RU188501U1 - Activation mechanism with an eccentric washer for locking the differential of the main transmission of the wheeled ATV - Google Patents

Abstract

The invention relates to the mechanisms for converting rotational motion into reciprocating. A device for converting a rotary motion into a reciprocating motion comprises an eccentric having a cylindrical shape and serving to transmit a reciprocating motion to a fork of the main gear differential by moving along a specially machined slot. EFFECT: exclusion of the mechanism jamming mechanism using an eccentric, as well as the implementation of the differential lock in any conditions, excluding accidental shutdown and activation of the locking mechanism, ensuring simplicity of the design. Also, the installation of an engagement mechanism with an eccentric washer to block the differential of the main transmission of the wheeled ATV allows three modes of operation of the main gear to be realized (the main gear is off, the main gear is connected, the differential lock on the connected bridge), and also will increase the reliability of data switching, eliminating the possibility of mechanism jamming . The switching mechanism with an eccentric washer for locking the differential of the main gear contains an electric motor rigidly connected to the eccentric washer, an eccentric washer, a shift fork having a groove for the eccentric movement, the fork axis prohibiting its movement, except for translational, a bridge coupling connecting the account of the presence of two splined rims: the disabled bridge at the conditional zero angle of rotation of the eccentric washer in the initial position; the connected bridge when turning the eccentric washer by 90 ° with the engagement of only small splines and the connected bridge when the differential is locked while rotating the eccentric washer by 180 ° with the engagement of both splined rims. 3 il.

Description

Technical field

The invention relates to the mechanisms for converting rotational motion into reciprocating. A device for converting a rotary motion into a reciprocating motion comprises an eccentric having a cylindrical shape and serving to transmit a reciprocating motion to a fork of the main gear differential by moving along a specially machined slot.

The level of technology

At the Internet address https://fomm.cayservice.ru/showthread.php?t=3051 there is relevant information about locking differentials on the example of a Porsche Cayenne, which is serially equipped with a lockable center differential with electric drive and reduction gear. All elements are built into the transfer case. When the planetary gear is switched on, the electric motor turns the eccentric. On the eccentric there is an internal path along which the stem of the rod moves with the shift fork. The switching fork is connected to the sliding clutch. The inner part of the sliding clutch is a drive gear internal gears of the planetary gear, which engages with the satellites. The center differential is locked by means of a multi-plate friction clutch driven by an electric motor. The electric motor turns the eccentric, which presses the pressure plate through the lever. This disk, in turn, compresses the package of slats. A planetary gearbox with reduction gearing is also connected to the electric motor. When driving off-road (approx .: analogue of a wheeled motor-all-terrain vehicle) it is recommended to block the center differential by 100% using a switch. Differential locks are included depending on driving conditions. The effect of locks is determined, for example, by the rotational speed and load of the engine, the angle of rotation of the steered wheels, the position of the accelerator pedal and the speed of the wheels. In accordance with these parameters, the axial pressure is controlled by an electromechanical drive on a multi-plate friction clutch, which ensures the transmission of the torques calculated by the control unit in the required ratio.

The disadvantage is the lack of rigid blocking (as a spline connection) associated with the use of friction elements, the need for constant regulation of the pressing force on the friction clutches, which leads to a significant complexity of the design, the use of additional sensors, reducing maintainability and reliability of the design. On cars Porsche Cayenne according to statistics often failed electronic clutch differential lock.

The limiting device for all-terrain vehicle differential is known (see US Pat. No. 6,655,086 (Differential limiting apparatus for all terrain vehicle), published February 24, 2004), which contains a control lever that actuates a restrictive mechanism made in the form of an eccentric washer, the eccentric of which moves in a special slot in the differential coupling.

The disadvantage of this design is the presence of only one point of application of force to the clutch of the differential, which can lead to jamming of the mechanism when it is worn or inaccurate manufacturing.

Disclosure of utility model

EFFECT: exclusion of the mechanism jamming mechanism using an eccentric, as well as the implementation of the differential lock in any conditions, excluding accidental shutdown and activation of the locking mechanism, ensuring simplicity of the design. Also, the installation of an engagement mechanism with an eccentric washer to block the differential of the main transmission of the wheeled ATV allows three modes of operation of the main gear to be realized (the main gear is off, the main gear is connected, the differential lock on the connected bridge), and also will increase the reliability of data switching, eliminating the possibility of mechanism jamming .

This technical result is achieved by using a fork having a groove for an eccentric and realizing two points of application of force on the differential coupling. A device for converting a rotary motion into a reciprocating motion comprises an eccentric having a cylindrical shape and serving to transmit a reciprocating motion to a fork of the main gear differential by moving along a specially machined slot. At present, such switching mechanisms in differentials are new. The plug itself is fixed on a rigid axis, on which it makes a forward movement. Washer with eccentric is rotated by an electric motor. Randomly disabling the differential lock is not possible due to the use of an electric motor holding the washer with the cam in the desired position. During rotation, the eccentric transfers force to the walls of the fork groove, thereby ensuring the forward movement of the fork. The fork transfers the force to the differential clutch, thereby blocking the differential or disabling / connecting the main gear. Three modes of operation of the main gear (the main gear is off, the main gear is connected, the differential lock on the connected bridge) is implemented using two splined crowns, one of which is responsible for connecting the bridge, the second for the differential lock. The main part of the structure is located inside the main gear housing. The electric motor is attached to the crankcase from the outside and forms with it a single structural device.

Thus, the switching mechanism with an eccentric washer for locking the differential of the main gear contains an electric motor rigidly connected to the eccentric washer, an eccentric washer, a shift fork, having a groove for the eccentric movement, a fork axis that prohibits its movement, except for the translational one, a bridge coupling implementing three operation mode due to the presence of two spline rims: the disabled bridge at the conditional zero angle of rotation of the eccentric washer in the initial position; connected bridge when turning the eccentric washer 90 degrees with engaging only small splines and connected bridge when the differential is locked when turning the eccentric washer 180 degrees with the engagement of both splined crowns.

Comparison of the claimed technical solution with the level of technology for scientific, technical and patent documentation on the priority date in the main and adjacent headings shows that the set of essential features of the stated solution was not previously known, therefore, it meets the condition of patentability "novelty."

The proposed technical solution is industrially applicable, as it can be manufactured industrially and workable, feasible and reproducible, therefore, meets the condition of patentability "industrial applicability".

List of figures

FIG. 1 shows a general view of the design of the inclusion mechanism with an eccentric washer for locking the differential of the main transmission of the wheeled ATV in the initial position (the bridge is disconnected at the conditional zero angle of rotation of the eccentric washer).

FIG. Figure 2 shows the position of the eccentric washer when it is rotated 90 degrees; only small splines are in engagement (the bridge is connected).

FIG. Figure 3 shows the position of the eccentric washer when it is rotated by 180 degrees; both splined rims are in engagement (the bridge is connected and the differential is locked).

Implementation of the utility model

The figures indicate: 1 - electric motor, 2 - washer with eccentric, 3 - fork for switching modes of the differential, 4 - axis of the shift fork, 5 - clutch for switching modes of the differential.

Three modes of operation of the main gear (the main gear is off, the main gear is connected, the differential lock on the connected bridge) is implemented using two splined crowns, one of which is responsible for connecting the bridge, the second for the differential lock. FIG. 1 shows a general view of the design of the inclusion mechanism with an eccentric washer for locking the differential of the main transmission of the wheeled ATV in the initial position (bridge off). FIG. Figure 2 shows the position of the eccentric washer when it is rotated 90 degrees; only small splines are in engagement (the bridge is connected). FIG. Figure 3 shows the position of the eccentric washer when it is rotated by 180 degrees; both splined rims are in engagement (the bridge is connected and the differential is locked).

The fork has a groove for the eccentric and realizes two points of application of force on the differential coupling. The plug itself is fixed on a rigid axis, on which it makes a forward movement. Arbitrary disabling of the differential lock is impossible due to the use of an electric motor holding the eccentric in the desired position. Washer with eccentric is rotated by an electric motor. During rotation, the eccentric transfers force to the walls of the fork groove, thereby ensuring the forward movement of the fork. The fork transfers the force to the differential clutch, thereby blocking the differential or disabling / connecting the main gear.

This utility model was developed as part of the work under the Agreement dated September 26, 2017 No. 14.577.21.0272 MSTU. N.E. Baumana (Contractor) with the Ministry of Science and Higher Education of the Russian Federation (State Customer). The unique identifier is RFMEFI57717X0272.

Claims (1)

The switching mechanism with an eccentric washer to block the differential of the main transmission, containing an electric motor rigidly connected to the eccentric washer, an eccentric washer, a shift fork, having a groove for the eccentric movement, a fork axis that prohibits its movement, except for translational, a bridge coupling connecting three modes of operation due to the presence of two splined crowns: the disabled bridge at the conditional zero angle of rotation of the eccentric washer in the initial position; the connected bridge when turning the eccentric washer by 90 ° with the engagement of only small splines and the connected bridge when the differential is locked while rotating the eccentric washer by 180 ° with the engagement of both splined rims.

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