JPH04203659A - Differential shim regulating structure - Google Patents

Abstract

PURPOSE:To simplify the replacement of a positioning regulator as well as to facilitate any regulation for the axial position of a gear shaft by interposing a positioning regulator between a mounting flange, joining to a supporter mounting part for a gear case of a bearing supporter, and this supporter mounting part. CONSTITUTION:A supporter mounting part 60a, having a surface almost orthogonal with a transfer pinion shaft 40, is formed in an inner transfer case 60. A mounting flange 54a is formed in a retainer 54 as projected outward to contact with the surface of the supporter mounting part 60a. In addition, a shim 68 or a positioning regulator, regulating a position in the axial direction (A direction) of the transfer pinion shaft 40 is interposed between this supporter mounting part 60a and the mounting flange 54a. When this shim 68 is replaced, an outer transfer case 72 is removed, a retainer mounting bolt 66 is loosened to some extent and furthermore the transfer pinion shaft 40, both first and second ball bearing parts 42, 44, the retainer 54, a ball bearing 70 and a support nut 74 are all moved in the axial direction of the transfer pinion shaft 40 as one body, thus a new shim 68 is interposed between them.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a differential shim adjustment structure, and in particular, it facilitates adjustment of the axial position of a gear shaft and simplifies the assembly work of parts such as bearings. The present invention relates to a possible differential shim adjustment structure.

[Prior Art] Among vehicles, there is a four-wheel drive vehicle (4WD vehicle) in which a transmission and the like are installed horizontally.

Among these four-wheel drive vehicles, there is one shown in FIG. 8, for example, which has a simple configuration using hypoid gears for the transfer of the power transmission device. That is, as shown in FIG. 8, a front differential device 102 is provided at the front of the vehicle, and a differential gear case 104 of the front differential device 102 has a reduction gear (not shown) fixed to a counter shaft of the transmission. A large reduction gear 106 meshed with the gear 106 is fixedly installed. Further, a transfer dog gear 108 is fixed to the differential gear case 104. This transfer dog gear 108 includes a transfer pinion 1 fixedly attached to a transfer pinion shaft 110.
12 are engaged.

In other words, the transfer dog gear 108 and the transfer small gear 112 are hypoid gears.

The transfer pinion shaft 110 is rotatably supported by two first and second tapered roller bearings 114. A spacer 118 is interposed between the two ends, and the other end is rotatably supported by a ball bearing 120, which is held by a retaining nut 122.

The first communication gear 124 is connected to the transfer pinion shaft 110.
is fixed, and an intermediate shaft 126 is fixed to this first communication gear 124.
A second communication gear 128 fixed to is meshed with the second communication gear 128.

This intermediate shaft 126 is connected to a rear output shaft 132 via a 4WD switching mechanism 130. A propulsion shaft connection body 134 connected to the rear propulsion shaft is coupled to this rear output shaft 132.

In FIG. 8, due to the characteristics of the non-X void gear consisting of the transfer large gear 108 and the transfer small gear 112, the assembly position of the transfer small gear 110 is indicated by the arrow A.
In order to adjust the direction (axial direction), transfer pinion shaft 1
A shim 136, which is a position adjustment body selected to have a predetermined thickness, is interposed between the base portion of the roller bearing 12 and the first tapered roller bearing 114. In such a 4WD vehicle, as shown in FIG. 9, a rear differential device 202 is installed at the rear of the vehicle, and a large transfer gear 206 is fixed to a differential gear case 204 of this rear differential device 202. It is meshed with a transfer pinion 210 fixed to the gear shaft 208. This transfer gear shaft 2
08, one end side on the transfer pinion 210 side is rotatably supported by two first and second tapered roller bearings 212.214, and the first and second tapered roller bearings 212.2
A spacer 216 is interposed between the two ends, and the other end is supported by a ball bearing 218. This ball bearing 218 is held by a retainer 220. A drive sprocket 222 is fixed to the transfer pinion shaft 208.

Further, a front side connecting shaft 224 is arranged substantially parallel to the transfer pinion shaft 208.

A driven sprocket 226 is fixed to one end of the front connecting shaft 224.

The transfer pinion 208 and the connection shaft 224 are constructed by winding a transmission device 28 such as a belt or chain around a drive sprocket 222 fixed to the drive pinion shaft 208 and a driven sprocket 226 fixed to one end of the front side connection shaft 224. Connected by multiplying.

The other end of the front connecting shaft 224 is connected to a front output shaft 230 via a 4WD switching mechanism 228.

A propulsion shaft connection body 232 connected to the front propulsion shaft is coupled to this front output shaft 230.

In FIG. 9, due to the characteristics of the hypoid gear consisting of the transfer large gear 206 and the transfer pinion 210, the transfer pinion 210 is used to adjust the assembly position of the transfer pinion 210 in the direction of arrow A (axial direction).
A shim 234 having a predetermined thickness is interposed between the base portion of the bearing and the first tapered roller bearing 216.

Further, such a gear shaft position adjustment structure is disclosed in, for example, Japanese Patent Publication No. 57-50685.

In the method described in this publication, a dummy shim is inserted in advance and a preload is applied to perform measurement back. By measuring the compensation difference between the amount of lash and the dummy shim, and easily stocking appropriate shims for each thickness, the shims can be assembled into the correct differential assy to perform accurate operation.

Further, the structure of the drive small gear is disclosed in, for example, Japanese Utility Model Publication No. 1982-19295.

The device described in this publication has concave portions for caulking the winding bushings on the peripheral edge on both sides of the large diameter end of the differential pinion (drive small gear) in the through hole, at approximately equal intervals in the circumferential direction, with a number greater than the number of seams of the winding bushings. If one or more of the several recesses corresponds to the seam of the winding bushing, by caulking the winding bushing to the recessed part that does not correspond to the seam, if one or several of the several recessed parts correspond to the seam of the winding bushing, it will correspond to the seam. The winding bushing is not caulked into the recessed part, therefore, the winding bushing is caulked against the recessed part to prevent the winding bushing from cracking or forming a protrusion at the seam of the winding bushing. .

[Problems to be solved by the invention] However, in the transfer shown in Figure 8.9,
When replacing the shim, loosen the retaining nut screwed onto the end of the transfer pinion shaft, remove each press-fitted bearing and spacer from the transfer pinion shaft separately, and then replace the shim. Afterwards, each bearing and spacer must be press-fitted onto the transfer pinion shaft again, which is a tedious task, making it difficult to adjust the axial position of the transfer pinion shaft, and requiring assembly work for each part. There was an inconvenience that it became troublesome.

[Object of the invention] Therefore, the object of this invention is to eliminate the above-mentioned disadvantages.
A bearing is provided to rotatably support a gear shaft on which one gear of a pair of meshing gears is provided, and a bearing holder is provided which holds the bearing integrally and is attached to the gear case. By providing a mounting flange that joins to the holder mounting part of the gear case and interposing a position adjustment body for adjusting the axial position of the gear shaft between the mounting flange and the holder mounting part, the position adjustment body To provide a differential shim adjustment structure that allows for easy replacement of gear shafts, easy adjustment of the axial position of a gear shaft, and easy assembly of parts such as bearings.

[Means for Solving the Problems] In order to achieve this object, the present invention provides a bearing that rotatably supports a gear shaft on which one gear of a pair of meshing gears is provided, and A bearing holder is provided that is integrally held and attached to the gear case, and the bearing holder is provided with a mounting flange that joins to the holder mounting portion of the gear case, and the mounting flange and the holder mounting portion are connected to each other. It is characterized in that a position adjustment body for adjusting the axial position of the gear shaft is interposed therebetween.

[Function] According to the structure of the present invention, when replacing the position adjustment body, the bearing is removed together with the gear shaft and the bearing holder,
When the old position adjustment body is removed, a new position adjustment pair is interposed between the mounting flange and the gear case's holding pair mounting part, and the mounting flange is attached to the gear case's holding pair mounting part, parts such as bearings are removed. Attached integrally with the bearing holder. Therefore, there is no need to remove the bearings of the gear shaft from side to side each time the position adjustment body is replaced.The axial position of the gear shaft can be easily adjusted, and parts such as bearings are integrated with the bearing holder. Since it can be handled easily, it is possible to simplify the work of assembling parts such as bearings.

[Examples] Examples of the present invention will be described below in detail and specifically based on the drawings.

1 to 6 show embodiments of this invention. In Fig. 5.6, 2 is a four-wheel drive vehicle (4WD vehicle) equipped with a transversely mounted transmission and the like. That is, in this 4WD vehicle 2, an engine 4 is mounted at the rear of the 4WD vehicle 2, a transaxle 6 is connected to this engine 4, one end of a front propulsion shaft 8 is connected to this transaxle 6, and this A front differential device 10 is connected to the other end of the front propulsion shaft 8.

The transaxle 6 includes a transmission 12, a rear differential device 14, and a transfer 16, as shown in FIG.

As shown in FIG. 3, the transmission 2 includes a clutch 18 that connects and disconnects the driving force from the engine 4, a main shaft 20 provided with a main gear train of multiple stages, and the main shaft 20.
The counter shaft 22 is arranged substantially parallel to the counter shaft 22 and is provided with a plurality of stages of counter gear trains.

A reduction pinion gear 24 of the rear differential device 14 is fixed to the counter shaft 22 . This reduction gear 24
, there is a large reduction gear 28 fixed to the differential gear case 26.
are engaged.

Inside the differential gear case 28, a differential pinion 32 provided on a differential pinion shaft 30 and a large differential gear 34 meshed with the differential pinion 32 are provided.

The rear differential device 14 is connected to left and right drive wheel shafts (not shown) that are connected to left and right rear wheels.

Furthermore, a thick transfer gear 36 is fixed to the differential gear case 26 . This transfer dog gear 36
As shown in FIG. 1, the transfer pinion 38 of the transfer 16 is meshed with the transfer pinion 38 . This transfer pinion 38 is fixed to a transfer pinion shaft 40. In other words, the transfer dog gear 36 and the transfer small gear 38 are hypoid gears.

As shown in FIG. 1.2, this transfer pinion shaft 40 has a press-fitted part 40a on one end side of the transfer pinion 38, which is rotatably supported by first and second tapered roller bearing parts 42.44. .

The first and second tapered roller bearings 42 and 44 are connected to the first tapered roller bearing 42 and 44, which are directly held in the press-fitted part 40a of the transfer pinion shaft 40.
, the second inner rings 4Ei, 48, and the first and second inner rings 46.
48 and the first and second tapered rollers 50152.

The first and second tapered rollers 50152 have inclined surfaces in the axial direction of the transfer pinion shaft 30, and are installed on the first and second inner rings 4B and 48, respectively, facing each other.

The first and second tapered rollers 50, 52 are held by a retainer 54 that is a bearing holder. That is, the inner surface of the retainer 54 has first and second tapered rollers that are gradually inclined toward the center portion along the inclined surfaces of the first and second tapered rollers 50 and 52.
Roller bearing surfaces 56,58 are formed.

This retainer 54 is held by an inner transfer case 60, which is a gear case.

The inner transfer case 60 includes a holder mounting portion 60a having a surface substantially perpendicular to the transfer pinion shaft 40.
is formed.

A mounting flange 54a is formed on the retainer 54 and protrudes outward to contact the surface of the holder mounting portion 60a.

A bolt insertion hole 62 is formed in the mounting flange 54a, and a bolt screw hole 64 is formed in the holder mounting portion 60a to match the bolt insertion hole 62.

Therefore, the retainer 54 has a retainer mounting bolt 66, which is a fastener, inserted into the bolt insertion hole 62 of the mounting flange 54a.
by inserting the retainer mounting bolt 66 into the bolt screw hole 64, the inner transfer case 6
It is fixed to 0.

A shim 68 which is a position adjustment body for adjusting the position of the transfer pinion shaft 40 in the axial direction (shown in six directions in FIG. 1.2) is provided between the holder attachment portion 60a and the attachment flange 54a. Intervened.

On the other hand, the other end of the transfer pinion shaft 40 is rotatably supported by a ball bearing 70.

The ball bearing 70 is retained by a retaining nut 74 that is threaded onto the outer transfer case 72 and the other end of the transfer facet axle 40.

The outer transfer case 72 is fixed to the inner transfer case 60 via an intermediate case 76 with case mounting bolts 78. Further, the intermediate case 76 is also fixed to the inner transfer case 60 by intermediate case mounting bolts 80.

A drive sprocket 82 is fixed to the transfer pinion shaft 40.

Further, a front side connecting shaft 84 is arranged substantially parallel to the transfer pinion shaft 40.

A driven sprocket 86 is fixed to one end of the front connecting shaft 84 . One end of the front connecting shaft 84 is rotatably supported by a ball bearing 88 held by the intermediate case 76 and a ball bearing 90 held by the outer transfer case 72.

Drive sprocket 82 and driven sprocket 86
A transmission tool 92 is wrapped around the.

The other end of this front side connecting shaft 84 is connected to a 4WD switching mechanism 94.

This 4WD switching mechanism 94 is connected to and from the front connection shaft 84 and the front output shaft 96.

This front output shaft 96 is coupled to a propulsion shaft connection portion 998 that is connected to a front propulsion shaft (not shown).

Next, the operation of this embodiment will be explained.

When assembling the transfer pinion shaft 40, first,
The first and second tapered roller portions 50152 provided on the first and second inner rings 46.48 are connected to the first and second roller bearing surfaces 50 of the retainer 54.
6.58, and the first and second tapered roller bearings 42.
44 is integrally attached to the retainer 54.

Then, the first and second inner rings 4B, 48 are press-fitted into the press-fit portion 40a of the transfer pinion shaft 40, that is, into the transfer pinion 38 side.

Next, a shim 68 of a predetermined thickness is interposed between the mounting flange 54a of the retainer 54 and the holder mounting portion 60a of the inner transfer case 60, and the mounting flange 54a is fixed to the holder mounting portion 60A with retainer mounting bolts 66. have it set up.

Then, the transmission tool 94 is wound around the drive sprocket 82 fixed to the transfer small gear shaft 40, and the pawl bearing 70 is press-fitted into the transfer small gear shaft 40 from the other end side of the transfer small gear shaft 40.

A retaining nut 74 is screwed onto the other end of the transfer pinion shaft 40.

An intermediate case 76 is joined to the inner transfer case 60, an outer transfer case 72 is joined to the intermediate case 76, and the outer transfer case 72 and the intermediate case 76 are integrally attached to the inner transfer case 60 using case mounting bolts 78. Fix it.

The intermediate case 76 is also fixed to the inner transfer case 60 by intermediate case mounting bolts 80.

Next, when replacing the shim 68, the case mounting bolts 78 are loosened and the outer transfer case 72 is removed.

Next, by loosening the retainer mounting bolt 66,
Transfer pinion shaft 40 and first and second roller bearings 42
．． 44, retainer 54, pole bearing 70, and retaining nut 7
4 are integrally moved in the axial direction of the transfer pinion shaft 40.

Then, a new shim 68 is interposed between the holder attachment part Boa and the attachment flange 54a.

Then, the retainer 54 is attached with the retainer mounting bolt 66.
When attached to the holder attachment part Boa of the inner transfer case 60, the transfer pinion shaft 40 is installed at a predetermined position in the axial direction (direction A).

Then, the outer transfer case 72 is transferred to the intermediate case 76.
This outer transfer case 72 is fixed to the inner transfer case 60 with case mounting bolts 78.

As a result, the first and second tapered roller bearing parts 40, 42, etc. can be integrally provided on the transfer pinion shaft 40 by the retainer 54, so that the assembly work is simplified.

Also, when replacing the shim 68, the transfer pinion shaft 40, the first and second tapered roller bearing parts 40, 42, the ball bearing 70. Since it is not necessary to separately remove the retaining nut 74, the shim 68 can be easily replaced, and the axial position of the transfer pinion shaft 40 can be easily adjusted.

Note that, as shown in FIG. 7, the first tapered roller bearing 99-1 and the second tapered roller bearing 99-2 are provided separately, and the distance between the first tapered roller bearing 99-1 and the second tapered roller bearing 44 is It is also possible to interpose a spacer 100 therein and hold these together by a retainer 54. In this case as well, it is possible to handle the first and second tapered roller bearings 99-1, 99-2 integrally with the retainer 54, as described above.

The structure of the present invention can also be used for hypoid gears, bevel gears, etc., and can be installed in other power transmission systems.

[Effects of the Invention] As is clear from the detailed explanation above, according to the present invention,
A bearing is provided to rotatably support a gear shaft on which one gear of a pair of meshing gears is provided, and a bearing holder is provided which holds the bearing integrally and is attached to the gear case. By providing a mounting flange that connects to the holder mounting part of the gear case and interposing a position adjustment body for adjusting the axial position of the gear shaft between the mounting flange and the holder mounting part, the position adjustment body The gear shaft can be easily replaced, the axial position of the gear shaft can be easily adjusted, and parts such as bearings can be easily assembled.

[Brief explanation of the drawing]

1 to 6 show embodiments of the present invention, FIG. 1 is a sectional view taken along knee 1 line in FIG. 4 of a differential device and transfer of a midship 4WD vehicle, and FIG. 2 is a main part of the transfer shown in FIG. 1. An enlarged cross-sectional view, Figure 3 is a cross-sectional view taken along line ■-■ in Figure 4 of the transmission, Figure 4 is a side view of the transaxle, Figure 5 is a schematic side view of a 4WD vehicle, and Figure 6 is a 4WD vehicle. FIG. FIG. 7 shows another embodiment of the present invention, and is an enlarged sectional view of the main part of the transfer. 8.9 shows the prior art, FIG. 8 is a sectional view of a front transfer, and FIG. 9 is a sectional view of a midship transmission and transfer. In the figure, 2 is a vehicle, 4 is an engine, 6 is a transaxle, 14 is a rear differential, 16 is a transfer, 36 is a transfer dog gear, 38 is a transfer pinion, 40 is a transfer pinion shaft, and 42 is a first
A tapered roller bearing part, 44 is a second tapered roller bearing part, 54 is a retainer, 54a is a mounting flange, 60 is an inner transfer case, 60a is a holder mounting part, 66 is a retainer mounting bolt, 68 is a shim, and 72 is an outside It is a transfer case. Patent applicant Suzuki Co., Ltd.

Claims (1)

[Claims] 1. A bearing is provided to rotatably support a gear shaft on which one of a pair of meshing gears is mounted, and a bearing holder is provided that integrally holds this bearing and is attached to a gear case. The holder is provided with a mounting flange that joins to the holder mounting portion of the gear case, and a position adjustment body for adjusting the axial position of the gear shaft is interposed between the mounting flange and the holder mounting portion. A differential shim adjustment structure characterized by: