TWI504824B - Spline ball screw with dustproof device - Google Patents

Description

Spline ball screw with dustproof device

The invention relates to a transmission component, in particular to a spline ball screw with a dustproof device.

As disclosed in Japanese Patent No. 2012-2309, it is a spline ball screw commonly known in the industry. This product is widely used in the robot industry, and because of the large variation of the environment in which the robot is located, especially the spline ball screw is damaged. The main reason is the intrusion of dust or foreign matter, which causes the spline ball screw to not circulate smoothly, but it is stuck and cannot be activated. Therefore, the spline ball screw must be dust-proof, but the conventional technique is used for spline. The two nuts in the ball screw are not provided with a dustproof device, so that the spline ball screw does not operate smoothly and shortens the service life, so it is necessary to improve.

In order to improve the above problems, an object of the present invention is to develop a dustproof device which can be used for a spline ball screw.

In order to achieve the above object, the present invention is a spline ball screw with a dustproof device, comprising: a long shaft extending in a direction into an elongated structure defining the extending direction as an axial direction, the long axis The outer surface is provided with a plurality of straight grooves extending in the direction of the plurality of axes, and an outer spiral groove interlaced with the outer straight grooves; the continuous groove nut group is disposed on the long axis and is disposed opposite to the outer straight groove Straight groove, between the outer and inner straight grooves a plurality of rolling elements; a spiral groove nut group is disposed on the long axis, and is provided with an inner spiral groove opposite to the outer spiral groove, and a plurality of rolling elements are disposed between the outer and inner spiral grooves; The device is installed in the straight groove nut group, and the first dustproof device comprises a straight groove fixing member and a spiral groove dustproof member, wherein the straight groove fixing member is provided with a convex protrusion protruding toward the outer straight groove The spiral groove dustproof member is provided with a spiral convex portion protruding toward the outer spiral groove. When the straight groove nut group rotates or moves relative to the long axis, the straight groove fixing member and the spiral groove dustproof member The second dustproof device is mounted on the spiral groove nut group, and the second dustproof device comprises a spiral groove fixing member and a straight groove dustproof member, wherein the spiral groove fixing member is provided with the outer spiral a spiral protrusion formed by the groove, the straight groove dustproof member is provided with a protrusion protruding toward the outer straight groove, and the spiral groove is fixed when the spiral groove nut group rotates or moves relative to the long axis The piece rotates relative to the straight groove dustproof member.

1‧‧‧ long axis

11‧‧‧Outer spiral groove

12‧‧‧Outer straight groove

2‧‧‧ Straight groove nut group

21‧‧‧ first nut

211‧‧‧ 直直沟

22‧‧‧First reflow

23‧‧‧First outer nut

24‧‧‧ rolling elements

25‧‧‧ rolling elements

26‧‧‧Dust-proof parts

27‧‧‧First dustproof device

271‧‧‧ Straight groove fixings

2711‧‧‧Perforation

2712‧‧‧Bumps

2713‧‧‧Mounting holes

2714‧‧‧ 容 部

272‧‧‧Spiral ditch dustproof parts

2721‧‧‧through hole

2722‧‧‧Spiral convex

2723‧‧‧Slip surface

273‧‧‧Rolling parts

2731‧‧‧ balls

2732‧‧‧ Holder

3‧‧‧Spiral groove nut group

31‧‧‧ second nut

32‧‧‧Second reflow

33‧‧‧Fixed parts

34‧‧‧Second outer nut

35‧‧‧Dust-proof parts

36‧‧‧Second dustproof device

361‧‧‧Spiral groove fixture

3611‧‧‧Perforation

3612‧‧‧Spiral convex

3613‧‧‧Mounting holes

3614‧‧‧ 容部

362‧‧‧ Straight ditch dustproof parts

3621‧‧‧through hole

3622‧‧‧Bumps

3623‧‧‧Slip surface

363‧‧‧Rolling parts

3631‧‧‧ balls

3632‧‧‧ Holder

37‧‧‧ rolling elements

38‧‧‧ rolling elements

X‧‧‧axis direction

The first figure is a perspective view of a spline ball screw with a dustproof device of the present invention.

The second figure is a system exploded view of the spline ball screw with the dustproof device of the present invention.

The third figure is a system exploded view of the spline ball screw with the dustproof device of the present invention.

The fourth figure is a system diagram of the dustproof device installed in the spiral groove nut group of the present invention.

The fifth figure is a system diagram of the dustproof device installed in the straight groove nut group of the present invention.

The sixth figure is a cross-sectional view of the spline ball screw with the dustproof device of the present invention, which is a spiral groove nut group and a long shaft.

Figure 7 is a cross-sectional view 1 of the spline ball screw with the dustproof device of the present invention, It is a straight groove nut group and a long shaft.

Please refer to the first to fifth figures, which are the combination and system diagram of the spline ball screw with the dustproof device of the present invention. The spline ball screw system with the dustproof device comprises: a long shaft (1), straight a groove nut group (2) and a spiral groove nut group (3); when the spline ball screw is applied, the power source is used to drive the straight groove nut group (2) and the spiral groove nut group (3). The long shaft (1) is driven to rotate or linearly to be applied to the robot or other requirements, so the outer straight groove (12) and the outer spiral groove (11) of the long shaft (1) must be considered in the design of the dustproof device. Both need to be dustproof at the same time, and the dustproof device will interfere when the straight groove nut group (2) and the spiral groove nut group (3) are driven by the driving source. How to solve this problem is as follows: The shaft (1) is elongated into a long strip structure in one direction, and the extending direction is defined as an axial direction (X), and the outer surface of the long axis (1) is provided with a straight groove (12) extending in a plurality of axial directions, and An outer spiral groove (11) interleaved with the outer straight groove (12); the straight groove nut group (2) includes a first nut (21), a first reflow member (22), and a first outer screw Cap (23 a plurality of rolling elements (24, 25), a dustproof member (26), and a first dustproof device (27), the first nut (21) is threaded through the long axis (1) and provided with respect to the outer shaft An inner straight groove (211) of the straight groove (12), a plurality of rolling elements (25) are disposed between the outer straight groove (12) and the inner straight groove (211), and the first returning member (22) is installed on The first nut (21) is provided and the rolling body (25) is circulated and recirculated; the first outer nut (23) is sleeved on the first nut (21), and the two nuts are arranged between the two nuts Have complex a plurality of rolling elements (25), wherein the dustproof member (26) is disposed at both ends of the first nut (21) and the first outer nut (23) to prevent foreign matter from entering; the first dustproof The device (27) is mounted on the first nut (21), and the first dustproof device (27) comprises a straight groove fixing member (271) and a spiral groove dustproof member (272), and the straight groove fixing member (271) is disposed at two ends of the first nut (21), and is screwed to the first nut (21) and protrudes against the straight groove fixing member (271) to limit the The straight groove fixing member (271) has a displacement degree of freedom; the straight groove fixing member (271) is provided with a through hole (2711) and a plurality of mounting holes (2713), and the through hole (2711) has a convex toward the outer straight groove (12) a protruding block (2712) and a receiving portion (2714) are disposed at an angle to the outer surface of the straight groove fixing member (271) and connected to the receiving portion (2714) The spiral groove dust-proof member (272) is received in the accommodating portion (2714) and rotatable relative to the accommodating portion (2714), and the spiral groove dust-proof member (272) is provided with a through hole (2721) And a sliding surface (2723) facing the through hole (2721), the inner edge surface of the through hole (2721) has a spiral convex portion (2722) protruding toward the outer spiral groove (11); the dustproof structure (spiral convex portion and convex portion) of the spiral groove dustproof member (272) and the straight groove fixing member (271) is directed to the outer straight The groove (12) and the outer spiral groove (11) are sealed and dustproof, so when the straight groove nut group (2) rotates or moves relative to the long axis (1), the spiral groove dustproof member (272) and the straight The groove fixing member (271) has different degrees of freedom of restraint, so that the spiral groove dustproof member (272) and the straight groove fixing member (271) are relatively rotated, so that the foreign matter can be prevented from being detached by the outer straight groove (12). And the outer spiral groove (11) enters the straight groove nut group (2), and the straight groove nut group (2) can be driven by the power source without the problem of unsatisfactory operation. According to the seventh embodiment, in the embodiment, in order to make the rotation between the straight groove fixing member (271) and the spiral groove dustproof member (272) smoother, the mounting hole (2713) is provided. There is a rolling member (273) which is composed of a ball (2731) and a holding member (2732) which holds the ball (2731) but maintains the rotation of the ball (2731) The degree of freedom, and the ball (2731) is in contact with the sliding surface (2723). In the embodiment, the sliding surface (2723) has a V-shaped cross section, so that the spiral groove dustproof member can be restrained ( 272) The axial direction (X) degree of freedom can be rotated relative to the straight groove fixing member (271); a spiral groove nut group (3) includes a second nut (31) and a second returning member ( 32), a fixing member (33), a second outer nut (34), a plurality of rolling elements (37, 38), a dustproof member (35), and a second dustproof device (36), the second nut (31) It is disposed on the long axis (1) and is provided with an inner spiral groove (311) opposite to the outer spiral groove (11), and a plurality of rolling elements are disposed between the outer spiral groove (11) and the inner spiral groove (311). (38), the second reflow member (32) is pressed by the fixing member (33) The second nut (31) is disposed, and the rolling body (38) is provided to circulate and recirculate; the second outer nut (34) is sleeved on the second nut (31), and between the two nuts A plurality of rolling elements (37) are disposed, and the dustproof member (35) is disposed at both ends of the second nut (31) and the second outer nut (34) to prevent foreign matter from entering; The second dustproof device (36) is mounted on the second nut (31), and the second dustproof device (36) comprises a spiral groove fixing member (361) and a straight groove dustproof member (362), the spiral The groove fixing member (361) is disposed at two ends of the second nut (31), and can be screwed to the second nut (31) And protrudingly resisting the spiral groove fixing member (361) to limit the degree of freedom of displacement of the spiral groove fixing member (361); the spiral groove fixing member (361) is provided with a through hole (3611) and a plurality of mounting holes (3613) The perforation (3611) has a spiral protrusion (3612) protruding toward the outer spiral groove (11) and a receiving portion (3614), and the spiral protrusion (3612) is received in the outer spiral In the groove (11), the mounting hole (3613) is distributed at an angle to the outer surface of the spiral groove fixing member (361) and communicates with the receiving portion (3614); the straight groove dustproof member (362) is The straight groove dustproof member (362) is provided with a through hole (3621) and a sliding surface (3623) facing the through hole (3621), the through hole (3621) The inner edge surface has a protrusion (3622) protruding toward the outer straight groove (12); the dustproof structure of the straight groove dustproof member (362) and the spiral groove fixing member (361) (spiral convex portion and convex portion) The dust is shielded against the outer straight groove (12) and the outer spiral groove (11), so when the spiral groove nut group (3) rotates or moves relative to the long axis (1), the straight groove dustproof member (362) ) the degree of freedom in which the spiral groove fixing member (361) is restrained is different, so The straight groove dustproof member (362) rotates relative to the spiral groove fixing member (361), so that the foreign matter can be prevented from entering the spiral groove nut group from the outer spiral groove (11) and the outer straight groove (12) (3) Moreover, the spiral groove nut group (3) can be driven by the power source without the problem of unsmooth operation; as described above, please refer to the sixth figure, in this embodiment, in order to make the spiral groove fixing member ( 361) The rotation between the straight groove dustproof member (362) is smoother. Therefore, the mounting hole (3613) is provided with a rolling member (363), and the rolling member (363) is composed of a ball (3631) and a holding member. (3632) constituting that the holder (3632) holds the ball (3631) but maintains the ball (3) 631) the degree of freedom of rotation, and the ball (3631) is in contact with the sliding surface (3623). In the embodiment, the sliding surface (3623) has a V-shaped cross section, so that the straight line can be restrained. The axial direction (X) degree of freedom of the groove dust member (362) in turn allows it to rotate relative to the spiral groove fixing member (361).

In view of the above, the "industrial availability" of the present invention should be unquestionable. In addition, the feature technology disclosed in the embodiment of the present invention has not been seen in publications before the application, nor has it been disclosed. The use of not only has the fact that the effect is improved as described above, but also has an additional effect that cannot be neglected. Therefore, the "novelty" and "progressiveness" of the present invention are in compliance with the patent regulations, and the application for the invention patent is filed according to law. Please give us a review and grant a patent as soon as possible.

The above description of the embodiments is intended to be illustrative of the invention and is not intended to limit the scope of the invention.

36‧‧‧Second dustproof device

361‧‧‧Spiral groove fixture

3611‧‧‧Perforation

3612‧‧‧Spiral convex

3613‧‧‧Mounting holes

3614‧‧‧ 容部

362‧‧‧ Straight ditch dustproof parts

3621‧‧‧through hole

3622‧‧‧Bumps

3623‧‧‧Slip surface

363‧‧‧Rolling parts

3631‧‧‧ balls

3632‧‧‧ Holder

Claims (3)

A spline ball screw with a dustproof device, comprising: a long shaft extending in a direction into an elongated structure, wherein the extending direction is an axial direction, and the outer surface of the long shaft is extended by a plurality of axial directions a straight groove and an outer spiral groove which is alternately arranged with the outer straight groove; the straight groove nut group is disposed on the long axis, and is provided with an inner straight groove opposite to the outer straight groove, and the outer and inner straight grooves are a plurality of rolling elements are disposed between the plurality of rolling elements; a spiral groove nut group is disposed on the long axis, and is provided with an inner spiral groove opposite to the outer spiral groove, and a plurality of rolling elements are disposed between the outer and inner spiral grooves; A dustproof device is disposed in the straight groove nut group, and the first dustproof device comprises a straight groove fixing member and a spiral groove dustproof member, wherein the straight groove fixing member is provided with a protruding toward the outer straight groove a convex block, the spiral groove dustproof member is provided with a spiral convex portion protruding toward the outer spiral groove, and the straight groove fixing member and the spiral groove are arranged when the straight groove nut group rotates or moves relative to the long axis The dustproof member is relatively rotated; the second dustproof device is mounted on the spiral groove nut group, the second The dust device comprises a spiral groove fixing member and a straight groove dustproof member, wherein the spiral groove fixing member is provided with a spiral convex portion protruding toward the outer spiral groove, and the straight groove dustproof member is provided with convex toward the outer straight groove And a protruding block, wherein the spiral groove fixing member rotates relative to the straight groove dustproof member when the spiral groove nut group rotates or moves relative to the long axis. The spline ball screw with a dustproof device according to claim 1, wherein the spiral groove fixing member and the straight groove fixing member are provided with a plurality of mounting holes, and the mounting holes are distributed at an angle to the spiral groove fixing member and An outer surface of the straight groove fixing member, the mounting hole is provided with a rolling member, the rolling member is composed of a ball and a holding member, the holding member holds the ball but maintains the rotational freedom of the ball, and the ball is in contact with the ball Spiral groove dustproof The slip surface of the piece and the straight groove dustproof piece. The spline ball screw with a dustproof device according to claim 1, wherein the sliding surface has a V-shaped cross section.