The differential lock of the vehicle

 

The invention relates to mechanical engineering and can be used in vehicles terrain. In the blocking device and the governing body of the locking mechanism of the differential elements of the Parking brake system: lever, ratchet mechanism, a flexible rod, brake pads, brake drums. The control lever is kinematically connected with a ratchet and rigidly connected to the axle. On the axis through the spline set coupling coupling for axial movement and the introduction of an electromagnet. Coupling coupling associated with the slots of the rotary levers. Swing arms are connected by a flexible shaft with the brake pads, kinematically connected with the brake drums. Between the clutch coupling and the electromagnet installed recoil. An electromagnet mounted rigidly on the body of the vehicle and electrically connected to the switch, the first output of which is connected to the first input and the second output to the second input of the electromagnet. The technical result is to simplify the design. 2 Il.

The invention relates to mechanical engineering and can be and the increased friction of the GAZ-66 (technical passport of the car GAZ-66), designed to block the drive wheels of the drive axle at slipping through the use of the friction torque between pausetime gears, compensating the difference between the torque axes arising from the difference of the torques of the clutch wheel and the road surface. The disadvantage of this differential is that because of the inevitable cross-axle kinematic misalignment of the actuator is blocked in almost the entire period of movement of the machine, resulting in unproductive expenditure of energy, wear running gear and drive. Worse handling and stability of the vehicle when driving on asphalt. This is due to the fact that at the back the wheel of time several times and it tends to "push" the car out of the turn, increases fuel consumption.

Also known differentials with full lock having a coupling rigidly connecting the (blocking) the housing of the differential and half-shaft gear. The drive coupling may be mechanical, hydraulic, and control of the lock is performed by the driver (locking center differential VAZ-21213, VAZ-2121, Ershov B. C. ed. "Vyscha SHKOLA, Kiev, 1985), after overcoming tradeprof what I otherwise, the tires and the transmission will act to excessive load, and the car will be worse to manage.

The closest to the essential features of the claimed technical solution is the device "a limited-slip differential wheeled vehicles" (Patent RF №2162974, F 16 N 48/30, 10.02.01, bull. No. 4) containing a differential gear, a Central wheel which is rigidly connected with the axles of drive wheels, and a locking device which includes coupling sleeve and the governing body. The governing body consists of sensors of angular velocity and the measurement scheme of the private branch of the angular velocity and comparing it with a preset critical value, which is calculated by the formula. The output of the said circuit through the rectifier is connected to the servo. Leading coupling coupling coupling is connected with the planet carrier of the differential gear. Her slave coupling mounted on the splines of one of the axes with the possibility of axial movement and kinematically connected with the servo. The disadvantage of this device is the design complexity, since the structure of the device includes a measurement scheme private from division angular velocity and compare it with the specified critical has low performance. The disadvantages of this self-locking differential wheeled vehicles should also be noted that the differential lock is in the discrete mode, the duration is determined by the parameters of the time relay. If the difficult part is not over, it starts slipping, then the signals from the speed sensors include a differential lock again. This process occurs before the end of a difficult road. This differential reduces the efficiency of the lock, which has a negative effect on the level terrain vehicle.

The purpose of the invention is to simplify the design, and thus improving performance.

This objective is achieved in that the blocking device and the governing body of the used elements of the Parking brake system including a control lever Parking brake ratchet mechanism, a flexible rod, brake pads, rigidly United with pausetime the differential gears, and a control lever of the Parking brake system is kinematically connected with the ratchet can be locked and rigidly connected to the axle, the mouth is zmoznostjo axial movement and the introduction of an electromagnet coupling clutch, kinematically associated with the slots of the rotary levers, which are connected by a flexible shaft with the brake pads, kinematically connected with the brake drums, with installed recoil between the coupling sleeves and an electromagnet mounted rigidly on the body of the vehicle and electrically connected to the switch, the first output of which is connected to the first input and the second output to the second input of the electromagnet

In Fig.1 schematically shows a differential lock that contains a blocking device containing the brake drum 8, is rigidly connected with the axle 7 and polovoy gear 13, the brake pads 9, United flexible shaft 17 with the pivoting arm 20 of Fig.2 is a circuit diagram of the switch.

The governing body holds the lever 27 of the control of the Parking brake system is kinematically associated with the ratchet mechanism (gear sector 24, doggy 25, traction control dog 26) can be locked and rigidly connected with the axis 28 that is installed on the supports 19 for rotation on the axis 28 is made spline connection and installed with the possibility of axial movement and carrying an electromagnet coupling clutch 21, kinematically ftoi 21 and the electromagnet 22, mounted rigidly on the body of the vehicle.

The differential lock works as follows.

Situation 1. Maneuvering without slippage.

The switch is n neutral position, the electric current in the winding of the electromagnet 22 is missing. Coupling coupling 21 under the influence of return spring 23 are in engagement with the rotary lever 20, connecting it with the spline with the axis 28.

When the lever 27 control Parking brake its rotation through the axis 28, the coupling of the coupling 21, the swing arms 20, flexible rod 17 is transmitted to the brake pads 9, the differential lock while running manual brakes.

Situation 2. Complex road traffic conditions.

Skidding, stalling for example the left drive wheel. The switch is placed in the corresponding position, which is signaled by the indicator lamp on the coil of the electromagnet 22 to feed current to the electromagnet 22, overcoming the force of the return spring 23, drawing the coupling sleeve 21, releasing the swivel arm 20 of the right wheel. The force of the lever 27 of the control of the Parking braking system is only the brake pads 9 of the left wheel, which createroot. Thus the amount of torque transmitted from the main transmission through the differential gear at the back right wheel is increased, improving the maneuverability of the vehicle.

Take into account that for a symmetric differential Tob==1,

where Kb- coefficient lock

M1- torque at the back wheel,

M2- torque on the runner wheel.

For example, when Kb=3 the point at the back wheel (not stalled) will be 3 times more than stalled (runner).

Indeed, the claimed differential lock compared to the prototype simpler, since it does not contain coupling clutch differential measurement scheme private from division angular velocities and comparing it with a preset critical value, the amplifier, which are complex electronic devices. The locking mechanism locks the differential for the entire period of passage of difficult section of the road, not in discrete mode, as is the case in the prototype, so the efficiency of the locking mechanism above. All the devices included in the locking mechanism, are widely used Sogno for sale on stationary process equipment.

Claims

The differential lock of a vehicle, containing a blocking device, the governing body, characterized in that the blocking device and the governing body of the used elements of the Parking brake system including a control lever Parking brake ratchet mechanism, a flexible rod, brake pads, brake drums, rigidly United with pausetime the differential gears, and a control lever of the Parking brake system is kinematically connected with the ratchet can be locked and rigidly connected to the axle, mounted on bearings for rotation, while on an axis through the spline connection is established with the possibility of axial movement and the introduction of an electromagnet coupling clutch, kinematically associated with the slots of the rotary levers, which are connected by a flexible shaft with the brake pads, kinematically connected with the brake drums, with return spring installed between the clutch coupling and an electromagnet mounted rigidly on the body of the vehicle and electrically connected to the switch, the first output of which is connected with p

 

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