JPS635938Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in a support structure for a differential device.

An example of the support structure of a conventional differential device will be explained with reference to FIGS. 1 and 2. Reference numeral 1 denotes a driving force from an engine (not shown) transmitted through a transmission 2, a transfer 3, and a propeller shaft 4. This is a front differential device for a four-wheel drive vehicle that transmits the information to the front axle 5.

Reference numeral 6 denotes a rear differential device that transmits driving force from an engine (not shown) transmitted via the transmission 2 and propeller shaft 7 to the rear wheels 8. The front differential device 1 includes a carrier 10 containing gears etc. and an axle 23.
housing 11 and axle pipe 1
The three parts mentioned above are each integrally fixed with bolts (not shown). The differential device 1 is supported at four points A, B, C, and D by a frame 15 disposed on both sides of the vehicle in the longitudinal direction of the vehicle.The support structure of A and B is shown in FIG. To explain, a bracket 16 having four screw holes 17 is fixed to the end of the axle pipe 12, and a bolt 2 having a washer 20 and a spring washer 21 is inserted into the screw hole 17.
2 is passed through the hole 19 of the bracket 18 and screwed together to secure the bracket 18.

The front end of the bracket 18 has an elastic member 25 and a washer 26 interposed in a bracket 24 welded to the frame 15 in front of the vehicle than the axle 23, and an elastic member 24 between the bracket 18 and the head of the bolt 27.
and are fixed with a nut 28 with a washer 26 interposed. Further, at the vehicle rear end of the bracket 18, a bracket 31 welded to the same bracket is fixed to a bracket 30 welded to the frame 15 at the rear of the vehicle from the axle 23 using the same structure as the front end fixing structure of the bracket 18. .

Next, the support structures at points C and D are all the same except that the bracket 18 is fixed directly to the housing 11, whereas the bracket 18 is fixed to the bracket 16 in the explanation of the support structure at points A and B. Since there is, I will omit the explanation.

In the above conventional structure, the differential device 1 is supported at a total of four locations, two at the front and two at the rear of the vehicle, and the tightening bolts at points B and C are mounted at narrow spaces between the frame 15 and the bracket 18. Since it is tightened, the workability is poor and the number of man-hours for installing the differential device 1 is increased.
Furthermore, since the integral bracket 18 is fixed to the frame 15 in the vicinity of the axle 23 and at the front and rear of the axle 23, an elastic material of such hardness is used that it does not worsen the movement of the differential device in the widthwise direction. When used, the movement of the vehicle in the vertical direction will be reduced and the differential device 1 to the frame 15 will be
The disadvantage is that the input that acts on the occupant through the vehicle also greatly impairs ride comfort.

In addition, each of the support points A to D are all located above the center of the axle of the differential device 1, and the straight line connecting the front support points A, C and the rear support points B, D is far away from the center of the axle. Therefore, when a torque reaction force is applied to the differential device and a rotational moment about the axle center is applied, a longitudinal load component in the same direction acts on each support point, causing the differential to The device 1 was easily movable in the front and rear directions. For this reason, it has been necessary to use a hard elastic material in order to avoid interference with the movement of the differential device 1 and with surrounding members. In addition, since the differential device 1 tends to move in the front-back direction in response to a torque reaction force, shearing force is likely to act on the bolts provided at each support point, which poses a problem in the durability of the bolts.

The present invention was devised in order to eliminate the above-mentioned drawbacks, and the present invention is designed to provide a desired distance from the axle connected to the differential device, and to connect the differential device to the vehicle at either the front or rear of the vehicle body. In the width direction, the differential device is supported by an elastic material at one location on each side of the vehicle on both sides of the vehicle body through an elastic material, and at one location between the left and right support portions on the other hand. The differential device is supported on the vehicle body via a material, and each support portion is supported so that a straight line connecting the one side support portion and the other side support portion passes near the center of the axle of the differential device. The gist of the present invention is to provide a support structure for a differential device, which is characterized in that the position of the differential device is set.

According to the above structure, since the differential device is supported at three points, the number of installation steps can be reduced, and since it is supported by the frame at a desired distance from the axle, the differential device is supported in the width direction of the vehicle. Since the vertical movement can be increased without worsening the movement and rolling, the input transmitted from the differential device through the frame is reduced and the feeling can be improved.

In addition, since the positions of the above support parts are set so that the straight line connecting the front support part and the rear support part passes near the center of the axle of the differential device, the difference of the differential device against the torque reaction force is There is little back-and-forth movement, making it easy to lower the spring constant of the elastic material of the support part, and having the effect of improving the durability of the support part.

Embodiments of the present invention will be described below with reference to FIGS. 3 to 5. Note that parts that are the same or substantially the same as those in the conventional structure are given the same reference numerals as in the conventional structure, and explanations thereof will be omitted. The differential device 1 is E, F, and G.
It is supported by the vehicle at three locations. Reference numeral 35 denotes a bracket having an inverted L-shape in cross section; one end is fixed to the bracket 16 in the same manner as in the conventional structure, and the other end (point E is supported by the bracket 4 in FIG. 5).
5 is the same except that 5 is the bracket 36) is a bracket 36 fixed to the frame 15 at the front of the vehicle with a distance L from the axle 23, with an elastic member 37 and a washer 38 interposed between the head of the bolt 41 and the bracket. The washer 41 and nut 42 are connected to the bolt 41 with an elastic member 39 and a washer 40 interposed between the bolts 41 and 35.
It is screwed together and fixed. Furthermore, one end of the other bracket 35 is fixed to the housing 11 in the same manner as in the conventional structure, and the other end (supported at point F) is fixed to a bracket 45 fixed to the frame 15 at the front of the vehicle with a distance L from the axle 23. It is fixed by the same parts configuration and structure as the above point E. Next, the support structure at point G will be explained with reference to FIG. 5
The rib 46 and the bracket 47 are fixed by screwing together the bolt 52 and nut 53, and both ends of the bracket 47 are connected to a cross member 55 having a box cross section by means of a bolt 57 with a spring washer 56 and a nut 58. It is fixed. Note that both ends of the cross member 55 are connected to brackets 60 and 61 fixed to the frame 15 by two bolts and nuts 62, respectively.

Further, to explain the relationship between each support point and the axle 23 with reference to FIG. 5, brackets 36 and 45 at points E and F
The center point K of the axle 23 is located approximately on a straight line connecting the center point H of the bolt 41 through hole on the top surface and the center point J of the bolt 52 through hole on the top surface of the bracket 47 at point G.

According to the above configuration, although the differential device 1 is supported at three points, which is a small number of supports, it is configured such that the axle center point K is approximately on a straight line connecting H and J of each support point, so that the differential The load of the differential device 1 can be efficiently received, and the number of man-hours for installing the differential device 1 can be reduced.

In addition, the axle center K of the differential device 1
are located near the straight line connecting the center point H of the front support points E, F and the center point J of the rear support point G, so even if a torque reaction force is applied to the differential device 1 and a rotational moment is applied around the axle center K, the front-to-rear components of the load acting on each of the support points E, F and G are small and act in opposite directions, so there is almost no movement of the differential device 1 in the front-to-rear direction. This makes it easy to reduce the spring constant of the elastic material at each support point to improve ride comfort,
There is no risk of interference with surrounding members, and there is no problem with the durability of the bolts at each support point.
Since the differential device 1 is supported at only one point on the frame 15, the vertical movement of the differential device 1 can be increased without increasing the movement of the differential device 1 in the vehicle width direction.
This has the effect of reducing the input transmitted through the frame 15 and improving the feeling.

Although the above embodiment was related to a front differential device for a four-wheel drive vehicle, it will be explained that it can be applied to a rear differential device for a four-wheel drive vehicle and a differential device for a two-wheel drive vehicle. Not even.

[Brief explanation of the drawing]

Figure 1 is an explanatory diagram of the layout of a conventional four-wheel drive system.
FIG. 2 is an enlarged perspective explanatory view showing the component structure of the part shown in FIG. 1, FIG. 3 is an explanatory view showing the support structure of the front differential device of the present invention, and FIG. FIG. 5 is an enlarged perspective explanatory view showing the configuration of parts such as a cross member, and FIG. 5 is an enlarged sectional view taken along the line - in FIG. 3. 1... Differential device, 10... Carrier, 11... Housing, 12... Axle pipe.

Claims (1)

[Scope of utility model registration request] The differential is connected to the differential at a desired distance from the axle connected to the differential at either the front or rear of the vehicle body and at one location on each side in the vehicle width direction of the differential via an elastic material. The differential device is supported by a frame disposed in the longitudinal direction of the vehicle body on both sides of the vehicle body, and the differential device is supported on the vehicle body at one location between the left and right support portions via an elastic material. , a differential device characterized in that the positions of each of the support portions are set so that a straight line connecting the one side support portion and the other side support portion passes near the center of the axle of the differential device. Support structure.