Rear axle support structure for motorcycles
Patent Information
- Authority / Receiving Office
- DE · DE
- Patent Type
- Patents
- Current Assignee / Owner
- HONDA MOTOR CO LTD
- Filing Date
- 2018-02-15
- Publication Date
- 2026-07-23
Abstract
Description
AREA
[0001] The present invention relates to a rear axle support structure for a motorcycle. BACKGROUND
[0002] As described as an example in PATENT LITERATURE 1, a rear swingarm 1, which is rotatably mounted on a motorcycle frame in order to be able to swing in a vertical direction, includes in a known rear axle support construction for the motorcycle a rectangular tube and end pieces 4 The end pieces 4 are formed at the rear ends of the rectangular tube and support a rear axle. CITATION LIST PATENT LITERATURE
[0003] PATENT LITERATURE 1: Japanese unexamined utility model Publication No. 63-48691 BRIEF SUMMARY TECHNICAL PROBLEM
[0004] In the conventional rear axle carrier design for motorcycles described above, since the end pieces ( 4Since the rear ends of the swingarm are solid (not hollow), they are heavy. An objective of the present invention is to provide a rear axle support structure for a motorcycle that makes it possible to lighten the rear ends of the swingarm. PROBLEM SOLVING
[0005] To solve this problem, a rear axle support structure for a motorcycle according to the present invention includes a rear swingarm configured to be rotatably supported by a motorcycle frame, allowing it to swing in the vertical direction. The rear swingarm comprises a rectangular tube and end pieces formed at the rear ends of the rectangular tube and configured to support a rear axle. Each end piece comprises an outer plate arranged externally in a frame width direction and including a hole extending through the outer plate in the frame width direction; an inner plate arranged internally in the frame width direction and including a hole extending through the inner plate in the frame width direction; and an interior formed by joining a circumferential edge of the outer plate and a circumferential edge of the inner plate, creating a space.The outer plate further includes projecting sections formed at an upper and a lower edge of the outer plate along a front-to-back direction and projecting outwards in the frame width direction; and a concave section formed between the projecting sections and concave inwards in the frame width direction with respect to the projecting sections, in which the hole is formed.
[0006] Since each of the end pieces contains the interior space formed by joining the circumferential edge of the outer plate and the circumferential edge of the inner plate, the end pieces can be made lighter. This allows the rear ends of the swingarm to be made lighter. As described above, the outer plate contains the protruding sections and the concave section; the protruding sections are formed on the upper and lower edges of the outer plate along the front-to-rear direction and project outwards in the frame width direction; the concave section is formed between the protruding sections and is concave inwards in the frame width direction with respect to the protruding sections; and the hole is formed in the concave section. Thus, an adjustment element can be arranged in the concave section.
[0007] In the rear axle carrier design for motorcycles, a reinforcing plate is formed between the outer and inner plates, positioned along the outer circumference of the hole. This reinforcement plate increases the stiffness of both the outer and inner plates around the hole.
[0008] In the rear axle carrier design for a motorcycle, a front protruding section is formed in front of the concave section. This section projects outwards in the direction of the frame width and has a groove. A nut, used for an adjusting screw, is attached to this groove. In this configuration, the nut used for the adjusting screw can be easily fastened.
[0009] In the rear axle carrier design for a motorcycle, the outer diameter of the reinforcing plate is larger than the outer diameter of the base plate of a bolt head and the base plate of a nut. The bolt is the rear axle itself, which is inserted into the hole and screwed into the nut. This configuration can increase the stiffness of the receiving section of the base plate pressed by the bolt and the stiffness of the receiving section of the base plate through the nut. List of characters Fig. Figure 1 is a perspective view showing a rear axle support structure for the motorcycle of an embodiment of the present invention. Fig. 2A is an enlarged perspective view showing the rear end of a rear swingarm. Fig. 2B is an exploded view illustrating the rear end of the rear swingarm. Fig. 3A is an enlarged side view showing the rear end of the rear swingarm. Fig. 3B is a cross-sectional view that follows a line b-b from Fig. 3A is recorded and in which one section is not shown. DETAILED DESCRIPTION
[0010] The following describes a rear axle support structure for a motorcycle of an embodiment of the present invention with reference to the accompanying drawings. In the following description, a front-to-rear direction, a right-to-left direction, and a vertical direction with respect to a rider of the motorcycle are defined. In the drawings, the directions are indicated by symbols; in particular, a front direction of the motorcycle is indicated by a symbol. Fr A rear direction is indicated by a symbol. Rr , a left direction indicated by a symbol L , a right direction indicated by a symbol R, an upper direction by a symbol U and a downward direction indicated by a symbol D In every drawing, an identical or equivalent component is assigned an identical symbol.
[0011] As in the Fig. 1 to Fig. Figure 3B shows a rear axle support structure for the motorcycle of the present embodiment, which includes a rear swingarm. 10 , which is rotatably mounted on a frame (not shown) of the motorcycle in order to be able to swing in a vertical direction, a rectangular tube 11 and end pieces 20 The end pieces 20 are at the rear ends of the rectangular tube 11 trained and carry a rear axle 30 (see Fig. 3B).
[0012] As in the Fig. 2A to Fig. As shown in 3B, each of the end pieces includes 20 an outer plate 21 and an inner plate 22The outer plate 21 is on the outside in a frame width direction (indicated by the arrows) L and R ) arranged and includes a hole 21h , which is through the outer plate 21 runs in the direction of the frame width. The inner plate 22 is arranged inside in the direction of the frame width and includes a hole 22h , which is through the inner plate 22 running in the direction of the frame width. Each of the end pieces 20 It also includes an interior 23 , which is formed by connecting a circumferential edge 21e the outer plate 21 and a circumferential edge 22e the inner plate 22 is formed, and in which a space is formed.
[0013] The outer plate 21 also includes the preceding sections. 21b and a concave section 21c The preceding sections 21bare at a top edge and a bottom edge of the outer plate 21 formed along the front and rear axles, they project outwards in the direction of the frame width. The concave section 21c is between the preceding sections 21b formed and inwards in the frame width direction with respect to the preceding sections 21b concave. In the concave section 21c will the hole 21h educated.
[0014] Since each of the end pieces 20 the interior contains, which is formed by connecting the circumferential edge 21e the outer plate 21 and the circumferential edge 22e the inner plate is formed, and in which a space is formed, the end pieces can 20 This makes it lighter. This allows the rear ends of the rear swingarm to be... 10 made easier.
[0015] As described above, the outer plate includes 21the preceding sections 21b and the concave section 21c ; the preceding sections 21b are at the top and bottom edges of the outer plate 21 formed along the front-to-back direction and project outwards in the direction of the frame width; the concave section 21c is between the preceding sections 21b and concave inwards in the direction of the frame width with respect to the preceding sections 21b formed; and in the concave section 21c is the through hole 21h trained. Thus, in the concave section 21c an adjusting element (e.g. a chain tensioner) 42 , depicted in the Fig. 3A and Fig. 3B) will be ordered.
[0016] Furthermore, there is between the outer plate 21 and the inner plate 22 a reinforcement plate 25 formed along an outer circumference of the hole 21hand an outer circumference of the hole 22h is arranged. With the reinforcement plate arranged in this way. 25 can the stiffness of a section of the outer plate 21 around the hole 21h and the stiffness of a section of the inner plate 22 around the hole 22h can be increased. The increased stiffness allows the outer plate to be... 21 and the inner plate 22 to make the rear ends of the rear swingarm thinner 10 can provide further relief.
[0017] The outer plate 21 also includes a front projecting section 21f , which is in front of the concave section 21c is formed, protrudes outwards in the direction of the body width and has a groove 21d exhibits. Additionally, a mother 26 for an adjustment screw 41 (see Fig. 3A and Fig. 3B) into the groove 21d inserted and secured.
[0018] In this configuration, the nut used for the adjusting screw 26 They can be easily attached.
[0019] As in Fig. 3A shows an outer diameter D2 the reinforcement plate 25 larger than an outer diameter D1 a base plate 32 a head 31 a screw and a base plate 34 a mother 33 Here, the screw is the rear axle. 30 , which go into the holes 21h and 22h inserted and into the mother 33 is screwed in. This configuration can increase the stiffness of a mounting section of the base plate. 32 , which is through the screw 30 is pressed, and the stiffness of a receiving section of the base plate 34 , which is through the mother 33 Pressing increases the pressure.
[0020] The in Fig. 1 Rear wheel swingarm shown10 is rotatably mounted in the vertical direction, wherein a tube 12 at the front of the rear swingarm 10 It is supported by a frame (not shown) of the motorcycle via a swivel bearing. The rectangular tube 11 the rear swingarm 10 It can be made of an iron alloy or an aluminum alloy.
[0021] The components of the end pieces 20 They can also be made from an iron alloy or an aluminum alloy. The outer plate 21 and the inner plate 22 can be formed by pressing a thin sheet. The circumferential edge 21e the outer plate 21 and the circumferential edge 22e the inner plate 22 can be joined together by welding.
[0022] The reinforcement plate 25 can be done before welding the outer plate 21 and the inner plate 22on an inner surface of the inner plate 22 to be welded on. The one for the adjusting screw 41 used mother 26 can go into the groove 21d of the front preceding section 21f the outer plate 21f inserted and welded to the groove 21d to be attached.
[0023] The end pieces 20 are attached to the rear sections of the rectangular tube 11 attached to the rear swingarm by the front sections of the end pieces 20 with the rear sections of the rectangular tube 11 be welded together. In the Fig. 1 to Fig. 3B Weld sections are identified by reference symbols 13 marked.
[0024] Here, the adjustment screw can be adjusted. 41 used mother 26 welded simultaneously with the groove when the end pieces 20 with the rear sections of the rectangular tube11 are welded together. A welded section 26c the mother 26 for welding onto the rectangular pipe 11 It's just being done.
[0025] As in the Fig. 3A and Fig. The adjustment screw is shown in 3B. 41 on the mother 26 attached. The rear axle 30 is installed in the chain tensioner 42 It is used and can be moved forwards and backwards along the motorcycle. By adjusting the position of the chain tensioner. 42 with the help of the adjusting screw 41 This allows the position of the rear axle to be determined. 30 (i.e., the tension of the chain) can be adjusted.
[0026] Although the embodiment of the present invention has been described, the present invention is not limited to the embodiment described above and can be modified accordingly within the scope of the present invention. For example, although the circumferential edge 22ethe inner plate 22e perpendicular to the inner plate 22 Once formed, the inner plate 22 be shaped like a flat plate, with the circumferential edge 22e flush with the inner plate 22 is formed. Even if the inner plate 22 Shaped like a flat plate, the end pieces can be joined by connecting the circumferential edge. 21e the outer plate 21 and the circumferential edge 22e the inner plate 22 to be made hollower. Reference symbol list 10: Rear swingarm 11: rectangular tube 20: End piece 21: outer plate 21b: preceding section 21c: concave section 21d: Nut 21f: front preceding section 21e: Perimeter edge 21h: Hole 22: inner plate 22e: Perimeter edge 10 PM: Hole 23: Interior 25: Reinforcement plate 26: Nut for the adjusting screw 30: Rear axle 32: Base plate of the screw 34: Base plate of the mother
Claims
[1] Rear axle support structure for a motorcycle, wherein the rear axle support structure comprises a rear swingarm (10) configured to be rotatably supported by a motorcycle frame in order to swing in a vertical direction, the rear swingarm (10) includes: a rectangular tube (11); and End pieces (20) formed at the rear ends of the rectangular tube (11) and designed to support a rear axle (30), the end pieces (20) each comprising: an outer plate (21) which is arranged outside in a frame width direction and has a hole (21h) which extends through the outer plate (21) in the frame width direction, an inner plate (22) which is arranged inside in the frame width direction and has a hole (22h) which extends through the inner plate (22) in the frame width direction, and an interior space (23) formed by connecting a circumferential edge (21e) of the outer plate (21) and a circumferential edge (22e) of the inner plate (22), and in which the outer plate (21) further comprises: protruding sections (21b) which are formed on an upper edge and a lower edge of the outer plate (21) along a front-back direction and project outwards in the frame width direction, and a concave section (21c) which is concave between the preceding sections (21b) and inwards in the body width direction with respect to the preceding sections (21b) and in which the hole (21h) is formed. [2] Rear axle support structure according to claim 1, wherein a reinforcing plate (25) is formed between the outer plate (21) and the inner plate (22) and is arranged along an outer circumference of the bore (21h). [3] Rear axle support structure according to claim 1, wherein a front projecting section (21f) is formed in front of the concave section (21c), which projects outwards in the frame width direction and has a groove (21d), wherein a nut (26) used for an adjusting screw is attached to the groove (21d). [4] Rear axle carrier construction according to bracket 2, wherein an outer diameter (D2) of the reinforcement plate (25) is larger than an outer diameter (D1) of a base plate (32) of a head (31) of a screw and a base plate (34) of a nut (33), and wherein the screw is the rear axle (30) which is inserted into the hole (21h) and screwed into the nut (33).