CN211623593U - Isolator for starter of hybrid power light automobile - Google Patents

Abstract

The utility model discloses an isolator for hybrid light automobile starter, include the gear shaft as an organic whole with the gear, install the star wheel outside the gear shaft, the star wheel includes major diameter part and path part, the minor diameter part divide into the integral key shaft matched with spline housing with the drive shaft of starter, the downthehole radial bulge loop to the spline housing axial spacing that has of spline housing, radial bulge loop in have a plurality of openings towards the blind hole of integral key shaft, all have a second pressure spring in every blind hole, every second pressure spring front end all has a steel ball, radial bulge loop is fixed with a gland on the terminal surface of integral key shaft, press to cover and have a plurality ofly with blind hole and steel ball one-to-one's through-hole, the aperture of through-hole is less than the radius of steel ball and makes steel ball protrusion in the terminal surface of the integral key shaft of gland towards the integral key shaft, the terminal surface elasticity rolling friction of many steel balls and integral. The isolator can prevent the spline shaft from being blocked in the inner hole of the spline sleeve and enables the spline shaft to flexibly run.

Description

Isolator for starter of hybrid power light automobile

Technical Field

The utility model relates to an auto-parts technical field specifically says an isolator for hybrid light automobile starter.

Background

The one-way clutch is also called a one-way clutch assembly, or a one-way bearing. The automobile starter is also called as an automobile starter. The isolator of automobile starter of prior art is different in structure, and the function is different, be CN 201321935Y like this applicant's grant bulletin number in the utility model discloses an isolator of automobile starter, include the gear shaft as an organic whole with the gear, install the star wheel outside the gear shaft, the star wheel includes major diameter part and path part, the cooperation plays a plurality of rollers and the pressure spring of one-to-one of unidirectional rotation effect in the centre bore of the major diameter part of star wheel, there is the dustcoat outside the terminal surface that the major diameter part is close to the gear, the minor diameter part be with starter integral key shaft matched with spline housing, the integral key shaft generally adopts oblique integral key shaft, the spline housing generally adopts oblique spline housing. When the starter is started, a power supply of a starter electromagnetic valve and a starter motor is switched on, a shifting fork of the starter is inserted into the groove to drive the spline shaft to be meshed with the spline sleeve, the isolator is pushed to enable the gear of the isolator to be meshed with the flywheel gear ring, the motor rotates to drive the engine to rotate, the engine is started after a certain rotating speed is reached, and the shifting fork drives the isolator to be disengaged.

However, the one-way clutch of the automobile starter in the prior art has the following defects: although the inner hole of the spline housing is internally provided with the radial convex ring for axially limiting the spline shaft, rigid friction exists between two end faces, the spline shaft and the spline housing still have the phenomenon of clamping stagnation or even the phenomenon of clamping, flexible operation between the spline shaft and the spline housing is influenced, the spline shaft does not retract quickly when needing to return, or even the spline shaft and the spline housing are difficult to separate, so that the normal operation of the isolator and the starter and the normal starting of an engine are influenced.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is to provide a prevent that the integral key shaft from downthehole jamming of spline housing, make integral key shaft and spline housing meshing and break away from the equal nimble isolator that is used for hybrid light automobile starter.

The technical scheme of the utility model is that, an isolator for a hybrid light automobile starter is provided, which comprises a gear shaft integrated with a gear, a star wheel arranged outside the gear shaft, the star wheel comprises a large-diameter part and a small-diameter part, a plurality of rollers which are matched in a central hole of the large-diameter part of the star wheel and have unidirectional rotation function, and a first pressure spring which is in one-to-one correspondence, an outer cover is arranged outside the large-diameter part, the small-diameter part is a spline housing which is matched with a spline shaft of a driving shaft of the starter, a radial convex ring which is used for limiting the axial direction of the spline shaft is arranged in the hole of the spline housing, one end of the gear shaft close to the gear is provided with a circular hole which is used for the axial direction of the cylindrical shaft of the driving shaft and has sliding fit, a plurality of blind holes with openings facing the spline shaft are arranged in the radial convex ring, a second pressure spring is arranged in each blind hole, the front end of, the press cover is provided with a plurality of through holes which are in one-to-one correspondence with the blind holes and the steel balls, the aperture of each through hole is smaller than the radius of each steel ball, so that the steel balls protrude out of the end face of the press cover, which faces the spline shaft, and the plurality of steel balls and the end face of the spline shaft are in elastic rolling friction.

After the structure above adopting, the utility model discloses an isolator for hybrid light automobile starter has following advantage: the end surface of the spline shaft is elastically rolled and rubbed with the steel balls, so that the phenomenon that the spline shaft and the spline housing are stuck is basically avoided, and the phenomenon that the spline shaft and the spline housing are stuck is further avoided, so that the spline shaft and the spline housing can flexibly run, the spline shaft can rapidly return when needing to return, the spline shaft and the spline housing are flexibly, accurately, stably and reliably engaged and disengaged, namely the spline shaft and the spline housing are flexibly, accurately, stably and reliably matched and run, and the normal running of the isolator and the starter and the normal starting of the engine are powerfully ensured.

Furthermore, the through hole is a conical through hole, one end close to the radial convex ring is a large hole, one end close to the spline shaft is a small hole, and the aperture of the small hole is smaller than the radius of the steel ball so that the steel ball protrudes out of the end face, facing the spline shaft, of the gland. After the structure is adopted, the contact surface of the steel ball and the gland is larger, the matching is more flexible, and the elastic rolling friction effect of the steel ball and the end surface of the spline shaft is better.

Furthermore, the diameter of the steel ball is 3-6 mm, and the height of the steel ball protruding out of the end face, facing the spline, of the gland is 0.5-2 mm. After the structure is adopted, the contact surface between the steel ball and the end face of the spline shaft is larger, and the elastic rolling friction effect between the steel ball and the end face of the spline shaft is better.

Furthermore, the through holes are uniformly distributed along the circumference of the gland. After the structure is adopted, the contact area between the end face of the spline shaft and the steel ball is more uniform, the mechanical property is more ideal, and the elastic rolling friction effect between the steel ball and the end face of the spline shaft is better.

Furthermore, the oil-gas seal device also comprises at least one ventilation oil through hole which is arranged on the radial convex ring and the gland and penetrates through the circular hole and the hole of the spline shaft sleeve. After the structure is adopted, the pressure difference between the hole, namely the cavity, of the spline shaft with the large diameter and the circular hole, namely the circular shaft hole, with the small diameter is skillfully utilized, when the end face of the spline shaft is close to the convex ring direction, gas and oil of the circular hole can enter the hole of the spline shaft sleeve through the air through oil hole, the pressure is balanced, the lubricating effect of the spline shaft is also enhanced, the spline shaft and the spline sleeve are meshed and separated more flexibly, and the normal operation of a one-way clutch and a starter and the normal starting of the engine are further ensured.

Furthermore, the plurality of ventilation oil through holes are circumferentially arranged along the radial convex ring, and the hole diameters of the ventilation oil through holes are different. By adopting the structure, the ventilation and oil passing effects are better.

Drawings

Fig. 1 is a schematic longitudinal sectional structural view of an isolator for a hybrid light vehicle starter according to the present invention.

Fig. 2 is a right-side structural view of the gland in fig. 1.

Fig. 3 is a schematic sectional view a-a of fig. 1.

Fig. 4 is an enlarged schematic view of B in fig. 1.

Shown in the figure: 1. the gear, 2, the gear shaft, 3, the star wheel, 4, the major diameter part, 5, the roller, 6, the dustcoat, 7, the spline housing, 8, radial bulge loop, 9, the oil through hole of ventilating, 10, the circular port, 11, the blind hole, 12, the second pressure spring, 13, the steel ball, 14, the gland, 15, first pressure spring, 16, conical through-hole, 17, macropore, 18, aperture, 19, the hole of spline housing.

Detailed Description

The following describes the present invention with reference to the accompanying drawings. It should be noted that the description of the embodiments is provided to help understanding the present invention, but the present invention is not limited thereto. Furthermore, the technical features mentioned in the embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

As shown in fig. 1, 2, 3, and 4:

the utility model is used for isolator of hybrid light automobile starter, include with 1 gear shaft 2 as an organic whole of gear, install star wheel 3 outside 2 gear shafts. The star wheel 3 includes a large-diameter portion 4 and a small-diameter portion. A plurality of rollers 5 which are matched in the central hole of the large-diameter part 4 of the star wheel 3 and play a role of unidirectional rotation, and first compression springs 15 which are in one-to-one correspondence. The large-diameter part 4 is externally provided with a cover 6. The small diameter part is a spline housing 7 matched with a spline shaft of a driving shaft of the starter, and a hole 19 of the spline housing is generally a bevel spline shaft hole of a bevel spline housing matched with a bevel spline shaft. A radial convex ring 8 for axially limiting the spline shaft is arranged in a hole 19 of the spline sleeve 7. One end of the gear shaft 2 close to the gear 1 is provided with a circular hole 10 which is used for the cylindrical shaft of the spline shaft to axially penetrate and be in sliding fit. The above is the same as the prior art.

The utility model discloses an isolator for hybrid light automobile starter's invention point lies in:

a plurality of blind holes 11 with openings facing the spline shaft are formed in the radial convex ring 8, a second pressure spring 12 is arranged in each blind hole 11, and a steel ball 13 is arranged at the front end of each second pressure spring 12. The end face of the radial convex ring 8 facing the spline shaft is fixed, such as welded or screwed, and then a gland 14 is bonded at the thread part by high-temperature resistant strong glue. The gland 14 is provided with a plurality of through holes which are in one-to-one correspondence with the blind holes 11 and the steel balls 13, the aperture of each through hole is smaller than the radius of each steel ball 13, so that the steel balls 13 protrude out of the end face, facing the spline shaft, of the gland 14, and the steel balls 13 and the end face of the spline shaft are in elastic rolling friction. It will be appreciated that the through-holes have at least two configurations, either straight through holes or circular through-holes, or conical through-holes 16 as described below.

The through hole can be a conical through hole 16, a large hole 17 is arranged at one end close to the radial convex ring, and a small hole 18 is arranged at one end close to the spline. The aperture of the small hole 18 is smaller than the radius of the steel ball 13, so that the steel ball 13 protrudes out of the end face of the gland 14 facing the spline, and similarly, a plurality of steel balls 13 are in elastic rolling friction with the end face of the spline.

The diameter of the steel ball 13 can be 3-6 mm, and the height of the steel ball 13 protruding out of the end face, facing the spline, of the gland 14 can be 0.5-2 mm.

Said through holes, such as conical through holes 16, are evenly distributed along the circumference of the gland 14.

The number of the blind holes 11, the second pressure springs 12, the steel balls 13 and the conical through holes 16 can be 10-15, and the steel balls can be fully distributed along the circumference, namely, the gap between the two steel balls is very small, such as 0.2-05 mm.

The utility model discloses an isolator for hybrid light automobile starter still link up circular port 10 and the hole 19 of integral key shaft promptly the logical oilhole 9 of ventilating of the inner chamber of integral key shaft including establishing at least one on radial bulge loop 8 and gland 14.

The number of the ventilation oil through holes 9 can be multiple, such as 4 and 2, 3, 5, 6 and the like shown in the figure, and the ventilation oil through holes 9 can be arranged along the circumference of the radial convex ring 8, and the hole diameters of the ventilation oil through holes 9 can be different.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (6)

1. The utility model provides a be used for light automobile starter isolator of hybrid, include gear shaft (2) as an organic whole with gear (1), install star wheel (3) outside gear shaft (2), star wheel (3) are including major diameter part (4) and path part, the cooperation plays a plurality of roller (5) and the first pressure spring (15) of one-to-one correspondence of unidirectional rotation effect in the centre bore of major diameter part (4) of star wheel (3), there is dustcoat (6) outside major diameter part (4), path part is spline shaft matched with spline housing (7) with the starter drive shaft, there is radial bulge loop (8) to spline shaft axial spacing in hole (19) of spline housing (7), there is circular port (10) that the cylindrical shaft axial that is used for the drive shaft to go deep into and sliding fit in one end that gear shaft (2) are close to gear (1), its characterized in that: radial bulge loop (8) in have a plurality of openings towards blind hole (11) of integral key shaft, all have a second pressure spring (12) in every blind hole (11), every second pressure spring (12) front end all has a steel ball (13), radial bulge loop (8) are fixed with a gland (14) on the terminal surface of integral key shaft, gland (14) are gone up a plurality ofly and blind hole (11) and steel ball (13) one-to-one's through-hole, the aperture of through-hole is less than the radius of steel ball (13) and makes steel ball (13) protrusion in the terminal surface of gland (14) towards the integral key shaft, many steel ball (13) and the terminal surface elasticity rolling friction of integral key shaft.

2. The starter one-way clutch for hybrid light vehicle according to claim 1, wherein: the through hole is a conical through hole (16), one end close to the radial convex ring (8) is a large hole (17), one end close to the spline shaft is a small hole (18), and the aperture of the small hole (18) is smaller than the radius of the steel ball (13) so that the steel ball (13) protrudes out of the end face, facing the spline shaft, of the gland (14).

3. The starter one-way clutch for hybrid light vehicle according to claim 1 or 2, wherein: the diameter of the steel ball (13) is 3-6 mm, and the height of the steel ball (13) protruding out of the gland (14) towards the end face of the spline is 0.5-2 mm.

4. The starter one-way clutch for hybrid light vehicle according to claim 1 or 2, wherein: the through holes are uniformly distributed along the circumference of the gland (14).

5. The starter one-way clutch for hybrid light vehicle according to claim 1, wherein: and the oil-gas seal also comprises at least one oil ventilation hole (9) which is arranged on the radial convex ring (8) and the gland (14) and penetrates through the circular hole (10) and the hole (19) of the spline shaft sleeve.

6. The starter one-way clutch for hybrid light vehicle according to claim 5, wherein: the plurality of ventilation oil through holes (9) are arranged along the circumference of the radial convex ring (8), and the hole diameters of the ventilation oil through holes (9) are different.

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