CN209441437U - A kind of full-rolling type spline pair - Google Patents

Abstract

A kind of full-rolling type spline pair, automobile steering system parts technical field, including the transmission shaft and splined sleeve being mutually socketed, the transmission axial wall plane is equipped with the external splines engaged with the internal spline of the splined sleeve inner wall, the first track groove is equipped between every two internal splines, the second track groove corresponding with first track groove is equipped at the top of each external splines, the in-line retainer with ball is equipped between first track groove and the second track groove, the transmission shaft is inserted into the spline housing pipe end and is connected with the first annular retainer with ball, the splined sleeve open end is connected with the second annular retainer with ball.By the full-rolling type spline pair, rolling cooperation of the spline pair in whole adjustment lengths may be implemented, to have anti-wear, the vibration damping, noise reduction effect substantially completely covered.

Description

A kind of full-rolling type spline pair

Technical field

The utility model relates to automobile steering system parts technical field more particularly to a kind of full-rolling type spline pairs.

Background technique

Currently, the steering transmission linkage in vehicle, generally be can the spline pair of relative telescopic pass through flower at work Key connecting realizes the transmitting of driving torque, is stretched when user adjusts the position of steering wheel to adapt to its vehicle driving posture by opposite Adaptation is realized in contracting.The spline pair that majority auto vendor uses at present is all part in ball spline type structure, to partially remove Frictional resistance between the interior external splines of engagement, facilitates telescopic adjustment, while decreasing and mutually wearing, reducing what friction generated It vibrates, reduce friction noise.

A kind of ball spline type as described in the Chinese utility model patent application No. is 200420079174.3, which turns to, to be passed Dynamic device realizes disappearing for the force of sliding friction between splined sleeve and steering drive axle by the structure of one section of ball spline type It removes.But to have the problem that the ball spline pair of its retainer composition can not be manufactured into longer to covering whole section for the spline pair The length of spline fitted section, because one side cost is excessively high, another aspect ball retainer can not leave cooperation section, otherwise ball Can fall leads to failure mechanisms.Because the shorter retainer of above-mentioned reason cooperates when short distance telescopic adjustment in rolling；But It is when long range is flexible, telescopic adjustment movement certainly exists and be axially in the lateral force of angle under reality, and lateral force is applied It is smaller in overall dimension when being added on shorter retainer, and the contact point for being easy to be equivalent to sliding occurs be applied power The compression in direction is slided, and all flexible situations can not be adapted to.

Utility model content

The purpose of this utility model is to provide a kind of full-rolling type spline pair, to solve above-mentioned in the prior art ask By the full-rolling type spline pair rolling cooperation of the spline pair in whole adjustment lengths may be implemented, to have basic in topic Anti-wear, the vibration damping, noise reduction effect being completely covered.

To realize purpose of utility model, the utility model is adopted the technical scheme that

A kind of full-rolling type spline pair, including the transmission shaft and splined sleeve being mutually socketed, the transmission axial wall plane is equipped with The external splines engaged with the internal spline of the splined sleeve inner wall is equipped with the first track groove between every two internal splines, each The second track groove corresponding with first track groove, first track groove and the second track groove are equipped at the top of the external splines Between be equipped with the in-line retainer with ball, the transmission shaft is inserted into the spline housing pipe end and is connected with the first ring with ball Shape retainer, the splined sleeve open end are connected with the second annular retainer with ball.

As the preferred of the utility model, the transmission shaft include preposition section set gradually from the front to the back, middle section and after Section is set, the first annular retainer is located at described preposition section, and the external splines is located at the middle section.

As the preferred of the utility model, the middle section both ends connect with described preposition section and postposition section junction in rotary table It connects.

As the preferred of the utility model, the first annular retainer includes the first frame body of open annular, and described One frame body is nested in the transmission shaft, and the external anchor ring of first is there are the first ball-and-socket of multiple circumference uniform distributions, and described One ball-and-socket bottom has backwards to the first mounting hole to annular axis.

As the preferred of the utility model, there are the first spring in first mounting hole, the ball is placed in institute It states in the first ball-and-socket, first both ends of the spring only supports first mounting hole bottom surface and the ball spherical surface respectively.

As the preferred of the utility model, second annular retainer includes the second frame body of open annular, and described Two frame bodies are nested in the splined sleeve inner wall, the second frame body inner ring surface there are the second ball-and-socket of multiple circumference uniform distributions, Second ball-and-socket bottom has the second mounting hole towards annular axis.

As the preferred of the utility model, there are second spring in second mounting hole, the ball is placed in institute It states in the second ball-and-socket, second mounting hole bottom surface and the ball spherical surface are only supported in the second spring both ends respectively.

As the preferred of the utility model, the splined sleeve open end has outwardly extending gripping section, the clamping Section includes multiple circumferentially spaced clamping walls, and there are safeties in the clamping wall outside.

As the preferred of the utility model, the safety is in the elastic ring being open.

As the preferred of the utility model, there are being fixed between second annular retainer position and the gripping section State the sealing ring of splined sleeve inner wall.

The utility model has the beneficial effects that:

1, matched by the rolling that in-line retainer, first annular retainer and the second annular retainer form 3 points of interval It closes, increases the effective length for rolling cooperation to entire spline pair length of fit, while the length of in-line retainer is still shorter, it can To provide longer distance of stretch out and draw back；

2, the elasticity of ball is stopped the stabilization supported when guaranteeing its work and is connect in first annular retainer and the second annular retainer Touching, so that cooperation is rolled by stablizing for basic overall length, so that noise is not small, easy to wear, with small vibration when spline pair flex acts；

3, damping when telescopic adjustment can be provided by gripping section and safety, while being traffic accident occurs The crumple of spline pair can be fast implemented to protect driver.

Detailed description of the invention

Fig. 1 is the schematic cross-section of the utility model；

Fig. 2 is the enlarged partial cross-sectional schematic diagram at the first annular retainer of the utility model；

Fig. 3 is the enlarged partial cross-sectional schematic diagram at the second annular retainer of the utility model；

Fig. 4 is the schematic three dimensional views at the utility model gripping section；

It is every in figure are as follows: 1 transmission shaft, 11 external splines, 12 second track grooves, 13 preposition sections, 14 middle sections, 15 postposition sections, 2 Splined sleeve, 21 internal splines, 22 first track grooves, 3 in-line retainers, 4 first annular retainers, 41 first frame bodies, 42 first Ball-and-socket, 43 first mounting holes, 44 first springs, 5 second annular retainers, 51 second frame bodies, 52 second ball-and-sockets, 53 second installations Hole, 54 second springs, 6 balls, 7 gripping sections, 71 clamping walls, 72 safeties, 73 sealing rings.

Specific embodiment

The utility model is described in detail below in conjunction with attached drawing:

A kind of full-rolling type spline pair as shown in Figure 1, including the transmission shaft 1 and splined sleeve 2 being mutually socketed, transmission shaft 1 wall surface is equipped with the external splines 11 engaged with the internal spline 21 of 2 inner wall of splined sleeve, and transmission shaft 1 includes setting gradually from the front to the back Preposition section 13, middle section 14 and postposition section 15, external splines 11 is located at middle section 14, and the circumscribed circle diameter of external splines is slightly larger than preposition section 13 and postposition section 15 diameter, so that preposition section 13 and postposition section 15 can be convenient, without being inserted into colliding in splined sleeve 2.In 14 both ends of section are connect with preposition section 13 and 15 junction of postposition section in rotary table, pass through being smoothly connected convenient for following second for rotary table The stretching of ball in annular retainer 5.The first track groove 22 is equipped between every two internal splines 21, each external splines 11 pushes up Portion is equipped with second track groove 12 corresponding with the first track groove 22, limits between every a pair of first track groove 22 and the second track groove 12 In-line retainer 3 with ball 6 is installed, in-line retainer 3 is fixed on middle section so that this section be in rolling contact with The relative motion of transmission shaft 1 and splined sleeve 2 and move therewith, transmission shaft 1 be inserted into 2 end of splined sleeve be connected with ball 6 First annular retainer 4, i.e., first annular retainer 4 be located at preposition section 13,2 open end of splined sleeve is connected with ball 6 the second annular retainer.

As shown in Fig. 2, first annular retainer 4 includes the first frame body 41 of open annular, the first frame body in the present embodiment 41 are nested in an annular groove on transmission shaft 1, are made up of spring steel, structure proximate opening circlip, by strutting It, which is open, is socketed on the support for unclamping opening after ring slot outside and makes its clamping again in annular groove, the outer ring surface of the first frame body 41 It is machined with the first ball-and-socket 42 of multiple circumference uniform distributions, 42 bottom of the first ball-and-socket has backwards to the first mounting hole to annular axis 43, which is non-through hole.The first spring 44 of column type is placed in first mounting hole 43, ball 6 is placed In in the first ball-and-socket 42,6 spherical surface of 43 bottom surface of the first mounting hole and ball is only supported at 44 both ends of the first spring respectively.In 1 He of transmission shaft After splined sleeve 2 is socketed, the outside of ball 6 is stopped with 2 inner wall of splined sleeve and the first track groove 22 supports the chimeric rolling for being formed and being limited Ball 6 is effectively only against on splined sleeve 2 by the elastic force of dynamic cooperation, the first spring 44, guarantees the validity being in rolling contact.

As shown in figure 3, the second annular retainer 5 includes the second frame body 51 of open annular, the second frame body in the present embodiment 51 are nested in an annular groove on 2 inner wall of splined sleeve, and structure, that is, mounting means is similar to above-mentioned first frame body 41, the Two frame bodies, 51 inner ring surface is machined with the second ball-and-socket 52 of multiple circumference uniform distributions, and 52 bottom of the second ball-and-socket has towards annular axis The second non-through mounting hole 53.The second spring 54 of cylindrical form is placed in second mounting hole 53, ball 6 is placed in In two ball-and-sockets 52,6 spherical surface of 53 bottom surface of the second mounting hole and ball is only supported at 54 both ends of second spring respectively.In transmission shaft 1 and spline After casing 2 is socketed, the inside of ball 6 and the wall surface of transmission shaft 1 and the second track groove 12, which are only supported to be formed, rolls cooperation, with flexible The progress of movement, positioned at the second annular retainer 5 ball 6 can in by preposition section 13 backward to the contact of postposition section 15, Because each section of contact surface distance is different, ball 6 effectively only can be against its contact by its elastic force by second spring 54 Surface on guarantee the validity being in rolling contact.

As shown in figure 4,2 open end of splined sleeve has outwardly extending gripping section 7 in the present embodiment, gripping section 7 passes through Fluting forms multiple circumferentially spaced petaloid clamping walls 71, and 71 outer sheath of clamping wall is equipped with safety 72.Safety 72 In the thin-walled elastic ring of opening, cross section structure is similar to the circlip that is open, and is acted on by the elastic tightening of safety 72, petaloid In the postposition section 15 that clamping wall 71 is held on transmission shaft 1 to interior tightening after transmission shaft 1 and splined sleeve 2 are socketed, to pass through Transmission shaft 1 and splined sleeve 2 disengage when the limit of this closing in form prevents expanding-contracting action excessive；This clamping force can be with simultaneously Certain damping is formed, so that there is no that driver's tune will not be facilitated because gravity slides automatically between spline pair when external force Save operation when retracted position.Meanwhile when vehicle collision accident occurs, collide generation impact force drive it is opposite between spline pair Movement, the thin-walled feature of safety 72 be broken it can under a larger impact force, to make from the limit opened between spline pair Its quick crumple, prevents to driver.There are be fixed in spline housing between second annular retainer position and gripping section 7 The sealing ring 73 of 2 inner wall of pipe prevents dust from entering the auxiliary section between transmission shaft 1 and splined sleeve 2 to seal extraneous dust Dividing, which leads to roll the abrasion cooperated, is adhered failure.

Above embodiments are only described preferred embodiments of the present invention, not to the structure of the utility model Think and range is defined, without departing from the design concept of the present utility model, ordinary people in the field is practical new to this The all variations and modifications that the technical solution of type is made each fall within the protection scope of the utility model, the utility model request The technology contents of protection, are all described in the claims.

Claims (10)

1. a kind of full-rolling type spline pair, including the transmission shaft (1) and splined sleeve (2) being mutually socketed, which is characterized in that described Transmission shaft (1) wall surface is equipped with the external splines (11) that engages with the internal spline (21) of the splined sleeve (2) inner wall, and described every two The first track groove (22) are equipped between internal spline (21), are equipped with and first track groove (22) at the top of each external splines (11) Corresponding second track groove (12) is equipped with straight with ball (6) between first track groove (22) and the second track groove (12) Column retainer (3), the transmission shaft (1) are inserted into splined sleeve (2) end and are connected with the first annular holding with ball (6) Frame (4), splined sleeve (2) open end are connected with the second annular retainer (5) with ball (6).

2. a kind of full-rolling type spline pair according to claim 1, which is characterized in that the transmission shaft (1) includes by preceding Preposition section (13), middle section (14) and the postposition section (15) set gradually backward, the first annular retainer (4) be located at it is described before It sets section (13), the external splines (11) is located at the middle section (14).

3. a kind of full-rolling type spline pair according to claim 2, which is characterized in that middle section (14) both ends with it is described It is connected with postposition section (15) junction in rotary table for preposition section (13).

4. a kind of full-rolling type spline pair according to claim 1 or 2 or 3, which is characterized in that the first annular holding Frame (4) includes the first frame body (41) of open annular, and first frame body (41) is nested in the transmission shaft (1), and described first Frame body (41) outer ring surface there are the first ball-and-socket (42) of multiple circumference uniform distributions, the first ball-and-socket (42) bottom have backwards to The first mounting hole (43) of annular axis.

5. a kind of full-rolling type spline pair according to claim 4, which is characterized in that the first mounting hole (43) memory Having the first spring (44), the ball (6) is placed in first ball-and-socket (42), the first spring (44) both ends difference Only support the first mounting hole (43) bottom surface and the ball (6) spherical surface.

6. a kind of full-rolling type spline pair according to claim 1 or 2 or 3, which is characterized in that second annular retaining Frame (5) includes the second frame body (51) of open annular, and second frame body (51) is nested in the splined sleeve (2) inner wall, institute Second ball-and-socket (52) of the second frame body (51) inner ring surface there are multiple circumference uniform distributions is stated, the second ball-and-socket (52) bottom has Towards the second mounting hole (53) of annular axis.

7. a kind of full-rolling type spline pair according to claim 6, which is characterized in that the second mounting hole (53) memory Having second spring (54), the ball (6) is placed in second ball-and-socket (52), second spring (54) the both ends difference Only support the second mounting hole (53) bottom surface and the ball (6) spherical surface.

8. a kind of full-rolling type spline pair according to claim 1, which is characterized in that splined sleeve (2) open end With outwardly extending gripping section (7), the gripping section (7) includes multiple circumferentially spaced clamping walls (71), the folder Holding wall (71) outside, there are safety (72).

9. a kind of full-rolling type spline pair according to claim 8, which is characterized in that the safety (72) is in opening Elastic ring.

10. a kind of full-rolling type spline pair according to claim 9, which is characterized in that second annular retainer (5) There are the sealing rings (73) for being fixed in the splined sleeve (2) inner wall between position and the gripping section (7).