Limited stroke ball spline

Abstract

The utility model belongs to the technical field of ball splines, and particularly relates to a limited stroke ball spline which comprises a base, fixing frames are symmetrically arranged on the two sides of the top of the base, transverse rotating shafts are rotationally arranged on the side walls of the two fixing frames through bearing sleeves, and a ball spline body is fixedly arranged between the two rotating shafts. The ball spline body comprises a transverse spline shaft fixed between the ends of the two rotating shafts. According to the utility model, the double-end screw rod is conveniently driven to rotate through the hand rocker, so that the distance between the two limiting plates is adjusted, the spline nut can be limited in the area between the two limiting plates, namely the area in which the spline nut can axially move, and further, the positions of the two limiting plates can be integrally adjusted; that is to say, the rotating disc drives the screw rod to rotate, so that the left-right positions of the two mounting plates in the sliding groove are adjusted, the relative positions of the two limiting plates on the spline shaft can be changed, and the spline nut can move in a designated area.

Description

Technical Field

[0001] The utility model relates to the technical field of ball splines, in particular to a limited-stroke ball spline. Background Art

[0002] Ball spline is a linear motion system that achieves point contact and cyclic rolling through the precision-ground grooves of the spline shaft and the balls in the spline sleeve. This transmission element is widely used in many fields, including but not limited to semiconductor equipment, high-inspiration robots, aerospace, medical equipment, etc. Limited stroke ball spline is a type of ball spline with limited stroke. In a specific working environment, this limited stroke design can meet specific needs, such as limiting the range of motion and improving positioning accuracy.

[0003] In the prior art, a limit plate is used to limit the movement of the spline nut. The traditional way of adjusting the limit plate requires loosening the bolts on the limit plate, adjusting the position of the limit plate, and then fixing the bolts to adjust the position of the limit plate. This is inconvenient, so it is necessary to develop a limited-stroke ball spline. Utility Model Content

[0004] The purpose of this section is to summarize some aspects of the embodiments of the utility model and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the abstract of the specification and the name of the utility model of this application to avoid blurring the purpose of this section, the abstract of the specification and the name of the utility model, and such simplifications or omissions cannot be used to limit the scope of the utility model.

[0005] In order to solve the above technical problems, according to one aspect of the present invention, the present invention provides the following technical solutions:

[0006] A limited stroke ball spline, comprising:

[0007] A base, wherein fixing frames are symmetrically arranged on both sides of the top of the base, and the side walls of the two fixing frames are rotatably arranged with transverse rotating shafts through bearing sleeves, and a ball spline body is fixedly arranged between the two rotating shafts, and the ball spline body includes a transverse spline shaft fixed between the ends of the two rotating shafts, and a spline nut is slidably arranged on the spline shaft, and a flange outer ring is protruded on the outer side of the spline nut;

[0008] A slide groove, a horizontal slide groove is opened in the middle of the top wall of the base, and the inner cavity of the slide groove is provided with two vertical mounting plates, and a horizontal double-headed screw is rotatably arranged between the two mounting plates. The external threads on the left and right sections of the double-headed screw are opposite, and limit plates are respectively screwed and transmitted, and the outer ring of the flange is located between the two limit plates, and when the spline nut axially moves beyond the preset position, the side wall of the outer ring of the flange touches the side wall of the limit plate.

[0009] As a preferred solution of a limited-stroke ball spline described in the utility model, one end of the rod body of the double-headed screw extends and rotates to penetrate the side wall of the mounting plate, and a hand crank is provided at the end.

[0010] As a preferred solution of a limited stroke ball spline described in the utility model, the two mounting plates are slidably located in the inner cavity of the slide groove, and a transverse screw is rotatably arranged in the inner cavity of the slide groove, and the shaft of the screw is threadedly connected to and passes through the side walls of the two mounting plates.

[0011] As a preferred solution of the limited stroke ball spline described in the utility model, one end of the screw rod extends and rotates to penetrate the side wall of the base, and a turntable is provided at the end.

[0012] As a preferred solution of a limited stroke ball spline described in the utility model, wherein: the inner cavity of the slide groove is fixedly provided with a transverse guide slide rod, the guide slide rod and the screw rod are staggered up and down, and the rod body of the guide slide rod slides through the side walls of the two limit plates and the side walls of the two mounting plates.

[0013] As a preferred solution of the limited stroke ball spline described in the utility model, the side walls of the two fixing frames are provided with openings, and the openings are used for the installation plate to move in and out laterally.

[0014] Compared with the prior art, the beneficial effects of the utility model are: the double-headed screw can be conveniently driven to rotate by the hand crank, so as to adjust the spacing between the two limit plates, and the area between the two limit plates, that is, the area where the spline nut can move axially, that is, the spline nut can be limited. Furthermore, the positions of the two limit plates can be adjusted as a whole, that is, the screw can be driven to rotate by the turntable, so as to adjust the left and right positions of the two mounting plates in the slide groove, that is, the relative positions of the two limit plates on the spline shaft can be changed, so that the spline nut can move only within the specified area. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solution of the implementation of the utility model, the utility model will be described in detail below in combination with the drawings and detailed implementation. Obviously, the drawings described below are only some implementations of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative labor. Among them:

[0016] Figure 1 It is a schematic diagram of the structure of the utility model;

[0017] Figure 2 It is a schematic diagram of the structure of the base cross section and the internal components of the slideway of the utility model;

[0018] Figure 3 This is a schematic diagram of the structure of the utility model after the distance between the two limit plates is adjusted;

[0019] Figure 4 It is a schematic structural diagram of the utility model after the overall position of the two limit plates is adjusted relative to the spline shaft.

[0020] In the figure: base 100, fixing frame 110, bearing sleeve 120, rotating shaft 130, ball spline body 140, spline shaft 141, spline nut 142, flange outer ring 143, slide groove 200, limit plate 210, double-headed screw 220, mounting plate 230, hand crank 240, screw 250, turntable 260, guide slide rod 270, opening 280. DETAILED DESCRIPTION

[0021] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below with reference to the accompanying drawings.

[0022] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific implementation methods disclosed below.

[0023] Secondly, the present invention is described in detail with reference to the schematic diagram. When describing the implementation of the present invention, for the sake of convenience, the cross-sectional diagram showing the device structure will not be partially enlarged according to the general proportion, and the schematic diagram is only an example, which should not limit the scope of protection of the present invention. In addition, in actual production, the three-dimensional dimensions of length, width and depth should be included.

[0024] In order to make the purpose, technical solution and advantages of the present invention more clear, the implementation mode of the present invention will be further described in detail below with reference to the accompanying drawings.

[0025] See also Figure 1-Figure 4 , shows a schematic diagram of the structure of a limited stroke ball spline implementation method of the utility model, please refer to Figure 1-Figure 4 , a limited stroke ball spline is introduced in detail.

[0026] A limited stroke ball spline, comprising a base 100, wherein fixing frames 110 are symmetrically arranged on both sides of the top of the base 100, and the side walls of the two fixing frames 110 are rotatably arranged with transverse rotating shafts 130 through bearing sleeves 120, and a ball spline body 140 is fixedly arranged between the two rotating shafts 130, and the ball spline body 140 includes a transverse spline shaft 141 fixed between the ends of the two rotating shafts 130, and a spline nut 142 is slidably sleeved on the spline shaft 141, and a flange outer ring 143 is protruded from the outer side of the spline nut 142;

[0027] A transverse slide groove 200 is opened in the middle of the top wall of the base 100, and two vertical mounting plates 230 are arranged in the inner cavity of the slide groove 200. A transverse double-headed screw 220 is rotatably arranged between the two mounting plates 230. The external threads on the left and right sections of the double-headed screw 220 are opposite, and limit plates 210 are respectively screwed and arranged for transmission. The flange outer ring 143 is located between the two limit plates 210, and when the spline nut 142 moves axially beyond the preset position, the side wall of the flange outer ring 143 touches the side wall of the limit plate 210.

[0028] Furthermore, one end of the rod body of the double-headed screw rod 220 extends and rotates to penetrate the side wall of the mounting plate 230, and a hand crank 240 is provided at the end, which can conveniently drive the double-headed screw rod 220 to rotate, thereby adjusting the distance between the two limit plates 210.

[0029] Furthermore, the two mounting plates 230 are slidably located in the inner cavity of the slide groove 200, and a transverse screw 250 is rotatably provided in the inner cavity of the slide groove 200. The rod body of the screw 250 is threadedly connected to the side walls of the two mounting plates 230, and one end of the screw 250 extends and rotates to penetrate the side wall of the base 100, and a turntable 260 is provided at the end. The turntable 260 is used to conveniently drive the screw 250 to rotate, thereby adjusting the left and right positions of the two mounting plates 230 in the slide groove 200, that is, the relative positions of the two limit plates 210 on the spline shaft 141 can be changed, so that the spline nut 142 can move only within the specified area.

[0030] Furthermore, the inner cavity of the slide groove 200 is fixedly provided with a transverse guide slide bar 270, and the guide slide bar 270 and the screw rod 250 are staggered up and down. The rod body of the guide slide bar 270 slides through the side walls of the two limit plates 210 and the side walls of the two mounting plates 230. The limit plates 210 and the mounting plates 230 are limited by the set guide slide bar 270, so that they move more smoothly.

[0031] Furthermore, the side walls of the two fixing frames 110 are provided with openings 280 , and the openings 280 are used for the installation plate 230 to move in and out laterally. The openings 280 allow the installation plate 230 to move freely.

[0032] During specific use, the double-headed screw 220 is conveniently driven to rotate by the hand crank 240, so as to adjust the spacing between the two limit plates 210, and the area between the two limit plates 210, that is, the area where the spline nut 142 can move axially, that is, the spline nut 142 can be limited. Furthermore, the positions of the two limit plates 210 can be adjusted as a whole, that is, the screw 250 is driven to rotate by the turntable 260, so as to adjust the left and right positions of the two mounting plates 230 in the slide groove 200, that is, the relative positions of the two limit plates 210 on the spline shaft 141 can be changed, so that the spline nut 142 can move only within the specified area.

[0033] Although the present invention has been described above with reference to the embodiments, various modifications may be made thereto and parts thereof may be replaced with equivalents without departing from the scope of the present invention. In particular, as long as there is no structural conflict, the various features in the embodiments disclosed in the present invention may be used in combination with each other in any manner, and the fact that these combinations are not exhaustively described in this specification is only for the sake of omitting space and saving resources. Therefore, the present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A limited stroke ball spline, characterized in that: include: A base (100), wherein fixing frames (110) are symmetrically arranged on both sides of the top of the base (100), and the side walls of the two fixing frames (110) are rotatably provided with transverse rotating shafts (130) through bearing sleeves (120), and a ball spline body (140) is fixedly arranged between the two rotating shafts (130), and the ball spline body (140) includes a transverse spline shaft (141) fixed between the ends of the two rotating shafts (130), and a spline nut (142) is slidably sleeved on the spline shaft (141), and a flange outer ring (143) is protrudingly arranged on the outer side of the spline nut (142); A slide groove (200), a transverse slide groove (200) is opened in the middle of the top wall of the base (100), the inner cavity of the slide groove (200) is provided with two vertical mounting plates (230), a transverse double-headed screw (220) is rotatably arranged between the two mounting plates (230), the external threads on the left and right sections of the double-headed screw (220) are opposite, and limit plates (210) are respectively screwed and transmitted, the flange outer ring (143) is located between the two limit plates (210), and when the spline nut (142) moves axially beyond a preset position, the side wall of the flange outer ring (143) touches the side wall of the limit plate (210).

2. A limited stroke ball spline according to claim 1, characterized in that: One end of the rod body of the double-ended screw rod (220) extends and rotates to penetrate the side wall of the mounting plate (230), and a hand crank (240) is provided at the end.

3. A limited stroke ball spline according to claim 1, characterized in that: The two mounting plates (230) are slidably located in the inner cavity of the slide groove (200), and a transverse screw rod (250) is rotatably arranged in the inner cavity of the slide groove (200), and the rod body of the screw rod (250) is threadedly connected to and passes through the side walls of the two mounting plates (230).

4. A limited stroke ball spline according to claim 3, characterized in that: One end of the screw rod (250) extends and rotates to penetrate the side wall of the base (100), and a rotating disk (260) is provided at the end.

5. A limited stroke ball spline according to claim 3, characterized in that: A transverse guide slide bar (270) is fixedly arranged in the inner cavity of the slide groove (200), and the guide slide bar (270) and the screw rod (250) are arranged alternately up and down, and the rod body of the guide slide bar (270) slides through the side walls of the two limit plates (210) and the side walls of the two mounting plates (230).

6. A limited stroke ball spline according to claim 3, characterized in that: The side walls of the two fixing frames (110) are provided with openings (280), and the openings (280) are used for the installation plate (230) to move in and out laterally.

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