CN202056268U

CN202056268U - Scraper of ball screw

Info

Publication number: CN202056268U
Application number: CN2011201402051U
Authority: CN
Inventors: 李文昇
Original assignee: Individual
Current assignee: Individual
Priority date: 2011-05-05
Filing date: 2011-05-05
Publication date: 2011-11-30
Anticipated expiration: 2021-05-05

Abstract

The utility model discloses a scraper of a ball screw. The scraper is a circular ring-shaped body and is assembled at both end faces of a nut; one end of the inner wall face of the scraper is provided with a convex ring raised in the radial direction; the internal diameter of the convex ring is the +/-5 percent of the difference of the external diameter of the screw and 1/10 the diameter of a ball; a convex part extends at one side of the inner edge of the convex ring in the manner of center shifting; and the offset of the convex part is 1/6-2/1 of the diameter of the ball. Thereby, close fit of proper compression is formed between the scraper and the peripheral face of the screw as well as the spiral groove, and interference is not generated, so that a scraping action is more reliable and smooth.

Description

The scraping brushing device of ball screw

Technical field

The utility model relates to a kind of ball screw member that is applied to linear transmission, particularly a kind of scraping brushing device that makes the ball screw of wiper effect promoting.

Background technique

Usually, the design that needs Control work platform or processing assembly to move is often arranged in the precision optical machinery, and in order accurately and with the friction coefficient to control the mobile amount of feed, should move and all utilize ball screw to carry out accurate transmission, and ball screw is provided with a screw rod and a nut, therefore using between this screw rod and nut for the generation of the power of reducing friction has a plurality of balls to cooperate, and the circulating rolling that ball must be able to repeat in nut, this circulating rolling are that utilization is provided with the circulatory system and finishes on nut.

And this ball screw in use, for having avoided foreign matters such as bits slag or dust, gap between screw rod and nut enters nut inside, interfere the ball that rolls in the nut, have some setbacks when ball is rolled, therefore establish a scraping brushing device in each group of both ends of the surface of nut, this scraping brushing device is circular, its center has an axis hole, and inner wall surface thereof is formed with the fin of radial protrusion, and this fin can be embedded in the spiral grooves of screw rod; But, though the scraping brushing device tool of prior art strikes off the function of foreign matter such as bits slag or dust on the screw rod, the circumferential surface of screw rod and supporting in the spiral chute but this scraping brushing device can't suitably be conflicted usually, not being the space to occur, occurring urgent state exactly, is not desirable state for ball screw, because in case the space occurs, the effect of scraping foreign matters such as debris removal slag or dust is just bad, otherwise urgent state then will cause ball screw to rotate the situation that has some setbacks of being obstructed.

The model utility content

Because the scraping brushing device of the ball screw of prior art wiper poor effect in actual use, easily have to strike off clean or cause and rotate the problem that has some setbacks and produce.The purpose of this utility model is to provide a kind of scraping brushing device that makes the ball screw of wiper effect promoting.

To achieve these goals, the scraping brushing device of a kind of ball screw that the utility model provides, its ball screw is to be formed by nut and the mutual fit of screw rod, and on screw rod and nut, has mutually involutory spiral chute respectively, roll with ccontaining a plurality of balls circulating reflux between screw rod and nut, described scraping brushing device is a circular body, be mounted on the nut both ends of the surface, described scraping brushing device internal face one end is provided with the bulge loop of radial protrusion, and move in described bulge loop inner edge one lateral deviation and to be extended with a protuberance, the internal diameter of described bulge loop is the poor of screw rod external diameter and 1/10 ball diameter ± 5%, and the side-play amount of described protuberance is 1/6～2/1 of a ball diameter.Ball screw in use with this scraping brushing device bulge loop inner edge and protuberance suitably conflict screw rod circumferential surface and support in the spiral chute, carry out wiper action.

As preferably, the side-play amount of described scraping brushing device protuberance is 1/3 of a ball diameter.

Compared with prior art, the beneficial effects of the utility model are that scraping brushing device internal face one end is provided with the bulge loop that internal diameter is the difference of screw rod external diameter and 1/10 ball diameter ± 5%, and be provided with the protuberance that skew ball diameter 1/6～2/1 distance extends to form in this bulge loop inner edge one side, and when using with suitably the conflict circumferential surface of screw rod of this bulge loop inner edge, and suitably support in the spiral chute of screw rod with this protuberance, make that the wiper action is more certain, smooth and easy, the wiper effect promoting.

Description of drawings

Fig. 1 is the three-dimensional exploded view of ball screw with scraping brushing device of ball screw of the present utility model.

Fig. 2 is the stereogram of the scraping brushing device of ball screw of the present utility model.

Fig. 3 is the planimetric map of the scraping brushing device of ball screw of the present utility model.

Fig. 4 is the perspective view of ball screw with scraping brushing device of ball screw of the present utility model.

Fig. 5 is the generalized section of ball screw with scraping brushing device of ball screw of the present utility model.

Fig. 6 is the sectional schematic diagram of ball screw with scraping brushing device of ball screw of the present utility model.

The primary clustering symbol description

1 screw rod, 11 spiral chutes

2 nuts, 21 spiral chutes

22 receiving holes, 23 reflux assemblies

3 balls, 4 scraping brushing devices

41 bulge loops, 42 protuberances

Embodiment

Below in conjunction with accompanying drawing structure of the present utility model is further described in detail:

Fig. 1 is the three-dimensional exploded view of ball screw with scraping brushing device of ball screw of the present utility model.Fig. 2 is the stereogram of the scraping brushing device of ball screw of the present utility model.Fig. 3 is the planimetric map of the scraping brushing device of ball screw of the present utility model.Fig. 4 is the perspective view of ball screw with scraping brushing device of ball screw of the present utility model.Fig. 5 is the generalized section of ball screw with scraping brushing device of ball screw of the present utility model.Fig. 6 is the sectional schematic diagram of ball screw with scraping brushing device of ball screw of the present utility model.To shown in Figure 6, the ball screw of present embodiment comprises as Fig. 1: a screw rod 1, and its surface is provided with spiral chute 11; One nut 2 has the spiral chute 21 relative with screw rod 1, and periphery is provided with at least one receiving hole 22 that is communicated to inner perforated, establishes for 23 ccontaining groups for reflux assembly; A plurality of balls 3 are located at 21 of the spiral chutes of the spiral chute 11 of screw rod 1 and nut; Two scraping brushing devices 4, this scraping brushing device 4 is a circular body, be mounted on nut 2 both ends of the surface, wear for screw rod 1, this scraping brushing device 4 internal faces one end is provided with the bulge loop 41 of radial protrusion, and be extended with a protuberance 42 with center of circle offset manner in this bulge loop 41 inner edges one side, the internal diameter r of this bulge loop 41 is diameter ± 5% poor of the external diameter of

screw rod

1 and 1/10 ball 2, the side-play amount L of this protuberance 42 be ball 2 diameter 1/6～2/1, and be the best with 1/3 of the diameter of ball 2, in the spiral chute 11 that supports screw rod 1 with the circumferential surface and the protuberance 42 of these scraping brushing device 4 bulge loops 41 suitable conflict screw rods 1.

When the ball screw start, screw rod 1 is rotated, ball 3 rolls in the spiral chute 11 of

screw rod

1 and 21 circulating refluxs of spiral chute of nut 2, so that nut 2 carries out linear motion smoothly, and with foreign matters such as bits slag on bulge loop 41 inner edge wiper screw rods 1 circumferential surface of the scraping brushing device 4 that is mounted on nut 2 both ends of the surface or dusts, and with foreign matters such as bits slag in protuberance 42 inner edge wiper screw rods 1 spiral chute 11 of scraping brushing device 4 or dusts, it is smooth and easy to guarantee that ball rolls.

Structure by above-mentioned specific embodiment, can obtain following beneficial effect: its scraping brushing device 4 internal faces one end is provided with the bulge loop 41 of difference of diameter ± 5% of external diameter that internal diameter is a

screw rod

1 and 1/10 ball 2, and be provided with a protuberance 42 that extends to form with 1/6～2/1 range range mode of center of circle skew ball diameter in this bulge loop 41 inner edges one side, in use with the circumferential surface of these bulge loop 41 inner edge conflict screw rods 1, and support in the spiral chute 11 of screw rod 1 with this protuberance 42, form closely cooperating and not producing interference of suitably compressing, make that the wiper action of scraping brushing device 4 is more certain, smooth and easy, the wiper effect promoting.

Certainly; the above is a preferred implementation of the present utility model; should be understood that; for those skilled in the art; under the prerequisite that does not break away from the utility model principle; can also make some improvements and modifications, these improvements and modifications also are considered as protection domain of the present utility model.

Claims

1. the scraping brushing device of a ball screw, its ball screw is to be formed by nut and the mutual fit of screw rod, and on screw rod and nut, has mutually involutory spiral chute respectively, roll with ccontaining a plurality of balls circulating reflux between screw rod and nut, described scraping brushing device is circular body, be mounted on the nut both ends of the surface, it is characterized in that:

Described scraping brushing device internal face one end is provided with the bulge loop of radial protrusion, and move in described bulge loop inner edge one lateral deviation and to be extended with a protuberance, the internal diameter of described bulge loop is the poor of screw rod external diameter and 1/10 ball diameter ± 5%, and the side-play amount of described protuberance is 1/6～2/1 of a ball diameter.

2. the scraping brushing device of ball screw as claimed in claim 1, it is characterized in that: the side-play amount of described scraping brushing device protuberance is 1/3 of a ball diameter.