Motorcycle handlebar expansion screw and plug

Abstract

The utility model discloses a motorcycle handlebar expansion screw and plug, which comprises a plug, an outer wedge, an inner wedge, a square nut and a bolt and is mounted on a handlebar. The outer wedge and the inner wedge are vertically and symmetrically attached to the inner hole wall of the handlebar in an inclined mode, the contact area is large, and the expansion screw is fixed to the handlebar more firmly through extrusion of the wedge-shaped structure formed by the diagonal planes. The bottom of the inner wedge is of various structures such as a single wedge table or a flat opposite wedge table or a vertical opposite wedge table, the manufacturing process can be simplified, use of various fit clearances can be met, and the bolt can be centered as much as possible. A bolt groove is formed in the plug, a limiting table is arranged on the bottom face of the plug, the plug can be better installed on a handlebar through an expansion screw, the plug can be matched with handlebars of more sizes by additionally arranging a limiting ring, and the fixing bolt and the handlebar can be better protected when a bicycle falls.

Description

Technical Field

[0001] The utility model relates to the technical field of motorcycle handlebar protection, in particular to an expansion screw and a plug for a motorcycle handlebar. Background Art

[0002] As a convenient means of transportation and entertainment toy, motorcycles are becoming more and more popular. However, motorcycles are two-wheeled structures, and there is a risk of falling during riding, so handlebar plugs need to be installed to protect the handlebars. Some motorcycle enthusiasts also like to modify their motorcycles according to their own hobbies, especially modifying the handlebar plugs to make the motorcycle beautiful. The handlebar plugs can also effectively absorb the vibration transmitted from the motorcycle to the handlebars. The handlebar plugs, bow guards or handlebar mirrors need to be fixed to the handlebars with special expansion screws. Common expansion screws sometimes become loose.

[0003] Document CN116001956A describes an energy absorbing guard bow and an installation method, which includes a structure and a method for installing the energy absorbing guard bow by means of a recessed slot nut and an inner wedge tube and an outer wedge tube.

[0004] Document CN112628261B describes an expansion screw that can accommodate an expansion tube compression sleeve in a compression sleeve accommodating groove without affecting the locking and fixing of the nut and the normal use of the expansion screw; more importantly, a reserved gap is set between the push rod and the expansion tube and the gasket. In this way, when a gap appears in the wall where the expansion screw is located and the expansion screw is loosened, the push rod can be locked to eliminate the gap in the wall where the expansion screw is located, and then the expansion screw can be fixed to the wall again by tightening the nut.

[0005] The disadvantages of the expansion screws known in the prior art are that the expansion screw concave nut in an energy absorbing guard and installation method is not a standard part and needs to be specially made, which increases the cost of use. When the difference between the outer diameter of the expansion screw and the inner diameter of the handlebar is large, the bolt of the expansion screw will seriously deviate from the center of the handlebar hole. Another expansion screw in document CN112628261B is still locally stressed at the innermost part of the wall, and the stress area is very small. If it is subjected to impact and rotational force, it is still easy to loosen, and it cannot be used in reverse. Utility Model Content

[0006] The utility model aims to provide a motorcycle handlebar expansion screw and a plug to solve the problems raised in the above-mentioned background technology.

[0007] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0008] A motorcycle handlebar expansion screw and plug, comprising a plug, an outer wedge, an inner wedge, a square nut, and a bolt, which are installed on the handlebar;

[0009] The outer wedge and the inner wedge are in a cylindrical state as a whole, and both have a beveled surface with the same bevel angle;

[0010] The square nut is close to the inner wedge, and the chamfered surface of the outer wedge is close to the chamfered surface of the inner wedge and is installed by bolt connection;

[0011] The plug is directly mounted on the handlebar, or is mounted by adding a limiting ring.

[0012] As a further solution of the utility model: the plug is a cylindrical body or a truncated cone body as a whole, with a round hole in the center, and the round hole matches the bolt;

[0013] The plug is provided with a limit platform on the bottom surface of the bolt groove;

[0014] The outer diameter of the limit platform matches the inner hole of the handlebar, and can be slightly shaken after installation, or when the inner hole and the outer diameter differ greatly, a limit ring is installed on the limit platform, and the outer diameter of the limit ring is slightly smaller than the inner diameter of the handlebar, which is a clearance fit, and the inner diameter of the limit ring is slightly larger than the outer diameter of the limit platform, which is also a clearance fit;

[0015] The depth and radius of the bolt groove match the size of the bolt head, so that the bolt head can be hidden in the plug;

[0016] The top and bottom surfaces of the plug also have chamfers and rounded transitions.

[0017] As a further solution of the utility model: the outer wedge and the inner wedge have the same overall outer shape radius, and have a circular hole with the same radius in the center, and both have a chamfered surface that is chamfered from the middle and lower part to the top, and the angles of the chamfered surfaces are consistent;

[0018] The diameters of the central circular holes of the outer wedge and the inner wedge are larger than the diameter of the bolt, and the diameter difference is set to D1;

[0019] The diameters of the outer wedge and the inner wedge are smaller than the inner diameter of the handlebar hole, and the diameter difference is set to D2;

[0020] D1>D2.

[0021] As a further solution of the utility model: the surface where the inner wedge cylinder is located is set as a bottom surface, and there is also a chamfered surface, the cylindrical surface where the top of the chamfered surface intersects is set as a high vertical surface, and the opposite is a low vertical surface, and the height of the low vertical surface is close to or greater than the height of the square nut;

[0022] The bottom surface is provided with a single wedge platform, a flat wedge platform, or a vertical wedge platform;

[0023] The single wedge platform is formed by cutting off more than half of the bottom surface of the inner wedge cylinder and leaving one side of the high vertical surface uncut, thereby forming a boss on one side. The height of the single wedge platform matches the height of the square nut, which can clamp the square nut and prevent it from turning, and can make the square nut close to the center of the handlebar;

[0024] The flat wedge is cut off in the middle of the bottom surface of the inner wedge, the cutting angle is consistent with that of the single wedge, the cutting width is wider than the square nut, and it is ensured that the square nut cannot rotate in the cutting groove, and the square nut can be slightly moved closer to the center of the handlebar;

[0025] The vertical wedge platform is a platform with more than half of the middle part of the bottom surface of the inner wedge cut off, and the cutting angle is 90 degrees with the angle of the single wedge platform. The cutting width is slightly wider than the square nut, and the square nut cannot be rotated in the cutting groove, and the square nut can be moved closer to the center of the handlebar without restriction.

[0026] The heights of the single wedge platform, the flat wedge platform, or the vertical wedge platform are substantially the same;

[0027] The diameter of the circumscribed circle of the square nut is larger than the diameter of the inner wedge and smaller than the diameter of the inner hole of the handlebar.

[0028] As a further solution of the utility model: the four sides of the square nut can be unequal, and when used with a wedge inside a vertical wedge platform, the square nut can be replaced by a standard hexagonal nut.

[0029] As a further solution of the utility model: when the difference between D1 and D2 is relatively large, the chamfered surfaces of the outer wedge and the inner wedge need to remove the sharp corners to prevent the sharp corners from interfering with the plug.

[0030] As a further solution of the utility model: the outer wedge can be replaced by an inner wedge.

[0031] As a further solution of the utility model: the inner wedge and the square nut can be replaced by a structure whose appearance is consistent with the outer wedge and whose bottom cylinder has threads matching the bolts.

[0032] As a further solution of the utility model: the bolt can also be placed in reverse for use, and the inner wedge can be replaced by another outer wedge.

[0033] Compared with the prior art, the beneficial effects of the utility model are:

[0034] A motorcycle handlebar expansion screw, wherein an outer wedge and an inner wedge are symmetrically fitted on the inner hole wall of the handlebar in an oblique manner, have a large contact area, and are squeezed by a wedge-shaped structure formed by an oblique cut surface, so that the expansion screw is more tightly fixed on the handlebar; wherein the bottom of the inner wedge has a variety of structures such as a single wedge platform, a flat wedge platform, or a vertical wedge platform, which can simplify the manufacturing process, meet the use of a variety of matching clearances, and can make the bolt centered as much as possible; a bolt groove is provided on the plug, and a limit platform is provided on the bottom surface, so that the expansion screw can be better installed on the handlebar, and more handlebar sizes can be matched by adding a limit ring, and the fixing bolt and the handlebar can be better protected when the motorcycle falls. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 This is a schematic diagram of the explosion structure of the single wedge expansion screw and plug on the motorcycle handlebar.

[0036] Figure 2 This is a partially enlarged schematic diagram of the single wedge expansion screw and plug on a motorcycle handlebar.

[0037] Figure 3 This is an enlarged view of the wedge inside the single wedge table.

[0038] Figure 4 This is a schematic diagram of the explosion structure of the motorcycle handlebar wedge expansion screws and plugs.

[0039] Figure 5 Schematic diagram of the explosion structure for installing the expansion screws for the vertical wedge platform of the motorcycle handlebar.

[0040] Figure 6 This is the installation effect diagram of the hexagonal nut expansion screw.

[0041] Figure 7 This is a half-section view of the plug.

[0042] Figure 8 This is a schematic diagram of the installation of the matching limit ring plug.

[0043] Fig. 9 Installation effect diagram of de-pointing the outer and inner wedges.

[0044] Among them: plug 1, bolt groove 11, limit platform 12, outer wedge 2, inner wedge 3, single wedge platform 31, flat wedge platform 32, vertical wedge platform 33, high vertical surface 36, low vertical surface 37, chamfered surface 38, square nut 4, hexagonal nut 42, bolt 5, handlebar 6, limit ring 7. DETAILED DESCRIPTION

[0045] The specific implementation of the present utility model is described in detail below in conjunction with specific embodiments.

[0046] Embodiment 1, as Figure 1-2As shown, a motorcycle handlebar expansion screw and plug installation structure diagram is provided for an embodiment of the utility model. In the figure, an outer wedge 2, an inner wedge 3, a square nut 4 and a bolt 5 are connected in sequence to form an expansion screw. The plug is passed through the bolt 5 and installed on the handlebar 6.

[0047] like Figure 1-2 As shown, the outer wedge 2 and the inner wedge 3 are cylindrical as a whole, and both have a beveled surface 38 with the same bevel angle.

[0048] like Figure 1-2 As shown, the square nut 4 is adjacent to the inner wedge 3 , and the chamfered surface 38 of the outer wedge 2 is closely attached to the chamfered surface 38 of the inner wedge 3 and is connected and installed by bolts 5 .

[0049] like Figure 1-3 As shown, the outer wedge 2 and the inner wedge 3 have the same overall outer radius, and have circular holes with the same radius in the center. Both have a beveled surface 38 beveled from the middle and lower part to the top, and the angles of the beveled surface 38 are consistent.

[0050] like Figure 1-3 As shown, the diameter of the central circular hole of the outer wedge 2 and the inner wedge 3 is larger than the diameter of the bolt 5, and the diameter difference is set to D1.

[0051] like Figure 1-3 As shown, the diameters of the outer wedge 2 and the inner wedge 3 are smaller than the inner diameter of the handlebar 6 hole, and the diameter difference is set to D2.

[0052] like Figure 1-3 As shown, the above D1 should be larger than the above D2, otherwise the expansion screw cannot be tightened.

[0053] like Figure 3 , 9 As shown, when the difference between D1 and D2 is relatively large, the chamfered surfaces 38 of the outer wedge 2 and the inner wedge 3 need to remove sharp corners to prevent the sharp corners from colliding with the plug 1, and at the same time, the height of the short vertical surface 37 is appropriately increased.

[0054] like Figure 2-3 As shown, the surface where the cylinder of the inner wedge 3 is located is set as the bottom surface, and there is a beveled surface 38. The cylindrical surface intersecting the top of the beveled surface 38 is set as a high vertical surface 36, and the opposite is a low vertical surface 37. The height of the low vertical surface 37 should be close to or greater than the height of the square nut 4. If it is too low, the strength is insufficient, and if it is too high, it affects the installation size, especially the impact on the bolt 5 is too great.

[0055] like Figure 2-3As shown, the single wedge 31 is formed by cutting off more than half of the bottom surface of the inner wedge 3 cylinder, and retaining one side of the high vertical surface 36 without being cut off, thereby forming a boss on one side. The height of the single wedge 31 matches the height of the square nut 4, which can clamp the square nut 4 and prevent it from rotating. During installation, the square nut 4 and the bolt 5 can be brought close to the center of the handlebar 6, thereby preventing the bolt 5 from deforming or bending, which may cause the plug 1 to be unable to fully fit the handlebar 6 in severe cases.

[0056] like Figure 3-5 As shown, the single wedge platform 31 on the bottom surface of the single wedge platform 31 can also be replaced by a flat wedge platform 32 or a vertical wedge platform 33; the heights of the single wedge platform 31 or the flat wedge platform 32 or the vertical wedge platform 33 are basically the same; the diameter of the circumscribed circle of the square nut 4 is larger than the diameter of the inner wedge 3 and smaller than the inner hole diameter of the handlebar 6.

[0057] like Figure 6 As shown, the four sides of the square nut 4 may be unequal, and when used in conjunction with the wedge 3 inside the vertical wedge platform 33, the square nut 4 may be replaced by a standard hexagonal nut 42, or other special-shaped nuts. However, the square nut 4 and the hexagonal nut 42 are standard parts, and their use can reduce costs.

[0058] like Figure 7 As shown, the plug 1 is a cylindrical or truncated cone as a whole, with a circular hole in the center, and the circular hole matches the bolt 5.

[0059] The plug 1 is provided with a bolt groove 11 and a limiting platform 12 at the bottom.

[0060] The outer diameter of the limit platform 12 matches the inner hole of the handlebar 6 and can shake slightly after installation. In order to match handlebars of more sizes, limit rings 7 of different sizes can be set. When the inner hole and the outer diameter differ greatly, the limit ring 7 is installed on the limit platform 12. The outer diameter of the limit ring 7 is slightly smaller than the inner diameter of the handlebar 6, which is a clearance fit. The inner diameter of the limit ring is slightly larger than the outer diameter of the limit platform 12, which is also a clearance fit.

[0061] The depth and radius of the bolt groove 11 match the size of the head of the bolt 5, so that the head of the bolt 5 can be hidden in the plug 1, achieving an aesthetic effect, and can also protect the bolt 5 from being unable to be removed when the vehicle falls.

[0062] The top and bottom surfaces of the plug 1 also have chamfers and rounded transitions.

[0063] like Figure 8 As shown, the plug 1 is directly mounted on the handlebar 6 , or is mounted by adding a limiting ring 7 .

[0064] like Figure 1-8 As shown, the outer wedge 2 can be replaced by the inner wedge 3.

[0065] The inner wedge 3 with a flat single wedge platform 31 can be cut or machined on a plane using a metal tube such as an aluminum alloy with matching inner and outer diameters, including processing by wire cutting, laser cutting, water jet cutting machine or milling machine. The cut width of the single wedge platform 31 can be adjusted based on the difference between the above-mentioned D1 and the above-mentioned D2, while ensuring that the square nut 4 does not rotate, so that the bolt 5 is centered on the center of the handlebar 6 after installation.

[0066] Embodiment 2, as Figure 4 As shown, the flat wedge 32 is a centered cutout of the middle part of the bottom surface of the inner wedge 3, the cutting angle is consistent with that of the single wedge 31, the cutting width is wider than the square nut 4, and it is ensured that the square nut 4 cannot rotate in a circle inside the cutting groove, but can be slightly shaken, and after tightening, the square nut 4 can be slightly moved closer to the center of the handlebar 6; the inner wedge 3 with a flat wedge 32 can be cut or cut on a plane with a metal pipe such as an aluminum alloy with matching inner and outer diameters, including wire cutting, laser cutting, water jet cutting machine or milling machine. The main feature is that there is no need to rotate the semi-finished product 90° for secondary clamping and cutting, but the difference between the above D1 and the above D2 is required to be relatively small, otherwise the bolt 5 will be seriously off-center after installation, and if the middle of the flat wedge 32 is cut too wide, the two sides of the flat wedge 32 will be too thin and break.

[0067] Embodiment 3, as Figure 5 As shown, the vertical wedge 33 is cut off more than half of the middle part of the bottom surface of the inner wedge 3, and the cutting angle is 90 degrees with the single wedge 31. The cutting width is slightly wider than the square nut 4, and the square nut 4 cannot rotate inside the cutting groove. After installation, the square nut 4 and the bolt 5 can be approached to the center of the handlebar 6 without restriction. Regardless of the difference between the above D1 and the above D2, the bolt 5 can be completely centered in the center of the handlebar 6; the main feature is that the cutting of the beveled surface 38 and the vertical wedge 38 cannot be completed on one surface, and the semi-finished product needs to be rotated 90° for secondary clamping and cutting, which is more complicated than the other two types of inner wedges 3.

[0068] In Example 4, the inner wedge 3 and the square nut 4 can be replaced by a structure having the same appearance as the outer wedge 2 and having threads matching the bolt 5 inside the bottom cylinder.

[0069] In Example 5, the bolt 5 can also be placed in reverse for use, and the inner wedge 3 can be replaced by another outer wedge 2.

[0070] The above describes the preferred implementation of the present invention in detail, but the present invention is not limited to the above implementation. Within the knowledge of ordinary technicians in this field, various changes can be made without departing from the purpose of the present invention. Any modification, equivalent replacement and improvement made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A motorcycle handlebar expansion screw and plug, comprising a plug (1), an outer wedge (2), an inner wedge (3), a square nut (4), and a bolt (5), which is installed on a handlebar (6); Its characteristics are: The outer wedge (2) and the inner wedge (3) are in a cylindrical state as a whole, and both have a beveled surface (38) with the same beveled angle; The square nut (4) is closely adjacent to the inner wedge (3), and the chamfered surface (38) of the outer wedge (2) is closely adjacent to the chamfered surface (38) of the inner wedge (3) and is connected and installed by bolts (5); The plug (1) is directly mounted on the handlebar (6), or is mounted by adding a limiting ring (7).

2. A motorcycle handlebar expansion screw and plug according to claim 1, characterized in that: The plug (1) is a cylindrical or truncated cone as a whole, with a circular hole in the center, and the circular hole matches the bolt (5); The plug (1) has a bolt groove (11) on the top and a limiting platform (12) on the bottom; The outer diameter of the limit platform (12) matches the inner hole of the handlebar (6), and can be slightly shaken after installation; or when the inner hole and the outer diameter differ greatly, a limit ring (7) is mounted on the limit platform (12) and then installed; the outer diameter of the limit ring (7) is slightly smaller than the inner diameter of the handlebar (6) for clearance fit; the inner diameter of the limit ring (7) is slightly larger than the outer diameter of the limit platform (12) for clearance fit; The depth and radius of the bolt groove (11) match the size of the head of the bolt (5), so that the head of the bolt (5) can be hidden in the plug (1); The top and bottom surfaces of the plug (1) also have chamfers and rounded transitions.

3. A motorcycle handlebar expansion screw and plug according to claim 1, characterized in that: The outer wedge (2) and the inner wedge (3) have the same overall outer radius, and have a circular hole with the same radius in the center, and both have a beveled surface (38) beveled from the middle and lower part to the top, and the angle of the beveled surface (38) is consistent; The diameters of the central circular holes of the outer wedge (2) and the inner wedge (3) are larger than the diameter of the bolt (5), and the diameter difference is set to D1; The diameters of the outer wedge (2) and the inner wedge (3) are smaller than the inner diameter of the handlebar (6) hole, and the diameter difference is set to D2; D1>D2.

4. A motorcycle handlebar expansion screw and plug according to claim 1, characterized in that: The surface where the cylinder of the inner wedge (3) is located is set as the bottom surface, and there is also a beveled surface (38), the cylindrical surface where the top of the beveled surface (38) intersects is set as the high vertical surface (36), and the opposite is the low vertical surface (37), and the height of the low vertical surface (37) is close to or greater than the height of the square nut (4); The bottom surface is provided with a single wedge platform (31) or a flat wedge platform (32) or a vertical wedge platform (33); The single wedge platform (31) is formed by cutting off more than half of the bottom surface of the inner wedge (3) cylinder and leaving one side of the high vertical surface (36) uncut, thereby forming a boss on one side. The height of the single wedge platform (31) matches the height of the square nut (4), can clamp the square nut (4) so ​​that it cannot rotate, and can make the square nut (4) move closer to the center of the handlebar (6); The flat wedge platform (32) is cut off in the middle of the bottom surface of the inner wedge (3), the cutting angle is consistent with that of the single wedge platform (31), the cutting width is wider than the square nut (4), and it is ensured that the square nut (4) cannot rotate in the cutting groove, and the square nut (4) can be slightly moved closer to the center of the handlebar (6); The vertical wedge platform (33) is formed by cutting off more than half of the middle part of the bottom surface of the inner wedge (3), and the cutting angle is 90 degrees with the angle of the single wedge platform (31). The cutting width is slightly wider than the square nut (4), and the square nut (4) cannot rotate in the cutting groove, and the square nut (4) can be moved closer to the center of the handlebar (6) without restriction. The heights of the single wedge platform (31), the parallel wedge platform (32), or the vertical wedge platform (33) are substantially the same; The diameter of the circumscribed circle of the square nut (4) is greater than the diameter of the inner wedge (3) and smaller than the diameter of the inner hole of the handlebar (6).

5. A motorcycle handlebar expansion screw and plug according to claim 4, characterized in that: The four sides of the square nut (4) may be unequal, and when used in conjunction with the inner wedge (3) of the vertical wedge platform (33), the square nut (4) may be replaced by a standard hexagonal nut (42).

6. A motorcycle handlebar expansion screw and plug according to claim 3, characterized in that: When the difference between D1 and D2 is relatively large, the chamfered surfaces (38) of the outer wedge (2) and the inner wedge (3) need to have their sharp corners removed to prevent the sharp corners from colliding with the plug (1).

7. The motorcycle handlebar expansion screw and plug according to claim 1, characterized in that: The outer wedge (2) can be replaced by an inner wedge (3).

8. The motorcycle handlebar expansion screw and plug according to claim 1, characterized in that: The inner wedge (3) and the square nut (4) can be replaced by a structure having the same appearance as the outer wedge (2) and having threads matching the bolt (5) inside the bottom cylinder.

9. The motorcycle handlebar expansion screw and plug according to claim 1, characterized in that: The bolt (5) can also be used in reverse, and the inner wedge (3) can be replaced by another outer wedge (2).

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