positioning block 3 slides in the slide slot 10 to achieve rapid positioning. After moving a certain distance, the limiting ball 6 squeezes the connecting spring 5 inward and slides into the installation slot 4. The first screw rod 1 is continued to be moved to move the positioning block 3 into the positioning slot 9. The first screw rod 1 is rotated 90 degrees. Since the central angle of the positioning slot 9 corresponds to it, the position of the positioning block 3 is fixed after rotation. At the same time, the limiting ball 6 is clamped in the inside of the limiting slot 11, and its stability is ensured by the elastic force of the connecting spring 5, thereby completing the splicing of the two screw rods and avoiding inconvenience during transportation and processing.

[0024] The positioning block 3 is located inside the positioning groove 9, the limiting ball 6 is located inside the mounting groove 4, the limiting ball 6 and the limiting groove 11 are adapted to each other, the surfaces of the second screw rod 7 and the first screw rod 1 are both provided with external threads, and the positioning groove 9 adopts an arc structure.

[0025] A nut moving sleeve 12 is provided on the surface of the second screw rod 7, an internal thread 13 is provided on the inner wall of the nut moving sleeve 12, a sliding ball 14 is provided inside the internal thread 13, a first limit baffle 15 is provided inside the nut moving sleeve 12, and a first bolt 16 is threadedly connected to the left and right sides of the first limit baffle 15.

[0026] The internal thread 13 and the external thread form a sliding channel, the sliding ball 14 is located inside the sliding channel, the first limit baffle 15 adopts an annular structure, and the first bolt 16 and the nut moving sleeve 12 are threadedly connected.

[0027] A movable sleeve fixing plate 17 is fixedly connected to one side of the nut movable sleeve 12 close to the first screw rod 1 , a second limiting baffle 18 is provided inside the movable sleeve fixing plate 17 , and second bolts 19 are threadedly connected to the left and right sides of the second limiting baffle 18 .

[0028] By arranging the first limit baffle 15 and the second limit plate inside the nut moving sleeve 12 and the moving sleeve fixed plate 17, the sliding ball 14 is prevented from moving out when sliding, and the installation and disassembly of the first limit baffle 15 and the second limit plate are realized through the structure of the first bolt 16 and the second bolt 19, which is convenient for maintenance.

[0029] A plug hole 20 is provided at the top of the nut moving sleeve 12 , a circulator 21 is provided inside the plug hole 20 , a positioning plate 22 is provided at the top of the circulator 21 , and a fastening bolt 23 is threadedly connected to the middle of the positioning plate 22 .

[0030] When the ball screw is working, the nut moving sleeve 12 slides on the surface of the ball screw, and the sliding ball 14 moves in the sliding channel formed by the ball screw and the nut moving sleeve 12, thereby improving the smoothness of the screw movement, and the circulation of the sliding ball 14 is ensured by the circulator 21, so that it always slides in the nut moving sleeve 12.

[0031] There are four plug-in holes 20 , the circulator 21 adopts a U-shaped structure, and there are two positioning plates 22 . The bottom ends of the two positioning plates 22 are in contact with the nut moving sleeve 12 .

[0032] The utility model provides a ball screw with a spliced ​​structure, and the specific working principle is as follows:

[0033] When in use, the first screw rod 1 is inserted into the plug-in slot 8 of the second screw rod 7 through the plug-in rod 2, and the positioning block 3 slides in the slide slot 10 to achieve rapid positioning. After moving a certain distance, the limiting ball 6 squeezes the connecting spring 5 inward and slides into the installation slot 4, and continues to move the first screw rod 1 to make the positioning block 3 move into the positioning slot 9. The first screw rod 1 is rotated to rotate it 90 degrees. The limiting ball 6 is clamped in the inside of the limiting slot 11, and its stability is ensured by the elastic force of the connecting spring 5, thereby completing the splicing of the two screw rods. When the ball screw is working, the nut moving sleeve 12 slides on the surface of the ball screw, and the sliding ball 14 moves in the sliding channel formed by the ball screw and the nut moving sleeve 12, thereby improving the smoothness of the screw during movement, and ensuring the circulation of the sliding ball 14 during movement through the circulator 21.

[0034] Although the 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 variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A ball screw with a spliced ​​structure, comprising a first screw rod (1), characterized in that: The bottom end of the first screw rod (1) is fixedly connected to a plug rod (2), and the left and right sides of the plug rod (2) are fixedly connected to positioning blocks (3). The left and right sides of the plug rod (2) are provided with mounting grooves (4), and the inner wall of the mounting groove (4) is fixedly connected to a connecting spring (5). The side of the connecting spring (5) away from the mounting groove (4) is fixedly connected to a limiting ball (6), and the side of the plug rod (2) away from the first screw rod (1) is slidably connected to a second screw rod (7), and the top of the second screw rod (7) is provided with a plug groove (8), the inner wall of the plug groove (8) is provided with a positioning groove (9), the inner wall of the plug groove (8) is provided with a sliding groove (10), and the inner wall of the plug groove (8) is provided with a limiting groove (11).

2. The ball screw with a spliced ​​structure according to claim 1, characterized in that: The positioning block (3) is located inside the positioning groove (9), the limiting ball (6) is located inside the mounting groove (4), the limiting ball (6) and the limiting groove (11) are adapted to each other, the surfaces of the second screw rod (7) and the first screw rod (1) are both provided with external threads, and the positioning groove (9) adopts an arc structure.

3. The ball screw with a spliced ​​structure according to claim 1, characterized in that: A nut moving sleeve (12) is provided on the surface of the second screw rod (7), an inner wall of the nut moving sleeve (12) is provided with an internal thread (13), a sliding ball (14) is provided inside the internal thread (13), a first limit baffle (15) is provided inside the nut moving sleeve (12), and first bolts (16) are threadedly connected to the left and right sides of the first limit baffle (15).

4. The ball screw with a spliced ​​structure according to claim 3, characterized in that: The internal thread (13) and the external thread form a sliding channel, the sliding ball (14) is located inside the sliding channel, the first limit baffle (15) adopts an annular structure, and the first bolt (16) and the nut moving sleeve (12) are threadedly connected.

5. The ball screw with a spliced ​​structure according to claim 3, characterized in that: A movable sleeve fixing plate (17) is fixedly connected to one side of the nut movable sleeve (12) close to the first screw rod (1), a second position limiting baffle (18) is provided inside the movable sleeve fixing plate (17), and second bolts (19) are threadedly connected to the left and right sides of the second position limiting baffle (18).

6. The ball screw with a spliced ​​structure according to claim 3, characterized in that: A plug hole (20) is provided on the top of the nut moving sleeve (12), a circulator (21) is provided inside the plug hole (20), a positioning plate (22) is provided on the top of the circulator (21), and a fastening bolt (23) is threadedly connected to the middle of the positioning plate (22).

7. The ball screw with a spliced ​​structure according to claim 6, characterized in that: The number of the plug holes (20) is four, the circulator (21) adopts a U-shaped structure, the number of the positioning plates (22) is two, and the bottom ends of the two positioning plates (22) are in contact with the nut moving sleeve (12).

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