Positioning device for drilling holes in bicycle rims

Abstract

The utility model discloses a positioning device for drilling holes in bicycle rims, which relates to the field of positioning tools and comprises a rotary table, first positioning devices are circumferentially arranged on the upper end face of the rotary table, first eccentric wheel devices are connected onto the first positioning devices, and lifting cylinder devices are correspondingly arranged on the outer sides of the first positioning devices. The lifting air cylinder device comprises a lifting air cylinder, the upper end of the lifting air cylinder is fixedly connected with a supporting block, the upper end of the supporting block is fixedly connected with a positioning plate, the positioning plate is distributed above the rotating table in the radial direction, and the outer end of the positioning plate is connected with a second eccentric wheel device. The first eccentric wheel device and the second eccentric wheel device are matched with each other to position and fix the rims from the inner side and the outer side, the rims with different diameters can be simply and rapidly positioned and fixed, the stress condition of the rims is improved, rim deformation is reduced, and the drilling quality of products is improved.

Description

Technical Field

[0001] The utility model belongs to the field of positioning tooling, and in particular relates to a positioning device for drilling holes in bicycle rims. Background Art

[0002] Bicycles, also known as bicycles or bikes, are common, environmentally friendly, human-powered vehicles in daily life. During bicycle production, after the bicycle rims are formed, they are drilled radially around the rims to install components such as spokes and inflator nozzles.

[0003] Chinese patent application number CN202222537163.6 discloses a bicycle rim drilling device that facilitates clamping. The device comprises a support platform, a driven turntable rotatably mounted on one side of the support platform, a positioning clamping structure movably mounted on the driven turntable, a connecting plate fixedly mounted on one side of the support platform, a driving structure fixedly mounted on the connecting plate, and a support plate fixedly mounted on one side of the connecting plate. By configuring a linkage turntable, movable clamping rods, and other structures, installation requires only placing the bicycle rim in the clamping grooves of the four movable clamping rods, starting a fixed motor, and driving the linkage turntable to rotate, causing the four movable clamping rods to simultaneously expand outward, propping up and securing the inner ring of the bicycle rim. Furthermore, the positions of the four movable clamping rods can be adjusted according to the size of the rim, making it convenient and quick to process rims of different specifications while preventing rim deviation and improving machining accuracy. However, the aforementioned positioning structure is complex and inconvenient to operate, which affects positioning efficiency. Furthermore, the outer edge of the rim is not fixed, resulting in uneven force, which makes the rim prone to deformation during positioning, fixing, or drilling, reducing product quality. Utility Model Content

[0004] In order to solve the problems raised by the above-mentioned background technology, the utility model provides a positioning device for drilling holes in bicycle rims, which can simply and quickly position and fix rims of different diameters, improve the stress condition of the rims, reduce rim deformation, and improve the drilling quality of the product.

[0005] In order to achieve the above purpose, the specific technical solutions of the present utility model are as follows:

[0006] A positioning device for drilling holes in bicycle rims comprises a rotating table, an upper end surface of which is provided with a circumferentially arranged first positioning device, a first eccentric wheel device being connected to the first positioning device, a lifting cylinder device being correspondingly provided on the outer side of the first positioning device, the lifting cylinder device comprising a lifting cylinder, an upper end of the lifting cylinder being fixedly connected to a support block, an upper end of the support block being fixedly connected to a positioning plate, the positioning plates being radially distributed above the rotating table, an outer end of the positioning plate being connected to a second eccentric wheel device, the rim being placed on the positioning plate, the first eccentric wheel device and the second eccentric wheel device cooperating with each other to position and fix the rim from the inside and outside.

[0007] As a further configuration of the above scheme, the first positioning device includes a mounting platform, which is fixedly mounted on a rotating platform. A first drive motor is fixedly mounted on the upper end surface of the mounting platform. A vertically upward damping output shaft is connected to the first drive motor. The damping output shaft can control the output power of the first drive motor. When the damping output shaft is subjected to a resistance greater than a specified resistance, the first drive motor stops and locks immediately.

[0008] As a further configuration of the above scheme, the first eccentric wheel device includes a first eccentric wheel, a first eccentric hole is opened on the first eccentric wheel, a positioning shaft ring is fixedly connected to the upper end face of the first eccentric wheel, the diameter of the positioning shaft ring is larger than the diameter of the first eccentric wheel, the positioning shaft ring is concentric with the first eccentric wheel, and the first eccentric wheel is installed on the damping output shaft through the first eccentric hole.

[0009] As a further configuration of the above scheme, the second eccentric wheel device includes a second drive motor and a second eccentric wheel, the second drive motor is fixedly mounted on the positioning plate, a second eccentric hole is opened on the second eccentric wheel, and the second eccentric wheel is mounted on the second drive motor through the second eccentric hole.

[0010] The utility model has the following beneficial effects:

[0011] The rim is placed on the positioning plate, and the lifting cylinder drives the positioning plate to rise, lifting the rim to a position flush with the first eccentric wheel. The first drive motor drives the first eccentric wheel to rotate synchronously, and the outer edge of the first eccentric wheel abuts against the inner wall of the rim, automatically centering the rim and the rotary table. At the same time, the positioning shaft ring contacts the upper end face of the rim to fix the rim in the vertical direction. The second drive motor drives the second eccentric wheel to rotate, and the outer edge of the second eccentric wheel abuts against the outer wall of the rim to fix the rim from the outside. At the same time, the contact points between the first eccentric wheel and the rim and the contact points between the second eccentric wheel and the rim are staggered inside and outside to ensure that the rim is evenly compressed and reduce deformation. This device can simply and quickly position and fix rims of different diameters, improve the stress condition of the rim, reduce rim deformation, and improve the drilling quality of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a schematic diagram of the appearance of the utility model;

[0013] Figure 2 It is a cross-sectional schematic diagram of the present utility model;

[0014] Figure 3 It is a schematic diagram of the first positioning device and the lifting cylinder device of the utility model;

[0015] Figure 4 This is a schematic diagram of the first eccentric wheel device of the utility model;

[0016] Figure 5It is the second eccentric device schematic view of the utility model.

[0017] 1, rotating table; 2, first positioning device; 3, first eccentric device; 4, lifting cylinder device; 5, second eccentric device; 6, wheel rim; 201, mounting table; 202, first drive motor; 203, damping output shaft; 301, first eccentric; 302, first eccentric hole; 303, positioning collar; 401, lifting cylinder; 402, support block; 403, positioning plate; 501, second drive motor; 502, second eccentric; 5021, second eccentric hole. DETAILED DESCRIPTION

[0018] In order to make the person in this field better understand the present application scheme, the following will be combined with the drawings in the embodiments of the present application, the technical scheme in the embodiments of the present application is described clearly and completely, obviously, the described embodiments are only a part of the embodiments of the present application, not all. Based on the embodiments in the present application, all other embodiments obtained by the person skilled in the art without creative labor should belong to the scope of protection of the present application.

[0019] It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The following will be described in detail with reference to the drawings Figures 1 to 5 and combined with the embodiments of the present application.

[0020] As shown in Figure 1 , Figure 2 , a positioning device for drilling bicycle wheel rim, rotating table 1 upper end face is provided with circumferential arrangement of first positioning device 2, first positioning device 2 is connected with first eccentric device 3, first positioning device 2 outer side is provided with lifting cylinder device 4 correspondingly, lifting cylinder device 4 includes lifting cylinder 401, lifting cylinder 401 upper end is fixedly connected with support block 402, support block 402 upper end is fixedly connected with positioning plate 403, positioning plate 403 is distributed radially above rotating table 1, positioning plate 403 outer end is connected with second eccentric device 5, wheel rim 6 is placed on positioning plate 403, first eccentric device 3 and second eccentric device 5 are positioned and fixed from inside and outside with each other.

[0021] As shown in Figure 3 , the first positioning device 2 includes mounting table 201, mounting table 201 is fixedly installed on rotating table 1, mounting table 201 upper end surface is fixedly installed with first drive motor 202, first drive motor 202 is connected with vertical upward damping output shaft 203, damping output shaft 203 can control the output power of first drive motor 202, when damping output shaft 203 is subjected to greater than defined resistance, first drive motor 202 stops and locks immediately.

[0022] like Figure 4 As shown, the first eccentric wheel device 3 includes a first eccentric wheel 301, a first eccentric hole 302 is opened on the first eccentric wheel 301, and a positioning collar 303 is fixedly connected to the upper end face of the first eccentric wheel 302. The diameter of the positioning collar 303 is larger than the diameter of the first eccentric wheel 301, and the positioning collar 303 is concentric with the first eccentric wheel 301. The first eccentric wheel 301 is installed on the damping output shaft 203 through the first eccentric hole 302.

[0023] like Figure 5 As shown, the second eccentric wheel device 5 includes a second drive motor 501 and a second eccentric wheel 502. The second drive motor 501 is fixedly mounted on the positioning plate 403. The second eccentric wheel 502 is provided with a second eccentric hole 5021. The second eccentric wheel 502 is mounted on the second drive motor 501 through the second eccentric hole 5021.

[0024] The working process of the present invention is as follows: the rim 6 is placed on the positioning plate 403, the lifting cylinder 401 drives the positioning plate 403 to rise, and the rim 6 is lifted to a position flush with the first eccentric wheel 301, and the first drive motor 202 drives the first eccentric wheel 301 to rotate synchronously, and the outer edge of the first eccentric wheel 301 abuts against the inner wall of the rim 6, automatically centering the rim 6 and the rotating table 1. At the same time, the positioning shaft ring 303 contacts the upper end surface of the rim 6 to fix the rim 6 in the vertical direction. After the rim 6 is centered, the resistance to the first eccentric wheel 301 increases. When the damping output shaft 203 is subjected to a resistance greater than the specified resistance, the first drive motor 202 immediately stops and locks. At this time, the first eccentric wheel 301 is fixed to prevent the rim 6 from being stretched and deformed; the second drive motor 501 drives the second eccentric wheel 502 to rotate, and the outer edge of the second eccentric wheel 502 abuts against the outer wall of the rim 6, fixing the rim 6 from the outside.

[0025] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It is obvious to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments and that the present invention can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. Therefore, from all points of view, the embodiments should be regarded as illustrative and non-restrictive. The scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes that come within the meaning and range of equivalents of the claims be included in the present invention.

[0026] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A positioning device for drilling holes in bicycle rims, comprising a rotating table, characterized in that: A first positioning device arranged in a circumferential manner is provided on the upper end surface of the rotating table, and a first eccentric wheel device is connected to the first positioning device. A lifting cylinder device is correspondingly provided on the outer side of the first positioning device. The lifting cylinder device includes a lifting cylinder, and a support block is fixedly connected to the upper end of the lifting cylinder. A positioning plate is fixedly connected to the upper end of the support block. The positioning plates are radially distributed above the rotating table, and the outer end of the positioning plate is connected to the second eccentric wheel device.

2. The positioning device for drilling a bicycle rim according to claim 1, characterized in that: The first positioning device includes a mounting platform, which is fixedly mounted on the rotating platform. A first driving motor is fixedly mounted on the end surface of the mounting platform, and a vertically upward damping output shaft is connected to the first driving motor.

3. The positioning device for drilling a bicycle rim according to claim 2, characterized in that: The first eccentric wheel device includes a first eccentric wheel, a first eccentric hole is opened on the first eccentric wheel, a positioning collar is fixedly connected to the upper end face of the first eccentric wheel, the diameter of the positioning collar is larger than the diameter of the first eccentric wheel, the positioning collar is concentric with the first eccentric wheel, and the first eccentric wheel is installed on the damping output shaft through the first eccentric hole.

4. The positioning device for drilling a bicycle rim according to claim 2, characterized in that: The second eccentric wheel device includes a second drive motor and a second eccentric wheel. The second drive motor is fixedly mounted on the positioning plate. A second eccentric hole is opened on the second eccentric wheel. The second eccentric wheel is mounted on the second drive motor through the second eccentric hole.

Images