JP2011225114A - Suspension device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a suspension device that allows a wheel mounting member to be easily and firmly connected to an end of an axle part comprising pipe materials at a predetermined angle with a simple configuration, and uses a common component for one of the axle part and the wheel mounting member when they are different from each other due to a difference in vehicle type.SOLUTION: The suspension device includes: an axle part 1 comprising pipe materials; and a wheel mounting member 2 connected to the end of the axle part 1 to support a wheel W at a predetermined position. In the suspension device, a connector 22 of the wheel mounting member 2 with respect to the end of the axle part 1, has a curved surface having a curvature d2 that is larger than that of a radius d1 of the end of the axle part 1.

Description

  The present invention relates to an automobile suspension, and more particularly, to a suspension including an axle part made of a pipe material and a wheel mounting member connected to an end of the axle part and supporting a wheel in a predetermined posture. .

  For example, in a torsion beam type suspension, generally, a torsion beam as an axle member, a vehicle body mounting portion for mounting the torsion beam to the vehicle body, and an arm portion of the torsion beam are provided to rotatably support the wheels of the automobile in a predetermined posture. And a wheel mounting member to which a wheel carrier for mounting is mounted.

  Also, in such a suspension, the left and right wheels are generally not parallel in posture, and their rotation center axes are set to close or open at a predetermined slight angle with respect to the traveling direction in plan view of the automobile. (Toe: see symbol T in FIG. 4), and set to close or open at a predetermined slight angle with respect to the vertical when viewed from the front-rear direction of the automobile (Camber: FIG. 5) (See symbol C).

  Further, in the torsion beam type suspension as described above, as shown in FIGS. 4 and 5 of the present application, the torsion beam 1 ′ is formed by bending both ends of the pipe material to form the arm portion 10 ′. The attachment portion 2 ′ includes an insertion portion 22 ′ to be inserted into the arm portion 10 ′ of the torsion beam 1 ′, and the insertion portion 22 ′ of the wheel attachment portion 2 ′ is connected to the open end portion 12 ′ of the arm portion 10 ′. A torsion beam type suspension is known which is inserted into the wheel and has a configuration in which the wheel mounting portion 2 'is welded 4 to the arm portion 10' (Patent Document 1). The wheel mounting portion 2 ′ includes a carrier plate 20 ′ to which a wheel carrier for rotatably supporting the wheel is mounted, and a carrier bracket 21 ′ that is connected to the torsion beam 1 ′ and supports the carrier plate 20 ′. The carrier bracket 21 ′ is bent so that the carrier plate 20 ′ is in a predetermined posture (toe, camber), and the inserted portion 22 is inserted into the distal end opening 12 ′ of the arm portion 10 ′ of the torsion beam 1 ′. 'Is formed.

  Further, in Patent Document 1, as shown in FIG. 4 (partial schematic diagram of FIG. 1), the inserted portion 22a of the carrier bracket 22 is formed in a tubular shape having a cross section as an outer diameter d1, and the outer diameter is d1 is set to be slightly smaller than the inner diameter d2 of the open end portion 11a of the arm portion 11R, whereby the inserted portion 22a is slidably inserted into the open end portion 11a. Thus, the wheel mounting member 12R as a whole can move (slid in this embodiment) in the tube axis direction Y of the arm portion 11R. ”(0032) .

JP 2008-213602 A

  However, in the above-mentioned Patent Document 1, the insertion portion of the carrier bracket is set to be slightly smaller than the inner diameter of the open end of the arm portion, so a torsion beam whose inner diameter has been changed due to different vehicle types is adopted. In this case, there is a problem that a carrier bracket having an outer diameter different from the insertion portion must be prepared in accordance with the torsion beam having a different inner diameter, and the number of parts to be prepared is increased. In Patent Document 1, as shown in FIGS. 4 and 5 of the present application, the wheel mounting member 2 ′ is moved in the longitudinal direction by moving the wheel mounting member 2 ′ as a whole in the tube axis direction Y of the arm portion 10 ′. However, it is difficult to adjust the toe T as shown in a plan view in FIG. 4 of the present application and the camber C as shown in a rear view in FIG. 5 of the present application. Furthermore, in Patent Document 1, if a gap between the insertion portion 22 ′ of the carrier bracket 21 ′ and the inner diameter of the open end portion 12 ′ of the arm portion 10 ′ becomes large due to a molding error, the welding quality is increased. As a result, it is difficult to guarantee the accuracy, and high accuracy is required for forming both 22 'and 12', and there is a problem that it is necessary to weld them firmly.

  The present invention has been made in view of the above-described problems. With a simple configuration, the wheel mounting member is easily adjusted to a predetermined angle with respect to the end of an axle part made of a pipe material, and is firmly connected. In addition, an object of the present invention is to provide a suspension which can be connected correspondingly with a common one even when one of the axle part and the wheel mounting member is different due to different types of vehicles.

  In order to achieve the above object, a suspension according to a first aspect of the present invention includes an axle component made of a pipe material and a wheel mounting member that is connected to an end of the axle component and supports a wheel in a predetermined posture. And the shape of the connection part of the said wheel attachment member with respect to the edge part of the said axle component was made into the curved surface, It is characterized by the above-mentioned.

  According to the invention of claim 1, the shape of the connecting portion of the wheel mounting member is a curved surface, so that even if one of the axle part and the wheel mounting member is different due to different vehicle types, the other is shared. The wheel mounting member can be easily connected to the end of the axle component and firmly fixed to be firmly connected to the end of the axle part.

It is the top view shown in order to demonstrate one Embodiment of the suspension of this invention. In this invention, it is the elements on larger scale of the state which connected the wheel attachment member to the edge part of the torsion beam. In this invention, it is the elements on larger scale seen from the back of the motor vehicle which showed notionally the state which connected the wheel attachment member to the edge part of the torsion beam. In a prior art, it is the elements on larger scale of the state which connected the wheel attachment member to the edge part of the torsion beam. In the prior art, it is the partial expanded side view seen from the back of the motor vehicle which showed the state which connected the wheel attachment member to the edge part of the torsion beam notionally.

One embodiment of the suspension of the present invention will be described based on FIGS. 1 to 3 in the case of a torsion beam suspension.
The suspension of the present invention generally includes an axle part 1 made of a pipe material, and a wheel mounting member 2 that is connected to an end of the axle part 1 and supports the wheel W in a predetermined posture. The shape of the connecting portion 22 of the wheel mounting member 2 relative to the end of the axle part 1 is a curved surface having a curvature d2 larger than the diameter d1 of the end of the axle part 1.

  In the embodiment shown in FIG. 1, the torsion beam 1 as an axle part is formed with an arm portion 10 by bending at a predetermined angle at each predetermined position from both ends of a cylindrical material. The opening 12 opens toward the rear and outside of the automobile. The tip opening 12 is in a state as it is before bending to form the arm portion 10 without particularly processing the pipe-shaped material constituting the torsion beam 1. Each bending portion 11 is provided with a vehicle body attachment member 3 having a bush portion 30 by welding or the like. By pivotally attaching the bush portion 30 to the shaft portion of the vehicle body, the entire torsion beam 1 is attached so as to be rotatable about the bush portion 30 with respect to the vehicle body.

  The wheel mounting member 2 includes a carrier plate 20 to which a wheel carrier for rotatably supporting the wheel W is mounted, and a carrier bracket 21 that is connected to the torsion beam 1 and supports the carrier plate 20. Is bent so that the carrier plate 20 is in a predetermined posture, and is connected to the distal end opening 12 of the arm portion 10 of the torsion beam 1, that is, the end (base end) opposite to the carrier plate. The shape is a hemispherical curved surface. The curvature radius d2 of the curved surface of the connecting portion 22 is set to be larger than the radius d1 of the inner diameter at the distal end opening 12 of the arm portion 10 of the torsion beam 1. Further, as shown in FIG. 1, the wheel mounting member 2 can function so as to support a part of the spring seat 23 and the absorber bracket 24.

  The torsion beam 1 and the wheel mounting member 2 configured as described above have the carrier plate 20 in a posture in which the curved surface of the connecting portion 22 of the carrier bracket 21 is brought into contact with the tip opening 12 of the arm portion 10 of the torsion beam 1. It is adjusted so that a predetermined toe (T in FIG. 2) and a predetermined camber (C in FIG. 3) are obtained, and the distal end opening 12 of the arm portion 10 and the curved surface of the connecting portion 22 of the carrier bracket 21 are fixed by welding 4. Connected. Since the shape of the connection portion 22 connected to the arm portion 10 of the carrier bracket 21 is formed in a curved surface, the posture of the carrier plate 20 becomes a predetermined toe T and a predetermined camber C in a state before welding. (See the arrow t in FIG. 2 and the arrow c in FIG. 3). The curvature radius d2 of the curved surface of the connecting portion 22 of the carrier bracket 21 is set to be larger than the inner diameter d1 of the distal end opening 12 of the arm portion 10 of the torsion beam 1. Since the tip opening 12 is always in contact with each other and no gap is generated between the two ends 22 and 12, the connecting portion 22 'is not required to have high molding accuracy as in the prior art, and welding is ensured. 4 can secure the connection strength between the arm portion 10 and the carrier bracket 21. Even when, for example, the torsion beam 1 in which the inner diameter d1 of the distal end opening 12 of the arm part 10 is different is adopted depending on the vehicle type or the like, the curvature radius d2 of the curved surface of the connection part 22 of the carrier bracket 21 is the arm part of the torsion beam 1. As long as the inner diameter d1 of the ten tip openings 12 is larger, the common wheel mounting member 2 can be connected to the torsion beam 1 having the arm portions 10 having various inner diameters d1.

  The present invention is not limited to the torsion beam type suspension, and the pipe-shaped axle part 1 is used to support the wheel in a predetermined posture (toe T, camber C) regardless of whether it is a front wheel or a rear wheel of an automobile. As long as the wheel mounting member 2 is connected to the end portion of this, it can be applied to other types of suspensions.

  1: torsion beam (axle part), 2: wheel mounting member, 3: vehicle body mounting member, 4: welding, 10: arm portion, 11: bending portion, 12: tip opening, 20: carrier plate, 21: carrier bracket, 22 : Connection part, 30: Bush part, W: Wheel, d1: Inner diameter of tip opening of arm part, d2: Curvature of carrier bracket connection part

Claims (1)

A suspension comprising an axle part made of a pipe material, and a wheel mounting member connected to an end of the axle part and supporting a wheel in a predetermined posture,
A suspension characterized in that a shape of a connection portion of the wheel mounting member with respect to an end portion of the axle part is a curved surface.

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