JPS62143737A - Free wheel hub device - Google Patents

Abstract

PURPOSE:To facilitate shifting of 2-wheel drive to and from 4-wheel drive, by a method wherein a handle, rotatably mounted to a body, and a cam follower, engaged with an inner sleeve through slide of a clutch ring in linkage with the handle, are provided, and a motor for driving is coupled to the handle. CONSTITUTION:When a clutch ring 7 is in a state to be separate from an inner sleeve, with a switch turned to the forward rotation to drive a motor, a handle 12 engaged with a pinion gear 15 is rotated forward. As a result, a cam follower 10 is moved leftward, and a clutch 7 is also moved in the same direction and is engaged with an inner sleeve 6. As a result, an axle 33 is coupled to a wheel hub 32, and 4-wheel drive is practicable. As noted above, driving of the handle 12 with the aid of a motor 16 enables 2-wheel drive to be easily switched to and from 4-wheel drive through switch control in a driver seat.

Description

[Detailed Description of the Invention] [Object of the Invention] (Industrial Application Field) The present invention provides an axle A wheel hub that is interposed between an axle and a wheel hub that are rotationally driven only during four-wheel drive of a four-wheel drive vehicle. The present invention relates to a freewheel hub device that connects the wheels to enable power transmission.

(Prior art) As a prior art related to the present invention, for example, Utility Model Application No. 59-5
There is one described in Japanese Patent No. 1620. This consists of a body that is fixed to the outer end of a wheel rib that is rotatably assembled to the outer end of an axle tube, and a body that is connected within the body to the outer end protrusion of the axle that is inserted into the axle tube so that power can be transmitted. A clutch ring is attached to the body so as to be slidable in the axial direction, a handle is rotatably attached to the body, and the clutch ring is slid in the axial direction in conjunction with the handle to engage with the inner sleeve. It is a freewheel hub device consisting of a cam follower, and by manually rotating the handle, the clutch ring and inner sleeve are engaged to enable power transmission.

(Problems to be Solved by the Invention) In the above technology, the steering wheel is operated manually to convert power from two wheels to four wheels, so it is necessary to go outside the vehicle, and it is necessary to go outside the vehicle in bad weather or road conditions. Sometimes it's inconvenient.

[Structure of the Invention] (Means for Solving the Problems) The technical means taken to solve the above problems is to connect the handle to a motor that drives the handle.

(Function) Since the present invention is constructed as described above, the axle and the wheel hub can be connected and uncoupled by operating a switch by driving the handle by the motor, and can be easily done from the driver's seat, for example.

(Example) An example of the present invention will be described below based on FIGS. 1 to 4. In this freewheel hub device, the axle pipe 31
A cylindrical body 1 is fixed to the outer end of a wheel hub 32 which is rotatably assembled on the outer end of the wheel hub 32, and a plate 9 is disposed within the body 1.
．． The ring 4 is locked by the snap ring 5, and the axle 3
An inner sleeve 6 that rotates integrally with the ring 3 is rotatably supported by the ring 4. The handle 12 is rotatably supported by a bush 17 attached to a boss portion 2a of a cover 2 attached to the body 1. This handle 12
A cam surface 12b is formed on the circumference of the boss portion 12a. A cam follower 10 is installed on the outer periphery of the handle boss portion 12a, and its claw portion 10a is in contact with the cam surface 12b. The clutch ring 7 comes into contact with the cam follower 10.
There is. This clutch ring 7 is connected to its outer peripheral surface and to the body 1.
It is attached so that it can slide in the axial direction between the inner peripheral surface of the Clutch ring 7, cam follower 10, and cam follower 1
0 and the handle 2 are each tension spring 1.
3.11 is provided. The inner peripheral surface of the clutch ring 7 and the outer peripheral surface of the inner sleeve 6 are provided with splines 7a and 6a, respectively, which can engage with each other. A motor 16 with a shaft 16a is located within the side wall of the wheel hub 32 with a protrusion 16b.
It is fixed and prevented from rotating. shaft 16a
is provided with a pinion gear 15, and a gear 12C is provided on the outer periphery of the handle 12 so as to mesh with the pinion gear 15. A slip ring 34 connected to the motor 16 is attached to the wheel hub 32 .

A brush portion 18a that also serves as the lock plate 18 of the bearing 35 is attached to the axle tube 31.
Wiring is conducted from a to the axle pipe 31 so as to communicate with the control box 20 inside the vehicle. The control box 20 communicates with a power source battery 19 and a switch 21 on the driver's seat. The switch 21 is normal inversion 21a, reverse rotation 21b, and neutral 21c.
It is a three-point control.

When the switch 21 is turned to the forward rotation side 21a from the state in which the clutch ring 7 is separated from the inner sleeve 6 as shown in FIG. , the pinion gear 15 fitted to the shaft 16a rotates forward, and the pinion gear 1
5 rotates in the forward direction, and the pawl of the cam follower 10 moves (moves to the left in Fig. 1 and comes to the position indicated by the two-dot chain line in Fig. 3), so the clutch ring 7 also moves in the same direction. By engaging with the inner sleeve 6, the axle 33 and the wheel hub 32 are connected and four wheels can be driven.

When the clutch ring 7 and the inner sleeve 6 are engaged, when the switch 21 is turned to the reverse side 21b, power is supplied to the motor 16 via the slip ring 18, the shirt 16b rotates in the reverse direction, and the handle 12b also rotates in the reverse direction. Rotate.

The claw portion 10a of the cam follower 10 is moved along the cam surface 12b of the handle by the tension spring 11 in the axial direction (
However, a frictional force is generated between the clutch ring 7 and the inner sleeve 6 due to the torque, and the tension spring 11 and the tension spring 13 stop in a balanced state.

After this, when the vehicle moves and mutual rotation occurs between the axle 33 and the wheel hub 32, mutual rotation also occurs between the inner sleeve 6 and the clutch ring 7, which eliminates the frictional force between them. Tension spring 11.13
The clutch ring is moved in the axial direction (left direction in Figure 1).
, the engagement with the inner sleeve 6 is removed, and the two wheels become free, resulting in a two-wheel drive state.

By setting the switch 21 to the neutral position 21c, the motor 16 becomes de-energized and maintains either four-wheel drive or two-wheel drive set.

〔Effect of the invention〕

Previously, switching between two-wheel drive and four-wheel drive was done manually using a handle attached to the wheel, but by attaching a motor to a freewheel hub device, it is now possible to switch between two-wheel drive and four-wheel drive by operating a switch from the driver's seat. Since switching is also possible, effects such as prevention of erroneous operation when switching only the -wheel can be obtained.

[Brief explanation of drawings]

FIG. 1 is a sectional view of a freewheel hub device according to the present invention, FIG. 2 is a front view of FIG. 1, FIG. 3 is a view showing the profile of a cam surface, and FIG. 4 is an electric circuit diagram.

Claims (1)

[Claims] A body fixed to the outer end of a wheel hub rotatably assembled to the outer end of the axle tube, and connected to the outer end protrusion of the axle inserted into the axle tube inside the body so as to transmit power. an inner sleeve that is attached to the body so as to be slidable in the axial direction; a handle that is rotatably attached to the outer end opening of the body via a cover that is fixed to the outer end opening of the body; A freewheel hub device comprising a cam follower for sliding the clutch ring in the axial direction to engage the inner sleeve, the freewheel hub device comprising a motor for driving the handle connected to the handle.