CN101260910B

CN101260910B - Inner fork chute type axially sliding constant-velocity-ratio universal joint

Info

Publication number: CN101260910B
Application number: CN200810060347XA
Authority: CN
Inventors: 周俭
Original assignee: WENZHOU GSP AUTOMOTIVE GROUP CO Ltd
Current assignee: WENZHOU GSP AUTOMOTIVE GROUP CO Ltd
Priority date: 2008-04-07
Filing date: 2008-04-07
Publication date: 2010-06-09
Anticipated expiration: 2028-04-07
Also published as: CN101260910A

Abstract

The invention relates to an automobile transmission gimbal joint, in particular to an inner fork slideway type axially slidable constant speed gimbal joint, comprising a housing, a three-pin shelf, ball rings respectively and slidably sleeved on each foot axis of the three-pin shelf, ball paths matched with the ball rings, and a dirt shroud. The gimbal joint is characterized in that the gimbal joint further comprises a trifurcate joint which is a component on which three ball paths are circumferentially arranged, and the axle center of which is provided with a center hole. The trifurcate joint is fixed on one end of a middle shaft, and the center hole is radially communicated with the three ball paths. The center hole and the three ball paths are axially communicated with the end surface of the end of the middle shaft and the end on which the trifurcate joint is fixed. The three-pin shelf is sleeved on the trifurcate joint. The ball rings sleeved on the foot axis of the three-pin shelf and the ball paths form rolling or/and sliding fit. The three-pin shelf is fixed on the inner cavity of the housing. The gimbal joint is low in production cost, high in assembly precision and stable in product quality.

Description

Inner fork chute type axially sliding constant-velocity-ratio universal joint

Technical field

The present invention relates to a kind of vehicle transmission universal joint, particularly a kind of inner fork chute type axially sliding constant-velocity-ratio universal joint.

Background technique

The transmission shaft that is used for the automobile power transmission generally all is to be made of fixed end universal joint, jack shaft and slippage end universal joint, and the fixed end universal joint is connected in the automotive wheel end, and slippage end universal joint is connected in the motor end.What present slippage end universal joint usually adopted is the three ball pin style axially sliding constant-velocity-ratio universal joint, and this universal joint has the following disadvantages: 1, alley is integrally formed at shell inner cavity and makes the wall thickness of inner chamber need strengthen a lot, has increased raw-material consumptive material so greatly.2, with the shell blank of three alleys need adopt the warm forging cold sperm squeeze blank, the technological requirement height of this blank and price are than common forge hot blank expensive 30%.3, after being carried out intermediate frequency heat treatment, alley makes the alley distortion easily, because the alley of shell is in semi-closed state, after heat treatment, can't carry out alley reprocessing, so the ball that rolls at alley and the matching gap of alley are just inconsistent, can influence fit up gap and the performance and the efficient of product like this, finally influence the quality of product.4, the internal spherical cage of original structure is that floating type spider by three balls and needle roller location is connected semiaxis and slides between the shell alley and swing, and the slippage of this ball on spider little these two reasons of inner ball surface the diameter smaller and formation of inner chamber three alleys cause the driving angle of internal spherical cage smaller (≤22 °).5, the external form of dirt-proof boot is dark undulatory revolution rubber parts, and length is longer, complex contour, and the manufacture cost height, anti-centrifugal anti-deforming weak effect, damaged easily.

Summary of the invention

It is low to the purpose of this invention is to provide a kind of cost, assembly precision height, the inner fork chute type axially sliding constant-velocity-ratio universal joint of constant product quality.

Purpose of the present invention is achieved through the following technical solutions: a kind of inner fork chute type axially sliding constant-velocity-ratio universal joint, include shell, spider, slip is set in the ball on each pin axle of spider respectively, alley that matches with ball and dust-proof cover, it is characterized in that: also include three knuckles, described three knuckles are for circumferentially being evenly equipped with three alleys, the axle center is provided with the member of center hole, three knuckles are fixed on an end of jack shaft, and center hole is radially communicating with three alleys, center hole and three alleys are at the end face of the other end of in the middle of three knuckles are fixed in axle head that axially communicates, described spider is set on three knuckles, be set in ball and alley on the pin axle of spider constitute roll or/cooperate with slippage, described spider is fixed in the inner chamber of shell.

Further, circumferentially be equipped with three radial direction through hole on the described shell, close-fitting has fixed cover in each through hole, and spider is located in the fixed cover by the tripod axle sleeve and fixedlys connected with shell.

Further again, described dust-proof cover includes big ring, little ring and intermediate connecting ring, arc transition between little ring and the intermediate connecting ring, big ring closely is fixed on the outer wall of shell, the end that is close to big ring direction of little ring closely is fixed on the outer wall that three knuckles rely on jack shaft one end, and the arc transition end is positioned at the end away from big ring of little ring.

Further again, the center hole of described three knuckles is a through hole, close jack shaft place at through hole is provided with the jump ring groove, the corresponding jump ring groove of establishing on the jack shaft, three knuckles are fixedlyed connected with jack shaft by spline, jump ring groove and jump ring, be provided with stifle at three knuckle center holes corresponding to the bottom position of alley, this valve gap makes the two ends of center hole isolated

The present invention has following beneficial effect: 1, alley is not arranged on the shell, the wall thickness of shell can be reduced greatly, increased the shell inner cavity space like this, raw material have been reduced, and alleviate the weight of product, thereby solved the expensive situation that conventional enclosure adopts expensive finish forge blank to cause, the more important thing is that stopping old structural housing alley causes ball to cooperate the bad quality of product that influences with alley because of heat treatment causes the alley distortion.2, change the former floating type spider of three balls and needle roller location that leans on into be fixed on the shell spider, simplify the structure of spider like this and cancelled needle roller and some findings, dwindle the external diameter of ball and increased the axial slip amount of three knuckles, eliminate original structure assembling total backlash, strengthened the pivot angle of semiaxis.3, three alley designs are on three knuckles, can adopt the simple again forge hot blank of low cost like this, and be simple, and after heat treatment, can adopt hard miller skill elimination quenching distortion to reach and well assemble effect with ball to the technological requirement of intermediate frequency induction heat treatment.

Description of drawings

Fig. 1 is the structural representation of the embodiment of the invention

Fig. 2 is the A-A sectional view among Fig. 1

Embodiment

Now in conjunction with the accompanying drawings embodiments of the present invention are described in detail:

As Fig. 1, shown in Figure 2, the embodiment of a kind of inner fork chute type axially sliding constant-velocity-ratio universal joint of the present invention, include shell 1, spider 4, slip is set in the ball 5 on each pin axle 4a of spider 4 respectively, alley that matches with ball 5 and dust-proof cover 10, also include three knuckles 2, described three knuckles 2 are for circumferentially being evenly equipped with three alley 2b (circumferentially uniform three alley 2b trisection on the circumference of three knuckles that is meant distributes), the axle center is provided with the member of center hole 2a, three knuckles 2 are fixed on an end of jack shaft 11, and center hole 2a is radially communicating with three alley 2b, center hole 2a and three alley 2b are axially communicating in the end face (promptly the left end of three knuckles 2 is openings) of three the other ends of jack shaft 11 ends that knuckle 2 is fixed in, described spider 4 is set on three knuckles 2 (to enter from the left end cover of three knuckles 2), be set in ball 5 and alley 2b on the pin axle 4a of spider 4 constitute roll or/cooperate with slippage (to be meant that the two only constitutes the slippage cooperation sometimes, sometimes the two only constitutes the cooperation of rolling, but doing slippage sometimes simultaneously cooperates with rolling), described spider 4 is fixed in the inner chamber of shell 1.

In the present embodiment, for the ease of installing and fixing of spider 4, circumferentially be equipped with three radial direction through hole 1a (circumferentially all establish and be meant that trisection distributes on circumference) on the described shell 1, close-fitting has fixed cover 3 in each through hole 1a, and spider 4 is set in the fixed cover 3 by tripod axle 4a and fixedlys connected with shell 1.During installation, earlier the tripod axle 4a of spider 4 is set in three through hole 1a of shell 1 (because through hole is greater than the diameter of pin axle 4a, therefore can easily tripod axle 4a be inserted in three through hole 1a), and then in each through hole 1a, be pressed into fixed cover 3, the endoporus of fixed cover 3 closely is set in pin axle 4a simultaneously and goes up (consider the steadiness that fixed cover is installed, also can weld) after fixed cover 3 is inserted in through hole 1a.

The center hole 2a of three knuckles 2 in the present embodiment is a through hole, be provided with splined hole near middle axle head, close jack shaft place at through hole is provided with the jump ring groove, the corresponding jump ring groove of establishing on the jack shaft 11, the distolateral spline that is provided with of jack shaft, the close middle axle head of three knuckles is provided with splined hole, three knuckles 2 pass through spline, jump ring groove and jump ring 9 are fixedlyed connected with jack shaft 11, be provided with stifle 7 at three knuckle center hole 2a corresponding to the bottom position of alley 2b, this valve gap 7 makes the two ends of center hole 2a isolated, by this stifle 7 is set, make the lubricant oil (grease) of alley can not ooze out from this center hole, and realize sealing by dust-proof cover 10 between shell 1 inner chamber and three knuckles 2, thereby guaranteed not revealing of lubricant oil (grease).

In the illustrated implementation column, described dust-proof cover 10 includes big ring 10a, little ring 10c and intermediate connecting ring 10b, arc transition between little ring 10c and the intermediate connecting ring 10b, big ring 10a closely is fixed on the outer wall of shell 1 with big clip 6, the end (being left end) that is close to big ring 10a direction of little ring 10c closely is fixed on the outer wall (i.e. the right-hand member of three knuckles 2) that three knuckles 2 rely on jack shaft 11 1 ends with lesser calorie hoop 8, the arc transition end is positioned at the end away from big ring 10a of little ring 10c, it also is the right-hand member that lesser calorie hoop 8 is buckled in the left end of little ring 10c three knuckles 2, and the right-hand member of little ring 10c is connected with intermediate connecting ring 10b by circular arc, intermediate connecting ring 10b is connected on the big ring 10a again, like this, three knuckles 2 are when slippage, mainly utilize the distortion of the left end of circular arc and little ring to realize stretching, the simple volume of dirt-proof boot external form of this structure is little, manufacturing requires the end to mould, and stretchability is good, the universal joint anti-centrifugal anti-deforming when high speed rotating that is marked with grease in inside is effective, in addition, the little ring of the dirt-proof boot of present embodiment is fixed on three knuckles, has changed conventional fixed on jack shaft.And original traditional dirt-proof boot be external form is dark undulatory revolution rubber parts, and length is longer, complex contour, manufacture cost height, anti-centrifugal anti-deforming weak effect.

The embodiment of the invention creatively is fixed on spider on the shell, and alley is arranged on three knuckles of fixedlying connected with jack shaft, changed people's thinking stationary all the time, has following advantage: 1, alley is not arranged on the shell, the wall thickness of shell can be reduced greatly, increased the shell inner cavity space like this, reduced by 35% raw material, and alleviate the weight of product, thereby solved the expensive situation that conventional enclosure adopts expensive finish forge blank to cause, the more important thing is that stopping old structural housing alley causes ball to cooperate the bad quality of product that influences with alley because of heat treatment causes the alley distortion.2, change the former floating type spider of three balls and needle roller location that leans on into be fixed on the shell spider, simplify the structure of spider like this and cancelled needle roller and some findings, dwindle the external diameter of ball and increased the axial slip amount of three knuckles, eliminated original structure assembling total backlash, thereby the slippage of the ball on the spider of new structure is than 2 times of pivot angles that strengthen semiaxis of slippage increase of original structure.3, three alley designs are on three knuckles, can adopt the simple again forge hot blank of low cost like this, and be simple, and after heat treatment, can adopt hard miller skill elimination quenching distortion to reach and well assemble effect with ball to the technological requirement of intermediate frequency induction heat treatment.

It needs to be noted: though described the specific embodiment of the present invention in conjunction with the accompanying drawings, present technique field those of ordinary skill can be made various distortion or modification within the scope of the appended claims.

Claims

1. inner fork chute type axially sliding constant-velocity-ratio universal joint, include shell, spider, dust-proof cover, slip is set in the ball on each pin axle of spider respectively, and three knuckle, described three knuckles are for circumferentially being evenly equipped with three alleys, the axle center is provided with the member of center hole, three knuckles are fixed on an end of jack shaft, and center hole is radially communicating with three alleys, center hole and three alleys are axially communicating in the end face away from jack shaft of three knuckles, and described spider is set on three knuckles, be set in ball and alley on the pin axle of spider constitute roll or/cooperate with slippage, described spider is fixed in the inner chamber of shell, it is characterized in that: circumferentially be equipped with three radial direction through hole on the described shell, close-fitting has fixed cover in each through hole, and spider is located in the fixed cover by the tripod axle sleeve and fixedlys connected with shell.

2. the described inner fork chute type axially sliding constant-velocity-ratio universal joint of claim 1, it is characterized in that: described dust-proof cover includes big ring, little ring and intermediate connecting ring, big ring closely is fixed on the outer wall of shell, little ring closely is fixed on the outer wall of three knuckles, the little ring end of dust-proof cover bends to big ring direction, makes between little ring and the intermediate connecting ring and forms arc transition.

3. claim 1 or 2 described inner fork chute type axially sliding constant-velocity-ratio universal joints, it is characterized in that: the center hole of described three knuckles is a through hole, close jack shaft place at through hole is provided with the jump ring groove, the corresponding jump ring groove of establishing on the jack shaft, three knuckles are fixedlyed connected with jack shaft by spline, jump ring groove and jump ring, be provided with stifle at three knuckle center holes corresponding to the bottom position of alley, this stifle makes the two ends of center hole isolated.