KR19980058615A - Auto hub lock device using one-way clutch and helical gear - Google Patents

Abstract

The structure is not complicated, making it easy to make, and the probability of failure is not only low, so that the vehicle does not need to be reversed when switching the driving state, and is fixed to the inner circumferential surface of the hub and has a first helical gear formed on one side of the through hole and inner circumferential surface. A second one-way clutch having a second helical gear fixed to an inner circumferential surface of the hub and spaced apart from the first one-way clutch by a predetermined interval, and having a second helical gear formed on one side of the through hole and the inner circumferential surface, and a guide portion formed in the longitudinal direction on the outer circumferential surface of the rotating shaft inserted into the through hole. And a ring clutch movably coupled to a guide portion between the first one-way clutch and the second one-way clutch, and having a third helical gear formed on the outer circumferential surface thereof to be bitten by the first helical gear or the second helical gear according to circumstances. Of the automatic hub lock device using one-way clutch and helical gear invent.

Description

Auto hub lock device using one-way clutch and helical gear

The present invention relates to an auto hub lock device using a one-way clutch and a helical gear, and in particular, by using a one-way clutch and a helical gear to be applied between a front axle and a hub of a vehicle to enable four-wheel drive or two-wheel drive operation as necessary. It relates to an auto hub lock device.

In general, there are two-wheel drive vehicles that drive by driving rear wheels and four-wheel drive vehicles that drive by driving both front and rear wheels. The four-wheel drive vehicle is applied to various jeep vehicles because of its complicated power transmission system and excellent driving performance on rough roads.

Four-wheel drive vehicles are advantageous in terms of fuel efficiency, and vehicles are being developed in which two-wheel drive or four-wheel drive can be selected as needed to increase durability of each gear device (front differential and transfer case). This requires a device that allows selective transmission of power between the front axle and the hub. Developed by this need is an auto hublock device.

FIG. 1 is a sectional view showing a conventional auto hub lock device, and FIG. 2 is a sectional view showing a state where the first clutch ring clutch is bitten by the inner drive gear, and the hubs 10 are shown in FIGS. It is. The hub 10 is a part connected to the wheel of the vehicle and has a cylindrical hollow space 12 therein. This hub 10 is adapted to be coupled with the front axle 20. The front axle 20 receives the power of the engine and transmits the power to the hub 10. An inner driver gear 30 is coupled to the end of the front axle 20.

One side between the hub 10 and the front axle 20 is provided with a moving cam 42 and a fixed cam 44. The front of the cam follower 46 is provided with a clutch cage 48 to move left and right, and a cage spring 50 and a ring clutch 52 are installed inside the clutch cage 48. have. In front of it, the cap 54 is coupled to the clutch cage 48. The clutch cage 48 is supported by the main spring 56.

1 shows a two-wheel drive state, in which the front axle 20 is not driven and the front axle 20 and the hub 10 are not constrained to each other in both forward and reverse directions. This is because the first degree ring clutch 52 and the inner drive gear 30 do not bite each other.

2 is a four-wheel drive state, the front axle 20 is rotated in a predetermined direction by receiving the power of the engine, the front axle 20 and the hub 10 by the driving (rotation) of the front axle 20 ) Are bound to each other. This is because the second degree ring clutch 52 is moved toward the inner driver gear 30 and is bitten together. The process is that when the front axle 20 starts to rotate, the cam follower 46 moves up and down the ramp of the fixer cam 44, compressing the cage spring 50 to drive the ring clutch 52 to the inner drive gear ( By moving to 30). That is, in this case, the power of the front axle 20 is transmitted to the hub 10 by the ring clutch 52.

In order to switch from the second degree state to the first degree state, that is, from the four-wheel drive forward state to the two-wheel drive forward state, the vehicle must be stopped and then moved at least 3 m backward. This is because the cam follower 46 has to descend the inclination of the fixer cam 44 to create a state in which the ring clutch 52 can be returned to its original position by the main spring 56. Only then can the ring clutch 52 return to its initial state, that is, the first degree state.

As described above with reference to FIGS. 1 and 2, the conventional auto hub lock apparatus has a disadvantage in that the vehicle has to be reversed by more than 3 m when switching from the four-wheel drive forward state to the two-wheel drive forward state. In addition, the structure is very complex, difficult to make, and likely to break.

An object of the present invention is to provide an auto hub lock device that is easy to make the structure is not complicated, low probability of failure, and also does not require the reverse of the vehicle when switching the driving state.

1 is a cross-sectional view showing a conventional auto hub lock device,

2 is a cross-sectional view showing a state in which the first degree ring clutch is bitten by the inner drive gear,

3 is a cross-sectional view showing an auto hub lock device using a one-way clutch and a helical gear according to the present invention;

4 and 5 show examples of one-way clutches,

6 is a perspective view showing a one-way clutch applied to the present invention,

7 is a view for explaining the characteristics of the helical gear,

8 and 9 are views for explaining the principle of applying the helical gear to the present invention,

10 is a view for explaining the operation relationship between the ring clutch and the one-way clutch,

11 is a view for explaining the two-wheel drive in the vehicle advanced state,

12 is a view for explaining the four-wheel drive in the vehicle forward state,

13 is a view for explaining the two-wheel drive in the vehicle reverse state,

14 is a view for explaining the four-wheel drive in the vehicle reverse state,

15 is a view for explaining the operation in the reverse conversion process before the four-wheel drive.

＊ Explanation of symbols on main parts of drawing

110: hub, 112: empty space, 114: bearing, 120: rotating shaft, 122: guide portion, 130: first one-way clutch, 132, 142: through hole, 134: first helical gear, 140: second one-way clutch, 144: second helical gear, 150: ring clutch, 152: third helical gear

An object of the present invention is installed between the hub, the rotary shaft for transmitting the rotational power to the hub in the auto hub lock device for connecting so as to transfer the power of the rotary shaft to the hub as needed, fixed to the inner peripheral surface of the hub A first one-way clutch having a first helical gear formed at one side of the through hole and the inner circumferential surface, and a second one-way clutch having a second helical gear formed at one side of the through hole and the inner circumferential surface and fixed to the inner circumferential surface of the hub at a predetermined distance from the first one-way clutch. The guide portion formed in the longitudinal direction on the outer peripheral surface of the rotary shaft inserted into the through hole and the guide portion between the first one-way clutch and the second one-way clutch movably coupled to the outer circumferential surface to the first helical gear or the second helical gear according to the situation. The physics comprise a ring clutch having a third helical gear formed thereon It can be achieved by the automatic hub locking device with the clutch face and the helical gear.

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

3 is a cross-sectional view showing an auto hub lock device using a one-way clutch and a helical gear according to the present invention.

Hub 110 is shown in FIG. This hub 110 is a part connected to the wheel of the vehicle. A predetermined empty space 112 is formed inside the hub 110. The shaft 110 is coupled to the hub 110 by a bearing 114. This rotating shaft 120 is a portion corresponding to the front axle. The rotary shaft 120 is for transmitting the rotational power to the hub 110 according to the situation.

As shown, the first one-way clutch 130 is fixed to one side of the inner circumferential surface of the hub 110. The first one-way clutch 130 is formed with a through hole 132, and has a first helical gear 134 formed on one side of the inner circumferential surface. The first one-way clutch 130 is a forward one-way clutch.

The second one-way clutch 140 is fixed to the inner circumferential surface of the hub 110 by being spaced apart from the first one-way clutch 130 by a predetermined interval. The second one-way clutch 140 also includes a through hole 142, and a second helical gear 144 is formed on one side of the inner circumferential surface thereof. The second one-way clutch 140 is a reverse one-way clutch.

As shown in Fig. 3, a guide portion 122 is formed on the outer peripheral surface of the end of the rotary shaft 1200 inserted into the through holes 132 and 142 of the first and second one-way clutches 130 and 140. As the reference numeral 122, a spline formed in the longitudinal direction of the rotation shaft 120 is suitable.

The ring clutch 150 is coupled to the guide portion 122 formed on the outer circumferential surface of the rotation shaft 120 between the first one-way clutch 130 and the second one-way clutch 140. The ring clutch 150 is coupled to move along the guide portion 122. The ring clutch 150 has a third helical gear 152 that is selectively bitten by the first helical gear 134 or the second helical gear 144 according to the situation.

4 and 5 show examples of the one-way clutch. 4, the one-way roller clutch 160 is shown. The one-way roller clutch 160 forms a dividing groove 166 gradually narrowed toward one side between the driving unit 162 and the driven unit 164 as shown, and the roller 168 in the dividing groove 166. It consists of an inserted configuration. That is, when the driving unit 162 rotates in one direction, the roller 168 moves to the narrow portion of the dividing groove 166 to serve as a wedge, so that the driven unit 164 also rotates in the same direction as the driving unit. On the contrary, when the driving unit 162 rotates in the other direction, the roller 168 moves to the wider portion of the dividing groove 166, so that the driven unit 164 is free to the driving unit 162.

5, the one-way ratchet clutch 170 is shown. The one-way ratchet clutch 170 has a configuration in which a tooth 173 is formed on the inner circumferential surface of the driving unit 172 and a ratchet 176 is supported on the driven unit 174 by the elastic member 175. . Also, when the driving unit 172 rotates in one direction, the driven unit 174 also rotates in the same direction as the driving unit 172, and when the driving unit 172 rotates in the other direction, the driven unit 174 moves in the driving unit 172. To be free to. That is, the driven part 174 is designed to be rotated in only one direction.

6 is a perspective view showing a one-way clutch applied to the present invention. 6, the one-way clutch 180 has a substantially cylindrical shape and has a through hole 182. A helical gear 184 is formed on the inner circumferential surface of the one-way clutch 180. The outer circumferential surface of the one-way clutch 180 is a portion fixed to the inner circumferential surface of the third degree hub 110. The one-way clutch 180 may be used as the third, first and second one-way clutches 130 and 140.

7 is a view for explaining the characteristics of the helical gear. In general, the use of the helical gear is the same as the spur gear, and when the number of teeth is small, the bite is made much smoother, so even a pitch circle of the same size can use a larger tooth than the spur gear, so it can transmit a large power compared to the size. Also, almost no noise is generated at high speeds. In this helical gear, as shown in FIG. 7, as the teeth bite each other, the thrust that pushes the gear 190 toward the axis 192 is generated. In general, when the torsional angle (β) is large, the thrust is also large. In general, in a helical gear, if W is a rotational force, its torsion angle is β, and a thrust is W _t , then W _t = Wtantan.

The invention utilizes thrust which is suitable for high speed rotation, which is an advantage of helical gears, and can transmit large power, and which is generally considered to be a disadvantage.

8 and 9 are diagrams for explaining the principle of applying the helical gear to the present invention. As shown in the figure, the helical gear 184 is formed on one inner circumferential surface of the one-way clutch 180, and the rotary shaft 120 is eighth in a state where the helical gear 152 is formed on the outer circumferential surface. As shown in FIG. 1, when the one-way clutch 180 is in a fixed (stopped) state or when the rotation speed is slower than the rotation shaft 120, the thrust is generated in the direction indicated by the arrow so that the ring clutch 150 is one-way clutch ( 180) firmly coupled. On the contrary, when the rotation shaft 120 is rotated in the opposite direction as shown in FIG. 9, the thrust is also generated in the opposite direction from the beginning. Accordingly, the ring clutch 150 is separated from the one-way clutch 180. That is, when the helical gear is used, the ring clutch 150 is automatically firmly coupled to or separated from the one-way clutch according to the rotation direction of the rotation shaft 120.

10 is a view for explaining the operation relationship between the ring clutch and the one-way clutch. As shown in FIG. 10, the guide shaft 122 is formed on the rotary shaft 120, and the ring clutch 150 having the helical gear 152 is formed on the outer circumferential surface of the rotary shaft 120. It is coupled to move in the direction. In this state, when the ring clutch 150 moves toward the one-way clutch 180 and is coupled to the helical gear 184 formed on the inner circumferential surface of the one-way clutch 180, the ring clutch 150 is mutually in accordance with the rotation direction of the rotation shaft 120. Under different directions, they are firmly coupled to each other or disengaged. In the apparatus of the present invention using this principle, the operation can be largely divided into three modes.

First, the operation is performed in the forward state of the vehicle, which is divided into two-wheel drive state and four-wheel drive state again.

Second, the operation is performed in the reverse state of the vehicle, which is also divided into two-wheel drive state and four-wheel drive state.

Third, the operation is performed in the forward and backward conversion process, which is divided into the forward and backward conversion operation in the two-wheel drive state and the forward and backward conversion operation in the four-wheel drive state. This will be described in more detail by dividing each mode.

FIG. 11 is a diagram for explaining two-wheel drive in the vehicle forward state, and FIG. 12 is a diagram for explaining four-wheel drive in the vehicle forward state. In the forward two-wheel drive state as shown in FIG. 11, the rotation shaft 120 does not rotate in any direction. In this state, the ring clutch 150 is coupled to the first one-way clutch 130. The first one-way clutch 130 is a forward one-way clutch, and the hub 110 rotates in the direction in which the vehicle moves forward, so that the vehicle can move forward in the two-wheel drive state.

In the forward four-wheel drive state as shown in FIG. 12, the rotation shaft 120 rotates in the direction indicated by the arrow. In this state, the ring clutch 150 is coupled to the first one-way clutch 130. The first one-way clutch 130 is a forward one-way clutch, and since the hub 110 does not allow the hub 110 to rotate in the direction in which the vehicle moves backward, the hub 110 receives the power of the rotation shaft 120 and the rotation shaft 120. Rotate in the same direction as Accordingly, the vehicle can move forward in the four-wheel drive state.

FIG. 13 is a view for explaining two-wheel drive in a vehicle reverse state, and FIG. 14 is a view for explaining four-wheel drive in a vehicle reverse state. In the reverse two-wheel drive state as shown in FIG. 13, the rotation shaft 120 does not rotate in any direction. In this state, the ring clutch 150 is coupled to the second one-way clutch 140. The second one-way clutch 140 is a one-way clutch for reversing, and allows the hub 110 to rotate in a direction in which the vehicle reverses, so that the vehicle can reverse in a two-wheel drive state.

As shown in Fig. 14, in the reverse four-wheel drive state, the rotation shaft 120 rotates in the direction indicated by the arrow. In this state, the ring clutch 150 is coupled to the second one-way clutch 140. Since the second one-way clutch 140 is a one-way clutch for reversing and does not allow the hub 110 to rotate in the direction in which the vehicle moves forward, the hub 110 receives the power of the rotation shaft 120 and receives the rotation shaft 120. Rotate in the same direction as Accordingly, the vehicle can be reversed in the four-wheel drive state.

15 is a view for explaining the operation in the reverse conversion process before the four-wheel drive. When reversing in the four-wheel drive forward state as shown in FIG. 12, the rotating shaft 120 rotates in the opposite direction to the beginning. Accordingly, the ring clutch 150 is coupled to the second one-way clutch 140 by receiving the relative reaction force and the thrust caused by the helical gear due to the difference in the rotational direction between the rotary shaft 120 and the front tire (hub side). This is the same state as shown in FIG. 14 and the vehicle is reversed in the four-wheel drive state.

The conversion process from the four-wheel drive backward state as shown in FIG. 14 to the four-wheel drive forward state in FIG. 12 is the reverse process described above. In the two-wheel drive state, the operation principle is the same as in the four-wheel drive state.

That is, the auto hub lock device using the one-way clutch and the helical gear according to the present invention automatically couples the rotating shaft and the hub to suit the mode in all modes.

As can be seen from the above description, when the auto hub lock device using the one-way clutch and the helical gear according to the present invention is used, there is no need to reverse the vehicle when switching the driving state. In addition, its configuration is much simpler than the conventional one, making it easy to make and excellent durability. In addition, by using the helical gear, it is possible to obtain an effect that noise does not occur even when driving at a high speed without excessive force to transmit a large power.

Claims (2)

In the hub, the auto hub lock device for connecting the hub so that the rotational power for transmitting the rotational power is connected to the hub so as to transmit the power of the rotation shaft, if necessary, A first one-way clutch fixed to an inner circumferential surface of the hub and having a first helical gear formed at one side of a through hole and an inner circumferential surface thereof; A second one-way clutch fixed to an inner circumferential surface of the hub at a predetermined interval apart from the first one-way clutch and having a second helical gear formed at one side of a through hole and an inner circumferential surface thereof; A guide part formed in a longitudinal direction on an outer circumferential surface of the rotation shaft inserted into the through hole; And A ring clutch movably coupled to the guide portion between the first one-way clutch and the second one-way clutch and having a third helical gear formed on the outer circumferential surface thereof, the third helical gear biting the first helical gear or the second helical gear according to circumstances; Auto hub lock device using a one-way clutch and helical gear, characterized in that. The method of claim 1, wherein the guide portion is an auto hub lock device using a one-way clutch and helical gear, characterized in that the spline.