TWI458903B - Ball screw with dustproof device - Google Patents

Description

Ball screw with dustproof device

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

Referring to FIG. 1 , it is a combination view of the dustproof member and the nut of the prior art. The dustproof member (1) is a thin annular body, and a positioning portion is convexly formed on the outer surface of the annular outer edge ( 11) The annular inner surface is provided with a dust-proof convex portion (not shown) protruding from the rolling groove of the screw, and the dust-proof convex portion is used for scraping foreign objects on the surface of the screw or preventing foreign matter from invading the inside of the nut. When the dustproof member (1) is attached to the both end faces of the nut (2), the positioning portion (11) is embedded in the positioning groove (21) provided by the nut (2), and the positioning portion (11) The cooperation with the positioning groove (21) is used to limit the degree of freedom of rotation of the dustproof member (1), but the configuration of the structure has the following problems: the length of the nut (2) of the ball screw is different depending on the needs of the user. When the length of the nut (2) is changed, the position of the positioning groove (21) is changed to other positions, such as the position of the positioning groove (21x), but the position of the dustproof convex portion and the positioning portion (11) It is invariable. In order to allow the dust-proof projection to be inserted into the rolling groove of the screw and to cooperate with the positioning groove (21), it must be before the nut (2) is processed. Calculating the position of the positioning groove (21) is very time consuming, and if the nut (2) is inaccurately processed or the positioning portion (11) of the dustproof member (1) has an error, the two cannot be matched. Causing the workpiece Retirement, so that the cost is increased, so the structure of the dustproof member (1) and the nut (2) is still necessary for improvement.

Based on the problems of the above-mentioned conventional techniques, the inventors of the present invention have succeeded in research and development, and the inventions which can achieve the object of the following inventions are finally born.

That is, the primary object of the present invention is to develop a dustproof device that can be applied to various nut lengths.

In order to achieve the above object, the present invention is a ball screw with a dustproof device, comprising: a screw having a long strip structure with a spiral rolling groove on the outer edge surface; a nut having a nut for providing The through hole of the screw sleeve is provided with a rolling groove opposite to the rolling groove, the rolling groove and the rolling groove system form a load path, and the two ends of the nut are respectively provided with a mounting groove; a plurality of rolling elements are disposed on the load path; a reflow element is disposed on the nut to provide the rolling body circulation; and the dustproof device comprises a fixing member and a dustproof member, wherein the fixing member and the dustproof member are annular The fixing member is provided with a receiving portion and a positioning groove on the inner ring surface, the receiving portion is annular, and the receiving portion and the positioning groove are in communication with each other, and the fixing member is fixed to the nut The dust-proof member has a dust-proof convex portion protruding from the rolling groove on the inner ring surface, and the dust-proof member has a positioning portion protruding from the outer ring surface, and the dust-proof member is disposed in the receiving portion of the fixing member The positioning portion is embedded in the positioning groove.

In order to further understand the features and technical aspects of the present invention, reference should be made to the description of the embodiments of the present invention and the accompanying drawings. .

Prior art

(1) ‧‧‧Dustproof parts

(11)‧‧‧ Positioning Department

(2)‧‧‧ Nuts

(21, 21X) ‧ ‧ positioning slot

this invention

(1)‧‧‧ screw

(11) ‧ ‧ rolling groove

(2)‧‧‧ Nuts

(21)‧‧‧Perforation

(211)‧‧‧ rolling trough

(22)‧‧‧ screw holes

(23)‧‧‧Installation slots

(3) ‧‧‧Reflux components

(31) ‧‧‧ Return Road

(4) ‧‧‧Fixed parts

(41) ‧‧‧ accommodating department

(42) ‧‧‧ positioning slots

(5) ‧‧‧Dustproof parts

(51)‧‧‧Dust projections

(52) ‧ ‧ Positioning Department

(G)‧‧‧ screws

(90)‧‧‧Load path

Figure 1 is a combined end view of a dust-proof member and a nut of the prior art.

Figure 2 is an exploded view of the ball screw with the dustproof device of the present invention.

Figure 3 is a combination view of the dustproof device and the nut of the present invention.

Figure 4 is a combination view of the ball screw with the dustproof device of the present invention.

Figure 5 is a cross-sectional view of the ball screw of the dustproof device of the present invention in the axial direction.

Figure 6 is a cross-sectional view of the ball screw with the dustproof device of the present invention in the radial direction.

BRIEF DESCRIPTION OF THE DRAWINGS A preferred embodiment of the present invention will be further described with reference to the accompanying drawings, in which: FIG. 2 is an exploded view of a ball screw having a dustproof device according to the present invention.

Figure 3 is a combination view of the dustproof device and the nut of the present invention.

Figure 4 is a combination view of the ball screw with the dustproof device of the present invention.

Figure 5 is a cross-sectional view of the ball screw of the dustproof device of the present invention in the axial direction.

Figure 6 is a cross-sectional view of the ball screw with the dustproof device of the present invention in the radial direction.

Referring to FIG. 2 to FIG. 6 , the present invention is a ball screw with a dustproof device, which comprises: a screw (1), which is a long strip structure. The rim surface is provided with a spiral rolling groove (11); a nut (2) is provided with a through hole (21) for the screw (1), and the inner edge surface of the hole (21) is opposite to the a rolling groove (211) of the rolling groove (11), the rolling groove (11) and the rolling groove (211) form a load path, and the two ends of the nut (2) are respectively provided with a mounting groove (23) and a plurality of screw holes (22), wherein the mounting groove (23) is in communication with the screw hole (22); A plurality of rolling elements (not shown) are disposed on the load path; a reflow element (3) is disposed on the nut (2) to provide the rolling element circulation, and the reflow element (3) in the embodiment is two pieces Each of the reflow elements (3) is provided with a return passage (31), and the return passage (31) is a return hole of the nut (2) (not shown) Constituting a circulation path, the two ends of the circulation path are respectively connected with the two ends of the load path (90) to form a complete circulation path; the dustproof device comprises a fixing member (4) and a dustproof member (5), The fixing member (4) and the dustproof member (5) are both annular structures. The fixing member (4) is provided with a receiving portion (41) and a positioning groove (42) on the inner ring surface, and the receiving portion (41) In the embodiment, the annular groove may be an L-shaped groove, and the receiving portion (41) and the positioning groove (42) are in communication with each other, and the fixing member (4) is fixed to the installation. The dust-proof member (5) is provided with a dust-proof convex portion (51) protruding from the rolling groove (11) on the inner ring surface, and the dust-proof member (5) has a positioning portion protruding from the outer ring surface ( 52) The dustproof member (5) is disposed in the receiving portion (41), and the positioning portion (52) is embedded in the fixing portion Positioning groove (42); after the fixing member (4) and the dustproof member (5) are installed, the fixing member (4) can be mounted to the mounting groove (23), and the screw (G) is screwed to The screw hole (22) is such that one end of the screw (G) abuts against the outer ring surface of the fixing member (4) (as shown in FIG. 5), and the fixing member (4) is fixed to the nut (2) The dust-proof convex portion (51) of the dustproof member (5) is embedded in the rolling groove (11) to achieve a dustproof effect.

Therefore, according to the arrangement of the fixing member, the nut does not need to be processed any structure and the dustproof member, so that the structural design of the nut and the dustproof member is not affected by the change of the length of the nut. Increase versatility and speed up design and The efficiency of manufacture is to reduce costs, and the present invention has improved the problems of the prior art.

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.

(2)‧‧‧ Nuts

(3) ‧‧‧Reflux components

(4) ‧‧‧Fixed parts

(42) ‧‧‧ positioning slots

(5) ‧‧‧Dustproof parts

(52) ‧ ‧ Positioning Department

Claims (1)

A ball screw with a dustproof device comprises: a screw having a long strip structure with a spiral rolling groove on an outer edge surface; and a nut having a perforation for the screw sleeve, the perforation The inner edge surface is provided with a rolling groove opposite to the rolling groove, the rolling groove and the rolling groove system form a load path, and the two ends of the nut are respectively provided with a mounting groove; the plurality of rolling elements are disposed on the load path The reflow element is disposed on the nut to provide the rolling body circulation; the dustproof device comprises a fixing member and a dustproof member, and the fixing member and the dustproof member are both annular structures, and the fixing member is on the inner ring surface An accommodating portion is disposed in the annular shape, and the accommodating portion is in communication with the locating groove. The fixing member is fixed to the mounting groove, and the dustproof member is disposed on the inner ring surface. a snail protruding from the dust-proof convex portion of the rolling groove, wherein the dust-proof member has a positioning portion protruding from the outer ring surface, the dust-proof member is disposed on the accommodating portion, and the positioning portion is embedded in the positioning groove; The cap is further provided with a screw hole, and the screw hole is connected with the mounting groove, the screw System for a screw is screwed wherein one end of the screw fixing member abuts against the outside of the torus.