JPS637522Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a shaft sealing device for a suspension plate spring support portion of a vehicle.

[Prior Art] As shown in FIG. 1, a suspension system using a leaf spring has a connecting pin attached to one of brackets 3 and 4 that fixedly support the eye 6 at one end of the leaf spring 10 at the front and rear of the chassis frame 2. At the same time, the centerpiece 6 at the other end is connected to the shackle 7 by a connecting pin 5, and the shackle 7 is supported by the other bracket 4 by a connecting pin 8.

The stacked leaf springs 10 have a pad 13 on the upper side of the center and an axle 14 with an I-shaped cross section that supports the wheel on the lower side, and the U bolts 9 that sandwich both side edges of these are placed on the flange of the axle 14. It is inserted into the bolt hole and fastened with a nut.
A stopper 12 such as a rubber block that can abut against the lower surface of the chassis frame 2 is connected to the pad 13 to prevent excessive deflection of the leaf spring 10.

As shown in FIG. 2, a pair of left and right parallel walls 3a of the bracket 3 are provided with holes through which the connecting pins 5 are inserted. The connecting pin 5 is fixed to the wall 3a by tightening a bolt 17 that crosses the groove 15 provided at the lower edge of the hole.

The support portion of the leaf spring 10 is often exposed to muddy water, dust, etc. thrown up by the wheels, and it is necessary to protect the fitting portion between the connecting pin 5 and the centerpiece 6 of the leaf spring. Furthermore, it is desirable to prevent the hitting noise caused by the eyeball 6 colliding with the wall 3a of the bracket due to lateral loads such as when the vehicle turns.

Conventionally, as shown in FIG. 3, in order to seal the fitting portion between the connecting pin 5 and the eyelet 6,
A metal-wound bushing 18 is fitted into the bushing 18, and a thrust seat plate 16 made of metal or synthetic resin is interposed between the wall portion 3a and the end face of the eyeball 6.
A connecting pin 5 passing through the thrust seat plate 16 is fixed to the wall portion 3a. A passage 19 extends from the end of the connecting pin 5 to the fitting part between the bush 18 and the connecting pin 5.
Grease is supplied through the

However, this is because the edge 6a of the leaf spring 10 (Fig. 1)
As a result, the thrust seat plate 16 is worn out, and dust and the like easily enter the circumferential surface of the connecting pin 5 from this part. Further, dust and the like easily enter the fitting portion between the connecting pin 5 and the bush 18 through the slot 15 in the wall portion 3a of the bracket, through the pin hole in the thrust seat plate 16. Further, the thrust seat plate 16 is easily worn due to the edges of the grooves 15, and generates a hitting sound when the eyeball 6 moves in the axial direction.

Furthermore, in the device disclosed in Japanese Utility Model Application Publication No. 56-32119, the lip is only baked into the inner and outer periphery of the thrust seat plate interposed between the bracket and the eyepiece, so that dust cannot be deposited on the shaft support part. Even if it is possible to prevent the intrusion of the eye, it cannot be expected to prevent the hitting sound caused by the collision with the bracket due to the movement of the eye in the axial direction.

[Problems to be Solved by the Invention] The purpose of the invention is to provide a shaft sealing device for a suspension leaf spring support that protects the shaft support from dust and the like and effectively prevents the impact sound of the eyeball. be.

[Means for Solving the Problems] In order to achieve the above object, the structure of the present invention includes an elastic sealing material that comes into contact with the bracket on the entire surface of one side of the thrust seat plate, which has a protrusion that engages with the split groove of the bracket. A lip that protrudes from the elastic sealing material to the opposite side, covering the inner and outer edges of the thrust seat plate.
It comes into contact with the end flange of the bush that fits into the eye, and the lip on the inner periphery also comes into contact with the connecting pin.

[Function] The elastic sealing material 21 bonded to the entire surface of one side of the thrust seat plate 24 comes into contact with the wall portion 3a of the bracket 3, thereby suppressing the collision sound caused by the movement of the eyeball 6 in the axial direction.

The lips 21a and 21b of the elastic sealing material 21 are
It comes into contact with the end flange 32 of the bush and the connecting pin 5, and prevents dust etc. from entering into the sliding part of the eyeball 6.

[Embodiment of the invention] As shown in FIGS. 4 and 5, the shaft sealing device 20 has a bushing 22 formed by integrally bonding a backing metal 23 and a bearing metal to the centerpiece 6, and a connecting pin inserted into the bushing 22. Both ends of the bracket 5 are inserted into pin holes in the wall 3a of the bracket, and bolts 17 that cross the split groove 15 are tightened and fixed to the wall 3a.

According to the present invention, the end flange 32 that abuts the end surface of the eyeball 6 is formed on the bush 22, and the thrust seat plate 24 is connected to the elastic sealing material 21 between the end flange 32 and the wall 3a. is interposed,
And it is unrotatably supported by the wall portion 3a. The thrust seat plate 24 made of a metal plate has a protrusion 25 for preventing rotation formed on one side by burring or the like, and is engaged with the groove 15 . An elastic sealing material 21 such as rubber is bonded to the entire surface of one side of the thrust seat plate 24 facing the wall 3a by baking or the like.

As shown in FIG. 5, a lip 21a that covers the inner circumferential edge of the thrust seat plate 24 and comes into contact with the circumferential surfaces of the end flange 32 and the connecting pin 5 is integrally formed on the inner circumferential edge of the elastic sealing material 21. Similarly, a lip 21b that covers the outer circumferential edge of the thrust seat plate 24 and comes into contact with the end flange 32 is integrally formed on the outer circumferential edge of the elastic sealing material 21.

According to the present invention, the elastic sealing material 21 bonded to the thrust seat plate 24 is pressed against the wall portion 3a, suppressing the hitting noise caused by the axial movement of the eyeball 6. The thrust seat plate 24 is supported by the wall portion 3a by a protruding piece 25 so as not to rotate, thereby preventing wear due to friction of the elastic sealing material 21 with the wall portion 3a and damage due to the edges of the grooves 15. The thrust seat plate 24 is rotatably abutted against the end flange 32 of the bushing. The end flange 32 is the winding end edge 6a of the eyeball 6.
(Fig. 1) to prevent dust from entering the sliding portion of the bush 22 and the connecting pin 5 through the gap between the edges 6a.

The lip 21b abuts the end flange 32 and prevents dust from entering the sliding portion of the bush 22 and the connecting pin 5 from the outer circumferential side of the eyeball 6. lip 2
1a is pressed against the circumferential surface of the connecting pin 5, and the split groove 1
5 to the sliding portion between the connecting pin 5 and the bush 22.

The present invention can also be applied to the shaft 7 of a leaf spring to obtain the same effect. In that case, the wall portion 3a corresponds to the shackle 7.

[Effects of the invention] As described above, the present invention combines an elastic sealing material that comes into contact with the bracket on one entire surface of one side of the thrust seat plate that has a protrusion that engages with the split groove of the bracket, and the thrust seat plate is made from the elastic sealing material. The lip that covers the inner and outer peripheries of the bushing and protrudes to the opposite side is in contact with the end flange of the bushing that fits into the eye, and the lip on the inner periphery of the bushing is in contact with the connecting pin. The structure is simple, the process of joining the elastic sealing material with the lip to the thrust seat plate is simple, and the attachment to the leaf spring support is easy.

The elastic sealing material bonded to the entire surface of one side of the thrust seat plate is in contact with the wall of the bracket, and is fixed by a protrusion to prevent relative rotation, so it is protected against wear due to friction with the bracket and edges of the split groove of the bracket. Damage is avoided.

The opposite side of the thrust seat plate abuts the end flange so that it can rotate relatively, and this abutting part is sealed by a pair of inner and outer lips, and at the same time, the inner lip also abuts the circumferential surface of the connecting pin. This prevents dust and the like from entering from the outer circumferential side and inner circumferential side (outer end side of the connecting pin) of the eye. This keeps the sliding part between the bush and the connecting pin clean and improves durability.

When the eyeball moves in the axial direction, metal contact is avoided by the elastic sealing material and the impact is absorbed, so the hitting sound is suppressed.

[Brief explanation of the drawing]

Figure 1 is a side view of the leaf spring suspension device, Figure 2 is a perspective view of the same leaf spring support, Figure 3 is a front cross-sectional view of the shaft sealing device of the conventional suspended leaf spring support, and Figure 4 is the book. FIG. 5 is a front sectional view of the shaft sealing device of the suspended leaf spring supporter according to the invention, and is an enlarged view of the main part thereof. 2: Chassis frame, 3: Bracket, 3
a: wall, 5: connecting pin, 6: eye, 10: plate spring, 15: split groove, 17: bolt, 20: shaft sealing device, 21: elastic sealing material, 21a, 21b: lip, 22: bush, 23: Back metal, 24: Thrust seat plate, 25: Projection piece, 32: End flange.

Claims (1)

[Scope of utility model registration request] An elastic sealing material that contacts the bracket is bonded to one entire surface of one side of the thrust seat plate having a protruding piece that engages with the split groove of the bracket, and a lip is formed from the elastic sealing material to cover the inner and outer peripheries of the thrust seat plate and protrude to the opposite side. A shaft sealing device for a suspended leaf spring support portion, characterized in that the bushing is in contact with the end flange of the bushing fitted in the centerpiece, and the inner lip of the bushing is in contact with a connecting pin.