JPH0976777A - Automotive propulsion shaft support device - Google Patents

Abstract

(57) Abstract: A first and a second support member and a bearing member and the like can be temporarily assembled, and the workability of assembly is improved. SOLUTION: A propulsion shaft 16 and a bearing member 18 arranged below a floor portion 10 are attached to bracket members 12 and 1.
4 and supports the connecting portions of the bracket members 12 and 14 to the stud bolts 22a and 22b and the nut 26a.
And the bracket member 12 for fastening at 26b.
And inner peripheral edge portions of the mounting holes 12a and 14a in the brackets 14, and the mounting holes 12 in the bracket members 12 and 14
b and 14b, the temporary fixing members 24
Inserted a and 24b.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a propulsion shaft support device for a vehicle, which is provided in a lower portion of a vehicle body of an automobile and supports a propulsion shaft arranged in the lower portion of the vehicle body.

[0002]

2. Description of the Related Art In an automobile, for example, a main body of an engine arranged in front of a vehicle body, a reduction gear unit arranged behind a transmission and a vehicle body, and a propeller for transmitting power between a drive axle are propelled. The axis is used. When the distance between the transmission and the damping gear device is relatively long, the propulsion shaft may be divided and connected to each other via a universal joint.
In this case, a bearing member that rotatably supports the propulsion shaft is provided, and the bearing member is attached to the lower portion of the vehicle body by a supporting device for practical use. Known as such a supporting device is, for example, Japanese Utility Model Laid-Open No. 60-114327 or that shown in FIG. 4, which is arranged below the floor portion 5 of the vehicle body. A first support for supporting an upper portion of a vibration absorbing member 8 surrounding the bearing member 2 for rotatably supporting the propulsion shaft 4 along the outer peripheral surface thereof, having vehicle body mounting holes 1a, 1b at both ends thereof. The bracket member 1 as a member and mounting holes 3a and 3b on both ends on the common axis of the mounting holes 1a and 1b of the bracket member 1, respectively, support the lower part of the vibration absorbing member 8 along the outer peripheral surface thereof. The bracket member 3 as the second supporting member and the pin member 6 for pin-connecting the bracket member 1 and one end of the bracket member 3 are included. Under such a condition, the bearing member 2 and the vibration absorbing member 8 are provided. Has a bracket The propulsion shaft 4 is press-fitted into the bearing member 2 by being sandwiched between the member 1 and the bracket member 3. Then, one ends of stud bolts 7a and 7b, which are provided as screw fixing members by projecting downward to the back surface of the floor portion 5 of the vehicle body, are inserted into the mounting holes 1a, 3a, 1b and 3b, respectively.
The propeller shaft 4, the bearing member 2, and the vibration absorbing member 8 are fastened together by the nuts Nua and Nub to form the bracket member 1.
And 3 are supported below the floor portion 5 of the vehicle body.

[0003]

In order to support the propulsion shaft 4, the bearing member 2 and the like below the vehicle body by the conventional supporting device as described above, first, the bearing member 2 and the vibration absorbing member 8 are bracketed. After being sandwiched by the member 1 and the bracket member 3, they are temporarily assembled by pin connection and integrated. Then, the propulsion shaft 4 is press-fitted into the bearing member 2. Next, the stud bolts 7 are inserted into the mounting holes 1a, 3a, 1b, 3b of the bracket member 1 and the bracket member 3, respectively.
The nuts Nua and Nub are inserted by inserting one ends of the a and 7b.
The propulsion shaft 4, the bearing member 2, and the vibration absorbing member 8 are supported below the vehicle body by being fastened. However, in such a conventional structure, when the nuts Nua and Nub are fastened, the bracket member 1, the bracket member 3, the propulsion shaft 4 and the like fall due to their own weight, and one end portion of the stud bolts 7a and 7b is attached to the mounting hole. 1a, 3
In order to prevent it from coming out of a, 1b, 3b, the worker needs to hold the propulsion shaft 4 and the like, which poses a problem that the workability of assembly is not good.

In view of the above points, the present invention is a vehicle propulsion shaft support device for supporting a propulsion shaft which is provided at a lower portion of an automobile body and which is arranged at the lower portion of the vehicle body. An object of the present invention is to provide a vehicle propulsion shaft support device capable of temporarily assembling the second support member and the bearing member and improving the workability of assembly.

[0005]

In order to achieve the above object, an automobile propulsion shaft support device according to the present invention is provided in a lower portion of a vehicle body in relation to a propulsion shaft arranged below the vehicle body of the automobile. A first fixing member that has a screw fixing member and a connecting portion in which a mounting hole into which one end of the screw fixing member is inserted is formed, and that holds a bearing member that rotatably supports the propulsion shaft via a vibration absorbing member; 1 support member, and a connecting portion that is arranged so as to face the first support member and has a mounting hole into which one end of the screw fixing member is inserted, and the bearing member via the vibration absorbing member. A second supporting member to be held, and a first engaging portion arranged on the common axis of the mounting holes of the connecting portions of the first supporting member and the second supporting member and engaged with the peripheral edge of the mounting hole. A temporary fixing member having a second engaging portion that is engaged with one end of the threaded fixing member; And a fastening member for fastening the connecting portion of the support member and the second support member to the fixing member with screw.

Further, the temporary fixing members are formed at the upper and lower ends, respectively, and the flange portions which are engaged with the peripheral portions of the mounting holes of the connecting portions of the first supporting member and the second supporting member are arranged in the vertical direction. It has a side wall portion that has a notch portion that extends and that connects the flange portions, and an engagement portion that is formed inside the flange portion and the side wall portion.

The cross-sectional shape of the second engaging portion of the temporary fixing member may be a sawtooth shape, and the temporary fixing member may be made of a resin material.

[0008]

FIG. 3B shows an example of a vehicle propulsion shaft support device according to the present invention together with a part of a vehicle body to which the vehicle is applied.

In FIG. 3 (B), the transmission is arranged below the floor portion 10 of the vehicle body (not shown) and is attached to the engine body provided in front of the vehicle and behind the vehicle body. The propulsion shaft 16 that connects the final reduction gear unit through the universal joint extends along the front-rear direction of the floor portion 10 of the vehicle body, and each of the divided parts is connected through the universal joint or the like. One end of the propulsion shaft 16 is supported by the transmission through the universal joint, and the other end of the propulsion shaft 16 is supported by the final reduction gear unit through the universal joint. The support device includes a bearing member 18 that rotatably supports a divided intermediate portion of the propulsion shaft 16,
A vibration absorbing member 20 that is made of an elastic material such as rubber and surrounds the outer peripheral portion of the bearing member 18 to absorb vibration, and the bearing member 18
For supporting the upper part of the through the vibration absorbing member 20
Bracket member 12 as a support member for the bearing and the bearing member 1
8 is provided on the lower surface of the floor portion 10 so as to face the bracket members 12 and 14, and a lower end of the floor portion 8 is supported via the vibration absorbing member 20. Stud bolts 22a and 22b as screw fixing members projecting upward
And nuts 26a and 26b which are engaged with one end portions of the stud bolts 22a and 22b through the connecting portions of the bracket members 12 and 14, respectively.

In addition, in the example of the vehicle propulsion shaft support device according to the present invention, in addition, the outer peripheral portion of the stud bolt 22a, the inner peripheral portion of the mounting hole 12a in the bracket member 12, and the mounting hole in the bracket member 14 are additionally provided. 14
a temporary fixing member 24a interposed between the inner peripheral portion of a and
And the outer peripheral portion of the stud bolt 22b and the bracket member 1
2 includes an inner peripheral portion of the mounting hole 12b of the bracket 2 and a temporary fixing member 24b interposed between the inner peripheral portion of the mounting hole 14b of the bracket member 14.

The vibration absorbing member 20 has a ring shape surrounding the outer peripheral portion of the bearing member 18, and the upper portion thereof is supported by the bracket member 12. The bracket member 12 is
Connecting portions are formed at both ends thereof, mounting holes 12a and 12b are provided in the connecting portions, respectively, and a curved portion 12c that is brought into contact with the outer peripheral portion of the vibration absorbing member 20 is formed in the central portion. There is. The lower portion of the vibration absorbing member 20 is supported by the bracket member 14.
The bracket member 14 has connecting portions formed at both ends thereof, mounting holes 14 a and 14 b are provided in each connecting portion, and a curved portion abutting the outer peripheral portion of the vibration absorbing member 20 in the center portion. 14c is formed. A plate-shaped member 28 having an axial through hole H common to the mounting holes 14a and 14b is provided on the lower surface of each connecting portion of the bracket member 14.
a and 28b are welded.

Since the temporary fixing members 24a and 24b have the structure shown in FIG. 2 and are the same on the left and right, one temporary fixing member 24a will be described, and the other temporary fixing member 24b will be omitted.

In FIG. 2, the temporary fixing member 24a is made of, for example, a resin material, is formed on the upper end portion, is engaged with the peripheral portion of the mounting hole 12a of the bracket member 12, and has a flange portion 30 having a tapered portion on the upper surface. And a flange portion 32 formed at the lower end portion and engaged with the peripheral edge portion of the mounting hole 14a of the bracket member 14, and a cylindrical portion 34 as a side wall portion connecting the flange portion 30 and the flange portion 32. . At the time of assembly, the stud bolt 22 is attached to the inner circumference of the cylindrical portion 34.
The cross-section saw blade-shaped portion serving as a second engaging portion that is locked to the male screw portion at one end portion of a and is restricted from moving downward, and is movable toward the other end portion of the stud bolt 22a. 36 are formed in multiple lines in the circumferential direction. Further, the cylindrical portion 34 is provided with four notches 34a extending in the vertical direction evenly in the circumferential direction in order to facilitate the bending of the upper portion thereof. In addition, in the present example, the second engaging portion is the saw-toothed section 36, but the present invention is not limited to such an example, and the second engaging portion may be the one end portion of the stud bolt 22a. It may be a continuous concave-convex portion that is engaged with the male screw portion and is movable toward the other end.

First, as shown in FIG. 3A, with the bearing member 18 assembled to the vibration absorbing member 20 by vulcanization adhesion or the like, the curved portion 12c of the bracket member 12 is
The bracket member 1 is brought into contact with the upper portion of the vibration absorbing member 20.
The curved portion 14c of No. 4 is brought into contact with the lower portion of the vibration absorbing member 20. Then, the mounting holes 12a, 1 of the bracket member 12
2b central axis and the mounting hole 14a of the bracket member 14,
With the central axis of 14b aligned with each other, the temporary fixing members 24a and 24b are attached to the mounting holes 12a and 14 respectively.
Insert into a. During this insertion, the temporary fixing members 24a, 2
The upper part of 4b is bent inward in the radial direction by the action of the notch,
Elasticity is restored at the end of insertion, so that the temporary fixing member 24
The flange portion 30 of each of a and 24b is snap-engaged with the peripheral edge portion of the mounting hole 12a, and the flange portion 32 is engaged with the peripheral edge portion of the mounting hole 14a so that the bracket members 12 and 14 absorb the bearing member 18 and the vibration. The member 20 is sandwiched and the temporary assembly is performed. Then, the propulsion shaft 16 is press-fitted into the bearing member 18.

Therefore, in the temporary assembly, it is not necessary to form the pin member for connecting the bracket member 12 and the bracket member 14 and the hole for inserting the pin member. Further, since the tip end shape of the flange portion 30 is tapered and the notch portion 34a is provided in the cylindrical portion 34, the temporary fixing member 24a can be easily inserted into the mounting holes 12a and 14a. Incidentally, the temporary fixing members 24a, 24b
It is preferable that the distance between the lower surface of the flange portion 30 and the upper surface of the flange portion 32 is set so as to correspond to the distance between the upper surface of the bracket member 12 and the lower surface of the bracket member 14 which are engaged with each other. Therefore, when the mounting holes 12a and 12b of the bracket 12 are stepped holes as shown in FIG.
The distance is set to the distance between the upper surface of the step portion and the lower surface of the bracket member 14.

Next, as shown in FIG. 3 (B), the bearing member 18 and the vibration absorbing member 20 sandwiched between the bracket members 12 and 14 temporarily assembled, the propelling shaft 16, and the bracket member 12 on the floor. The stud bolts 22a and 22b are arranged to face the lower surface of the portion 10 so as to face the stud bolts 22a, and one ends of the stud bolts 22a and 22b are inserted into the temporary fixing members 24a and 24b. This allows
As shown in FIG. 1, the provisional fixing members 24a and 24b have a sawtooth section 36 in cross section, which is locked by being engaged with the male screw portion of the stud bolt 22a, and is clamped by the temporarily assembled bracket members 12 and 14. Bearing member 18
Also, as shown in FIG. 3B, the vibration absorbing member 20 and the propulsion shaft 16 are held at one end of the stud bolt 22a without dropping due to their own weight.

Under such a condition, as shown in FIGS. 1 and 3B, the stud bolt 22
nuts 26a, 26b on the male threads of one end of a, 22b
The bracket members 12 and 14 that have been screwed in and temporarily assembled are moved upward and then fastened.

Further, when the nuts 26a and 26b are screwed into and fastened to the male screw portions of the stud bolts 22a and 22b, respectively, the temporary fixing members 24a and 24b are provided.
As shown in FIGS. 1 and 3B, the cross-section saw blade portion 36 in FIG.
Since it is automatically locked to the male screw portion of b, it is not necessary for an external holding means, for example, an operator to hold the propulsion shaft 16 or the like, and the workability and work efficiency of assembly are improved. .

[0019]

As is apparent from the above description, the vehicle propulsion shaft support apparatus according to the present invention has the connecting portion in which the mounting hole into which one end of the screw fixing member is inserted is formed. The first and second support members, which hold the bearing member that rotatably supports the propulsion shaft via the vibration absorbing member, are fastened to the threaded fixing member by the fastening member, so that the propulsion shaft and the bearing member are A second engagement in which the temporary fixing member is arranged on the common axis of the mounting holes of the connecting portions of the first supporting member and the second supporting member and is engaged with one end of the screw fixing member when supporting the vehicle body. Since the propulsion shaft, the first support member, the second support member, etc. do not drop due to their own weight, the propulsion shaft, the first support member, the second support member, etc. are held by the screw fixing member. can do. Therefore, the work of fastening the propulsion shaft, the bearing member, the first support member, and the second support member to the threaded fixing member by the fastening member can be easily and easily performed, and as a result, the workability of assembly is improved. It will be possible.

Further, since the temporary fixing member is inserted into the mounting hole of the connecting portion of the first supporting member and the mounting hole of the connecting portion of the second supporting member, the vibration absorbing member and the bearing member are narrowed. Since the first support member and the second support member can be integrated in the held state to perform temporary assembly, it is not necessary to provide another temporary fixing means, and the productivity is improved.

Further, since the temporary fixing member has a side wall portion in which a notch portion extending in the vertical direction is formed, the temporary fixing member is the first.
It becomes easy to insert into each attachment hole in the support member and the second support member.

[Brief description of drawings]

FIG. 1 is a partial cross-sectional view showing an enlarged main portion of an example of a vehicle propulsion shaft support device according to the present invention.

FIG. 2 is a perspective view showing a temporary fixing member used in an example of a vehicle propulsion shaft support device according to the present invention.

3A is a partial cross-sectional view showing a main part of an example of an automobile propulsion shaft support device according to the present invention, and FIG. 3B is an example of an automobile propulsion shaft support device according to the present invention to which it is applied. FIG. 3 is a cross-sectional view showing a part of the car body of the car.

FIG. 4 is a cross-sectional view showing a main part of a conventional device.

[Explanation of symbols]

10 Floor part 12,14 Bracket member (1st supporting member, 2nd supporting member) 12a, 12b, 14a, 14b Attachment hole 16 Propulsion shaft 18 Bearing member 22a, 22b Stud bolt (screw fixing member) 24a, 24b Temporary fixing member 26a, 26b Nut (fastening member) 30, 32 Flange portion (first engaging portion) 36 Cross-section saw blade portion (second engaging portion)

Claims (4)

[Claims] 1. A screw fixing member provided in a lower portion of a vehicle body in relation to a propulsion shaft arranged below the vehicle body of an automobile, and a mounting hole into which one end of the screw fixing member is inserted. A first supporting member having a connecting portion and rotatably supporting the propulsion shaft via a vibration absorbing member; and a first supporting member facing the first supporting member, A second supporting member having a connecting portion in which a mounting hole into which one end of the fixing member is inserted, and holding the bearing member through the vibration absorbing member; the first supporting member; A first engaging portion arranged on the common axis of the attachment hole of the connecting portion of the second support member and engaged with the peripheral edge portion of the attachment hole, and engaged with one end portion of the screw fixing member. A temporary engaging member having a second engaging portion, and the first supporting member and the second support. Automotive propeller shaft support device connecting portion in the member, characterized by comprising, a fastening member for fastening to the fixed member with the screw. 2. A flange portion, wherein the temporary fixing member is formed at upper and lower end portions, respectively, and is engaged with a peripheral portion of a mounting hole of a connecting portion of the first supporting member and the second supporting member, The notch portion extending in the up-and-down direction, the side wall portion connecting the flange portions, and the engaging portion formed inside the flange portion and the side wall portion. Automotive propulsion shaft support device. 3. The vehicle propulsion shaft support device according to claim 1, wherein the second engaging portion of the temporary fixing member has a saw-toothed cross-sectional shape. 4. The propulsion shaft support device for an automobile according to claim 1, wherein the temporary fixing member is made of a resin material.