JPS5893626A - Interaxle differential locking device to be used for automoble having two axle type rear wheel - Google Patents

Abstract

PURPOSE:To maintain rear wheels of a front and a rear axle sides in a braking state reliably, by locking automatically an interaxle differential device when a propeller shaft side connecting an internal combustion engine with a driving shaft side is braked. CONSTITUTION:When a parking brake switch 16 is energized in response to pulling-up action of a parking lever, a solenoid valve 14 is released and compressed air sent into an air cylinder 30 from an air tank 13. With this, a sliding sleeve 11 is slided and a front drive gear 25 and a rear drive pinion shaft 23 are connected with each other. As an interaxle differential system, therefore, is locked automatically when a propeller shaft 41 is set in a braking state, a front drive shaft 27 and a rear drive shaft 28 are set in the braking state reliably and a movement of an automobile having two axles type rear wheel at the time of its parking is prevented from occurring.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an ink axle differential lock device used in a rear wheel two-axle type vehicle.

In general, a rear-wheel dual-axle vehicle is equipped with an ink-axle differential device, which transmits power from the internal combustion engine to the front and rear axle wheels, respectively, and allows the vehicle to drive around curves. However, when a difference in rotational speed occurs between the drive shafts, these drive shafts are differentially driven to prevent slippage and maintain good maneuverability.

However, the king brake system, which maintains the vehicle in a stopped state, usually maintains the drive shaft in a braking state, and connects the internal combustion engine installed in the vehicle with the drive shaft. Parking brake systems are broadly classified into those that maintain a braking state on the Zoroperra shaft side, and both types of parking brake systems have been applied to the above-mentioned rear-wheel two-axle type automobiles.

However, when such a jerking brake system that maintains the propeller shaft side in a braking state is applied to a rear wheel two-axle type vehicle, the parking
When the brakes are operated, the rear wheels on the front axle side and the rear wheels on the rear axle are not reliably maintained in a braking state, and there is a risk that the vehicle may move.

In other words, although the propeller shaft is maintained in a braking state by the operation of the jerking brake system, there is an ink axle between the overlying shaft and each drive shaft.・Because the differential device is arranged, each drive shaft side, in other words, the rear wheels on the front axle side and the rear wheels on the rear axle side, are allowed to rotate independently. When a two-wheel axle type vehicle is placed on uneven ground, there is a risk that the vehicle will move.

The purpose of this invention is to maintain the shaft side in a braking state by connecting the internal combustion engine side and the drive shaft side.
When the king brake system is operated, the ink, axle, and differential devices are automatically locked.
To provide an ink axle differential lock device used in a rear two-axle type vehicle that reliably maintains the drive shaft side, that is, the rear wheels on the front axle side and the rear wheels on the rear axle side, in a braking state. .

For this purpose, the ink/axle differential locking device used in the rear wheel two-axle type vehicle of the present invention locks the rear drive pinion shaft and the front drive gear in the ink axle differential device. A sliding sleeve splined to the rear drive pinion shaft for connection and disconnection, a fluid-operated shift unit for reciprocating the sliding sleeve, and a cylinder of the shift unit. a fluid pressure source connected via piping to the piping, a solenoid valve provided in the piping, a manually operated ink axle differential lock switch inserted into the electrical circuit of the solenoid valve, and a solenoid valve connected to the solenoid valve; In the electrical circuit of the valve, the brake system is connected in parallel to the switch and is capable of maintaining the propeller shaft side, which connects the internal combustion engine side and its ink axle differential device, in a braking state. and a t4-king brake switch which is energized in response to the pulling up movement of the braking lever.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred specific examples of the ink axle differential lock device used in a rear-wheel two-axle type vehicle according to the present invention will be described below with reference to the drawings.

The figure schematically shows a specific example 10 of an ink axle differential lock device used in a rear-wheel two-axle type automobile according to the present invention.

Ink axle used in rear wheel two-axle vehicles
The differential lock device i10 connects and disconnects the rear drive pinio shaft 23 and the front drive gear 25 in the inter-axle differential device 17. A sliding sleeve 11 spline-coupled to the shaft 23, a pneumatically operated shift unit 12 for reciprocating the sliding sleeve 11, and a pneumatic shift unit 12 connected to the air cylinder 30 of the shift unit 12 via a pipe 34. An air tank 13 as a fluid pressure supply source, a solenoid valve 14 provided in its piping 34, and an electric circuit 3 of the solenoid valve 14.
6 and its solenoid valve 14.
is connected in parallel to the switch 15 in the electric circuit 36, and connects the internal combustion engine (not shown) mounted on the rear wheel two-axle type vehicle to the ink axle differential chassis device 17. Propeller shaft 41
The A-King brake system that can maintain the side in a braking state. - A jerking brake switch 16 which is energized in response to the lifting operation of the brake lever (not shown).

The ink axle differential device 17 is built into a differential carrier (not shown) located on the rear side of the chassis frame (not shown) of a rear-wheel two-axle type vehicle, and one end is attached to the rear end of the differential carrier (not shown). A coupling 18 connected to the shaft 41, and a pair of differential pinions 21 disposed within the coupling 18 so as to face each other.
22, a rear drive pinion 19 arranged in mesh with the differential pinion 21.22 in its coupling 18, and a rear drive pinion 19 arranged in mesh with its differential pinion 21.22 in its coupling 1s.
22, a front drive gear 25 attached to the other front drive pinion 20, and a pinion meshed with the front drive gear 25. The drive gear 26 has one end attached to the pinion drive gear 26 and the other end gear connected to the front drive shaft 27 so as to pass through the shaft 43 and the front drive gear 25. and one end is the rear drive pinion 1
The rear drive pinion shaft 23 is attached to the rear drive pinion shaft 23 attached to the
The shaft 42 is connected to the other end of the shaft 23, and the other end is gear-connected to the rear drive shaft 28 side.

Of course, the ink axle differential device 17 is similar to the ink axle differential device 17 applied to existing rear-wheel two-axle vehicles.
'Since it is configured similarly to the axle differential device, a detailed explanation of its configuration will be omitted.

A sliding sleeve 11 is splined to a rear drive pinion shaft 23 in the ink axle differential device 17.

That is, the sliding sleeve 11 is assembled to the rear drive pinion shaft 23 so as to be able to slide back and forth along the axial direction, and the rear drive pinion shaft 23 and the front drive pinion shaft 23 are connected to each other. It is configured so that it can be connected to and disconnected from the gear 26.

Of course, a spline groove into which the sliding sleeve 11 is fitted is cut on the outer periphery of one end of the front drive gear 25.

Therefore, when the sliding sleeve 11 is placed as shown in the figure and separated from one end of the front drive gear 26, the front
The drive gear 25 and its I77 dry propinion shaft 23 are completely disconnected, that is, the front
Drive shaft 27 and rear drive shaft 2
8, each independent rotation is allowed.

Also, the sliding sleeve 11 is slid to the left in the figure, and the front drive gear 25
When fitted at one end, its front drive gear 25 and its rear drive pinion shaft 23 are connected to each other, i.e. its front drive shaft 27 and rear drive shaft 28 are connected to each other. and are placed in a state where they can be rotated together at the same speed.

The sliding sleeve 11 is slid back and forth using a pneumatically operated shift unit.

The shift unit 12 includes a casing 29 equipped with an air cylinder 30 on the -blade side;
a piston 32 disposed so as to be reciprocally slidable within the casing 29, with one end attached to the piston 32 and the other end extended to the other side of the casing 29; The supported operating rod 31 is attached to the operating rod 31 at the base side, and the tip is attached to the sliding sleeve 11 at the 4th section.
44 and its air cylinder 3 so as to maintain its piston 3z in a normal state.
and a return spring (not shown) disposed within zero.

Of course, the casing 29 is configured to be integral with the differential carrier.

Air cylinder 30 in the shift unit 12
is connected to a pneumatic supply source and an air supply via piping 34.
It is connected to tank 13.

Further, the solenoid valve 14 is inserted into the pipe 84. The solenoid valve 14 is opened and closed by an electric signal sent to a solenoid coil 35, and is configured to exhaust compressed air from the air cylinder 30 when it is closed.

Of course, the solenoid valve 14 is constructed similarly to the solenoid valve applied in the existing pneumatic control circuit, so a description of its construction will be omitted.

A manually operated engine/axle differential lock switch IS is inserted into the wiring 37 connected to the lenoid coil 35.

The ink axle differential lock
Switch 1G is a rear wheel two-axle type vehicle.

The device is installed in an appropriate position in the instrument armpit (not shown) of the device.

Of course, the patch IJ-40 is inserted into the wiring 37, and the negative side of the patch IJ-40 is annealed to the vehicle body side, and the wiring 38 connected to the solenoid coil 35 is also connected in the same way. It is grounded to the vehicle body side.

Also, the wiring 37 in the electric circuit 36 of the solenoid valve 14
A driving brake switch 16 is connected to the ink axle differential lock switch 15 in parallel with the ink axle differential lock switch 15.

The /4'-king brake switch 16 is attached to the rear-wheel two-axle type automobile in response to the pulling up of the g-king lever (not shown) in the 1-ki system. It is configured in a permanently open type so that it can be

In other words, the A? - The king brake system is connected to the internal combustion engine (not shown) mounted on the rear wheel two-axle type vehicle and the above-mentioned ink axle differential device 1.
The parking/brake switch 16 is configured such that the parking shaft 41 connecting the parking lever 7 can be maintained in a braking state by pulling up the parking lever. 4) energized by the lifting action of the king lever.

The king brake system is constructed in the same way as the parking brake system in existing rear-wheel two-axle vehicles that can maintain the derailleur shaft side in a braking state, so the explanation of its construction is as follows: Omitted.

Also, that no J? - Is the King play key switch 16 like that? −In the king brake system,
A brake lamp (not shown) is usually installed near the rear king lever so that the driver is aware that the brake is being applied. Of course, it is also possible to apply a switch as described above.

Next, an ink axle differential lock device 10 used in a rear wheel two-axle type vehicle according to the present invention.
The operation will be explained.

First, when a rear wheel two-axle type vehicle is parked,
・Pull up the parking lever to operate the keying brake system.

When the pulling lever is pulled up, the puller 1::> shaft 41, which connects the internal combustion engine mounted on the rear wheel two-axle type vehicle and the ink axle differential device 17, is placed in a braking state. He added 1 more
A like that? -King Shi/? - In response to the lifting operation, the parking brake switch 16 is energized.

When the pulling play 1 key switch 16 is energized, current flows through the solenoid coil 35 of the solenoid valve 14, opening the solenoid valve 1.4 and opening the working tank 1.
Compressed air from 3 is supplied to pneumatically operated shift unit 1.
2 into the air cylinder 30.

When compressed air is sent into the air cylinder 30 in this way, the shift fork 33 moves to the left in the figure due to the sliding of the piston 32, and the sliding sleeve 11 is slid. 11 is fitted into one end of the front drive gear 25.

In other words, the front drive gear 2S and the rear
A drive pinion shaft 23 is connected by its sliding sleeve 11.

Therefore, with the parking brake system mentioned above,
The propeller shaft 41 is placed in a braking condition, and
Its front drive gear 25 and rear drive gear
Since the pinion shaft 23 is connected and locked by its sliding sleeve 11, it is ensured that the two front drive shafts and the rear drive shaft 28 are in a braking state, so that during such parking This prevents the movement of rear-wheel dual-axle vehicles.

Of course, if the manually operated ink axle differential lock switch 1G is energized in the ink axle differential lock device 10 used in the rear wheel two-axle type automobile of the present invention described above, the above-mentioned As in the case, its front drive gear 2
5 and the rear drive pinion shaft 23 are connected by its sliding sleeve 11.

In other words, when a rear-wheel two-axle type vehicle drives on snowy roads, muddy roads, etc., its manually operated ink axle
energizing the differential lock switch 16;
Its front drive gear 25 and rear drive gear
It runs while connected to the pinion shaft 23.

So front drive gear like that? 5 and the rear drive pinion shaft 23 are connected, and if the rear wheel two-axle type vehicle drives on a snowy road, muddy road, etc., the front drive shaft 27 and the rear drive shaft 28 are connected as one body. Since the wheels are rotated at the same speed, differential motion is reduced, spin is prevented during running, and running stability is improved.

According to this invention, which is one of the above, when the propeller shaft side connecting the internal combustion engine side and the drive shaft side is maintained in a braking state, when the IP-King brake system is operated, the ink An ink used in rear-wheel two-axle vehicles in which the axle differential device is automatically locked and the drive axle side, that is, the rear wheels on the front axle and the rear wheels on the rear axle, are maintained in a reliably braking state.・Axle differential lock device is obtained.

[Brief explanation of the drawing]

The figure is a schematic view showing a specific example of an ink axle differential lock device used in a rear wheel two-axle type vehicle according to the present invention. DESCRIPTION OF SYMBOLS 10... Ink axle differential lock device used in a rear wheel two-axle type vehicle, 11... Sliding sleeve, 1z... Fluid operated shift unit, 1B... Air tank ζ14 ... Solenoid valve, 15... Manually operated inter-axle differential lock switch, 16... Parking brake switch, 17... Ink axle differential device, 23... Rear ° drive pinion shaft, 25...Front drive gear, 30...Pair cylinder, [←...Piping,
36... Electric circuit, 41... Propeller shaft.

Claims (1)

[Claims] Splined to the rear drive pinion shaft of the ink axle differential device so as to connect and disconnect the rear drive pinion shaft and the front drive gear. A sliding sleeve, a fluid-operated shift unit that slides the sliding sleeve back and forth, a fluid pressure supply source connected to the cylinder of the shift unit via piping, and a solenoid valve provided in the piping. and a manually operated ink valve inserted into the electrical circuit of the solenoid valve.
The electric circuit of the axle differential lock switch and its solenoid valve is
It can maintain the propeller shaft side connected to the differential device in a braking state. It includes a jerking brake switch that is energized in response to the pulling up of the parking lever of the mother-king brake system. Ink axle differential lock device used in rear two-axle vehicles.