JPS6325223Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE PRESENT DISCLOSURE The present invention relates to an internal wiring structure in a freewheel hub mechanism of an all-wheel drive axle.

In recent years, freewheel hub mechanisms installed in all-wheel drive vehicles that automatically operate during all-wheel drive have been put into practical use. In the case of such a freewheel hub mechanism, the operating state of the mechanism is of great concern to the user, and it would be very convenient if there was some kind of display device. For this purpose, an electric switch is installed inside the axle hub to detect the movement of the freewheel hub mechanism, and an electric wire is routed through the vehicle frame and body to the instrument panel, and a lamp installed on the instrument panel is installed. Something that lights up has been devised.

However, there is a drawback in that it is quite difficult to rationally route the electric wires in the vicinity of the wheel, where vibrations are intense, taking into account durability and the influence of rotating parts.

In view of the above-mentioned drawbacks, the present invention aims to provide an internal wiring structure that allows highly durable wiring without requiring much modification to the freewheel hub mechanism.

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

First, in FIGS. 1 and 2 showing the first embodiment, there are bolts 1 around the outer periphery of the drive shaft 1.
5 is provided with a spindle 14 attached to a knuckle 16, and the axle hub 2 is mounted on the spindle 14 with a tapered roller bearing 3.
It is rotatably supported via. Note that when the drive shaft 1 is in two-wheel drive, power transmission from the engine side within the transmission is cut off.

A wheel 4 is attached to a flange portion 2a of the axle hub 2 with hub bolts 5 and nuts 6.

Next, to explain the automated freewheel hub mechanism, a clutch housing 7 and a clutch cover 8 are provided on the outer end surface of the axle hub 2.
and are attached by bolts 9. A predetermined portion of the inner circumferential surface 7a of the clutch housing 7 is formed to be slightly eccentric, and is configured to engage with a roller 12, which will be described later, when it moves to the left.

An inner hub 10 is attached to the drive shaft 1, and a roller 12 rotatably held by a roller cage 11 is interposed between the inner hub 10 and the clutch housing 7 so as to be movable in the axial direction. has been done. The right end portion of the roller cage 11 is loosely inserted into a recess 13a of a hub ring 13 attached to the inner hub 10.
Note that a projection (not shown) for pushing the roller cage 11 to the left in the drawing is formed in the recess 13a of the hub ring 13.

A lock nut 21 for holding the roller cage 11 is provided on the left side of the roller cage 11. This lock nut 21 is screwed onto the right end of the spindle 14, and the switch 17 is held by the lock nut 21 and a retaining ring 22 screwed onto the spindle 14. The contact piece 17a of the switch 17 is connected to the opening 2 provided in the lock nut 21.
It projects through 1a. The contact piece 17a is configured to be pushed by the roller cage 11 via the friction plate 23.

In this example, the electric wire 18 connected to the switch 17 is connected to an indicator light provided on an instrument panel (not shown) through an opening 16a provided in the spindle 14 and the knuckle 16.

That is, as shown in FIG. 2, a recess 14a is provided in the inner peripheral surface of the spindle 14 in the axial direction.
Further, an opening 19 is provided diagonally through the left side of the spindle 14. The electric wire 18 is buried in the recess 14a with adhesive or putty, and is led out through the opening 19. For this reason, the electric wire 18 will not vibrate and break, or become entangled in rotating members such as the drive shaft 1. 20 is a bushing for protecting electric wires.

In the above configuration, when all-wheel drive driving is performed, the drive shaft 1 is connected to the engine side by the transmission and starts rotating. Then, rotation is transmitted from the inner hub 10 rotating together with the drive shaft 1 via the rollers 12, and the roller cage 11 starts rotating. However, since the roller cage 11 is prevented from rotating by the friction plate 23, it rotates at a slower speed than the rotation speed of the inner hub 10. Therefore, due to this relative speed difference, the hub ring 1 rotates at the same speed as the inner hub 10.
The protrusion provided in the recess 13a of No. 3 moves to the position where it pushes the roller cage 11 and pushes it to the left. Then, as the roller cage 11 moves, the roller 12 is positioned at an eccentric portion formed on the inner circumferential surface of the clutch housing 7 and engages between the inner hub 10 and the inner circumferential surface of the clutch housing 7, and the drive shaft 1 The rotation is transmitted to the wheel 4 via the clutch housing 7 and the axle hub 2. At the same time, as the roller cage 11 moves to the left, the contact piece 17a is pushed and the switch 17 is turned on.
A lamp provided on an instrument panel (not shown) lights up via an electric wire 18 buried in the electric wire 4a to notify the driving vehicle that the freewheel hub has been activated.

Next, the second implementation row of the wiring structure of the electric wire 18 will be described. In this second embodiment, the spindle 1
A hole 14b is provided axially through the inside of 4, and an electric wire 18 is placed in this hole 14b.
Therefore, the electric wire 18 is completely buried within the spindle 14, and there is no interference from the outside, and there is almost no chance of the electric wire being broken due to vibration or the like. In addition, other configurations and functions are described in Part 1.
Since it is similar to the embodiment, the same number is given and the explanation thereof will be omitted.

Next, a third example of the wiring structure of the electric wire 18 will be described. In the case of this third embodiment, the electric wire 18 is embedded in a groove 14c recessed in the axial direction on the outer circumferential surface of the spindle 14 using adhesive, putty, or the like. In the case of this third embodiment, since the groove 14c is formed on the outer circumferential surface of the spindle 14, it is advantageous in that it is easy to process.

Note that the other configurations and operations are the same as those of the first embodiment, so the same reference numerals are given and the explanation thereof will be omitted.

In any of the embodiments, the holes and grooves for passing the wiring are not limited to those provided at the upper position of the spindle, as shown in each figure, but may be provided below.

As is clear from the above explanation, the present invention has a rotatable drive shaft that transmits driving force to the wheels, in which a spindle fixed to a nut is loosely inserted on the outside, and an axle hub on the outside of this spindle. In a rotatably arranged freewheel hub mechanism of an all-wheel drive axle, a switch means for detecting on/off of the freewheel hub mechanism is fixed to the tip of the spindle, and electrical wiring connected to the switch means. In order to avoid interference with the drive shaft and axle hub, which are rotating bodies, the wiring structure is such that the wiring is passed through a guide path such as a hole or groove formed along the axial direction of the spindle, which is a fixed body.

Therefore, according to the above structure, the wiring from the switch means is routed through the hole or groove of the spindle, which is a fixed body sandwiched between the drive shaft, which is a rotating body, and the axle hub.
Interference from both rotating bodies can be avoided, and the problem of wire breakage caused by entanglement by the rotating bodies can be eliminated. Further, when the wiring is passed through the guide path, the wiring can be securely fixed by using an adhesive or the like, and disconnection due to vibration or the like can be avoided.

[Brief explanation of the drawing]

Fig. 1 is a sectional view showing the first embodiment of the present invention, Fig. 2 is a sectional view taken along the line A-A in Fig. 1, Fig. 3 is a sectional view showing the second embodiment of the invention, Fig. 4 is B in Figure 3.
5 is a sectional view showing a third embodiment of the present invention, and FIG. 6 is a sectional view taken along line C--C in FIG. 5. 1... Drive shaft, 2... Axle hub, 14... Spindle, 14a, 14c...
Groove, 14b...hole, 17...switch, 18...
Electric wire, 19...opening, 24...bearing housing.

Claims (1)

[Scope of utility model registration request] A spindle fixed to a nut is loosely inserted on the outside of a rotatable drive shaft that transmits driving force to the wheels, and an axle hub is rotatably arranged on the outside of this spindle to form an all-wheel drive axle. In the freewheel hub mechanism, a switch means for detecting on/off of the freewheel hub mechanism is fixed to the tip of the spindle, and electrical wiring connected to the switch means is connected to the drive shaft and the axle hub, which are rotating bodies. Internal wiring in a freewheel hub mechanism of an all-wheel drive axle, which is characterized by passing through a guide path such as a hole or groove formed along the axial direction of the spindle, which is a fixed body, in order to avoid structure.