Groove type internal circulation six-groove flange ball spline

Abstract

The utility model discloses a groove type internal circulation six-groove flange ball spline which comprises a spline shaft, a first groove, a cylinder outer sleeve, a first protruding block, a ball circulator, a transmission ball, a first sealing ring, a third groove, a ball groove, an opening groove, a fourth groove and a second sealing ring. A fourth groove and a second through hole are formed in the cylinder outer sleeve, a flange plate is fixedly connected to one end of the cylinder outer sleeve, and a screw hole is formed in the flange plate; the ball spline is provided with a plurality of grooves and a plurality of linearly moving conveying grooves, six paths of balls are divided into two groups, the two groups are staggered at an included angle of 30 degrees, each group of balls are uniformly distributed at 120 degrees, and more balls are in contact with the spline shaft and the spline inner sleeve, so that the ball spline can run stably and reliably, the conveying efficiency is higher, and the service life of the ball spline is prolonged. And particularly, during high-speed operation, the loss of the balls is reduced more obviously, the service life is prolonged, and a larger ball size can be used under the same shaft diameter through the balls.

Description

Technical Field

[0001] The utility model relates to the technical field of flange ball splines, in particular to a groove type inner circulation six-groove flange ball spline. Background Art

[0002] A flange ball spline is a linear motion transmission component. When the spline outer sleeve makes a linear reciprocating motion on a precision ground spline shaft by using the balls therein, torque can be transmitted. The ball spline pair has a relatively compact structure and can achieve efficient linear transmission in a limited space. It is suitable for various application scenarios with limited space and can transmit loads and power, so it is widely used in fields such as automation devices and robots.

[0003] However, it also has the following disadvantages: First, general flange ball splines usually have two grooves and four grooves, resulting in a relatively low load capacity of ordinary ball splines; Second, the flange ball spline will show unstable operation during operation, especially more obvious during high-speed operation. At the same time, due to the unstable operation, the wear of the flange ball spline increases, reducing the service life of the flange ball spline. Third, the balls used in ordinary flange ball splines have a single size and have a relatively small bearing capacity for radial loads, and cannot cope with harsh and complex working conditions. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a groove type inner circulation six-groove flange ball spline to solve the problems raised in the above background art.

[0005] To solve the above technical problems, the utility model provides the following technical solutions: A groove type inner circulation six-groove flange ball spline, including a cylindrical outer sleeve, on which a fourth groove and a second through hole are provided. One end of the cylindrical outer sleeve is fixedly connected with a flange plate, on which a screw hole is provided. A first convex block is fixedly connected inside the cylindrical outer sleeve, and a second groove is provided on the first convex block.

[0006] As a further technical solution of the utility model, a first sealing ring and a second sealing ring are sleeved inside the cylindrical outer sleeve.

[0007] As a further technical solution of the utility model, a ball circulator is sleeved inside the cylindrical outer sleeve. The ball circulator is provided with a ball groove and an opening groove, and the second groove is located on the ball groove and the opening groove.

[0008] As a further technical solution of the utility model, a third through hole is provided on the ball circulator, and a second convex block is fixedly connected to the ball circulator.

[0009] As a further technical solution of the utility model, transmission balls are arranged in the ball groove, and a third groove is provided on the ball circulator.

[0010] As a further technical solution of the present utility model, a spline shaft is sleeved inside the ball circulator. A first groove is formed on the spline shaft, and the first groove is sleeved with the opening groove.

[0011] As a further technical solution of the present utility model, a first through hole is formed on the spline shaft.

[0012] Compared with the prior art, the beneficial effects achieved by the present utility model are as follows: The present utility model is designed with multiple grooves through multiple linearly moving conveying grooves. The six-way balls are divided into two groups, and the two groups are staggered at an angle of 30°. Each group of balls is evenly distributed at 120°. Since there are more balls in contact between the spline shaft and the spline inner sleeve, the ball spline can run more smoothly and reliably, with higher transmission efficiency, especially more obvious during high-speed operation. At the same time, the loss of the balls is reduced, and the service life is improved. Also, with the same shaft diameter, larger ball sizes can be used for the balls. Because the rolling surface of the steel ball is processed into an R groove shape approximately equal to the radius of the steel ball, the contact area of the steel ball is large, so it has a strong bearing capacity for radial loads, enabling the spline pair to transmit greater torque and dynamic loads, and can fully cope with harsh and complex working conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the following drawings are some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0014] Figure 1 It is a schematic three-dimensional structure diagram of the whole of the present utility model;

[0015] Figure 2 It is a schematic three-dimensional sectional structure diagram of the whole of the present utility model;

[0016] Figure 3 It is a schematic three-dimensional structure diagram of the cylindrical outer sleeve of the present utility model;

[0017] Figure 4 It is a schematic three-dimensional structure diagram of the ball circulator of the present utility model.

[0018] In the figure: 1, spline shaft; 2, first groove; 3, cylindrical outer sleeve; 4, screw hole; 5, flange; 6, first through hole; 7, second through hole; 8, second groove; 9, first convex block; 10, ball circulator; 11, driving ball; 12, first sealing ring; 13, third groove; 14, ball groove; 15, opening groove; 16, second convex block; 17, third through hole; 18, fourth groove; 19, second sealing ring. Detailed implementation manners

[0019] To make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Apparently, the described embodiments are some, but not all, of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0020] Please refer to the attached Figure 1 - attached Figure 4 , an embodiment provided by the present utility model: a grooved internal circulation six-groove flange ball spline, including a cylindrical outer sleeve 3, on which a fourth groove 18 and a second through hole 7 are provided. One end of the cylindrical outer sleeve 3 is fixedly connected to a flange plate 5, on which a screw hole 4 is provided. A first convex block 9 is fixedly connected inside the cylindrical outer sleeve 3, and a second groove 8 is provided on the first convex block 9; a first sealing ring 12 and a second sealing ring 19 are sleeved inside the cylindrical outer sleeve 3, and the first sealing ring 12 is used to cooperate with the ball circulator 10 to seal the ball circulator 10; a ball circulator 10 is sleeved inside the cylindrical outer sleeve 3, on which a ball groove 14 and an opening groove 15 are provided, and the second groove 8 is located on the ball groove 14 and the opening groove 15, and the ball groove 14 is used to install the drive ball 11; a third through hole 17 is provided on the ball circulator 10, and a second convex block 16 is fixedly connected to the ball circulator 10; drive balls 11 are arranged in the ball groove 14, and a third groove 13 is provided on the ball circulator 10. The ball circulator 10 is used to cooperate with the ball groove 14 to form an internal circulation between the opening groove 15 and the ball groove 14; a spline shaft 1 is sleeved inside the ball circulator 10, on which a first groove 2 is provided, and the first groove 2 is sleeved with the opening groove 15. The opening groove 15 is used to cooperate with the first groove 2 to make the drive ball 11 roll; a first through hole 6 is provided on the spline shaft 1, and the spline shaft 1 is used to provide the first groove 2.

[0021] Working principle: When using this utility model, first fix the flange 5 and the cylindrical outer sleeve 3 through the screw hole 4, and then push the spline shaft 1. When the spline shaft 1 is pushed, it will drive the transmission balls 11 in the opening groove 15 through the first groove 2. The transmission balls 11 will roll along the first groove 2. The transmission balls 11 in the opening groove 15 will roll into the ball groove 14, and the transmission balls 11 in the ball groove 14 will roll into the opening groove 15 to form an internal circulation, enabling the spline shaft 1 to pass through the third through-hole 17 normally. At the same time, through multiple first grooves 2, opening grooves 15, ball grooves 14 and transmission balls 11, it can transmit more stably during operation, improving the transmission efficiency. When the transmission balls 11 rotate, the first sealing ring 12 and the second sealing ring 19 in the second through-hole 7 will make both ends of the ball circulator 10 in a sealed state. Also, through the second convex block 16 and the first convex block 9, the two sides of the ball circulator 10 are in a sealed state, which can effectively prevent dust and foreign objects from falling into the ball circulator 10 and can effectively extend the service life of the transmission balls 11; among them, the first through-hole 6 is used to cooperate with the spline shaft 1 to drive and connect other objects, the second groove 8 is used to cooperate with the second convex block 16 to keep the ball circulator 10 in a sealed state, the third groove 13 is used to cooperate with the installation of the cylindrical outer sleeve 3, and the fourth groove 18 is used to fix the cylindrical outer sleeve 3.

[0022] In the description of this utility model, it should be noted that unless otherwise clearly specified and limited, the terms "installation", "connection" and "coupling" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in this utility model can be understood according to specific situations.

[0023] The device embodiments described above are only illustrative. The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they can be located in one place or distributed to multiple network units. Some or all of the modules can be selected according to actual needs to achieve the purpose of the solution of this embodiment. Those of ordinary skill in the art can understand and implement it without creative labor.

[0024] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. Grooved internal circulation six-groove flange ball spline, comprising a cylindrical outer sleeve (3), characterized in that: The outer cylinder jacket (3) is provided with a fourth groove (18) and a second through hole (7). One end of the outer cylinder jacket (3) is fixedly connected with a flange (5), and the flange (5) is provided with screw holes (4). A first convex block (9) is fixedly connected inside the outer cylinder jacket (3), and a second groove (8) is provided on the first convex block (9).

2. The grooved internal circulation six-groove flange ball spline according to claim 1, wherein: A first sealing ring (12) and a second sealing ring (19) are sleeved inside the outer cylinder jacket (3).

3. The grooved internal circulation six-groove flange ball spline according to claim 1, characterized in that: A ball circulator (10) is sleeved inside the outer cylinder jacket (3). The ball circulator (10) is provided with a ball groove (14) and an opening groove (15), and the second groove (8) is located on the ball groove (14) and the opening groove (15).

4. The grooved internal circulation six-groove flange ball spline according to claim 3, characterized in that: The ball circulator (10) is provided with a third through hole (17), and a second convex block (16) is fixedly connected to the ball circulator (10).

5. The grooved inner circulation six-groove flange ball spline according to claim 3, characterized in that: Drive balls (11) are arranged in the ball groove (14), and a third groove (13) is provided on the ball circulator (10).

6. The grooved inner circulation six-groove flange ball spline according to claim 3, characterized in that: A spline shaft (1) is sleeved inside the ball circulator (10). A first groove (2) is provided on the spline shaft (1), and the first groove (2) is sleeved with the opening groove (15).

7. The grooved internal circulation six-groove flange ball spline according to claim 6, characterized in that: A first through hole (6) is provided on the spline shaft (1).

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