Linear rotation integrated composite ball spline

Abstract

The utility model relates to the technical field of ball splines, and discloses a linear rotation integrated composite ball spline which comprises a spline shaft, a spline sleeve is arranged in the middle of the outer wall of a shaft body of the spline shaft in a sleeved mode, a plurality of installation grooves are formed in the edge of the inner wall of the spline sleeve, and a plurality of balls are rotationally connected to the inner walls of the installation grooves. The middle of the outer wall of the spline sleeve is sleeved with a protective sleeve, a mounting cavity is formed in the protective sleeve, and a plurality of limiting springs are fixedly connected to the inner wall of the mounting cavity. According to the linear rotation integrated composite ball spline, when the linear rotation integrated composite ball spline is used, the rollers are rotationally connected in the mounting grooves, so that the rollers can be conveniently driven to roll in the limiting sliding openings, and the overall linear motion of the linear rotation integrated composite ball spline is achieved; due to the fact that the radian of the limiting sliding opening is attached to the radian of the lower end in contact with the balls, the multiple balls and the spline housing are driven to rotate together when the spline shaft rotates, and an object above the spline housing is driven to rotate together.

Description

Technical Field

[0001] The utility model relates to the technical field of ball splines, in particular to a linear and rotary integrated composite ball spline. Background Art

[0002] As we all know, ball spline is a mechanical device used to transmit force and torque, and is often used in mechanical transmission systems. It usually consists of a spline wheel and a spline shaft. The spline wheel has raised splines, and the spline shaft has corresponding grooves. Through this special structure, the spline wheel and the spline shaft can transmit force and torque through the cooperation of splines.

[0003] However, when traditional ball splines perform combined rotation and linear motion, it is necessary to consider the forces in multiple directions, so a complex structure needs to be designed, including the coordination of multiple spline wheels and spline shafts, as well as support structures, which increases the manufacturing cost and assembly difficulty. Therefore, technical improvements are urgently needed. Utility Model Content

[0004] The purpose of the utility model is to solve the shortcomings existing in the prior art, and a linear-rotating integrated composite ball spline is proposed. When the linear-rotating integrated composite ball spline is used, multiple rollers are rotatably connected in the installation groove, so as to drive the rollers to roll in the limit sliding opening, thereby realizing the overall linear motion. When the spline shaft rotates, the curvature of the limit sliding opening is in line with the curvature of the lower end contacted by the ball, so that when the spline shaft rotates, the multiple balls and the spline sleeve are driven to rotate together, thereby driving the object above the spline sleeve to rotate together.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A linear-rotating integrated composite ball spline comprises a spline shaft, a spline sleeve is sleeved on the middle part of the outer wall of the spline shaft, a plurality of mounting grooves are provided at the edge of the inner wall of the spline sleeve, a plurality of balls are rotatably connected to the inner walls of the mounting grooves, a protective sleeve is sleeved on the middle part of the outer wall of the spline sleeve, a mounting cavity is provided inside the protective sleeve, and a plurality of limit springs are fixedly connected to the inner wall of the mounting cavity.

[0007] Through the above technical scheme, compared with the existing linear-rotary integrated composite ball spline, when the linear-rotary integrated composite ball spline is used, the two bearings on the outer wall can increase the load-bearing area between the spline sleeve and the shaft, disperse the load-bearing pressure, thereby improving the load-bearing capacity and durability of the transmission device. The combination of the protective sleeve and the limit spring can reduce the noise and vibration generated during the movement between the spline sleeve and the spline shaft, and improve the comfort and quietness of the transmission device, and has high practical performance.

[0008] Furthermore, a plurality of limit sliding openings are provided at the edge of the outer wall of the spline shaft, and the balls are slidably connected inside the limit sliding openings;

[0009] Through the above technical solution, the balls are connected by sliding inside the limit sliding opening, which makes it easy to drive the balls to perform linear motion on the spline shaft.

[0010] Furthermore, the spline sleeves are all slidably connected to the outer wall of the spline shaft via balls;

[0011] Through the above technical solution, the spline sleeves are slidably connected to the outer wall of the spline shaft through the balls, so as to drive the whole to perform linear motion on the spline shaft.

[0012] Furthermore, the inner wall of the protective sleeve is tightly fitted with the middle part of the outer wall of the spline sleeve;

[0013] Through the above technical solution, the protective cover can facilitate the improvement of the fit.

[0014] Furthermore, the upper end and the lower end of the outer wall of the spline sleeve are both provided with a first bearing and a second bearing, and the inner walls of the first bearing and the second bearing are both fixedly connected to the outer wall of the spline sleeve;

[0015] Through the above technical solution, the bearing pressure is easily dispersed through the first bearing and the second bearing, thereby improving the bearing capacity and durability of the transmission device.

[0016] Furthermore, the protective cover is made of rubber;

[0017] Through the above technical solution, vibration reduction can be well performed through rubber.

[0018] The utility model has the following beneficial effects:

[0019] 1. The utility model proposes a linear-rotational integrated composite ball spline. Compared with the existing linear-rotational integrated composite ball spline, when the linear-rotational integrated composite ball spline is used, multiple rollers are connected and rotated in the installation groove, so as to drive the rollers to roll in the limit sliding opening, thereby realizing the overall linear motion. When the spline shaft rotates, the curvature of the limit sliding opening is in line with the curvature of the lower end contacted by the ball, so that when the spline shaft rotates, the multiple balls and the spline sleeve are driven to rotate together, thereby driving the object above the spline sleeve to rotate together.

[0020] 2. The utility model proposes a linear-rotational integrated composite ball spline. Compared with the existing linear-rotational integrated composite ball spline, when the linear-rotational integrated composite ball spline is used, the two bearings on the outer wall can increase the bearing area between the spline sleeve and the shaft, disperse the bearing pressure, thereby improving the bearing capacity and durability of the transmission device. The combination of the protective sleeve and the limit spring can reduce the noise and vibration generated during the movement between the spline sleeve and the spline shaft, and improve the comfort and quietness of the transmission device, and has high practical performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is an axonometric diagram of a linear and rotary integrated composite ball spline proposed by the utility model;

[0022] Figure 2 This is an axonometric schematic diagram of a spline sleeve in a linear and rotary integrated composite ball spline proposed by the utility model;

[0023] Figure 3 It is an exploded schematic diagram of a spline sleeve in a linear and rotary integrated composite ball spline proposed by the utility model;

[0024] Figure 4 This is an axial cross-sectional view of a spline sleeve in a linear and rotary integrated composite ball spline proposed by the utility model;

[0025] Figure 5 The utility model provides a top view of a linear and rotary integrated composite ball spline.

[0026] 1. Spline shaft; 2. Limit sliding opening; 3. Spline sleeve; 4. Mounting groove; 5. Ball; 6. Protective sleeve; 7. Mounting cavity; 8. Limit spring; 9. First bearing; 10. Second bearing. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0028] Reference Figure 1-5The utility model provides an embodiment: a linear-rotating integrated composite ball spline, comprising a spline shaft 1, a spline sleeve 3 is sleeved in the middle of the outer wall of the spline shaft 1, a plurality of mounting grooves 4 are provided at the edge of the inner wall of the spline sleeve 3, a plurality of balls 5 are rotatably connected to the inner wall of the mounting groove 4, a protective sleeve 6 is sleeved in the middle of the outer wall of the spline sleeve 3, a mounting cavity 7 is provided inside the protective sleeve 6, and a plurality of limit springs 8 are fixedly connected to the inner wall of the mounting cavity 7.

[0029] Compared with the existing linear-rotary integrated composite ball spline, when the linear-rotary integrated composite ball spline is in use, the two bearings on the outer wall can increase the load-bearing area between the spline sleeve 3 and the spline shaft 1, disperse the load-bearing pressure, thereby improving the load-bearing capacity and durability of the transmission device. The combination of the protective sleeve 6 and the limit spring 8 can reduce the noise and vibration generated during movement between the spline sleeve 3 and the spline shaft 1, and improve the comfort and quietness of the transmission device, with high practical performance.

[0030] The edges of the outer wall of the spline shaft 1 are provided with a plurality of limited sliding openings 2, and the balls 5 are slidably connected inside the limited sliding openings 2. The balls 5 are slidably connected inside the limited sliding openings 2 to facilitate the balls 5 to move linearly on the spline shaft 1. The spline sleeve 3 is slidably connected to the outer wall of the spline shaft 1 through the balls 5, and the spline sleeve 3 is slidably connected to the outer wall of the spline shaft 1 through the balls 5, which is convenient for driving the whole to move linearly on the spline shaft 1. The upper and lower ends of the outer wall of the spline sleeve 3 are provided with a first bearing 9 and a second bearing 10. The inner walls of the first bearing 9 and the second bearing 10 are fixedly connected to the outer wall of the spline sleeve 3. The first bearing 9 and the second bearing 10 are convenient for dispersing the bearing pressure, thereby improving the bearing capacity and durability of the transmission device. The inner wall of the protective sleeve 6 is tightly fitted with the middle part of the outer wall of the spline sleeve 3, and the tight fit facilitates the improvement of the fit. The protective sleeve 6 is made of rubber material, and the rubber facilitates good vibration reduction.

[0031] Working principle: When in use, multiple rollers are connected and rotated in the installation groove 4, so as to drive the rollers to roll in the limiting sliding port 2, thereby realizing the overall linear motion. When the spline shaft 1 rotates, since the curvature of the limiting sliding port 2 is in line with the curvature of the lower end contacted by the ball 5, the spline shaft 1 rotates and drives multiple balls 5 and the spline sleeve 3 to rotate together, thereby driving the objects above the spline sleeve 3 to rotate together. The two bearings on the outer wall can increase the bearing area between the spline sleeve 3 and the spline shaft 1, and disperse the bearing pressure, thereby improving the bearing capacity and durability of the transmission device. The combination of the protective sleeve 6 and the limiting spring 8 can reduce the noise and vibration generated during the movement between the spline sleeve 3 and the spline shaft 1, and improve the comfort and quietness of the transmission device.

[0032] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A linear and rotary integrated composite ball spline, comprising a spline shaft (1), characterized in that: A spline sleeve (3) is sleeved in the middle of the outer wall of the spline shaft (1), a plurality of mounting grooves (4) are provided at the edge of the inner wall of the spline sleeve (3), a plurality of balls (5) are rotatably connected to the inner wall of the mounting groove (4), a protective sleeve (6) is sleeved in the middle of the outer wall of the spline sleeve (3), a mounting cavity (7) is provided inside the protective sleeve (6), and a plurality of limit springs (8) are fixedly connected to the inner wall of the mounting cavity (7).

2. The linear and rotary integrated composite ball spline according to claim 1, characterized in that: A plurality of position-limiting sliding openings (2) are provided at the edge of the outer wall of the spline shaft (1), and the balls (5) are slidably connected inside the position-limiting sliding openings (2).

3. The linear and rotary integrated composite ball spline according to claim 1, characterized in that: The spline sleeves (3) are slidably connected to the outer wall of the spline shaft (1) via balls (5).

4. The linear and rotary integrated composite ball spline according to claim 1, characterized in that: The inner wall of the protective sleeve (6) is tightly fitted to the middle part of the outer wall of the spline sleeve (3).

5. The linear and rotary integrated composite ball spline according to claim 1, characterized in that: A first bearing (9) and a second bearing (10) are provided at the upper end and the lower end of the outer wall of the spline sleeve (3); the inner walls of the first bearing (9) and the second bearing (10) are fixedly connected to the outer wall of the spline sleeve (3).

6. The linear and rotary integrated composite ball spline according to claim 1, characterized in that: The protective cover (6) is made of rubber.

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