JPH1086603A - Spindle mounting structure for beam type suspension - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a spindle mounting structure of a beam type suspension wherein the number of part items is small and the price of each part is low, and which can be efficiently assembled. SOLUTION: A female screw 7 is made in the inside end 4 of a spindle 2 in the cross section of a vehicle, and after inserting this spindle 2 in the in the engagement hole in the reinforce section 3 of the end section of a beam 1, a bracket 8 is provided in the outside of an inside end section 4 of the spindle 2 in the cross direction of the vehicle, and the screw section of a bolt 10 is threadedly inserted into the through hole of this bracket 8. Both leg sections 12 of the bracket 8 are made to abut on the reinforce section 3 by threadedly engaging this bracket 8 in the female screw 7 of the spindle 2 and tightening it, and the flat face 14 of the bracket 8 is made to receive the seat face 13 of the bolt 10, generating stress to fix the tension of the spindle 2. The leg sections 12 of the bracket 8 may be inserted in the groove (recessed) section of the reinforce section 3. The bracket 8 can be eliminated by forming a flat section in the inside end section of the reinforce section 3 in the cross direction of the vehicle.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure for mounting a spindle constituting an axle to an end of a beam in a beam suspension of a vehicle.

[0002]

2. Description of the Related Art A spindle mounting structure for such a beam suspension is disclosed in, for example, Japanese Utility Model Laid-Open No. 60-105.
No. 206 is disclosed.

[0003]

However, in the conventional spindle mounting structure of the beam type suspension, as shown in FIG. 6, when the spindle 2 is mounted on the reinforce portion 3 formed at the end of the beam 1. A vehicle width direction inner end 4 of the spindle 2 is inserted into a fitting hole formed from the vehicle width direction outer side of the reinforcement 3.
In the vehicle width direction inner end 4 of the spindle 2 projecting inward in the vehicle width direction from the reinforce portion 2 and being welded all around to fix the two together. Therefore, there is a problem that the welding torch is difficult to rotate below the inner end 4 in the vehicle width direction of the spindle 2 where the beam 1 itself is located, resulting in poor workability. This problem arises, for example, when the brackets 101 and the trailing arms 101 are disposed further inward in the vehicle width direction than the vehicle width direction inner end 4 of the spindle 2 protruding from the reinforce portion 3 as shown in FIG. It becomes even more noticeable.

In order to avoid such a problem, for example, as shown in FIG. 8, a support plate 102 which can be attached further outside the end plate 5 disposed outside the reinforcement 3 in the vehicle width direction. Is formed integrally with the spindle 2 and the support plate 102 is fixed to the end plate 5 with a plurality of bolts 103 so as not to rotate. However, in the case of such a configuration, first, the number of parts is large, the unit cost of the spindle 2 itself in which the support plate 102 is integrally formed is high, and the time required for tightening the plurality of bolts 103 is high. The cost tends to be high, the assembly workability is poor, and the number of man-hours is disadvantageous.

The present invention has been developed in view of these problems. Since the number of parts is small and the unit price of parts is low, the cost can be reduced as a whole, and the beam type is excellent in assembling workability. An object of the present invention is to provide a suspension spindle mounting structure.

[0006]

According to a first aspect of the present invention, there is provided a spindle mounting structure for a beam suspension, wherein an axle is formed at a predetermined portion of a beam end of the beam suspension. A female screw is formed at the inner end of the spindle in the vehicle width direction, the inner end of the spindle in the vehicle width direction is inserted into a predetermined portion of the beam end, and bolts are inserted from the inner side in the vehicle width direction. The screw portion is screwed and fastened, whereby the spindle is fixed from the inside in the vehicle width direction by a tensile force composed of the stress on the seat surface of the bolt and the thrust of the screw. In addition, the thrust of the screw referred to here generally means that the screw advances in the lead direction by rotating the screw, and in addition to the force, when the screw does not advance due to, for example, the seat surface of the bolt abutting. The drawing also shows the tensile force in the axial direction of the screw portion in which the reaction force of the compressive stress between the contacting screw threads has been converted. As well known, the stress on the bearing surface of the bolt becomes a frictional force that prevents the bolt itself from rotating in a particularly loosening direction, and the tensile force in the axial direction of the screw portion as described above. Also. Therefore, it is possible to fix the spindle with these tensile forces.

In the spindle mounting structure for a beam type suspension according to the second aspect of the present invention, when the spindle is mounted on a reinforce part formed at the end of the beam, the spindle is inserted into a fitting hole of the reinforce part. After the vehicle width direction inner end is inserted, a flat portion for receiving the seat surface of the bolt is formed outside the vehicle width direction inner end of the spindle projecting to the vehicle width direction inner end of the rain force portion, and A bracket that abuts on the inner end in the vehicle width direction of the force portion is covered, a screw portion of a bolt is inserted into a through hole formed in the bracket, and the screw portion is screwed into a female screw of the spindle to be tightened. It is assumed that.

According to a third aspect of the present invention, in the spindle mounting structure for a beam type suspension, when the spindle is mounted on a reinforce portion formed at an end of the beam, a flat portion for receiving a seat surface of a bolt is provided. Using a bracket formed and interposed between the reinforce part and the bolt, a concave portion into which a part of the bracket is fitted is formed at an inner end in the vehicle width direction of the reinforce part. After inserting the inner end of the spindle in the width direction of the spindle into the hole, a part of the bracket is fitted into the recess, and the inner side of the spindle projecting to the inner end in the width direction of the reinforce portion in the width direction of the spindle. A bracket is put on the outside of the end, a screw part of a bolt is inserted into a through hole formed in the bracket, and it is screwed into a female screw of the spindle to be tightened. It is characterized in that the kick.

[0009] These inventions are based on the premise that the spindle is attached to a reinforce portion formed at the end of the beam. Generally, due to design requirements, the inner end in the vehicle width direction of this reinforce portion is not so smooth that the seat surface of the bolt can abut tightly. Therefore, as in the prior art, the vehicle width direction inner end of the spindle is slightly protruded from the vehicle width direction inner end of the reinforce portion, and a female screw formed at the vehicle width direction inner end of this spindle is bolted. When screwing and tightening the screw part of, the bracket with the flat part that can abut the bearing surface of the bolt,
It is interposed between the bolt and the reinforcement.
At this time, in the invention according to claim 2, one end of the bracket abuts on the inner end in the vehicle width direction of the reinforcement, and in the invention according to claim 3, a part of the bracket is fitted into the recess of the reinforcement. By doing so, it acts as a detent and stabilizes the bracket itself against the torque input to the spindle when tightening the bolt or when the wheel rotates, thereby fixing the bolt and spindle in a fixed state can do.

According to a fourth aspect of the present invention, there is provided a spindle mounting structure for a beam-type suspension, wherein the spindle is mounted on a reinforce portion formed at an end of a beam. A flat portion where the seating surface of the bolt abuts on the portion, and a through hole that penetrates through the flat portion from a fitting hole into which the vehicle width direction inner end of the spindle fits, is formed in the fitting hole in the vehicle width direction of the spindle. After the inner end is inserted, a screw portion of a bolt is inserted into the through hole, and the screw portion is screwed into a female screw of the spindle to be tightened.

[0011] These inventions also assume that the spindle is attached to a reinforce portion formed at the end of the beam. In the present invention, by forming a flat portion where the seat surface of the bolt abuts on the generally non-smooth reinforce portion as described above, a through hole is formed from this flat portion to the fitting hole. The screw portion of the bolt is inserted into this through hole, and the screw portion of the bolt can be screwed into the female screw formed at the inner end in the vehicle width direction of the spindle, thereby tightening the bolt or the spindle. Can be fixed in a constant state.

[0012]

As described above, according to the spindle mounting structure of the beam type suspension according to the first aspect of the present invention, the inner end in the vehicle width direction of the spindle is inserted into a predetermined portion of the beam end. Simply screw the bolt into the female thread at the inside end of the spindle in the vehicle width direction from inside the vehicle width direction and tighten the screw. Since it can be fixed from the inside in the direction, it is excellent in workability, the number of parts is small, and the unit price is low just by forming a female screw on the spindle, so the overall cost can be reduced. .

According to the spindle mounting structure of the beam type suspension according to the second aspect of the present invention, when the spindle is mounted on the reinforce portion formed at the end of the beam, the spindle is inserted into the fitting hole. The inner end in the vehicle width direction of the spindle is slightly protruded from the inner end in the vehicle width direction of the reinforce part, and a bracket is placed on the inner end in the vehicle width direction of the protruding spindle, and the through hole formed in the bracket is formed. Insert the screw part of the bolt into the hole,
By screwing it into the female screw of the spindle and tightening it, the bearing surface of the bolt comes into contact with the flat part of the bracket to generate stress, while one end of the bracket is attached to the inner end of the reinforcement in the vehicle width direction. The abutment serves as a detent function, stabilizing the bracket itself against the rotational force input to the spindle when tightening the bolt or rotating the wheel, thereby fixing the bolt or spindle in a fixed state. be able to.

According to the spindle mounting structure of the beam type suspension according to the third aspect of the present invention, when the spindle is mounted on the reinforce portion formed at the end of the beam, the spindle is inserted into the fitting hole. The inner end in the vehicle width direction of the spindle is slightly protruded from the inner end in the vehicle width direction of the reinforce part, and a bracket is placed on the inner end in the vehicle width direction of the protruding spindle, and the through hole formed in the bracket is formed. Insert the screw part of the bolt into the hole,
By screwing it into the female screw of the spindle and tightening it, the bearing surface of the bolt comes into contact with the flat portion of the bracket to generate stress, while a part of the bracket is fitted into the concave portion of the reinforcement. It can function as a detent and stabilize the bracket itself against the torque input to the spindle when tightening bolts or when the wheels rotate, so that the bolts and spindle can be fixed in a fixed state. it can.

According to the spindle mounting structure of the beam type suspension according to the fourth aspect of the present invention, when the spindle is mounted on the reinforce portion formed at the end of the beam, bolts are attached to the reinforce portion. By forming a flat portion with which the seating surface abuts, and by drilling a through hole from this flat portion to the fitting hole, a screw portion of a bolt is inserted into the through hole, and it is inserted into the vehicle width direction inner end of the spindle. The screw part of the bolt can be screwed into the female screw formed at the end, and the bolt and spindle can be fixed in a fixed state, reducing the number of parts by that much and improving workability can do.

[0016]

Next, a first embodiment of a beam mounting type spindle mounting structure of the present invention will be described in detail with reference to the drawings. This embodiment uses FF
(Front engine / Front drive) This is used for the rear link multi-link beam suspension of the vehicle.

This multi-link beam suspension has substantially the same configuration as that proposed above, and includes a beam body 22 to which a torsion beam 1 and a trailing beam 21 disposed in the vehicle width direction are fixed by welding. A lateral link 23 for connecting one end of the torsion beam 1 to a vehicle body-side member (not shown) so as to be swingable in a vertical direction, and swinging the central portion of the lateral link 23 and the torsion beam 1 in a vertical direction. And a control rod 24 which is connected as possible. The operation of this multi-link beam suspension will be briefly described. The length of the lateral link 23 and the control rod 24 or the length between their connection points and, for example, the bush 25 at the connection point between the torsion beam 1 and the lateral link 23 are described. By setting the lateral rigidity appropriately, the so-called Scott Russell mechanism absorbs lateral displacement to prevent the scuff change during bounce / rebounce, and jacks due to lateral force on the tire during cornering. By canceling up (down) force or the like, it is possible to achieve both ride comfort and maneuverability.

The reinforcement 3 is formed at both ends in the vehicle width direction of the torsion beam 1, and the end plate 5 is fitted on the outside thereof. A not-shown insertion hole is formed from the end plate 5 to the reinforcement 3 from the outside in the vehicle width direction. The vehicle width direction inner end 4 of the spindle 2 constituting the rear wheel shaft is inserted into this insertion hole. Fix it. FIG. 2 shows the vicinity of the spindle 2 and the reinforcement 3.
It is. FIG. 2A is a rear view of the left rear wheel, and FIG. 2B is a plan view of the right rear wheel, which has the same configuration except that it is symmetrical. This spindle 2 has a ball bearing 2
Since the hub 27 is rotatably mounted via the hub 6 and the wheel 28 is mounted on the hub 27, the spindle 2 can be an axle of the wheel 28. Reference numeral 29 indicates a disk rotor, 30 indicates a wheel cylinder caliper, 3
Reference numeral 1 denotes a lock nut for holding the hub 27 rotatably. Also, as described above, the reinforcer 3
Due to design requirements, the inner end in the vehicle width direction is not smooth. Has an irregularly continuous shape which becomes thicker.

On the other hand, a flange 6 is formed at the center of the spindle 2 to abut on the end plate 5 to perform positioning in the axial direction. It is formed into a small-diameter cylindrical shape from a cylindrical shape through a conical shape (in some cases, the generatrix may be an arc). A female screw 7 is formed at the inner end 4 of the spindle 2 in the vehicle width direction from the inside in the vehicle width direction along the axis thereof. From the end plate 5 to the reinforcement 3, a not-shown insertion hole simulating the shape of the inner end 4 of the spindle 2 in the vehicle width direction is formed. Part 4
FIG. 3A shows a state in which is fitted. As described above, when the vehicle width direction inner end 4 of the spindle 2 is inserted into the fitting hole, the tip of the small-diameter cylindrical portion described above is inserted into the reinforce portion 3.
Slightly protrudes from the inner end in the vehicle width direction.

As described above, the bracket 8 having a U-shaped cross section is placed on the outer side of the vehicle width direction inner end 4 of the spindle 2 projecting from the reinforcement 3. The bracket 8 is formed by bending a plate-shaped metal piece. A flat portion 14 is formed at the center of the bracket 8 and a through hole 9 is formed at the center thereof. In the U-shape, the ends of the two legs 12 are in close contact with the inner end surfaces in the vehicle width direction of the reinforcer 3. Accordingly, the end of the leg portion 12 is put over the vehicle width direction inner end 4 of the spindle 2 so as to abut on the vehicle width direction inner end of the reinforce portion 3, and the flat portion 1
The threaded portion 11 of the bolt 10 is inserted into the through hole 9 of 4 and screwed into the female screw 7 of the spindle 2 to be tightened.
At this time, the seating surface 13 of the bolt 10 abuts against the flat portion 14 of the bracket 8 and the two leg portions 12 of the bracket 8 abut against the vehicle width direction ends of the reinforce portion 3. Block the rotation of the bolt 1
0, a stress is generated on the bearing surface 13 and a screw thrust is generated on the screw portion 11 of the bolt 10, and the screw portion 1 is formed by the two.
A tensile force is generated from the inside in the vehicle width direction in the direction of the axis 1 to fix the spindle 2.

The bracket 8 has a U-shaped cross section.
It is not necessary to have a so-called hollow shape. For example, as shown in FIG. 3B, a solid bulk shape may be used. Such a bulky bracket 8 may be cut out by machining or formed by casting, but in any case, the surface that comes into contact with the reinforce portion 3 needs to be tightly contacted. Since the flat portion 14 with which the seating surface 13 of the bolt 10 abuts requires a certain degree of accuracy, it is preferable to perform machining as needed.

Next, a second embodiment of the spindle mounting structure of the beam type suspension according to the present invention will be described with reference to FIG. Although the bracket 8 having a U-shaped cross section is used in this embodiment, both ends thereof, that is, the lengths of the both legs 12 are longer than those of the above-described first embodiment, and the shape of the end is also large. The shape is not necessarily in close contact with the reinforce portion 3. Instead, a groove (concave) portion 15 into which the distal end portion of the leg portion 12 of the bracket 8 is tightly fitted is formed at the vehicle width direction inner end portion of the reinforce portion 3. Therefore, in this embodiment, the spindle 8 is put over the vehicle width direction inner end 4 so that the ends of the two legs 12 of the bracket 8 fit into the grooves (recesses) 15 of the reinforcement 3. , The flat portion 14
The threaded portion 11 of the bolt 10 is inserted into the through hole 9 and screwed into the female screw 7 of the spindle 2 to be tightened. At this time, the seating surface 13 of the bolt 10 abuts against the flat portion 14 of the bracket 8 and the two leg portions 12 of the bracket 8 abut against the vehicle width direction ends of the reinforce portion 3. Block the rotation of the bolt 10
Generates a stress on the bearing surface 13 of the bolt 10, and a thrust of the screw is generated on the screw portion 11 of the bolt 10, and the screw portion 11
A tensile force is generated from the inside in the vehicle width direction in the axial direction of the spindle 2 to fix the spindle 2.

Next, a third embodiment of the spindle mounting structure of the beam type suspension according to the present invention will be described with reference to FIG. In this embodiment, a separate bracket is not used between the reinforcement 3 and the bolt 10 as in the first and second embodiments. In order to give the reinforcement 3 a function equivalent to that of the bracket, the reinforcement 3 itself is improved as follows. First, the thickness of the reinforce portion 3 is increased, and a fitting hole for fitting the inner end portion 4 of the spindle 2 in the vehicle width direction is also deepened. Do not protrude from the inner end of the reinforcement 3 in the vehicle width direction. Then, the bolt 10 is appropriately machined or the like into the vehicle width direction inner end of the reinforce part 3 in which the vehicle width direction inner end 4 of the spindle 2 is fitted.
Is formed, and a through hole 16 is formed from the flat portion 17 to the fitting hole. Then, the bolt 1 is inserted into the through hole 16 of the flat portion 17.
The threaded portion 11 of the spindle 2 is inserted and screwed into the female screw 7 of the spindle 2 to be tightened. At this time, since the seating surface 13 of the bolt 10 comes into close contact with the flat portion 17 of the reinforce portion 3, stress is generated on the seating surface 13 of the bolt 10 and thrust of the screw is applied to the threaded portion 11 of the bolt 10. As a result, a tensile force is generated from the inside in the vehicle width direction in the axial direction of the screw portion 11 by both, and the spindle 2 can be fixed.

In the above embodiment, only the multilink beam rear suspension has been described in detail, but the spindle mounting structure of the present invention is applicable to any beam type suspension.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an example in which a spindle mounting structure of a beam type suspension according to the present invention is developed into a multi-link beam suspension.

FIG. 2 is a detailed explanatory view of the vicinity of a spindle in FIG. 1;
(A) is a rear view of the left rear wheel, and (b) is a plan view of the right rear wheel.

3A and 3B are explanatory views showing a first embodiment of a spindle mounting structure of a beam suspension according to the present invention, wherein FIG. 3A is a perspective view, and FIG. 3B is a perspective view of a different bracket shape.

FIG. 4 is a perspective view showing a second embodiment of a spindle mounting structure for a beam suspension according to the present invention.

FIG. 5 is a perspective view showing a third embodiment of a spindle mounting structure for a beam suspension according to the present invention.

FIG. 6 is a perspective view showing an example of a spindle mounting structure of a conventional beam type suspension.

FIG. 7 is a front view of the spindle mounting structure of FIG. 6;

FIG. 8 is a perspective view showing another example of the spindle mounting structure of the conventional beam type suspension.

[Explanation of symbols]

 1 is a beam 2 is a spindle 3 is a reinforcement 4 is a car width direction inner end 5 is an end plate 6 is a flange 7 is a female screw 8 is a bracket 9 is a through hole 10 is a bolt 11 is a screw 12 is a leg 13 Is a seating surface 14 is a flat portion 15 is a groove (concave) portion 16 is a through hole 17 is a flat portion

Claims (4)

[Claims] 1. A structure for mounting a spindle constituting an axle at a predetermined portion of a beam end of a beam type suspension, wherein a female screw is formed at an inner end in a vehicle width direction of the spindle, and the spindle is formed in a vehicle width direction. The inner end is inserted into the beam end at a predetermined position, and the screw part of the bolt is screwed in from the inside in the vehicle width direction and tightened, so that the spindle is turned by the tensile force consisting of the stress on the seat surface of the bolt and the thrust of the screw. A spindle mounting structure for a beam suspension, which is fixed from the inside in the width direction. 2. A method of mounting the spindle on a reinforcement formed at an end of a beam, comprising: inserting an inner end in a vehicle width direction of a spindle into a fitting hole of the reinforcement; A bracket that has a flat portion that receives a seat surface of a bolt and that abuts on the vehicle width direction inner end of the reinforce portion is placed outside the vehicle width direction inner end of the spindle projecting to the inner side end of the spindle. 2. A spindle mounting structure for a beam type suspension according to claim 1, wherein a threaded portion of a bolt is inserted into a through hole formed in the spindle and screwed into a female screw of the spindle to be tightened. 3. When mounting the spindle on a reinforce portion formed at an end of a beam, a flat portion for receiving a seat surface of a bolt is formed and a bracket interposed between the reinforce portion and the bolt is provided. A concave portion into which a part of the bracket is fitted is formed at the vehicle width direction inner end portion of the reinforce portion, and the vehicle width direction inner end portion of the spindle is inserted into a fitting hole of the reinforce portion. A bracket is fitted into the bracket so that a part of the bracket fits inside the bracket, and the bracket is placed outside the vehicle width direction inner end of the spindle projecting from the vehicle width direction inner end of the reinforce portion, and a through hole formed in the bracket is provided. Through the threaded part of the bolt,
The spindle mounting structure for a beam type suspension according to claim 1, wherein the screw is screwed into a female screw of the spindle and tightened. 4. A flat portion in which a seat surface of a bolt abuts an inner end in a vehicle width direction of a reinforce portion when mounting the spindle on a reinforce portion formed at an end portion of the beam, and a vehicle in a vehicle width direction of the spindle. After forming a through hole penetrating through the flat portion from the fitting hole into which the inner end is fitted, and inserting the vehicle width direction inner end of the spindle into the fitting hole,
The spindle mounting structure for a beam type suspension according to claim 1, wherein a screw portion of a bolt is inserted into the through hole, and the screw portion is screwed into a female screw of the spindle to be tightened.