Screw rod assembly convenient for assembling circulator

Abstract

The utility model discloses a screw rod assembly convenient for assembling a circulator, which comprises a screw rod, a nut seat and a plurality of balls, the screw rod is provided with a spiral groove I, the nut seat is provided with a spiral groove II, the spiral groove I and the spiral groove II form a space for placing the balls, and the screw rod assembly also comprises the circulator, a groove is formed in the side face of the nut seat and corresponds to the circulator, a threaded cylinder is arranged on the overlapping portion of the groove and the circulator, the circulator is provided with a bolt, and after the circulator is arranged in the groove from the outside of the nut seat, the bolt penetrates through the threaded cylinder and is in threaded connection with the threaded cylinder.

Description

Technical Field

[0001] The utility model belongs to the technical field of screw rod components, in particular to a screw rod component which is convenient for assembling a circulator. Background Art

[0002] Ball screws are ideal products for converting rotary motion into linear motion, or converting linear motion into rotary motion, and are widely used in various industrial equipment and precision instruments.

[0003] For example, the patent document "CN103821894A" discloses a ball screw, which includes a screw, a nut seat and a circulator. The nut seat is fixed to the outside of the screw, and an oil channel is provided on the nut seat. A circulator and a pre-compression sheet are provided at the rear end of the nut seat where the screw is in contact, and a steel ball is provided on the screw. Beneficial effect: The nut seat is provided with an oil channel to lubricate the screw and reduce the damage to the screw caused by friction.

[0004] In this patent, the circulation of balls is completed by building a circulator and a pre-pressing sheet inside the ball screw, thereby completing the linear motion of the ball screw. The circulator is an indispensable part in the ball screw, and the appendix of the "a ball screw" published in the patent document "CN103821894" Figure 1 It can be seen that the circulator with additional mark 3 needs to be installed from the inside of the nut seat. Since the space inside the nut seat is very narrow, installation is very difficult. When maintenance is required, the screw and the nut seat must be separated before operation. Utility Model Content

[0005] The purpose of the utility model is to provide a screw rod assembly which is convenient for assembling a circulator, so as to solve the problems raised in the above-mentioned background technology.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A screw assembly that is convenient for assembling a circulator, comprising a screw, a nut seat and balls, wherein the number of the balls is several, the screw is provided with a first spiral groove, the nut seat is provided with a second spiral groove, the first spiral groove and the second spiral groove form a space for placing the balls, and also comprises a circulator, the nut seat side is provided with a groove, the groove corresponds to the circulator, the overlapping part of the groove and the circulator is provided with a threaded barrel, the circulator is provided with a bolt, after the circulator is placed in the groove from the outside of the nut seat, the bolt passes through the threaded barrel and is threadedly connected with the threaded barrel.

[0008] By adopting the above technical solutions, the external circulator design reduces the complexity of the internal structure, making the assembly process more intuitive and convenient, reducing assembly time and labor costs; it can make the design of the entire screw assembly more concise, reduce the number and complexity of internal parts, thereby reducing manufacturing difficulty and production costs; it can adjust the size, shape and material of the external circulator according to specific application requirements, thereby providing greater design flexibility. Whether for light-load or heavy-load applications, the appropriate circulator specifications can be customized to ensure optimal performance.

[0009] Preferably, the bolt is set as a first bolt, the first bolt includes a head, a first rod and a second rod, the head, the first rod and the second rod of the first bolt are fixed as a whole in sequence; when the circulator is inserted into the groove, the overlapping part of the circulator and the groove is respectively provided with a limiting hole and a first thread

[0010] The limiting hole is colinear with the center line of the first threaded barrel, the area of ​​the head of the first bolt is larger than the barrel diameter of the limiting hole, the second rod portion of the first bolt is provided with an external thread, and the second rod portion of the first bolt is threadedly connected with the first threaded barrel.

[0011] By adopting the above technical solution, the first bolt and the first threaded barrel are threadedly connected, so that the screw assembly has high mechanical strength, can withstand large tension, shear and torque, and the device can be prevented from loosening to a large extent, ensuring the reliability of the connection. The threaded connection can easily disassemble and reassemble the circulator and the nut seat, which is convenient for repair and maintenance; during the working process of the screw assembly, the screw assembly will have a relatively large impact force, and the first bolt and the first threaded barrel are threadedly connected to resist vibration and impact.

[0012] Preferably, the circulator is provided with a limiting groove, and the limiting groove is connected to the limiting hole. When the first bolt passes through the limiting hole and the first threaded barrel in sequence, and the second rod portion of the first bolt is threadedly connected to the first threaded barrel, the head of the first bolt is placed in the limiting groove.

[0013] By adopting the above technical solution, when the ball screw moves, the head of the first bolt is placed in the limit groove, so that the side surface of the nut seat is smooth, which can reduce friction and wear, thereby extending the service life of the ball screw assembly and the nut seat; and the smooth surface helps to improve the stability of the ball screw movement and reduce vibration and noise. It can also make the nut seat design more compact, thereby saving space and is suitable for application scenarios with limited space.

[0014] Preferably, a bottom area of ​​an end of the first rod portion facing the head portion is smaller than a bottom area of ​​an end of the first rod portion facing the second rod portion.

[0015] By adopting the above technical solution, it is more convenient for the first bolt to pass through the limiting groove, the limiting hole and the first threaded barrel in sequence.

[0016] Preferably, when the circulator is inserted into the groove, the overlapping part of the circulator and the groove is respectively provided with a second threaded barrel and a third threaded barrel, the center lines of the second threaded barrel and the third threaded barrel are colinear, and the barrel diameters of the second threaded barrel and the third threaded barrel are the same, and the bolt can be threadedly connected with the second threaded barrel and the third threaded barrel.

[0017] By adopting the above technical solution, the connection strength between the circulator and the nut seat is enhanced by using bolts to connect the second threaded barrel and the third threaded barrel respectively, which can increase the force-bearing area, disperse stress, and improve stability and safety. A larger number of thread turns increases the friction of the thread, making the connection tighter, thereby effectively preventing loosening under vibration conditions of the nut seat. A larger number of thread turns can improve the sealing performance of the threaded connection, which helps prevent gas from entering the oxidized ball.

[0018] Preferably, the side edge of the cylindrical fixing portion of the nut seat is arc-shaped.

[0019] By adopting the above technical solution, the curved side can distribute stress more evenly and reduce stress concentration, thereby reducing the risk of material fatigue and fracture. The uniform stress distribution helps to improve the overall strength and durability of the nut seat, and the curved design can reduce damage to the surface of the nut seat and improve the safety performance of the nut seat.

[0020] Beneficial effects of the utility model:

[0021] 1. The screw assembly for assembling the circulator in the present application reduces the complexity of the internal structure by adopting an external circulator design, making the assembly process more intuitive and convenient, reducing assembly time and labor costs; it can make the design of the entire screw assembly more concise, reduce the number and complexity of internal parts, thereby reducing manufacturing difficulty and production costs; it can adjust the size, shape and material of the external circulator according to specific application requirements, thereby providing greater design flexibility;

[0022] 2. The screw assembly of the circulator in the present application is convenient for assembly by adopting a threaded connection method between the first bolt and the first threaded barrel, so that the screw assembly has high mechanical strength, can withstand large tension, shear and torque, and enables the device to prevent loosening to a large extent, ensuring the reliability of the connection;

[0023] 3. The screw rod assembly of the present application facilitates the assembly of the circulator by adopting a method in which the bottom area of ​​the end of the first rod portion facing the head portion is smaller than the bottom area of ​​the end of the first rod portion facing the second rod portion, thereby making it easier for the first bolt to pass through the limit groove, the limit hole and the first threaded barrel in sequence.

[0024] Other features and advantages of the present invention will be described in detail in the subsequent specific implementation section. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 : Schematic diagram of the overall structure of the utility model.

[0026] Figure 2 : Explosion diagram of embodiment 1 of the utility model.

[0027] Figure 3 : The utility model Figure 2 Enlarged view of part A.

[0028] Figure 4 : Explosion diagram of embodiment 2 of the utility model.

[0029] Figure 5 : Schematic diagram of the structure of the first bolt and the circulator in Example 2 of the utility model.

[0030] Figure 6 : The utility model Figure 4 Enlarged view of part B.

[0031] Figure numerals: 1. screw rod; 2. nut seat; 3. spiral groove one; 4. spiral groove two; 5. circulator; 6. groove; 61. placement groove; 62. empty cylinder; 7. second threaded cylinder; 8. third threaded cylinder; 9. bolt; 10. first bolt; 101. head; 102. first rod part; 103. second rod part; 11. limiting hole; 12. first threaded cylinder; 13. limiting groove. DETAILED DESCRIPTION

[0032] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0033] Please refer to Figure 1-6 ; The present application discloses a screw assembly that is convenient for assembling a circulator: Embodiment 1:

[0034] Reference Figure 1-3A screw rod assembly convenient for assembling a circulator comprises a screw rod 1, a nut seat 2 and a ball. The screw rod 1 is provided with a spiral groove 1 3, and the nut seat 2 is provided with a spiral groove 2 4. The spiral groove 1 3 and the spiral groove 2 4 form a ball channel for placing the ball. The screw rod 1 passes through the nut seat 2, and the ball is driven to rotate by the thrust when the screw rod 1 rotates; the screw rod 1 assembly also comprises a circulator 5, and the circulator 5 comprises a limiting part and a reverse part. A groove 6 is provided on the side of the nut seat 2, and the groove 6 comprises a placement groove 61 and an empty cylinder 62, and the placement groove 61 and the empty cylinder 62 are provided. The empty cylinder 62 is connected, and the geometric shape of the placement groove 61 corresponds to the limiting part of the circulator 5, so that the limiting part can be clamped in the placement groove 61; the empty cylinder 62 corresponds to the reverse part of the circulator 5, so that the reverse part can be clamped in the empty cylinder 62; the reverse part of the circulator 5 is provided with a pipeline groove, and when the circulator 5 and the nut seat 2 are kept relatively fixed, the two end ports of the pipeline groove respectively correspond to different spiral grooves 4 of the nut seat 2, which can ensure the smooth flow of the balls in the nut seat 2 by effectively controlling the circulation path of the balls.

[0035] When the reverse portion is inserted into the empty cylinder 62, the limit portion can be inserted into the placement groove 61. At this time, the overlapped portion of the circulator 5 and the placement groove 61 is provided with a second threaded cylinder 7 and a third threaded cylinder 8, respectively. The inner walls of the second threaded cylinder 7 and the third threaded cylinder 8 are provided with internal threads. The center lines of the second threaded cylinder 7 and the third threaded cylinder 8 are colinear, and the cylinder diameters of the second threaded cylinder 7 and the third threaded cylinder 8 are the same. A bolt 9 can be used to threadably connect the second threaded cylinder 7 and the third threaded cylinder 8 to keep the circulator 5 and the nut seat 2 relatively fixed.

[0036] When in use, the operator first passes the screw rod 1 through the nut seat 2 to form a ball channel, and ensures that the ball is located in the ball channel. Subsequently, the reverse portion of the circulator 5 is aligned with the empty cylinder 62 of the nut seat 2, and the circulator 5 is placed in the groove 6 from the nut seat 2 from the outside to the inside. It is worth noting that the geometric shape of the placement groove 61 in the groove 6 is not limited. If the geometric shape of the placement groove 61 is a cylinder with a circular bottom surface, it is necessary to ensure that the second threaded cylinder 7 and the third threaded cylinder 8 are aligned. In this embodiment, the geometric shape of the placement groove 61 is a rectangular parallelepiped, so that the second threaded cylinder 7 and the third threaded cylinder 8 are easier to align. Then the bolt 9 is threadedly connected to the cylinder wall of the second threaded cylinder 7 and the third threaded cylinder 8, so as to achieve the relative fixation of the circulator 5 and the nut seat 2. After that, by manually rotating the screw rod 1 or driving the screw rod 1 with the help of a power device, the spiral groove 3 on the screw rod 1 will generate thrust, causing the ball to roll along the ball channel. When the ball rolls between the screw rod 1 and the ball channel of the nut seat 2, because its rolling friction coefficient is much lower than the sliding friction coefficient, the ball screw has a very high efficiency and can effectively convert rotational motion into linear motion. When the ball rolls to a port of the reverse part of the circulator 5, the ball will enter the pipeline groove in the circulator 5, and the circulator 5 will change the movement direction of the ball, so that it returns from one port to the other port of the reverse part, so that it continues to roll in the ball channel.

[0037] In order to improve the safety performance of the nut seat 2 and reduce damage to the surface of the nut seat 2, the side of the cylindrical fixed part of the nut seat 2 is set to be arc-shaped, so that the arc-shaped side can distribute stress more evenly and reduce stress concentration, thereby reducing the risk of material fatigue and fracture, and helping to improve the overall strength and durability of the nut seat 2. Embodiment 2:

[0038] The general structure of this embodiment is the same as that of the first embodiment.

[0039] This embodiment is different from the first embodiment in that:

[0040] Reference Figure 1 , Figure 4-6 , the bolt 9 is assumed to be a first bolt 10, the first bolt 10 comprises a head 101, a first rod 102 and a second rod 103, the head 101, the first rod 102 and the second rod 103 of the first bolt 10 are fixed as a whole in sequence; the bottom area of ​​one end of the first rod 102 facing the head 101 is smaller than the bottom area of ​​one end of the first rod 102 facing the second rod 103, and the second rod 103 is provided with an external thread;

[0041] When the limiting part of the circulator 5 is placed in the placement groove 61, the overlapping part of the limiting part and the placement groove 61 respectively opens a limiting hole 11 and a first threaded tube 12, and the center lines of the limiting hole 11 and the first threaded tube 12 are colinear. When the first bolt 10 passes through the limiting hole 11 and the first threaded tube 12, the second rod portion 103 of the first bolt 10 is threadedly connected with the first threaded tube 12; the threaded connection between the first bolt 10 and the first threaded tube 12 is adopted, so that the screw rod 1 assembly has higher mechanical strength, can withstand greater tension, shear and torque, and enables the device to prevent loosening to a large extent, thereby ensuring the reliability of the connection.

[0042] The area of ​​the head 101 of the first bolt 10 is larger than the aperture of the limiting hole 11 , so that after the first bolt 10 is threadedly connected with the first threaded barrel 12 , the head 101 of the first bolt 10 can keep the circulator 5 and the nut seat 2 relatively fixed.

[0043] Specifically, assuming that the circulator 5 of the screw assembly is used for a long time and the reverse part of the circulator 5 is damaged and needs to be replaced, the operator can loosen the first bolt 10 by using a tool, so that the second rod part 103 of the first bolt 10 is disconnected from the threaded connection with the first threaded tube 12, and then take out the first bolt 10, replace the damaged circulator 5 with a new circulator 5, place the new circulator 5 from the outside of the nut seat 2 in the groove 6 on the nut seat 2, align the limiting hole 11 with the barrel mouth of the first threaded tube 12, so that the limiting hole 11 is connected with the first threaded tube 12, and insert the first bolt 10. The first bolt 10 is threadedly connected to the first threaded tube 12 through the limiting hole 11. Since the bottom area of ​​the end of the first rod portion 102 of the first bolt 10 facing the head portion 101 is smaller than the bottom area of ​​the end of the first rod portion 102 facing the second rod portion 103, when the first bolt 10 is threadedly connected to the first threaded tube 12, the first rod portion 102 can maintain a distance from the hole wall of the limiting hole 11; after the first bolt 10 is threadedly connected to the first threaded tube 12, the head portion 101 of the first bolt 10 can press the limiting hole 11, so that the circulator 5 and the nut seat 2 remain relatively fixed.

[0044] In order to further improve the convenience of linear movement of the nut seat 2, a limiting groove 13 is opened in the limiting portion, and the limiting groove 13 is connected with the limiting hole 11. When the first bolt 10 passes through the limiting hole 11 and the first threaded tube 12 in sequence, and the second rod portion 103 of the first bolt 10 is threadedly connected with the first threaded tube 12, the head 101 of the first bolt 10 is placed in the limiting groove 13.

[0045] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

[0046] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementations that can be understood by those skilled in the art.

Claims

1. A screw assembly for assembling a circulator, comprising a screw (1), a nut seat (2) and a ball, wherein the number of the ball is several, the screw (1) is provided with a spiral groove 1 (3), the nut seat (2) is provided with a spiral groove 2 (4), the spiral groove 1 (3) and the spiral groove 2 (4) form a space for accommodating the ball, characterized in that: It also includes a circulator (5), wherein a groove (6) is provided on the side of the nut seat (2), the groove (6) corresponds to the circulator (5), a threaded barrel is provided at the overlapping portion of the groove (6) and the circulator (5), and the circulator (5) is provided with a bolt (9). After the circulator (5) is placed in the groove (6) from the outside of the nut seat (2), the bolt (9) passes through the threaded barrel and is threadedly connected to the threaded barrel.

2. A screw assembly for facilitating assembly of a circulator according to claim 1, characterized in that: The bolt (9) is configured as a first bolt (10), and the first bolt (10) comprises a head (101), a first rod (102) and a second rod (103), and the head (101), the first rod (102) and the second rod (103) of the first bolt (10) are fixed in sequence as a whole; when the circulator (5) is inserted into the groove (6), the overlapping portion of the circulator (5) and the groove (6) is respectively provided with a limiting hole (11) and a first threaded barrel ( 12), the limiting hole (11) is colinear with the center line of the first threaded barrel (12), the area of ​​the head (101) of the first bolt (10) is larger than the hole diameter of the limiting hole (11), the second rod portion (103) of the first bolt (10) is provided with an external thread, the first bolt (10) can pass through the limiting hole (11) and the first threaded barrel (12) in sequence, and the second rod portion (103) of the first bolt (10) is threadedly connected with the first threaded barrel (12).

3. A screw assembly for facilitating assembly of a circulator according to claim 2, characterized in that: The circulator (5) is provided with a limiting groove (13), and the limiting groove (13) is communicated with the limiting hole (11). When the first bolt (10) passes through the limiting hole (11) and the first threaded tube (12) in sequence, and the second rod portion (103) of the first bolt (10) is threadedly connected with the first threaded tube (12), the head portion (101) of the first bolt (10) is placed in the limiting groove (13).

4. A screw assembly for facilitating assembly of a circulator according to claim 2 or 3, characterized in that: The bottom area of ​​one end of the first rod portion (102) facing the head portion (101) is smaller than the bottom area of ​​one end of the first rod portion (102) facing the second rod portion (103).

5. A screw assembly for facilitating assembly of a circulator according to claim 1, characterized in that: When the circulator (5) is inserted into the groove (6), the overlapping parts of the circulator (5) and the groove (6) are respectively provided with a second threaded barrel (7) and a third threaded barrel (8), the center lines of the second threaded barrel (7) and the third threaded barrel (8) are colinear, and the barrel diameters of the second threaded barrel (7) and the third threaded barrel (8) are the same, and the bolt (9) can be threadedly connected with the second threaded barrel (7) and the third threaded barrel (8).

6. A screw assembly for facilitating assembly of a circulator according to claim 1, characterized in that: The side edge of the cylindrical fixing part of the nut seat (2) is arc-shaped.

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