CN218118516U - Ball spline device - Google Patents
Ball spline device Download PDFInfo
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- CN218118516U CN218118516U CN202222569782.3U CN202222569782U CN218118516U CN 218118516 U CN218118516 U CN 218118516U CN 202222569782 U CN202222569782 U CN 202222569782U CN 218118516 U CN218118516 U CN 218118516U
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- nut
- synchronizing wheel
- ball spline
- spline shaft
- hole
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Abstract
The utility model discloses a ball spline device, which comprises a spline shaft, a nut and a synchronizing wheel, wherein the nut is sleeved on the spline shaft and comprises a first end and a second end which are oppositely arranged along the extending direction of the spline shaft; the synchronizing wheel is sleeved on the spline shaft, a counter bore for accommodating the first end is formed in one side, facing the first end, of the synchronizing wheel, and the nut is connected with the synchronizing wheel so that the synchronizing wheel can drive the nut to rotate. Compared with the existing ball spline structure, on one hand, under the condition that the sizes of the synchronizing wheel and the nut are the same, when the stroke is controlled within the same range, the axial length size of the spline shaft can be reduced, so that the integral volume and mass of the ball spline device are reduced under the condition that the stroke range of the nut is not influenced; on the other hand, the distance from the gravity center of the synchronizing wheel to the gravity center of the nut is reduced, so that under the condition that the acting force is not changed, the bending moment applied to the nut is reduced, and the service life of the nut is prolonged.
Description
Technical Field
The utility model relates to a ball spline shaft technical field especially relates to a ball spline device.
Background
Along with the continuous improvement of degree of automation among the industrial production process, more and more transmission equipment and mechanism require more and more high to drive mechanism's space, weight, in order to practice thrift the space, realize structure lightweight and integrated design, the ball spline has realized turning into the structure of output rectilinear movement with the rotary motion of motor as a novel transmission mode's appearance. Compared with the traditional transmission mode, the transmission mechanism has the advantages of high transmission efficiency, low response delay, high precision, low pollution and the like. The ball spline well realizes the integration of the mechanism on the basis of continuing the advantages of the ball screw.
However, with the improvement of the requirements of the transmission system on high speed, high load, low noise and the like, the installation mode of integrating the ball spline and the belt wheel in the traditional structure has the defects of large occupied space and heavy weight, and is contradictory to the pursuit of light weight of the structural design.
In view of the above, there is a need for a new ball spline device that solves or at least alleviates the above technical drawbacks.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a ball spline device aims at solving current ball spline and big and the big technical problem of quality of band pulley occupation space.
In order to achieve the above object, the present invention provides a ball spline device, including:
a spline shaft;
the nut is sleeved on the spline shaft and comprises a first end and a second end which are oppositely arranged along the extending direction of the spline shaft;
the synchronizing wheel is sleeved on the spline shaft, the synchronizing wheel faces one side of the first end and is provided with a counter bore containing the first end, and the nut is connected with the synchronizing wheel so that the synchronizing wheel can drive the nut to rotate.
In one embodiment, a first threaded hole is formed in the side wall of the synchronizing wheel, and the synchronizing wheel penetrates through the first threaded hole through a threaded fastener to be in threaded connection with the outer side wall of the nut.
In one embodiment, the number of the first threaded holes is at least two, and at least two first threaded holes are arranged at intervals along the circumferential direction of the synchronizing wheel.
In one embodiment, the number of the first threaded holes is two, and the two first threaded holes are arranged at intervals of 90 ° in the circumferential direction of the synchronizing wheel.
In one embodiment, the first threaded hole extends in a direction that coincides with a radial direction of the synchronizing wheel.
In an embodiment, the counter bore includes a circular receiving groove and a through hole communicated with the circular receiving groove, the inner diameter of the circular receiving groove is larger than the inner diameter of the through hole, the first end is located in the circular receiving groove, one side of the first end facing the through hole is abutted to the bottom edge of the circular receiving groove, and the first end is used for limiting the movement of the first end relative to the circular receiving groove in the direction of the through hole.
In one embodiment, the outer sidewall of the first end abuts against the sidewall of the circular receiving groove.
In an embodiment, the ball spline device further includes an end cover, the end cover is provided with an avoiding hole for the spline shaft to pass through, the end cover is disposed in the through hole, and the end cover is connected to the first end through a screw.
In one embodiment, the outer wall of the spline shaft is in clearance fit with the inner wall of the counterbore.
In one embodiment, the synchronizing wheel, the nut and the spline shaft are concentrically arranged.
In the above technical solution of the present invention, because the synchronizing wheel has been opened towards one side of the first end with the counter bore that holds the first end, so that part of the nuts can be inserted into the counter bore, and through such a setting, the outer wall of the nut of the ball spline shaft is directly abutted to the outer wall of the synchronizing wheel compared to the conventional structure, and is connected by the screw, on the one hand, because part of the nuts are inserted into the counter bore of the synchronizing wheel, so under the condition that the sizes of the synchronizing wheel and the nut are the same, the size of the technical solution provided by the present invention after the nut and the synchronizing wheel are assembled is shorter than the conventional structure, which also leads to the condition that the length of the spline shaft is the same, the utility model provides a nut of the technical solution that the stroke is larger than the stroke of the nut of the conventional structure, and if the stroke is set to be the same, the technical solution provided by the present invention can reduce the axial length size of the spline shaft, thereby reducing the overall volume and quality of the ball spline device under the condition that the stroke range of the nut is not influenced; on the other hand, the synchronizing wheel of traditional structure can produce a skew nut centrobaric moment of bending to the nut owing to the tensile meeting that can receive the hold-in range, this moment of bending can aggravate the wearing and tearing of nut in the nut motion process, thereby reduce the life of nut, and through seting up the counter bore on the synchronizing wheel, make partial nut can stretch into in the counter bore, thereby the focus that has reduced the synchronizing wheel is apart from the centrobaric distance of nut, the arm of force has been reduced promptly, thereby under the unchangeable circumstances of power of effect, the moment of bending size that the nut received has been reduced, and then the life of nut has been increased.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the prior art descriptions will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is also possible for those skilled in the art to obtain other drawings in the structures shown in the drawings without creative efforts.
Fig. 1 is a schematic view of a part of a ball spline device according to an embodiment of the present invention;
fig. 2 is a schematic view of a part of a ball spline device according to an embodiment of the present invention;
fig. 3 is a partial structural view of a conventional ball spline shaft nut.
The reference numbers illustrate:
| 1 | |
11 | |
| 12 | Nut with a |
13 | |
| 14 | |
15 | Synchronizing |
| 16 | Counter bore | 161 | |
| 162 | Through |
17 | |
| 18 | Threaded |
19 | |
| 20 | |
21 | |
| 22 | |
23 | Avoiding hole |
The purpose of the present invention, its functional features and advantages will be further described with reference to the accompanying drawings.
Detailed Description
The technical solutions of the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
It should be noted that all the directional indicators (such as upper and lower … …) in the embodiments of the present invention are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in fig. 1), and if the specific posture is changed, the directional indicator is changed accordingly.
In addition, descriptions in the present application as to "first", "second", and the like are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicit to the number of technical features indicated. Thus, a feature defined as "first" or "second" can include at least one of that feature either explicitly or implicitly.
Moreover, the technical solutions between the embodiments of the present invention can be combined with each other, but it is necessary to be able to be realized by a person having ordinary skill in the art as a basis, and when the technical solutions are combined and contradicted with each other or cannot be realized, it should be considered that the combination of the technical solutions does not exist, and the present invention is not within the protection scope of the present invention.
The utility model provides a ball spline device 1, as shown in fig. 1 and fig. 2, this ball spline device 1 includes the integral key shaft 11, nut 12 and synchronizing wheel 15, and nut 12 is located on integral key shaft 11, and nut 12 includes relative first end 13 and the second end 14 that sets up along the extending direction of integral key shaft 11; the synchronizing wheel 15 is sleeved on the spline shaft 11, a counter bore 16 for accommodating the first end 13 is formed in one side, facing the first end 13, of the synchronizing wheel 15, and the nut 12 is connected with the synchronizing wheel 15, so that the synchronizing wheel 15 can drive the nut 12 to rotate.
Because the synchronizing wheel 15 is provided with the counter bore 16 for accommodating the first end 13 on the side facing the first end 13, part of the nuts 12 can extend into the counter bore 16, and through such arrangement, compared with a conventional structure in which the outer wall of the nuts of the ball spline shaft is directly abutted against the outer wall of the synchronizing wheel, and the nut is connected by screws, on one hand, because part of the nuts 12 extend into the counter bore 16 of the synchronizing wheel 15, when the synchronizing wheel 15 and the nuts 12 are the same in size as compared with the synchronizing wheel and the nuts in the prior art, the size after the nuts 12 and the synchronizing wheel 15 are assembled is shorter than the size after the synchronizing wheel and the nuts are assembled in the conventional structure, which results in that, when the lengths of the spline shafts 11 are the same, the stroke of the nuts 12 is larger than that of the nuts in the conventional structure, and if the stroke is set to be the same, the axial length of the spline shafts 11 can be reduced, so that the overall volume and mass of the ball spline shaft 1 are reduced without affecting the stroke range of the nuts 12, thereby satisfying the design and the concept of light weight and reducing the production cost of the spline shafts 11; on the other hand, the synchronizing wheel of traditional structure can produce the moment of gravity of a skew nut to the nut owing to can receive the tensile of hold-in range, this moment of gravity can aggravate the wearing and tearing of nut in the nut motion process, thereby reduce the life of nut, and through seting up counter bore 16 on synchronizing wheel 15, make partial nut 12 can stretch into in the counter bore 16, thereby the distance of the focus of synchronizing wheel 15 apart from nut 12 focus has been reduced, as shown in fig. 1, the size that first end 13 stretches into counter bore 16 is L, the length of the arm of force has been reduced promptly, the length that reduces is L, thereby under the unchangeable condition of power of effect, the moment of gravity size that nut 12 received has been reduced, and then the life of nut 12 has been increased.
And, the synchronizing wheel 15 is detachably coupled with the nut 12. In the concrete implementation process, the synchronizing wheel 15 is often required to be adaptively adjusted according to the requirement of the transmission ratio, and the synchronizing wheel 15 is detachably connected with the nut 12, wherein the synchronizing wheel 15 can be connected with the nut 12 through a screw or a positioning pin, so that when the synchronizing wheel 15 is required to be replaced according to the transmission ratio, the synchronizing wheel 15 can be replaced independently without replacing the nut 12 together.
Further, a first threaded hole 17 is formed in the side wall of the synchronizing wheel 15, and the synchronizing wheel 15 penetrates through the first threaded hole 17 through a threaded fastener 18 to be in threaded connection with the outer side wall of the nut 12. Through seting up first screw hole 17 on the lateral wall of synchronizing wheel 15 to carry out radial positioning and axial positioning to nut 12 through threaded fastener 18, compare in traditional with first screw hole setting on the terminal surface of synchronizing wheel and nut, as shown in fig. 3, carry out axial locking to synchronizing wheel and nut in the traditional structure, because the utility model discloses a synchronizing wheel 15 and nut 12 carry out radial locking through threaded fastener 18, as shown in fig. 1, consequently first screw hole 17 need not be considered to set up by the terminal surface of nut 12, consequently can be with the wall thickness attenuate of nut 12, thereby reduced the radial dimension of nut 12, and then reduced the volume and the quality of nut 12. It should be noted that, the nut 12 may be provided with a mounting hole communicated with the first threaded hole 17, and the threaded fastener 18 is respectively in threaded connection with the first threaded hole 17 and the inner wall of the mounting hole; the nut 12 can also be provided with a mounting groove corresponding to the first threaded hole 17, and the end part of the threaded fastener 18 penetrating out of the first threaded hole 17 extends into the mounting groove to limit the axial movement and radial runout of the nut 12 relative to the synchronizing wheel 15; furthermore, the end of the threaded fastening element 18 that protrudes through the first threaded hole 17 can directly abut against the outer wall of the nut 12, limiting the axial movement of the nut 12 relative to the synchronizing wheel 15 by friction.
Further, the number of the first threaded holes 17 is at least two, and at least two first threaded holes 17 are provided at intervals in the circumferential direction of the synchronizing wheel 15. By forming at least two first threaded holes 17 along the circumferential direction of the synchronizing wheel 15 and arranging each first threaded hole 17 with a threaded fastener 18 corresponding to the first threaded hole, the connection strength and the connection reliability of the nut 12 and the synchronizing wheel 15 are improved.
The number of the first threaded holes 17 is two, and the two first threaded holes 17 are arranged at intervals of 90 degrees along the circumferential direction of the synchronizing wheel 15. The angle between the center lines of the two first threaded holes 17 is 90 °, so that the radial forces generated by the two threaded fasteners 18 on the nut 12 are vertically arranged and do not affect each other.
As shown in fig. 1, the first threaded hole 17 extends in the same direction as the radial direction of the synchronizing wheel 15. The first threaded hole 17 extends in the direction of the radial extension of the synchronizing wheel 15, and the nut 12 is generally disposed concentrically with the synchronizing wheel 15, so that the force applied by the threaded fastener 18 to the nut 12 extends in the direction of the radial extension of the nut 12 and passes through the center of gravity of the nut 12, so that the force applied by the threaded fastener 18 to the nut 12 does not generate additional torque on the nut 12, which affects the service life of the nut 12.
In addition, the counterbore 16 comprises a circular receiving groove 161 and a through hole 162 communicated with the circular receiving groove 161, the inner diameter of the circular receiving groove 161 is larger than that of the through hole 162, the first end 13 is located in the circular receiving groove 161, and one side of the first end 13 facing the through hole 162 is abutted with the bottom edge of the circular receiving groove 161 to limit the first end 13 from moving relative to the circular receiving groove 161 towards the direction of the through hole 162. The inner diameter of the circular receiving groove 161 is larger than the inner diameter of the through hole 162, and the groove wall of the circular receiving groove 161 facing the first end 13 abuts against the first end 13, thereby axially limiting the first end 13.
Further, the outer side wall of the first end 13 abuts against the side wall of the circular receiving groove 161. The outer wall of the first end 13 abuts against the inner wall of the circular accommodation groove 161, thereby enhancing the stability of the rotation of the synchronizing wheel 15.
In addition, the ball spline device 1 further includes an end cover 21, the end cover 21 is provided with an avoiding hole 23 for the spline shaft 11 to pass through, the end cover 21 is disposed in the through hole 162, and the end cover 21 is connected to the first end 13 through a screw. Wherein, second screw hole 22 has been seted up to the terminal surface of first end 13, and second screw hole 22 extends along the axial direction of nut 12, and the quantity of second screw hole 22 is a plurality of, and a plurality of second screw holes 22 set up along the even interval of circumference of first end 13. A screw is screwed through the end cap 21 and into the second threaded hole 22 to screw the end cap 21 into the first end 13, thereby facilitating the installation and removal of the end cap 21.
In addition, the outer wall of spline shaft 11 is clearance fit with the inner wall of counterbore 16. The clearance exists between the outer wall of spline shaft 11 and the inner wall of counterbore 16, so that spline shaft 11 can move relative to synchronizing wheel 15 along the axial direction of spline shaft 11, and spline shaft 11 cannot be damaged due to friction with the inner wall of synchronizing wheel 15.
The synchronizing wheel 15, the nut 12, and the spline shaft 11 are concentrically disposed. The synchronizing wheel 15, the nut 12 and the spline shaft 11 are concentrically arranged, so that the stability of the synchronizing wheel 15, the nut 12 and the spline shaft 11 during movement is improved.
According to the utility model discloses an embodiment still installs steel ball chain 19 and circulator 20 in the nut 12, and wherein nut 12 and circulator 20 all adopt prior art, consequently on the basis that does not change nut 12 and circulator 20, adopt the utility model provides a synchronizing wheel 15 under the unanimous prerequisite of the stroke scope of nut 12, can effectively reduce integral key shaft 11's length.
The above is only the preferred embodiment of the present invention, not limiting the scope of the present invention, all of which are under the concept of the present invention, the equivalent structure transformation of the content of the specification and the attached drawings is utilized, or the direct/indirect application is included in other related technical fields in the protection scope of the present invention.
Claims (10)
1. A ball spline device, comprising:
a spline shaft;
the nut is sleeved on the spline shaft and comprises a first end and a second end which are oppositely arranged along the extending direction of the spline shaft;
the synchronizing wheel is sleeved on the spline shaft, the synchronizing wheel faces one side of the first end and is provided with a counter bore containing the first end, and the nut is connected with the synchronizing wheel so that the synchronizing wheel can drive the nut to rotate.
2. The ball spline device of claim 1, wherein the synchronizing wheel has a first threaded hole formed in a side wall thereof, and the synchronizing wheel is threaded to the outer side wall of the nut by a threaded fastener passing through the first threaded hole.
3. The ball spline apparatus of claim 2, wherein the number of first threaded holes is at least two, at least two of the first threaded holes being spaced apart in a circumferential direction of the synchronizing wheel.
4. The ball spline device of claim 3, wherein the number of the first threaded holes is two, and the two first threaded holes are arranged at 90 ° intervals in the circumferential direction of the synchronizing wheel.
5. The ball spline device of claim 2, wherein the first threaded bore extends in a direction that is coincident with a radial direction of the synchronizing wheel.
6. The ball spline device according to any one of claims 1 to 5, wherein the counter bore includes a circular receiving groove and a through hole communicating with the circular receiving groove, the inner diameter of the circular receiving groove is larger than the inner diameter of the through hole, the first end is located in the circular receiving groove, and one side of the first end facing the through hole abuts against a bottom edge of the circular receiving groove to limit the first end from moving relative to the circular receiving groove in a direction toward the through hole.
7. The ball spline device of claim 6, wherein an outer sidewall of the first end abuts a sidewall of the circular receiving groove.
8. The ball spline device of claim 6, further comprising an end cap, wherein the end cap defines an avoiding hole for the spline shaft to pass through, the end cap is disposed in the through hole, and the end cap is connected to the first end via a screw.
9. The ball spline assembly of any one of claims 1-5, wherein the outer wall of the spline shaft is a clearance fit with the inner wall of the counterbore.
10. The ball spline apparatus of any one of claims 1-5, wherein the synchronizing wheel, the nut, and the spline shaft are concentrically arranged.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222569782.3U CN218118516U (en) | 2022-09-27 | 2022-09-27 | Ball spline device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222569782.3U CN218118516U (en) | 2022-09-27 | 2022-09-27 | Ball spline device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218118516U true CN218118516U (en) | 2022-12-23 |
Family
ID=84496624
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222569782.3U Active CN218118516U (en) | 2022-09-27 | 2022-09-27 | Ball spline device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218118516U (en) |
-
2022
- 2022-09-27 CN CN202222569782.3U patent/CN218118516U/en active Active
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