JPH0320187Y2 - - Google Patents

Description

[Detailed explanation of the invention] (a) Industrial application field This invention is applicable to traveling vehicles such as tractors.
The vehicle height of the front and rear wheels can be changed based on the aircraft's running power from the engine.

(B) Prior Art It is known that the vehicle height of a tractor or the like can be adjusted by removing the axle case and attaching it in reverse. For example, Utility Model Publication No. 56-11910, JP-A-59-
As in Publication No. 202938.

(c) Issues that need to be solved by the invention However, with conventional vehicle height adjustment devices, it is necessary to lift the aircraft using a crane or lift device after removing the axle case, which requires a fully equipped maintenance shop or other facility. Adjustments could only be made in the locations where they were placed.

This invention allows a single operator to adjust the vehicle height even in locations without cranes or lifts.
The aircraft was lifted using the driving force from the tractor's engine.

When lifting the front wheels with this configuration, if the rear wheels are driven and rotated, the rear wheels will move forward even though the front wheels do not move, creating a kind of two-way mesh situation, which is dangerous. A clutch device is provided that connects and disconnects only the rear wheels in order to transmit driving force to the front wheels and leave the rear wheels free during work to raise the vehicle height.

When raising the rear wheels using engine drive power, it is possible to cut off the power to the front wheels using a normally provided front wheel drive clutch device. Conventionally, no clutch was provided that could be disengaged.

By setting the gear position to neutral, power to the rear wheels can be cut off, but in this case, power to the front wheels is also cut off.

(c) Means for Solving the Problems The purpose of the present invention is as described above. Next, the configuration for achieving the purpose will be explained.

The front axle case 4 rotates around a rotation shaft 5 that transmits power from the front axle shaft 18, and revolves around the rotation gear 7 fixed to the rotation shaft 5 while rotating together with the front axle case 4. Axle gear 8
The axle gear 8 is fixed to a front axle 6 that is pivotally supported on the front axle case 4, the front wheel 1 fixed to the front axle 6 is fixed so as not to be movable back and forth, and the front axle shaft 18 is rotated by the engine. By this,
The height of the front wheel 1 can be raised, and the rear axle shaft 4
7, and an axle gear 35 that rotates around the rotating gear 36 fixed to the rear axle shaft 47 and revolves together with the rear axle case 33. The gear 35 is fixed to a rear axle 62 that is pivoted to the rear axle case 33,
The rear wheel 11 fixed to the rear axle 62 is fixed so that it cannot be moved back and forth, and the rear axle shaft 47 is rotated by the engine, so that the vehicle height of the rear wheel 11 can be raised, and the front wheel axle case 4 is raised by the weight of the aircraft. In a configuration in which the rear wheel axle case 33 rotates around the rotating shaft 5 and the rear axle shaft 47 to lower the vehicle height of the front wheels 1 and the rear wheels 11, the power of the transmission case M is transferred to the front wheels. However, it is equipped with a rear wheel clutch device that does not allow transmission to the rear wheels.

(E) Embodiment of the invention The purpose and structure of the invention are as described above. Next, the structure of the embodiment shown in the attached drawings will be explained.

FIG. 1 is a rear view of the tractor with the vehicle height raised, and FIG. 2 is a rear view of the tractor with the vehicle height lowered.

In order to widen the uses of tractors, the second
As shown in the figure, the vehicle height can be lowered so that it can pass under the drooping branches of an orchard, and as shown in Figure 1, the vehicle height can be raised and crops can be grown on the ridges. It is necessary to be able to pass even at the top.

For this purpose, it is necessary to be able to adjust the vehicle height, and it is necessary to be able to adjust the entire body up and down with respect to the front wheels 1 and rear wheels 11. 13 is a rear axle housing, 12 is a rear axle case, and 14 is a fender.

Fig. 3 is a cross-sectional view of the front axle housing 19 adjusted higher relative to the front wheel 1, Fig. 4 is a side view of the same, and Fig. 5 is a view of the rotation support portion of the front wheel axle case 4 for adjusting the vehicle height. It is an enlarged sectional view.

The rotation after being shifted in the transmission case M disposed at the front of the rear axle case 12 is transmitted from the bevel gear 22a of the front wheel power transmission shaft 22 to the front derailleur gear via the front wheel drive clutch device C. The signal is transmitted to the ring gear 23 of device D.

Differential rotation is applied by the front differential gear device D, and the left and right front axle shafts 18 are driven. The front axle housing 19 projects left and right from a central front differential case 21, and an upper fixed gear box 24 is disposed at the tip of the front axle housing 19. A case lid 25 is supported by a bearing in an opening at the upper end of the upper fixed gear box 24, and the case lid 25 also serves as a knuckle arm.

Further, the lower rotary gearbox 2 is loosely fitted to the lower end of the upper fixed gearbox 24 via a bearing. The lower rotating gearbox 2 and the case lid 25 are integrated at the upper part, and can be rotated for steering from the knuckle arm side while being pivotally supported above and below the upper fixed gearbox 24.

A stationary bracket 3 is fixed to the outer surface of the lower rotating gear box 2 with an adjustment shim interposed therebetween for adjusting the tooth contact between the bevel gears 9 and 10. A front wheel axle case 4, which can be rotated up and down to adjust the vehicle height and also serves as a rotating bracket, is fitted into the fixed bracket 3.

The front axle case 4 also serves as a rotating side bracket, and supports a rotating shaft 5 and a front axle 6 by bearings. The front wheel 1 is fixed to the front axle 6.

Further, a bevel gear 17 is fixedly installed at a position where the side end of the front axle shaft 18 is fitted into the upper fixed gear box 24. The bevel gear 17 meshes with the bevel gear 16 on the kingpin shaft 15, and the rotation of the bevel gear 16 is transmitted through the kingpin shaft 15 to the bevel gear 10 in the lower rotating gear box 2.
has been communicated to.

The king pin shaft 15 has an upper end supported by a bearing in the upper fixed gear box 24 and a lower end supported by a bearing in the lower rotary gear box 2. A bevel gear 10 in the lower rotating gear box 2 meshes with a bevel gear 9 fixed to the rotating shaft 5 in the front wheel axle case 4, which also serves as a rotating side bracket, to rotate the rotating shaft 5.

The position of the rotating shaft 5 inside the axle case 4 is as follows:
A rotating gear 7 is fixedly installed, and this rotating gear 7 meshes with an axle gear 8 on the front axle 6 to drive the front axle 6 and the front wheels 1.

An oil dipstick 20 that also serves as a lubrication plug is arranged above the center of the front axle housing 19, and is connected to the front differential case 21 and the upper fixed gear box 2.
4. Lower rotating gearbox 2 and front wheel axle case 4
The structure is designed to inject lubricating oil until the end.

26 is an air vent and a drain vent. A fixed side bracket 3 is interposed on the outer surface of the lower rotating gear box 2 to support the rotating shaft 5 and to form a ring-shaped groove 3c for smooth rotation of the front wheel axle case 4. be. The fixed side bracket 3 is attached with a bolt 3 to the lower rotating gear box 2.
It is fixed at 0.

A rotating shaft 5 is pivotally supported by a bearing 31 of the fixed side bracket 3, and a front axle 6 is rotated around the rotating shaft 5.
This part can be rotated to adjust the vehicle height.

Furthermore, a ring-shaped groove 3c into which the rotation support part 4c of the rotation side bracket of the front wheel axle case 4 can be fitted is provided on the outer surface of the fixed side bracket 3, and when both are fitted, the fitting part is used to drive the vehicle. This allows for rotation for high adjustment.

A locking groove 4a is provided on the side of the front wheel axle case 4 so that the portion of the rotation support portion 4c fitted in the ring-shaped groove 3c can rotate without slipping out.
A locking bolt 27 that is fitted into the bracket a protrudes from the side of the fixed bracket 3.

Further, as shown in FIGS. 4 and 5, a rotation prevention device is provided between the fixed side bracket 3 and the front wheel axle case 4 to fix the subsequent rotation of the front wheel axle case 4 after the vehicle height is changed to high or low. The parts 3a, 3b and the abutting part 4b are configured. The contact portion 4b is provided at only one location on the front wheel axle case 4, and comes into contact with the rotation prevention portions 3a, 3b of the stationary side bracket 3 at a position where the front wheel axle case 4 has rotated 180 degrees. It is configured to prevent further rotation.

The abutment portion 4b protruding from the front wheel axle case 4 and the rotation prevention portion 3 at a position rotated 180 degrees from there.
The front wheel axle case 4 is attached to the parts corresponding to a and 3b.
There are screw holes for fixing bolts 28, 28 for fixing the vehicle after it has been rotated to adjust the vehicle height. By threading the fixing bolts 28, 28 into the screw holes, the vehicle can be fixed after adjusting the vehicle height.

Next, the vehicle height adjustment device for the rear wheels 11 will be explained.

Figure 6 is a front sectional view of the vehicle height adjustment device configured in the rear axle housing of the tractor;
The figure is a side view seen from the rear wheel axle case 33 with the vehicle height raised, and Figure 8 is a lowering lock pin 50.
9 is an enlarged sectional view of the rear wheel clutch device, and FIGS. 10 and 11 are axial sectional views showing the operating state of the rear wheel clutch device.

A rear wheel height adjustment device is arranged on the left and right sides of the rear axle case 12 of the tractor. A rear axle housing 13 is fixed to the side surface of the rear axle case 12, and a brake case 13e is formed at the joint surface between the rear axle case 12 and the rear axle housing 13, and a disc brake device is disposed therein. A differential gear device D is disposed inside the rear axle case 12, and FIG. 6 shows a portion of the differential gear device D including the deflock device 38. A rear axle shaft 47 spline-fitted to the differential side gear 34 of the differential gear device D protrudes from the rear axle case 12 and is fitted from the inside of the rear axle housing 13 to the inside of the rear wheel axle case 33.

Rear axle case 1 of the rear axle shaft 47
The disc brake device is engaged with the part protruding from 2. The disc brake device is composed of a brake friction plate 40, a brake cam disk 39, and a cam ball 41, and includes a brake arm 4.
2, the arm shaft 43 rotates, and by rotating the brake cam disc 39 via the link, the cam ball 41 is pushed out and presses the brake friction plate 40 to perform braking. .

The rear axle case 33 is composed of a rotating inner cylinder 33a, a case lid 33b, and the main body of the rear axle case 33. The rear axle shaft 47 and the rear The axle 62 is supported by a bearing, and the rear axle shaft 4
A rotary gear 36 is fixedly installed on the rear axle 62, and an axle gear 35 is fixedly installed on the rear axle 62.

A rotating inner cylinder 33a protruding from the rear axle case 33 toward the rear axle housing 13 is fitted inside the rear axle housing 13, so that the rear axle case 33 can be rotated back and forth and up and down. It is.

The rear axle housing 13 has a brake case 13e on the side of the rear axle case 12, and a flange 13a fixed to the rear axle case 33 on the opposite end. During normal work, the fixed flange portion 13a is connected to the inner surface of the rear wheel axle case 33 by rotating the fixing bolts 32, 3.
7 is screwed on and fixed.

And the rear axle 62 is attached to the aircraft to adjust the vehicle height.
Only when moving the position up and down, the rotation fixing bolts 32 and 37 are removed and the rear axle case 33 is rotated relative to the rear axle housing 13.

Even when the rotation fixing bolts 32 and 37 are removed, the rotation inner cylinder 33a and the rear axle housing 1
In order to prevent the rotation locking pin 31 from falling out, a rotation locking groove 33c is provided on the outer periphery of the rotation inner cylinder 33a, and the rotation locking pin 31 is inserted into the rotation locking groove 33c from the rear axle housing 13 side. The pin part at the tip is inserted.

When attempting to lower the vehicle height, by removing the rotation fixing bolts 32 and 37, the space between the rear wheel axle case 33 and the fixed flange portion 13a slides, and the rear wheel axle case 33 is attached to the rear axle shaft 47. The rear axle 62 rotates around the rear axle shaft 47.
It comes to a position higher than that.

However, when the rotation fixing bolts 32, 37 are removed, the rear wheel axle case 33 immediately rotates due to the tractor's own weight, and the hands and fingers of the operator who is trying to remove the rotation fixing bolts 32, 37 immediately rotate. A lowering lock pin 50 is supported on the front surface of the rear axle housing 13 to prevent the axle 62 from immediately lowering simply by removing the rotation fixing bolts 32, 37, as this may damage the rear axle housing 13.

The structure of the lowering lock pin 50 will be explained with reference to the drawing of FIG.

A support case 13h for a lowering lock pin 50 is protruded from the front surface of the outer shape of the rear axle housing 13, and the lowering lock pin 50 facing left and right is slidably supported in a hole bored in the support case 13h. ing. The lowering lock pin 5
0 is always urged in the locking direction by the urging spring 56. The lowering lock pin 50 is engaged with the engagement recess 33f of the rear wheel axle case 33 shown in FIG. Therefore, the lowering lock pin 50 always moves from the fixed flange portion 13a of the rear axle housing 13 to the engagement recess 33 of the rear wheel axle case 33, which rotates up and down to adjust the vehicle height.
Even if the operator pulls out the rotation fixing bolts 32 and 37 to adjust the vehicle height, the lowering lock pin 50 will still be in the engagement recess 33f.
The final deceleration case 33
does not rotate in the direction of lowering the vehicle height.

In order to release the locked state of the descending lock pin 50, the lock release wire 54 that operates the shifter 52, lever 53, and arm 55 is located at the front of the operator's driver's seat, so the user must reach there. Operate the lock release wire to push the lowering lock pin 50 back against the biasing spring 56 to release the rear axle case 33 and the rear axle housing 13.
It is necessary to release the engaged state. In this case, since the operator needs to stay away from the vehicle height adjustment device, accidents caused by the sudden descent of the vehicle height adjustment device will not occur.

Next, FIGS. 7 and 8 will be explained.

The fixed flange portion 13a of the rear axle housing 13 is connected to the rear axle case 33 at two locations: when the vehicle height is low as shown by the solid line in FIG. 7, and when the vehicle height is high as shown by the chain line 33'. Since it is necessary to fix the axle housing 13, protruding fixing surfaces 13b and 13f for fixing are protruded like two corners. And the protruding fixing surface 13b, 1
Fitting hole 13d for rotation fixing bolt 32 in part 3f
has been established. The protruding fixing surfaces 13b and 13f
A fitting hole 13C for the rotation fixing bolt 37 is formed at the opposite position of 180 degrees.

At the high vehicle height position shown in Figure 7, rotate the fixing bolt 3.
When the vehicle height becomes lower from the position where 2 and 37 are screwed, they are inserted into the insertion holes 13c and 13d. In order to adjust the vehicle height, when the rear axle case 33 rotates relative to the rear axle housing 13, an upper limit stopper 48 and a lower limit stopper 67 are set to indicate the end position of the rotation for vehicle height adjustment. It is constructed and arranged using bolts. What is engaged with the lower limit stopper 67 is a portion of the engagement recess 33f that engages with the aforementioned lowering lock pin 50. The portion that engages with the upper limit stopper 48 is the engagement recess 33g of the rear wheel axle case 33. The stoppers 48, 67 and above are constructed so that they cannot rotate.

Next, the rear wheel clutch device will be explained with reference to FIGS. 9, 10, and 11.

By fitting the clutch shifter 59 into the rear axle 62 and moving the clutch shifter 59 in and out, the cam recess 59a and the protrusion cam protrusion 59 are removed.
b causes the clutch ball 29 to protrude and retreat, thereby connecting and disconnecting the power between the rear axle 62 and the axle gear 35. 60 is a spring that biases the clutch shifter 59 in the pushing direction. Since the rear wheel clutch device is used only to adjust the vehicle height of the front wheels, it is used infrequently, and the clutch shifter 59 is configured to be operated by hand.

(f) Function of the invention The above is the structure of the invention. Next, the operation of adjusting the front wheel height will be explained.

When adjusting the vehicle height of the front wheels 1, the operator uses a wrench to remove the fixing bolts 28, 28.

At this time, when changing the vehicle height from a high state to a low state, there is a possibility that the machine body will descend due to the tractor's own weight, and for this reason, fixing bolts 28, 2
8, there is a risk that the front wheel axle case 4 may suddenly rotate around the fixed side bracket 3, and the brake device separately installed on the rear wheel 11 side makes it impossible for the aircraft to move even slightly. It is necessary to do so. By locking the rotation and revolution between the rotating gear 7 on the rotating shaft 5 and the axle gear 8 on the front axle 6 by the brake operation,
Unexpected declines can be prevented.

After all the fixing bolts 28, 28 on the left and right sides have been removed, by gradually loosening the brake device, the front wheel axle case will rotate around the rotation axis 5 due to the weight of the aircraft and will descend. It is coming. At this time, the rotating gear 7 of the rotating shaft 5 revolves around the axle gear 8 of the front axle 6 while rotating, and gradually descends.

When the vehicle height changes from a low state to a high state, the vehicle cannot be adjusted by its own weight as described above, so in this case, the driving force of the tractor is used to lift the vehicle body.

That is, when adjusting the vehicle height of the front wheels 1, the power to the rear wheels 11 is disengaged so as not to be transmitted to the rear wheels, and the power can be transmitted to the front wheels by connecting the front wheel drive clutch C. It is structured like this.

Also, to prevent the front wheels from rotating, a locking body is placed under the tires to prevent them from rotating.
After removing the fixing bolts 28, 28, the operator sits on the seat and puts the tractor into running condition. In this embodiment, when the gear stage is positioned at the forward creep speed and the clutch is gradually engaged, the front wheels 1 and 6 cannot rotate, so the rotating gear 7 of the rotating shaft 5 is shifted to the front shaft gear. 8, revolves around the front wheel axle case 4,
It is rotated around the rotation shaft 5 and raised.

At the position raised to the maximum position, the abutment part 4b abuts against the rotation prevention part 3a, and in this state the front wheel 1 is stabilized due to its caster angle. After applying the brakes to prevent it from falling under its own weight, the threaded holes of the fixing bolts 28, 28 are aligned, and the fixing bolts 28, 28 are screwed in to fix it.

Next, the vehicle height adjustment effect of the rear wheels 11 will be explained.

FIG. 7 shows a state in which the vehicle height is high, and the operation of lowering the vehicle height by moving the rear wheel axle case 33 from this state to the position 33' will be explained.

In this case, the weight of the tractor causes the rear axle case 33 to rotate and the machine body attempts to move to a lower position, so there is no need to use engine power.

In this case, the drive of the front wheels is stopped by the front wheel drive clutch C, the rear wheels 11 are locked by contacting the tires with a locking body to prevent them from rotating, and the brakes are applied to prevent the aircraft from moving and descend. After confirming that the lock pin 50 is in the locked state,
The rotation fixing bolts 32 and 37 fixing the rear wheel axle case 33 and the fixed flange portion 13a are removed.

If the rotation fixing bolts 32 and 37 are removed, the space between the rear wheel axle case 33 and the fixed flange portion 13a can be rotated around the rear axle shaft 47, but on the side where the vehicle height is going to be lowered. The lowering lock pin 50 protrudes in the direction of , and the engagement recess 33 f of the rear axle case 33 engages with the lowering lock pin 50 . It does not rotate.

After removing the rotation fixing bolts 32 and 37, the operator returns to his seat, operates the lock release wire 54, pulls out the lowering lock pin 50 against the biasing spring 56, and first releases the locked state of the lowering lock pin 50. It is. Next, when the brakes are gradually released to allow rotation of the rear axle shaft 47 and rotating gear 36, the rear axle shaft 47 rotates, the rotating gear 36 rotates around the axle gear 35, and the aircraft is going down.

When the aircraft fully descends due to this operation,
The engagement recess 33f comes into contact with the lower limit stopper 67, and further rotation is prevented. At this position, the rotation fixing bolts 32 and 37 are fitted into the insertion holes 13d and 13c again to fix the space between the rear wheel axle case 33 and the fixed flange portion 13a.

Next, we will explain the case where the vehicle height is increased from the low vehicle height state as described above.

In this case, conventionally, after removing the space between the rear axle housing 13 and the final reduction case 33, lifting the aircraft with a crane or lift, rotating the rear axle case 33 downward, and fixing it again. However, in the present invention, the driving force of the tractor's engine is used to shift the traveling gear to the forward creep gear so that the rotational force of the rear axle shaft 47 is used to adjust the vehicle height. This makes it possible to lift.

In this case as well, a lock body is held under the tire of the rear wheel 11 to prevent rotation of the rear wheel 11, the travel brake is applied, and in the case of front wheel drive, the front wheel drive clutch C is disengaged. Then start adjusting the vehicle height.

Then, the rotation fixing bolts 32 and 37 are removed to first release the connection between the final reduction case 33 and the fixed flange portion 13a. Even in this state, the body remains stable in the lower position, and since the engagement recess 33f engages with the lower limit stopper 67, there is no rotation between the rear wheel axle case 33 and the fixed flange 13a.

Next, the operator sits in the seat, starts the engine, shifts the gear lever to creep forward gear, releases the brake, and gradually engages the seed clutch. As a result, the rear axle shaft 47 is
rotates, and the rotating gear 36 at the tip of the rear axle shaft 47 rotates slowly. In this state,
Since the rear wheel 11 cannot rotate by sandwiching the lock body under the tire, the rotating gear 36 is connected to the axle gear 35.
It revolves around the rear axle axis 4 while rotating on its own axis.
7 and the fixed flange portion 13a are lifted against the weight of the aircraft.

Finally, with the engagement recess 33g in contact with the upper limit stopper 48, the lowering lock pin 50, which is pressed by the biasing spring 56, protrudes and engages with the engagement recess 33f.

As a result, the lowering lock pin 50 prevents the rear wheel axle case 33 from lowering, so it is safe and the operator can get off the seat and tighten the rotation fixing bolt 32.
37 is screwed on again.

(g) Effects of the invention Since the invention is constructed as described above, it has the following effects.

First, the vehicle height of the front and rear wheels can be adjusted using mechanical power using the driving force of the tractor engine, so it can be done in the field without the need for a fully equipped maintenance shop as in the past. This means that the operator can do it alone, allowing him to diversify the work he does with the tractor.

Second, when adjusting the vehicle height of the front wheels, if you try to raise the vehicle height using the driving force, when the rear wheels are driven, a situation similar to double meshing will occur, forcing the rotating gears and axle gears to There is a force acting on it,
By providing a rear wheel clutch device that cuts off power to only the rear wheels as in the present invention, the front wheels can be driven while the rear wheels can be left free, making it possible to achieve a safe condition.

[Brief explanation of the drawing]

FIG. 1 is a rear view of the tractor with the vehicle height raised, FIG. 2 is a rear view of the tractor with the vehicle height lowered, and FIG. 3 is a sectional view of the tractor with the front axle housing 19 adjusted higher relative to the front wheels 1. Fig. 4 is a side view, Fig. 5 is an enlarged sectional view of the rotating support part of the front wheel axle case 4 for adjusting the vehicle height, and Fig. 6 is the vehicle height adjustment device constructed in the rear axle housing of the tractor. 7 is a side view of the rear wheel axle case 33 when the vehicle height is raised, FIG. 8 is a front sectional view showing the support portion of the lowering lock pin 50, and FIG. 9 is a front sectional view of the rear wheel. FIGS. 10 and 11 are enlarged sectional views of the clutch device, and are axial sectional views showing the operating state of the rear wheel clutch device. C...Front wheel drive clutch device, M...Mission case, 1...Front wheel, 6...Front axle, 11...
Rear wheel, 29...clutch ball, 35...axle gear, 59...clutch shifter, 62...rear axle.

Claims (1)

[Scope of utility model registration request] The front axle case 4 rotates around a rotation shaft 5 that transmits power from the front axle shaft 18, and revolves around the rotation gear 7 fixed to the rotation shaft 5 while rotating together with the front axle case 4. Axle gear 8
, the axle gear 8 is fixed to a front wheel 6 pivotally supported on the front wheel axle case 4, the front wheel 1 fixed to the front wheel 6 is fixed so as not to be movable back and forth, and the front axle shaft 18 is rotated by the engine. By this,
The height of the front wheel 1 can be raised, and the rear axle shaft 4
7, and an axle gear 35 that rotates around the rotating gear 36 fixed to the rear axle shaft 47 and revolves together with the rear axle case 33. The gear 35 is fixed to a rear axle 62 that is pivoted to the rear axle case 33,
The rear wheel 11 fixed to the rear axle 62 is fixed so that it cannot be moved back and forth, and the rear axle shaft 47 is rotated by the engine, so that the vehicle height of the rear wheel 11 can be raised, and the front wheel axle case 4 is raised by the weight of the aircraft. In a configuration in which the rear wheel axle case 33 rotates around the rotating shaft 5 and the rear axle shaft 47 to lower the vehicle height of the front wheels 1 and the rear wheels 11, the power of the transmission case M is transferred to the front wheels. A vehicle height adjustment device for a running vehicle, characterized in that a rear wheel clutch device is installed, which transmits the information to the rear wheels, but does not transmit the information to the rear wheels.