JPH0719953Y2 - Vehicle suspension system - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Field of Industrial Application) The present invention relates to an improvement of a vehicle suspension device mounted on a vehicle such as a small bus.

(Prior Art) Generally, as a suspension device for a vehicle, a double wishbone type independent suspension type suspension body has been conventionally known. When this type of suspension device is used as a suspension for the front wheels of a vehicle such as a small bus, a suspension cross member is arranged between the side frames on both sides of the vehicle body, and each suspension component is attached to this suspension cross member. I have to.

In addition, the suspension main body is provided with a substantially A
A pair of character-shaped suspension arms are provided.
In this case, the inner end of the lower suspension arm, that is, the lower arm is connected to a fixed part on the vehicle body side such as a suspension cross member, and the outer end of the lower arm is connected to the lower end of the knuckle part on the wheel side. ing. Furthermore, the upper suspension arm, that is, the inner end of the upper arm is connected to, for example, a support bracket fixed to the suspension cross member and the side frame, and the outer end of the upper arm is connected to the upper end of the knuckle portion. . A suspension spring and a shock absorber are attached to the lower arm, respectively.

By the way, in this type, the suspension cross member has conventionally been formed by pressing a sheet metal material. However, when a suspension cross member is pressed from a sheet metal material, a large-sized press working equipment is required, which causes a problem of high cost.

Further, since the suspension cross member of the pressed product has a substantially uniform cross-sectional shape, there is a problem that the rigidity is relatively weak. Therefore, since the number of parts that can be mounted on this suspension cross member is limited, the number of parts that are separately attached to places other than the suspension cross member is increased, and the structure around the suspension device installation part is complicated and the assembly work is performed. There was a problem that it deteriorated.

(Problems to be solved by the invention) In the conventional structure, the suspension cross member of the double wishbone type independent suspension type suspension main body is formed by pressing a sheet metal material, so that a large press In addition to the problem that the processing equipment is required and the cost is high, the suspension cross member of the pressed product has relatively low rigidity, and the number of parts that can be mounted on this suspension cross member is limited. However, there is a problem in that the surrounding structure becomes complicated and the assembling workability deteriorates.

The present invention has been made in view of the above circumstances. The rigidity of the suspension cross member is higher than that of a pressed cross suspension member, the number of parts that can be mounted on the suspension cross member is increased, and the configuration around the installation portion is simplified. It is an object of the present invention to provide a vehicle suspension device capable of improving workability in assembling and improving workability in mounting an engine body on a suspension cross member.

[Structure of the Invention] (Means for Solving the Problem) This invention is to form a suspension cross member of a double wishbone type independent suspension type suspension body by casting, and to make the cross-section into a substantially U-shape with an opening at the bottom. A plurality of reinforcing ribs formed on the inner surface of the body of the suspension cross member and extending upward and downward are provided in a connected state between both side surfaces of the suspension cross member body, and the length of each reinforcing rib is long. The suspension cross member main body is provided in such a state that a fixing tool for the engine main body can be inserted from the lower opening of the suspension cross member main body, and the reinforcing rib near the mounting portion of the lower arm of the suspension main body has a lower opening of the suspension cross member. It extends from the part in the upward direction.

(Operation) A suspension cross member is formed by casting,
Stiffness of the suspension cross member is improved by providing a plurality of reinforcing ribs extending upward and downward on the inner surface of the suspension cross member body having a substantially U-shaped cross section in a connected state between both side surfaces of the suspension cross member body. By increasing the number of parts that can be mounted on this suspension cross member to simplify the configuration around the installation part and improve assembly workability, the length of each reinforcing rib can be adjusted from the bottom surface of the suspension cross member body. By setting the tool for fixing the engine body so that it can be inserted, it is possible to fix the engine body from the bottom surface of the suspension cross member when mounting the engine body on the suspension cross member, especially during line work. Improve sex. In addition, the suspension cross member has a U-shape with an open bottom, and the inner surface of the cross member is provided with a plurality of reinforcing ribs extending in the up-and-down direction in a state where both side surfaces are connected, and in the vicinity of the lower arm mounting part of the suspension body. The ribs are formed upward from the lower opening portion of the suspension cross member main body, so that the rigidity of the cross member main body is improved by the plurality of reinforcing ribs, and the lower arm of the suspension main body of the suspension main body, which is required to have the highest strength, is formed. In the vicinity of the mounting portion, ribs are formed upward from the lower opening of the suspension cross member so that the cross member has a completely closed cross section to increase rigidity and ensure the function as an independent suspension device. is there.

Embodiment An embodiment of the present invention will be described below with reference to the drawings.
1 to 3 show a schematic structure of an entire suspension body of a double wishbone type independent suspension type mounted on a front wheel side of a vehicle such as a small bus, where 1 is a side frame on both sides of the vehicle, and 2 is a side frame. It is a suspension cross member installed between both side frames 1 and 1. An engine body 3 is supported on the suspension cross member 2 via engine mount rubbers 4,4.

In addition, the suspension main body is provided with a substantially A
A pair of character-shaped suspension arms 5 and 6 are provided. In this case, the lower suspension arm, that is, the inner end of the lower arm 6 has the suspension cross member 2
The outer end portion is connected to the lower end portion of the knuckle support 8 forming the knuckle portion on the wheel 7 side.
Further, the rear end of the strut bar 9 is connected to the outer end of the lower arm 6. The front end of the strut bar 9 is connected to a cross member 10 arranged in front of the suspension cross member 2 via a mounting bracket 11.

The upper suspension arm, that is, the inner end of the upper arm 5 is connected to a support bracket 12 fixed to the suspension cross member 2 and the side frame 1. Further, the outer end of the upper arm 5 is connected to the upper end of the knuckle support 8.

Further, 13 is a torsion bar forming a suspension spring. The front end of the torsion bar 13 is connected to the suspension cross member 2. Further, the rear end portion of the torsion bar 13 is a transmission cross member disposed behind the suspension cross member 2.
It is extended to 14 lower positions. The transmission cross member 14 is provided with a torsion bar anchor portion 15 that adjusts the vehicle height by adjusting the amount of twist of the torsion bar 13.

Further, 16 is a shock absorber. The lower end of the shock absorber 16 is attached to the lower arm 6 via a shock absorber support bracket 17, and the upper end is attached to the support bracket 12. Reference numeral 18 is a rebound stopper attached to the upper arm 5, and 19 is a bump stopper attached to the lower arm 6. As shown in FIG. 2, the upper arm 5 is provided with a pair of arm constituent members 5a and 5b, and the rebound stopper 1 is attached to each of the arm constituent members 5a and 5b.
8 is installed.

On the other hand, FIG. 4 and FIG. 5 show the suspension cross member 2. The suspension cross member 2 is formed by casting. In this case, the main body 2a of the suspension cross member 2 has a substantially U-shaped cross section, and the lower surface is opened. Further, as shown in FIG. 6, a plurality of reinforcing ribs extending upward and downward are provided on the inner surface of the suspension cross member body 2a.
20 ... is both sides 2b, 2 of the suspension cross member body 2a.
It is provided in a connected state between c.

The length of each of the reinforcing ribs 20 is set so that a fixing tool for the engine body 3, for example, a torque wrench 21 can be inserted from the lower surface of the suspension cross member body 2a. In this case, the suspension cross member body 2a
As shown in FIGS. 5 and 6, a substantially arc-shaped recess 21 for mounting the engine body 3 is formed on the upper surface of the engine at the substantially central portion side. Mounting holes 22 for the engine mount rubber 4 are formed at both ends of the recess 21.

Further, an attachment work hole 23 for the engine mount rubber 4 is formed on the side surface of the suspension cross member body 2a in the vicinity of the attachment hole 22. Then, as shown in FIG. 6, reinforcing ribs 20a, 20a arranged at positions corresponding to the inner bottom position of the recess 21 of the suspension cross member body 2a.
As shown in FIG. 7, a and 20a extend from the upper wall surface 2d position of the suspension cross member body 2a to a position near the lower end portion 2e.

Further, the reinforcing ribs 20b, 20b arranged between the reinforcing ribs 20a ... And the mounting work hole 23 are formed only in the vicinity of the upper wall surface 2d of the suspension cross member body 2a as shown in FIG. Has been done. These reinforcing ribs 20b, 20b are provided on the side surface of the suspension cross member body 2a.
A rack-and-pinion type power steering mounting portion 24 disposed in front of the suspension cross member 2 is formed below the.

Further, as shown in FIG. 9, reinforcing ribs 20c, 20c whose upper portions are opened are provided below the mounting work holes 23. The upper openings of the reinforcing ribs 20c, 20c form a tool insertion opening 25 into which a tool for fixing the engine body 3, such as the torque wrench 21, is inserted. Further, the reinforcing ribs 20d, 20d arranged outside the mounting work hole 23 are formed only at positions near the upper wall surface 2d of the suspension cross member body 2a. Then, on the side surface of the suspension cross member body 2a, a mounting portion 26 for the lower arm 6 is formed below the reinforcing ribs 20d, 20d. Therefore, the tool for fixing the engine main body 3 such as the torque wrench 21 is located at the center of the opening on the lower surface of the suspension cross member main body 2a, as shown by the phantom line in FIG. 6, from the tip of each reinforcing rib 20a, 20b, 20c. It is designed to be inserted up to the position of the mounting hole 22 through a gap therebetween.

Further, the receiving portions 27 of the bump stoppers 19 attached to the lower arms 6 are provided at both ends of the suspension cross member body 2a.
Are formed.

Furthermore, the upper wall surface 2d of the suspension cross member body 2a
At both ends, projecting portions 28 ... Which are respectively projected in the front-rear direction of the vehicle body are formed. These projecting portions 28 have a mounting surface 29 for mounting the side frame 1 and the support bracket 12.
Are formed. In this case, the mounting surface 29 is formed with a thick portion 31a for adjusting the hole position around the portion corresponding to the position where the bolt insertion hole 30a of the fixing bolt for the suspension cross member body 2a and the side frame 1 is formed. At the same time, a thick portion 31b for adjusting the hole position is also formed around the portion corresponding to the position where the bolt insertion hole 30b of the fixing bolt for the suspension cross member body 2a and the support bracket 12 is formed. There is. These thick parts 31a ..., 31
b ... Are formed in an oval shape that is long in the longitudinal direction (vehicle width direction) of the suspension cross member body 2a. When a manufacturing error occurs in the suspension cross member body 2a, the thick portions 31a, 31b, ... Are cut into appropriate dimensions so that the mounting surface 29 of the side frame 1 and the support bracket 12 can be attached. In addition to improving accuracy, each bolt insertion hole 30 within the range of thick parts 31a ..., 31b ...
By allowing the formation positions of a ..., 30b ... to be adjusted, a manufacturing error of the suspension cross member main body 2a is absorbed and the manufacturing accuracy of each of the bolt insertion holes 30a.

Therefore, in the structure described above, the suspension cross member 2 of the double wishbone type independent suspension type suspension main body is formed by casting, so that it is possible to eliminate the need for a large-scale press working facility and reduce the cost. Can be planned. Further, a plurality of reinforcing ribs 20 extending upward and downward are provided on the inner surface of the suspension cross member main body 2a having a substantially U-shaped cross section in a state of being connected between both side surfaces 2b and 2c of the suspension cross member main body 2a. Therefore, the rigidity of the suspension cross member 2 can be increased as compared with the case where the suspension cross member body 2a is formed by pressing a sheet metal material. In this case, in particular, the cross-sectional shape of the suspension cross member body 2a can be changed and the position or number of the reinforcing ribs 20 ... Can be appropriately adjusted according to the attachment component attached to the suspension cross member body 2a. The number of parts that can be mounted on the suspension cross member 2 can be increased as compared with the conventional case. Therefore, the configuration around the installation portion of the suspension cross member 2 can be simplified, and the assembling workability can be improved.

Further, the length of each reinforcing rib 20 is set so that the fixing tool for the engine body 3 such as the torque wrench 21 can be inserted from the lower surface of the suspension cross member body 2a. When mounting the engine body 3, the engine body 3 can be fixed from the lower surface of the suspension cross member body 2a. Therefore, it is not necessary to perform the work for adjusting the tightening torque of the mounting bolts 4a, 4a of the engine mount rubber 4, 4 particularly in the narrow work space around the engine body 3 during the line work. It is possible to improve the workability of the work of adjusting the tightening torque of the mounting bolts 4a, 4a of the screws 4, 4.

The present invention is not limited to the above embodiment, and various modifications can be made without departing from the scope of the present invention.

[Advantage of the Invention] According to the present invention, the suspension cross member of the double wishbone type independent suspension type suspension body is formed by casting, and the suspension cross member has a substantially U-shaped cross section, and the suspension cross member is upwardly and downwardly oriented. A plurality of reinforcing ribs extended to the side of the suspension cross member are connected to both sides of the main body of the suspension cross member, and the length dimension of each reinforcing rib is inserted from the bottom of the suspension cross member body into the tool for fixing the engine body. Since it is set in a possible state, the rigidity is higher than that of a pressed cross suspension member, the number of parts that can be mounted on this suspension cross member is increased, the configuration around the installation part is simplified, and assembly workability is improved. And the engine body is mounted on the suspension cross member. It is possible to improve workability when wearing. In addition, the suspension cross member has a U-shape with an open bottom, and the inner surface of the cross member is provided with a plurality of reinforcing ribs extending in the up-and-down direction in a state where both side surfaces are connected, and in the vicinity of the lower arm mounting part of the suspension body. Since the ribs are formed upward from the lower opening portion of the suspension cross member body, the rigidity of the cross member body is improved by the plurality of reinforcing ribs,
Further, in the vicinity of the mounting portion of the lower arm of the suspension body where the highest strength is required, ribs are formed upward from the lower opening of the suspension cross member to increase the rigidity of the cross member as a completely closed cross section and to provide independent suspension. The function as a device can be ensured.

[Brief description of drawings]

FIG. 1 shows an embodiment of the present invention. FIG. 1 is a front view showing a schematic configuration of the entire suspension body, FIG. 2 is a plan view thereof, FIG. 3 is a side view thereof, and FIG. 4 is a suspension cloth. FIG. 5 is a plan view showing the member, FIG. 5 is a front view thereof, FIG. 6 is a sectional view taken along line VI-VI of FIG. 4, FIG. 7 is a sectional view taken along line VII-VII of FIG. 5, and FIG. FIG. 9 is a sectional view taken along the line VIII-VIII, and FIG. 9 is a sectional view taken along the line IX-IX in FIG. 1 ... Side frame, 2 ... Suspension cross member, 2a ... Suspension cross member body, 3 ...
Engine body, 20 …… Reinforcing ribs, 21 …… Torque wrench (fixing tool).

Claims (1)

[Scope of utility model registration request] 1. In a vehicle suspension device having a double wishbone type independent suspension type suspension main body, a suspension cross member that is installed between both side frames and supports an engine main body is formed by casting and has a sectional shape. Is formed in a substantially U shape with an opening at the bottom, and a plurality of reinforcing ribs extending upward and downward on the inner surface of the body of the suspension cross member are connected between both side surfaces of the suspension cross member body. The reinforcing ribs are provided such that the length dimension of each reinforcing rib is such that a fixing tool for the engine main body can be inserted from the lower opening of the suspension cross member main body, and the reinforcing ribs near the lower arm mounting portion of the suspension main body are reinforced. Ribs are the lower openings of the suspension cross member Vehicle suspension system characterized in that it is extending upward minutes.