JP2000079827A - Supporting structure for propeller shaft - Google Patents

Abstract

PROBLEM TO BE SOLVED: To execute the mounting work by one person and to easily execute the work without interfering the other part by providing a mounting tool attached to a car body side of a car body mounting bracket with a long mounting slot in the longitudinal direction of the car body to be mounted. SOLUTION: A center support 14 comprises a bearing 20 for supporting a propeller shaft, a mount member 24 attached outside of the bearing 20 and made of a rubber material or the like, and a car body mounting bracket 26 or the like. This car body mounting bracket 26 has an approximately semicircular section, and car body contact parts 30 are formed on its both ends. The car body contact parts 30 comprise the mounting slots 32, and the mounting bolts 36 to be screwed into the threaded holes of the car body, are fitted in the slots 32. The center support 14 is axially moved until the depth parts of the slots 32 reach the mounting bolts 36 to be fixed to the car body, whereby the propeller shaft is held by the car body. That is, the mounting work can be easily performed by one person.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a propeller shaft support structure provided with a center support for holding a middle of the propeller shaft.

[0002]

2. Description of the Related Art A vehicle is provided with a power transmission system for transmitting engine power from a transmission or a transfer to a differential through a propeller shaft and rotating left and right rear wheels mounted on left and right wheel shafts. I have.

As a propeller shaft, there is a divided type shown in FIG. That is, as shown in FIG. 22, the propeller shaft 102 is connected to the transmission 104 on the transmission side.
A first propeller shaft 102-1 connected to a transmission-side joint 106 and a second propeller shaft 10 connected to a rear differential 108 by a differential-side joint 110
2-2. The first propeller shaft 102-1 and the second propeller shaft 102-2 are connected to the center joint 112 and the first propeller shaft 102-1 from the first propeller shaft 102-1 side.
Center support 114-1, coupling 116, second center support 114-2, and center rear joint 11
8. The center joint 112
It has a sliding function and employs a double offset joint (DOJ) to maintain the balance during high rotation.

In the center support 114, FIG.
As shown in FIGS. 3 and 24, a bearing 120 supporting the propeller shaft 102 and an intervening body 122
Mounting material 124 made of rubber material provided through
And a vehicle body mounting bracket 126 surrounding the mount member 124.

The vehicle body mounting bracket 126 has a substantially semicircular cross section, and includes a curved holding portion 128 for holding the mount member 124 and vehicle body contact portions 130 on both ends of the holding portion 128. Become. This body contact part 1
Circular bolt holes 132, 132 through which mounting bolts (not shown), which are mounting tools to be screwed into the screw holes of the vehicle body, are formed in 30, 30.

Further, such a propeller shaft support structure is disclosed in, for example, JP-A-7-167153 and JP-A-8-58406. Japanese Unexamined Patent Publication No. Hei 7-167153 discloses that a change in relative position due to vibration is absorbed by sliding vibration of a connecting flange, and sliding movement of the connecting flange is limited. Japanese Unexamined Patent Application Publication No. 8-58406 discloses a device in which a contraction deformation portion is provided on the rear side of a vehicle body with respect to a bracket supporting a propeller shaft, thereby reducing an impact when a collision load is received.

[0007]

By the way, conventionally, when assembling a propeller shaft, a bolt hole of a center support is aligned with a screw hole of a vehicle body, and during this time, one operator works together with the propeller shaft with the center hole. Continue to hold the support until the end of the work, and another worker inserts the mounting bolt into the bolt hole, screws it into the screw hole, temporarily tightens it, and then moves the tip end of the propeller shaft to the transmission. And the rear end of the propeller shaft was connected to a differential machine, and finally the temporarily tightened mounting bolts were tightened to a specified torque.

Therefore, when assembling the propeller shaft,
There was an inconvenience of requiring two workers.

As shown in FIG. 25, when the joint does not have a sliding function, when the propeller shaft 202 is mounted on the rear differential 204, the propeller shaft 202
The projection 208 of the propeller side flange 206 of the differential machine 20
4 must be moved in the axial direction (forward) to the concave portion 212 of the differential side flange 210, but since the bolt hole is circular, the end portion of the differential side flange 210 is formed in the convex portion 208 of the propeller shaft 206. There is a problem in that interference occurs and it becomes difficult to assemble the propeller shaft 202.

[0010]

SUMMARY OF THE INVENTION In order to eliminate the above-mentioned disadvantages, the present invention provides a propeller shaft between a transmission mounted on a vehicle and a differential, and holds the propeller shaft halfway. In a propeller shaft support structure provided with a center support and fixing a vehicle body mounting bracket of the center support to a vehicle body by a mounting tool, the vehicle mounted on the vehicle mounting bracket is mounted on the vehicle body mounting bracket. Characterized in that a long mounting groove is formed in the front-rear direction.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS According to the present invention, when assembling a propeller shaft, first, a mounting tool is temporarily mounted on a vehicle body side.
Then, the long groove for mounting the body support bracket of the center support attached to the propeller shaft is attached to the mounting tool from the front side of the vehicle, and the center support only needs to be moved axially to the rear side of the vehicle, so that one person can The work can be performed by the operator, one person can be deleted from the conventional two people, and since the mounting long groove is opened at the rear of the vehicle, the center support is prevented from falling off and the like. Even in a joint without a sliding function, the propeller shaft does not interfere with other parts, and the work can be easily performed.

[0012]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing an embodiment of the present invention; 1 to 13 show a first embodiment of the present invention.
It shows an embodiment. 5 and 6, reference numeral 2 denotes a transfer connected to a vehicle transmission, 4 denotes a rear differential,
6 is a propeller shaft.

This propeller shaft 6 is of a split type, and has a first propeller shaft 6-1 connected to the transfer 2 by a transmission-side joint 8 and a second propeller shaft 6-1 connected to a differential 4 by a differential-side joint 10. Propeller shaft 6-2
Consists of

The first propeller shaft 6-1 and the second propeller shaft 6-2 are connected to a center joint (double offset joint (DOJ)) 12 and a first center support 14- from the first propeller shaft 6-1 side. 1, the coupling 16, the second center support 14-2, and the center rear joint 18.

In the center support 14, FIGS.
3, a bearing 20 for supporting the propeller shaft 6
And a mounting member 24 made of rubber or the like provided outside the bearing 20 via an intervening body 22, and a vehicle body mounting bracket 26 surrounding the mounting member 24.

The vehicle body mounting bracket 26 has a substantially semicircular cross section, and includes a curved holding portion 28 for holding the mount member 24 and vehicle body contact portions 30, 30 on both ends of the holding portion 28. Become.

The vehicle body contact portion 30 has a mounting long groove 32.
Is provided. The mounting long groove 32 is provided with a mounting bolt 3 which is a mounting tool screwed into a screw hole (not shown) of the vehicle body 34.
6 (see FIG. 7), and is formed to be open to the rear of the vehicle in the front-rear direction of the vehicle, that is, as shown in FIG. That is, in the first embodiment, the mounting long groove 32 has an opening 32a on the rear side of the vehicle and a curved deep portion 32b where the mounting bolt 36 is finally located, and has a length X. Further, it is formed in a U-shape with a width Y slightly larger than the diameter of the mounting bolt 36.

A rear bent wall 38-1 is formed on the rear side of the vehicle so as to sandwich the opening 32a around the vehicle body abutting portion 30 in which the mounting long groove 32 is formed. Front bent wall 3 on the front side of the vehicle
8-2 is formed, and an end-side bent wall 38-3 is formed on the side of the distal end portion.

Further, the holding portion 28 has the rear bent wall 3
8-1 and the curved front bent wall 40-1 connected to the curved rear bent wall 40-1 and the front bent wall 38-2.
2 are bent.

In the center support 14,
A relatively large width W such that the width of the holding portion 28 and the vehicle body contact portion 30 in the front-rear direction of the vehicle covers the outer surface of the mount member 24.
Is set wide.

Further, in the case of the center joint 12, FIG.
As shown in the figure, the inner ring 42 has a sliding function and is spline-coupled to the rear end of the first propeller shaft 6-1; a ball 44 disposed outside the inner ring 42; It comprises an envelope 48 disposed outside and having a ball moving groove 46 formed thereon, a boot cover 50 connected to the envelope 48, and a boot 52 in the boot cover 50.

An envelope 48 is connected to a front end portion of the second propeller shaft 6-2 by a fixing nut 54.

Next, the operation of the first embodiment will be described.

As shown in FIG. 7, first, a mounting bolt 36 is temporarily fastened to the vehicle body 34.

As shown in FIGS. 8 to 13, the opening 32a of the mounting long groove 32 of the center support 14 is fitted to the mounting bolt 36, and the deep portion 32b of the mounting long groove 32 is connected to the mounting bolt 36. Move in the axial direction until.

Then, the mounting bolt 36 is fully tightened with a specified torque, and the center support 14 is fixed to the vehicle body 34.
Thus, the propeller shaft 6 is held by the vehicle body 34.

Further, in the case of a joint having no sliding function as shown in FIG.
If the propeller shaft 6 is moved in the axial direction, the propeller shaft 6
The end portion of the differential-side flange of the differential 10 does not interfere with the convex portion of the shaft-side flange of the differential 10, and the assembly can be easily performed.

As a result, according to the above-described procedure, when the propeller shaft 6 is assembled, it can be performed by one worker,
The number of workers can be reduced by one.

Further, since the center support 14 is provided with a long groove 32 for mounting in the front-rear direction of the vehicle, the center support 14 does not move, rotate or fall off in the event of a frontal collision. The provided shock absorbing structure can be fully utilized, and the propeller shaft 6 can be easily assembled.

Further, since the end portion around the opening 32a is bent to provide each bent wall 38 in the vehicle body contact portion 30,
When the transfer 2 and the differential 4 are mounted on the propeller shaft 6, even if the propeller shaft 6 is slid, the fall of the propeller shaft 6 can be prevented.

Furthermore, since each curved bent wall 40 is provided on both sides of the holding portion 28, the strength can be improved and deformation due to collision can be suppressed.

Furthermore, the width W of the vehicle body mounting bracket 26
Is set wider, it is possible to cover the mount member 24 and protect it from stepping stones and the like.

FIGS. 14 to 16 show a second embodiment of the present invention.

The features of the second embodiment are as follows. That is, the mounting long groove 62 of the vehicle body contact portion 30 of the center support 14 is formed such that the inclined opening 62a is formed in a tapered shape at an angle α behind the vehicle so as to be divergent and the deep portion 62b has a diameter d The inner diameter D is substantially the same as the above.

According to the structure of the second embodiment, the inclined opening 62a is widened to facilitate the assembly, and the deep portion 62b is engaged with the mounting bolt 36 without any gap. An assembly error (angle) can be reduced.

FIG. 17 shows a third embodiment of the present invention.

The features of the third embodiment are as follows (SG1). That is, in the vehicle body contact portion 30,
A mounting slot 72 was formed. The mounting long hole 72 has a large diameter D1 insertion opening 72a through which the head of the mounting bolt 36 is inserted, and a deep portion 72b having a diameter D smaller than the diameter D1 of the insertion opening 72a so as to engage the mounting bolt 36. And are connected at the rear edge 30a behind the vehicle.

According to the configuration of the third embodiment, in the vehicle body contact portion 30, the rear side of the vehicle is connected by the rear edge portion 32a, so that the rigidity of the vehicle body mounting bracket 26 can be improved, and It can be.

FIG. 18 shows a fourth embodiment of the present invention.

The features of the fourth embodiment are as follows (SG2). That is, in the mounting bolt 36, the screw side shaft portion 36a is set to the diameter E1, and the head side shaft portion 36b located at the deep portion 32b of the mounting long groove 32 of the main body contact portion 30 is set to the diameter of the screw side shaft 36a. E1
It was formed in a tapered shape so as to have a diameter E2 gradually larger than that.

According to the structure of the fourth embodiment, after the mounting bolt 36 is temporarily fastened to the vehicle body 34, the opening 32a of the mounting long groove 32 is fitted to the screw side shaft 36a, and the deep part 32b is After being positioned at the head-side shaft portion 36b, the mounting bolt 36 is fully tightened, so that the large-diameter head-side shaft portion 36b
Is closely attached to the inner surface of the deep portion 32b, so that the center support 14 can be firmly fixed to the vehicle body 34 and provided.

FIGS. 19 and 20 show a fifth embodiment of the present invention.

The features of the fifth embodiment are as follows (SG3). That is, for example, in the center support 14 in the second embodiment, the vehicle body contact portion 30
The slip-off prevention body 82 which is a plate material having a shape corresponding to the shape of
It was interposed between the vehicle body 34 and the vehicle body contact portion 30. A long groove 84 corresponding to the mounting long groove 32 is formed in the detachment prevention body 82.

According to the structure of the fifth embodiment, when the mounting bolt 36 is fully tightened, as shown in FIG.
6, the center support 14 can be prevented from falling off.

FIG. 21 shows a sixth embodiment of the present invention.

The features of the sixth embodiment are as follows (SG4). That is, in the mounting long groove 32, the deep portion 32b is formed to be substantially the same as the outer diameter d of the mounting bolt 36, and the locking portion 32c of the deep portion 32b is formed.
Then, a tapered surface 32d inclined at an angle β is formed in the opening 32a at the rear edge. The locking portion 32c is formed to have a width F slightly smaller than the outer diameter d of the mounting bolt 36.

According to the configuration of the sixth embodiment, the tapered surface 32d allows the opening 32a of the mounting long groove 32 to be easily fitted onto the mounting bolt 36, and the locking portion 32c to be positioned on the mounting bolt 36. Sometimes, this locking portion 32c
When the deep portion 32b is positioned at the mounting bolt 36, the mounting bolt 36 is clamped by the locking portion 32c.
Dropout can be prevented.

[0048]

As is apparent from the above detailed description, according to the present invention, the mounting bracket of the center support is provided with the mounting long groove in the front-rear direction of the vehicle mounted on the mounting device mounted on the vehicle body. Due to the formation, when assembling the propeller shaft, first, the mounting tool is temporarily attached to the vehicle body side, and the mounting long groove of the body support bracket of the center support attached to the propeller shaft is installed from the front side of the vehicle Since it is only necessary to attach it to the fixture and move the center support to the rear side of the vehicle in the axial direction,
The work can be performed by one worker, one person can be deleted from the conventional two people, and since the mounting long groove is opened at the rear of the vehicle, the center support is prevented from falling off. Even in a joint without a sliding function, the propeller shaft does not interfere with other parts, and the work can be easily performed.

[Brief description of the drawings]

FIG. 1 is a partial cross-sectional view of a center support.

FIG. 2 is a front view of a center support.

FIG. 3 is a plan view of a center support.

FIG. 4 is a sectional view of a center joint and a center support.

FIG. 5 is a plan view of a propeller shaft.

FIG. 6 is a side view of a propeller shaft.

FIG. 7 is a view showing a state where the mounting bolts are temporarily fastened to the vehicle body.

FIG. 8 is a diagram when a center support is attached to a mounting bolt.

FIG. 9 is a view showing a state where each center support is mounted on a mounting bolt.

FIG. 10 is an enlarged view by an arrow X in FIG. 9;

FIG. 11 is an enlarged front view of a main part of FIG. 9;

FIG. 12 is a view showing a state in which an opening of a mounting long groove is moved to a position of a mounting bolt.

FIG. 13 is a view showing a state in which a deep part of the mounting long groove is moved to a position of a mounting bolt.

FIG. 14 is a plan view of a center support according to the second embodiment.

FIG. 15 is a partial sectional view of a center support in the second embodiment.

FIG. 16 is a front view of the center support of FIG.

FIG. 17 is a plan view of a center support in the third embodiment.

FIG. 18 is a side view of a mounting bolt according to a fourth embodiment.

FIG. 19 is a partial cross-sectional view of a center support according to a fifth embodiment.

FIG. 20 is a front view of the center support of FIG. 19;

FIG. 21 is a plan view of a center support according to a sixth embodiment.

FIG. 22 is a plan view of a conventional propeller shaft.

FIG. 23 is a partial sectional view of a conventional center support.

24 is a front view of the center support of FIG. 23.

FIG. 25 is a view showing an assembled state of a joint having no sliding function.

[Explanation of symbols]

 2 Transfer 4 Differential machine 6 Propeller shaft 14 Center support 26 Car body mounting bracket 28 Holding part 30 Car body contact part 32 Mounting long groove

Claims (6)

[Claims] 1. A propeller shaft is provided between a transmission mounted on a vehicle and a differential, a center support for holding the propeller shaft in the middle is provided, and a vehicle body mounting bracket of the center support is attached to a vehicle body by a mounting tool. In the propeller shaft support structure to be fixed, the vehicle body mounting bracket is formed with a mounting long groove in a front-rear direction of the vehicle mounted on the mounting tool mounted on the vehicle body side. Support structure. 2. The mounting long groove according to claim 1, wherein a width of an opening that opens rearward of the vehicle is set to be larger than a width of a deep part where the mounting tool is mounted. Propeller shaft support structure. 3. The propeller shaft support structure according to claim 1, wherein a bent wall is provided at a rear portion of the vehicle on the vehicle body mounting bracket. 4. The propeller shaft support structure according to claim 1, wherein a curved bent wall is formed substantially entirely in the curved holding portion of the vehicle body mounting bracket. 5. The propeller shaft support structure according to claim 1, wherein the vehicle body mounting bracket is formed wide. 6. A propeller shaft is provided between a transmission mounted on a vehicle and a differential, a center support for holding the propeller shaft in the middle is provided, and a vehicle body bracket of the center support is fixed to a vehicle body by a fixture. A propeller shaft supporting structure, wherein the vehicle body mounting bracket is formed with a mounting long hole extending in the front-rear direction of the vehicle to be mounted on the mounting tool mounted on the vehicle body side. Support structure.