A lead screw that is convenient for splicing and disassembly and its splicing method

Abstract

The present invention discloses a lead screw that is convenient for splicing and disassembly and its splicing method, which relates to the technical field of lead screws. In order to solve the problem that most of the existing ball screws are spliced and fixed by means of threads, and it takes a long time to rotate the lead screw during disassembly, resulting in inconvenient splicing and disassembly. One end of the first lead screw is provided with a second lead screw. A nut moving sleeve is arranged outside the first lead screw. Screw threads are arranged on the outer walls of the first lead screw and the second lead screw, and the screw threads are an integral structure with the first lead screw and the second lead screw. One end of the second lead screw is provided with a first connection plug board. A second connection plug board is arranged on one side of the first connection plug board, and the second connection plug board and the first connection plug board are an integral structure with the second lead screw. Limiting rubber balls are arranged at one ends of the second connection plug board and the first connection plug board. A plug board circular groove is arranged on the surface of one end of the first lead screw.

Description

Technical Field

[0001] The present invention relates to the technical field of lead screws, and specifically to a lead screw that is convenient for splicing and disassembling and its splicing method. Background Technique

[0002] The ball screw is an ideal product for converting rotary motion into linear motion or vice versa. It is the most commonly used transmission component in machine tools and precision machinery. Its main function is to convert rotational motion into linear motion, or convert torque into axial reciprocating force, and at the same time has the characteristics of high precision, reversibility, and high efficiency. Due to its very small frictional resistance, the ball screw is widely used in various industrial equipment and precision instruments. The ball screw consists of a screw rod, a nut, steel balls, preloading sheets, a reverser, and a dust protector. Its function is to convert rotary motion into linear motion, which is a further extension and development of the Acme screw. The significance of this development is to change the bearing from a sliding action to a rolling action. Until recent years, the ball screw has become one of the most widely used components in the industrial community.

[0003] Most of the existing ball screws are spliced and fixed by means of threads. When disassembling, it is necessary to rotate the lead screw for a long time, resulting in inconvenient splicing and disassembling. For this reason, we provide a lead screw that is convenient for splicing and disassembling and its splicing method. Summary of the Invention

[0004] The purpose of the present invention is to provide a lead screw that is convenient for splicing and disassembling and its splicing method, so as to solve the problem that most of the existing ball screws are spliced and fixed by means of threads, and it is necessary to rotate the lead screw for a long time when disassembling, resulting in inconvenient splicing and disassembling as mentioned in the above background technique.

[0005] To achieve the above purpose, the present invention provides the following technical solution: A lead screw that is convenient for splicing and disassembling, including a first lead screw, a second lead screw is provided at one end of the first lead screw, a nut moving sleeve is provided outside the first lead screw, screw threads are provided on the outer walls of both the first lead screw and the second lead screw, and the screw threads are integral structures with both the first lead screw and the second lead screw. A first connection plug board is provided at one end of the second lead screw, a second connection plug board is provided on one side of the first connection plug board, and the second connection plug board and the first connection plug board are integral structures with the second lead screw. Limit rubber balls are provided at one ends of both the second connection plug board and the first connection plug board. An insertion board circular groove is provided on the surface of one end of the first lead screw, and the insertion board circular groove is an integral structure with the first lead screw. A center seat is provided inside the insertion board circular groove, and a spherical ball rotating groove is provided on the outer wall of the center seat, and the spherical ball rotating groove is an integral structure with the center seat.

[0006] Preferably, a first spherical groove is provided on the front surface of the central seat, and a second spherical groove is provided on the rear surface of the central seat. Both the first spherical groove and the second spherical groove are integrally structured with the central seat. One end of each of the first spherical groove and the second spherical groove is open, and the first spherical groove and the second spherical groove communicate with the spherical rotation groove.

[0007] Preferably, a first limiting baffle is provided inside the spherical rotation groove, and a second limiting baffle is provided on one side of the first limiting baffle. Both the first limiting baffle and the second limiting baffle are integrally structured with the central seat.

[0008] Preferably, air vent cavities are provided inside both the second connection plug and the first connection plug. The two air vent cavities are integrally structured with the second connection plug and the first connection plug respectively. An air inlet is provided at one end of the air vent cavity, and the air inlet communicates with the air vent cavity.

[0009] Preferably, a gas outlet is provided on the side surface of the air vent cavity, and the gas outlet communicates with the air vent cavity. A gas storage cavity is provided inside the limiting rubber ball, and the gas storage cavity is integrally structured with the limiting rubber ball. A gas connection port is provided on one side surface of the limiting rubber ball, and the gas connection port communicates with the gas outlet.

[0010] Preferably, a first air inlet socket is provided on the other end surface of the second lead screw. A second air inlet socket is provided on one side of the first air inlet socket. Both the first air inlet socket and the second air inlet socket are integrally structured with the second lead screw. Air blocking and sealing plugs are provided inside both the first air inlet socket and the second air inlet socket, and the two air blocking and sealing plugs are tightly connected to the first air inlet socket and the second air inlet socket respectively.

[0011] Preferably, a moving sleeve fixing plate is provided at one end of the nut moving sleeve. The moving sleeve fixing plate is integrally structured with the nut moving sleeve. Fixing holes are provided on the surface of the moving sleeve fixing plate, and the fixing holes are integrally structured with the moving sleeve fixing plate. An inspection opening is provided on the surface of the nut moving sleeve, and the inspection opening is integrally structured with the nut moving sleeve.

[0012] Preferably, a sealing protection cover is provided inside the inspection opening. Bolt recessed grooves are provided at the corners of the sealing protection cover, and the bolt recessed grooves are integrally structured with the sealing protection cover. Fixing bolts are provided inside the bolt recessed grooves, and the sealing protection cover is threadedly connected to the nut moving sleeve through the fixing bolts. There are four fixing bolts and bolt recessed grooves each. Dust-proof pads are provided at both ends inside the nut moving sleeve, and there are two dust-proof pads.

[0013] Preferably, a smooth plane is provided at one end of the lead screw thread, and the two smooth planes are integrally structured with the first lead screw and the second lead screw respectively.

[0014] Preferably, a splicing method for a lead screw that is convenient for splicing and disassembly includes the following steps:

[0015] Step 1: Align the end of the second lead screw having the first connection plug and the second connection plug with the end of the first lead screw having the circular slot for the plug.

[0016] Step 2: After alignment, insert the first connection plug and the second connection plug into the circular slot for the plug. When inserting, align the limit rubber balls at one end of the first connection plug and the second connection plug with the first spherical groove and the second spherical groove.

[0017] Step 3: After inserting to the bottom, rotate the second lead screw. The two limit rubber balls rotate along the spherical rotating groove until they stop after touching the first limit baffle and the second limit baffle.

[0018] Step 4: When further fixing is required, remove the two air-blocking and sealing plugs, and externally connect the first air inlet socket and the second air inlet socket to an air filling mechanism.

[0019] Step 5: The air filling mechanism fills air into the first connection plug and the second connection plug. The air enters the limit rubber balls along the air vent cavity, further expands the limit rubber balls, presses against the inner wall of the spherical rotating groove, and then re-fix the two air-blocking and sealing plugs.

[0020] Compared with the prior art, the beneficial effects of the present invention are:

[0021] 1. By setting a circular slot for the plug on the surface of one end of the first lead screw, setting a central seat inside the circular slot for the plug, respectively setting a first spherical groove and a second spherical groove on the front and rear surfaces of the central seat, and setting a spherical rotating groove on the outer wall of the central seat, with the spherical rotating groove communicating with the first spherical groove and the second spherical groove, setting a first connection plug and a second connection plug at one end of the second lead screw, and setting limit rubber balls at one end of the first connection plug and the second connection plug. When connecting the first lead screw and the second lead screw, insert the first connection plug and the second connection plug into the circular slot for the plug. When inserting, align the limit rubber balls at one end of the first connection plug and the second connection plug with the first spherical groove and the second spherical groove. After inserting to the bottom, rotate the second lead screw. The two limit rubber balls rotate along the spherical rotating groove until they stop after touching the first limit baffle and the second limit baffle. Utilize the friction between the limit rubber balls and the inner wall of the spherical rotating groove to achieve the splicing and fixing of the first lead screw and the second lead screw. Compared with using thread fixing, the number of rotation turns is reduced. When the first lead screw and the second lead screw are relatively long, long-term rotation will also increase the human labor loss. By fixing in the way of the present invention, the convenience of fixing is improved.

[0022] 2. By providing a first air inlet socket and a second air inlet socket on the surface of the other end of the second lead screw, the first air inlet socket and the second air inlet socket penetrate through the second lead screw and are internally communicated with the first connection plug board and the second connection plug board respectively. The air vent cavities inside the first connection plug board and the second connection plug board are internally communicated with the inside of the limit rubber ball through the air outlet. When it is necessary to further fix the limit rubber ball, remove the two air-blocking and sealing plugs, externally connect the first air inlet socket and the second air inlet socket to an air filling mechanism, and the air filling mechanism fills air into the first connection plug board and the second connection plug board. The air enters the inside of the limit rubber ball along the air vent cavity, further expands the limit rubber ball, presses against the inner wall of the spherical rotation groove, increases the extrusion force, and thus improves the stability of the splicing. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a schematic diagram of the overall structure of the present invention;

[0024] Figure 2 is a schematic diagram of the structure of the rear end of the second lead screw of the present invention;

[0025] Figure 3 is a front view schematic diagram of the first lead screw of the present invention;

[0026] Figure 4 is a schematic diagram of the connection cross-section structure of the first lead screw and the center seat of the present invention;

[0027] Figure 5 is a schematic diagram of the circular groove structure of the plug board of the present invention;

[0028] Figure 6 is a schematic diagram of the connection structure between the first connection plug board and the limit rubber ball of the present invention;

[0029] In the figure: 1. First lead screw; 2. Second lead screw; 3. Nut moving sleeve; 4. Moving sleeve fixing plate; 5. Fixing hole; 6. Dust-proof pad; 7. Inspection port; 8. Sealing protection cover; 9. Fixing bolt; 10. First air inlet socket; 11. Second air inlet socket; 12. First connection plug board; 13. Limit rubber ball; 14. Second connection plug board; 15. Circular groove of the plug board; 16. Center seat; 17. First spherical groove; 18. Spherical rotation groove; 19. First limit baffle; 20. Second limit baffle; 21. Second spherical groove; 22. Air outlet; 23. Gas connection port; 24. Gas storage cavity; 25. Air inlet; 26. Air vent cavity; 27. Lead screw thread; 28. Bolt depression groove; 29. Smooth plane; 30. Air-blocking and sealing plug. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0030] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments.

[0031] Please refer to Figure 1-6 , an embodiment provided by the present invention: a lead screw that is convenient for splicing and disassembling, including a first lead screw 1, a second lead screw 2 is provided at one end of the first lead screw 1, a nut moving sleeve 3 is provided outside the first lead screw 1, screw threads 27 are provided on the outer walls of the first lead screw 1 and the second lead screw 2, and the screw threads 27 and the first lead screw 1 and the second lead screw 2 are all of an integral structure. A first connection plug 12 is provided at one end of the second lead screw 2, a second connection plug 14 is provided on one side of the first connection plug 12, and the second connection plug 14 and the first connection plug 12 and the second lead screw 2 are of an integral structure. Limiting rubber balls 13 are provided at one ends of the second connection plug 14 and the first connection plug 12. A plug circular groove 15 is provided on the surface of one end of the first lead screw 1, and the plug circular groove 15 and the first lead screw 1 are of an integral structure. A center seat 16 is provided inside the plug circular groove 15, and a spherical rotation groove 18 is provided on the outer wall of the center seat 16, and the spherical rotation groove 18 and the center seat 16 are of an integral structure.

[0032] Furthermore, a first spherical groove 17 is provided on the front surface of the center seat 16, a second spherical groove 21 is provided on the rear surface of the center seat 16, and the first spherical groove 17 and the second spherical groove 21 and the center seat 16 are all of an integral structure. One ends of the first spherical groove 17 and the second spherical groove 21 are both open, and the first spherical groove 17 and the second spherical groove 21 communicate with the spherical rotation groove 18. Insert the first connection plug 12 and the second connection plug 14 into the plug circular groove 15. When inserting, the limiting rubber balls 13 at one ends of the first connection plug 12 and the second connection plug 14 are aligned with the first spherical groove 17 and the second spherical groove 21, which plays a limiting effect to prevent deviation. After inserting to the bottom, rotate the second lead screw 2, and the two limiting rubber balls 13 rotate along the spherical rotation groove 18, and are stuck inside the spherical rotation groove 18 through the shape of the limiting rubber balls 13. At the same time, the first lead screw 1 and the second lead screw 2 are spliced and fixed through friction, improving the convenience of disassembly and splicing.

[0033] Furthermore, a first limiting baffle 19 is provided inside the spherical rotation groove 18, a second limiting baffle 20 is provided on one side of the first limiting baffle 19, and the first limiting baffle 19 and the second limiting baffle 20 and the center seat 16 are all of an integral structure, which plays a limiting effect on the rotation of the limiting rubber ball 13 and can stop rotating when touched.

[0034] Furthermore, air vent cavities 26 are provided inside the second connection plug 14 and the first connection plug 12, and the two air vent cavities 26 and the second connection plug 14 and the first connection plug 12 are all of an integral structure. An air inlet 25 is provided at one end of the air vent cavity 26, and the air inlet 25 communicates with the air vent cavity 26, facilitating the flow of gas through the air vent cavity 26.

[0035] Further, a gas outlet 22 is provided on the side surface of the ventilation cavity 26, and the gas outlet 22 communicates with the ventilation cavity 26. A gas storage cavity 24 is provided inside the limit rubber ball 13, and the gas storage cavity 24 and the limit rubber ball 13 are of an integral structure. A gas connection port 23 is provided on one side surface of the limit rubber ball 13, and the gas connection port 23 communicates with the gas outlet 22, facilitating expansion by means of gas pressurization.

[0036] Further, a first air inlet socket 10 is provided on the other end surface of the second lead screw 2. A second air inlet socket 11 is provided on one side of the first air inlet socket 10, and both the first air inlet socket 10 and the second air inlet socket 11 are of an integral structure with the second lead screw 2. Air blocking and sealing plugs 30 are provided inside both the first air inlet socket 10 and the second air inlet socket 11, and the two air blocking and sealing plugs 30 are tightly connected to the first air inlet socket 10 and the second air inlet socket 11 respectively. The first air inlet socket 10 and the second air inlet socket 11 are externally connected to a gas filling mechanism. The gas filling mechanism fills gas into the first connection plug plate 12 and the second connection plug plate 14. The gas enters the inside of the limit rubber ball 13 along the ventilation cavity 26, further expanding the limit rubber ball 13, pressing against the inner wall of the spherical rotation groove 18, increasing the extrusion force, and thus improving the stability of splicing.

[0037] Further, a moving sleeve fixing plate 4 is provided at one end of the nut moving sleeve 3, and the moving sleeve fixing plate 4 and the nut moving sleeve 3 are of an integral structure. Fixing holes 5 are provided on the surface of the moving sleeve fixing plate 4, and the fixing holes 5 and the moving sleeve fixing plate 4 are of an integral structure. An inspection port 7 is provided on the surface of the nut moving sleeve 3, and the inspection port 7 and the nut moving sleeve 3 are of an integral structure, facilitating the replacement of the balls inside the nut moving sleeve 3.

[0038] Further, a sealing protection cover 8 is provided inside the inspection port 7. Bolt recesses 28 are provided at the corners of the sealing protection cover 8, and the bolt recesses 28 and the sealing protection cover 8 are of an integral structure. Fixing bolts 9 are provided inside the bolt recesses 28, and the sealing protection cover 8 is threadedly connected to the nut moving sleeve 3 through the fixing bolts 9. There are four fixing bolts 9 and bolt recesses 28 respectively. Dust-proof pads 6 are provided at both ends inside the nut moving sleeve 3, and there are two dust-proof pads 6, playing a protective role for the inspection port 7 and preventing damage to the internal balls.

[0039] Further, a smooth plane 29 is provided at one end of the lead screw thread 27, and the two smooth planes 29 are of an integral structure with the first lead screw 1 and the second lead screw 2 respectively, limiting the moving distance of the nut moving sleeve 3 through the smooth plane 29.

[0040] Further, a splicing method for a lead screw facilitating splicing and disassembly includes the following steps:

[0041] Step 1: Align the end of the second lead screw 2 with the first connection plug board 12 and the second connection plug board 14 with the end of the first lead screw 1 with the plug board circular groove 15;

[0042] Step 2: After alignment, insert the first connection plug board 12 and the second connection plug board 14 into the plug board circular groove 15. When inserting, the limiting rubber balls 13 at one end of the first connection plug board 12 and the second connection plug board 14 are aligned with the first spherical groove 17 and the second spherical groove 21;

[0043] Step 3: After inserting to the bottom, rotate the second lead screw 2, and the two limiting rubber balls 13 rotate along the spherical rotating groove 18 until they touch the first limiting baffle 19 and the second limiting baffle 20 and then stop;

[0044] Step 4: When further fixation is required, remove the two air-blocking and sealing plugs 30, and externally connect the first air inlet socket 10 and the second air inlet socket 11 to an air filling mechanism;

[0045] Step 5: The air filling mechanism fills air into the first connection plug board 12 and the second connection plug board 14. The air enters the limiting rubber balls 13 along the air vent cavity 26, further expands the limiting rubber balls 13, and presses against the inner wall of the spherical rotating groove 18, and then re-fix the two air-blocking and sealing plugs 30.

[0046] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and without departing from the spirit or basic characteristics of the present invention, the present invention can be implemented in other specific forms. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present invention. Any reference signs in the claims should not be regarded as limiting the claimed rights.

Claims

1. A lead screw that is convenient for splicing and disassembly, including a first lead screw (1), Characterized in that: One end of the first lead screw (1) is provided with a second lead screw (2), a nut moving sleeve (3) is arranged outside the first lead screw (1), screw threads (27) are arranged on the outer walls of the first lead screw (1) and the second lead screw (2), and the screw threads (27) and the first lead screw (1) and the second lead screw (2) are all of an integral structure. One end of the second lead screw (2) is provided with a first connection plug board (12), a second connection plug board (14) is arranged on one side of the first connection plug board (12), and the second connection plug board (14) and the first connection plug board (12) are of an integral structure with the second lead screw (2). Limiting rubber balls (13) are arranged at one ends of the second connection plug board (14) and the first connection plug board (12). A plug board circular groove (15) is arranged on the surface of one end of the first lead screw (1), and the plug board circular groove (15) is of an integral structure with the first lead screw (1). A center seat (16) is arranged inside the plug board circular groove (15), a spherical ball rotating groove (18) is arranged on the outer wall of the center seat (16), and the spherical ball rotating groove (18) is of an integral structure with the center seat (16). Ventilation cavities (26) are arranged inside the second connection plug board (14) and the first connection plug board (12), and the two ventilation cavities (26) are respectively of an integral structure with the second connection plug board (14) and the first connection plug board (12). An air inlet (25) is arranged at one end of the ventilation cavity (26), and the air inlet (25) communicates with the ventilation cavity (26). An air outlet (22) is arranged on the side surface of the ventilation cavity (26), and the air outlet (22) communicates with the ventilation cavity (26). A gas storage cavity (24) is arranged inside the limiting rubber ball (13), and the gas storage cavity (24) is of an integral structure with the limiting rubber ball (13). A gas connection port (23) is arranged on one side surface of the limiting rubber ball (13), and the gas connection port (23) communicates with the air outlet (22). A first air inlet socket (10) is arranged on the surface of the other end of the second lead screw (2), a second air inlet socket (11) is arranged on one side of the first air inlet socket (10), and the first air inlet socket (10) and the second air inlet socket (11) are of an integral structure with the second lead screw (2). Plugging air sealing plugs (30) are arranged inside the first air inlet socket (10) and the second air inlet socket (11), and the two plugging air sealing plugs (30) are respectively tightly connected with the first air inlet socket (10) and the second air inlet socket (11).

2. The lead screw convenient for splicing and disassembly according to claim 1, Characterized in that: The front surface of the central seat (16) is provided with a first spherical groove (17), and the rear surface of the central seat (16) is provided with a second spherical groove (21). The first spherical groove (17) and the second spherical groove (21) are both integrally structured with the central seat (16). One end of each of the first spherical groove (17) and the second spherical groove (21) is open, and the first spherical groove (17) and the second spherical groove (21) communicate with the spherical rotation groove (18).

3. A screw rod that is convenient for splicing and disassembling according to claim 1, characterized in that: A first limit baffle (19) is arranged inside the spherical rotation groove (18), a second limit baffle (20) is arranged on one side of the first limit baffle (19), and the first limit baffle (19) and the second limit baffle (20) are both integrally structured with the central seat (16).

4. A screw rod that is convenient for splicing and disassembling according to claim 1, characterized in that: One end of the nut moving sleeve (3) is provided with a moving sleeve fixing plate (4), and the moving sleeve fixing plate (4) is integrally structured with the nut moving sleeve (3). A fixing hole (5) is arranged on the surface of the moving sleeve fixing plate (4), and the fixing hole (5) is integrally structured with the moving sleeve fixing plate (4). An inspection port (7) is arranged on the surface of the nut moving sleeve (3), and the inspection port (7) is integrally structured with the nut moving sleeve (3).

5. A screw rod that is convenient for splicing and disassembling according to claim 4, characterized in that: A sealing protection cover (8) is arranged inside the inspection port (7). Bolt depression grooves (28) are arranged at the corners of the sealing protection cover (8), and the bolt depression grooves (28) are integrally structured with the sealing protection cover (8). A fixing bolt (9) is arranged inside the bolt depression grooves (28), and the sealing protection cover (8) is threadedly connected to the nut moving sleeve (3) through the fixing bolt (9). Both the fixing bolt (9) and the bolt depression grooves (28) are provided with four. Dust-proof pads (6) are arranged at both ends inside the nut moving sleeve (3), and two dust-proof pads (6) are provided.

6. A screw rod that is convenient for splicing and disassembling according to claim 1, characterized in that: One end of the screw thread (27) is provided with a smooth plane (29), and the two smooth planes (29) are respectively integrally structured with the first screw rod (1) and the second screw rod (2).

7. A splicing method of a screw rod that is convenient for splicing and disassembling, implemented based on the screw rod that is convenient for splicing and disassembling according to any one of claims 1-6, characterized in that, including the following steps: Step 1: Align the end of the second screw rod (2) having the first connection plug board (12) and the second connection plug board (14) with the end of the first screw rod (1) having the plug board circular groove (15); Step 2: After alignment, insert the first connection plug board (12) and the second connection plug board (14) into the plug board circular groove (15). When inserting, the limit rubber balls (13) at one end of the first connection plug board (12) and the second connection plug board (14) are aligned with the first spherical groove (17) and the second spherical groove (21); Step 3: After inserting to the bottom, rotate the second screw rod (2), and the two limit rubber balls (13) rotate along the ball rotation groove (18) until they touch the first limit baffle (19) and the second limit baffle (20) and stop; Step 4: When further fixing is required, remove the two air-blocking sealing plugs (30) and connect the first air inlet socket (10) and the second air inlet socket (11) to an external air filling mechanism; Step 5: The air filling mechanism fills air into the first connecting plug plate (12) and the second connecting plug plate (14), and the air enters the limiting rubber ball (13) along the ventilation cavity (26), further expanding the limiting rubber ball (13) and pressing against the inner wall of the ball rotation groove (18), and then the two air blocking sealing plugs (30) are re-fixed.

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