Freewheel self-locking differential

FIELD: transport.

SUBSTANCE: invention relates to machine building, specifically to differential gears of wheeled tractor front driving axles, as well as can be used as differential for wheeled vehicles and other transport means. Freewheel self-locking differential represents double-acting coupled ratchet free-wheel clutch installed on bearings in axle body. It contains differential housing with driven gear (3) of central gear group. In the borings of the housing, ratchets (5) and spring-loaded axes (7) with catches (8) installed on them are mounted. The axes have on their each butt end one main eccentric projection (A), interacting with stationary disc (10) installed in axle body, and one additional projection (B) located diametrically opposite to the main projection. In the axle body there is additional disc (12) installed being able to move in axial direction by means of guides (11) and to act on additional projections.

EFFECT: invention has possibility of forced locking differential ratchet mechanisms and switching on front wheels during braking.

5 dwg

 

The invention relates to mechanical engineering, in particular differential gear front axles wheeled tractors, and also can be used as a differential wheeled cars and other vehicles.

Known self-locking differential free running [1]containing the hub of the driven gear and the case in which you installed half-shaft casing, with the end surfaces of the lugs, a sleeve inside the casing on the outer surface of which is made diametrically located slots, in which the tangential clearance posted by shanks dogs, located on the axes and set its ends in the housing parts movably in the axial direction.

The disadvantage of this design is fuzzy triggered dogs at high speeds occurring due to the weak pressing them to the end projections of the half-shafts clips, due to the appearance at high speeds of rotation of the friction forces arising from the centrifugal forces that impede the movement of the axes of the dogs along the axis and the clamping dogs to end stops half-shafts clips. The increase of permanent axial force due to the spring at a small turnover differential leads to an increase in wear as stops half-shaft casing and liners dogs.

Known samolocie the clinical differential free running [2], which is mounted on bearings in the housing of the axle dual ratcheting overrunning clutch double action and includes a housing differential driven gear, the Central gear, the bores of which it is the star wheels, spring-loaded axis available at their ends on one main eccentric protrusion and a pawl, pivotally mounted on the axis and cooperating with a fixed disk installed in the body of the bridge.

A disadvantage of known construction conventional prefilled auto-disable free running differential is the lack of engine braking.

The basis of the proposed technical solutions task transfer braking torque from the main transmission to the front wheels of the vehicle during braking.

The technical result of the implementation of the tasks is the ability to push lock hrapovic mechanisms of differential front axle and turn the front wheels in the braking process. This improves braking performance due to the use of 100% of the towing vehicle weight and safety when braking on steep descents.

The problem is solved in that a limited-slip differential freewheel is a mounted on bearings in the housing mos is and dual ratcheting overrunning clutch double action. The differential includes a housing driven gear, the Central gear, the bores of which it is the star wheels and spring-loaded axis attached to their dogs. The axis are on the ends of one of the main eccentric protrusion that interacts with a fixed disk installed in the body of the bridge, and diametrically oppositely located relative to the main ledge, the additional ledge. In the case of the bridge has an extra disk that has the ability to move in the axial direction with the help of leads and act on additional tabs.

New for this design is that the axis are on the ends of one additional protrusion located diametrically opposite eccentric relative to the main ledge. In the case of the bridge has a drive that has the ability to move in the axial direction with the help of leads and act on additional tabs.

The design of conventional prefilled auto-disable differential freewheel illustrated by the following drawings.

1 shows a limited-slip differential freewheel. Figure 2 shows the operation of the differential mode-locking. Figure 3 shows the section b-b In figure 2. Figure 4 shows the operation of the differential-mode push lock. Figure 5 the image is but the cross-section y-Y figure 4.

A limited-slip differential freewheel is a double overrunning clutch ratcheting double action type, installed in the housing of the axle 1 in the bearings 2. Driven gear 3 is fixed to the clutch housing 4, which has a bore with installed 5 star wheels. The star wheels 5 are grooves on the outer surfaces and connected to the axes 6 of the front wheels. The shaft 7 mounted in the bores of the housing of the clutch 4 and have at their ends the main "A" and an additional "B" tabs eccentric and diametrically opposed relative to each other. On the axes 7 installed dogs 8 stops swinging together with the axis 7. Spring 9 constantly press axis 7 main eccentric projections "A" to the stationary disk 10 attached to the housing 1. In the bores of the housing of the axle 1 set leashes 11, which can move in the axial direction together with attached to them by the disk 12 and, by means of springs 13, press the disc 12 to the stationary disk 10.

The proposed design solution allows you to use the differential in two modes: mode-locking and forced the lock.

Mode-locking of a driven gear 3 to the clutch housing 4 rotates relative to the housing of the axle 1. Due to the friction force of the main eccentric protrusions "And" about fixed on the IC 10, the shaft 7 rotates together with dogs 8. When this stops dogs 8 come into the outer grooves of the star wheels 5 one side or the other, depending on the direction of rotation of the clutch housing 4.

In this case, if the angular velocity of rotation ω1driven gear 3 to the clutch housing 4 more speed ω2the star wheels 5 lugs dogs 8 are in the outer grooves of the star wheels 5 and rest on their ledges (Figure 3). Thus the 5 star wheels are blocked and transmit torque from the driven gear 3 through the axis 6 on the driving wheels.

If the angular velocity of rotation ω1driven gear 3 to the clutch housing 4 is less than the rotation speed ω2the star wheels 5, the tabs on the star wheels 5 is pushed from the exterior grooves stops dogs 8. While the star wheels 5 axes 6 are able to rotate freely relative to the driven gear 3.

In the forced mode locking when braking moves in the axial direction of leads 11 and the compression springs 13. As a result, the disk 12 mounted on the leads 11, also moves in the axial direction and presses the extra tabs "B". In this case the axis 7, compressing the spring 9, the sink in the bore of the clutch housing 4, and the main tabs "And" depart from the fixed disk 10. In the absence of contact of the main tabs "And" fixed disk 10, and actions with the crystals of friction between the extra tabs "B" and the disk 12, axis 7 with dogs 8 are rotated in the opposite direction and enter stops dogs 8 in the outer grooves of the star wheels 5.

In this case, if the angular velocity of rotation ω2the star wheels 5 more angular speed ω1driven gear 3 to the clutch housing 4, the tabs on the star wheels 5 influence stops dogs 8, 5 star wheels are blocked and transmit the braking torque from the driven gear 3 to the clutch housing 4 on the axis 6, which leads to braking of the front wheels (Figure 5).

Thus, when force-locking differential is hard kinematic relationship of the axes 6 with the Central transmission that allows you to use the front wheels when braking the engine.

The control mechanism forced locking differential interlocked with the mechanism of the brake control of the vehicle and may be mechanical, hydraulic, electrical, etc.

Sources of information

1. SU, No. 479670, IPC WC 17/20, publ. 03.08.1975. (No. 29).

2. Manual 310, 320, "Minsk tractor plant", 1998 (Prototype).

A limited-slip differential freewheel, which is mounted on bearings in the housing of the axle dual ratcheting overrunning clutch double action and includes a housing differential driven gear hub transport in plants is the customs which has the star wheels, pawl, pivotally mounted on the spring axis, having at their ends on one main eccentric protrusion that interacts with a fixed disk, characterized in that at the ends of the axes diametrically opposite the respective main eccentric projections made additional tabs, and in the case of the bridge has an extra disc with leashes, with which he can move in the axial direction and to influence additional tabs.



 

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FIELD: transport.

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1 dwg

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1 dwg

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1 dwg

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