CN210003686U

CN210003686U - Ball spline set with oil storage groove

Info

Publication number: CN210003686U
Application number: CN201920886502.7U
Authority: CN
Inventors: 黄凌
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-06-13
Filing date: 2019-06-13
Publication date: 2020-01-31
Anticipated expiration: 2029-06-13

Abstract

A ball spline set with oil storage groove, it includes spline shaft, 0 outer cylinder, two end cover sets and multiple balls, the said end cover sets set up at least 1 return flow channel, the two ends of the said return flow channel are 2 the circulation hole and the second circulation hole respectively, characterized by that, the said end cover sets each concave at least oil storage groove, the said oil storage groove is used for holding lubricating oil, the said oil storage groove locates at the side of the said end cover set facing to the outer cylinder, the said end cover sets each concave at least guide channel, the said guide channel connects the said oil storage groove with or their combination among the said circulation hole and the said second circulation hole, in order to guide the lubricating oil to lubricate the ball set, by this, lubricate the ball set through the lubricating oil held in the said oil storage groove, in order to achieve the friction force to reduce the ball set.

Description

Ball spline set with oil storage groove

Technical Field

The utility model discloses a related to kind of ball spline group, especially about kind of ball spline group that has the oil storage tank.

Background

The ball spline set is a linear guide device in which kinds of outer cylinders linearly move on a spline shaft, and is suitable for a mechanism that linearly moves while transmitting torque because of a structure in which steel balls roll on spline grooves.

According to the chinese patent (CN 201884466U), the patent document is a ball spline set and a spline shaft thereof, wherein the ball spline set includes: a spline shaft, an outer cylinder, a ball retainer, and balls that circulate between the elements. The ball retainer is arranged between the spline shaft and the outer cylinder, so that the balls can still maintain the positions before being assembled or when the outer cylinder is separated from the spline shaft to avoid falling.

However, in the ball spline set, the structural design of the balls and the ball retainers is limited, so that the ball retainers are quite easily damaged when the ball spline set is subjected to a high radial load for a long time, and further, the ball retainers may vibrate during the movement of the balls, particularly, the balls may fall off at a high speed, and the risk of operation of a user is caused.

Therefore, after observing the above-mentioned deficiency, the author of the present application considers that the ball spline set needs to have the necessity of having a lubrication structure, and has produced the utility model.

SUMMERY OF THE UTILITY MODEL

The main objective of the present invention is to provide ball spline sets with oil storage grooves, which lubricate the balls with the lubricating oil contained in the oil storage grooves, so as to reduce the friction of the balls.

To achieve the above object, the present invention provides a ball spline set having an oil storage groove, comprising a spline shaft, which has at least track grooves formed on a surface thereof in an axial direction of the spline shaft, 1 outer cylinder slidably fitted over the spline shaft, at least ball grooves formed on an inner surface thereof in the axial direction of the outer cylinder, at least circulation channels passing through the outer surface and the inner surface of the outer cylinder in the axial direction of the outer cylinder, the ball grooves and the track grooves forming ball passages, two end cap sets fitted over the spline shaft and respectively disposed at both ends of the outer cylinder, at least circulation channels passing through the end cap sets facing the side of the outer cylinder , both ends of the circulation channels being 68562 th circulation holes and second circulation holes, the 633 circulation holes being connected to the ball passages, the second circulation channels being connected to the circulation channels, the circulation channels forming ball circulation channels, and the ball circulation channels being contained in the ball circulation sets, and the ball circulation channels being contained in 73784 sets.

The end cover assembly is characterized in that at least oil storage grooves are concavely formed in the end cover assembly and used for containing lubricating oil, the oil storage grooves are located on the side face, facing the outer cylinder, of the end cover assembly, at least guide grooves are concavely formed in the end cover assembly and communicated with or a combination of of the oil storage grooves and the -th circulation hole and the second circulation hole to guide the lubricating oil to lubricate the ball group.

Preferably, the oil reservoir is disposed between the th circulation hole and the second circulation hole, and the guide channel communicates with the second circulation hole.

Preferably, the track groove is a groove recessed from the surface of the spline shaft toward the center of the spline shaft, and the track groove is connected from the end of the spline shaft to the other end of the spline shaft.

Preferably, the ball groove is a groove recessed from the inner surface of the outer cylinder to the outer surface of the outer cylinder, and the ball groove is communicated from the end of the outer cylinder to the other end of the outer cylinder.

Preferably, the wrench further comprises two outer covers, the outer covers are sleeved on the spline shaft, the outer covers are respectively arranged on the other side faces of the end cover group facing the side face of the outer cylinder, two through holes are respectively formed in the outer cylinder, the end cover group and the outer covers, and two locking screws penetrate through the through holes to enable the outer cylinder, the end cover group and the outer covers to be tightly combined.

Preferably, the number of the track grooves is four, and the track grooves are symmetrically arranged on the surface of the spline shaft.

Preferably, the number of the ball passages and the circulation passages is four, the number of the return passages is eight, and the ball passages, the circulation passages and the return passages together form four ball circulation passages.

Preferably, the end cap set comprises a th cap body and a second cap body, wherein the th cap body is respectively provided with at least concave parts, and the second cap body is respectively provided with at least convex parts matched with the concave parts in a protruding way.

Preferably, the depression is , the arc-shaped grooves, the protrusions are respectively provided with second arc-shaped grooves, and the arc-shaped grooves and the second arc-shaped grooves are combined into the backflow channel.

Preferably, wherein the end of the outer cylinder has a flange portion, the flange portion projects from the inner surface of the outer cylinder toward the outer surface of the outer cylinder.

The utility model provides a ball spline assembly with oil storage tank sees through this lubricating oil of this oil storage tank holding, guides this ball group of this lubricating oil moisturizing by this guide way, by this, the utility model discloses this oil storage tank can directly provide this lubricating oil to this ball group to reduce the frictional force between this ball group and this spline shaft, its life that improves this ball spline group, in addition, the utility model discloses an oil storage tank is concave to be located end cover group is in the face of the side of this urceolus, end cover group and this urceolus combine closely, so can decide the water vapor, dust and foreign matter in the degree ground isolation environment, thereby avoid this lubricating oil and water vapor to mix, make this lubricating oil rotten, roll over the lubricated effect of loss.

Drawings

Fig. 1 is a perspective view of an embodiment of the present invention.

Fig. 2 is an exploded view of an embodiment of the present invention.

Fig. 3a is a schematic cross-sectional view taken along line a-a of fig. 1.

Fig. 3b is a partial enlarged view of fig. 3 a.

Fig. 4 is a partial cross-sectional view of an embodiment of the invention.

Fig. 5 is an end cap assembly perspective view of an embodiment of the invention.

Fig. 6 is an exploded view of an end cap according to an embodiment of the present invention.

Fig. 7 is a perspective view of a second embodiment of the present invention.

Wherein the reference numerals are as follows:

100 ball spline set with oil reservoir

10 spline shaft

11 track groove

20 outer cylinder

21 ball groove

22 circulation channel

23 Flange part

30 end cap group

31 st circulation hole

32 second circulation hole

33 oil storage tank

331 lubricating oil

34 guide channel

35 th cover body

351 concave part

3511 th arc-shaped groove

36 second cover body

361 projection

3611 second arc groove

40 ball group

401 ball

50 ball channel

60 return flow path

70 ball circulation channel

80 outer cover

81 lock screw

82 perforation

Section line A-A

B contact point

S separation line

L connecting line

Angle of theta 1

Detailed Description

Please refer to fig. 1, which is a perspective view of an embodiment of the present invention, and fig. 2 and fig. 5, which are exploded views of an embodiment of the present invention and a perspective view of an end cap assembly, the present invention discloses a ball spline assembly 100 with an oil storage tank, which includes a spline shaft 10, on the surface of the spline shaft 10, at least track grooves 11 are formed along the axial direction of the spline shaft 10. in this embodiment, the track grooves 11 are recessed from the surface of the spline shaft 10 toward the center point of the spline shaft 10, the track grooves 11 are connected from the end of the spline shaft 10 to the other end of the spline shaft 10, the spline shaft 10 is provided with four track grooves 11 on the surface of the spline shaft 10, the number of the track grooves 11 is not limited by this, and depends on the application requirements, in other embodiments, the spline shaft 10 may have another number of track grooves 11, in the aspect of manufacturing, a grinding device may be used to simultaneously perform grinding operations on the spline shaft 10, and four track grooves 11 may be formed in times.

outer cylinder 20, the outer cylinder 20 can also be called spline nut, it is a cylindrical metal piece with two open ends, the clearance between the outer cylinder 20 and the spline shaft 10 can be 0.05 mm to 1 mm, but the invention is not limited by this, the outer cylinder 20 is slidingly sleeved on the spline shaft 10, at least ball grooves 21 are opened on the inner side surface of the outer cylinder 20 along the axial direction of the outer cylinder 20, at least 0 circulation channels 22 are opened between the outer side surface and the inner side surface of the outer cylinder 20 along the axial direction of the outer cylinder 20, the ball grooves 21 and the track grooves 11 form ball channels 50 correspondingly, in this embodiment, the ball grooves 21 are recessed from the inner side surface of the outer cylinder 20 to the outer side surface of the outer cylinder 20, the ball grooves 21 are communicated from end of the outer cylinder 20 to the other end of the outer cylinder 20, the outer cylinder 20 has four ball grooves 21 and four circulation channels 22, the number of the ball channels 50 is the same as that of the circulation channels 22, more specifically, the ball channels 50 are equivalent to the number of the track channels 50, the track channels 50 are equivalent to the number of the 735, the ball channels 50, the track channels corresponding to the track channels 50, the track channels are used for the .

Two end cover sets 30, the end cover sets 30 are sleeved on the spline shaft 10 and are respectively arranged at two ends of the outer cylinder 20, at least return channels 60 are respectively arranged on the side surfaces of the end cover sets 30 facing the outer cylinder 20 in a penetrating manner, two ends of each return channel 60 are respectively a st circulating hole 31 and a th second circulating hole 32, the th circulating hole 31 is connected with the ball channel 50, the second circulating hole 32 is connected with the circulating channel 22, and the return channel 60, the circulating channel 22 and the ball channel 50 jointly form a ball circulating channel 70.

At least ball sets 40, the ball sets 40 are composed of a plurality of balls 401, the ball sets 40 are accommodated in the ball circulation passage 70, and the ball sets 40 move in the ball circulation passage 70.

It is characterized in that the end cap groups 30 are each concavely provided with at least oil storage grooves 33, as shown in fig. 5, the oil storage grooves 33 are used for accommodating lubricating oil 331, the oil storage grooves 33 are located on the side of the end cap groups 30 facing the outer cylinder 20, the end cap groups 30 are each concavely provided with at least guide grooves 34, and the guide grooves 34 are communicated with the oil storage grooves 33 and or a combination of the th circulation hole 31 and the second circulation hole 32 to guide the lubricating oil 331 to lubricate the ball group 40.

It should be noted that , in the embodiment, the ball spline set 100 does not have a ball retainer, but directly forms the ball channel 50 by the track groove 11 and the ball groove 21, but the present invention is not limited thereto, and a ball retainer may be provided.

Please refer to fig. 2, which is an exploded view of an embodiment of the present invention, the ball spline assembly 100 further includes two outer covers 80, the outer covers 80 are disposed on the spline shaft 10, the outer covers 80 are respectively disposed on another side of the end cover assembly 30 facing to the side of the outer cylinder 20, in the present embodiment, two through holes 82 are respectively formed through the outer cylinder 20, the end cover assembly 30 and the outer cover 80, the through holes 82 are symmetrically disposed, and the through holes 82 are used for two screws 81 to penetrate, so that the outer cylinder 20, the end cover assembly 30 and the outer cover 80 are tightly combined.

For further reference to understand the structural features, operational features, and intended advantages of the invention, reference will now be made to the use of the invention in a manner believed to provide a more thorough and detailed understanding of the invention as described below:

please refer to fig. 3a and 3b, which are a schematic cross-sectional view taken along line a-a of fig. 1 and a partially enlarged view of fig. 3a, step defines the symmetrical arrangement of the present invention, which means that separation line S passing through the center point of the spline shaft 10 is provided, and the left and right sides of the separation line S have the same number of the track grooves 11, as shown in fig. 3a, the left and right sides of the separation line S are respectively provided with two track grooves 11, and the track grooves 11 are pairwise and correspondingly disposed on the surface of the spline shaft 10, and it is worth to mention that the ball grooves 21 and the circulation channel 22 are also correspondingly disposed with respect to the separation line S.

As shown in FIG. 3B, the groove surfaces of the track groove 11 and the ball groove 21 are Goldd arcs, respectively, when the ball group 40 is accommodated in the ball passage 50 for circulation, the surface of the ball 401 does not completely adhere to the groove surfaces of the track groove 11 and the ball groove 21, but is in a point contact state (position shown as contact point B). in this embodiment, a connecting line L (virtual straight line) extends from the middle position of the groove surface of the track groove 11 to the center point of the spline shaft 10, and a straight line from the contact point B of the ball 401 to the center point of the ball 401 forms an included angle θ with the connecting line L₁The angle theta₁The angle of (2) is 40 degrees, but the present invention is not limited thereto. In other embodiments, the included angle θ₁Is 45 degrees, and is adjusted as required.

Please refer to fig. 4, which is a partial cross-sectional view of an embodiment of the present invention, two end cap sets 30 each have four of the return channels 60, which corresponds to the other component structures described above, but is not limited thereto, the return channels 60 are located at two ends of the ball channels 50 and the circulation channels 22, and the ball channels 50, the circulation channels 22 and the return channels 60 together form four ball circulation channels 70, in this embodiment, the number of the ball sets 40 is four, the ball sets 40 are respectively accommodated in the ball circulation channels 70, specifically, ball channels 50, circulation channels 22 and two return channels 60 together form ball circulation channels 70, and ball circulation channels 70 accommodate ball sets 40.

Please refer to fig. 5, which is a perspective view of an end cover assembly according to an embodiment of the present invention, wherein four oil storage grooves 33 are recessed in each of the end cover assemblies 30, the oil storage grooves 33 are located between the th circulation hole 31 and the second circulation hole 32, four guide grooves 34 are recessed in each of the end cover assemblies 30 to communicate the oil storage grooves 33 with the second circulation hole 32, and only the second circulation hole 32 is communicated in consideration of the consumption speed of the lubricant oil 331, but not limited thereto, in a preferred embodiment, eight guide grooves 34 are recessed in each of the end cover assemblies 30, and the guide grooves 34 are respectively communicated with the oil storage grooves 33, the th circulation hole 31 and the second circulation hole 32, so that the lubrication effect is better, but the lubricant oil 331 is consumed more quickly, and the service life of the ball spline assembly 100 is reduced.

Please refer to fig. 6, which is an exploded view of an end cap assembly according to an embodiment of the present invention, the end cap assembly 30 is composed of 0 th and 1

second caps

35 and 36, respectively, each of the 2 th and 382 th caps 35 is concavely provided with at least a 3 concave portion 351, each of the second caps 36 is convexly provided with at least a 4 convex portion 361 corresponding to the concave portion 351, an inner side surface of the concave portion 351 is th and th arc-shaped grooves 3511, each of the convex portions 361 is provided with second arc-shaped grooves 3611, the th and the second arc-shaped grooves 3611 jointly form the backflow channel 60, and specifically, of the th and of the second arc-shaped grooves 3511 and jointly form of the backflow channels 60.

Referring to fig. 7, which is a perspective view of a second embodiment of the present invention, compared to the th embodiment, the structural difference of the second embodiment of the present invention is that the end of the outer cylinder 20 has flange portions 23, and the flange portions 23 protrude from the inner side surface of the outer cylinder 20 toward the outer side surface of the outer cylinder 20, thereby increasing the application range of the ball spline set 100 of the present invention.

The features of the present invention and the expected effects achieved by the same are stated below:

the utility model discloses a ball spline group 100 with oil storage tank mainly is by the setting of this oil storage tank 33 and this guide way 34, and its lubricated this ball group 40 to reduce the produced frictional force of this ball group 40 when the motion, its life who improves this ball spline group 100.

Therefore, the utility model discloses have following implementation efficiency and technical efficiency:

it , the utility model discloses see through this oil storage tank 33 and store this lubricating oil 331, make this ball spline group 100 have the space of storing the oil, need not disassemble this lubricating oil 331 after this ball spline group 100, lead to personnel's misoperation to make this lubricating oil 331 splash or the problem of drippage.

Secondly, the utility model discloses see through this guide way 34 and guide this ball group 40 of this lubricating oil 331 lubrication, reduce this ball group 40 produced frictional force in the motion, make this ball spline group 100 have self-lubricate's efficiency in the motion, it can solve because of the many not also estimation of oil interpolation, lead to occasionally the fuel feeding too much to cause the oil excessive, or the fuel feeding is not enough the trouble that the lubrication efficiency is not good.

To sum up, the present invention has its excellent progress in the similar products, and the same structure is not found in the literature before looking over the technical data about the similar structure at home and abroad, so the present invention has the new patent element and the application is proposed according to the law.

However, the foregoing is only a preferred and enabling embodiment of the present invention, and features may be used in combination with each other in the alternative applications without explicit repulsion therebetween. Moreover, the equivalent structural changes of the present invention within the scope of the specification and claims should be considered as included in the scope of the present invention.

Claims

1, a ball spline set having an oil reservoir, comprising:

spline shaft, at least track groove is opened on the surface of the spline shaft along the axial direction of the spline shaft;

outer cylinder, which is slidingly sleeved on the spline shaft, the inner surface of the outer cylinder is provided with at least ball grooves along the axial direction of the outer cylinder, at least circulating channel is arranged between the outer surface and the inner surface of the outer cylinder along the axial direction of the outer cylinder, the ball grooves and the track grooves form ball channels;

two end cover sets, the end cover sets are sleeved on the spline shaft and respectively arranged at two ends of the outer cylinder, at least return channels are respectively arranged on the side faces of the end cover sets facing the outer cylinder in a penetrating manner, the two ends of each return channel are respectively st th circulation hole and second circulation hole, the th circulation hole is connected with the ball channel, the second circulation hole is connected with the circulation channel, the return channel, the circulation channel and the ball channel jointly form ball circulation channel, and

at least ball group, the ball group is composed of a plurality of balls, the ball group is accommodated in the ball circulation channel, and the ball group moves in the ball circulation channel;

2. The ball spline set with the oil reservoir of claim 1, wherein the oil reservoir is disposed between the th circulation hole and the second circulation hole, and the guide channel communicates with the second circulation hole.

3. The ball spline set of claim 1, wherein the track groove is a groove recessed from the surface of the spline shaft toward the center of the spline shaft, and the track groove is connected from the end of the spline shaft to the other end of the spline shaft.

4. The ball spline set with the oil reservoir as set forth in claim 1, wherein the ball groove is a groove recessed from the inside surface of the outer cylinder toward the outside surface of the outer cylinder, the ball groove communicating from the end of the outer cylinder to the other end of the outer cylinder.

5. The ball spline set with the oil storage tank as claimed in claim 1, further comprising two outer covers, wherein the outer covers are sleeved on the spline shaft, the outer covers are respectively disposed on the other side surfaces of the end cover set facing the side surface of the outer cylinder, two through holes are respectively formed through the outer cylinder, the end cover set and the outer covers, and two locking screws are inserted into the through holes to tightly combine the outer cylinder, the end cover set and the outer covers.

6. The ball spline set having an oil reservoir according to claim 1, wherein the number of the track grooves is four, and the track grooves are symmetrically provided on the surface of the spline shaft.

7. The ball spline set according to claim 6, wherein the number of the ball passages and the circulation passages is four, respectively, the number of the return passages is eight, and the ball passages, the circulation passages and the return passages collectively form four ball circulation passages.

8. The ball spline set with the oil storage tank as claimed in claim 1, wherein the end cap set comprises covers and covers, the covers each have a concave portion of at least , and the second covers each have a convex portion of at least matching with the concave portion.

9. The ball spline set with the oil reservoir of claim 8, wherein the depression is arc-shaped groove , the protrusions each have arc-shaped groove, and the arc-shaped groove and the second arc-shaped groove combine to form the return channel.

10. The ball spline set with the oil reservoir of claim 1, wherein the end of the outer cylinder has a flange portion that projects from the inside surface of the outer cylinder in the direction of the outside surface of the outer cylinder.