KR100822727B1 - A differential apparatus of cars - Google Patents

Abstract

The present invention relates to a differential device of a vehicle to prevent idling by being configured such that any one of the left wheel and the right wheel does not have zero rotation speed, and is simple to manufacture and repair with a simple structure.

The present invention for realizing this is provided in a differential device in which a ring gear is installed on one side, the ring gear and the cam shaft are coupled to operate as one, and the cam shaft is provided with a polygonal column-shaped cam on both sides and a hollow portion is formed; A plurality of rollers provided around the cams; A cage installed oppositely on both sides of the camshaft and supporting the plurality of rollers on an isometric surface: a holder bar connecting the cages on both sides to operate integrally; An outer racer that surrounds the cage and the rollers on both sides and is installed to face each other and is coupled to rotate the axle integrally; And support plates that are installed between the cages and the outer racers on both sides to restrain or release the outer racers and are elastically supported by springs.

Description

Vehicle differentials {A DIFFERENTIAL APPARATUS OF CARS}

1 is a schematic cross-sectional view showing the configuration of an embodiment according to the present invention

2 is a partial perspective view of the camshaft of one embodiment according to the present invention;

3 is a perspective view of a cage assembly of one embodiment according to the present invention;

Figure 4 is a cross-sectional view showing the configuration of an embodiment according to the present invention

Figure 5 is a cross-sectional view showing the configuration of an embodiment according to the present invention

6 is a block diagram of an embodiment according to the present invention

7A to 7C are diagrams illustrating a variable operation state on the cross section along line A-A of FIG.

* Explanation of symbols for the main parts of the drawings

1: Differential Device A1 of the Vehicle of the Present Invention: Left Wheel A2: Right Wheel

10, 10A, 10B, 10C: Internal rotating body 11: Ring gear 12: Camshaft

12a: hollow portion 13: cam 14: base plate

15: outer cylinder 17: cover plate 20: roller

30: cage 33: hole 40: holder bar

50: outer racer 60: axle 71: support plate

73: spring 81: bearing

The present invention relates to a differential device of a vehicle to prevent idling by being configured such that any one of the left wheel and the right wheel does not have zero rotation speed, and is simple to manufacture and repair with a simple structure.

In general, when the vehicle is turning, the right wheel should rotate more than the left wheel, and the driving distance of the inner and outer driving wheels is different even when driving on a rough road.

The differential device of the vehicle is a device that transmits the driving torque of the same size to the inner and right wheels when the rotational speed of the inner and outer driving wheels is different. In the differential gearbox, which is integrally rotated with the gear, the differential pinions are arranged in pairs to face each other so that they can rotate freely.

In this configuration, if the wheel is rotated 100 rpm in the driving unit, both wheels are equally rotated 100 times in normal driving. However, if the rotational speed is different, for example, if the right wheel rotates 110, the left wheel rotates oppositely to the 10th and rotates 90 degrees. Therefore, when one side makes 200 revolutions, the other side has a rotation speed of zero.

That is, since torque of the same size is always distributed to the inner / right wheels and the driving torque is determined by the less adhesion to the road surface, when one side wheel loses the adhesion during slippery road driving such as ice or bog, Accordingly, the other wheels driving on the normal road surface do not receive the rotational force, so the vehicle has a problem in that it is impossible to move forward or backward.

The present invention has been made to solve the above problems,

SUMMARY OF THE INVENTION An object of the present invention is to provide a differential device of a vehicle which prevents an idle phenomenon by preventing the rotation speed of either one of the left wheel and the right wheel from being zero.

Another object of the present invention is to provide a differential device for a vehicle that is easy to manufacture and repair to reduce costs.

A differential device of a vehicle according to the present invention for achieving the above object,

In the differential device where the ring gear is installed on one side,

A ring gear and a cam shaft are coupled to be operated as one, and the cam shaft is provided with a cam having a polygonal pillar on both sides and an inner rotating body having a hollow portion;

A plurality of rollers provided around the cams;

Cages opposed to both sides of the camshaft and arranged to support the plurality of rollers on an equiangular side:

A holder bar for connecting the cages on both sides to operate integrally;

An outer racer that surrounds the cage and the rollers on both sides and is installed to face each other and is coupled to rotate the axle integrally; And

And a support plate installed between the cages and the outer racers on both sides to restrain or release the outer racers and be elastically supported by a spring.

Hereinafter, with reference to the accompanying drawings an embodiment of a differential device of the vehicle of the present invention will be described in more detail.

1 is a cross-sectional view schematically showing the configuration of an embodiment of a vehicle differential of the present invention, FIG. 2 is a partial perspective view of a camshaft of an embodiment according to the present invention, FIG. 3 is a cage assembly of an embodiment according to the present invention. Perspective view.

As shown in Figures 1 to 3, in the differential device 1 of the vehicle according to the embodiment of the present invention, in the differential device in which the ring gear is installed on one side, the ring gear 11 and the camshaft 12 are united as one. The camshaft 12 is operatively coupled and the camshaft 12 has an internal rotating body having a hollow portion 12a and polygonal cams 13 formed on both sides thereof, and a plurality of rollers installed around the cams 13 on both sides ( 20), a cage 30 opposed to the camshaft 12 and installed to support the plurality of rollers 20 on an isometric angle, and a holder bar connecting the cages 30 on both sides to operate integrally; 40, an outer racer 50 surrounding the cage 30 and the rollers 20 on both sides, and installed to face each other, and the axle 60 is integrally rotated, and the cage 30 and the outer racer 50 on both sides. Is installed between the support to restrain or release the outer racer 50 and is elastically supported by the spring (73) It is configured including 71.

The internal rotating body 10A of the embodiment according to the present invention may be formed by protruding and extending the cam shaft 12 from the base plate 14 on which one side of the ring gear 11 is installed. At this time, the camshaft 12 is positioned to be biased toward any one of the left side or the right side around the base plate 14, the weight flange 18 for load correction can be formed.

As shown in FIG. 4, the inner rotating body 10B according to the present invention includes a base plate 14 having a ring gear 11 installed at one side thereof and a side axle 60 penetrated therein, and the base plate. The camshaft (1) integrally coupled to (14), the camshaft being positioned with a space in which the plurality of rollers (20) and the outer racer (50) are installed between the outer cylinder (15) and the inner circumferential surface of the outer cylinder ( 12), the cover portion 17 which is coupled to the outer cylinder 15 and the other axle 60 penetrates against the track portion 16 connecting the outer cylinder 15 and the camshaft 12 and the base plate 14 to pass through. It may be configured to include).

At this time, it can be seen that the inner rotor (10B) is configured in the form of a differential gear box of the prior art.

As an embodiment of the present invention, as shown in FIG. 5, the hub 50A of the tire may be directly installed in place of the outer racer 50.

The polygonal columnar outer circumferential surface 13a of the cam 13 may be concave curved.

The cam 13 is preferably integrally operated with the camshaft 12 but detachably coupled to the camshaft 12. At this time, the camshaft 12 and the cam 13 may be spline-coupled to operate integrally with each other.

In addition, the cage 30 is preferably formed with a hole 33 for conforming the roller 20 is inserted into the cylindrical circumference is formed on one side.

The holder bar 40 may have a polygonal shape in which the coupling part 41 corresponds to each other so as to move integrally with the cage 30.

In addition, a bearing 81 is installed between the camshaft 12 and the outer racer 50.

As shown in FIG. 6, as shown in FIG. 6, the internal rotating body 10 has a first gear 11a, a second gear 11b, and a third gear instead of a ring gear on the camshaft 12. The gear 11c is coupled to rotate integrally and may be installed in the four-wheel drive power transmission transmission. Reference numeral 2 denotes a drive gear, and 12b and 13b are spline coupling portions, respectively.

It looks at the operating state of the differential device 1 of the vehicle according to the present invention having such a configuration.

The rollers 20 function as roller clutches that change into wedges depending on their position in the space between the inner rotor 10 and the body 13 and the cam 13.

In addition, the cage 30 supporting the roller 20 is elastically supported by the support plate 71 supported by the spring while being integrally coupled with the holder bar 40 to move.
The spring 73 and the support plate 71 are for forming a resistance force to prevent the cage 30 from turning together when the cam 13 rotates. If there is no spring and the support plate, the roller 20 may be positioned as a wedge. Cannot
That is, the spring 73 and the support plate 71 is used for the cage support, and the friction friction with the outer racer 50 is made of a lubricant and use a material of high wear resistance and irrelevant to power transmission.

At the moment of rotation of the inner rotor 10, the roller 20 starts to rotate in the state in which the roller 20 does not restrain the outer racer 50 (see FIG. 7A). And the cam 13 is pushed in opposite direction of rotation, and wedged between the cam 13 and the outer racer 50 so that the outer racer 50 is simultaneously rotated together with the inner rotor 10 (see FIG. 7B). .
Due to such an operation relationship, the left wheel A1 side and the right wheel A2 side are brought to the state of FIG. 7B when the straight line moves, and the left and right outer racers 50 are rotated at the same rotation ratio.
And, for example, when the left wheel cornering the left wheel to turn a short distance, the right wheel to turn a longer distance, the left wheel (A1) side of the roller 20 acts as a wedge similarly to the straight state to the out by the rotation of the inner rotor (10) While the racer 50 is rotated, the outer racer 50 of the right wheel A2 side is further idling as much as the difference between the left wheel side and the cornering is achieved.

delete

delete

This is because the roller 20 is idled in place as the right wheel side racer 50 is idling to release the restraint from the inner rotor 10. At this time, the outer racer 50 runs past the inner rotor 10. Over-run

However, by the cage 30, the two outer racers 50 of both the left wheel A1 and the right wheel A2 cannot run past the inner rotor 10 at the same time. That is, the overrun of the outer racer 50 occurs only on one side at a time, and cornering is performed at this time.

delete

In addition, when the engine breaks down or down the hill, when the accelerator is released, the speed of the inner rotor 10 decreases. This causes the roller 20 to move along the cam 13 and again to hold the outer racer 50 (see FIG. 7C).

Now the outer racer 50 can no longer run past the inner rotor 10. The left wheel A1 may slow down to change direction as needed while the right wheel A2 maintains a constant speed, so the left wheel A1 rotates at a lower speed than the right wheel A2.

Then, when the right wheel A2 rotates at 10 rpm, the left wheel A1 rotates at a lower speed, and cornering is performed.

In the present invention, for example, in the driving of the left wheel A1 and the right wheel A2 based on 10 rpm, the speed of the right wheel A2 increases while the left wheel A1 maintains the reference speed during acceleration. The speed of the left wheel A1 is decelerated while the right wheel A2 maintains the reference speed. This means that either of the wheels does not become zero rotation speed, for example, to prevent the vehicle from moving by preventing idling even when one driving wheel loses friction on the road surface.

The present invention is simpler to manufacture than the differential gear device of the conventional complicated configuration, and is easy to manufacture, especially when the cam 13 and roller 20 assemblies are directly mounted to the tire hub 50A (see FIG. 6). There is an advantage that can be repaired from the outside.

In addition, it is also effective to form a gear in the inner rotor 10 step by step as a four-wheel drive power transmission transmission (see Fig. 7).

In the above, preferred embodiments of the present invention have been described with reference to the accompanying drawings. Here, the terms or words used in the present specification and claims should not be construed as being limited to the common or dictionary meanings, but should be interpreted as meanings and concepts corresponding to the technical spirit of the present invention. Therefore, the embodiments described in the specification and the drawings shown in the drawings are only the most preferred embodiment of the present invention and do not represent all of the technical features of the present invention, which can be replaced at the time of the present application It should be understood that there may be various equivalents and variations.

As described in detail above, the differential device of the vehicle according to the present invention has an excellent effect of preventing the idle phenomenon by being configured so that the rotation speed of either one of the left wheel and the right wheel does not become a zero state.

In addition, since the structure is simple, the manufacturing and repair is easy to reduce the cost.

Claims (10)

In the differential device where the ring gear is installed on one side, A ring gear 11 and a cam shaft 12 are coupled to be operated as one, and the cam shaft 12 includes an internal rotating body in which a hollow portion 12a is formed and polygonal pillar-shaped cams 13 are provided at both sides; A plurality of rollers 20 installed around the both side cams 13; Cage 30, which is provided opposite to the cam shaft 12 on both sides and is arranged to support the plurality of rollers 20 on an equiangular: A holder bar 40 for connecting the cages 30 at both sides to operate integrally; An outer racer 50 surrounding the cages 30 and the rollers 20 on both sides thereof and facing each other and coupled to rotate the axle 60 integrally; And And a support plate (71) installed between the cages (30) on both sides and the outer racer (50) to restrain or release the outer racer (50) and be elastically supported by the spring (73). Differentials. The method of claim 1, The inner rotating body (10A) is a differential device of a vehicle, characterized in that the cam shaft 12 is formed to extend from the base plate 14, the ring gear 11 is installed on one side protruding to the left / right.  The method of claim 1, The inner rotating body 10B is provided with a ring gear 11 at one side and a base plate 14 through which one axle 60 penetrates, and an outer cylinder 15 integrally coupled to the base plate 14 and having a cylindrical shape. The cam shaft 12, the outer cylinder 15, and the cam shaft 12, which are positioned with a space in which the plurality of rollers 20 and the outer racer 50 are installed between the outer cylinder 15 and the inner circumferential surface thereof, are connected to each other. And a cover plate (17) coupled to the outer cylinder (15) facing the track portion (16) and the base plate (14) through which the other axle (60) penetrates.  The method of claim 1, Differential of the vehicle, characterized in that the hub (50A) of the tire is directly installed in place of the outer racer (50).  The method of claim 1, A polygonal pillar outer peripheral surface (13a) of the cam (13) is a vehicle differential, characterized in that the concave curved formed.  The method of claim 1, The cam (13) is operated integrally with the cam shaft (12), the differential of the vehicle, characterized in that the detachably coupled.   The method of claim 6, And the camshaft (12) and cam (13) are splined to be integrally operated with each other.  The method of claim 1, The cage 30 is a differential device for a vehicle, characterized in that the hole 33 for inserting the roller 20 is formed at a right angle around a cylindrical shape in which the curl 31 is formed at one side.  The method of claim 1, A differential device for a vehicle, characterized in that a bearing (81) is installed between the camshaft (12) and the outer racer (50).  The method of claim 1, The inner rotor 10 is coupled to the camshaft 12 so that the first gear 11a, the second gear 11b, and the third gear 11c are integrally rotated instead of the ring gear, and the four-wheel drive power transmission shift is performed. The vehicle differential characterized in that it is installed in the device.

Images