A fool-proof bush structure

Abstract

The utility model discloses a kind of foolproof bushing structures, including handlebar vertical pipe, front fork vertical pipe, bolt and nut, and the outside wall of handlebar vertical pipe is through with the insertion hole, handlebar vertical pipe is set in the outside of front fork vertical pipe;It further includes fastening bushing, the outside wall of fastening bushing is provided with first locating surface, the inner side wall of insertion hole is provided with second locating surface, fastening bushing is inserted into insertion hole and with the outer surface of front fork vertical pipe is pasted, first locating surface and second locating surface are opposite and pasted, the end of bolt is from fastening bushing, handlebar vertical pipe, front fork vertical pipe, nut is screwed on bolt and with the outer surface of handlebar vertical pipe is abutted.Assembling by first locating surface and second locating surface can be fastening bushing is placed right, and it plays the role of foolproof to fastening bushing, prevent when screwing nut, bolt pneumatic screw gun rotation vibration causes fastening bushing to occur dislocation, prevent handlebar after long time riding vibration and loosen.

Description

Technical Field

[0001] This utility model relates to the technical field of electric vehicles, and in particular to a foolproof bushing structure. Background Technology

[0002] As a safety component of two-wheeled electric vehicles, the handlebars are required to remain secure even after prolonged riding vibrations. Therefore, the screw structure for securing the handlebars must be designed to prevent loosening.

[0003] There is a bushing structure on the market that includes a bolt, a nut, and a hollow circular bushing. When fixing the handlebar stem to the fork stem, first, the handlebar stem is placed over the fork stem. Then, the circular bushing is inserted into the fixing hole on the handlebar stem. After the bolt passes through the circular bushing, the handlebar stem, and the fork stem, the bolt is tightened onto the handlebar stem using the nut to secure it.

[0004] When assembling handlebars at high frequency on the assembly line, it is common for the round bushings to be misaligned and then tightened directly. This can cause the handlebars to loosen after prolonged riding and vibration, affecting riding safety. This needs to be improved. Summary of the Invention

[0005] This invention addresses the shortcomings of existing technologies, such as misalignment of the circular bushings when pre-assembled on the handlebar stem, which affects the stability of the handlebars. It provides a new foolproof bushing structure.

[0006] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution:

[0007] A foolproof bushing structure includes a handlebar stem, a fork stem, a bolt, and a nut. The handlebar stem has a through-hole on its outer side wall, and the handlebar stem is fitted over the fork stem. It also includes a fastening bushing with a first positioning surface on its outer side wall and a second positioning surface on the inner side wall of the through-hole. The fastening bushing is inserted into the through-hole and abuts against the outer surface of the fork stem. The first and second positioning surfaces are directly opposite and abut against each other. The end of the bolt protrudes from the fastening bushing, the handlebar stem, and the fork stem. The nut is tightened onto the bolt and abuts against the outer surface of the handlebar stem.

[0008] During assembly, the first and second positioning surfaces can be used to align the fastening bushing, which can prevent the fastening bushing from being mistaken. The cooperation between the first and second positioning surfaces can limit the position of the fastening bushing, preventing the fastening bushing from being misaligned due to the rotation and vibration of the pneumatic screwdriver when tightening nuts and bolts, and preventing the handlebars from loosening after long-term riding vibration.

[0009] Preferably, in the above-described foolproof bushing structure, the number of the first positioning surfaces is several, and the first positioning surfaces are distributed at intervals on the outer side wall of the fastening bushing, and the number of the second positioning surfaces corresponds one-to-one with the number of the first positioning surfaces.

[0010] The first and second positioning surfaces are provided in multiple and spaced apart, which can limit the fastening bushing at multiple points, further improving the stability of the fastening bushing when fitted into the insertion hole and facilitating the assembly of the fastening bushing.

[0011] Preferably, in the above-described foolproof bushing structure, a fastening notch is provided through the first positioning surface, the fastening notch extends along the width direction of the first positioning surface, and the opening of the fastening notch is located at the rear end of the fastening bushing.

[0012] When the fastening bushing is pressed into the insertion hole by the bolt, the fastening notch causes the fastening bushing to open slightly under the pressure of the bolt and abut against the outer surface of the fork stem. This creates a tension structure between the handlebar stem and the fork stem, locking the handlebar stem onto the fork stem and further facilitating the assembly of the handlebar stem and the fork stem.

[0013] Preferably, in the above-described foolproof bushing structure, the length of the first positioning surface is adapted to the length of the second positioning surface, and the width of the first positioning surface is greater than the width of the second positioning surface.

[0014] The width of the first positioning surface is greater than that of the second positioning surface, which facilitates the quick and accurate insertion of the fastening bushing into the insertion hole by the assembly machine or personnel, and prevents the fastening bushing from falling off during assembly.

[0015] Preferably, in the aforementioned foolproof bushing structure, the rear end of the fastening bushing has an inwardly recessed cutting surface, the cutting surface is arc-shaped, the opening of the fastening notch is located on the cutting surface, and the cutting surface is in contact with the outer surface of the fork riser.

[0016] The cut surface improves the fit between the fastening bushing and the outer wall of the fork stem, further enhancing the reliability of the fastening bushing when securing the fork stem and handlebar stem. At the same time, the cut surface makes it easier to distinguish the insertion direction of the fastening bushing into the insertion hole, further facilitating the assembly of the fastening bushing.

[0017] Preferably, in the above-described foolproof bushing structure, the rear end of the fastening bushing is provided with a relief surface, and the end of the relief surface gradually slopes inward toward the rear end of the fastening bushing.

[0018] The clearance surface allows for easier insertion of the fastening bushing into the mating hole, improving the smoothness of the fastening bushing installation.

[0019] Preferably, in the aforementioned foolproof bushing structure, the relief surface is located outside the cutting surface, and a reinforcing plane is provided between the end of the relief surface and the cutting surface.

[0020] The reinforced plane improved the structural strength of the rear end of the fastening bushing and enhanced the stability of the cut surface pressed against the outer wall of the fork riser.

[0021] As a preferred embodiment, in the aforementioned foolproof bushing structure, a groove is provided on the outer wall of the handlebar stem, the end of the bolt protrudes from the groove, and the end of the nut covers the opening of the groove and is tightened onto the bolt.

[0022] The groove increases the contact point between the end of the nut and the handlebar stem, improving the stability of the nut when tightened onto the bolt. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the exploded structure of this utility model;

[0024] Figure 2 This is a cross-sectional view illustrating the settling tank of this utility model;

[0025] Figure 3 This is a schematic diagram of the structure of the fastening bushing of this utility model;

[0026] Figure 4 This is a cross-sectional view illustrating the insertion hole and fastening bushing of this utility model.

[0027] Explanation of reference numerals in the attached drawings: 1. Handlebar stem; 11. Insertion hole; 111. Second positioning surface; 12. Slot; 2. Fork stem; 3. Bolt; 4. Nut; 5. Fastening bushing; 51. First positioning surface; 511. Fastening notch; 52. Cutting surface; 53. Leaving surface; 54. Reinforcing surface. Detailed Implementation

[0028] The following is in conjunction with the appendix Figure 1-4 The present invention will be further described in detail with reference to specific embodiments, but these are not intended to limit the present invention:

[0029] Example 1

[0030] like Figures 1-4As shown, a foolproof bushing structure includes a handlebar stem 1, a fork stem 2, a bolt 3, and a nut 4. The outer wall of the handlebar stem 1 has a through-hole 11, and the handlebar stem 1 is sleeved on the outside of the fork stem 2. It also includes a fastening bushing 5, the outer wall of which has a first positioning surface 51, and the inner wall of the through-hole 11 has a second positioning surface 111. The fastening bushing 5 is inserted into the through-hole 11 and is in contact with the outer surface of the fork stem 2. The first positioning surface 51 and the second positioning surface 111 are directly opposite and in contact with each other. The end of the bolt 3 protrudes from the fastening bushing 5, the handlebar stem 1, and the fork stem 2. The nut 4 is tightened on the bolt 3 and abuts against the outer surface of the handlebar stem 1.

[0031] Preferably, there are several first positioning surfaces 51, which are distributed at intervals on the outer side wall of the fastening bushing 5, and the number of second positioning surfaces 111 corresponds one-to-one with the number of first positioning surfaces 51.

[0032] Preferably, a fastening notch 511 is provided on the first positioning surface 51, the fastening notch 511 extends along the width direction of the first positioning surface 51, and the opening of the fastening notch 511 is located at the rear end of the fastening bushing 5.

[0033] Preferably, the length of the first positioning surface 51 is adapted to the length of the second positioning surface 111, and the width of the first positioning surface 51 is greater than the width of the second positioning surface 111.

[0034] Preferably, the rear end of the fastening bushing 5 has an inwardly recessed cutting surface 52, the cutting surface 52 is arc-shaped, the opening of the fastening notch 511 is located on the cutting surface 52, and the cutting surface 52 is in contact with the outer surface of the front fork riser 2.

[0035] Preferably, the rear end of the fastening bushing 5 is provided with a relief surface 53, and the end of the relief surface 53 gradually slopes inward toward the rear end of the fastening bushing 5.

[0036] Preferably, the yielding surface 53 is located outside the cutting surface 52, and a reinforcing plane 54 is provided between the end of the yielding surface 53 and the cutting surface 52.

[0037] Preferably, the outer surface of the handlebar stem 1 is provided with a groove 12, the end of the bolt 3 protrudes from the groove 12, and the end of the nut 4 covers the opening of the groove 12 and is tightened onto the bolt 3.

[0038] Specifically, such as Figures 1-4As shown in this embodiment, the upper end of the fastening bushing 5 has a through hole. Two first positioning surfaces 51 are symmetrically distributed on the upper and lower sides of the fastening bushing 5. The sides of the fastening bushing 5 adjacent to the first positioning surfaces 51 are arc-shaped. The number of first positioning surfaces 51 can be increased or decreased according to the size of the fastening bushing 5 and assembly requirements. The first positioning surfaces 51 are rectangular and extend along the width direction of the fastening bushing 5. The number of second positioning surfaces 111 corresponds to the number of first positioning surfaces 51, with the two second positioning surfaces 111 distributed on the upper and lower sides of the insertion hole 11, respectively.

[0039] The cutting surface 52 and the relief surface 53 are distributed at the rear end of the fastening bushing 5. The cutting surface 52 is an inwardly concave arc shape, and the relief surface 53 is an outwardly protruding arc shape. The reinforcing plane 54 is distributed between the cutting surface 52 and the relief surface 53. The cutting surface 52 is distributed outside the circular hole. The end of the cutting surface 52 near the first positioning surface 51 is lower than the end of the cutting surface 52 near the reinforcing plane 54.

[0040] The fastening notch 511 is connected to the round hole. The width of the fastening notch 511 extends along the width direction of the first positioning surface 51. One side opening of the fastening notch 511 is distributed on the cutting surface 52, and the other side opening of the fastening notch 511 is distributed on the first positioning surface 51.

[0041] Bolt 3 is an M10*50 external hexagonal flange bolt, nut 4 is an M10 external hexagonal flange self-locking nut, and fastening bushing 5 is made of elastic rubber, plastic and other materials. The groove 12 extends along the height direction of the handlebar stem 1, and the end of bolt 3 passes through the groove 12. The width of the groove 12 is smaller than the width of the end of nut 4.

[0042] More specifically, when assembling the fastening bushing 5 with the handlebar stem 1 and the fork stem 2, first, put the handlebar stem 1 on the fork stem 2, then align the rear end of the fastening bushing 5 with the insertion hole 11 and insert it into the insertion hole 11. Then, pass one end of the bolt 3 through the round hole, the handlebar stem 1, and the fork stem 2. At this time, tighten the nut 4 on the bolt 3 to lock the handlebar stem 1 onto the fork stem 2.

[0043] After the fastening bushing 5 is inserted into the insertion hole 11, the cut surface 52 is in contact with the outer surface of the fork stem 2. When the nut 4 is tightened onto the bolt 3, the rear end of the fastening bushing 5 is pressed by the nut 4 and slightly opens through the fastening notch 511, thereby making the cut surface 52 fit more closely with the outer surface of the fork stem 2. A tension structure is formed between the handlebar stem 1 and the fork stem 2, and the handlebar stem 1 is locked onto the fork stem 2. At the same time, the first positioning surface 51 and the second positioning surface 111 realize the foolproof limit of the fastening bushing 5, preventing the fastening bushing 5 from being misaligned when tightening the nut 4, and facilitating the assembly between the handlebar stem 1, the fork stem 2 and the fastening bushing 5.

[0044] In summary, the above description is only a preferred embodiment of the present utility model. All equivalent changes and modifications made within the scope of the patent application of the present utility model shall be covered by the present utility model.

Claims

1. A foolproof bushing structure, comprising a handlebar stem (1), a fork stem (2), bolts (3) and nuts (4), wherein a insertion hole (11) is provided through the outer wall of the handlebar stem (1), and the handlebar stem (1) is sleeved on the outside of the fork stem (2); characterized in that: It also includes a fastening bushing (5), on the outer side wall of the fastening bushing (5) is a first positioning surface (51), and on the inner side wall of the insertion hole (11) is a second positioning surface (111). The fastening bushing (5) is inserted into the insertion hole (11) and is in contact with the outer surface of the fork stem (2). The first positioning surface (51) and the second positioning surface (111) are directly opposite and in contact. The end of the bolt (3) passes through the fastening bushing (5), the handlebar stem (1), and the fork stem (2). The nut (4) is tightened on the bolt (3) and abuts against the outer surface of the handlebar stem (1).

2. The foolproof bushing structure according to claim 1, characterized in that: The number of the first positioning surfaces (51) is several, and the first positioning surfaces (51) are distributed at intervals on the outer side wall of the fastening bushing (5). The number of the second positioning surfaces (111) corresponds one-to-one with the number of the first positioning surfaces (51).

3. The foolproof bushing structure according to claim 2, characterized in that: A fastening notch (511) is provided on the first positioning surface (51). The fastening notch (511) extends along the width direction of the first positioning surface (51), and the opening of the fastening notch (511) is located at the rear end of the fastening bushing (5).

4. The foolproof bushing structure according to claim 1, characterized in that: The length of the first positioning surface (51) is adapted to the length of the second positioning surface (111), and the width of the first positioning surface (51) is greater than the width of the second positioning surface (111).

5. The foolproof bushing structure according to claim 3, characterized in that: The rear end of the fastening bushing (5) has an inwardly recessed cutting surface (52), the cutting surface (52) is arc-shaped, the opening of the fastening notch (511) is located on the cutting surface (52), and the cutting surface (52) is in contact with the outer surface of the fork riser (2).

6. The foolproof bushing structure according to claim 5, characterized in that: The rear end of the fastening bushing (5) is provided with a relief surface (53), and the end of the relief surface (53) gradually slopes inward toward the rear end of the fastening bushing (5).

7. The foolproof bushing structure according to claim 6, characterized in that: The yielding surface (53) is located outside the cutting surface (52), and a reinforcing surface (54) is provided between the end of the yielding surface (53) and the cutting surface (52).

8. The foolproof bushing structure according to claim 1, characterized in that: The outer wall of the handlebar stem (1) is provided with a groove (12), the end of the bolt (3) protrudes from the groove (12), and the end of the nut (4) covers the opening of the groove (12) and is tightened on the bolt (3).

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