CN207470627U - A kind of drive shaft - Google Patents

Abstract

The utility model discloses a kind of drive shafts, including the first shaft part and the second shaft part being wholely set, the diameter of first shaft part is less than the diameter of the second shaft part, a through-hole is radially provided on first shaft part, a limit assembly is provided in through-hole, limit assembly includes the elastic component being threaded onto in the through-hole and the locating part for being fixed on elastic component both ends, the part of locating part protrudes from the outer surface of first shaft part, side of two locating parts far from second shaft part is provided with guide surface, two locating parts are provided with confined planes close to the side of the second shaft part, bearing is installed on by interference fit between the locating part and the second shaft part；The utility model strengthens the inner ring of bearing and the fixation of drive shaft in the axial direction when being equipped with bearing, increases the stability of bearing inner race and drive shaft, improves the operating accuracy for the parts being connect with bearing.

Description

A kind of drive shaft

Technical field

The utility model is related to a kind of auto parts, more particularly to a kind of drive shaft.

Background technology

In automotive field, automatic transmission can be widely used automatically according to engine speed shifting gears, wherein, it drives Moving axis is the core part in automatic transmission, and usually bearing is equipped with by interference fit in drive shaft of the prior art, Under normal conditions, one end limiting of bearing inner race is resisted against on the step end face of drive shaft, and the other end is carried out by limit stop ring Axial limiting, limit stop ring is fixedly connected by screw with the shell of speed changer, so as to fulfill the axial limiting to bearing inner race.

But automatic transmission is often vibrated in the long-term use so that the screw hair in limit stop ring It is raw to loosen, so as to cause slight axial float can occur between bearing and drive shaft, reduce between bearing and drive shaft Stability influences the operating accuracy of parts being connect with bearing.

Utility model content

The purpose of this utility model is to provide a kind of drive shaft, which solve drive shaft of the prior art and bearing in axis To fixed stability it is not high the problem of.

The above-mentioned technical purpose of the utility model technical scheme is that：

A kind of drive shaft, including the first shaft part and the second shaft part being wholely set, the diameter of the first shaft part is less than the second axis The diameter of section is radially provided with a through-hole on first shaft part, and a limit assembly is provided in through-hole, and limit assembly includes wearing Loaded on the elastic component in the through-hole and the locating part for being fixed on elastic component both ends, the part of locating part protrudes from the first axle The outer surface of section, side of two locating parts far from second shaft part are provided with guide surface, and two locating parts are close to the second shaft part Side is provided with confined planes, and bearing is installed on by interference fit between the locating part and the second shaft part.

Using the above scheme, the locating part on the first shaft part can carry out elastic shrinkage along the axis direction of through-hole, work as axis It holding when being socketed with the first shaft part by interference fit, the guide surface on locating part is first abutted with the hole wall of bearing inner race, Bearing continue to the second shaft part direction be socketed when, two locating part relative motions make elastic component be compressed to two locating parts to be completely embedded in In first shaft part, the inner ring of bearing is passed through convenient for the first shaft part.When the through-hole of the first shaft part passes fully through the inner ring of middle (center) bearing, Inner ring hole wall loses locating part pressure, and the restoring force of elastic component forces the locating part at elastic component both ends to move opposite to each other so that limit Position part outer end stretches out in the opening of through-hole so that bearing is limited between locating part and the second shaft part, relative to clamp spring Limiting, the setting of locating part avoid locating part and weaken limiting to bearing due to the relaxation of fastener, and prevention bearing is driving The axial float of axis increases the stability of bearing axial restraint, improves the operating accuracy for the parts being connect with bearing.

Further preferably：The elastic component is compressed spring.

Using the above scheme, the structure of compressed spring is simple, easy to operate, production cost is low, can widely be pushed away Extensively.

Further preferably：The diameter of second shaft part is less than the outer diameter of the inner ring of bearing.

Using the above scheme, bearing carries out axial fixation by the inner ring of bearing on the first shaft part, and the second shaft part is high The part for going out the first shaft part is abutted with the side of bearing inner race, and the radius of the second shaft part is less than the outer diameter of bearing, avoids second The part that shaft part is higher by the first shaft part abuts and influences the rotation of drive shaft, and then improve drive with the ball generation activity of bearing The transmission efficiency of moving axis.

Further preferably：The height that the locating part protrudes from the part of first shaft part is less than the interior of the bearing Enclose thickness.

Using the above scheme, bearing carries out axial fixation, locating part protrusion by the inner ring of bearing on the first shaft part Partial height is less than the thickness of inner ring, avoids excessively high and with bearing the ball generation activity of locating part protrusion and abuts, to driving The rotation of moving axis has an impact.

Further preferably：The section of the locating part is in T shape, the first limit abutted including side with the elastic component Position portion and the second limiting section being connect with the first limiting section opposite side, the radical length of first limiting section are more than the second limit The radical length in position portion, the opening of the through-hole are fixedly connected with the spacing ring walked for second limiting section.

Using the above scheme, locating part is installed in through-hole, and the second limiting section navigates within limiting under the action of elastic component In the annular distance of ring, when being socketed bearing, the end of the second limiting section is embedded in the installation for being convenient for bearing in through-hole, when bearing installs Bi Shi, the end of the second limiting section are protruded to the limiting of bearing on the outer wall of drive shaft, while spacing ring is to the first limiting section It is limited, locating part is prevented to be detached along the radial direction of the first shaft part with shaft part, it is simple in structure, it is easy to operate, reduce life of knowing clearly Produce cost.

Further preferably：The guide surface is set to the end of second limiting section in arc-shaped.

Using the above scheme, when bearing is inserted in first axle section, guide surface protrudes from the outer wall of drive shaft first and in bearing The hole wall of circle abuts, and the guide surface of arc-shaped is convenient for the rapid desufflation of locating part, so as to accelerate the quick socket of bearing.

Further preferably：The confined planes be set to the end of second limiting section and with the end of second shaft part Face is arranged in parallel.

Using the above scheme, when bearing is installed on the first shaft part, the confined planes being arranged in parallel protrude from drive shaft Outer wall is simultaneously bonded completely with the end face of bearing, is increased bearing and is given pressure confined planes and vertical with the shrinkage direction of locating part Power is increased after locating part pops up to bearing restriction effect.

Further preferably：The side of first shaft part far from the second shaft part is provided with chamfering.

Using the above scheme, when bearing and the first shaft part are interference fitted, chamfering is convenient for bearing Fast Installation in the On one shaft part, the installation effectiveness of bearing is improved.

In conclusion the utility model has the advantages that：

1st, by the setting of limit assembly and the second shaft part, the both ends of bearing are limited, prevent bearing along driving Axial sliding occurs for axis, and then strengthens the inner ring of bearing and the fixation of drive shaft in the axial direction, increase the inner ring of bearing with The stability of drive shaft improves the transmission efficiency of drive shaft；

2nd, by the setting of guide surface and chamfering, contribute to bearing Fast Installation on the first shaft part, improving bearing peace The working efficiency of dress.

Description of the drawings

Fig. 1 is the structure diagram of drive shaft；

Fig. 2 is the structure diagram for the drive shaft for being equipped with bearing；

Fig. 3 is the internal explosion schematic diagram that limit assembly is installed on the first shaft part.

In figure, the 1, first shaft part；2nd, the second shaft part；3rd, third shaft part；4th, limit assembly；5th, bearing；11st, chamfering；12nd, lead to Hole；121st, limiting slot；122nd, spacing ring；41st, elastic component；42nd, locating part；421st, the first limiting section；422nd, the second limiting section； 4221st, guide surface；4222nd, confined planes；51st, inner ring.

Specific embodiment

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

A kind of drive shaft, as shown in Figure 1, including the first shaft part 1, the second shaft part 2 and third axis that are wholely set successively Section 3.Wherein, the first shaft part 1, the second shaft part 2 and third shaft part 3 are coaxially disposed.

As shown in Fig. 2, the diameter of limit assembly 4 there are one being installed on the first shaft part 1, the first shaft part 1 and third shaft part 3 is equal Less than the diameter of the second shaft part 2, bearing 5 is socketed on the outside of the first shaft part 1, and a side end face of bearing 5 by interference fit It is bonded with limit assembly 4, another side end face of bearing 5 is bonded with the second shaft part 2, and the outer diameter of the inner ring 51 of bearing 5 is more than second The diameter of shaft part 2.The side of first shaft part 1 and third shaft part 3 far from the second shaft part 2 is additionally provided with chamfering 11 so that first axle The end of section 1 and third shaft part 3 is in round table-like, and the smaller one end of round platform is far from the second shaft part 2.

As shown in figure 3, limit assembly 4 includes elastic component 41 and two locating parts 42, there are one 1 radial direction of the first shaft part opens up For the through-hole 12 that limit assembly 4 is installed, elastic component 41 is threaded onto for compressed spring in through-hole 12, and two locating parts 42 are fixed respectively In the both ends of elastic component 41.The section of locating part 42 is in T shape, the first limiting section 421 abutted including side with elastic component 41 With the second limiting section 422 for being fixedly connected on 421 opposite side of the first limiting section.Wherein, the first limiting section 421 is cylindric, the Two limiting sections 422 are flat column, and the radical length of the first limiting section 421 is more than the radical length of the second limiting section 422.

The opening both ends of through-hole 12 are respectively opened up there are one limiting slot 121, are embedded in limiting slot 121 fixed by screw Spacing ring 122.Second limiting section 422 passes through the annular distance of spacing ring 122 in the support next part of elastic component 41 and protrudes from the The outer wall of one shaft part 1, and locating part 42 protrudes the height of part less than bearing 5（As shown in Figure 2）Inner ring 51 thickness, limiting The annular distance hole wall of ring 122 is abutted with the outer wall of the second limiting section 422.The end of second limiting section 422 protrusion part is far from the Two shaft parts 2（As shown in Figure 2）Side be provided with the guide surface 4221 of arc-shaped, be provided with close to the side of the second shaft part 2 Confined planes 4222, and confined planes 4222 and the end face of the second shaft part 2 are arranged in parallel.

The course of work：

When installing bearing 5 by interference fit, the guide surface 4221 of locating part 42 is first supported with the hole wall of 5 inner ring 51 of bearing It connecing, two locating parts, 42 relative motion makes elastic component 41 be compressed to two the second limiting sections 422 to be completely embedded in the first shaft part 1, When the inner ring 51 of bearing 5 passes fully through the through-hole 12 of the first shaft part 1,51 hole wall of inner ring loses pressure to locating part 42, elasticity The restoring force of part 41 forces the locating part 42 at 41 both ends of elastic component to move opposite to each other so that the second limiting section 422 stretches out in spacing ring 122 annular distance, so that end face of the both ends of the surface of 5 inner ring of bearing respectively with 4222 and second shaft part 2 of confined planes abuts, with reality The fixation of 5 inner ring 51 of existing bearing.

This specific embodiment is only explanation to the utility model, is not the limitation to the utility model, ability Field technique personnel can as needed make the present embodiment the modification of no creative contribution after this specification is read, but As long as within the protection scope of the present utility model all protected by Patent Law.

Claims (8)

1. a kind of drive shaft, including the first shaft part (1) being wholely set and the second shaft part (2), the diameter of the first shaft part (1) is less than The diameter of second shaft part (2), it is characterized in that：A through-hole (12) is radially provided on first shaft part (1), is set in through-hole (12) It is equipped with a limit assembly (4), limit assembly (4) is including the elastic component (41) that is threaded onto in the through-hole (12) and is fixed on elasticity The locating part (42) at part (41) both ends, the part of locating part (42) protrude from the outer surface of first shaft part (1), two locating parts (42) side far from second shaft part (2) is provided with guide surface (4221), and two locating parts (42) are close to the second shaft part (2) Side is provided with confined planes (4222), bearing (5) by interference fit be installed on the locating part (42) and the second shaft part (2) it Between.

2. a kind of drive shaft according to claim 1, it is characterized in that：The elastic component (41) is compressed spring.

3. a kind of drive shaft according to claim 1, it is characterized in that：The diameter of second shaft part (2) is less than bearing (5) Inner ring (51) outer diameter.

4. a kind of drive shaft according to claim 1, it is characterized in that：The locating part (42) protrudes from first shaft part (1) height of part is less than inner ring (51) thickness of bearing (5).

5. a kind of drive shaft as claimed in any of claims 1 to 4, it is characterized in that：The locating part (42) is cut Face is in T shape, the first limiting section (421) for being abutted including side with the elastic component (41) and with the first limiting section (421) The second limiting section (422) of opposite side connection, the radical length of first limiting section (421) are more than the second limiting section (422) Radical length, the opening of the through-hole (12) is fixedly connected with the spacing ring walked for second limiting section (422) (122)。

6. a kind of drive shaft according to claim 5, it is characterized in that：The guide surface (4221) is set to institute in arc-shaped State the end of the second limiting section (422).

7. a kind of drive shaft according to claim 5, it is characterized in that：The confined planes (4222) are set to second limit The end in position portion (422) is simultaneously arranged in parallel with the end face of second shaft part (2).

8. a kind of drive shaft as claimed in any of claims 1 to 4, it is characterized in that：First shaft part (1) is separate The side of second shaft part (2) is provided with chamfering (11).