Groove type internal circulation six-groove ball spline
By designing grooved inner circulating six-tree ball splines and adopting multi-chute and steel ball structure, the problems of large size and waste of materials of linear ball splines are solved, and the transmission capacity and service life of torque and load are improved.
Patent Information
- Application Number
- CN202421016574.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-10
- Publication Date
- 2024-12-17
- Estimated Expiration
- 2034-05-10
AI Technical Summary
When existing linear ball splines transmit larger loads and torque, they are too large in size and wasteful of materials, resulting in increased costs, and the cyclic structure of the ball needs to be improved.
The grooved inner circulation six-tree ball spline is designed, and the structure of six slides and multiple steel balls is adopted, which increases the number and stiffness of the balls, and improves the dustproof effect through the inner circulation design and increases the contact area. Carrying greater torque and dynamic loads.
It achieves higher operating stability and transmission efficiency, improves torque and load transmission capabilities, and extends service life.
Smart Images
Figure CN222185483U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of mechanical transmission devices, in particular to a groove type internal circulation six-groove ball spline. Background Art
[0002] The ball spline group is a linear guide device that performs linear motion on the spline shaft through an outer cylinder. The structure in which the balls in the ball spline group roll relative to the spline shaft in the ball groove can make the relative movement between the ball spline group and the spline shaft smoother and greatly improve the load capacity. Linear ball splines generally have two second oil grooves and four second oil grooves. In order to transmit greater loads and torque, the spline shafts are made very large, which not only wastes materials and increases costs, but also causes the size of the ball spline to be too large. Therefore, it is necessary to change the circulation structure of the balls, so a grooved internal circulation six-groove ball spline is proposed. Utility Model Content
[0003] The utility model aims to provide a groove type internal circulation six-groove ball spline to solve the problems raised in the above background technology.
[0004] In order to solve the above technical problems, the utility model provides the following technical solutions: a grooved internal circulation six-groove ball spline, comprising a spline shaft, a ball rack is sleeved on the spline shaft, a bushing is sleeved on the ball rack, three first protrusions and three first grooves are evenly distributed on the ball rack, and the first protrusions and the first grooves are arranged at intervals, two first ball grooves are provided on the first protrusion, two through grooves are provided in the first groove, and the two ends of the first ball groove are respectively conductively connected to the two ends of the adjacent through grooves, and steel balls are installed in the first ball groove and the through groove.
[0005] Preferably, a slide groove is opened at a position corresponding to the through groove on the spline shaft, and the steel ball is rollingly connected in the slide groove, the outer diameter of the bushing is 47 mm, the diameter of the spline shaft is 30 mm, the R angle radius of the slide groove is 1.75 mm, the angle between the slide groove and its adjacent slide groove is 30°, and the angle between the slide groove and another adjacent slide groove is 90°.
[0006] Preferably, a second groove is provided in the bushing at a position corresponding to the first protrusion, and a second protrusion is arranged in the bushing at a position corresponding to the first groove.
[0007] Preferably, a second ball groove is provided on the second protrusion at a position corresponding to the through groove.
[0008] Preferably, a second oil groove is provided on the bushing, an oil hole is provided in the second oil groove at a position corresponding to the first protrusion, a first oil groove is provided at a position corresponding to the oil hole on the first protrusion, and both ends of the first oil groove are respectively connected to the two first ball grooves.
[0009] Preferably, dustproof sheets are provided at both ends of the ball cage, and the dustproof sheets are sleeved on the spline shaft, and a mounting groove is opened in the bushing at a position corresponding to the dustproof sheet, and the dustproof sheet is sleeved in the mounting groove.
[0010] Preferably, a third protrusion is provided at a position on the dustproof sheet corresponding to the slide groove, and the third protrusion is slidably connected in the slide groove.
[0011] The grooved internal circulation six-groove ball spline provided by the utility model has the following advantages: the spline shaft of the utility model adopts a six-slide groove design, thereby increasing the number of balls, making the operation more stable and reliable, the transmission efficiency higher, and the stiffness of the spline shaft improved; the slide groove adopts a design close to the radius of the second steel ball, so that the contact area of the steel ball is increased, and the bearing capacity for radial load is improved, thereby being able to transmit greater torque and dynamic load; and the steel balls of the utility model adopt an internal circulation design, have a good dustproof effect, and greatly improve the service life. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0013] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the utility model;
[0014] Figure 2 It is an exploded view of the overall three-dimensional structure of the utility model;
[0015] Figure 3 It is a schematic diagram of the cross-sectional structure of the ball carrier of the utility model;
[0016] Figure 4 It is a schematic diagram of the cutaway structure of the bushing of the utility model in side view.
[0017] In the figure: 1, spline shaft; 11, slide groove; 2, ball cage; 21, first protrusion; 22, first oil groove; 23, first ball groove; 24, first groove; 25, through groove; 3, bushing; 31, second oil groove; 32, oil hole; 33, second protrusion; 34, second ball groove; 35, second groove; 36, mounting groove; 4, dust sheet; 41, third protrusion; 5, steel ball. DETAILED DESCRIPTION
[0018] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all the embodiments. Based on the embodiment of 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.
[0019] See also Figure 1-4The utility model provides an embodiment: a groove-type internal circulation six-groove ball spline, comprising a spline shaft 1, a ball rack 2 is sleeved on the spline shaft 1, a bushing 3 is sleeved on the ball rack 2, three first protrusions 21 and three first grooves 24 are evenly distributed on the ball rack 2, and the first protrusions 21 and the first grooves 24 are arranged at intervals, two first ball grooves 23 are provided on the first protrusion 21, two through grooves 25 are provided in the first groove 24, and the two ends of the first ball groove 23 are respectively conductively connected with the two ends of the adjacent through grooves 25, and steel balls 5 are installed in the first ball groove 23 and the through groove 25, and the spline shaft 1 is used to guide the ball rack 2 , the ball rack 2 is used to install the steel ball 5, the bushing 3 is used to limit the steel ball 5, the first ball groove 23 and the through groove 25 are used to accommodate the steel ball 5; a slide groove 11 is opened at a position corresponding to the through groove 25 on the spline shaft 1, and the steel ball 5 is rollingly connected in the slide groove 11, the outer diameter of the bushing 3 is 47mm, the diameter of the spline shaft 1 is 30mm, the R angle radius of the slide groove 11 is 1.75mm, the angle between the slide groove 11 and its adjacent slide groove 11 is 30°, the angle between the slide groove 11 and its other adjacent slide groove 11 is 90°, the slide groove 11 is used to accommodate the steel ball 5, and a large R angle radius can increase the contact area with the steel ball 5; the bushing A second groove 35 is provided in the sleeve 3 at a position corresponding to the first protrusion 21, and a second protrusion 33 is provided in the bushing 3 at a position corresponding to the first groove 24. The second groove 35 is used to cooperate with the first protrusion 21, and the second protrusion 33 is used to cooperate with the first groove 24 to achieve a guiding function; a second ball groove 34 is provided on the second protrusion 33 at a position corresponding to the through groove 25, and the second ball groove 34 is used to accommodate the steel ball 5; a second oil groove 31 is provided on the bushing 3, and an oil hole 32 is provided in the second oil groove 31 at a position corresponding to the first protrusion 21, and a first oil groove 22 is provided on the first protrusion 21 at a position corresponding to the oil hole 32, and the first oil groove The two ends of 22 are respectively connected to the two first ball grooves 23, the oil hole 32 is used to inject lubricating oil, and the second oil groove 31 and the first oil groove 22 are both flow channels for lubricating oil; dustproof sheets 4 are provided at both ends of the ball rack 2, and the dustproof sheets 4 are sleeved on the spline shaft 1, and a mounting groove 36 is opened at the position corresponding to the dustproof sheet 4 in the bushing 3, and the dustproof sheet 4 is sleeved in the mounting groove 36, and the dustproof sheet 4 is used to prevent dust from entering the bushing 3; a third protrusion 41 is provided on the dustproof sheet 4 at a position corresponding to the slide groove 11, and the third protrusion 41 is slidably connected in the slide groove 11, and the third protrusion 41 is used to seal the slide groove 11 to prevent dust from entering the bushing 3.
[0020] Working principle: When assembling and using the utility model, the steel ball 5 is installed in the first ball groove 23 and the through groove 25, and then the ball rack 2 is installed in the bushing 3, so that the first protrusion 21 is sleeved in the second groove 35, and the second protrusion 33 is sleeved in the first groove 24, the dust sheet 4 is installed in the installation groove 36, and the spline shaft 1 is sleeved in the ball rack 2. When in use, the ball rack 2 slides along the spline shaft 1, and the steel ball 5 rolls in the rolling surface formed by the second ball groove 34, the through groove 25 and the slide groove 11, and the first ball groove 23 and the steel ball 5 in the through groove 25 circulates and rolls accordingly; wherein, the third protrusion 41 is used to seal the slide groove 11 to achieve dust prevention, the oil hole 32 is used to inject lubricating oil, the second oil groove 31 and the first oil groove 22 are both flow channels for lubricating oil, and the adjacent first ball groove 23 and the through groove 25 constitute a group of transmission grooves for the steel ball 5. The comparison between the utility model and the existing cylindrical ball spline is shown in the following table. It can be seen from the table that the dynamic torque of the utility model is increased by 20%, and the static torque is increased by about 25%, so it can transmit greater torque and load.
[0021]
[0022]
[0023] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, 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 a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0024] The device embodiments described above are merely illustrative, wherein the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the scheme of this embodiment. Ordinary technicians in this field can understand and implement it without paying creative labor.
[0025] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the utility model.
Claims
1. A grooved internal circulation six-groove ball spline, comprising a spline shaft (1), characterized in that: The spline shaft (1) is sleeved with a ball rack (2), the ball rack (2) is sleeved with a bushing (3), the ball rack (2) is evenly distributed with three first protrusions (21) and three first grooves (24), and the first protrusions (21) and the first grooves (24) are arranged at intervals, the first protrusions (21) are provided with two first ball grooves (23), the first grooves (24) are provided with two through grooves (25), and the two ends of the first ball groove (23) are respectively conductively connected to the two ends of adjacent through grooves (25), and steel balls (5) are installed in the first ball grooves (23) and the through grooves (25).
2. The groove type internal circulation six-groove ball spline according to claim 1, characterized in that: A slide groove (11) is provided at a position corresponding to the through groove (25) on the spline shaft (1), and the steel ball (5) is rollingly connected in the slide groove (11), the outer diameter of the bushing (3) is 47 mm, the diameter of the spline shaft (1) is 30 mm, the R angle radius of the slide groove (11) is 1.75 mm, the angle between the slide groove (11) and its adjacent slide groove (11) is 30°, and the angle between the slide groove (11) and its other adjacent slide groove (11) is 90°.
3. The groove type internal circulation six-groove ball spline according to claim 1, characterized in that: A second groove (35) is provided in the bushing (3) at a position corresponding to the first protrusion (21), and a second protrusion (33) is provided in the bushing (3) at a position corresponding to the first groove (24).
4. The groove type internal circulation six-groove ball spline according to claim 3, characterized in that: A second ball groove (34) is provided on the second convex block (33) at a position corresponding to the through groove (25).
5. The groove type internal circulation six-groove ball spline according to claim 3, characterized in that: The bushing (3) is provided with a second oil groove (31), an oil hole (32) is provided in the second oil groove (31) at a position corresponding to the first protrusion (21), a first oil groove (22) is provided in the first protrusion (21) at a position corresponding to the oil hole (32), and two ends of the first oil groove (22) are respectively conductively connected to the two first ball grooves (23).
6. The groove type internal circulation six-groove ball spline according to claim 1, characterized in that: Dustproof sheets (4) are provided at both ends of the ball carrier (2), and the dustproof sheets (4) are sleeved on the spline shaft (1); a mounting groove (36) is provided in the bushing (3) at a position corresponding to the dustproof sheet (4), and the dustproof sheet (4) is sleeved in the mounting groove (36).
7. The groove type internal circulation six-groove ball spline according to claim 6, characterized in that: A third protrusion (41) is provided on the dustproof sheet (4) at a position corresponding to the slide groove (11), and the third protrusion (41) is slidably connected in the slide groove (11).