CN2198455Y

CN2198455Y - Tooth engaged free wheel differential

Info

Publication number: CN2198455Y
Application number: CN 94211446
Authority: CN
Inventors: 任运兴; 孟宏信
Original assignee: MENGJING COUNTY SENSOR PRODUCTION FACTORY
Current assignee: MENGJING COUNTY SENSOR PRODUCTION FACTORY
Priority date: 1994-05-13
Filing date: 1994-05-13
Publication date: 1995-05-24
Anticipated expiration: 2004-05-13

Abstract

The utility model relates to a tooth engaged free wheel differential. It is mainly that the end face teeth of a circular ring are engaged with the following rings at both sides and the engagement cover is provided with two-cycle gear set, wherein, the main engagement set is reverse ladder structure teeth and the subsidiary engagement set is ladder type teeth. If a differential speed running behavior occurs, the following ring at one side has a tendency of rotating fast and the ladder type teeth covers are mutually contacted and generate axial component force to compel the axle of the following ring to move out and the reverse ladder type teeth to demesh, therefore, the reallocation of the driving torque is auto-completed. The utility model has the advantages of reliable transmission, big latching coefficiency, little noise and high service life, and is acceptable for various series of wheeled driven automobile with various complex behavior running to realize the differential speed between the wheels and the bridges.

Description

Tooth engaged free wheel differential

The utility model belongs to the differential mechanism on the wheeled vehicle ransaxle, mainly proposes a kind of dental formula differential.

The following a few class differential mechanisms of the normal employing of prior art both at home and abroad, (1) uses bevel planet gear or planet cylindrical gears differential mechanism, this differential design complexity, technology difficulty is big, the engaging tooth relative sliding velocity is easy to wear greatly, life-span is low, particularly when the vehicle one side drive wheel car load forfeiture driving force of skidding then.(2), in garden bevel differential mechanism, increase friction plate or cam slide mechanism realizes the limited slip differential of automatic locking, though improved the lock ratio of transmission, still have above-mentioned shortcoming.

The purpose of this utility model is, designs a kind of features simple structure, and the differential drive locking is reliable, and in addition the part high differential mechanism of little life-span that weares and teares particularly can adapt to complicated driving operating mode, and the distribution of both sides driving torque when finishing differential automatically improves train operation performance.

The utility model is realized above-mentioned purpose by the following technical solutions, and differential mechanism connects the former vehicle trunnion journal size of employing outward, and interior connection cooperates with former vehicle output Formation of Axle Shaft Spline, therefore exchanges with ransaxle differential mechanism installation commonly used at present.Internal mechanism adopts the driven torus end face tooth engagement that initiatively encircles on end face tooth and the left and right half gear, and Surface of action has two circle teeth, and main engagement is paid and is down stepped tooth, the big reliable transmission of this engagement system lock ratio.Be the main transmission that moment of torsion is carried, it is stepped tooth that secondary engagement is paid, when two side wheel differential moments, secondary engagement is paid flank of tooth contact and is produced end thrust, force driven torus to break away from main engagement, establish the check ring resetting-mechanism between differential gear and the driven torus, resetting-mechanism promotion driven torus axially resets when two side wheel differentials finish, and the both sides driven torus all enters main engagement.

Be the novel embodiment of this shirt below.

Fig. 1 differential design schematic representation.

Fig. 2 hat tooth back-up ring parts drawing.

Fig. 3 initiatively encircles restriction center ring circular movement schematic representation.

Fig. 4 eliminates the noise and encircles and driven torus rigging position figure.

Fig. 5 initiatively encircles restriction noise elimination ring circular movement schematic representation.

Fig. 6 center ring and driven torus produce the end thrust schematic representation.

Fig. 7 driven torus is axial mobile schematic representation under the end thrust effect.

Fig. 8 driven torus separated state schematic representation.

In conjunction with the accompanying drawings the utility model is further specified.Initiatively encircling 3 is ring-shaped work piecess, the uniform stepped tooth of both sides end face, and the gear tip clearance of stepped tooth is apart from being not less than tooth top width.Initiatively encircle 3 inner cylindrical surface embedding center ring 6, center ring 6 is done small amount of circumferential motion and is seen Fig. 3 under the restriction that initiatively encircles 3 teeth fond of gossip, and by snap ring 5 will initiatively encircle 3 and center ring 6 connect firmly and be integral, the uniform stepped tooth of both sides end face of center ring 6, the stepped tooth tooth depth is greater than falling the tooth depth of stepped tooth.Initiatively encircle vertical uniform four straight pins on 3 the external cylindrical surface, be the cross axle shape, be held between left differential carrier 1 and the right differential carrier 2,, accept driving torque along with differential carrier rotates together by bolt clip.Initiatively encircle 3 and the left and right sides of center ring 6 driven torus 4 is set respectively, the all teeth of uniform two circles of an end face of driven torus 4, outer ring week tooth is down stepped tooth, with the end face tooth engagement that initiatively encircles 3, the all teeth of inner ring are stepped tooths, the trapezoidal tooth rim of inner ring that the ring 11 of eliminating the noise embeds driven torus 4 is seen Fig. 4, and under the restriction that initiatively encircles tooth fond of gossip, do the small amount of circumferential motion and see Fig. 5, the tooth top of noise elimination ring 11 is than the low 0.2～0.4mm of the trapezoidal tooth top of the inner ring of driven torus 4, and the profile of tooth that their form is identical with the contrate tooth profile of center ring 6.Initiatively encircle 3, the central axis of center ring 6 and driven torus 4 and the external tooth clearance meshing of differential gear 10, inner ring semiaxis 13 deads in line of differential gear 10.The external tooth clearance meshing of the internal tooth of driven torus 4 and differential gear 10, the interior circle of differential gear 10 and semiaxis 13 splined.In order to make driven torus 4 generations rely on the axial force of active ring and center ring all the time, between differential gear 10 and driven torus 4, the check ring resetting-mechanism is set, 7 axial weeks of stage clip are arranged in differential gear 10 bodies, the one end is pushed down hat tooth back-up ring 9, produce axial force, hat tooth back-up ring is seen Fig. 2, and its marginal tooth snaps in the driven torus 4, and inner edge can promote driven torus and move axially along the guiding tooth on the differential gear (differential gear external tooth) under the effect of stage clip.Packing ring 12 is the axial adjusting washer (disk)s of differential gear, and lining 8 is between the semiaxis of the left and right sides, the neck bush of differential gear.

The working principle of this differential mechanism of brief description.Vehicle straight line cruising, two side wheels do not have differential, and initiatively ring is paid trapezoidal gear by main engagement power is delivered to left and right driven torus successively, differential gear and semiaxis, secondary engagement is paid the trapezoidal flank of tooth and is not contacted, and the locking of falling the stepped tooth is reliable, and moments such as left and right wheels drive.An automobile turning or a side be unsettled, skid, run into obstacle when two side wheel differentials take place, have 4 moments of the then right driven torus of trend (may be that revolver is taken turns faster than the right side equally) of rotating faster than revolver that rotation trend faster than center ring 6 is arranged such as right side wheel, the trapezoidal all teeth of right driven torus inner ring contact generation axial thrust load F with the trapezoidal flank of tooth of center ring ₁See Fig. 6, pressure spring 7, the axially outer (see figure 7) of moving of right driven torus, the disengaging of falling stepped tooth engagement is paid in main engagement, the trapezoidal all teeth of driven torus inner ring this moment are positioned at the tooth top of the ring 11 of eliminating the noise, with center ring 6 stepped tooth top part engagement (see figure 8)s, only transmit the fraction moment of torsion, avoided whole gear tooth friction to skid like this, reduced noise and improved the flank of tooth life-span, disappeared when automobile recovers the cruising differential, then the stepped tooth emaciated face is from contact, stage clip 7 promotes right driven torus and resets, the left and right engagement of falling stepped tooth locking, and left and right driving moment is divided equally.

The external size of this dental formula differential is identical with existing differential mechanism, can exchange installation, is applicable to the wheeled driving vehicle of various series, realizes differential between wheel, between bridge, is particularly suitable for the vehicle of driving cycle complexity.Have following advantage: (1) reliable transmission, lock ratio is big, and tractive force improves 54% than open differential; (2) noise is little; (3) the abrasion life-span that reduces whole tooth improves greatly; (4) improved road holding, if vehicle one side wheel is unsettled, the vehicle that skids still can pass through, if a side is met obstacle, then this side drive power increases and still can pass through, if side semiaxis fracture, opposite side still normally the locking driving travel.

Claims

1, a kind of dental formula differential, the outer connection adopted former vehicle trunnion journal size, be clamped between the differential carrier of the left and right sides with bolt, the interior connection with former vehicle output Formation of Axle Shaft Spline cooperates, with existing differential mechanism exchange is installed, it is characterized in that, the differential mechanism internal structure mainly comprises: initiatively encircle 3, the uniform stepped tooth of its both sides end face, center ring 6, the uniform stepped tooth of its both sides end face, center ring 6 is fixed on by snap ring 5 and initiatively encircles in 3 the interior garden cylinder, under the restriction that initiatively encircles 3 teeth fond of gossip, rotatablely move on a small quantity, initiatively encircle 3 and the left and right sides of center ring 6 be provided with can axial displacement driven torus 4, driven torus 4 has an end face uniform two all teeth, outer ring week tooth is down stepped tooth, the all teeth of inner ring are stepped tooths, respectively with initiatively encircle 3 and the engagement of the end face tooth of center ring 6, the external tooth clearance meshing of the internal tooth of driven torus 4 and differential gear 10, the endoporus of differential gear 10 and semiaxis 13 splined, initiatively encircle 3, center ring 6, the shaft axis of driven torus 4 and differential gear 10 and semiaxis 13 deads in line, an axial week be provided with stage clip 7 in differential gear 10 bodies, hat tooth back-up ring 9 is enclosed within on the differential gear 10, and its marginal tooth guarantees that it snaps in the driven torus 4 smoothly, and inner edge can promote driven torus 4 under the effect of stage clip 7 be that the differential gear external tooth moves axially along the guiding tooth on the differential gear.

2, dental formula differential according to claim 1, it is characterized in that, the trapezoidal tooth rim of driven torus 4 is embedded with the ring 11 of eliminating the noise, eliminate the noise ring 11 under the restriction that initiatively encircles tooth fond of gossip, make circular movement in a small amount with respect to driven torus 4, the profile of tooth that they form is identical with the end face stepped tooth of center ring 6, and the tooth depth of the ring 11 of eliminating the noise is lower than the tooth depth of driven torus 4.

3, dental formula differential according to claim 1 is characterized in that, the stepped tooth tooth depth of driven torus 4 and center ring 6 is all greater than driven torus 4 and the tooth depth of falling the stepped tooth of initiatively encircling 3.

4, dental formula differential according to claim 1 is characterized in that, initiatively encircle 3 and driven torus 4 fall stepped tooth, gear tip clearance is apart from the tooth top width that is not less than it.