CN104728261B - Ball spline with lubrication structure - Google Patents

Abstract

A ball spline with a lubrication structure comprises a long shaft, a mobile body, a retainer and multiple rolling elements, wherein the long shaft extends towards a direction to form a long-striped structure and the extension direction is defined as the axis direction; the outer surface of the long shaft is provided with multiple rolling grooves which are arranged along the axis direction; the mobile body is provided with a through-hole for letting the long shaft pass through; the inner face of the through-hole is provided with rolling troughs which are corresponding to the rolling grooves; the rolling grooves and the rolling troughs form a load path; the outer face of the mobile body is provided with multiple oilholes which are communicated with the through-hole; the retainer is arranged between the long shaft and the mobile body and is provided with multiple retaining paths; one retaining path and the load path form a circulation path; an axial oil duct arranged along the axis direction and a horizontal oil duct which is connected with two retaining paths and the axial oil duct are arranged between the two retaining paths; the axial oil duct, the horizontal oil duct and the inner face of the through-hole form a lubricating oil duct which is communicated with the oilholes; and the multiple rolling elements are arranged in the circulation path. According to the invention, matching universality between the lubrication structure of the ball spline and equipment can be enhanced.

Description

The ball spline of tool lubrication system

Technical field

The present invention is a kind of Linear transmission component, espespecially a kind of ball spline of tool lubrication system.

Background technology

Lubrication is very important for Linear transmission component, can not only lift the operation smooth degree of rolling member, go back Temperature rise can be avoided to cause heat displacement, can more extend the service life of linear transmission component, therefore user is for Linear transmission group The lubrication system design of part is paid much attention to, therefore in order to coordinate the user in various fields, the dealer of Linear transmission component is just The high lubrication system of versatility must be designed；And the common lubrication system of ball spline is designed as shown in figure 9, its ball spline Moving body 2 be provided with oilhole 22, the oilhole 22 is connected with the horizontal oil circuit 31 of retainer 3, and lubricating oil is entered by oilhole 22 Afterwards, then by horizontal oil circuit 31 circulating path 32 of both sides is guided to lubricate rolling member 1.

But, above-mentioned lubrication system design works as user because the position of the horizontal oil circuit of the retainer is fixed When the oil transportation position of the equipment of design cannot coordinate the position of the oilhole and horizontal oil circuit, the retainer just must be by the horizontal oil Road position moves to the position that can coordinate with the oil transportation position of equipment, that is to say, that the retainer must re-mold manufacture, therefore such as This design not only needs to spend higher design and manufacturing cost and because the horizontal oil circuit specification of retainer is numerous therefore also improve thing Material management cost, therefore be greatly reduced ball spline manufacture profit, and also cannot provide more cheap ball spline product to User uses, therefore real necessity for having improvement to progress greatly.

The content of the invention

In view of the problems referred to above, present invention is primarily aimed at：Design the high lubrication system of a versatility and be applied to ball Spline, to meet the design of the lubricating oil input of various field users.

To reach above-mentioned purpose, the solution of the present invention is：

A kind of ball spline of tool lubrication system, comprising：One major axis, elongation towards a direction is strip structure, and definition should Prolonging direction is direction of principal axis, and the outer surface of the major axis is provided with multiple rolling channels for axially arranging；One moving body, is provided with a confession The perforation that the major axis wears, the inner edge surface of the perforation is provided with the rolling groove of the relative rolling channel, and the rolling channel is constituted with rolling groove One load path, the outer edge surface of the moving body is provided with multiple oilholes connected with the perforation；One retainer, be arranged at the major axis with Between moving body, the retainer is provided with multiple holding paths, and the holding path constitutes a circulating path with load path, and two should Keep being provided with an axial oil duct for axially arranging and a horizontal stroke being connected with the two holding paths and axial oil duct between path To oil duct, the axial oil duct and horizontal oil duct and the inner edge surface of the perforation constitute a lubricating oil runner, the lubricating oil runner with should Oilhole is connected；Multiple rolling members are located at the circulating path.

Preferably, the axial oil duct optimum length is the 40%～97% of the total length of retainer.

Preferably, the optimal angle of circumference of the axial oil duct is between 2 °～30 °.

By the axial oil duct and the collocation of horizontal oil duct, the oil-hole location set by the moving body is allowed arbitrarily to be changed, Such as oilhole may be disposed at the centre of moving body or the position near both ends（Note：The oilhole of moving body by tool sharpening into Type thus can manufacture according to user's request, but retainer is by mold tool plastic ejection formation therefore and cannot arbitrarily change its oil circuit knot Structure）, with the design of the lubricating oil input of the equipment of the user that arranges in pairs or groups, to avoid the retainer from re-molding the problem of manufacture, To improve the lubrication system of ball spline and the versatility of equipment collocation.

Description of the drawings

Fig. 1 is the system diagram of the ball spline of present invention tool lubrication system；

Fig. 2 is the constitutional diagram of the ball spline of present invention tool lubrication system；

Fig. 3 is the direction of principal axis sectional view of the ball spline of present invention tool lubrication system（One）；

Fig. 4 is the direction of principal axis sectional view of the ball spline of present invention tool lubrication system（Two）；

Fig. 5 is the sectional view of A-A in Fig. 4；

Fig. 5 A are the partial enlarged drawing in Fig. 5 at B；

Fig. 6 is the sectional view of B-B in Fig. 4；

Fig. 6 A are the partial enlarged drawing in Fig. 6 at C；

Fig. 7 is the sectional view of C-C in Fig. 4；

Fig. 7 A are the partial enlarged drawing in Fig. 7 at D；

Fig. 8 is the constitutional diagram of the ball spline of present invention tool lubrication system；

Fig. 9 is the constitutional diagram of the ball spline that known techniques have lubrication system.

【Symbol description】

The present invention：

The rolling channel of 1 major axis 11

2 moving bodys 21 are bored a hole

The groove of 211 rolling groove 212

The oilhole of 213 inner edge surface 22

The first component of 23 endless-oil groove 3

The 31 first horizontal oil ducts of axial oil duct 32

A axial directions oil duct 33 first keeps path

4 second component 41 second keeps path

42 second axial oil ducts 90 keep path

The rolling member of 100 lubricating oil runner 5

6 fixture X direction of principal axis

L, H length Q angle of circumference

Prior art：

The moving body of 1 rolling member 2

The retainer of 22 oilhole 3

The circulating path of 31 horizontal oil duct 32.

Specific embodiment

In order to technical scheme is explained further, the present invention is explained in detail below by specific embodiment State.

Refer to shown in Fig. 1 to Fig. 8, be the schema of a preferred embodiment of the present invention, the present invention is a kind of tool lubrication system Ball spline, comprising：One major axis 1, elongation towards a direction is strip structure, defines the prolonging direction for direction of principal axis X, the length The outer surface of axle 1 is provided with multiple rolling channels 11 for axially arranging；One moving body 2, is provided with a perforation worn for the major axis 1 21, the inner edge surface 213 of the perforation 21 is provided with the rolling groove 211 of the relative rolling channel 11, and the rolling channel 11 is constituted with rolling groove 211 One load path, the outer edge surface of the moving body 2 is provided with multiple oilholes 22 connected with the perforation 21；One retainer, is arranged at this Between major axis 1 and moving body 2, the retainer is provided with multiple holding paths 90, and the holding path 90 constitutes one with load path Circulating path, is provided with the axial oil duct A and one and two holding paths that axially X is arranged between the two holding paths 90 The 90 and axial oil duct A horizontal oil ducts 32 for connecting, the axial oil duct A and horizontal oil duct 32 and the structure of inner edge surface 213 of the perforation 21 Into a lubricating oil runner 100, the lubricating oil runner 100 is connected with the oilhole 22；In the present embodiment, the retainer is by first component 3 are constituted with second component 4, and the length of the first component 3 is more than the length of the second component 4, and the first component 3 is provided with multiple First keeps path 33 and the first axial oil duct 31 between the two first holding paths 33, and the horizontal oil duct 32 is located at should First component 3, the second component 4 is provided with multiple second and keeps path 41 and between the two second holding paths 41 second Axial oil duct 42, the first holding path 33 is U-shaped, and the second holding path 41 is semicircular arc, and the first holding path 33 and second keep path 41 to constitute the holding path 90, and the first axial axial direction of oil duct 31 and second oil duct 42 constitutes the axial direction Oil duct A, and the retainer is assembled in after the perforation 21, is embedded at the moving body 2 by fixture 6 in the retainer two ends and is arranged Groove 212 in, the retainer is fixed on into the perforation 21；Multiple rolling members 5 are located at the circulating path.

Refer to again shown in Fig. 4, Fig. 5, in order to improve the versatility of the lubrication system, the axial oil duct A optimum length L are The 40%～97% of the total length H of retainer, so design can meet machinery, semiconductor, automation, robot and wood-working machine etc. The demand of industry, to improve the versatility of ball spline and manufacturing cost is greatly reduced；In addition, because increased the axial oil duct The setting of A, in order to not draw the integral rigidity for ringing the retainer, the dimensional structure that the present invention optimizes via analysis software, and The size definitions that implementation test obtains optimal axial oil duct A are carried out, because the axial oil duct A most probables draw is rung the retainer Structure be and the thick setting of meat between the holding path, therefore the present invention by the width of the axial oil duct A in angle of circumference mode Define, as shown in figure 5, be applied to the retainer of different size, the both sides end points of the axial oil duct and the center of circle institute structure of retainer Into angle of circumference Q most preferably range from 2 °～30 °, as example, the external diameter of the retainer is 28mm to the specification with the present embodiment, and is somebody's turn to do The angle of circumference of axial oil duct is 5.2 °, so can obtain preferably retainer rigidity.

Separately refer to shown in Fig. 8, be provided with endless-oil groove 23 in the outer edge surface of the moving body 2 and be connected with multiple oilholes 22, such as This is just not required to process the endless-oil groove on user's equipment, for example：Fig. 2 is not provided with the endless-oil groove 23 in the outer edge surface of moving body 2, Just endless-oil groove must be processed in user's equipment（Do not show）, so could be input into the ring by a lubricating oil input of equipment Each oilhole is delivered to after oil groove, to simplify entirety lubrication system.

The product form and style of above-described embodiment and schema and the non-limiting present invention, any art it is common Appropriate change or modification that technical staff is done to it, all should be regarded as the patent category without departing from the present invention.

Claims (3)

1. it is a kind of tool lubrication system ball spline, it is characterised in that include：

One major axis, elongation towards a direction is strip structure, and it is direction of principal axis to define the prolonging direction, and the outer surface of major axis is provided with many The individual rolling channel for axially arranging；

One moving body, is provided with a perforation worn for major axis, and the inner edge surface of perforation is provided with the rolling groove of relative rolling channel, rolling channel A load path is constituted with rolling groove, the outer edge surface of moving body is provided with multiple oilholes connected with perforation；

One retainer, is arranged between major axis and moving body, and retainer is provided with multiple holding paths, and one keeps path and load road Footpath constitutes a circulating path, and an axial oil duct for axially arranging and one and two holding paths are provided between two holding paths And the horizontal oil duct of axial oil duct connection, axial oil duct and horizontal oil duct and the inner edge surface one lubricating oil runner of composition bored a hole, profit Lubricating oil runner is connected with oilhole；

Multiple rolling members are located at circulating path.

2. the ball spline of lubrication system is had as claimed in claim 1, it is characterised in that：Axial oil duct optimum length is holding The 40%～97% of the total length of device.

3. the ball spline of lubrication system is had as claimed in claim 1, it is characterised in that：The angle of circumference of axial oil duct is between 2 ° ～30 °.