JP2019148273A - Spring for suspension - Google Patents

Abstract

To disclose one embodiment of a spring for a suspension which can avoid that a spring part constituted of a metal-made wire rod is early damaged.SOLUTION: A spring comprises: a metal-made wire rod 2A for constituting a spring part 2 being the wire rod 2A in which a coating layer is formed on a surface; and a rubber-made seat part 3 for receiving a load acting on the spring part 2 being the seat part 3 having a groove part 3A into which the wire rod 2A is fit, and attached to the wire rod 2A with an adhesive. A recess 4 having a width dimension W2 narrower than a groove width W1 of the groove part 3A is formed at an inner wall face of the groove part 3A. By this constitution, a worker who manufactures the spring places the wire rod 2A in the groove part 3A after placing the adhesive in the recess 4. Therefore, in the spring, a quantity of the adhesive which protrudes from an adhesion face may be reduced compared with the case that the wire rod 2A is placed in a coated region after the adhesive is entirely applied to the groove part 3A.SELECTED DRAWING: Figure 3

Description

  The present disclosure relates to a spring used in a vehicle suspension device.

  For example, in the invention described in Patent Document 1, a metal coil spring and a plastic holding member are bonded via an adhesive. In the present invention, after the adhesive is applied to the holding member, the coil spring is mounted on the applied portion, whereby the coil spring is bonded to the holding member.

JP 2017-15249 A

In the suspension device spring described in Patent Document 1, the coil spring may be damaged early for the following reason.
That is, after the adhesive is applied to the holding member, when the coil spring is placed on the applied portion, a part of the applied adhesive protrudes from the bonding surface between the coil spring and the holding member. It is very likely that

  Cracks occur between the adhesive protruding from the adhesive surface (hereinafter referred to as the protruding portion) and the adhesive existing on the adhesive surface (hereinafter referred to as the adhesive layer) due to vehicle vibration or secular change. May break from the adhesive layer.

  In the case where the protruding portion is broken, if the load is applied to the coil spring and the coil spring and the holding member are deformed, the protruding portion is displaced relative to the coil spring. When the protruding portion is displaced with respect to the coil spring, the broken portion of the protruding portion and the coil spring rub against each other.

If the breakage portion of the protruding portion and the coil spring rub against each other, the coating layer provided on the surface of the coil spring is damaged, so that the coil spring is damaged early from the damaged portion.
In view of the above points, the present application discloses an example of a spring for a suspension device that can suppress early damage to a spring portion made of a metal wire.

  The spring used in the vehicle suspension device is a metal wire (2A) constituting the spring portion (2), and acts on the wire (2A) having a coating layer on the surface and the spring portion (2). The sheet portion (3) is a rubber sheet portion (3) that receives a load to be applied and has a groove portion (3A) in which the wire (2A) is fitted, and is bonded to the wire (2A) with an adhesive. With.

  The inner wall surface of the groove portion (3A) is, for example, a recess (4) having a width dimension (W2) smaller than the groove width (W1) of the groove portion (3A), and can store an adhesive. It is desirable that a possible recess (4) is provided.

  Thus, a person who manufactures the suspension device spring can place the wire (2A) in the groove (3A) after placing the adhesive in the recess (4). Therefore, in the suspension device spring, after the adhesive is applied to the entire groove portion (3A), the adhesive material protruding from the adhesive surface is compared to the case where the wire (2A) is placed on the applied portion. It may be possible to reduce the amount. As a result, since the protruding portion is prevented from breaking from the adhesive layer, early damage to the spring portion due to the breaking of the protruding portion is suppressed.

  Incidentally, the reference numerals in the above parentheses are examples showing the correspondence with the specific configurations described in the embodiments described later, and the present invention is limited to the specific configurations indicated by the reference numerals in the parentheses. It is not something.

It is a figure which shows the spring which concerns on 1st Embodiment. It is a figure which shows the sheet | seat part in 1st Embodiment. It is a figure which shows the characteristic of the spring which concerns on 1st Embodiment. It is a figure which shows the characteristic of the sheet | seat part which concerns on 1st Embodiment. FIGS. 5A and 5B are diagrams illustrating characteristics of the sheet portion according to the first embodiment. FIGS.

  The following “Embodiments of the Invention” show examples of embodiments belonging to the technical scope of the present invention. In other words, the invention specific items described in the claims are not limited to the specific configurations and structures shown in the following embodiments.

  In addition, the arrow etc. which show the direction attached | subjected to each figure were described in order to make it easy to understand the relationship between each figure. The invention described in the present specification is not limited to the directions given to the drawings.

  At least one member or part described with at least a reference numeral is provided, except where “one” or the like is cut off. That is, when there is no notice such as “one”, two or more members may be provided.

(First embodiment)
In this embodiment, the suspension device spring and the suspension device rubber seat are applied to a suspension device for a front wheel of a vehicle.

1. Configuration of Suspension Device Spring and Suspension Device Rubber Sheet The suspension device spring 1 shown in FIG. 1 (hereinafter referred to as spring 1) includes at least a spring portion 2, a seat portion 3, and the like.

  The spring part 2 is a spring composed of a metal wire 2A. A coating layer 2B that covers the entire wire 2A is provided on the surface of the wire 2A. In addition, the spring part 2 which concerns on this embodiment is a coil spring shape | molded by the coil shape. The coating layer 2B is a thin film formed of a resin such as a thermosetting resin.

  The seat portion 3 is an example of a rubber sheet for a suspension device that receives a load acting on the spring portion 2. The sheet portion 3 is made of an elastically deformable resin such as rubber. As shown in FIG. 2, the sheet portion 3 is provided with a groove portion 3A into which the wire 2A is fitted.

  The groove 3A is a groove into which the wire 2A constituting the end winding part is fitted. That is, the seat portion 3 is disposed at one end in the axial direction of the spring portion 2 configured in a coil shape, and comes into contact with the wire 2A constituting the end winding portion (see FIG. 1). The wire 2A according to the following is a portion constituting the end winding portion of the wire 2A.

  The wire 2A is bonded to the sheet portion 3, that is, the inner wall surface of the groove 3A with an adhesive. Therefore, an adhesive layer AD made of the adhesive is formed between the wire 2A and the inner wall surface of the groove 3A as shown in FIG.

  As shown in FIG. 4, at least one recess 4 is provided on the inner wall surface of the groove 3 </ b> A. The width dimension W2 of the recess 4 is smaller than the groove width W1 of the groove 3A. In the adhesive application process described later, the adhesive Adh is applied to the recess 4. For this reason, the adhesive has accumulated in the recess 4A.

  In addition, the recessed part 4 which concerns on this embodiment is comprised including 4 A of 1st recessed parts, several 2nd recessed parts 4B, etc., as FIG. 2 shows. 4 A of 1st recessed parts are groove-shaped recessed parts extended along the said groove part 3A in the bottom part of the groove part 3A. Each second recess 4B is a recess extending in the groove width direction from the first recess 4A.

2. Adhesion method between wire and sheet part Adhesion between the sheet part 3, that is, the inner wall surface of the groove part 3A, and the wire 2A is performed by an adhesion method including at least the following steps.

  (1) A person who performs a bonding operation or a bonding work apparatus (hereinafter referred to as an operator or the like) first applies a predetermined amount of adhesive to the recess 4, that is, the first recess 4A and the second recess 4B. . The “predetermined amount” is an amount determined by a test or the like.

  (2) Next, the operator places the spring part 2 on which the coating layer 2B has already been formed on the sheet part 3 so that the wire 2A is brought into contact with the inner wall of the groove part 3A. A mounting step is performed in which the unit 3 is pressed for a predetermined time with a predetermined pressing force.

  Thereby, the adhesive applied (placed) on the recess 4 spreads over the entire inner wall surface along the inner wall surface of the groove 3A. Then, an operator etc. enforces the adhesive agent hardening process which heats the spring 1 for the predetermined time in the atmosphere of predetermined temperature. In addition, a hardening process may be enforced in normal temperature atmosphere.

3. Features such as a spring according to this embodiment A person who manufactures the spring 1, that is, an operator or the like, can place the wire 2 </ b> A in the groove 3 </ b> A after placing the adhesive Adh in the recess 4. Therefore, in the spring 1, the adhesive is applied to the entire groove portion 3 </ b> A, and then protrudes from the adhesive surface as compared with the case where the wire 2 </ b> A is placed on the applied portion (the spring described in Patent Document 1). It may be possible to reduce the amount of adhesive. As a result, since the protruding portion is prevented from breaking from the adhesive layer AD, early damage of the spring portion due to the breaking of the protruding portion is suppressed.

(Second Embodiment)
The cross-sectional shape of the recess 4 (particularly, the first recess 4A) according to the above-described embodiment was a semicircular shape. On the other hand, the cross-sectional shape of the recessed part 4 which concerns on this embodiment is other shapes other than semicircle shape. Specifically, for example, as shown in FIG. 5A or FIG. 5B, it is triangular or trapezoidal.

Note that the same constituent elements as those of the above-described embodiment are denoted by the same reference numerals as those of the above-described embodiment, and thus redundant description is omitted.
(Other embodiments)
4 A of 1st recessed parts which concern on the above-mentioned embodiment were groove-shaped recessed parts extended along 3 A of groove parts. However, the invention disclosed in this specification is not limited to this. That is, for example, the first recess 4A may be configured by a plurality of recesses scattered along the groove 3A. The configuration in which the second recess 4B is abolished, or the first recess 4A may be configured by one recess.

  Furthermore, the present invention is not limited to the above-described embodiment as long as it matches the gist of the invention described in the claims. Therefore, you may combine at least 2 embodiment among several embodiment mentioned above.

DESCRIPTION OF SYMBOLS 1 ... Spring for suspension apparatus 2 ... Spring part 2A ... Wire 2B ... Covering layer 3 ... Sheet part 3A ... Groove part 4 ... Concave part

Claims (2)

In springs used in vehicle suspension systems,
A metal wire constituting the spring portion, the wire provided with a coating layer on the surface;
A rubber sheet portion that receives a load acting on the spring portion, and has a groove portion into which the wire is fitted, and a sheet portion bonded to the wire with an adhesive,
The suspension device spring, wherein an inner wall surface of the groove portion is provided with a recess portion having a width dimension smaller than the groove width of the groove portion and storing an adhesive. A rubber sheet that receives a load acting on the spring part, and has a groove part that constitutes the spring part and is fitted with a metal wire provided with a coating layer on the surface, and is bonded with an adhesive. In the rubber sheet for the suspension device bonded to the wire,
A rubber sheet for a suspension device, wherein a concave portion having a width smaller than the groove width of the groove portion is provided on an inner wall surface of the groove portion.

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