Component combination structure

Abstract

The present invention provides a component coupling structure which can be coupled and fixed with high strength without increasing the number of components and which can be disassembled and reused after coupling. The present invention is a member coupling structure in which a first member and a second member are coupled, the second member being formed in a hollow shape and having a cross-sectional inner peripheral shape different from the cross-sectional outer peripheral shape of the first member, the end portion of the first member being inserted inside the end portion of the second member, and the end portion of the second member being inserted inside the end portion of the second member. The end portion of the second member elastically deforms radially outward.

Description

Technical Field

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

[0002] Patent document 1 discloses a connector structure in which a connecting tube with an annular anti-detachment component is inserted into both sides of the connector body. In order to prevent the tube from falling off, the end portion of the connector body is crushed toward the outer periphery of the tube in a manner that surrounds the outer periphery of the anti-detachment component.

[0003] Patent Document 1: Japanese Patent Application Publication No. 2009-257446 Summary of the Invention

[0004] In Patent Document 1, an anti-detachment component is required to prevent the component (tube) from falling off, increasing the number of parts. Furthermore, due to the crushing of the connector body, disassembly and reuse after assembly become difficult.

[0005] To address this problem, the present invention provides a component bonding structure that can be bonded and fixed with high strength without increasing the number of parts, and can be disassembled and reused after bonding.

[0006] The present invention is a component combination structure, which is formed by combining a first component and a second component. The second component is hollow and the inner circumferential shape of its cross-section is different from the outer circumferential shape of the cross-section of the first component. In the component combination structure, the end of the first component is inserted into the inner side of the end of the second component, and the end of the second component elastically deforms radially outward.

[0007] This structure allows for high-strength bonding and fixation without increasing the number of parts, and the parts can be disassembled and reused after bonding.

[0008] With their respective axial centers aligned on the same straight line, the first component and the second component overlap axially at their ends. This structure allows the end of the second component to elastically deform radially outward.

[0009] A chamfer is formed on the outer periphery of the end of the first component, and the overlapping portion is formed on the chamfer. With this structure, the end of the first component can be inserted into the inner side of the end of the second component.

[0010] The outer layer of the second component is made of a metallic material, and the inner layer of the second component is made of a resin material. This structure enables a high-strength bond and fixation.

[0011] The present invention is a component combination structure, which is formed by combining a third component and a fourth component. The third component is hollow, and the outer periphery shape of the cross section of the fourth component is different from the inner periphery shape of the cross section of the third component. In the component combination structure, the end of the fourth component is inserted into the inner side of the end of the third component, and the end of the fourth component elastically deforms radially inward.

[0012] This structure allows for high-strength bonding and fixation without increasing the number of parts, and the parts can be disassembled and reused after bonding.

[0013] Invention Effects

[0014] This invention provides a component bonding structure that can be bonded and fixed with high strength without increasing the number of parts, and can be disassembled and reused after bonding. Attached Figure Description

[0015] Figure 1 This is a perspective view of the first and second components before assembly, showing the assembly structure of the components in Embodiment 1.

[0016] Figure 2 Viewed from the direction of the arrow Figure 1 The main view.

[0017] Figure 3 Observed from direction III Figure 2 A sectional view.

[0018] Figure 4 This is a diagram illustrating the connection structure of the components in Embodiment 1, used to explain the connection method between the first component and the second component.

[0019] Figure 5 This is a partial cross-sectional view showing the assembly structure of the components in Embodiment 1.

[0020] Figure 6 This is a perspective view of the first and second components before assembly, representing the assembly structure of the components in Embodiment 2.

[0021] Figure 7 Viewed from the direction of the arrow Figure 6 The main view.

[0022] Figure 8 This is a front view showing the assembly structure of the components in Embodiment 2.

[0023] Figure 9 (a) is a perspective view of the first and second components before assembly, showing the assembly structure of the components in embodiment 3. Figure 9 (b) is viewed from the IXb direction. Figure 9 (a) is a cross-sectional view of the second component. Figure 9 (c) is a partial cross-sectional view showing the assembly structure of the components in Embodiment 3. Detailed Implementation

[0024] The following uses Figures 1 to 8 The embodiments of the present invention will be described. Figure 1 This is a perspective view of the first and second components before assembly, showing the assembly structure of the components in Embodiment 1. Figure 2 Viewed from the direction of the arrow Figure 1 The main view. Figure 3 Observed from direction III Figure 2 A sectional view. Figure 4 This is a diagram illustrating the connection structure of the components in Embodiment 1, used to explain the connection method between the first component and the second component. Figure 5 This is a partial cross-sectional view showing the assembly structure of the components in Embodiment 1. Figure 6 This is a perspective view of the first and second components before assembly, representing the assembly structure of the components in Embodiment 2. Figure 7 Viewed from the direction of the arrow Figure 6 The main view. Figure 8 This is a front view showing the assembly structure of the components in Embodiment 2. Figure 9 (a) is a perspective view of the first and second components before assembly, showing the assembly structure of the components in embodiment 3. Figure 9 (b) is viewed from the IXb direction. Figure 9 (a) is a cross-sectional view of the second component. Figure 9 (c) is a partial cross-sectional view showing the assembly structure of the components in Embodiment 3.

[0025] Implementation Method 1

[0026] The assembly structure of the components involved in Embodiment 1 is composed of a first component 10 and a second component 20. (Usage) Figures 1-3 The first component 10 and the second component 20 before assembly will be described.

[0027] The first component 10 is a circular steel tube formed from steel material, with a hollow circular cross-section. A chamfered portion 13 with a C-surface is formed on the outer periphery of the end 11 of the first component 10. The chamfered portion 13 is formed along the entire circumference of the first component 10. Alternatively, the chamfered portion 13 may be an R-surface. The outer diameter of the first component 10, except for the end 11 where the chamfered portion 13 is formed, is the same diameter in the axial direction. The inner diameter of the first component 10 is also the same diameter in the axial direction.

[0028] The second component 20 is formed from steel and is a square steel tube with a hollow quadrilateral cross-section. That is, the inner circumference of the cross-section of the second component 20 is quadrilateral, which is different from the outer circumference (circular) of the cross-section of the first component 10.

[0029] A notch 23 is formed at the end 21 of the second component 20. The notch 23 is formed on all four sides of the second component 20, and they are all identical in shape. The notch 23 is formed in the circumferential direction of each side. Figure 3 The notch 23 is located at the center of the second component 20 (vertical direction), and is a portion cut off to a predetermined length from the front end of the second component 20 to the center 22 side. The notch 23 is located on the end 21 side of the second component 20. Figure 3 The left side) is formed of the same length in the circumferential direction of the tube, and the central part 22 side of the second component 20 extends from the end 21 side toward the central part 22 side ( Figure 3 The circumferential length of the tube (on the right side) gradually decreases. That is, notch 23 is cut into a roughly U-shape in the side view of the second component 20.

[0030] like Figures 1-3 As shown, the second component 20 has an edge portion 23a and a front portion 23b. The edge portion 23a is the edge portion where the inner peripheral wall 20a of the second component 20 intersects with the inner wall 20b facing the notch 23. The front portion 23b is the front end portion of the edge portion 23a in the length direction.

[0031] like Figure 1 , Figure 2 As shown, when the first component 10 and the second component 20 are aligned on the same straight line, an overlapping portion, namely the overlapping portion L1, is formed between the end 11 of the first component 10 and the end 21 of the second component 20 in the axial direction. Figure 2 (The shaded area shown). Specifically, as... Figure 2 As shown, an overlapping portion L1 is formed between the chamfered portion 13 of the end 11 of the first component 10 and the four corner portions of the end 21 of the second component 20, excluding the notch 23. The overlapping portion L1 is formed on the opposite outer peripheral side in the first component 10 and on the opposite inner peripheral side in the second component 20.

[0032] To generate the overlapping portion L1, such as Figure 2 As shown, the straight-line distance (hereinafter referred to as the distance between the front ends 23b) between the two parts separated by the axis center C of the second part 20 is less than the outer diameter D11 of the first part 10. Furthermore, in order to provide the overlapping portion L1 only at the chamfered portion 13, as... Figure 2 As shown, the distance D21 between the front ends is less than the outer diameter D11 of the first component 10 and greater than the minimum inner diameter D13 of the chamfered portion 13 of the first component 10.

[0033] Next, use Figure 4 , Figure 5 The joining method of the joining structure 30 of the components according to Embodiment 1 will be described. If the second component 20 is fixed and the first component 10 is brought close to the second component 20, then as follows... Figure 4 As shown, the first component 10 is in contact with the second component 20. Specifically, the chamfered portion 13 of the first component 10 is in contact with the front end portion 23b of the second component 20. The outer diameter D11 of the first component 10 is larger than the distance D21 between the front ends, but since the chamfered portion 13 is formed on the first component 10, the end portion 11 of the first component 10 can be inserted into the inside of the end portion 21 of the second component 20.

[0034] If the end 11 of the first component 10 is inserted into the inside of the end 21 of the second component 20, the front end 23b of the second component 20 receives a reaction force from the chamfered portion 13 of the first component 10, and the end 21 of the second component 20 expands radially outward. The magnitude F1 of the force F1 of the end 21 of the second component 20 expanding radially outward is expressed by the following formula (1).

[0035] F1=F·cosθ1……Equation (1)

[0036] F is the reaction force that the front end 23b receives from the chamfered portion 13 when the end 11 of the first component 10 is inserted into the inside of the end 21 of the second component 20. θ1 is the angle of the chamfered portion 13.

[0037] like Figure 5 As shown, if the end 11 of the first component 10 is inserted into the inner side of the end 21 of the second component 20, the end 21 of the second component 20 expands radially outward and elastically deforms. The rigidity of the end 21 of the second component 20 decreases due to the notch 23, making it easier to expand. The end 11 of the first component 10 is inserted until the end 21 of the second component 20 elastically deforms radially outward. Thus, the end 11 of the first component 10 is inserted into the inner side of the end 21 of the second component 20, forming the component joining structure 30.

[0038] At the end 21 of the second component 20, a restoring force is generated radially inward through elastic deformation to the radially outward. Specifically, at the edge 23a of the second component 20, which contacts the outer peripheral surface of the end 11 of the first component 10, a force is generated in the right-angle direction ( Figure 5 The restoring force is the force in the direction indicated by arrow F2. The magnitude of the restoring force F2 is expressed by the following equation (2) according to Hooke's Law.

[0039] F2=kX……Equation (2)

[0040] k is the Young's modulus of the second component 20. X is the displacement of the end 21 of the second component 20 (in...). Figure 5 In the diagram, a single-dotted line indicates the position of the edge 23a of the end 21 of the second component 20 before elastic deformation.

[0041] The first component 10 and the second component 20 are fixed together with high strength by the restoring force F2. Furthermore, if the first component 10 or the second component 20 is pulled out with a force greater than the restoring force F2, the first component 10 and the second component 20 can be disassembled. After disassembly, the end 21 of the second component 20 returns to its original shape and can therefore be reused.

[0042] Thus, the bonding structure 30 of the components of the present invention can be bonded and fixed with high strength without the need for anti-detachment components or other parts, and can be disassembled and reused after bonding. In addition, if the coefficient of friction of the contact surface between the first component 10 and the second component 20 is large, the frictional force also contributes to the fixing force of the bonding structure of the components.

[0043] Furthermore, in the component joining structure 30 of the present invention, when the first component 10 and the second component 20 before joining are aligned on the same straight line, an overlap portion L1 is formed between the end 11 of the first component 10 and the end 21 of the second component 20 in the axial direction. By providing the overlap portion L1, the end 21 of the second component can be elastically deformed radially outward.

[0044] Furthermore, in the component joining structure 30 of the present invention, the first component 10 and the second component 20 before joining have an overlapping portion L1 formed at the chamfered portion 13. By providing the overlapping portion L1 at the chamfered portion 13, the end portion 11 of the first component 10 can be inserted into the inside of the end portion 21 of the second component 20.

[0045] In Embodiment 1, the cross-section of the first component is a hollow circular steel tube, but it can also be solid. Furthermore, the outer perimeter shape of the cross-section of the first component can be a polygonal shape such as a triangle or a quadrilateral shape instead of a circle.

[0046] In Embodiment 1, the cross-section of the second component is set as a hollow quadrilateral square steel tube, but it can be any shape as long as the inner circumferential shape of the cross-section is different from the outer circumferential shape of the cross-section of the first component. For example, if the outer circumferential shape of the cross-section of the first component is circular, the inner circumferential shape of the cross-section of the second component can also be set as a hollow polygon such as a triangle or hexagon.

[0047] In Embodiment 1, both the first and second components are made of steel, but they can also be made of other metals such as aluminum or resin. The first and second components can also be made of different materials. The bonding force of the component bonding structure of the present invention varies according to the Young's modulus of the second component, therefore the bonding force can be adjusted by selecting the material of the second component. For example, by changing the second component from steel, which has a high Young's modulus, to aluminum, which has a low Young's modulus, the bonding force can be reduced.

[0048] In embodiment 1, a notch is provided in the second component to reduce the rigidity of the end, but rigidity can also be reduced by other methods such as thinning the plate thickness of the second component. Alternatively, the notch may not be provided, thus not reducing rigidity.

[0049] Implementation Method 2

[0050] Next, use Figures 6-8 The connection structure of the components according to Embodiment 2 will be described. The connection structure of the components according to Embodiment 2 is composed of a third component 40 and a fourth component 50. First, using... Figure 6 , Figure 7 The third component 40 and the fourth component 50 before assembly will be explained.

[0051] The third component 40 is a circular steel tube formed from steel material with a hollow circular cross-section. A chamfered portion 43 with a C-surface is formed on the inner circumference of the end 41 of the third component 40. The chamfered portion 43 is formed throughout the entire circumference of the third component 40.

[0052] The fourth component 50 is formed from steel and is a polygonal steel tube with a hollow hexagonal cross-section. That is, the outer perimeter of the cross-section of the fourth component 50 is hexagonal, which is different from the inner perimeter (circular) of the cross-section of the third component 40. The fourth component 50 has a vertex 53. Vertex 53 is the vertex of the hexagon on the outer perimeter of the fourth component 50.

[0053] like Figure 6 , Figure 7 As shown, when the axial centers C of the third component 40 and the fourth component 50 are located on the same straight line, an overlapping portion, namely the overlapping portion L2, is formed between the end 41 of the third component 40 and the end 51 of the fourth component 50 in the axial direction. Figure 7 (The shaded area shown). Specifically, as... Figure 7 As shown, an overlapping portion, namely the overlapping portion L2, is formed between the chamfered portion 43 of the end 41 of the third component 40 and the end 51 of the fourth component 50. The overlapping portion L2 is formed on the opposite inner peripheral side in the third component 40 and on the opposite outer peripheral side in the fourth component 50.

[0054] To generate the overlapping portion L2, such as Figure 7 As shown, the straight-line distance (hereinafter referred to as the distance between vertices) D53 between the vertices 53 connected by the axis center C of the fourth component 50 is greater than the inner diameter D41 of the third component 40. Furthermore, in order to provide an overlapping portion L2 only at the chamfered portion 43, as... Figure 7 As shown, the distance D53 between the vertices is made greater than the inner diameter D41 of the third component 40 and less than the maximum outer diameter D43 of the chamfered portion 43 of the third component 40.

[0055] Next, the joining method of the component joining structure according to Embodiment 2 will be described. If the third component 40 is fixed and the fourth component 50 is brought close to the third component 40, the chamfered portion 43 of the third component 40 contacts the end portion 51 of the fourth component 50. The inner diameter D41 of the third component 40 is smaller than the distance between the vertices D53, but since the chamfered portion 43 is formed on the third component 40, the end portion 51 of the fourth component 50 can be inserted into the inside of the end portion 41 of the third component 40.

[0056] If the end 51 of the fourth component 50 is inserted into the inside of the end 41 of the third component 40, the end 51 of the fourth component 50 will receive a reaction force from the chamfered portion 43 of the third component 40, such as... Figure 8 As shown, the end 51 of the fourth component 50 is elastically deformed by narrowing its diameter radially inward. The end 51 of the fourth component 50 is inserted until it reaches the range of its elastic radial inward deformation. Thus, the end 51 of the fourth component 50 is inserted into the inside of the end 41 of the third component 40, forming a component connection structure 60.

[0057] At the end 51 of the fourth component 50, a restoring force is generated radially outward through elastic deformation inward. This restoring force secures the third component 40 and the fourth component 50 together with high strength. Furthermore, if the third component 40 or the fourth component 50 is pulled out with a force exceeding the restoring force, the third component 40 and the fourth component 50 can be disassembled. After disassembly, the end 51 of the fourth component 50 returns to its original shape and can therefore be reused.

[0058] Thus, the bonding structure 60 of the components of the present invention can be bonded and fixed with high strength without the need for anti-detachment components or other parts, and can be disassembled and reused after bonding.

[0059] In embodiment 2, the cross-section of the third component is set as a hollow circular steel pipe, but the inner circumference shape of the cross-section can also be set as a polygonal shape such as a triangle or a quadrilateral shape instead of a circle.

[0060] In embodiment 2, the cross-section of the fourth component is a hollow hexagonal polygonal steel tube, but it can also be solid. The outer periphery of the fourth component's cross-section can be any shape as long as it differs from the inner periphery of the third component's cross-section. For example, if the inner periphery of the third component's cross-section is circular, the outer periphery of the fourth component's cross-section can also be a triangle, quadrilateral, or other polygonal shape. In the case of a polygon, since it connects to the third component at the vertices of the polygon, if the dimensional accuracy of the polygon's vertices is high, it can connect to the third component even if the dimensional accuracy of other parts is low.

[0061] Implementation Method 3

[0062] Next, use Figure 9 (a) and Figure 9 (b) The connection structure of the components according to Embodiment 3 will be described. The connection structure of the components according to Embodiment 3 is composed of a first component 10 and a second component 70. The structure of the first component 10 is the same as that of the first component 10 constituting the connection structure of the components according to Embodiment 1, so detailed description is omitted.

[0063] The overall shape of the second component 70 is the same as that of the second component 20, which constitutes the joining structure of the components involved in Embodiment 1. However, the second component 70 and the second component 20 are made of different materials. For example... Figure 9 As shown in (b), in the second component 70, the outer layer 71 constituting the radially outer side and the inner layer 72 constituting the radially inner side are made of different materials. Specifically, the outer layer 71 is formed of steel, and the inner layer 72 is formed of polyurethane resin. The outer layer 71 may also be made of other metal materials such as aluminum. Furthermore, the inner layer 72 may also be made of other resin materials such as silicone resin.

[0064] The second component 70 is formed, for example, by molding a square steel tube from steel and coating the inner circumferential wall of the square steel tube with polyurethane resin. Alternatively, in the end portion 21 of the second component 70, the outer layer 71 may be made of metal and the inner layer 72 may be made of resin, while in the central portion 22, both the outer layer 71 and the inner layer 72 may be made of metal.

[0065] The joining method of the component joining structure involved in Embodiment 3 is the same as the joining method of the component joining structure involved in Embodiment 1, therefore, detailed description is omitted. Figure 9 As shown in (c), by inserting the end 11 of the first component 10 into the inside of the end 21 of the second component 70, the end 21 of the second component 70 elastically deforms radially outward to form a component bonding structure 80.

[0066] The bonding structure of the components according to Embodiment 3 improves the tightness of the connection with the first component 10 by using a resin material in the inner layer 72 of the second component 70. The inner layer 72 of the second component 70 elastically deforms along the shape of the outer peripheral wall of the first component 10, thus achieving a high-strength bond. Furthermore, by filling the gap between the first component 10 and the second component 70 through the elastic deformation of the inner layer 72 of the second component 70 along the shape of the outer peripheral wall of the first component 10, the generation of abnormal noise can be suppressed. Moreover, since the outer layers 71 of the first component 10 and the second component 70 do not contact each other, the generation of electrolytic corrosion caused by the contact of metal materials can be suppressed.

[0067] Furthermore, the present invention is not limited to the above-described embodiments, and appropriate modifications can be made without departing from the spirit of the invention.

[0068] This application claims priority based on Japanese Application Special Hoc 2024-203790, filed on November 22, 2024, the entire contents of which are incorporated herein by reference.

[0069] Symbol Explanation

[0070] 10-First component, 11-End, 13-Chamfer, 20-Second component, 21-End, 30-Joint structure of components, 40-Third component, 41-End, 43-Chamfer, 50-Fourth component, 51-End, 60-Joint structure of components, 70-Second component, 71-Outer layer, 72-Inner layer, 80-Joint structure of components.

Claims

1. A component joining structure comprising a first component and a second component, wherein the second component is hollow and the inner periphery of its cross-section differs from the outer periphery of the cross-section of the first component, the component joining structure being characterized in that... The end of the first component is inserted into the inside of the end of the second component. The end of the second component undergoes elastic deformation radially outward.

2. The component assembly structure according to claim 1, characterized in that, When the first component and the second component before assembly are aligned on the same straight line, an overlap is formed between the ends of the first component and the second component in the axial direction.

3. The component assembly structure according to claim 2, characterized in that, A chamfer is formed on the outer periphery of the end of the first component. The overlapping portion is formed in the chamfered portion.

4. The component joining structure according to claim 1, characterized in that, The outer layer of the second component is formed of a metallic material, and the inner layer of the second component is formed of a resin material.

5. A component joining structure comprising a third component and a fourth component, wherein the third component is hollow, and the outer periphery of the cross-section of the fourth component differs from the inner periphery of the cross-section of the third component, the component joining structure being characterized in that... The end of the fourth component is inserted into the inside of the end of the third component. The end of the fourth component undergoes elastic deformation radially inward.

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