Stroke-limited bushing cylinder ball spline

Abstract

The utility model discloses a stroke-limited bushing cylinder ball spline which comprises a sliding sleeve, a key groove is formed in the sliding sleeve, a bushing body is connected in the sliding sleeve in a sleeved mode, sealing rings are arranged at the two ends of the bushing body, the sealing rings are connected in the sliding sleeve in a sleeved mode, a spline shaft is connected in the bushing body in a sleeved mode, and the sealing rings are connected to the spline shaft in a sliding mode. A plurality of sliding grooves are formed in the spline shaft, a plurality of ball grooves are formed in the positions, corresponding to the sliding grooves, of the lining body, ball bodies are arranged in the ball grooves, and the ball bodies are connected into the sliding grooves in a rolling mode; the ball bodies are installed through the ball grooves which are formed in the bush body and separated from one another, direct contact between the ball bodies is avoided, rolling resistance is effectively reduced, and the service life is prolonged; the bushing body is simple in structure and low in manufacturing cost and assembling difficulty, miniaturization and light weight of products can be achieved easily, and the urgent requirements of the modern industry for efficient, economical and miniaturized ball splines are met.

Description

Technical Field

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

[0002] As a precision mechanical transmission component, the core function of a ball spline is to provide stable and flexible linear motion guiding ability while accommodating the needs of rotational motion, and it is widely used in high-precision fields such as industrial automation, precision machine tools, aerospace, and robotics. The existing ball splines mainly consist of a core shaft body, a precision spline sleeve, numerous balls, and a complex ball circulation mechanism. Although this design can perfectly integrate the dual characteristics of linear and rotational motion, its inherent complexity brings the following disadvantages: First, the uninterrupted rolling mechanism of the balls within the circulating parts, while ensuring the smoothness of motion, greatly increases the manufacturing precision requirements and installation difficulty of the components, thereby driving up the overall cost of the product. In addition, the complex structural layout inevitably increases the volume and weight of the product, which is undoubtedly a limiting factor for modern mechanical equipment pursuing lightweight and miniaturized designs; Second, the mutual contact between the balls generates additional frictional resistance during the rolling process, and the increase in resistance accelerates the wear of the balls and the circulating parts, thus shortening the service life of the entire system. Summary of the Utility Model

[0003] The purpose of the utility model is to provide a limited-program bushing cylindrical ball spline to solve the problems raised in the above background art.

[0004] To solve the above technical problems, the utility model provides the following technical solution: A limited-program bushing cylindrical ball spline, including a sliding sleeve, a keyway is opened on the sliding sleeve, a bushing body is sleeved inside the sliding sleeve, sealing rings are arranged at both ends of the bushing body, and the sealing rings are sleeved inside the sliding sleeve. A spline shaft is sleeved inside the bushing body, and the sealing rings are slidably connected to the spline shaft. Multiple chutes are opened on the spline shaft, and multiple ball grooves are opened on the bushing body at positions corresponding to the chutes. Ball bodies are arranged in the ball grooves, and the ball bodies are rollingly connected to the chutes.

[0005] Preferably, a through hole is opened on the spline shaft, and second conical surfaces are opened at both ends of the through hole.

[0006] Preferably, a groove is opened on the sliding sleeve at the position corresponding to the sealing ring, and the sealing ring is installed in the groove.

[0007] Preferably, a slider is fixedly connected to the inner wall of the sealing ring at the position corresponding to the chute, and the slider is slidably connected to the chute.

[0008] Preferably, first conical surfaces are opened at both ends of the sliding sleeve.

[0009] Preferably, the outer diameter of the bushing body is 13.8 mm and the inner diameter is 12.2 mm.

[0010] Preferably, the keyway is a waist-shaped groove with a length of 15 mm, a depth of 1.8 mm, and a width of 3 mm.

[0011] Preferably, the diameter of the spline shaft is 12 mm and the diameter of the through hole is 6 mm.

[0012] Preferably, the depth of the groove is 1 mm, the width is 1 mm, and the thickness of the sealing ring is 0.9 mm.

[0013] Preferably, the outer diameter of the sliding sleeve is 21 mm, the inner diameter is 14 mm, and the length is 35 mm.

[0014] The limited-program bushing cylindrical ball spline provided by the present utility model has the following advantages: The present utility model uses the mutually separated ball grooves on the bushing body to install the ball bodies, avoiding the direct contact between the ball bodies, effectively reducing the rolling resistance, and improving the service life; the bushing body of the present utility model has a simple structure, low manufacturing cost and assembly difficulty, which is conducive to the miniaturization and lightweight of the product, and meets the urgent needs of modern industry for efficient, economical and miniaturized ball splines. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] 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 drawings in the following description are some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0016] Figure 1 It is a schematic perspective view of the overall structure of the present utility model;

[0017] Figure 2 It is a schematic top view of the overall structure of the present utility model;

[0018] Figure 3 It is an exploded view of the overall three-dimensional structure of the present utility model;

[0019] Figure 4 It is Figure 3 The enlarged view of the structure of area A in

[0020] In the figure: 1. Sliding sleeve; 11. Keyway; 12. First round table surface; 13. Groove; 14. Sealing ring; 15. Slide block; 2. Bushing body; 21. Ball groove; 22. Ball body; 3. Spline shaft; 31. Slide groove; 32. Through hole; 33. Second round table surface. Detailed implementation mode

[0021] In order 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.

[0022] Please refer to the attached Figure 1 - attached Figure 4 , an embodiment provided by the present utility model: a limited-program bushing cylindrical ball spline, including a sliding sleeve 1, a keyway 11 is provided on the sliding sleeve 1, a bushing body 2 is sleeved inside the sliding sleeve 1, sealing rings 14 are provided at both ends of the bushing body 2, and the sealing rings 14 are sleeved inside the sliding sleeve 1. A spline shaft 3 is sleeved inside the bushing body 2, and the sealing ring 14 is slidably connected to the spline shaft 3. A plurality of sliding grooves 31 are provided on the spline shaft 3, and a plurality of ball grooves 21 are provided on the bushing body 2 at positions corresponding to the sliding grooves 31. A ball body 22 is provided in the ball groove 21, and the ball body 22 is rollingly connected to the sliding groove 31. The ball body 22 is used to reduce the resistance when the sliding sleeve 1 and the spline shaft 3 perform relative movement. The bushing body 2 is used to separate the spline shaft 3 and the sliding sleeve 1. The ball groove 21 and the sliding groove 31 are used to accommodate the ball body 22. The sealing ring 14 is used for dust prevention. The keyway 11 is used for installing a key; a through hole 32 is provided on the spline shaft 3, and second conical surfaces 33 are provided at both ends of the through hole 32. The through hole 32 is used to reduce the weight of the spline shaft 3, and the second conical surface 33 is used to reduce stress concentration; a groove 13 is provided inside the sliding sleeve 1 at a position corresponding to the sealing ring 14, and the sealing ring 14 is installed in the groove 13. The groove 13 is used to accommodate the sealing ring 14; a slider 15 is fixedly connected to the inner wall of the sealing ring 14 at a position corresponding to the sliding groove 31, and the slider 15 is slidably connected to the sliding groove 31. The slider 15 is used to close the sliding groove 31; first conical surfaces 12 are provided at both ends of the sliding sleeve 1. The first conical surface 12 is used to reduce stress concentration; the outer diameter of the bushing body 2 is 13.8 mm, and the inner diameter is 12.2 mm; the keyway 11 is a waist-shaped groove, with a length of 15 mm, a depth of 1.8 mm, and a width of 3 mm; the diameter of the spline shaft 3 is 12 mm, and the diameter of the through hole 32 is 6 mm; the depth of the groove 13 is 1 mm, the width is 1 mm, and the thickness of the sealing ring 14 is 0.9 mm; the outer diameter of the sliding sleeve 1 is 21 mm, the inner diameter is 14 mm, and the length is 35 mm.

[0023] Working principle: When using the present utility model, the sliding sleeve 1 makes linear and rotational motions relative to the spline shaft 3 through the ball body 22. The bushing body 2 is used to separate the spline shaft 3 and the sliding sleeve 1, and accommodates the ball body 22 through the ball groove 21. The sliding groove 31 is used to accommodate the ball body 22, the through hole 32 is used to reduce the weight of the spline shaft 3, the groove 13 is used to accommodate the sealing ring 14, the sealing ring 14 is used for dust prevention, the sealing ring 14 closes the sliding groove 31 through the slider 15, the key groove 11 is used for installing a key, and the first circular table surface 12 and the second circular table surface 33 are used to reduce stress concentration.

[0024] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection" and "connection" 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 the present utility model can be understood according to specific situations.

[0025] The device embodiments described above are merely 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.

[0026] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present utility model, rather than to limit them; although the present utility model 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 recorded in the foregoing embodiments, or perform equivalent replacements for 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 embodiments of the present utility model.

Claims

1. Limited-program bushing cylindrical ball spline, including a sliding sleeve (1), characterized in that: A keyway (11) is formed on the sliding sleeve (1). A bushing body (2) is sleeved inside the sliding sleeve (1). Sealing rings (14) are arranged at both ends of the bushing body (2), and the sealing rings (14) are sleeved inside the sliding sleeve (1). A spline shaft (3) is sleeved inside the bushing body (2), and the sealing rings (14) are slidably connected to the spline shaft (3). A plurality of sliding grooves (31) are formed on the spline shaft (3). A plurality of ball grooves (21) are formed on the bushing body (2) at positions corresponding to the sliding grooves (31). Ball bodies (22) are arranged inside the ball grooves (21), and the ball bodies (22) are rollingly connected to the sliding grooves (31).

2. The limited-program bushing cylindrical ball spline according to claim 1, characterized in that: A through hole (32) is formed on the spline shaft (3), and second conical surfaces (33) are formed at both ends of the through hole (32).

3. The limited-program bushing cylindrical ball spline according to claim 1, characterized in that: A groove (13) is formed inside the sliding sleeve (1) at a position corresponding to the sealing ring (14), and the sealing ring (14) is installed inside the groove (13).

4. The limited-program bushing cylindrical ball spline according to claim 3, characterized in that: Sliders (15) are fixedly connected to the inner wall of the sealing ring (14) at positions corresponding to the sliding grooves (31), and the sliders (15) are slidably connected to the sliding grooves (31).

5. The limited-program bushing cylindrical ball spline according to claim 3, characterized in that: First conical surfaces (12) are formed at both ends of the sliding sleeve (1).

6. The limited-program bushing cylindrical ball spline according to claim 1, characterized in that: The outer diameter of the bushing body (2) is 13.8 mm, and the inner diameter is 12.2 mm.

7. The limited-program bushing cylindrical ball spline according to claim 1, characterized in that: The keyway (11) is a waist-shaped groove with a length of 15 mm, a depth of 1.8 mm, and a width of 3 mm.

8. The limited-program bushing cylindrical ball spline according to claim 2, characterized in that: The diameter of the spline shaft (3) is 12 mm, and the diameter of the through hole (32) is 6 mm.

9. The limited-program bushing cylindrical ball spline according to claim 3, wherein: The depth of the groove (13) is 1 mm, the width is 1 mm, and the thickness of the sealing ring (14) is 0.9 mm.

10. The limited-program bushing cylindrical ball spline according to claim 5, characterized in that: The outer diameter of the sliding sleeve (1) is 21 mm, the inner diameter is 14 mm, and the length is 35 mm.

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