Spring member

Abstract

A spring member according to the present invention is provided with: a coil spring in which a wire material is wound in a spiral shape; and a thin plate section that is provided at one end of the coil spring and that receives the load of the coil spring. The thin plate portion has: a thin plate covering a part of one end portion of the coil spring; the insulating part is arranged between the thin plate and the spiral spring; and an adhesive that adheres the insulator and the coil spring to each other. In the thin plate portion, the position of the end portion of the adhesive on one end portion side of the coil spring is located at the edge end portion of the coil spring or closer to the other end portion side than the edge end portion.

Description

Technical Field

[0001] This invention relates to spring components. Background Technology

[0002] A spring component is known, comprising: a helical spring in which wire is wound into a spiral shape, and a thin plate portion disposed at the end of the helical spring and bearing the load of the helical spring (see, for example, Patent Document 1). In this spring component, an elastic insulating member is disposed between the helical spring and the thin plate portion, and the helical spring and the insulating member are fixed by an adhesive.

[0003] Patent document 1: Japanese Patent Application Publication No. 2019-157886. Summary of the Invention

[0004] However, spring components require durability under high loads.

[0005] The present invention was made in view of the above-mentioned problems, and its object is to provide a spring component that can improve the durability against loads.

[0006] To solve the above problems and achieve the objective, the spring component of the present invention comprises: a helical spring formed by winding wire into a helix; and a thin plate portion disposed at one end of the helical spring and bearing the load of the helical spring, the thin plate portion comprising: a thin plate covering a portion of one end of the helical spring; an insulating member disposed between the thin plate and the helical spring; and an adhesive bonding the insulating member to the helical spring, wherein the end of the adhesive on the helical spring end side of the thin plate portion is located at the edge end of the helical spring or at the other end side beyond the edge end.

[0007] Furthermore, in the above invention, the spring component of the present invention is such that, in the thin plate portion, the ends of the insulating member and the adhesive on one end side of the helical spring are respectively located at the edge end of the helical spring or at the other end side closer to the edge end.

[0008] Furthermore, in the spring component of the present invention, the positions of the ends of the insulating member and the adhesive on one end side of the helical spring, relative to the end face of the helical spring, are respectively located in the range from the edge end to the 0.1000th turn.

[0009] Furthermore, in the spring component of the present invention, the position of the end of the adhesive on one end side of the helical spring, relative to the end face of the helical spring, is located in the range from the edge end to the 0.0125th turn.

[0010] According to the present invention, the following effect is achieved: a spring component that can improve the durability against loads is obtained. Attached Figure Description

[0011] Figure 1 This is a diagram showing the structure of a spring component according to one embodiment of the present invention.

[0012] Figure 2 It is Figure 1 A magnified view of a portion of the spring component shown.

[0013] Figure 3 This is a diagram used to illustrate the structure of a conventional spring component, which serves as a reference.

[0014] Figure 4 This diagram illustrates the method of cutting insulating components in the analysis.

[0015] Figure 5 This is a diagram (one of) showing an example of a spring assembly after the insulating portion has been cut off.

[0016] Figure 6 This is a diagram (second example) showing an example of a spring assembly after the insulating portion has been cut off.

[0017] Figure 7 This is a diagram illustrating the analysis results of the spring component in an embodiment of the present invention.

[0018] Figure 8 This is an enlarged view of a portion of the spring component of a modified example 1 of the present invention.

[0019] Figure 9 This is a diagram illustrating the analysis results of the spring component in Modified Example 1.

[0020] Figure 10 This is a cross-sectional view showing a partial structure of the spring component according to a modified example 2 of the present invention. Detailed Implementation

[0021] In the following description, the spring component will be described as an embodiment for carrying out the present invention (hereinafter referred to as "the embodiment"). However, the present invention is not limited to this embodiment. Furthermore, in the accompanying drawings, the same reference numerals are used to denote the same parts. It should also be noted that the drawings are schematic diagrams, and the thickness-to-width ratio, proportions, etc., of each component may differ from reality. Additionally, the drawings may include portions with different dimensions or proportions.

[0022] Implementation Figure 1 This is a diagram showing the structure of a spring component according to one embodiment of the present invention. Figure 2It is Figure 1 The image shows an enlarged view of a portion of the spring component. The spring component 1 includes: a helical spring 2 in which wire is wound into a spiral shape, and a thin plate portion 3 provided at the end of the helical spring 2 and bearing the load of the helical spring.

[0023] The helical spring 2 is formed using, for example, flat spring steel made of metal, resin, etc. In this embodiment, the wire is wound around... Figure 1 The case of the shaft extending in the Z direction is explained below. For ease of explanation, in the helical spring 2, the side with the thin plate portion 3 is designated as the base end side (one end side), and the side opposite to the side with the thin plate portion 3 is designated as the front end side (the other end side). For the helical spring 2, a load is applied to the end of the front end side (the other end side) to press towards the base end side (one end side).

[0024] The thin plate portion 3 includes: a thin plate 31 covering a portion of the base end of the coil spring 2, an insulating member 32 disposed between the thin plate 31 and the coil spring 2, and an adhesive 33 for bonding the insulating member 32 to the coil spring 2.

[0025] The thin plate 31 is concave, covering a portion of the base end of the helical spring 2. The thin plate 31 has a length less than one turn of the helical spring 2, covering the base end of the helical spring 2. Specifically, the thin plate 31 is shaped such that it covers a portion of the side surface of the base end of the helical spring 2, leaving the end face (the surface intersecting the length (extension) direction of the wire) exposed. Therefore, the helical spring 2 may be able to extend in the extension direction due to the elastic deformation of the adhesive 33, etc. Figure 2 The displacement is shown in the Y direction. One turn here corresponds to the amount of one rotation after the wire of the helical spring 2 is wound around the winding shaft once. Hereinafter, the end of the thin plate portion 3 side of the helical spring 2 (the end on the base end side) will be referred to as the base point (turn 0), and the winding position along the winding shaft will be referred to as "turn number X". At this time, the first turn corresponds to the portion of the aforementioned one rotation starting from the base point.

[0026] The insulating element 32 is formed of an elastic material such as rubber. The insulating element 32 is disposed between the thin plate 31 and the coil spring 2 within the disposal area of ​​the thin plate 31.

[0027] Adhesive 33, for example, uses resin.

[0028] In the thin plate portion 3 of this embodiment, the position of the end of the coil spring 2 on the base end side of the insulating member 32 and the adhesive 33 is located within a range that includes the edge end of the coil spring 2 and the side side closer to the wire side than the edge end. The edge end referred to here corresponds to the outer edge portion formed on the end face of the coil spring 2.

[0029] Next, refer to Figures 3-8 The arrangement of the insulating component 32 and the adhesive 33 is described. Here, the results of stress analysis relative to the arrangement range of the insulating component 32 or the adhesive 33 are explained. In the analysis, an analysis model was created for the helical spring 2, the thin plate 31, the insulating component 32, and the adhesive 33. The arrangement, materials, mesh (element generation), interactions (parameters), and boundary conditions were set, and the stress at the interface between the insulating component 32 and the adhesive 33 was calculated. The stress was output as shear stress, and the difference (ratio) relative to the reference was calculated based on this shear stress.

[0030] Figure 3 This is a diagram used to illustrate the structure of a conventional spring component, which serves as a reference. Figure 3 The comparison reference spring component shown includes: a helical spring 2 (see...) Figure 1 ), and a thin plate portion 300 provided at the end of the helical spring 2 and bearing the load of the helical spring.

[0031] The thin plate portion 300 includes: a thin plate 310 covering a portion of the base end of the coil spring 2, an insulating member 320 disposed between the thin plate 310 and the coil spring 2, and an adhesive 330 for bonding the insulating member 320 to the coil spring 2.

[0032] The thin plate 310 is concave, covering a portion of the coil spring 2. The thin plate 310 has a length less than one turn of the coil spring 2, covering the base end of the coil spring 2. Specifically, the thin plate 310 covers a portion of the side surface and a portion of the end face of the coil spring 2. The thin plate 310 is formed using resin or metal material.

[0033] The insulating element 320 is formed of an elastic material such as rubber. The insulating element 320 is disposed between the sheet 310 and the coil spring 2 within the disposal area of ​​the sheet 310.

[0034] Adhesive 330, for example, uses resin.

[0035] Similar to the sheet 310, the insulating element 320 and the adhesive 330 cover a portion of the side surface and a portion of the end face of the helical spring 2.

[0036] Therefore, due to the thin plate portion 300, the helical spring 2 is restricted in the extending direction ( Figure 3 The movement in the Y direction.

[0037] In the analysis, a model of the aforementioned benchmark spring component was created, and the shear stress was calculated.

[0038] Furthermore, in this analysis, the maximum shear stress was calculated for the structure after the end of the insulating member 32 and the end side of the helical spring 2 were cut off. Figure 4This diagram illustrates the method of cutting insulating components during analysis. For example, as shown... Figure 4 As shown with the insulating member 32, the shear stress of each insulating member 32, which has been partially cut off along each dotted line, is analyzed. At this time, the adhesive 33 is also cut in the same way. The cutting here is to move the position of the end of the insulating member 32 and the adhesive 33 on the end side of the coil spring 2 from the base end of the coil spring 2 toward the front end side of the coil spring 2 (along one side of the wire).

[0039] In this analysis, not only were things like... Figure 1 and Figure 2 The model shown includes an insulating component and an adhesive that are located on the same plane as the end face of the helical spring 2, as well as a model of a reference spring component. A model with the insulating component 32 and adhesive 33 partially cut out is also made. Figure 5 and Figure 6 This diagram shows an example of a spring assembly after the insulating portion has been cut. By cutting the insulating portion 32 and the adhesive 33, a spring assembly is created as shown... Figure 5 and Figure 6 The analysis model shown.

[0040] Figure 5 The model 110 shown includes a helical spring 120, which corresponds to the helical spring 2, and a thin plate portion 130A, which corresponds to the thin plate portion 3.

[0041] The thin plate portion 130A includes: a thin plate 131 corresponding to the thin plate 31, an insulating member 132A corresponding to the insulating member 32, and an adhesive 133A corresponding to the adhesive 33. Model 110 is equivalent to... Figure 1 and Figure 2 The model shown is a structure after the insulating part 32 and adhesive 33 have been cut off by 0.0750 (=0.0125×6) turns from the end face of the helical spring 2.

[0042] Figure 6 The model 111 shown includes: a helical spring 120, which corresponds to the helical spring 2, and a thin plate portion 130B, which corresponds to the thin plate portion 3.

[0043] The thin plate portion 130B includes: a thin plate 131 corresponding to the thin plate 31, an insulating member 132B corresponding to the insulating member 32, and an adhesive 133B corresponding to the adhesive 33. Model 111 is equivalent to... Figure 1 and Figure 2 The model shown is a structure after the insulating part 32 and adhesive 33 have been cut off by 0.0375 (=0.0125×3) turns from the end face of the helical spring 2.

[0044] The preferred mesh size and other settings for each component in models 110 and 111 are the same.

[0045] In this analysis, for models located in the same plane (see...) Figure 1 and Figure 2 The shear stress was calculated for the models after removing 0.0375 rings, 0.0750 rings, and 0.1125 rings.

[0046] Figure 7 This is a diagram used to illustrate the analysis results; it shows the analysis results of the model after the insulation and adhesive have been cut. Figure 7 In this context, let sample A be a model located in the same plane (see...). Figure 2 Let sample B be the model after removing 0.0375 circles (see...). Figure 6 Let sample C be the model after removing 0.0750 circles (see...). Figure 5 Let sample D be the model after removing 0.1125 turns, and let the benchmark be the model of the comparison benchmark spring component (see...). Figure 3 ), which represents the ratio of shear stress relative to a reference.

[0047] like Figure 7 As shown, the shear stress of samples A through C is reduced compared to the baseline. Furthermore, the following analysis results were obtained: the models located in the same plane have the lowest shear stress, and the shear stress increases with the number of cuts.

[0048] On the other hand, the following results were obtained: in the model with 0.1125 turns removed (sample D), the shear stress was higher than the baseline. This can be attributed to the reduction in the amount of adhesive 33 (bonding area), which reduces the area of ​​the adhesive 33 subjected to the load from the coil spring 2, thus increasing the shear stress.

[0049] from Figure 7 The results show that the cutting amount of the insulation and adhesive that can reduce the shear stress below the benchmark is from the same plane (circle 0) up to 0.1000 circles.

[0050] In the above embodiment, the positions of the insulating member 32 and the adhesive 33 at the base end of the coil spring 2 in the thin plate portion 3 mounted at the end of the coil spring 2 are located at the edge end of the coil spring 2 or at another end side beyond the edge end, specifically within the range from the 0th turn to the 0.1000th turn, on the same plane as the base end face of the coil spring 2. According to this embodiment, by ensuring that the end positions of the insulating member 32 and the adhesive 33 satisfy the above conditions, when a load is applied to the coil spring 2 toward the thin plate portion 3, damage caused by the edge end of the coil spring 2 embedding into the adhesive 33 or the insulating member 32 can be suppressed. As a result, a spring component with improved load durability can be obtained.

[0051] In addition, according to the embodiment, the amount of insulating material 32 and adhesive 33 used is reduced compared to the past, thereby making the spring component 1 lighter than before.

[0052] Furthermore, according to the embodiment, the above structure can increase the natural vibration number compared to the past, which in turn can further suppress the breakage of the spring component 1.

[0053] Variation Example 1 Next, refer to Figure 8 and Figure 9 A modified example 1 of the embodiments of the present invention will be described. Figure 8 This is an enlarged view of a portion of the spring component in Modification 1. In Modification 1, the structure of the spring component described above, except for the adhesive, is explained. Furthermore, the same symbols are used to denote the same components as in the above embodiment.

[0054] The spring component of this modified example 1 includes: a helical spring 2 in which wire is wound into a spiral shape, and a thin plate portion 3A provided at the end (base end side) of the helical spring 2 and bearing the load of the helical spring.

[0055] The thin plate portion 3A includes: a thin plate 31A covering a portion of the base end of the coil spring 2, an insulating member 32A disposed between the thin plate 31A and the coil spring 2, and an adhesive 33A for bonding the insulating member 32A to the coil spring 2.

[0056] The thin plate 31A is concave, covering a portion of the coil spring 2. The thin plate 31A has a length less than one turn of the coil spring 2, covering the base end of the coil spring 2. Specifically, the thin plate 31A covers a portion of the side surface and a portion of the end face of the coil spring 2.

[0057] The insulating element 32A is formed of an elastic material such as rubber. The insulating element 32A is disposed between the thin plate 31A and the coil spring 2 within the disposal area of ​​the thin plate 31A.

[0058] Adhesive 33A, for example, uses resin. Adhesive 33A covers a portion of the side surface of the helical spring 2, with its end positioned on the same plane as the end face of the helical spring 2.

[0059] In the thin plate portion 3A of this modified example 1, the position of the end of the adhesive 33A on the helical spring 2 side is within the range that includes the edge end of the helical spring 2 and the base end side that is closer to the edge end.

[0060] Figure 9 This is a graph used to illustrate the analysis results; it represents the analysis results of the model after the adhesive has been cut. Figure 9In this context, let sample E be a model located in the same plane (see...). Figure 8 Let sample F be the model after removing 0.0125 turns, and represent the ratio of shear stress relative to the reference. Ideally, for each cut amount including the same plane, a range of ±0.05 relative to the number of cut turns, including manufacturing error, should be set as the effective range.

[0061] like Figure 9 As shown, the shear stress of samples E and F is reduced compared to the baseline. Additionally, the following results were obtained: when only the adhesive is cut, the model with 0.0125 turns removed has lower shear stress compared to the model located in the same plane.

[0062] from Figure 9 Based on the results shown, it can be considered that the amount of cutting when cutting only the adhesive, which can reduce the shear stress below the baseline, is effective at least from the same plane (circle 0) up to 0.0125 circles.

[0063] In the modified example 1 described above, the position of the end of the adhesive 33A on the base end side of the helical spring 2 in the thin plate portion 3A mounted on the base end of the helical spring 2 is located relative to the base end face of the helical spring 2, within a range from the same plane (turn 0) to turn 0.0125. According to this modified example 1, as in the embodiment described above, damage caused by the adhesive 33A embedding into the edge end of the helical spring 2 can be suppressed, resulting in a spring component with improved durability against loads.

[0064] Variation Example 2 Next, refer to Figure 10 A modified example 2 of the embodiments of the present invention will be described. Figure 10 This is a cross-sectional view showing a partial structure of the spring component according to a modified example 2 of the present invention. In modified example 2, the structure of the spring component described above, except for the side of the coil spring 2, is described. Furthermore, the same reference numerals are used for the same constituent elements as in the above embodiment.

[0065] The spring component of this modified example 2 includes: a helical spring 2 in which wire is wound into a spiral shape, and a thin plate portion 3B provided at the base end of the helical spring 2 and bearing the load of the helical spring.

[0066] The thin plate portion 3B includes: a thin plate 31 covering a portion of the base end of the coil spring 2, an insulating member 32B disposed between the thin plate 31 and the coil spring 2, and an adhesive 33B for bonding the insulating member 32B to the coil spring 2.

[0067] The insulating element 32B is formed of an elastic material such as rubber. The insulating element 32B is disposed between the thin plate 31 and the coil spring 2 within the disposal area of ​​the thin plate 31.

[0068] Adhesive 33B, for example, uses resin.

[0069] In the thin plate portion 3B of this Modification Example 2, the position of the end of the coil spring 2 on the base end side of the insulating member 32B and the adhesive 33B is closer to the front end side than the edge end of the coil spring 2. Further, in this Modification Example 2, the insulating member 32B and the adhesive 33B cover a portion of the base end face of the coil spring 2. In this Modification Example 2, the insulating member 32B and the adhesive 33B cover a portion of the base end face of the coil spring 2 and a portion of the side surface on the base end side of the coil spring 2, while exposing a portion of that side surface. At this time, for example, on the side surface of the coil spring 2, the position of the end of the insulating member 32B and the adhesive 33B on the coil spring 2 side is located closer to the front end side than the end face of the coil spring 2 (0th turn) and extends up to 0.1000 turns.

[0070] In this modified example 2, the structure is formed as follows: an insulating member / adhesive is provided at the base end of the helical spring 2, and a portion of the insulating member / adhesive provided on the side connected to the end face of the helical spring 2 is cut off.

[0071] In the modified example 2 described above, in the thin plate portion 3B mounted on the base end of the helical spring 2, the insulating member 32B and the adhesive 33B cover a portion of the base end face and side surface of the helical spring 2, and expose the side surface connected to the end face. According to this modified example 2, as in the above embodiment, damage caused by the adhesive 33B embedding at the edge end of the helical spring 2 can be suppressed, and as a result, a spring component with improved durability against loads can be obtained.

[0072] Thus, the present invention can include various embodiments not described herein, and various design changes can be made without departing from the technical concept defined by the scope of the claims. Furthermore, in the above embodiments or variations 2, the ends of the insulating element and the adhesive do not need to be on the same plane; the ends can be staggered.

[0073] Industrial applicability As described above, the spring component of the present invention is suitable for improving the durability against loads.

[0074] Symbol explanation: 1. Spring component 2. Coil spring 3. 3A, 3B Thin Plate Section 31, 31A Thin Plate 32, 32A, 32B Insulating Components 33, 33A, 33B adhesives.

Claims

1. A spring component, characterized in that, have: A helical spring, which is made by winding wire into a helical shape; and A thin plate portion is located at one end of the helical spring and bears the load of the helical spring. The thin plate portion has: A thin plate that covers a portion of one end of the helical spring; An insulating element disposed between the thin plate and the helical spring; and An adhesive is used to bond the insulating component to the helical spring. In the thin plate portion, the position of the end of the adhesive on one end side of the helical spring is located at the edge end of the helical spring, or on the other end side closer to the edge end.

2. The spring component according to claim 1, characterized in that, In the thin plate portion, the ends of the insulating member and the adhesive on one end side of the helical spring are respectively located at the edge end of the helical spring or on the other end side closer to the edge end.

3. The spring component according to claim 2, characterized in that, The positions of the insulating component and the adhesive, and the ends of the coil spring, are respectively located from the edge end to the 0.1000th turn, relative to the end face of the coil spring.

4. The spring component according to claim 1, characterized in that, The position of the adhesive end on one end side of the helical spring is relative to the end face of the helical spring, located in the range from the edge end to the 0.0125th turn.

Images