CN213298738U - Electronic locking structure of differential mechanism - Google Patents

Abstract

The utility model provides an electronic locking structure of a differential mechanism, which comprises a differential mechanism shell, a transmission gear set is arranged in the differential mechanism shell, the transmission gear set comprises a planetary gear set and a half axle gear meshed with the planetary gear set, a lock ring and an end cover are sequentially arranged on one side of the half axle gear, which is far away from the tooth surface, the locking device comprises a cam disc and an electromagnet, wherein a V-shaped groove is formed in one side, facing a locking ring, of the cam disc, a guide post penetrates through one end of an end cover to be in contact with the surface of the V-shaped groove, the other end of the guide post abuts against the end face of the locking ring, a plurality of locking teeth extending along the axial direction are circumferentially arranged at one end of a half shaft gear, a plurality of locking lugs are circumferentially arranged on the inner wall of the locking ring and correspond to the locking teeth, a limiting ring is coaxially arranged on the half shaft gear, the limiting ring is located at one end, close to a tooth surface, of each. The utility model provides a locking is quick, stable, locking simple structure, the effectual differential mechanism electron locking structure of locking.

Description

Electronic locking structure of differential mechanism

Technical Field

The utility model relates to a differential mechanism locking technical field, in particular to differential mechanism electron locking structure.

Background

The automobile differential is a main component for driving the car. The function of the device is to allow the half shafts on the two sides to rotate at different rotating speeds while transmitting power to the half shafts on the two sides, so that the wheels on the two sides can run in an unequal distance manner in a pure rolling manner as far as possible, and the friction between the tire and the ground is reduced. The common differential mechanism can allow the left wheel and the right wheel to rotate at different speeds, but when one wheel spins, the other wheel on a good road surface can not obtain torque, and the automobile loses the driving power. To avoid this, if the two wheels are connected, the power can be transmitted to at least the other wheel, so that the vehicle can obtain the driving power to get rid of the trouble, and therefore, the differential needs to be provided with various differential locking mechanisms.

The prior publication No. CN206221605U, entitled "an electrically controlled locking differential lock and differential", discloses a differential lock device comprising a differential lock housing fixed on one side of the differential lock in the axial direction, a side gear in the differential lock housing near one side extends outward to form an extension end with external splines or external gears, the extension end is provided with a connecting ring with an internal spline or an internal gear, a locking ring is arranged between the connecting ring and the half axle gear, the opposite ends of the locking ring and the connecting ring are respectively formed with a spline capable of being connected with each other or teeth capable of being meshed with each other, the locking ring is provided with a resetting device enabling the locking ring to tend to be away from the connecting ring, a plurality of bulges of the locking ring penetrate through the rotation limiting hole and are fixedly connected with a magnetic sheet, one end, away from the differential, of the magnetic sheet is provided with an electromagnetic device, the electromagnetic device is opened and adsorbs the magnetic sheet, the magnetic sheet drives the locking ring to move. However, when the differential rotates, the torque is large, the magnetic force is the magnetic attraction force of the axial direction to the locking ring, and the blocking effect of the rotating force of the locking ring along with the rotation of the shell is not large, so that the locking force provided by the form of the magnetic force to the locking ring is insufficient, and the locking structure is unstable.

Therefore, a differential electronic locking structure which is rapid and stable in locking, simple in locking structure and good in locking effect needs to be designed.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a locking is quick, stable, locking simple structure, the effectual differential mechanism electron locking structure of locking.

The above technical purpose of the present invention can be achieved by the following technical solutions: an electronic locking structure of a differential mechanism comprises a differential mechanism shell, a transmission gear set is arranged in the differential mechanism shell, the transmission gear set comprises a planetary gear set and a half axle gear meshed with the planetary gear set, a lock ring, an end cover, a cam disc and an electromagnet are sequentially arranged on one side of the half axle gear, which is far away from a tooth surface, one side of the cam disc, which faces the lock ring, is provided with a plurality of V-shaped grooves which are circumferentially arranged, one end of a guide post, which penetrates through the end cover, is in contact with the surfaces of the V-shaped grooves, the other end of the guide post is abutted against the end face of the lock ring, one end of the side gear, which is far away from the tooth surface, is circumferentially provided with a plurality of locking teeth extending along the axial direction, a plurality of locking lugs are arranged on the inner wall of the locking ring along the circumferential direction corresponding to the locking teeth, a limit ring is coaxially arranged on the half axle gear, the limiting ring is located at one end, close to the tooth surface, of the locking tooth, and the axial distance from the end, far away from the tooth surface, of the half axle gear to the limiting ring is smaller than the axial distance of the V-shaped groove.

By adopting the technical scheme, when the electromagnet is not electrified, the half axle gear, the lock ring, the cam disc and the guide column rotate in the same body at the same differential speed; when the electromagnet is powered on, the electromagnet has magnetic force to suck the cam disc and brake the cam disc to make it rotate relatively to the differential case, so that the guide post and the cam disc have relative motion, the guide post makes axial motion under the action of the inclined plane of the cam disc to push the locking ring to overcome the action of wave spring and engage with the matching teeth on the half axle gear to make the half axle gear and the differential case connected into one body, and the power is directly transmitted to the half axle gear through the differential case to achieve the locking effect, and the cam disc and guide post structure is adopted to form the self working condition of the differential mechanism, and the rotation action of the cam disc is combined with the V-shaped groove on the cam disc to form the cam-guide post structure, compared with the axial magnetic force action, the guide post is a specific guide post with a fixed structure, the structure is more stable, the locking action is quicker, and the distance from the outer edge of the half axle, when the axial movement of the lock ring is limited by the limiting ring on the half-axle gear, the guide post is still on the inclined plane of the V-shaped groove of the cam at the moment, the cam is limited not to rotate relative to the shell any more, at the moment, the electromagnet gives a constant reverse braking torque to the cam through suction force, so that the cam disc is in a stable state, the end face of the electromagnet and the end face of the cam are in a static sliding friction state under the action of electromagnetic force, the further locking and fixing effect of the cam disc is realized, and the locking stability of the locking structure.

As a further setting of the utility model, a wave spring is also arranged between the half axle gear and the locking ring.

Through adopting above-mentioned technical scheme, when the electro-magnet outage, under the ripple spring effect, the catch breaks away from the meshing with the side gear, and the guide post falls into cam inclined plane bottom, resumes not locking state, realizes locking structure's reset effect, design benefit.

As the utility model discloses a further setting, the locking lug corresponds with the locking tooth of differential side gear and sets up the contact surface and be outer convex rounding off curved surface, the locking tooth corresponds with the locking lug and sets up the contact surface and be interior convex rounding off curved surface.

By adopting the technical scheme, the surface of the locking lug contacted with the locking teeth at the bottom of the half axle gear is an outer convex smooth curved surface, the surface of the locking teeth contacted with the locking lug is an inner convex smooth curved surface, when the electromagnet is electrified to realize the locking function, the locking ring is axially close to the half axle gear under the pushing of the guide post, the locking lug of the locking ring needs to be matched and meshed with the locking teeth of the half axle gear, but can not be meshed smoothly at once in the process, but the half axle gear and the locking ring are inevitably subjected to meshing within a period of time due to differential speed, the body of the locking lug of the locking ring supports and blocks the splines of the half axle gear to realize the locking of the half axle gear, in the process, the surface of the locking lug contacted with the locking teeth is designed to be large in contact area of the outer-inner convex smooth blocking, and the locking lug and the half axle gear can be explored and adjusted mutually, carry out certain buffering to the catch, along with the final realization of the removal of guide post blocks the effect and the locking through each other of locking lug body and locking tooth body, prevents that catch locking lug and locking tooth from being blockked each other, the scratch even the condition that radial movement can't be smoothly locked for having the edges and corners.

As a further setting of the utility model, catch outer wall circumference is provided with a plurality of convex key, the axial length of catch axial length and catch along the convex key is the same.

Through adopting above-mentioned technical scheme, the more be convenient for machine-shaping when making the catch, the catch space utilization of this kind of structure is lower, is favorable to improving differential mechanism's integration.

As the utility model discloses a further setting, the direction of the flank of tooth is kept away from along half axle gear, and electro-magnet one side is still fixed retaining ring and the circlip of being provided with of joint.

Through adopting above-mentioned technical scheme, can improve the connection stability of electro-magnet on the end cover through with retaining ring and spring collar joint in the electro-magnet.

As a further setting of the utility model, the interval of locking lug is greater than the interval of locking tooth.

Through adopting above-mentioned technical scheme, when holding the locking tightly, as long as some locking lugs can with the locking tooth fixed can, reduce the degree of difficulty of locking, improve the locking speed of device.

As a further setting of the utility model, the electromagnet is connected with the external power supply.

Through adopting above-mentioned technical scheme, the electro-magnet that sets up external power source compares to set up and is better at the inside power supply stability of differential mechanism, more practices thrift the space to also derive from car self battery, the practicality is strong.

The utility model has the advantages that:

1. the utility model discloses a structure of cam disc, guide post, structure differential's self operating mode, the rotatory effect that utilizes the cam disc combines the V-arrangement groove on the cam disc to form cam-guide post structure, compares axial magnetic force effect, and the guide post is specific, has fixed knot to construct the guide post, and the structure is more stable to the locking action is rapider.

2. The utility model discloses the distance of differential side gear outer fringe to spacing collar is less than the perpendicular distance in V-arrangement groove, catch axial motion is when spacing collar is spacing on by differential side gear, the guide post is still on the inclined plane in cam V-arrangement groove this moment, it no longer rotates to have restricted the relative casing of cam, at this moment, the electro-magnet gives a invariable reverse braking moment of torsion of cam through suction, make the cam disc be in the stable state, electro-magnet terminal surface and cam terminal surface are under the effect of electromagnetic force, be in the static sliding friction state, realize the further locking fixed action of cam disc, further improve the locking stability of locking structure.

3. The utility model discloses still be provided with and still be provided with wave spring between side gear and catch, when the electro-magnet outage, under the ripple spring effect, catch and side gear break away from the meshing, the guide post falls into cam inclined plane bottom, resumes not locking state, realizes the reset action of locking structure, design benefit.

4. The utility model discloses a catch inboard is provided with a plurality of locking lug, the surface that the locking lug contacted with the locking tooth of half shaft gear's bottom is outer convex rounding off surface, the surface that locking tooth and locking lug contacted is interior convex rounding off surface, when the electro-magnet circular telegram realized the locking function in-process, the catch is close to half shaft gear under the promotion of guide post axially, the locking lug of catch need with half shaft gear's locking tooth cooperation meshing, but in this process can not just mesh smoothly at once, but because half shaft gear and catch have the differential, must mesh in a period of time, the body of the locking lug of catch keeps off half shaft gear's tooth's key each other, realize the locking of locking half shaft gear's locking tightly, in this process, the surface that locking lug and locking tooth contacted is designed to be outer-interior convex rounding off the area is big, and can explore the in-process of adjustment each other at catch and side gear, carry out certain buffering to the catch, along with the removal of guide post finally realizes blocking each other through locking lug body and locking tooth body and locking, prevent that catch locking lug and locking tooth from being blockked each other for having the edges and corners, the scratch even the unable smooth locking condition of radial movement appears.

5. The utility model discloses an axial length of the convex key on the outer wall of catch is the same with the axial length of catch, the more machine-shaping of being convenient for when making the catch, and the catch space utilization of this kind of structure is lower, is favorable to improving integrating of differential mechanism.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

Fig. 1 is an external structural view of the differential.

Fig. 2 is an exploded view of the differential.

Fig. 3 is a schematic structural diagram of the electronic locking structure of the differential mechanism of the present invention.

Fig. 4 is a schematic diagram of a local explosion structure of the electronic locking structure of the differential mechanism of the present invention.

In the figure, 1, a differential case, 2, a transmission gear set, 3, a planetary gear set, 4, a half shaft gear, 5, a locking ring, 51, a guide post, 6, an end cover, 7, a cam disc, 8, an electromagnet, 9, a V-shaped groove, 10, a locking tooth, 11, a locking lug, 12, a limiting ring, 13, a wave spring, 14, an outer convex smooth curved surface, 15, an inner convex smooth curved surface, 16, a convex key, 17, a retaining ring, 18 and a spring retaining ring.

Detailed Description

The technical solution of the present invention will be clearly and completely described below with reference to the specific embodiments. It is obvious that the described embodiments are only some of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.

Referring to fig. 1-4, an electronic locking structure for a differential, comprising a differential case 1, a transmission gear set 2 disposed in the differential case 1, the transmission gear set 2 including a planetary gear set 3 and a half axle gear 4 engaged with the planetary gear set 3, a locking ring 5, an end cover 6, a cam plate 7 and an electromagnet 8 sequentially disposed on one side of the half axle gear 4 away from a tooth surface, a plurality of circumferentially disposed V-shaped grooves 9 disposed on one side of the cam plate 7 facing the locking ring 5, a guide post 51 penetrating through one end of the end cover 6 and contacting with the surface of the V-shaped groove 9, the other end abutting against an end surface of the locking ring 5, a plurality of axially extending locking teeth 10 disposed on one end of the half axle gear 4 away from the tooth surface, a plurality of locking lugs 11 disposed on an inner wall of the locking ring 5 circumferentially corresponding to the locking teeth 10, wherein the spacing between the locking lugs, the half shaft gear 4 is coaxially provided with a limiting ring 12, the limiting ring 12 is positioned at one end of the locking tooth 10 close to the tooth surface, the axial distance from the end part of the half shaft gear 4 far away from the tooth surface to the limiting ring 12 is smaller than the axial distance of the V-shaped groove 9, a wave spring 13 is further arranged between the half shaft gear 4 and the locking ring 5, and the electromagnet 8 is connected with an external power supply in an electrified way.

Specifically, the contact surface of the locking projection 11 corresponding to the locking tooth 10 of the side gear 4 is an outward convex smooth curved surface 14, and the contact surface of the locking tooth 10 corresponding to the locking projection 11 is an inward convex smooth curved surface 15. The outer wall of the locking ring 5 is circumferentially provided with a plurality of convex keys 16, and the axial length of the convex keys 16 along the locking ring 5 is the same as that of the locking ring 5.

Specifically, a retaining ring 17 and a spring retaining ring 18 are fixedly clamped on one side of the electromagnet 8 along the direction of the side gear 4 away from the tooth surface.

It should be understood that: the planetary gear set 3 is a planetary gear set 3 which can be meshed with a side gear 4 to realize transmission in any differential mechanism in the prior art, and the cam disc 7 is a cam disc 7 with V-shaped grooves 9 on the surface to form a cam structure.

The working principle is as follows: when the electromagnet 8 is not electrified, the side gear 4, the lock ring 5, the cam disc 7 and the guide post 51 rotate in the same body at the same differential speed; when the electromagnet 8 is electrified, the electromagnet 8 has magnetic force to suck the cam disc 7, the cam disc 7 is braked to rotate relative to the differential case, so that the guide post 51 and the cam disc 7 have relative motion, the guide post 51 axially moves under the action of the inclined surface of the cam disc 7 to push the lock ring 5 to overcome the acting force of the wave spring 13 to be meshed with the matching teeth on the half-shaft gear 4, so that the half-shaft gear 4 and the differential case 1 are integrated, power is directly transmitted to the half-shaft gear 4 through the differential case 1 to achieve the locking effect, the structure of the cam disc 7 and the guide post 51 is adopted, the self working condition of the differential is structured, the rotation action of the cam disc 7 is combined with the V-shaped groove 9 on the cam disc 7 to form a cam-guide post 51 structure, and compared with the axial magnetic force action, the guide post 51 is a specific guide post 51 with a fixed structure, so, and the locking action is quicker, the distance from the outer edge of the side gear 4 to the limiting ring 12 is smaller than the vertical distance of the V-shaped groove 9, when the axial movement of the locking ring 5 is limited by the limiting ring 12 on the side gear 4, the guide post 51 is still on the inclined surface of the V-shaped groove 9 of the cam at the moment, the cam is limited not to rotate relative to the shell any more, at the moment, the electromagnet 8 gives a constant reverse braking torque to the cam through suction force, so that the cam disc 7 is in a stable state, the end surface of the electromagnet 8 and the end surface of the cam are in a static sliding friction state under the action of electromagnetic force, the further locking and fixing action of the cam disc 7 is.

It is right above the utility model provides a novel steel wire alignment device has carried out detailed introduction. The principles and embodiments of the present invention have been explained herein using specific embodiments, which are merely used to help understand the method and its core ideas of the present invention. It should be noted that, for those skilled in the art, without departing from the principle of the present invention, the present invention can be further modified and modified, and such modifications and modifications also fall within the protection scope of the appended claims.

Claims (7)

1. The utility model provides a differential mechanism electronic locking structure, its characterized in that, includes differential mechanism casing (1), and drive gear group (2) set up in differential mechanism casing (1), drive gear group (2) include planetary gear set (3) and with planetary gear set (3) meshing half shaft gear (4), one side that the flank of tooth was kept away from in half shaft gear (4) has set gradually catch (5), end cover (6), cam disc (7) and electro-magnet (8), one side that cam disc (7) were kept away from flank of tooth is provided with V-arrangement groove (9) that a plurality of circumference set up, and guide post (51) run through end cover (6) one end and V-arrangement groove (9) surface and contact, and the other end offsets with catch (5) terminal surface, the one end circumference that the flank of tooth was kept away from in half shaft gear (4) is provided with a plurality of along axially extending's locking tooth (10), circumference and locking tooth (10) correspondence are provided with a plurality of locking lug (11) on the The axial-direction locking mechanism comprises a half-axle gear (4), a limiting ring (12) is coaxially arranged on the half-axle gear (4), the limiting ring (12) is located at one end, close to a tooth surface, of a locking tooth (10), and the axial distance from the end, far away from the tooth surface, of the half-axle gear (4) to the limiting ring (12) is smaller than the distance in the axial direction of a V-shaped groove (9).

2. The electronic locking structure of differential mechanism according to claim 1, wherein: a wave spring (13) is also arranged between the side gear (4) and the locking ring (5).

3. The electronic locking structure of differential mechanism according to claim 1, wherein: the locking convex block (11) and the locking tooth (10) of the half axle gear (4) are correspondingly provided with contact surfaces which are convex smooth curved surfaces (14), and the locking tooth (10) and the locking convex block (11) are correspondingly provided with contact surfaces which are convex smooth curved surfaces (15).

4. The electronic locking structure of differential mechanism according to claim 1, wherein: the outer wall of the locking ring (5) is circumferentially provided with a plurality of convex keys (16), and the axial length of each convex key (16) along the locking ring (5) is the same as that of the locking ring (5).

5. The electronic locking structure of differential mechanism according to claim 1, wherein: and a retainer ring (17) and a spring retainer ring (18) are fixedly clamped on one side of the electromagnet (8) along the direction of the half axle gear (4) far away from the tooth surface.

6. The electronic locking structure of differential mechanism according to claim 1, wherein: the distance between the locking lugs (11) is greater than the distance between the locking teeth (10).

7. The electronic locking structure of differential mechanism according to claim 1, wherein: the electromagnet (8) is connected with an external power supply in an electrified way.

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