KR-102963746-B1 - BALL SPLINE WITH LUBRICATION PASSAGE

KR102963746B1KR 102963746 B1KR102963746 B1KR 102963746B1KR-102963746-B1

Abstract

A ball spline having a lubrication path according to the present invention comprises a spline shaft, an outer tube, and two recirculation members. The outer tube is displaceably fitted onto the spline shaft and forms a load passage in which a ball is installed between the spline shaft and the outer tube. An oil guide passage is provided inside the outer tube. Two recirculation members are installed on two outer end surfaces of the outer tube, through which the spline shaft passes. Each recirculation member is provided with an oil injection hole, an oil storage groove, and an oil guide section. The oil storage groove communicates with the oil injection hole, the load passage, and the oil guide passage. The oil guide section is formed within the oil storage groove, corresponds to the oil injection hole, and protrudes in the direction of the oil guide passage. Thus, when lubricating oil is injected into the oil injection hole of one of the recirculation members, the lubricating oil lubricates the balls on both sides through the cooperation of the oil guide section and the oil guide passage, thereby improving the lubrication effect.

Inventors

량 위-민
좡 하오-디
차이 상-화

Assignees

하이윈 테크놀로지스 코포레이션

Dates

Publication Date: 20260511
Application Date: 20231204

Claims (9)

It includes a spline shaft, an outer casing, two circulating members, and a plurality of balls, The outer surface of the above spline shaft is provided with a first rolling groove; The outer tube is displaceably fitted onto the spline shaft, and the inner surface of the outer tube is provided with a second rolling groove, and the space between the second rolling groove of the outer tube and the first rolling groove of the spline shaft forms a load passage, and the outer tube is provided with a non-load passage and an oil guide passage inside, and both ends of the non-load passage and both ends of the oil guide passage penetrate two mutually opposing outer surfaces of the outer tube; The two recirculation members are each installed on the outer end surface of the outer tube and the spline shaft passes through them; each of the recirculation members is provided with a recirculation groove, an oil injection hole, an oil storage groove, and an oil guide; both ends of the recirculation groove are each connected to the load passage and the non-load passage to form a circulation passage together; the oil storage groove communicates with the oil injection hole, the load passage, and the oil guide passage of the outer tube; and the oil guide is formed in the oil storage groove, corresponds to the oil injection hole, and protrudes toward the direction of the oil guide passage; The above plurality of balls are installed within a circulation passage, and Each of the above-mentioned oil guides is provided with a first stage, a second stage, and a guide inclined surface, wherein the first stage is connected to the groove wall of the oil storage groove, the second stage is formed adjacent to the oil guide passage, and the guide inclined surface faces the oil injection hole and slopes downward from the first stage toward the second stage, and furthermore, the position of the guide inclined surface is located higher than the bottom surface of the oil guide passage. Ball spline equipped with a lubrication channel.
In paragraph 1, A ball spline having a lubricating channel, wherein the width of each of the above oil guide sections gradually decreases from the first stage toward the second stage.
In paragraph 2, A ball spline having a lubrication path, wherein the width of the second stage of each of the above oil guide sections is smaller than or equal to the width of the oil guide passage.
In any one of paragraphs 1 through 3, A ball spline having a lubrication path, wherein each of the two opposing sides of the oil guide portion has a recess.
In paragraph 1, A ball spline having a lubrication path, wherein each of the outer cross-sections of the above outer tube is provided with a lubrication path, and the lubrication path is in communication with the second rolling groove and the oil storage groove.
In paragraph 5, A ball spline having a lubrication path, the above lubrication path being closer to the spline axis than the above oil guide path.
In paragraph 1, The above oil guide passage is a ball spline having a lubricating passage that extends along the axial direction of the spline axis.
In paragraph 1, The above oil guides are ball splines having lubricating channels that are pointed, square, or arc-shaped.
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Description

Ball spline with lubrication passage The present invention relates to a ball spline, and in particular to a ball spline having a lubrication channel. The ball spline disclosed in TW M615588 comprises a body and two end covers installed at both ends of the body, wherein the body comprises a metal tube and two plastic holders, the metal tube comprises two through channels, and the two plastic holders are installed facing each other within the metal tube. Additionally, an inner channel is provided at the outer edge of each of the two plastic holders, and the inner channel and the through channel communicate with each other to form a transmission channel. Thus, lubricating oil flows from the through channel to the inner channel, then along the inner channel through an extended channel to reach the direction change channel of the end cover, and further lubricates the ball passing through this area. However, in the above patent, since the outer edge of the plastic holder is in close contact with the inner surface of the metal container, if the oil injection pressure is excessively high, the outer edge of the plastic holder may be pushed away and separated from the inner surface of the metal container, which may cause an oil leakage problem. FIG. 1 is a perspective view of a ball spline having a lubrication channel according to the present invention. FIG. 2 is an exploded perspective view of a ball spline having a lubrication channel according to the present invention. FIG. 3 is a cross-sectional view of a ball spline having a lubrication channel according to the present invention. FIG. 4 is an exploded perspective view of an outer tube and a circulating member provided in a ball spline having a lubricating channel according to the present invention. FIG. 5 is an exploded perspective view of the outer tube and the recirculation member provided in a ball spline having a lubricating channel according to the present invention, viewed from a different angle. FIG. 6 is a partial enlarged view of a recirculation member provided in a ball spline having a lubricating channel according to the present invention. FIG. 7 is a partial cross-sectional view of a ball spline having a lubrication channel according to the present invention. Figure 8 is a cross-sectional view along line 8-8 of Figure 7. Fig. 9a is similar to Fig. 6 and mainly shows a different type of reflux member. Fig. 9b is a plan view of Fig. 9a. Fig. 10a is similar to Fig. 9a and mainly shows another type of reflux member. Fig. 10b is a plan view of Fig. 10a. Fig. 11a is similar to Fig. 10a and mainly shows another type of reflux member. Fig. 11b is a plan view of Fig. 11a. Fig. 12a is similar to Fig. 11a and mainly shows another type of reflux member. Fig. 12b is a plan view of Fig. 12a. Fig. 13a is similar to Fig. 12a and mainly shows another type of reflux member. Fig. 13b is a plan view of Fig. 13a. The applicant first explains that in the entire specification, including the embodiments and claims described below, all terms relating to directionality are based on the direction in the drawings. Additionally, the reference numerals of identical components in the embodiments and drawings described below indicate identical or similar components or structural features thereof. Referring to FIG. 1 and FIG. 2, a ball spline (10) having a lubrication path according to the present invention includes a spline shaft (20), an outer tube (30), two circulating members (40), two dust-preventing members (50), and a plurality of balls (60). The outer surface of the spline shaft (20) is provided with two pairs of first rolling grooves (22), and each first rolling groove (22) extends along the axial direction of the spline shaft (20). The outer tube (30) is provided with two mutually opposing outer surfaces (31) and an axial hole (32) penetrating these outer surfaces (31), and the outer tube (30) is fitted onto a spline shaft (20) through the axial hole (32) and can be displaced along the axial direction of the spline shaft (20). Two pairs of second rolling grooves (33) are provided on the wall of the axial hole (32), and the second rolling grooves (33) of the outer tube (30) and the first rolling grooves (22) of the spline shaft (20) correspond to each other to form a load passage (62) (as shown in FIG. 3). Additionally, the outer tube (30) further comprises two pairs of non-load passages (34) and two oil guide passages (35), each non-load passage (34) and each oil guide passage (35) extend along the axial direction of the spline shaft (20) and penetrate the outer cross-sections (31) of the outer tube (30). Also, as shown in FIGS. 4 and 5, each outer cross-section (31) of the outer tube (30) comprises two lubrication passages (36) facing each other, the lubrication passages (36) being closer to the spline shaft (20) than the oil guide passages (35), and both ends of the lubrication passages (36) communicating with one pair of second rolling grooves (33). Two circulating memb