Screw rod assembly convenient for mounting circulator

Abstract

A screw rod assembly facilitating installation of a circulator comprises a screw rod and a nut seat, the screw rod 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 are combined to form a ball channel, a plurality of balls are arranged in the ball channel, and the screw rod assembly further comprises the circulator. An installation position communicated with an inner cavity of the nut seat is arranged on the side face of the nut seat, a clamping groove is formed in the side wall of the installation position, the circulator is provided with a clamping portion, and after the circulator is arranged on the installation position from the outside of the nut seat, the clamping portion is connected with the clamping groove in a clamped mode.

Description

Technical Field

[0001] The utility model belongs to the technical field of ball screws, in particular to a screw assembly which is convenient for installing 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 installing 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 rod assembly that is convenient for installing a circulator, includes a screw rod and a nut seat, the screw rod is provided with a spiral groove 1, the nut seat is provided with a spiral groove 2, the spiral groove 1 and the spiral groove 2 are combined to form a ball channel, a plurality of balls are arranged in the ball channel, and also includes a circulator, the nut seat side is provided with a mounting position connected to its inner cavity, the mounting position side wall is provided with a clamping groove, the circulator is provided with a clamping part, after the circulator is placed in the mounting position from the outside of the nut seat, the clamping part is clamped with the clamping groove.

[0008] By adopting the above technical solution, by placing the circulator externally, the size, shape and material of the circulator can be adjusted according to specific application requirements, providing greater design flexibility and a simple structure. Moreover, since the circulator is externally placed, maintenance and replacement are more convenient.

[0009] Preferably, the circulator includes a limiting portion and a reversing portion, the clamping portion is installed on the limiting portion of the circulator, the limiting portion of the circulator passes through the mounting position of the nut seat and remains relatively fixed with the nut seat, and the reversing portion of the circulator is provided with a pipeline groove, when the circulator and the nut seat remain relatively fixed, the two end ports of the pipeline groove respectively correspond to different ball channels of the nut seat.

[0010] By adopting the above technical solution, the reversing part can control the balls to circulate in the nut seat.

[0011] Preferably, the clamping portion includes an elastic sheet and a buckle, one side of the elastic sheet is fixedly connected to the buckle, and when the limiting portion of the circulator is placed in the installation position, the buckle of the elastic sheet is clamped with the clamping slot; two through grooves are provided on both sides of the upper end of the limiting portion of the circulator, the elastic sheet is installed at the bottom of the through groove, and deformation space is provided on the side of the elastic sheet and the groove wall of the through groove.

[0012] By adopting the above technical solution, the circulator and the nut seat are easy to assemble and disassemble by a snap-on method, no additional tools or fasteners are required, and they can be assembled quickly and conveniently, and can achieve firm mechanical locking and provide a stable connection.

[0013] Preferably, gaps are provided between the side surfaces of the elastic sheet and the side walls of the through groove.

[0014] By adopting the above technical solution, the friction between the elastic sheet and the side groove wall of the through groove when the elastic sheet is deformed and moves can be reduced, thereby reducing manpower and improving convenience of use.

[0015] Preferably, the buckle is a triangular prism, which includes a first side surface and a second side surface, the first side surface of the triangular prism is fixedly connected to the elastic sheet, and the second side surface of the triangular prism is perpendicular to the first side surface of the triangular prism; the geometric shape of the card slot matches the triangular prism.

[0016] By adopting the above technical solution, the cooperation between the triangular prism and the card slot can provide higher structural stability, so that the buckle position has resistance in various directions to prevent loosening or falling off. The triangular prism helps to prevent rotation.

[0017] Preferably, the nut seat is provided with a dustproof pad, and the dustproof pad is installed at both ends of the inner ring wall of the nut seat, and the dustproof pad is relatively fixed to the nut seat through a connecting piece.

[0018] By adopting the above technical solution, the provision of a dustproof pad can keep the ball clean and tidy, extend the service life of the ball, and thus extend the service life of the ball screw.

[0019] Preferably, the connecting member includes an elastic protrusion, one end of which is fixedly connected to the dustproof pad, and the nut seat is provided with a limiting cylinder. When the dustproof pad and the nut seat are relatively fixed, the elastic protrusion is clamped with the limiting cylinder.

[0020] By adopting the above technical solution, accurate positioning can be achieved, the assembly process is simplified, and the elastic protrusion is used to complete the relative fixation between the dustproof pad and the nut seat, which also has a shock-proof effect and enhances the buffering performance of the dustproof pad.

[0021] Preferably, there are a plurality of circulators, and the plurality of circulators are staggered.

[0022] By adopting the above technical solution, a plurality of circulators are provided, which can increase the number of balls and better reduce the friction between the screw and the nut seat.

[0023] Beneficial effects of the utility model:

[0024] 1. The screw assembly of the circulator is convenient for installation in the present application. By placing the circulator externally, the size, shape and material of the circulator can be adjusted according to specific application requirements, providing greater design flexibility, simple structure, and because the circulator is external, maintenance and replacement are more convenient;

[0025] 2. The screw assembly of the circulator in the present application is easy to install by adopting a snap-on method to make the circulator and the nut seat easy to assemble and disassemble, without the need for additional tools or fasteners, and can be assembled quickly and conveniently;

[0026] 3. The screw rod assembly of the present application is convenient for installing the circulator by providing gaps between the side surfaces of the elastic sheet and the side walls of the through slot, which can reduce the friction between the elastic sheet and the side walls of the through slot when the elastic sheet is deformed and moves, thereby reducing manpower and improving ease of use.

[0027] Other features and advantages of the present invention will be described in detail in the subsequent specific implementation section. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 : Schematic diagram of the overall structure of the utility model.

[0029] Figure 2 : The structural diagram of the circulator of the utility model.

[0030] Figure 3 : Exploded view of the overall structure of the utility model.

[0031] Figure 4 : The utility model omits the exploded structural diagram of a partial screw.

[0032] Figure 5 : The utility model Figure 4 Enlarged view of part A.

[0033] Figure numerals: 1. screw; 2. nut seat; 3. circulator; 31. limiting portion; 32. reverse portion; 4. mounting position; 5. pipe groove; 6. through groove; 7. elastic sheet; 8. deformation space; 9. gap; 10. buckle; 11. slot; 12. dustproof pad; 13. elastic protrusion; 14. limiting cylinder. DETAILED DESCRIPTION

[0034] 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.

[0035] Please refer to Figure 1-5 ;

[0036] The present application discloses a screw assembly which is convenient for installing a circulator, comprising a screw 1, a nut seat 2, a circulator 3 and a ball. The screw 1 is provided with a spiral groove, the nut seat 2 is provided with a bolt groove 2, the spiral groove 1 and the spiral groove 2 form a ball channel for placing the ball, and the ball is mostly made of steel balls to better reduce friction and improve durability; the screw 1 passes through the nut seat 2, and the screw 1 and the nut seat 2 move relative to each other through the rolling of the ball; the nut seat 2 is provided with a mounting position 4 which is connected to its inner cavity on the side, and the shape of the mounting position 4 is not limited in this embodiment. In the embodiment, a card slot 11 is provided on the side wall of the mounting position 4, and the mounting position 4 fixes the circulator 3 through the card slot 11 to ensure that the circulator 3 remains stable during operation. The side wall of the mounting position 4 is precisely processed and coated with a layer of anti-corrosion material to improve durability and service life. The mounting position 4 is connected to the external shell through an opening to facilitate the insertion and removal of the circulator 3; the circulator 3 includes a card connection portion. When the circulator 3 is inserted into the mounting position 4 from the outside of the nut seat 2, the circulator and the nut seat 2 remain relatively fixed, and the card connection portion is card-connected with the card slot 11.

[0037] Specifically, in practical applications, the circulator 3 first needs to be inserted from the outside of the nut seat 2 through the mounting position 4 into the inside of the nut seat 2. During this process, the operator needs to ensure that the position and angle of the circulator 3 are correct so that the snap-on portion of the circulator 3 can be accurately aligned with the snap-on slot 11 on the nut seat 2. Once aligned correctly, the snap-on portion of the circulator 3 will be firmly snapped into the snap-on slot 11 to achieve a tight connection, which can maintain a stable and firm relative fixed state between the circulator 3 and the nut seat 2 to avoid loosening or misalignment during operation.

[0038] In the initial state, the nut seat 2 is installed on the screw 1, and the ball is located in the ball channel. When the screw 1 is driven to rotate by a motor or other power device, the spiral groove on the screw 1 generates a thrust, pushing the ball to roll along the ball channel in the nut seat 2; when the ball rolls between the screw 1 and the ball channel of the nut seat 2, the rolling friction coefficient of the ball is much smaller than the sliding friction coefficient, which makes the ball screw very efficient and can efficiently convert rotational motion into linear motion.

[0039] Assuming that long-term use makes the ball surface dry and causes excessive friction, the operator can manually clamp the circulator 3 to drive the buckle 10 to disengage from the slot 11. At this time, the operator can take the circulator 3 out of the installation position 4, and then pour the lubricating oil from the installation position 4 connected to the inner cavity of the nut seat 2 into the inner cavity of the nut seat 2. The operator can then clamp the circulator 3 and place the circulator 3 in the installation position 4, thereby loosening the circulator 3. At this time, the clamping part is engaged with the slot 11.

[0040] The circulator 3 includes a limiting portion 31 and a reversing portion 32. The clamping portion is installed on the limiting portion 31 of the circulator 3. The limiting portion 31 of the circulator 3 is used to remain relatively fixed with the nut seat 2. The reversing portion 32 of the circulator 3 is provided with a pipe groove 5. When the ball rolls to one port of the reversing portion 32 of the circulator 3, the ball will enter the channel in the circulator 3. The circulator 3 will change the movement direction of the ball, so that it circulates from one port of the reversing portion 32 back to the other port of the reversing portion 32, thereby continuing to roll in the ball channel of the nut seat 2, so that the ball can circulate continuously between the screw 1 and the nut seat 2, ensuring that the system can work long-term and stably.

[0041] The ball screw can be used in CNC machine tools, automation equipment, high-precision guidance and positioning systems in aerospace, etc., and this embodiment is not limited here.

[0042] It is worth noting that, in the present embodiment, there are several circulators 3 , and the staggered arrangement of the several circulators 3 can increase the number of balls and better reduce the friction between the screw 1 and the nut seat 2 .

[0043] Specifically, in this embodiment, the shape of the clamping portion is not limited, and the structure of one of the clamping portions is described below as an example:

[0044] The clamping part includes at least one elastic sheet 7 and a buckle 10. Two through grooves 6 are provided on both sides of the upper end of the limiting part 31 of the circulator 3. The bottoms of the two through grooves 6 are respectively connected to the two elastic sheets 7. The side surfaces of the elastic sheet 7 and the groove walls of the through grooves 6 are provided with deformation spaces 8, and gaps 9 are left between the side surfaces of the elastic sheet 7 and the groove walls of the through grooves 6, so that the elastic sheet 7 can be deformed; a buckle 10 is provided on the side of the elastic sheet 7 facing the nut seat 2. The buckle 10 is a triangular prism, which includes a first side surface and a second side surface. The first side surface of the triangular prism is fixedly connected to the elastic sheet 7, and the second side surface of the triangular prism is perpendicular to the first side surface of the triangular prism; the geometric shape of the clamping groove 11 provided at the mounting position 4 of the nut seat 2 matches that of the triangular prism. When the limiting part 31 of the circulator 3 is placed in the mounting position 4, the buckle 10 of the elastic sheet 7 is clamped with the clamping groove 11.

[0045] Assuming that long-term use causes excessive friction of the ball and requires replacement, the operator can manually clamp the elastic sheets 7 on both sides of the circulator 3 so that the elastic sheets 7 are deformed by force. The elastic sheets 7 are deformed and bend toward the deformation space 8, which can drive the buckle 10 to disengage from the slot 11. At this time, the operator can take the circulator 3 out of the installation position 4, and then pour the ball to be replaced out of the ball channel; then place the new ball in the ball channel through the installation position 4 connected to the inner cavity of the nut seat 2, and then the operator can clamp the circulator 3 to deform the elastic sheet 7, and then place the circulator 3 with the deformed elastic sheet 7 in the installation position 4, thereby loosening the elastic sheet 7. The elastic sheet 7 returns to its original shape under the action of the elastic force, and at this time the clamping part is clamped with the slot 11.

[0046] In order to further enhance the dustproof function of the ball screw, the nut seat 2 is provided with a dustproof pad 12, which is installed at both ends of the inner ring wall of the nut seat 2, and the dustproof pad 12 is relatively fixed to the nut seat 2 through a connecting piece. The connecting piece includes an elastic protrusion 13, one end of which is fixedly connected to the dustproof pad 12, and the nut seat 2 is provided with a limiting cylinder 14. When the dustproof pad 12 is relatively fixed to the nut seat 2, the elastic protrusion 13 passes through the limiting cylinder 14. By adopting the above technical solution, the dustproof pad 12 can keep the ball clean and tidy, extend the service life of the ball, and thus extend the use time of the ball screw. The elastic protrusion 13 is used to complete the relative fixation between the dustproof pad 12 and the nut seat 2, and it also has a shockproof effect, which enhances the buffering performance of the dustproof pad 12.

[0047] 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.

[0048] 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 facilitating installation of a circulator, comprising a screw (1) and a nut seat (2), wherein the screw (1) is provided with a first spiral groove, and the nut seat (2) is provided with a second spiral groove, wherein the first spiral groove and the second spiral groove are combined to form a ball channel, wherein a plurality of balls are arranged in the ball channel, and wherein: The circulator (3) is also included. A mounting position (4) communicating with the inner cavity of the nut seat (2) is provided on the side surface thereof. A clamping groove (11) is provided on the side wall of the mounting position (4). The circulator (3) is provided with a clamping portion. After the circulator (3) is placed on the mounting position (4) from the outside of the nut seat (2), the clamping portion is clamped with the clamping groove (11).

2. A screw assembly for facilitating installation of a circulator according to claim 1, characterized in that: The circulator (3) comprises a limiting portion (31) and a reverse portion (32); the clamping portion is mounted on the limiting portion (31) of the circulator (3); the limiting portion (31) of the circulator (3) passes through the mounting position (4) of the nut seat (2) and remains relatively fixed with the nut seat (2); the reverse portion (32) of the circulator (3) is provided with a pipeline groove (5); when the circulator (3) and the nut seat (2) remain relatively fixed, the two end ports of the pipeline groove (5) respectively correspond to different ball channels.

3. A screw assembly for facilitating installation of a circulator according to claim 1 or 2, characterized in that: The clamping portion comprises an elastic sheet (7) and a buckle (10), one side of the elastic sheet (7) is fixedly connected to the buckle (10), and when the limiting portion (31) of the circulator (3) is placed in the installation position (4), the buckle (10) of the elastic sheet (7) is clamped with the clamping groove (11); two through grooves (6) are provided on both sides of the upper end of the limiting portion (31) of the circulator (3), the elastic sheet (7) is installed at the bottom of the through groove (6), and the side of the elastic sheet (7) and the through groove (6) are provided with a deformation space (8).

4. A screw assembly for facilitating installation of a circulator according to claim 3, characterized in that: Gaps (9) are provided between the side surfaces of the elastic sheet (7) and the groove walls of the through groove (6).

5. A screw assembly for facilitating installation of a circulator according to claim 4, characterized in that: The buckle (10) is a triangular prism, which includes a first side surface and a second side surface. The first side surface of the triangular prism is fixedly connected to the elastic sheet (7), and the second side surface of the triangular prism is perpendicular to the first side surface of the triangular prism. The geometric shape of the card slot (11) matches that of the triangular prism.

6. A screw assembly for facilitating installation of a circulator according to claim 1, characterized in that: The nut seat (2) is provided with a dustproof pad (12), and the dustproof pad (12) is installed at both ends of the inner ring wall of the nut seat (2). The dustproof pad (12) is relatively fixed to the nut seat (2) through a connecting piece.

7. A screw assembly for facilitating installation of a circulator according to claim 6, characterized in that: The connecting piece comprises an elastic protrusion (13), one end of which is fixedly connected to the dustproof pad (12); the nut seat (2) is provided with a limiting cylinder (14); when the dustproof pad (12) and the nut seat (2) are relatively fixed, the elastic protrusion (13) is clamped with the limiting cylinder (14).

8. A screw assembly for facilitating installation of a circulator according to claim 1, characterized in that: There are a plurality of circulators (3), and the plurality of circulators (3) are arranged in a staggered manner.

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