CN210531537U

CN210531537U - Ball screw with improved ball reverser

Info

Publication number: CN210531537U
Application number: CN201921306321.9U
Authority: CN
Inventors: 叶可地
Original assignee: Dakai Precision Industry Zhejiang Co ltd
Current assignee: Dakai Precision Industry Zhejiang Co ltd
Priority date: 2019-08-13
Filing date: 2019-08-13
Publication date: 2020-05-15
Anticipated expiration: 2029-08-13

Abstract

The utility model discloses a ball screw with improve type steel ball is returned to ware, be equipped with on the nut body and return to the ware body, the spout inner wall that returns to the ware body is equipped with sheetmetal and two location feet for butt ball passageway inner wall, the sheetmetal is used for rather than the butt when the ball passes the spout that returns on the ware body, avoid the ball to pass and return the ware body and make and spout contact, thereby reduce the wearing and tearing to spout and ball, the life of extension is returned to the ware body, and ball screw mechanism's life cycle is longer, two location feet can prevent effectively that it takes place to return the ware body and break away from the phenomenon at ball screw rotation in-process, make ball screw operation more stable.

Description

Ball screw with improved ball reverser

Technical Field

The utility model relates to a mechanical transmission spare part field, concretely relates to ball screw with modified steel ball returns to ware.

Background

The ball screw is a commonly used linear moving device, which can convert the rotary motion into linear motion, most of the existing ball screws comprise a screw rod and a nut sleeved on the screw rod, a plurality of balls capable of reciprocating along a circulating path are arranged between the screw rod and the nut, and when a motor is used for driving the screw rod to rotate, relative rotation is generated between the screw rod and the nut drives the nut to perform linear motion. Present ball screw can cause wearing and tearing and damage to ball screw's returning to ware body inner wall after operating for a long time, makes the ball card at the wearing and tearing point, and serious meeting leads to returning to the ware body and breaks away from ball screw mechanism, can influence the stability and the precision that ball screw operated to reduce life.

SUMMERY OF THE UTILITY MODEL

In order to solve the problem, the utility model provides a ball screw with modified steel ball is returned to ware has further improved and has returned to the ware body, through be equipped with the location foot that is used for butt ball passageway inner wall on returning to the ware body and be equipped with the surperficial glossy sheetmetal that is used for the butt ball on the spout, accessible sheetmetal reduces the friction of ball and spout inner wall, prolongs ball screw mechanism's life better.

The utility model provides a technical scheme of above-mentioned problem is: a ball screw with an improved ball reverser comprises a screw, a nut body and a plurality of balls, wherein the outer wall of the screw is provided with an outer spiral groove, the nut body is sleeved on the screw, and the nut body is provided with an inner spiral groove and the reverser body; the ball return device is characterized in that the return device body is provided with a sliding groove for the ball to move to an adjacent ball channel and two positioning pins for abutting against the inner wall of the ball channel, and the inner wall of the sliding groove is provided with a metal sheet for abutting against the ball.

Furthermore, the metal sheet is an arc metal sheet matched with the inner wall of the sliding chute.

Furthermore, two positioning pins for abutting against the inner wall of the ball channel are respectively arranged on two adjacent ball channels.

Further, the positioning feet are arc-shaped positioning feet matched with the inner wall of the ball bearing channel.

Further, the reverser body and the nut body are arranged in an inclined mode.

The utility model has the advantages that: be provided with the glossy sheetmetal in surface at the spout inner wall that returns to the ware body, contact with the spout when avoiding the ball to pass to returning the ware body, thereby reduce the wearing and tearing between spout and the ball two, the life of ware body is returned in the extension, and after adding the sheetmetal, ball screw mechanism's life cycle is longer, return to and set up two location feet on the ware body simultaneously, the location foot agrees with mutually with ball passageway inner wall, can prevent effectively that it takes place to return the ware body and break away from the phenomenon at ball screw rotation in-process, make ball screw operation more stable.

Drawings

Fig. 1 is a structural diagram of a ball screw with an improved ball return device of the present invention.

Fig. 2 is a sectional view of a nut body according to an embodiment of the present invention.

Fig. 3 is a partial structural view of the ball passing through the return device body according to an embodiment of the present invention.

Fig. 4 is a structural diagram of the ball of an embodiment of the present invention when the ball is on the ball passage.

Fig. 5 is a structural diagram of a return device body according to an embodiment of the present invention.

In the figure:

1-a screw; 11-external spiral groove; 2-the nut body; 21-inner spiral groove; 3-rolling balls; 4-a reverser body; 41-a chute; 42-positioning feet; 5-ball passage.

Detailed Description

In order to more clearly illustrate the embodiments of the present invention and the technical solutions in the prior art, the following description will explain specific embodiments of the present invention with reference to the accompanying drawings. It is obvious that the drawings in the following description are only some examples of the invention, and for a person skilled in the art, other drawings and other embodiments can be obtained without inventive effort, and the invention is not limited to this example.

Please refer to fig. 1 to 5. The utility model provides a ball screw with modified steel ball returning device, including the screw rod 1 that the outer wall is equipped with outer spiral groove 11, the nut body 2 and a plurality of ball 3 of cover locating on the screw rod 1, be equipped with interior spiral groove 21 and returning device body 4 on the nut body 2; the outer spiral groove 11 and the inner spiral groove 21 are matched to form a ball passage 5 for accommodating the ball 3; the return device body 4 is provided with a chute 41 for the ball 3 to move to the adjacent ball channel 5 and two positioning pins 42 for abutting against the inner wall of the ball channel 5, and the inner wall of the chute 41 is provided with a metal sheet (not shown in the figure) for abutting against the ball 3.

Supplementary explanation, the sheetmetal surface sets up smoothly, and specifically speaking, the sheetmetal is smooth with the one side surface that ball 3 contacted to avoided contacting with ball 3 when ball 3 passes spout 41, can avoid like this ball 3 and spout 41 two because long-time contact and lead to the serious condition of wearing and tearing, thereby make ball 3 can not take place the card and pause or the condition of card shell when passing through spout 41, and then can not influence the normal operating of returning to ware body 4 and whole mechanism.

Meanwhile, the two positioning pins 42 are arranged on the reverser body 4, so that the phenomenon that the reverser body 4 is separated in the rotating process of the ball screw can be effectively prevented, and the ball screw can run more stably;

the two ends of the depth of the sliding groove 41 are relatively shallow, and the depth is gradually increased towards the middle part, so that the ball 3 can be completely accommodated to pass through, namely, the channel is changed from one ball channel 5 to the adjacent other ball channel 5, and the operation is smoother.

Please refer to fig. 5 again. In this example, one embodiment of the metal sheet may be an arc-shaped metal sheet fitted to the inner wall of the sliding chute 41, a surface of the arc-shaped metal sheet contacting the balls 3 is smooth, the metal sheet increases the wear resistance of the metal sheet after the inner wall of the sliding chute 41 is die-cast, and the depths of the two ends of the sliding chute 41 are shallower than the middle end of the sliding chute 41, so as to increase the smoothness of rolling of the balls.

Please refer to fig. 3 again. In this embodiment, the positioning legs 42 may be implemented by two positioning legs 42 respectively disposed on two adjacent ball passages 5, and the two positioning legs 42 abut against the inner wall of the ball passages 5, so as to facilitate the stable mounting of the reverser body 4 on the nut body 2 and the use of the screw 1 in cooperation with the ball passages 5.

In this example, the positioning leg 42 may be an arc-shaped positioning leg engaged with the inner wall of the ball channel 5, so that the arc-shaped positioning leg can be configured to better engage with the inner wall of the ball channel 5, specifically, the radian of the end portion of the arc-shaped positioning leg is substantially the same as the radian of the inner wall of the ball channel 5, and thus rubbing and damage to the inner wall of the ball channel 5 are avoided.

In this embodiment, the reverser body 4 can be inclined from the axial line of the nut body 2 by a specific angle of 45 to 60 degrees, so as to facilitate the reverser body 4 to better exert its intended function, and the balls 3 move more smoothly, and the whole structure can better act on the nut body 2 (and also facilitate the two positioning legs 42 on the reverser body 4 to be better disposed on the two ball passages 5).

Specific embodiments of the present invention have been described above in detail. It should be understood that numerous modifications and variations can be devised by those skilled in the art in light of the teachings of the present invention without undue experimentation. Therefore, the technical solutions that can be obtained by logical analysis, reasoning or limited experiments in the prior art, which are already known to those skilled in the art, should be within the scope of protection defined by the claims.

Claims

1. The utility model provides a ball screw with improve shaped steel pearl returning to ware which characterized in that: the ball-type steering gear comprises a screw rod (1) with an outer spiral groove (11) on the outer wall, a nut body (2) sleeved on the screw rod (1) and a plurality of balls (3), wherein the nut body (2) is provided with an inner spiral groove (21) and a reverser body (4); the outer spiral groove (11) and the inner spiral groove (21) are matched to form a ball passage (5) for accommodating the ball (3); the ball return device is characterized in that the return device body (4) is provided with a sliding groove (41) for the balls (3) to move to the adjacent ball channels (5) and two positioning pins (42) for abutting the inner walls of the ball channels (5), and the inner walls of the sliding grooves (41) are provided with metal sheets for abutting the balls (3).

2. The ball screw with the improved ball return device as set forth in claim 1, wherein: the metal sheet is an arc metal sheet matched with the inner wall of the sliding groove (41).

3. The ball screw with the improved ball return device as set forth in claim 1, wherein: two positioning feet (42) for abutting against the inner wall of the ball channel (5) are respectively arranged on two adjacent ball channels (5).

4. The ball screw with the improved ball return device as set forth in claim 1, wherein: the positioning feet (42) are arc-shaped positioning feet which are matched with the inner wall of the ball channel (5).

5. The ball screw with the improved ball return device as set forth in claim 1, wherein: the axial lead of the reverser body (4) and the axial lead of the nut body (2) are arranged in an inclined way.