阅读说明：本技术 一种用于传递扭矩的转向轴及球架结构 (Steering shaft and ball frame structure for transmitting torque ) 是由 童哲 张浩洋 郭冬冬 宋振林 郭振洲 于 2021-08-06 设计创作，主要内容包括：本发明公开了一种用于传递扭矩的转向轴及球架结构,包括设置于花键管内的花键轴,花键轴的外侧壁上设有外花键和弧形滚道一,花键管的内壁设有与其相适配的内花键和弧形滚道二,弧形滚道一和弧形滚道二之间均设有钢球,所述花键轴外侧壁上在位于外花键的位置处开设有环槽,所述花键轴和花键轴之间在位于对应环槽的位置处设有钢球保持架,所述钢球保持架包括弧形架体,所述花键轴上在位于弧形滚道一的位置处均嵌套有弧形架体,所述弧形架体上均开设有容纳槽,本发明具有可最大限度的保证在复杂表面结构,仍可方便装配及保证强度,钢球润滑的更加充分,传递扭矩更加稳定,使用寿命长,可以有效防止保持架脱出的风险等优点。(The invention discloses a steering shaft and ball frame structure for transmitting torque, which comprises a spline shaft arranged in a spline pipe, wherein the outer side wall of the spline shaft is provided with an external spline and an arc-shaped raceway I, the inner wall of the spline pipe is provided with an internal spline and an arc-shaped raceway II matched with the internal spline, steel balls are arranged between the arc-shaped raceway I and the arc-shaped raceway II, the outer side wall of the spline shaft is provided with an annular groove at the position of the external spline, a steel ball retainer is arranged between the spline shaft and the spline shaft at the position corresponding to the annular groove, the steel ball retainer comprises an arc-shaped frame body, the spline shaft is nested at the position of the arc-shaped raceway I and is provided with an arc-shaped frame body, and the arc-shaped frame body is provided with an accommodating groove. Long service life, and can effectively prevent the risk of the retainer from dropping off.)

1. The utility model provides a steering spindle and ball frame structure for transmitting moment of torsion, is including setting up the integral key shaft in the spline pipe, and the integral key shaft is equidistant being equipped with external splines and arc raceway one on being located the lateral wall towards spline pipe one end, and the inner wall of spline pipe is located the position department that corresponds external splines and arc raceway two and is offered internal splines and arc raceway two rather than the looks adaptation respectively, all is equipped with between arc raceway one and the arc raceway two and is no less than three steel ball, its characterized in that: the external splines all are clearance fit with the internal spline, the annular has been seted up in the position department that lies in the external spline on the integral key shaft lateral wall, be equipped with the steel ball holder in the position department that lies in corresponding the annular groove between integral key shaft and the integral key shaft, the steel ball holder includes the arc support body, the integral key shaft is gone up in the position department that lies in arc raceway one and is all nested there is the arc support body, all set up on the arc support body with the arc raceway one go up the holding tank of every row of steel ball quantity looks adaptation, the structure of holding tank and the structure looks adaptation of steel ball, and the edge part of holding tank all is equipped with the arch.

2. A steering shaft and ball rack arrangement for transmitting torque as claimed in claim 1 wherein: the length of the ring groove is not less than that of the arc frame body.

3. A steering shaft and ball rack arrangement for transmitting torque as claimed in claim 1 wherein: the steel ball retainer further comprises a connecting plate, the side walls of every two adjacent arc-shaped frame bodies are connected through the connecting plate to form a closed annular structure, the connecting plate and the arc-shaped frame bodies are of an integral structure, and at least one connecting plate is provided with an open slot.

4. A steering shaft and ball rack arrangement for transmitting torque as claimed in claim 3 wherein: the length of the connecting plate is smaller than that of the ring groove.

5. The steering shaft and ball rack structure for transmitting torque as claimed in claim 4, wherein: the open slot is Z-shaped structure, and the open slot runs through the lateral wall of connecting plate.

6. The steering shaft and ball rack structure for transmitting torque as claimed in claim 4, wherein: the open slot is the straight flute structure, and the open slot does not run through the connecting plate, the relative phase is crisscross each other and establishes the open slot about the lateral wall of connecting plate when the quantity of open slot is a plurality of.

7. A steering shaft and ball rack arrangement for transmitting torque as claimed in claim 1 wherein: the steel ball is a ball of a sphere structure or a roller of a cylinder structure.

Technical Field

The invention relates to the technical field of transmission shafts, in particular to a steering shaft and a ball rack structure for transmitting torque.

Background

The utility model provides a steering shaft's function is for the steering wheel with the steering torque transmission that the driver acted on the steering wheel to the steering gear, the junction of current steering shaft and steering gear adopts steel ball slip pair structure usually, the slip pair structure comprises integral key shaft, spline pipe and steel ball, for the assembly of producing the line, the steel ball generally uses the holder to carry out preassembleing and constitutes steel ball retainer assembly, adopt to mould plastics or cold extrusion moulding to assemble the holder to the integral key shaft usually, but it is inconvenient that there is steel ball retainer assembly, the assembly efficiency is low, the steel ball is lubricated inadequately, the steel ball wearing and tearing are great, the transmission moment of torsion is unstable, short service life, there is the risk scheduling problem that deviates from in the steel ball retainer.

Disclosure of Invention

The technical problem to be solved by the invention is to overcome the existing defects, and provide a steering shaft and a ball rack structure for transmitting torque, which can ensure a complex surface structure to the maximum extent, can still facilitate assembly and ensure strength, has high assembly efficiency, more sufficient steel ball lubrication, reduces the abrasion of a steel ball, has more stable transmission torque and long service life, can effectively prevent the risk of separation of a retainer, and can effectively solve the problems in the background technology.

In order to achieve the purpose, the invention provides the following technical scheme: a steering shaft and ball frame structure for transmitting torque comprises a spline shaft arranged in a spline pipe, wherein the spline shaft is provided with an external spline and an arc-shaped roller path I at equal intervals on the outer side wall facing one end of the spline pipe, the inner wall of the spline pipe is respectively provided with an internal spline and an arc-shaped roller path II matched with the external spline and the arc-shaped roller path II at positions corresponding to the external spline and the arc-shaped roller path II, at least three steel balls are arranged between the arc-shaped roller path I and the arc-shaped roller path II, the external spline and the internal spline are in clearance fit, the outer side wall of the spline shaft is provided with an annular groove at the position corresponding to the external spline, a steel ball retainer is arranged between the spline shaft and the spline shaft at the position corresponding to the annular groove and comprises an arc-shaped frame body, the spline shaft is nested with an arc-shaped frame body at the position corresponding to the arc-shaped roller path I, and the arc-shaped frame body is provided with accommodating grooves matched with the number of each row of steel balls on the arc-shaped roller path I, the structure of holding tank and the structure looks adaptation of steel ball, and the edge part of holding tank all is equipped with the arch.

Furthermore, the length of the ring groove is not less than that of the arc frame body.

Furthermore, the steel ball retainer further comprises a connecting plate, the side walls of every two adjacent arc-shaped frame bodies are connected through the connecting plate to form a closed annular structure, the connecting plate and the arc-shaped frame bodies are of an integral structure, and at least one connecting plate is provided with an open slot.

Further, the length of the connecting plate is smaller than that of the ring groove.

Furthermore, the open slot is of a Z-shaped structure and penetrates through the side wall of the connecting plate.

Furthermore, the open slot is the straight flute structure, and the open slot does not run through the connecting plate, the lateral wall left and right sides end of connecting plate mutually staggers when the quantity of open slot is a plurality of and establishes the open slot.

Further, the steel ball can be a roller with a column structure.

Compared with the prior art, the invention has the beneficial effects that: this a steering spindle and ball frame structure for transmission moment of torsion, multiple structure through the steel ball holder, but furthest's assurance is at complicated surface structure, still can conveniently assemble and guarantee intensity, assembly efficiency is high, through annular and open slot, it is more abundant that the steel ball is lubricated, reduce the wearing and tearing of steel ball, the transmission moment of torsion is more stable, long service life, can also carry out axial restriction to the steel ball holder through the open slot, prevent that the steel ball holder from deviating from, when special circumstances takes place to cause the steel ball to deviate from or wear out failure, the spline tooth of external spline and internal spline still can effectual transmission moment of torsion, guarantee function does not lose, can produce corresponding noise simultaneously, play the early warning effect, so that in time the discovery problem.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of the spline shaft structure of the present invention;

FIG. 3 is a side cross-sectional view of the spline shaft of the present invention;

FIG. 4 is a schematic view of a spline tube configuration of the present invention;

FIG. 5 is a side cross-sectional view of a spline tube of the present invention;

FIG. 6 is a schematic view of the spline tube and spline shaft mating of the present invention;

FIG. 7 is a schematic structural view of a single row of steel ball retainers of the present invention;

FIG. 8 is a schematic structural view of a multi-row steel ball retainer of the present invention;

FIG. 9 is an assembly view of the multi-row steel ball retainer of the present invention;

FIG. 10 is a side cross-sectional view of the multi-row steel ball retainer of the present invention after assembly;

FIG. 11 is a schematic structural view of a multi-row steel ball retainer according to the present invention;

fig. 12 is a schematic view of the roller assembly of the present invention.

In the figure: spline shaft 1, external spline 101, arc raceway I102, annular groove 103, spline tube 2, internal spline 201, arc raceway II 202, steel ball retainer 3, arc frame body 301, accommodating groove 302, connecting plate 303, opening groove 304 and steel ball 4.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example one

Referring to fig. 1-7 and fig. 12, the present invention provides a technical solution: a steering shaft and ball frame structure for transmitting torque comprises a spline shaft 1 arranged in a spline pipe 2, wherein the spline shaft 1 is provided with an external spline 101 and an arc-shaped raceway I102 at equal intervals on the outer side wall facing one end of the spline pipe 2, the inner wall of the spline pipe 2 is respectively provided with an internal spline 201 and an arc-shaped raceway II 202 which are matched with the internal spline 201 at the positions corresponding to the external spline 101 and the arc-shaped raceway II 102, at least three steel balls 4 are arranged between the arc-shaped raceway I102 and the arc-shaped raceway II 202, the external spline 101 and the internal spline 201 are in clearance fit, the outer side wall of the spline shaft 1 is provided with an annular groove 103 at the position corresponding to the external spline 101, a steel ball retainer 3 is arranged between the spline shaft 1 and the spline shaft 2 at the position corresponding to the annular groove 103, the steel ball retainer 3 comprises an arc-shaped frame body 301, and the arc-shaped frame body 301 is nested at the position corresponding to the arc-shaped raceway I102 on the spline shaft 1, the arc-shaped frame body 301 is provided with accommodating grooves 302 matched with the number of the steel balls 4 in each row on the arc-shaped rolling way I102, the structure of the accommodating grooves 302 is matched with that of the steel balls 4, the edge parts of the accommodating grooves 302 are provided with protrusions, the length of the ring grooves 103 is not less than that of the arc-shaped frame body 301, the steel balls 4 are balls in a spherical structure or rollers in a cylindrical structure, the function of transmitting torque is realized through the steel balls 4, the external splines 101 on the spline shaft 1 and the internal splines 201 on the spline pipe 2 are in clearance fit design, torque is not transmitted at the moment, when the steel balls 4 are separated or worn and fail due to special conditions, the spline teeth of the external splines 101 and the internal splines 201 can still effectively transmit torque, the function is ensured not lost, corresponding noise can be generated at the same time, an early warning effect is achieved, problems can be found in time, the ring grooves 103 are formed in the outer surface of the spline shaft 1, the space can be increased to store lubricating grease, so that the steel ball 4 can be lubricated, and meanwhile, after the spline shaft 1, the spline tube 2 and the steel ball retainer 3 are assembled, the steps at two ends of the ring groove 103 can simultaneously play an axial limiting role in the steel ball retainer 3, so that the steel ball retainer 3 is not separated, and the steel ball retainer 3 is designed into a single-row retainer to facilitate assembly.

Example two

Referring to fig. 8-10, the present embodiment is a further improvement of the first embodiment: the steel ball retainer 3 further comprises a connecting plate 303, the side walls of every two adjacent arc-shaped frame bodies 301 are connected through the connecting plate 303 to form a closed annular structure, the connecting plate 303 and the arc-shaped frame bodies 301 are of an integral structure, at least one connecting plate 303 is provided with an open slot 304, the length of the connecting plate 303 is smaller than that of the ring groove 103, the open slot 304 is of a Z-shaped structure, the open slot 304 penetrates through the side wall of the connecting plate 303, the steel ball retainer 3 is of a ball cage structure, the steel ball retainer 3 is provided with the open slot 304 of the Z-shaped structure, the steel ball retainer 3 is wrapped at the position of the ring groove 103 on the spline shaft 1, the steel ball retainer 3 is convenient to assemble, the assembling difficulty is reduced to the maximum extent, the open slot 304 can play a role in storing lubricating grease, the steel ball 4 is fully lubricated, and the abrasion of the steel ball 4 is reduced, the transmission torque is stable.

EXAMPLE III

Referring to fig. 11, the present embodiment is a variation of the second embodiment, and the difference is that: open slot 304 is the straight flute structure, and open slot 304 does not run through connecting plate 303, the quantity of open slot 304 is when a plurality of the lateral wall of connecting plate 303 is left right-hand member staggers each other and is established open slot 304, through the open slot 304 that the left and right ends of connecting plate 304 were crisscross to be seted up each other, makes steel ball holder 3 more flexible, prop open the steel ball holder 3 back nestification during the assembly at the position department of annular 103 on the integral key shaft 1 can, and steel ball 4 is lubricated more abundant, reduces the wearing and tearing of steel ball 4, and the transmission moment of torsion is more stable.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.