KR100802945B1 - Swash plate type limited slip differential for vehicle - Google Patents

Abstract

A swash plate type differential brake device for a vehicle is provided to enable a user to effectively escape from a dangerous area by preventing one of wheels from being idly rotated. A ring gear(15) receives operational power from a transmission. A housing(12) is implemented in the ring gear. A hydraulic control valve is implemented to be opposed to the housing and connected to a hydraulic line, such that the hydraulic circuit valve is operated by hydraulic force. A left pump(4) is implemented at a left side from the ring gear and coupled with the ring gear. A left pump swash plate(1) is implemented in the left pump. A right pump(6) is implemented at a right side from the ring gear and coupled with the ring gear. A right pump swash plate(2) is implemented in the right pump. An axle(9) is arranged across the ring gear and the left and right pumps. The left and right pumps include a cover, a cylinder, and a piston. The cylinder is implemented in the cover. The piston is arranged to be reciprocally moved according to a slope of the left and right pump swash plates in the cylinder.

Description

Swash plate differential limiter for vehicles {SWASH PLATE TYPE LIMITED SLIP DIFFERENTIAL FOR VEHICLE}

1 is a cross-sectional view schematically showing the configuration of a swash plate differential limiter for a vehicle according to the present invention.

2 is a longitudinal cross-sectional view of FIG.

3 is a perspective view of the cover and axle of FIG.

4 is a schematic perspective view of the piston cylinder of FIG. 1;

5 is a perspective view of the control valve assembly of FIG. 1.

6 is a perspective view of the ring gear of FIG.

7 to 9 is an operation diagram schematically showing the operation of the swash plate differential limiter for a vehicle according to the present invention.

<Description of the symbols for the main parts of the drawings>

1. Left pump swash plate

2. Right pump swash plate

3. Left piston

3 '. Right piston

4. Left pump

5. Left pump cover

6. Right pump

7. Right pump cover

9. Axle

10. Hex Bolt

11. Hydraulic control valve

12. Housing

13. Right cylinder

14. Left cylinder

15. Ring Gear

16. Half Moon Joint

The present invention relates to a swash plate differential limiter for a vehicle, and more particularly, to a swash plate differential limiter for a vehicle for applying a hydraulic differential limiter without a clutch.

In general, the vehicle's inner and outer wheels must be rotated because the outer wheels of the surface must rotate faster than the inner wheels of the surface in order for the wheels to rotate smoothly without slipping when the vehicle travels on a curve. You need a differential to compensate for the difference.

That is, the differential device is used as an essential device for all vehicles in order to correct the difference between the inner and outer wheels of the curved surface when steering the steering wheel.

By the way, the vehicle having the differential device has a problem that the power transmission is not made smoothly when driving in a place where the friction, such as mud, sand, snow or ice is less, can not run.

In order to solve the above problems, the differential limiting device is provided in order to prevent the wheel from idling by limiting the differential action around the differential device.

In addition, the differential device is necessary when the vehicle is curved, but may interfere with driving. For example, if one of the wheels falls into the mud while driving, one of the wheels not falling into the mud receives resistance from the ground, and the wheels falling into the mud do not receive resistance.

Therefore, power is not transmitted to the wheels that are not in the mud, and only the wheels in the mud are idle, and the vehicle cannot run.

In such a case, if you stop the operation of the differential, you can easily get out of the mud. For this purpose, a differential limiter is provided to stop the operation of the differential.

However, current differential limiters for vehicles are complex and expensive. In addition, the Sure-grip differential limiter has the disadvantage that the oil is contaminated quickly using the LSD-only oil, and the non-spin differential limiter is attached to one wheel during operation noise and turning of the dog clutch. It has the disadvantage of transmitting power.

In addition, since the electronically controlled differential limiter brakes the wheel on which slip occurs, the brake generates heat and thus cannot be used for a long time.

The present invention was created in order to solve the above problems, by adopting a hydraulic differential limiting device that does not require a clutch, the structure is simple and the noise is low, so the non-spin type and Sure grip differential limiting device or electronically controlled differential limiting device. It is an object of the present invention to provide a swash plate differential limiting device for overcoming the shortcomings.

A swash plate differential limiter for a vehicle according to the present invention for achieving the above object comprises: a ring gear provided to receive power from a transmission; A housing installed in the ring gear; A hydraulic control valve installed opposite to each other on the housing and connected to the hydraulic line to be operated by hydraulic pressure; A left pump disposed at a left side of the ring gear and coupled to the ring gear; A left pump swash plate installed in the left pump; A right pump disposed at a right side of the ring gear and coupled to the ring gear; A right pump swash plate installed in the right pump; And the axle installed across the ring gear and the left and right pumps, wherein the left and right pumps include a cover, a cylinder installed in the cover, and an inclination of the left and right pump swash plates on the cylinder. It is characterized by including a piston installed to reciprocate.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 and 2 are a cross-sectional view and a longitudinal sectional view schematically showing the configuration of a swash plate differential limiting device for a vehicle according to the present invention, respectively, and Figs. 3 to 6 are each an external perspective view of the main component of Fig. have.

Referring to each of these drawings, the swash plate differential limiting device for a vehicle according to the present invention includes a ring gear 15 provided to receive power from a transmission, a housing 12 installed in the ring gear 15, and A hydraulic control valve 11 installed opposite to each other in the housing 12 and connected to a hydraulic line to be operated by hydraulic pressure, and a left pump 4 disposed on the left side of the ring gear 15 and coupled to the ring gear 15. And the left pump swash plate 1 installed in the left pump 4, that is, assembled with the left pump cover 5 to be described later, and disposed on the right side of the ring gear 15, The right pump spool 6, the right pump swash plate 2 which is installed in the right pump 6, that is, assembled with the right pump cover 7 to be described later, and the ring gear 15, the left and right pumps. And an axle 9 provided across (4, 6).

Accordingly, the hydraulic control valve assembly herein refers to an assembly of the housing 12 and the hydraulic control valve 11.

In this case, the left and right pumps 4 and 6 are installed to face the left and right pumps 4 and 6 so as to face each other, and the left and right pump covers 5 and 7 and the left and right pump covers. Left and right cylinders 14 and 13 provided in (5,7) and left and right cylinders installed to reciprocate by the inclination of the left and right pump swash plates 1 and 2 in the left and right cylinders 14 and 13. And pistons 3 and 3 '.

In addition, the left and right pump covers 5 and 7 are fastened to the ring gear 15 by, for example, a plurality of fixing hexagon bolts 10, as shown in FIG. 3, and the left and right cylinders 14. 13, the axle 9 is splined.

In addition, the left and right pump swash plates 1 and 2 are coupled to the left and right pistons 3 and 3 'by the half moon joint 16.

In the drawings, reference numeral 19 denotes a hydraulic oil passage (line).

Referring to the operation of the swash plate differential limiting device for a vehicle according to the present invention having the configuration as described above are as follows.

Referring again to the drawings, the swash plate differential limiter for a vehicle according to the present invention is a swash plate type differential limiting device, which receives power from a transmission of a vehicle and is transmitted to a ring gear 15, and the ring gear 15 is The left and right pump swash plate (1) drives the assembly of the left pump swash plate (1), right pump swash plate (2), left pump cover (5), right pump cover (7), bolt (10) and control valve (11). Pistons 3 and 3 'reciprocate by the inclination of 2 to generate hydraulic pressure.

In addition, the hydraulic oil is operated by moving along the hydraulic line of the hydraulic control valve 11 disposed between the left pump 4 and the right pump 6.

When the hydraulic control valve 11 interrupts the flow of hydraulic pressure, the differential is limited, and when the hydraulic control valve 11 is opened, the differential is made.

In addition, when the vehicle turns right, as shown in FIG. 8, the number of revolutions of the left wheel increases, so that the pressure of the hydraulic oil of the left pump 4 increases in the first groove 17, and moves to the right pump 6 to turn right.

And when the left turn, as shown in Figure 7, the number of revolutions of the right wheel is increased, the pressure of the hydraulic oil is increased in the right pump 6 in the first groove 17, the hydraulic oil moves to the left pump (4) to turn left. .

In addition, as shown in Figure 9, when driving straight, the pressure of the left pump 4 and the right pump 6 is balanced to go straight. That is, when going straight, since the pressure of the left pump 4 and the right pump 6 is balanced and there is no movement of hydraulic pressure, the left pump swash plate 1, the right pump swash plate 2, and the piston 3, 3 'are integral. And rotate together.

In the reverse direction, the first groove (positive pressure when going straight) 17 is changed to negative pressure, and the second groove (negative pressure when going straight) 18 is changed to positive pressure. Therefore, when the compression and suction are changed and the one wheel of the vehicle falls into a puddle or mud which does not take resistance, the hydraulic control valve 11 causes a fluid resistance, thereby making a differential limit.

That is, when going straight, the first groove 17, the piston (3, 3 ') to generate a force to the center to generate a positive pressure, the second groove (18) in the piston (3, 3') Negative pressure is generated due to the force to open out.

The hydraulic control valve 11 is opened by the centrifugal force when running at high speed, is open, and there is no differential restriction.

According to the present invention, the swash plate separate type differential limiting device is divided into the left pump swash plate 1 and the right pump swash plate 2 so that the hydraulic pressure is collected in the center, so that the flow rate is easy to control and the hydraulic line is short.

And since the swash plate separate type differential limiting device is returned by the swash plate (1,2), there is no need for a return spring, and since the center of gravity of the swash plate (1,2) acts in opposite directions to each other, there is no shaking phenomenon.

In addition, the swash plate separate type differential limiting device has the same center of gravity as the centers of gravity of the pistons 3 and 3 'also act in opposite directions.

As described above, the swash plate differential limiter for a vehicle according to the present invention has the following effects.

Since the gear is not employed, there is no noise caused by the gear as in the prior art, and the structure is simple because there is no clutch.

In addition, the one wheel is prevented from idling, and the escape of the rough road and the field is effective.

Although the present invention has been described with reference to one embodiment shown in the drawings, this is merely exemplary, and it will be understood by those skilled in the art that various modifications and equivalent embodiments are possible. Therefore, the true scope of protection of the present invention should be defined only by the appended claims.

Claims (4)

A ring gear provided to receive power from the transmission; A housing installed in the ring gear; A hydraulic control valve installed opposite to each other on the housing and connected to the hydraulic line to be operated by hydraulic pressure; A left pump disposed at a left side of the ring gear and coupled to the ring gear; A left pump swash plate installed in the left pump; A right pump disposed at a right side of the ring gear and coupled to the ring gear; A right pump swash plate installed in the right pump; And axles installed across the ring gear and the left and right pumps. At this time, the left and right pumps, With the cover, A cylinder installed in the cover, And a piston installed on the cylinder to reciprocate as much as the inclination of the left and right pump swash plates. The method of claim 1, The cover is a swash plate differential limiting device, characterized in that fastened to the ring gear by a bolt. The method of claim 1, The swash plate differential limiting device, characterized in that the axle is splined to the cylinder. The method of claim 1, The left and right pump swash plate is a swash plate differential limiting device, characterized in that coupled to the piston by a half moon joint.

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