Rotating member and method for forming the same

Abstract

The present invention provides a rotating component and a method for forming the same, which can form a convex portion embedded in a relative surface through a simple structure, and can suppress the reduction of the anti-slip effect due to the direction, and can fully prevent slipping in the radial direction as well as the torque direction. At least one end surface (110) of the axial end surfaces (110) of the convex portion (101) has an anti-slip surface (111), and the anti-slip surface (111) has a plurality of indented concave portions (120) with surrounding convex portions (121), and at least a part of the plurality of indented concave portions (120) constitutes a plurality of indented column portions (112) arranged in a column.

Description

Technical Field

[0001] The present invention relates to a rotating component having a protrusion and having an anti-slip surface on at least one of the two axial end surfaces of the protrusion, and a method for forming the same. Background Art

[0002] Conventionally, there is known a rotating member having a boss portion and capable of transmitting torque from at least one of both axial end faces of the boss portion, wherein the end face is provided with an anti-slip surface subjected to anti-slip processing.

[0003] For example, the following rotating components are well known. Figure 1 a. Figure 1 When the rotating component shown in b, i.e., the sprocket 500 having a protrusion 501 and a plurality of teeth 502 formed along the outer circumference, is fixed to a crankshaft (not shown), the protrusion 501 is inserted into the end portion of the crankshaft and clamped in the axial direction with bolts or the like, thereby transmitting torque between the end face of the crankshaft and the end face 503 of the protrusion 501.

[0004] Among such rotating members, there is known a rotating member in which an anti-slip surface 511 is formed on an end surface 503 that abuts against an opposite end surface in order to prevent slippage.

[0005] As a general method for forming an anti-slip surface, there is known a method of roughening the surface by forming concavo-convex portions on the surface by shot peening or the like to increase the friction coefficient.

[0006] In addition, a rotating member is known in which a concave-convex portion is formed on the end surface of a protrusion of a sprocket by laser processing, and the protrusion is actively fitted into the opposing surface by a clamping force, thereby more firmly preventing slipping (see Patent Document 1, etc.).

[0007] Patent Document 1: U.S. Patent No. 7472467 Summary of the invention

[0008] When the surface is roughened by forming irregularities on the surface by shot peening or the like, the friction coefficient can be increased, but it is not possible to provide convex portions that fit into the opposing surface.

[0009] In the technology described in Patent Document 1, although a convex portion such as an embedded opposite surface can be provided by laser processing, since the molten material bulges around the groove to form the convex portion, the apex of the convex portion presents a smooth curve, and various conditions such as thermal hardening due to the laser and the material of the opposite surface need to be resolved, and the output also needs to be adjusted with high precision.

[0010] In addition, the laser processing machine itself is relatively expensive, which causes a problem of increased manufacturing cost.

[0011] Furthermore, since the projections are projections along the lines on both sides of the groove when the groove is machined by laser, there is a problem that the anti-slip effect in the direction parallel to the groove is small.

[0012] As described in Patent Document 1 Figure 4 , Figure 6 In the upper section, although it is recorded that the rotating component is provided with a convex portion at the end of the groove by making the groove discontinuous, since the width of the groove processed by laser is extremely small, the anti-slip effect in the direction parallel to the groove is extremely small.

[0013] That is, when radial grooves are processed to prevent slipping against rotation torque, the radial direction is not sufficiently prevented from slipping, and there is a problem that the shaking of the rotating member due to vibration or shaft runout cannot be prevented sufficiently.

[0014] The present invention is made to solve these problems. The technical problem to be solved is to provide a rotating component and a method for forming the same, which can form a convex portion embedded in the relative surface through a simple structure, and at the same time can suppress the reduction of the anti-slip effect due to the direction, and can fully prevent slip in the radial direction together with the torque direction.

[0015] The rotating component involved in the present invention is as follows, comprising a protrusion, and an anti-slip surface on at least one of the two axial end faces of the protrusion, wherein the anti-slip surface has a plurality of indented recesses having surrounding convex portions, and at least a portion of the plurality of indented recesses constitutes a plurality of indented columns arranged in columns, thereby solving the above-mentioned problem.

[0016] The anti-slip forming method of the rotating component involved in the present invention is as follows, which is a method for forming a rotating component having a raised portion and an anti-slip surface on at least one of the two axial end faces of the raised portion, wherein the anti-slip surface is formed by punching a plurality of indented recesses having surrounding convex portions, and at least a portion of the plurality of punchings forms a plurality of indented columns punched in a column, thereby solving the above-mentioned problem.

[0017] According to the anti-slip forming method of the rotating component involved in Technical Solution 1 and the rotating component involved in Technical Solution 7, a plurality of indented recesses with surrounding convex portions are formed by engraving on the anti-slip surface. Since the surrounding convex portions are formed by engraving, they have a shape with a sharp upright tip and can be easily embedded in the opposite surface.

[0018] In addition, since the peripheral convex portion is continuously formed around the engraved portion, it has an anti-slip effect in all directions when embedded in the opposing surface, suppressing the reduction of the anti-slip effect due to direction, and can fully prevent slipping in the radial direction as well as the torque direction.

[0019] In addition, since at least a portion of the multiple engravings form multiple columns of concave grooves engraved in columns, the configuration of the surrounding convex portions is given regularity, making engraving easier. At the same time, the density of the surrounding convex portions along the direction is changed, which can actively provide the strength of the anti-slip effect along the direction.

[0020] Furthermore, since a general-purpose device can be used as the device for performing the engraving, and the device can be easily controlled, the rotating member can be manufactured with a simple structure and at a low cost.

[0021] According to the construction described in Technical Solution 2 and Technical Solution 8, since the column-shaped engraving is performed in a manner of p / D≤1 when the diameter of the ridge line of the surrounding convex portion is D and the spacing between adjacent concave-shaped concave portions is p, the density of the surrounding convex portions in the direction in which the concave column portions extend increases, and the anti-slip effect in the vertical direction is extremely high.

[0022] Furthermore, since the carving is performed sequentially, a certain degree of convexity can remain even in the overlapped portion of the convexity around the adjacent dimple-shaped concave portions, and a decrease in the anti-slip effect in the direction in which the dimple row extends can be suppressed.

[0023] Furthermore, since the engraving is performed sequentially, convex portions that are higher than the original surrounding convex portions can be formed near both ends of the overlapped portions of the surrounding convex portions of adjacent dent-shaped concave portions, thereby further improving the anti-slip effect.

[0024] According to the configurations described in the third and ninth aspects of the present invention, it is possible to achieve an extremely high anti-slip effect on the rotational torque.

[0025] According to the configurations described in claim 4 and claim 10 of the present invention, the directions of the deformed convex portions as a whole can be made random, and the anti-slip effect in the direction in which the dimple row extends can be made uniform.

[0026] Furthermore, when the engraving is performed sequentially, the engraving can be performed continuously and alternately from the inner peripheral side to the outer peripheral side and from the outer peripheral side to the inner peripheral side of the rotating member, thereby further facilitating the manufacturing.

[0027] According to the configurations described in the fifth and eleventh aspects of the present invention, it is possible to achieve an extremely high anti-slip effect in the radial direction.

[0028] According to the configuration described in claim 6 and claim 12 of the present invention, the balance between the anti-slip effect on the rotational torque and the anti-slip effect on the radial direction can be arbitrarily designed. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 a is a reference front view of a rotating component (sprocket) having an anti-slip surface.

[0030] Figure 1 b is a reference side view of a rotating member (sprocket) having an anti-slip surface.

[0031] Figure 2 It is a front view (part) of the rotating member according to the first embodiment of the present invention.

[0032] Figure 3 It is a simplified schematic diagram of the indentation column.

[0033] Figure 4 It is a front view (part) of a rotating member according to a modification of the first embodiment.

[0034] Figure 5 It is a front view (part) of a rotating member according to another modified example of the first embodiment.

[0035] Figure 6 It is a front view (partial) of a rotating member according to a second embodiment of the present invention.

[0036] Figure 7 It is a front view (part) of a rotating member according to a third embodiment of the present invention.

[0037] Figure 8 It is a front view (partial) of a rotating member according to a fourth embodiment of the present invention.

[0038] Explanation of symbols

[0039] 100, 500 - sprocket (rotating component); 101, 501 - raised portion; 102, 502 - tooth; 110, 503 - end face; 111, 511 - anti-slip surface; 112 - indentation column; 120 - indentation-shaped concave portion; 121 - surrounding convex portion; 122 - ridge line; 123 - deformed convex portion; 124 - convex enlarged portion. DETAILED DESCRIPTION

[0040] The rotating component of the present invention has a protruding portion, and an anti-slip surface is provided on at least one of the two axial end faces of the protruding portion, the anti-slip surface has a plurality of indented recesses with surrounding convex portions, and at least a portion of the plurality of indented recesses constitute a plurality of indented columns arranged in a row. In addition, the anti-slip forming method of the rotating component involved in the present invention is a forming method of a rotating component having a protruding portion and an anti-slip surface on at least one of the two axial end faces of the protruding portion, the anti-slip surface is formed by engraving a plurality of indented recesses with surrounding convex portions, and at least a portion of the plurality of engravings forms a plurality of indented columns engraved in a row. As long as a convex portion embedded in the opposite surface can be formed by a simple structure, and a reduction in the anti-slip effect due to direction can be suppressed, and a rotating component and a forming method thereof can be fully anti-slip in the radial direction together with the torque direction, then its specific structure can be arbitrary.

[0041] Example 1

[0042] like Figure 2 As shown, the rotating component involved in the first embodiment of the present invention, namely the sprocket 100, is formed to have a plurality of teeth 102 formed along the outer circumference. When fixed to a crankshaft (not shown), a boss 101 is inserted into the end of the crankshaft and clamped in the axial direction by bolts or the like, so that an anti-slip surface 111 formed on the end face 103 of the boss 101 abuts against the crankshaft to transmit torque.

[0043] The anti-slip surface 111 has a groove row portion 112 in which groove-shaped recessed portions 120 are continuously engraved. The groove-shaped recessed portions 120 have surrounding convex portions 121 . The plurality of groove rows 112 are radially arranged.

[0044] When the diameter of the ridge line 122 of the surrounding convex portion 121 is D and the spacing between adjacent indent-shaped recesses 120 is p, a plurality of indent-shaped recesses 120 in the indent column 112 are engraved sequentially in a manner such that p / D≤1, i.e., the surrounding convex portion 121 of the adjacent indent-shaped recess 120 to be engraved next is overlapped on the ridge line 122 of the surrounding convex portion 121 of the previously engraved indent-shaped recess 120.

[0045] according to Figure 3 The following describes the change in shape when engraving is performed sequentially and overlappingly.

[0046] First, when the uppermost notch-shaped recessed portion 120a is engraved, a peripheral convex portion 121a having a ridgeline 122a is formed.

[0047] Next, when the middle section of the notch-shaped recess 120b is engraved in such a manner as to overlap with the notch-shaped recess 120a, the overlapping portion below the surrounding convex portion 121a of the notch-shaped recess 120a is deformed into a circular shape continuous with the surrounding convex portion 121b of the notch-shaped recess 120b, thereby forming a deformed convex portion 123a.

[0048] In addition, near the two overlapping end portions, a convex enlarged portion 124a whose apex protrudes more than the original peripheral convex portion 121a is formed.

[0049] Even when the notch-shaped recessed portion 120c is punched following the punching of the notch-shaped recessed portion 120b, the deformed convex portion 123b and the convex enlarged portion 124b are similarly formed, and this process occurs continuously and repeatedly.

[0050] In this embodiment, a plurality of radial groove rows 112 are arranged along Figure 2 The path indicated by the arrows is continuously engraved from the inner peripheral side to the outer peripheral side and from the outer peripheral side to the inner peripheral side of the sprocket 100 in an alternating manner.

[0051] Furthermore, the plurality of radial indentation columns 112 may be Figure 4 As shown in FIG. 1 , all sprockets 100 are engraved from the inner circumference to the outer circumference (the deformed convex portion is located on the inner circumference), and can also be engraved as shown in FIG. Figure 5 As shown, it is engraved from the entire outer circumference to the inner circumference (the deformed convex portion is located on the outer circumference).

[0052] Furthermore, the dimple rows 112 punched from the inner circumference to the outer circumference and from the outer circumference to the inner circumference may be mixed irregularly.

[0053] Example 2

[0054] like Figure 6 As shown, the rotating member, that is, the sprocket according to the second embodiment of the present invention is as follows: the plurality of radially arranged notch rows 112 have notch-shaped recesses that do not overlap but exist independently, and the other structures are the same as those of the first embodiment.

[0055] Example 3

[0056] like Figure 7 As shown, the sprocket as a rotating member according to the third embodiment of the present invention is configured such that the notch-shaped recessed portions constituting the notch row portion 112 are arranged to extend in the circumferential direction, and the other configurations are the same as those of the first embodiment described above.

[0057] Although only one dimple row 112 is provided in the figure, a plurality of dimple rows 112 arranged in the circumferential direction may be provided.

[0058] Example 4

[0059] like Figure 8 As shown, the sprocket as a rotating member according to the fourth embodiment of the present invention is configured such that the notch-shaped recessed portions constituting the plurality of notch rows 112 are arranged to extend in a spiral shape, and the other configurations are the same as those of the first embodiment.

[0060] Although the embodiments described above assume the same arrangement over the entire circumference, the density and direction of the engraving may be different for each portion, and the embodiments may change continuously and be mixed. The rows of indentations may also be arranged in a cross manner.

[0061] Furthermore, although the example in which the peripheral convex portion is formed in a circular shape is described, the concave portion may be formed in an elliptical shape or a polygonal shape as long as the same effect is achieved.

[0062] The device for engraving may be any device as long as it can engrave continuously on the end surface.

[0063] Furthermore, although a sprocket is exemplified as the rotating member, any rotating member may be used as long as it receives torque from the end surface, and the rotating member can be used in various industrial fields.

Claims

1. A rotating member having a protrusion, wherein at least one of the two axial end faces of the protrusion has an anti-slip surface, wherein: The anti-slip surface has a plurality of indented recesses with surrounding convex portions formed by engraving, At least a portion of the plurality of dimple-shaped recesses constitutes a plurality of dimple columns arranged in columns, Part or all of the plurality of dimple arrays are formed to extend radially on the anti-slip surface, Each of the notch-shaped recessed portions constituting the notch row portion has a deformed convex portion formed by the engraving of the adjacent notch-shaped recessed portion in a part of the surrounding convex portion. Among the multiple indentation columns, there are indentation columns in which the deformed convex portions of the indent-shaped concave portions are arranged toward the outer peripheral side of the convex portion and indentation columns in which the deformed convex portions of the indent-shaped concave portions are arranged toward the inner peripheral side of the convex portion.

2. The rotating member according to claim 1, characterized in that: The dimple array is as follows: when the diameter of the ridgeline of the surrounding convex portion is D and the pitch between adjacent dimple-shaped concave portions is p, The plurality of notch-shaped recessed portions are arranged so that p / D≦1.

3. A method for forming an anti-slip component of a rotating member, which is a method for forming a rotating member having a protrusion and having an anti-slip surface on at least one of the two axial end surfaces of the protrusion, wherein: The anti-slip surface is formed by engraving a plurality of concave portions with surrounding convex portions. At least a portion of the plurality of indentations forms a plurality of indentation columns in a column shape. Part or all of the columnar engravings are engraved in a radially extending manner on the anti-slip surface. In each of the notch-shaped recessed portions constituting the notch row portion, a deformed convex portion is formed in which a part of the surrounding convex portion is deformed due to the engraving of the adjacent notch-shaped recessed portion. The plurality of dimple rows are formed by a mixture of a dimple row in which the deformed convex portions of the dimple-shaped recesses are arranged toward the outer peripheral side of the protrusion and a dimple row in which the deformed convex portions of the dimple-shaped recesses are arranged toward the inner peripheral side of the protrusion.

4. The anti-slip forming method of a rotating member according to claim 3, characterized in that: The row-shaped engraving is when the diameter of the ridgeline of the surrounding convex portion is D and the spacing between adjacent concave-shaped concave portions is p. The marking is performed in such a way that p / D≤1.

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