suspension member

Abstract

A suspension member includes a cylindrical suspension mounting portion fixed to a vehicle body, a rib portion provided on an outer peripheral surface of the suspension mounting portion in a circumferential direction, and a recess portion formed on an inner peripheral surface of the suspension mounting portion in the circumferential direction and within a range of a width of the rib portion in an axial direction.

Description

Technical Field

[0001] This invention relates to a suspension component. Background Technology

[0002] The structure of a suspension component for mounting a motor is disclosed in Japanese Patent Application Publication No. 2012-041009. Conventionally, it is known to use a body bracket to support the suspension component to the vehicle body. The body bracket, also known as a rubber bushing, includes an inner cylinder, an outer cylinder, and an elastic body between the inner and outer cylinders. This elastic body absorbs vibrations caused by the vertical movement of the suspension component relative to the vehicle body. Summary of the Invention

[0003] On the other hand, in order to reduce the number of parts in the vehicle body bracket, when using a resin outer cylinder component, the resin outer cylinder component undergoes large dimensional changes due to temperature. Therefore, in order to ensure pull-out force, a relatively large tightening amount needs to be set. However, if the tightening amount is set too large, the resin outer cylinder component may sometimes break when it is pressed into the suspension mounting part.

[0004] The present invention was made in view of the above circumstances, and its object is to provide a suspension component that can prevent breakage when the resin outer cylinder component is pressed in.

[0005] According to technical solution 1, the suspension component of the present invention comprises: a cylindrical suspension mounting portion fixed to a vehicle body; a rib disposed circumferentially on the outer peripheral surface of the suspension mounting portion; and a recess formed circumferentially on the inner peripheral surface of the suspension mounting portion, and formed within the width of the rib in the axial direction.

[0006] In the suspension component of the present invention as described in technical solution 1, a rib is provided circumferentially on the outer peripheral surface of the suspension mounting portion, and a recess is formed within the width of the rib in the axial direction. This suppresses the reduction of the radial wall thickness of the suspension mounting portion, thus assisting the pull-out force of the resin outer cylinder component with a convex portion formed circumferentially by the recess, thereby ensuring the rigidity of the suspension mounting portion. This also suppresses the expansion of the tightening amount, thus preventing breakage of the resin outer cylinder component during pressing.

[0007] According to technical solution 2, in the structure described in technical solution 1, the corner of the inner surface of one end of the resin outer cylinder component pressed into the suspension mounting part is formed by a convex curved surface.

[0008] In the suspension component of the present invention described in technical solution 2, the corner of the inner surface of one end of the pressed resin outer cylinder component is formed by a convex curved surface. Therefore, when the resin outer cylinder component with a convex part formed in the circumferential direction is pressed in, it is possible to prevent the corner convex part from breaking.

[0009] According to technical solution 3, in the structure described in technical solution 1 or 2, the angle between the first surface of the recess on the side opposite to one end of the resin outer cylinder component and the inner surface of the recess of the suspension mounting part is 15 degrees or more and 30 degrees or less.

[0010] In the suspension component of the present invention described in technical solution 3, the angle between the first surface on the side opposite to one end of the resin outer cylinder component and the recess of the inner surface of the suspension mounting portion is set to 15 degrees or more and 30 degrees or less. Therefore, when the protrusion formed on the outer periphery of the resin outer cylinder component passes through the recess, the protrusion can be prevented from breaking.

[0011] According to technical solution 4, in the structure of any one of technical solutions 1 to 3, the angle between the second surface of the resin outer cylinder component pressed into the recess and the outer surface of the inner surface of the suspension mounting part outside the recess is 80 degrees or more and 100 degrees or less.

[0012] In the suspension component of the present invention described in technical solution 4, the angle between the second surface of one end of the resin outer cylinder component and the recess of the inner surface of the suspension mounting portion is set to 80 degrees or more and 100 degrees or less, thereby suppressing the protrusion formed on the outer periphery of the resin outer cylinder component from disengaging from the recess.

[0013] According to technical solution 5, in the structure of any one of technical solutions 1 to 4, the radial wall thickness of the suspension mounting portion in the recess is formed to be approximately the same as the radial wall thickness of the suspension mounting portion outside the recess.

[0014] In the suspension component of the present invention described in technical solution 5, the radial wall thickness of the suspension mounting portion can be kept constant, thereby maintaining the rigidity of the suspension mounting portion.

[0015] As explained above, the suspension component according to the present invention can prevent cracking of the resin outer cylinder component during pressing. Attached Figure Description

[0016] Hereinafter, with reference to the accompanying drawings, the features, advantages, and technical and industrial significance of exemplary embodiments of the present invention will be described, in which the same reference numerals denote the same elements, and wherein: Figure 1 This is a schematic top view illustrating a suspension component or the like according to an embodiment of the present invention.

[0017] Figure 2 This is a schematic side view of a suspension component or the like according to an embodiment of the present invention.

[0018] Figure 3 This is a perspective view schematically illustrating an example of the structure of the main part of a suspension component according to an embodiment of the present invention.

[0019] Figure 4 It is along Figure 3 A longitudinal sectional view cut along line IV-IV.

[0020] Figure 5 It is a longitudinal sectional view showing a portion of the suspension mounting section of the suspension component. Detailed Implementation

[0021] The following uses Figures 1-5 This document describes a suspension component 10 according to one embodiment of the present invention. Furthermore, in this specification and the accompanying drawings, components having substantially the same functional structure are omitted from repeated description by using the same symbols. In the figures, arrow FR appropriately indicates the front side in the vehicle's front-rear direction, and arrow UP indicates the upper side in the vehicle's vertical direction. Arrow LH indicates the left side in the vehicle's width direction (left-right direction), and arrow RH indicates the right side in the vehicle's width direction (left-right direction). Hereinafter, the directions front-rear, vertical, and left-right will be used simply in the description; unless otherwise specified, these directions refer to front-rear in the vehicle's front-rear direction, vertical in the vehicle's vertical direction, and left-right in the vehicle's left-right direction (vehicle width direction).

[0022] like Figure 1 and Figure 2 As shown, the suspension component 10 of this embodiment is, for example, provided at the rear of the vehicle 12. Various arms (not shown) supporting the left and right rear wheels are mounted on this suspension component 10. Furthermore, in Figure 1 and Figure 2 The diagram omits the portion showing the mounting of various arms on the suspension member 10. Furthermore, a motor 14 for driving the left and right rear wheels is supported on the suspension member 10 via a motor bracket 16. The motor bracket 16 is mounted in a motor bracket mounting hole 40 formed in the upper center beam portion 26 (described later) that extends through the vehicle width direction (see reference). Figure 2 ).

[0023] As an example, the suspension component 10 is formed from die-cast aluminum or the like, forming a structure in which all parts are integrally formed as described later. As an example, the suspension component 10 includes: a pair of left and right side beams 18 extending in the front-rear direction on both sides in the vehicle width direction; a front side crossbeam 20 and a rear side crossbeam 22 connecting the front and rear ends of the pair of left and right side beams 18 in the left-right direction, respectively; and a middle crossbeam 24 connecting the middle portions of the pair of left and right side beams 18 in the front-rear direction in the left-right direction.

[0024] like Figure 1As shown, the portion of the left and right side beams 18 extending from the front end to the center in the front-rear direction has a shape that curves slightly outward in the vehicle width direction as it faces forward when viewed from above. Figure 2 As shown, the middle portion of the left and right side beam portions 18 in the front-rear direction has an upper middle beam portion 26 extending in the front-rear direction and a lower middle beam portion 28 extending in the front-rear direction below the upper middle beam portion 26. An opening 30 is formed between the upper middle beam portion 26 and the lower middle beam portion 28, which passes through in the left-right direction to transmit the rotation of the motor 14 to the drive shaft of the rear wheel.

[0025] like Figure 1 and Figure 2 As shown, a fixing device (reference) is provided at the front end of the left and right pair of side beams 18 for fixing to the vehicle body 11. Figure 4 The front suspension mounting portion 32 is a cylindrical suspension mounting portion. A vehicle body bracket portion 50 (described later) is formed on this front suspension mounting portion 32 by press-fitting. Figure 3 , Figure 4 The front mounting hole 34 is used to fix the vehicle body 11 (see reference) via the vehicle body bracket 50 mounted on the front mounting hole 34. Figure 4 ), which is configured as a front suspension mounting part 32 fixed to the vehicle body 11.

[0026] Furthermore, a rear suspension mounting portion 36, serving as a cylindrical suspension mounting portion fixed to the vehicle body (not shown), is provided at the rear end of a pair of left and right side beam portions 18. A vehicle body bracket portion 50 (described later) is formed on this rear suspension mounting portion 36 by pressing it into it. Figure 3 , Figure 4 The rear mounting hole 38 is used for fixing the vehicle body 11 (see reference) via the vehicle body bracket 50 mounted on the rear mounting hole 38. Figure 4 ), which constitutes a rear-side suspension mounting part 36 fixed to the vehicle body 11.

[0027] like Figure 1 As shown, as an example, the front crossbeam 20 has a shape that curves slightly rearward toward the center in the vehicle width direction when viewed from above, and is mounted between the front suspension mounting portions 32 of the pair of left and right side beams 18. Furthermore, as an example, the rear crossbeam 22 is mounted between the rear suspension mounting portions 36 of the pair of left and right side beams 18. Further, as... Figure 1 and Figure 2 As shown, the middle crossbeam 24 is mounted between the rear ends of the lower middle beam 28 of the left and right side beams 18.

[0028] Here, the front suspension mounting portion 32 and the rear suspension mounting portion 36, which are suspension mounting portions, will be described in detail. In this embodiment, the rear suspension mounting portion 36 will be described below, but the structure of the rear suspension mounting portion 36 can also be applied to the front suspension mounting portion 32.

[0029] like Figure 3 and Figure 4 As shown, in this embodiment, the rear suspension mounting portion 36 is connected to the rear crossbeam portion 22 and the side beam portion 18, and is formed into a cylindrical shape, having a rear mounting fixing hole 38 inside. Figure 5 As indicated by arrow P, the body support portion 50 (described later) is pressed in and supported from the lower side in the vertical direction within the rear mounting hole 38. Figure 3 , Figure 4 ).

[0030] like Figure 4 and Figure 5 As shown, the rear suspension mounting portion 36 has a rib 37 arranged circumferentially on its outer peripheral surface 36A. The rib 37 protrudes outward and has a generally rectangular cross-section. The rib 37 is formed on a width D in the vertical direction, i.e., in the axial direction.

[0031] Furthermore, the rear suspension mounting portion 36 has a circumferentially formed recess 39 on its inner circumferential surface, i.e., the rear mounting hole 38. For example... Figure 5 As shown, the recess 39 is formed within the width D of the rib 37 in the vertical direction, i.e., the axial direction. The recess 39 has an upper surface 39A, a lower surface 39B opposite to the upper surface 39A, and a bottom surface 39C connecting the upper surface 39A and the lower surface 39B and extending in the vertical direction.

[0032] In this embodiment, as an example, the radial wall thickness T1 of the rear suspension mounting portion 36 in the recess 39 is formed to be approximately the same as the radial wall thickness T2 of the rear suspension mounting portion 36 outside the recess 39. Furthermore, here, "approximately the same wall thickness" includes not only wall thicknesses with strictly identical values, but also wall thicknesses with slightly different values ​​within the range of manufacturing tolerances, etc.

[0033] And, as Figure 5 As shown, in the recess 39, the body support portion 50 (described later) is inserted into the recess 39 (see reference). Figure 3 , Figure 4 The angle R1 between the upper surface (first surface) 39A of the side opposite to the lower side of the rear suspension mounting portion 36 and the recess 39 of the inner circumferential surface of the rear mounting hole 38 is, for example, 15 degrees or more and 30 degrees or less. Furthermore, in the recess 39, the body support portion 50 (described later) is inserted into the recess 39. Figure 3 , Figure 4The angle R2 between the lower surface (second surface) 39B of one end side of the rear suspension mounting part 36 and the recess 39 of the inner circumferential surface of the rear mounting fixing hole 38 is, for example, 80 degrees or more and 100 degrees or less.

[0034] Furthermore, in the rear suspension mounting portion 36, the portion 50 that presses into the vehicle body bracket (described later) Figure 3 , Figure 4 The corner 36B of the inner surface of the lower side of the ) is formed by a convex curved surface. That is, as an example, the corner 36B has an R shape.

[0035] In this embodiment, as an example, the front suspension mounting portion 32 and the rear suspension mounting portion 36 are included in the suspension frame member 10, and are integrally formed from aluminum die casting or the like, comprising a pair of left and right side beam portions 18, a front crossbeam portion 20, a rear crossbeam portion 22, and a middle crossbeam portion 24. Therefore, in this embodiment, the inner diameter and casting surface 60 are formed with the corner portion 36B in an R shape. In this embodiment, as an example, such as Figure 5 As shown in the diagram, the casting surface 60 is machined by cutting to form a front mounting hole 34, a rear mounting hole 38, and a recess 39.

[0036] Next, the vehicle body support section 50 will be described. The vehicle body support section 50 is a support member that supports the suspension member 10 to the vehicle body 11; for example, four such sections are provided on the vehicle. Furthermore, the vehicle body support section 50 also functions as a vibration damping member to suppress the transmission of vibrations from the suspension member 10 to the vehicle body 11. Figure 3 and Figure 4 As shown, the vehicle body support portion 50 includes an inner cylinder 52 and a resin outer cylinder component 54 formed of resin. The inner cylinder 52 extends axially in the vertical direction. As an example, the inner cylinder 52 is fastened to the vehicle body 11 by bolts 56 and stud nuts 13.

[0037] As an example, the resin outer cylinder component 54 is formed of heat-resistant resin and is coaxial with the inner cylinder 52. The outer peripheral surface of the inner cylinder 52 and the inner peripheral surface of the resin outer cylinder component 54 have a predetermined gap in the radial direction. The resin outer cylinder component 54 has a flange portion 54A extending radially outward at its lower end. When the vehicle body bracket portion 50 is pressed into the front mounting hole 34 and the rear mounting hole 38, the upper surface of the flange portion 54A abuts against the lower end surface of the front suspension mounting portion 32 and the lower end surface of the rear suspension mounting portion 36.

[0038] Furthermore, the resin outer cylinder component 54 has a protrusion 54B on its outer peripheral surface in the circumferential direction. The protrusion 54B is formed at a position corresponding to the recess 39 of the aforementioned front suspension mounting portion 32 and rear suspension mounting portion 36, and fits into the recess 39. In this embodiment, as an example, the cross-section of the protrusion 54B is formed to be approximately rectangular.

[0039] As described above, the body bracket 50 is pressed into the front mounting hole 34 and the rear mounting hole 38, and the resin outer cylinder component 54 is respectively engaged (fixed) to the front suspension mounting part 32 and the rear suspension mounting part 36.

[0040] (Functions and Effects) Next, the effects of this embodiment will be explained.

[0041] In the vehicle body bracket section, in order to reduce the number of parts, when a resin outer cylinder component is used, the resin outer cylinder component undergoes large dimensional changes due to temperature. Therefore, in order to ensure pull-out force, the tightening amount needs to be set relatively large. However, if the tightening amount is set too large, the resin outer cylinder component may sometimes break when it is pressed into the suspension mounting part.

[0042] Therefore, in the suspension component 10 according to this embodiment, ribs 37 are provided circumferentially on the outer peripheral surfaces of the suspension mounting portions, namely the front suspension mounting portion 32 and the rear suspension mounting portion 36, and recesses 39 are formed within the width D of the ribs 37 in the vertical direction, i.e., the axial direction. This suppresses the reduction in radial wall thickness of the suspension mounting portions, namely the front suspension mounting portion 32 and the rear suspension mounting portion 36, thus assisting in the pull-out force of the resin outer cylinder component 54, for which protrusions 54B are formed circumferentially through the recesses 39, thereby ensuring the rigidity of the front suspension mounting portion 32 and the rear suspension mounting portion 36. This also suppresses the expansion of the tightening amount, thus preventing breakage of the resin outer cylinder component during pressing.

[0043] Furthermore, in the suspension component 10 of this embodiment, the corner 36B of the inner surface of one end side (lower side) of the resin outer cylinder component 54 is formed by a convex curved surface. Therefore, when the resin outer cylinder component 54 with the protrusion 54B formed in the circumferential direction is pressed in, it is possible to prevent the protrusion 54B at the corner 36B from breaking.

[0044] Furthermore, in the suspension member 10 according to this embodiment, as an example, the angle R1 between the upper surface (first surface) 39A on the side opposite to one end (lower side) of the resin outer cylinder member 54 and the recess 39 of the inner surface of the rear suspension mounting portion 36, i.e., the inner peripheral surface of the rear mounting fixing hole 38, is formed to be 15 degrees or more and 30 degrees or less. Therefore, when the protrusion 54B formed on the outer periphery of the resin outer cylinder member 54 passes through the recess 39, it is possible to prevent the protrusion 54B from breaking.

[0045] Furthermore, in the suspension member 10 according to this embodiment, as an example, the angle R2 between the lower surface (second surface) 39B of one end side (lower side) of the resin outer cylinder member 54 and the recess 39 of the inner circumferential surface of the rear suspension mounting portion 36, i.e., the inner circumferential surface of the rear mounting fixing hole 38, is formed to be 80 degrees or more and 100 degrees or less. Therefore, it is possible to prevent the protrusion 54B formed on the outer circumference of the resin outer cylinder member 54 from disengaging from the recess 39 to the lower side.

[0046] Furthermore, in the suspension component 10 according to this embodiment, the radial wall thickness of the suspension mounting portion, namely the front suspension mounting portion 32 and the rear suspension mounting portion 36, can be kept constant, thus maintaining the rigidity of the suspension mounting portion, namely the front suspension mounting portion 32 and the rear suspension mounting portion 36.

[0047] Supplementary Explanation Furthermore, in the above embodiment, the cross-section of the rib 37 is formed to be approximately rectangular, but the shape of the rib 37 is not limited to approximately rectangular; the shape is not limited. Also, in the above embodiment, the rib 37 is continuously provided along the circumferential direction, but the present invention is not limited to this. For example, it can be provided intermittently. Even in the case of intermittent provision, rigidity can be increased compared to a method without ribs 37.

[0048] Furthermore, in the above embodiment, the radial wall thickness T1 of the rear suspension mounting portion 36 in the recess 39 is formed to be approximately the same as the radial wall thickness T2 of the rear suspension mounting portion 36 outside the recess 39, but the present invention is not limited thereto. For example, the radial wall thickness T1 of the rear suspension mounting portion 36 in the recess 39 may be formed to be thicker than the radial wall thickness T2 of the rear suspension mounting portion 36 outside the recess 39, or it may be formed to be thinner. From the viewpoint of rigidity, it is preferable to form it to be thicker than thinner.

[0049] Furthermore, the structure of the present invention is not limited to the above-described embodiments; the structure can be appropriately modified as long as the problem can be solved.

Claims

1. A suspension component, characterized in that, have: A cylindrical suspension mount that is fixed to the vehicle body; Ribs, which are circumferentially disposed on the outer peripheral surface of the suspension mounting portion; and A recess is formed along the circumferential direction on the inner circumferential surface of the suspension mounting portion, and is formed within the width of the rib in the axial direction.

2. The suspension component according to claim 1, characterized in that, In the suspension mounting part, the corner of the inner surface of one end of the resin outer cylinder component is formed by a convex curved surface.

3. The suspension component according to claim 1, characterized in that, In the recess, the angle between the first surface of the recess on the side opposite to one end of the resin outer cylinder component and the inner surface of the suspension mounting part is 15 degrees or more and 30 degrees or less.

4. The suspension component according to claim 1, characterized in that, In the recess, the angle between the second surface of the resin outer cylinder component pressed into one end and the outer surface of the inner surface of the suspension mounting part outside the recess is 80 degrees or more and 100 degrees or less.

5. The suspension component according to claim 1, characterized in that, In the recess, the radial wall thickness of the suspension mounting portion is formed to be approximately the same as the radial wall thickness of the suspension mounting portion outside the recess.

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