A ball spline with an oil injection structure

Abstract

This utility model provides a ball spline with an oil injection structure, relating to the field of ball spline technology. The ball spline with an oil injection structure includes a spline shaft, a spline sleeve fitted in the middle of the spline shaft, an oil groove on the circumference of the spline sleeve, an oil inlet on the inner surface of the oil groove, a positioning component on a rotating ring connected to the oil groove, and an oil inlet corresponding to the oil inlet through the surface of the rotating ring. In this utility model, by rotating a screw, the screw moves downward in conjunction with the screw sleeve, causing a positioning pin to be positioned inside a positioning hole. When the positioning pin is positioned inside the positioning hole, the oil inlet and the oil inlet are aligned, allowing lubricating oil to be supplied from the oil inlet to the oil inlet. When oil injection is not required, the operator repeats the above operation to position the positioning pin inside the oil inlet, preventing lubricating oil from flowing out of the spline sleeve.

Description

Technical Field

[0001] This utility model relates to the field of ball spline technology, and more specifically, to a ball spline with an oil injection structure. Background Technology

[0002] A ball spline is a mechanical device that achieves high-precision linear motion and torque transmission by rolling balls in grooves. It is mainly used in precision transmission scenarios such as robots and automated equipment. For example, patent application number CN202422030736.5 describes a ball spline comprising a spline shaft, an outer cylinder, a first end cap, a ball-feeding cover plate, a second end cap, and multiple balls. The outer cylinder is displaceably fitted onto the spline shaft. The first and second end caps are respectively located on two opposite end faces of the outer cylinder. The first end cap has a ball-feeding port, and the ball-feeding cover plate is located on the outer side of the first end cap and is detachably attached to the first end cap. The balls circulate among the spline shaft, outer cylinder, first end cap, ball-feeding cover plate, and second end cap. Therefore, the ball spline of this utility model can be loaded with balls through the ball inlet by removing the ball inlet cover plate, thereby improving assembly efficiency and achieving the effect of automated assembly. The spline sleeve is equipped with a lubricating oil inlet. Currently, the lubricating oil inlet is directly exposed to the outside. During operation, the lubricating oil will splash out from the inlet, resulting in the waste of lubricating oil. Utility Model Content

[0003] The main objective of this invention is to provide a ball spline with an oil injection structure, which can effectively solve the problem in the prior art where the oil inlet is directly exposed, causing oil to splash out during operation and resulting in oil waste.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a ball spline with an oil injection structure, including a spline shaft, a spline sleeve is sleeved and installed in the middle of the spline shaft, an oil groove is formed on the circumferential surface of the spline sleeve, an oil inlet is formed on the inner surface of the oil groove, a rotating ring is rotatably installed inside the oil groove, a positioning component is provided on the rotating ring and connected to the oil groove, and an oil inlet corresponding to the oil inlet is formed through the surface of the rotating ring.

[0005] Preferably, the inner wall of the oil trench is provided with a sliding groove.

[0006] Preferably, a slider is fixedly installed on the side of the rotating ring, and the slider is slidably disposed inside the groove.

[0007] Preferably, the positioning component includes a screw sleeve and a positioning hole, the screw sleeve being installed on the circumferential surface of the rotating ring, and the positioning hole being formed on the inner surface of the oil groove.

[0008] Preferably, a screw is fitted inside the center of the threaded sleeve.

[0009] Preferably, a positioning post is installed at the lower end of the screw, and the positioning post is disposed in the positioning hole.

[0010] Compared with the prior art, the present invention has the following beneficial effects:

[0011] (1) By having the operator slide the rotating ring, the slider can slide to the other end inside the groove, and at the same time, the positioning pin can be moved into the positioning hole. At this time, by having the operator rotate the screw, the screw and the screw sleeve can be moved downward, so that the positioning pin is set inside the positioning hole. When the positioning pin is set inside the positioning hole, the oil inlet and the oil passage inlet will be set together. At this time, lubricating oil can be delivered from the oil inlet to the oil passage inlet. When oil is not needed, by having the operator repeat the above operation, the positioning pin can be set inside the oil passage inlet, which can block the oil passage inlet and prevent lubricating oil from flowing out from the spline sleeve. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of a ball spline with an oil injection structure according to the present invention;

[0013] Figure 2 This is a side view schematic diagram of the overall structure of a ball spline with an oil injection structure according to the present invention;

[0014] Figure 3 This is a schematic diagram of a spline sleeve structure with an oil injection structure for a ball spline according to the present invention;

[0015] Figure 4 This is a schematic diagram of the rotating ring structure of a ball spline with an oil injection structure according to the present invention.

[0016] In the diagram: 1. Splined shaft; 2. Splined sleeve; 3. Rotary ring; 4. Oil inlet; 5. Positioning assembly; 501. Screw sleeve; 502. Screw; 503. Positioning hole; 504. Positioning pin; 6. Oil groove; 7. Oil inlet; 8. Slide groove; 9. Slider. Detailed Implementation

[0017] The technical solutions of this utility model will be clearly and completely described below with reference to the embodiments of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of this utility model.

[0018] like Figure 1As shown, a ball spline with an oil injection structure includes a spline shaft 1, a spline sleeve 2 sleeved in the middle of the spline shaft 1, an oil groove 6 formed on the circumference of the spline sleeve 2, an oil inlet 7 formed on the inner surface of the oil groove 6, a rotating ring 3 rotatably mounted inside the oil groove 6, a positioning component 5 provided on the rotating ring 3 and connected to the oil groove 6, and an oil inlet 4 corresponding to the oil inlet 7 formed through the surface of the rotating ring 3.

[0019] like Figure 3 As shown, the inner wall of the oil groove 6 is provided with a sliding groove 8, and a slider 9 is fixedly installed on the side of the rotating ring 3. The slider 9 is slidably disposed inside the sliding groove 8. By sliding the slider 9 inside the sliding groove 8, the sliding groove 8 can limit the distance that the slider 9 can move, so that the rotating ring 3 can only move to a certain distance.

[0020] like Figure 2 , 3 As shown in Figure 4, the positioning component 5 includes a threaded sleeve 501 and a positioning hole 503. The threaded sleeve 501 is installed on the circumference of the rotating ring 3, and the positioning hole 503 is formed on the inner surface of the oil groove 6. A screw 502 is sleeved and installed in the middle of the inner part of the threaded sleeve 501. A positioning pin 504 is installed at the lower end of the screw 502. The positioning pin 504 is located in the positioning hole 503. When the operator rotates the screw 502, the screw 502 moves upward in conjunction with the threaded sleeve 501, which in turn drives the positioning pin 504 to move upward, causing the positioning pin 504 to disengage from the inside of the oil inlet 7. At this time, the operator slides the rotating ring 3, causing the slider 9 to slide inside the slide groove 8. At the other end, the positioning pin 504 can be moved into the positioning hole 503. At this time, the operator rotates the screw 502, which moves downward in conjunction with the screw sleeve 501, so that the positioning pin 504 is set inside the positioning hole 503. When the positioning pin 504 is set inside the positioning hole 503, the oil inlet 4 and the oil passage inlet 7 are set together. At this time, lubricating oil can be delivered from the oil inlet 4 into the oil passage inlet 7. When oil is not needed, the operator repeats the above operation to set the positioning pin 504 inside the oil passage inlet 7, which can block the oil passage inlet 7 and prevent lubricating oil from flowing out of the spline sleeve 2.

[0021] The working principle of a ball spline with an oil injection structure:

[0022] In use, when lubricating oil needs to be injected into the spline sleeve 2, the operator first rotates the screw 502, causing the screw 502 and the sleeve 501 to move upwards. This drives the positioning pin 504 to move upwards, disengaging it from the oil inlet 7. Then, the operator slides the rotating ring 3, causing the slider 9 to slide to the other end within the groove 8. This moves the positioning pin 504 into the positioning hole 503. The operator then rotates the screw 502, causing the screw 502 and the sleeve 501 to move downwards, positioning the positioning pin 504 inside the positioning hole 503. When the positioning pin 504 is positioned inside the positioning hole 503, the oil inlet 4 and the oil inlet 7 are aligned, allowing lubricating oil to be supplied from the oil inlet 4 into the oil inlet 7. When lubricating oil is not needed, the operator repeats the above operation to position the positioning pin 504 inside the oil inlet 7, effectively blocking the oil inlet 7 and preventing lubricating oil from flowing out of the spline sleeve 2.

[0023] The above embodiments of this utility model are merely examples for clearly illustrating this utility model, and are not intended to limit the implementation of this utility model. For those skilled in the art, other variations or modifications can be made based on the above description. It is impossible to exhaustively list all the implementation methods here. Any obvious variations or modifications derived from the technical solutions of this utility model are still within the protection scope of this utility model.

Claims

1. A ball spline having an oil injection structure, comprising a spline shaft (1), characterized in that: A spline sleeve (2) is fitted in the middle of the spline shaft (1). An oil groove (6) is provided on the circumference of the spline sleeve (2). An oil inlet (7) is provided on the inner surface of the oil groove (6). A rotating ring (3) is rotatably installed inside the oil groove (6). A positioning component (5) is provided on the rotating ring (3) and connected to the oil groove (6). An oil inlet (4) corresponding to the oil inlet (7) is provided through the surface of the rotating ring (3).

2. A ball spline with an oil-filling structure according to claim 1, characterized in that; The inner wall of the oil groove (6) is provided with a sliding groove (8).

3. A ball spline with an oil-filling structure according to claim 2, characterized in that: A slider (9) is fixedly installed on the side of the rotating ring (3), and the slider (9) is slidably disposed inside the groove (8).

4. A ball spline with an oil-filling structure according to claim 1, characterized in that: The positioning component (5) includes a screw sleeve (501) and a positioning hole (503). The screw sleeve (501) is installed on the circumferential surface of the rotating ring (3), and the positioning hole (503) is opened on the inner surface of the oil groove (6).

5. A ball spline with an oil-filling structure according to claim 4, characterized in that; A screw (502) is fitted inside the center of the screw sleeve (501).

6. A ball spline with an oil-filling structure according to claim 5, characterized in that: A positioning post (504) is installed at the lower end of the screw (502), and the positioning post (504) is located in the positioning hole (503).

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