JPH08118987A - Hub clutch - Google Patents

Abstract

PURPOSE: To position a spring and ornament at a low cost without spoiling the attractive appearance of a cover by positioning the spring engaged in the recessed section which is made inside the cover and positioning the ornament by means of the projected section made outside the cover. CONSTITUTION: A ring-like groove 97 is made by being pressed at a portion contacting the shift spring 95 in the inside a cover 41. The shift spring 95 is positioned at its left end engaged with the groove 99 provided in a plate 75 and its right end 95 engaged with the groove 97 in the cover 41. In the back side of the groove 97 made by being pressed, a ring-like projection 101 is formed, and an ornament 105 is stuck in the recessed section surrounded by this projection 101. The shift spring 95 does not shift even if it receives vibration during running. This stabilizes the motion of a hub clutch, improving its reliability.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION This invention relates to four-wheel drive (4WD).
The present invention relates to a hub clutch that connects and disconnects a drive axle and wheels in a vehicle.

[0002]

2. Description of the Related Art A hub clutch is described in JP-A-2-200532. FIG. 5 shows a hub clutch 201 having a similar structure.

The hub clutch 201 moves and operates a drive gear 203 on the drive axle side and a slide gear 207 which can be engaged and disengaged with a housing 205 on the wheel side to connect and disconnect the drive axle and the wheels.

The slide gear 207 is driven by the shift spring 209 as shown in the lower half of FIG.
03 is moved to the connecting position between the housing 205 and
With the actuator 211, like the upper half of FIG.
It is moved to the connection release position.

The actuator 211 is a diaphragm 21.
3, the diaphragm 213 is sandwiched between a retainer 215 and a plate 217. The housing 205 is the housing body 21.
9 and a cover 221 screwed thereto, the shift spring 209 is arranged between the plate 217 and the cover 221. An ornament is attached to the outer end of the cover 221.

[0006]

However, the cover 22
Since the outer end portion of No. 1 is flat, the place where the ornament is attached cannot be determined, resulting in poor workability. Further, when the recess for positioning the shift spring 209 is pressed on the cover 221, a protrusion is formed on the entire outside of the cover 221, and the ornament is attached on the protrusion, so that the protrusion is further enlarged and the appearance is not good. Further, if such processing is performed by cutting, the cost becomes high.

Therefore, according to the present invention, the appearance of the cover fixed to the end of the housing is not impaired, the cost is low,
It is intended to provide a hub clutch capable of positioning a spring and an ornament.

[0008]

A hub clutch according to a first aspect of the present invention includes a housing main body connected to a wheel side, a cover fixed to an axle end side of the housing main body, and an ornament attached to an outer end portion thereof, and a drive axle. Side drive gear, a slide gear that is movable to a connection position that connects the housing body and the drive gear, and a connection release position that releases this connection, and a spring that urges the slide gear to one of the two positions, An operating means for moving the slide gear to the other of the two positions against the biasing force of the spring, a ring-shaped recess processed inside the cover and a ring-shaped projection processed on the back side thereof. The spring is engaged with the concave portion to be positioned, and the convex portion positions the ornament.

A hub clutch according to a second aspect of the present invention is the hub clutch according to claim 1, wherein the cover is made of a metal plate, and the concave portion and the convex portion are simultaneously pressed.

[0010]

In the hub clutch of each invention, a ring-shaped recess is formed on the inside of the cover, and a ring-shaped protrusion is formed on the back side (outside) of the cover, and the spring is engaged with the recess to position it. Position the ornament with the protrusion.

In this way, the respective positions prevent the displacement of the springs, stabilize the operation of the hub clutch, and facilitate the attachment work of the ornament. or,
Since the ornament is attached by using the concave portion surrounded by the convex portion, the overhang of the cover is kept low and the appearance is not impaired.

The second aspect of the present invention is a structure in which a concave portion and a convex portion are simultaneously pressed on a cover made of a metal plate, and the cost is low because cutting is not performed.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to FIGS. This embodiment has the features of the second invention. FIG.
Shows a cross section of the embodiment, and FIG. 4 shows a power system of a vehicle in which this embodiment is used. The left and right directions are this vehicle and Fig. 1,
The left and right directions in FIG. 2 are not shown for members and the like to which no reference numeral is given.

As shown in FIG. 4, this power system includes an engine 1, a transmission 3, a transfer 5, and a 2WD-4WD switching mechanism 7 arranged in the transfer 5.
Propeller shaft 9 on the front wheel side, front differential 11 (differential device on the front wheel side), front axles 13, 15, hub clutches 17, 19 in the embodiment, left and right front wheels 21, 23,
The rear wheel side propeller shaft 25, the rear differential 27 (rear wheel side differential device), the rear axles 29 and 31, the left and right rear wheels 33 and 35, and the like.

When the 2WD-4WD switching mechanism 7 and the hub clutches 17 and 19 are connected, the vehicle enters the 4WD state.

At this time, the driving force of the engine 1 is from the transmission 3 to the transfer 5 and the propeller shaft 25.
Is transmitted to the rear differential 27 via the
35. Further, the driving force of the engine 1 is transferred from the transfer 5 through the propeller shaft 9 to the front differential 1
1 and is distributed to the left and right front wheels 21, 23.

When the connection of the 2WD-4WD switching mechanism 7 is released, the front wheels 21, 23 are disconnected from the engine 1 side and the vehicle enters the 2WD state. At this time, hub clutch 1
The connection of 7 and 19 is also released, and vibration, noise, wear and the like of the front-wheel-side power transmission system due to accompanying rotation from the front wheels 21 and 23 are prevented.

Next, an embodiment will be described by taking the hub clutch 19 on the right front wheel 23 side as an example.

The housing 37 is composed of a cylindrical housing body 39 and a cover 41 screwed to the right end of the housing body 39, and is fixed to the wheel hub by bolts 43. An O-ring 4 for preventing air leakage between the housing body 39 and this wheel hub.
5 are arranged. The wheel hub is supported by bearings on the outer circumference of a hollow spindle, and this spindle is connected to the vehicle body via a suspension. or,
The wheel wheel of the front wheel 23 and the brake disc are fixed to the wheel hub with bolts.

The front axle 15 (driving axle) penetrates the spindle, and a drive gear 47 is spline-connected to the right end portion thereof. The axle 15 is supported on the inner circumference of the spindle via a bearing, and a seal for preventing air leakage is arranged between the axle 15 and the spindle. The drive gear 47 is supported on the inner circumference of the housing body 39 via a slide bearing 49 and a center plate 51. The center plate 51 prevents the tip of the axle 15 from swinging, and the centering between the drive gear 47 and the housing 37 is performed. Are doing

The center plate 51 is axially fixed by a retaining ring 53 and a step portion 55 on the housing body 39 side, and washers 61, 61 are interposed between the retaining ring 57 and the step portion 59 on the drive gear 47 side. Have been positioned.

A slide gear 65 is axially movably connected to the inner periphery of the housing 37 via a spline portion 63. The slide gear 65 can be engaged with and disengaged from the drive gear 47. When the slide gear 59 moves to a coupling position where it meshes with the drive gear 47, the hub clutch 19 locks and the front wheels 23 are coupled to the axle 15, and the slide gear 59 drives. When it moves to the free position where the engagement with the gear 47 is released, the hub clutch 19 becomes free, and the front wheels 23 are disengaged from the axle 15 to be in a free rotation state.

The spline portion 63 is provided with toothless portions at equal intervals in the circumferential direction, and the arm 69 of the retainer 67 penetrates these toothless portions. Both ends of the slide gear 65 are sandwiched by these arms 69 and are connected to the retainer 67.

A diaphragm 71 is airtightly fixed to the inner circumference of the housing body 39 by a core metal 73, and an inner edge portion of the diaphragm 71 is airtightly sandwiched between a retainer 67 and a plate 75. A flexible arm 77 is formed on the retainer 67, and a cylindrical portion 79 is formed on the plate 75. Retainer 67 and plate 75 are arms 77
The claw 81 provided at the tip of each of the two is engaged with the top portion 83 of the cylindrical portion 79 to be positioned with respect to each other.

The diaphragm 7 is provided inside the housing 37.
1, an actuator 85 (operating means) and an air chamber 87 are defined on the left and right sides thereof.

The air chamber 87 communicates with the outside through a screwing portion 89 between the cover 41 and the housing body 39.
A ring-shaped filter 91 is arranged between the cover 41 and the housing body 39, and an O-ring 93 is arranged between the filter 91 and the cover 41 to prevent foreign matter from entering the air chamber 87.

A shift spring 95 (spring) is arranged between the plate 75 and the cover 41, and biases the slide gear 65 to the connecting position via a retainer 67.

Air pressure (positive pressure) is sent to the actuator 85 from an engine-driven air pump via an air passage provided between the axle 15 and the spindle, an orifice provided in the spindle, and the like. When air pressure is sent to the actuator 85, the diaphragm 71 bends rightward against the urging force of the shift spring 95, and the slide gear 65 is moved to the connection release position. Further, when the pressure supply to the actuator 85 is stopped, the slide gear 65 is moved to the connecting position by the shift spring 95.

The cover 41 is made of a steel plate, and a ring-shaped groove 97 (recess) is press-worked inside the cover 41 at a position where it comes into contact with the shift spring 95. The left end of the shift spring 95 is a groove 99 provided in the plate 75.
And the right end is engaged with the groove 97 of the cover 41 so that both ends are positioned.

Further, as shown in the enlarged view of FIG.
The ring-shaped convex part 1 on the back side of the
01 is formed, and the ornament 105 is attached to the concave portion 103 surrounded by the convex portion 101.

Thus, the hub clutch 19 is constructed.

Due to the positioning as described above, the hub clutch 19 has the shift spring 9 even if it receives vibration during traveling.
5 does not cause the positional deviation, the operation is stable, and the reliability is improved. Further, since the groove 97 and the convex portion 101 are formed by pressing at once, and the cutting is not performed, the cost is low.

Further, since the sticking point is designated by the convex portion 101, the sticking operation of the ornament 105 becomes extremely easy. Moreover, by making the height h of the convex portion 101 lower than the thickness t1 of the ornament 105, the protrusion of the outside of the cover 41 is suppressed to a low level, and the appearance is not impaired.

The ornament is the ornament 10
It does not have to enter the concave portion 103 inside the convex portion 101 as shown in FIG.

FIG. 3 shows such an example, and the outer diameter of the ornament 107 is larger than the outer diameter d of the convex portion 101. The ornament 107 is the groove 1 provided on the pasting side.
Since it is guided by the convex portion 101 by 09, the attaching work is easy. Further, since the height h of the convex portion 101 is absorbed by the thickness t2 of the ornament 107, the outer appearance of the cover 41 is not impaired.

In the present invention, the cover may be molded using a plastic having high mechanical strength. Since the convex portion and the concave portion are formed at the same time when the whole is formed and are not processed by cutting, the cost is low.

Further, the cover may be formed of a cast component so as to have a convex portion and a concave portion. This makes it possible to position the spring and the ornament without performing secondary processing such as cutting or pressing.

The hub clutch is connected by operating means,
The connection may be released by a return spring (spring).

Further, in each of the above-mentioned embodiments, the operating means has been described as an actuator using pneumatic pressure.
It can also be applied to a mechanical hub clutch using a braking means, a cam mechanism, or the like.

[0040]

According to the hub clutch of the present invention, a ring-shaped recess is formed on the inside of the cover and a ring-shaped projection is formed on the back side (outside) of the cover, and the spring is engaged with the recess for positioning. Position the ornament with the protrusion. Therefore, the displacement of the spring is prevented, the operation of the hub clutch is stabilized, the attachment work of the ornament is facilitated, and the appearance of the cover is not impaired.

The second aspect of the present invention is low cost because the concave portion and the convex portion are simultaneously pressed on the cover made of a metal plate.

[Brief description of drawings]

FIG. 1 is a sectional view of an embodiment of the present invention.

FIG. 2 is an enlarged view of a main part of the embodiment shown in FIG.

FIG. 3 is a cross-sectional view showing another example of attachment of an ornament according to the present invention.

FIG. 4 is a skeleton mechanism diagram showing a power system of a vehicle in which the embodiment of FIG. 1 is used.

FIG. 5 is a cross-sectional view of a conventional example.

[Explanation of symbols]

 15 Drive Axle 19 Hub Clutch 39 Housing Main Body 41 Cover 47 Drive Gear 65 Slide Gear 85 Actuator (Operating Means) 95 Shift Spring (Spring) 97 Groove (Concave) 101 Convex 105,107 Ornament

Claims (2)

[Claims] 1. A housing body connected to a wheel side,
A cover fixed to the axle end side of the housing body and having an ornament attached to the outer end, a drive gear on the drive axle side, a connection position for connecting the housing body and the drive gear, and a connection release position for releasing this connection. A movable slide gear, a spring for urging the slide gear to one of the two positions, an operating means for moving the slide gear to the other of the two positions against the urging force of the spring, and the cover. A ring-shaped concave portion processed inside and a ring-shaped convex portion processed on the back side thereof, the spring is positioned by engaging with the concave portion, and the convex portion positions the ornament. Features hub clutch. 2. The hub clutch according to claim 1, wherein the cover is made of a metal plate, and the concave portion and the convex portion are simultaneously pressed.