JP4169928B2 - Changing the axle tilt angle of the trunnion suspension - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a method for changing an axle inclination angle of a trunnion suspension using a torque rod.
[0002]
[Prior art]
Conventionally, rear axles for large trucks are often used with two axles in order to reduce the axle weight per axle, but the trunnion type suspension is widely known as a suspension mounted on rear biaxle cars. Yes.
As conventionally known, the trunnion type suspension includes a trunnion shaft 5 fixed to the frame 3 by a trunnion bracket 1 as shown in FIGS. 4 and 5 , and a U bolt 9 on the trunnion shaft 5 via a spring seat 7. And a leaf spring 11 attached thereto.
[0003]
The leaf spring 11 is supported on the rear front axle and the rear rear axle 13 and 15 via a contact sheet 17, thereby supporting the load. Since the leaf spring 11 is only in contact with the contact sheet 17, the six torque rods 19 _{1 to} 19 ₆ are connected to the brackets 21 _{1 to} 21 ₆ to position the axles 13 and 15, and These torque rods 19 _{1 to} 19 ₆ receive the reaction force of the driving force and the braking force and transmit them to the frame 3.
[0004]
Thus, as shown in FIG. 6 , the torque rod 19 has a bush 25 press-fitted into the ring portions 23 at both ends, and is connected to the bracket 21 through a pin 27 of the bush 25 using a bolt 29 and a nut 31. ing.
FIG. 7 shows the structure of the bush 25, in which 33 is a cylindrical collar formed of metal, 35 is a cylindrical rubber mounted on the inside with the same central axis as the collar 33. 33 is press-fitted into the ring portion 23.
[0005]
Further, a metal cylindrical collar 37 having the same central axis as that of the rubber 35 and a pair of cylindrical split bearing members 39a and 39b formed of resin are laminated on the inner side of the rubber 35, and A pin 27 is inserted on the central axis of the bush 25 inside the split bearing members 39a and 39b. A projecting portion 43 that engages with a retaining recess 41 formed by the bearing members 39a and 39b is provided on the outer periphery of the central portion of the pin 27, and the retaining recess 41 and the projecting portion 43 Thus, the pin 27 is prevented from being pulled out, and a bolt insertion hole 45 into which the through bolt 29 is inserted is provided at both ends of the pin 27.
[0006]
In addition, in the figure, 47 is a metal ring stopper attached to the outer ends of the split bearing members 39a and 39b. The ring stopper 47 prevents the split bearing members 39a and 39b from being pulled out.
In this way, the bush 25 has a cylindrical collar 33 and a rubber 35, a collar 37, and a pair of split bearing members 39a and 39b sequentially stacked with the same central axis, and inside the split bearing members 39a and 39b. The pin 27 is inserted on the central axis of the bush 25, the entire bush 25 is press-fitted into the ring portion 23 of the torque rod 19, and the through bolt 29 inserted into the bolt insertion hole 45 of the pin 27 is used. Thus, the torque rod 19 and the bracket 21 are connected.
[0007]
[Problems to be solved by the invention]
By the way, in conventional vehicles equipped with this type of trunnion type suspension, the length of the wheel base, the mounting position and type of the engine differ depending on the type of vehicle, so the inclination of the diff varies depending on the angle of the propeller shaft, and the axle inclination angle Is different.
[0008]
And since the axle tilt angle is determined by the arrangement of the torque rod and the mounting bracket, conventionally, in order to cope with the change of the axle tilt angle according to the vehicle type, for example, a plurality of types of torque rods having different dimensions are manufactured every 5 mm, and The arrangement of the torque rod and mounting bracket has been changed for each vehicle type, but it is necessary to manufacture multiple types of torque rods with different dimensions in this way, which increases the number of parts and costs. It was pointed out.
[0009]
The present invention has been devised in view of such circumstances, and focuses on a bush that is press-fitted into the ring portion of the torque rod, and by making improvements to this, without producing a plurality of types of torque rods having different dimensions. It is an object of the present invention to provide a method for changing an axle inclination angle of a trunnion suspension capable of changing an axle inclination angle .
[0010]
[Means for Solving the Problems]
In order to achieve such an object, a method for changing an axle inclination angle of a trunnion suspension according to claim 1 is provided by sequentially stacking a cylindrical rubber, a collar, and a pair of split bearing members inside a cylindrical collar. Bushings with pins inserted inside the bearing member in the axial direction of the collar are press-fitted into the ring parts at both ends of the torque rod, and the pins of each bush are connected to the brackets with bolts and nuts, and the rear front shaft and rear rear shaft A trunnion-type suspension that positions the axle of the bush. When the bush is press-fitted into the ring portion, the bush is formed by eccentrically locating the pin radially from the central axis of the collar, and the pin is disposed on the central axis of the collar. Prepare the bushes, place the pins on the center axis of the torque rod, and change the mounting direction of the pins to combine these bushes. And changes the axle inclination angle to obtain different torque rod lengths between.
[0011]
(Function)
According to the bush according to claim 1, the bush in which the pin is eccentric in the radial direction from the central axis of the collar and the bush in which the pin is arranged on the central axis of the collar are combined and used for the torque rod of the trunnion suspension. Thus, a plurality of types of torque rods having different dimensions between pins can be obtained without manufacturing a plurality of types of torque rods as in the prior art, and the axle inclination angle of the trunnion type suspension can be changed according to the vehicle type .
[0012]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
Since the configuration excluding the invention portion is the same as that of the conventional example shown in FIG. 4 and the subsequent figures, the same components are denoted by the same reference numerals and the description thereof is omitted, and only the invention portion will be described.
[0013]
Figure 1 shows a torque rod with Bush, in the figure 49 is a bush which is pressed into one end of the ring portion 23 of the torque rod 19, also bush 49 of the present embodiment, as shown in FIG. 2, FIG. Like the conventional bush 25 described in FIG. 7 , a cylindrical rubber 35 and a collar 37 and a pair of resin-made cylindrical split bearing members 51a, In this embodiment, the split bearing member 51a and the split bearing member 51b are arranged. The pin 27 is inserted in the axial direction of the collar 33 inside the split bearing members 51a and 51b. The pin 27 is eccentric in the radial direction from the central axis O of the collar 33 (bush 49), and the broken line in the figure indicates the insertion of the pin 27 of the conventional bush 25. Shows the landing position .
[0014]
In the figure, reference numeral 53 denotes a metal ring stopper attached to the outer ends of the split bearing members 51a and 51b. Like the ring stopper 47, the ring stopper 53 prevents the split bearing members 51a and 51b from being detached. It is illustrated.
The bush 49 of the present embodiment is configured as described above, and in the present embodiment, the axle inclination angle is changed using the bush 49 as follows.
That is, when the bush 49 is press-fitted into the ring portion 23 of the torque rod 19, the pin 27 is arranged on the central axis of the torque rod 19, and the mounting direction of the pin 27 is changed and combined with the conventional bush 25. 3 (a) to 3 (e), five types of patterns having different lengths between the pins 27 and 27 (L1 <L2 <L3 <L4 <L5) are obtained. Corresponds to the fact that five types of torque rods having different dimensions were manufactured.
[0015]
Therefore, according to the present embodiment, as described above, the five types of torque rods 19 having different lengths between the pins 27 and 27 are obtained by using the conventional bush 25 and the bush 49 according to the present embodiment. As a result, the axle inclination angle of the trunnion suspension can be changed according to the vehicle type .
However , according to the present embodiment, it is not necessary to manufacture a plurality of types of torque rods 19 as in the prior art. As a result, the number of parts can be reduced by integrating the parts of the bracket 21 and the torque rod 19 and the cost can be reduced. Was planned.
[0026]
【The invention's effect】
As described above , according to the first aspect of the present invention, the axle inclination angle of the trunnion type suspension can be changed according to the vehicle type.
Then, conventional as required, such damage to manufacture a plurality of kinds of the torque rod, it is possible to reduce the number of parts by the part integrating bracket and torque rods, it was decided that cost reduction can be achieved.
[Brief description of the drawings]
1 is a side view of a torque rod used in an embodiment of claim 1;
FIG. 2 is a cross-sectional view taken along the line II-II in FIG.
FIG. 3 is a side view of a plurality of torque rods with different pin attachment positions.
FIG. 4 is an overall perspective view of a conventional trunnion type suspension.
5 is a side view of the trunnion suspension shown in FIG . 4. FIG.
FIG. 6 is a side view of a conventional torque rod.
A VII line sectional view - 7 VII in FIG.
[Explanation of symbols]
19 Torque rod 21 Bracket 23 Ring part 25, 49 Bush 27 Pin 29 Through bolt 31 Nut 33, 37 Collar 35 Rubber 43 Convex part 45 Bolt insertion hole 51a, 51b Split bearing member

Claims (1)

A cylindrical rubber, a collar, and a pair of split bearing members are sequentially stacked on the inner side of the cylindrical collar, and a bush having a pin inserted in the axial direction of the collar inside the split bearing member is a ring portion at both ends of the torque rod. Is a trunnion type suspension that positions the axles of the rear front axle and rear rear axle by passing the pins of each bush through the bolts and nuts and connecting the brackets with the bolts and nuts.
Prepare a bush in which the pin is eccentric in the radial direction from the central axis of the collar and a bush in which the pin is arranged on the central axis of the collar.
While placing the pin on the center axis of the torque rod, changing the mounting direction of the pin and combining these bushes, the torque rod with different length between pins is obtained and the axle tilt angle is changed. To change the axle tilt angle of the trunnion suspension.

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