Internal expansion clamping mechanism for assembling bicycle

Abstract

The internal expansion clamping mechanism comprises a center box, the front side of the center box is in threaded connection with an inflation pipe communicated with the interior of the center box, the outer side of the center box is rotationally connected with a threaded telescopic pipe, the tail end of the threaded telescopic pipe is fixedly connected with a hollow frame, arc-shaped openings are formed in the two ends of the hollow frame, and the arc-shaped openings are communicated with the inflation pipe. An inner cavity of the hollow frame is of a hollow structure and communicates with the interior of the center box through a threaded telescopic pipe, auxiliary telescopic air bags are in threaded connection with the two sides of the outer wall of the hollow frame, a main telescopic air bag is further arranged in the middle of the hollow frame, and the auxiliary telescopic air bags and the main telescopic air bag communicate with the inner cavity of the hollow frame. And a groove is formed in the top of the hollow frame. By means of the arrangement of the soft rubber mat, abrasion between the inner container and the hollow frame can be prevented, meanwhile, the main telescopic air bag and the auxiliary telescopic air bag are adopted to conduct internal expansion clamping on the tire component, damage to the outer side of the tire component can be prevented, and the practicability of the device is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of internal expansion jigs, and particularly relates to an internal expansion clamping mechanism for bicycle assembly. Background Art

[0002] A bicycle, also known as a pedal bike or a bicycle, is usually a small two-wheeled vehicle on land. After a person rides on it, it uses the foot pedal as power and is an environmentally friendly means of transportation. Bicycles are traditional industries with a history of more than 100 years. Due to environmental protection and traffic problems, bicycles have once again become popular means of transportation and fitness tools for residents in various countries, especially in developed countries. The focus of the world bicycle industry is shifting from traditional means of transportation for commuting to sports, mountain, and leisure types. Bicycles are relatively common sports, fitness, leisure, and entertainment products. During the assembly process of bicycles, it is often necessary to use an internal expansion clamping mechanism to clamp bicycle components to facilitate bicycle assembly.

[0003] The patent with the publication number CN212919045U discloses an internal expansion jig for thin-walled flexible parts, including an external fixed clamping device and an internal expansion clamping device. The internal expansion clamping device includes an internal bottom plate, a plurality of internal guide rails, and a plurality of internal clamping jaws. The plurality of internal guide rails are fixedly arranged on the internal bottom plate, and each internal guide rail is provided with one of the internal clamping jaws; the plurality of internal clamping jaws jointly clamp the inner surface of the circumference of the thin-walled flexible part; the external clamping device includes a base and a plurality of external clamping jaws fixed on the base; the internal bottom plate is arranged in the middle area surrounded by the plurality of external clamping jaws. The external jig for thin-walled flexible parts designed by adopting this scheme can clamp thin-walled flexible parts well.

[0004] However, when the above-mentioned internal expansion jig for thin-walled flexible parts is actually used, there are still many disadvantages. For example, when assembling a bicycle tire, since the clamping devices of this jig are all rigid components, it is easy to damage the bicycle tire during clamping, and it is not convenient to clamp arc-shaped workpieces, resulting in poor practicability. Summary of the Utility Model

[0005] The purpose of this part is to outline some aspects of the embodiments of the present utility model and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this part, as well as in the abstract and the title of the description of this application, to avoid obscuring the purpose of this part, the abstract, and the title of the utility model. However, such simplifications or omissions shall not be used to limit the scope of the present utility model.

[0006] To solve the above problems, the present utility model adopts the following technical solutions.

[0007] The internal expansion clamping mechanism for bicycle assembly includes a central box. A gas charging pipe communicating with the inside of the central box is threadedly connected to the front side of the central box. A threaded telescopic pipe is rotatably connected to the outside of the central box. The end of the threaded telescopic pipe is fixedly connected to a hollow frame. Arc-shaped openings are formed at both ends of the hollow frame, and the inner cavity of the hollow frame is a hollow structure. The inner cavity of the hollow frame communicates with the inside of the central box through the threaded telescopic pipe. Secondary telescopic air bags are threadedly connected to both sides of the outer wall of the hollow frame, and a main telescopic air bag is also arranged in the middle of the hollow frame. The secondary telescopic air bags and the main telescopic air bag communicate with the inner cavity of the hollow frame. A groove is formed at the top of the hollow frame, and soft rubber pads are fixedly connected to both sides of the groove of the hollow frame.

[0008] Preferably, the threaded telescopic pipes are evenly distributed in a ring shape about the central axis of the gas charging pipe, and a sealing plug is threadedly connected to the end of the gas charging pipe.

[0009] Preferably, an electric push rod for moving the central box back and forth is rotatably connected to the rear end of the central box, and the electric push rod and the gas charging pipe are coaxially arranged.

[0010] Preferably, a movable block is fixedly connected to the end of the electric push rod. A carrier is arranged outside the movable block. Slide grooves for the movable block to move up and down are formed on both sides of the inner wall of the carrier, and the movable block and the slide grooves are connected by sliders.

[0011] Preferably, a lifting rod for adjusting the height of the movable block is fixedly connected to the middle of the carrier, and the top end of the lifting rod is fixedly connected to the movable block.

[0012] Preferably, a rotating column for axially rotating the carrier is arranged at the bottom of the carrier, and the central axis of the rotating column coincides with the vertical center line of the carrier.

[0013] Preferably, the bottom end of the rotating column is rotatably connected to a chassis, and arc-shaped notches for installing and fixing the chassis are arranged outside the chassis, and the arc-shaped notches are evenly distributed in a ring shape about the central axis of the chassis.

[0014] Preferably, handles are fixedly connected to both sides of the outer wall of the carrier, and the handles are symmetric about the vertical center line of the carrier.

[0015] Beneficial effects

[0016] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0017] The utility model can inflate the main telescopic airbag and the auxiliary telescopic airbag through the inflation tube, the threaded telescopic tube and the inner cavity of the hollow frame, so that the main telescopic airbag and the auxiliary telescopic airbag are stretched. The stretching of the auxiliary telescopic airbag can open the two sides of the inner wall of the tire outer skin. The tire liner can be pushed into the outer skin through the stretching of the main telescopic airbag, which is convenient for assembling the bicycle tire. The provision of the soft rubber pad can prevent wear between the liner and the hollow frame. At the same time, the main telescopic airbag and the auxiliary telescopic airbag are used to expand and clamp the tire components, which can prevent damage to the outer side of the tire components, thereby improving the practicality of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the utility model;

[0019] Figure 2 It is a schematic diagram of the overall front view structure of the utility model;

[0020] Figure 3 This is a schematic diagram of the back three-dimensional structure of the utility model;

[0021] Figure 4 It is a partial three-dimensional structural schematic diagram of the utility model;

[0022] Figure 5 It is a schematic diagram of the overall top view structure of the utility model.

[0023] The corresponding relationship between the illustrations and component names in the figure is as follows:

[0024] 1. Center box; 2. Inflatable tube; 3. Threaded telescopic tube; 4. Hollow frame; 5. Secondary telescopic airbag; 6. Main telescopic airbag; 7. Soft rubber pad; 8. Sealing plug; 9. Electric push rod; 10. Movable block; 11. Carrier; 12. Slide; 13. Rotating column; 14. Chassis; 15. Arc notch; 16. Lifting rod; 17. Handle. DETAILED DESCRIPTION

[0025] In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0026] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0027] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not refer to the same embodiment, nor is it a separate or selective embodiment that is mutually exclusive with other embodiments. The present invention provides the following embodiments.

[0028] See also Figures 1-5 The utility model provides an embodiment: an internal expansion clamping mechanism for assembling a bicycle, comprising a center box 1, a front side of the center box 1 is threadedly connected with an inflation tube 2 that communicates with the interior of the center box 1, a threaded telescopic tube 3 is rotatably connected to the outer side of the center box 1, a hollow frame 4 is fixedly connected to the end of the threaded telescopic tube 3, arc-shaped openings are provided at both ends of the hollow frame 4, and the inner cavity of the hollow frame 4 is a hollow structure, the arc-shaped opening on the hollow frame 4 facilitates the hollow frame 4 to contact with the arc-shaped device, thereby facilitating the contact of the hollow frame 4 with the bicycle tire component, the inner cavity of the hollow frame 4 is communicated with the interior of the center box 1 through the threaded telescopic tube 3, both sides of the outer wall of the hollow frame 4 are threadedly connected with auxiliary telescopic airbags 5, and a main telescopic airbag 6 is also arranged in the middle of the hollow frame 4, the auxiliary telescopic airbag 5 and the main telescopic airbag 6 are both communicated with the inner cavity of the hollow frame 4, and the top of the hollow frame 4 is opened. A groove is provided, and soft rubber pads 7 are fixedly connected on both sides of the groove of the hollow frame 4. The threaded telescopic tube 3 is evenly distributed in a ring shape about the central axis of the inflation tube 2. The end of the inflation tube 2 is threadedly connected with a sealing plug 8. The sealing plug 8 can be rotated to open the inflation tube 2. Through the inflation tube 2, in cooperation with the threaded telescopic tube 3 and the inner cavity of the hollow frame 4, the main telescopic airbag 6 and the auxiliary telescopic airbag 5 can be inflated, so that the main telescopic airbag 6 and the auxiliary telescopic airbag 5 are stretched. The stretching of the auxiliary telescopic airbag 5 can open the inner wall of the tire outer skin. Through the stretching of the main telescopic airbag 6, the tire liner can be pushed into the inner skin, which is convenient for the assembly of the bicycle tire. The setting of the soft rubber pad 7 can prevent wear between the liner and the hollow frame 4. At the same time, the main telescopic airbag 6 and the auxiliary telescopic airbag 5 are used to expand and clamp the tire components, which can prevent damage to the outer side of the tire components.

[0029] In this embodiment, an electric push rod 9 is rotatably connected to the rear end of the central box 1, which can make the central box 1 move back and forth. The electric push rod 9 and the air charging pipe 2 are coaxially arranged. The end of the electric push rod 9 is fixedly connected with a movable block 10. A carrier 11 is arranged outside the movable block 10. Chutes 12 for the movable block 10 to move up and down are provided on both sides of the inner wall of the carrier 11. The movable block 10 and the chutes 12 are connected by sliders. Further, a lifting rod 16 for adjusting the height of the movable block 10 is fixedly connected to the middle of the carrier 11, and the top end of the lifting rod 16 is fixedly connected to the movable block 10. By means of the electric push rod 9, the front-back distance between the central box 1 and the movable block 10 can be adjusted to facilitate adapting to tires of different widths. By means of the lifting rod 16, the movable block 10 can be moved up and down to facilitate adjusting the height of the central box 1. The arrangement of the chutes 12 and the sliders on the carrier 11 can ensure the stability of the up-and-down movement of the movable block 10.

[0030] In this embodiment, handles 17 are fixedly connected to both sides of the outer wall of the carrier 11, and the handles 17 are symmetric about the vertical center line of the carrier 11. Through the arrangement of the handles 17, the device can be lifted, which is convenient for carrying and moving the device.

[0031] Working principle: When using the device, first place the device on the external horizontal plane through the chassis 14, and use the arc-shaped notch 15 and the bolts to fix the chassis 14 to the external horizontal plane to complete the installation of the device. Use the rotating column 13 to rotate the carrier 11, so as to adjust the direction of the device. Place the inner liner of the bicycle tire to be installed on the main telescopic airbag 6 in the groove of the hollow frame 4. The arc-shaped opening on the hollow frame 4 facilitates the contact between the hollow frame 4 and the arc-shaped device. Place the outer skin of the bicycle tire on the hollow frame 4 so that the auxiliary telescopic airbag 5 is located inside the outer skin. According to the size of the bicycle tire, rotate the threaded telescopic tube 3 to adjust the distance between the hollow frame 4 and the center box 1, so that the outer skin of the bicycle tire can be propped up. Rotate the sealing plug 8 to open the inflation tube 2. Through the inflation tube 2, in cooperation with the threaded telescopic tube 3 and the inner cavity of the hollow frame 4, the main telescopic airbag 6 and the auxiliary telescopic airbag 5 can be adjusted. The airbag 5 is inflated, so that the main telescopic airbag 6 and the auxiliary telescopic airbag 5 are stretched. The stretching of the auxiliary telescopic airbag 5 can open the inner walls of the tire skin on both sides. The tire liner can be pushed into the outer skin by stretching the main telescopic airbag 6, which is convenient for assembling the bicycle tire. The setting of the soft rubber pad 7 can prevent wear between the liner and the hollow frame 4. At the same time, the main telescopic airbag 6 and the auxiliary telescopic airbag 5 are used to expand and clamp the tire components, which can prevent damage to the outer side of the tire components, thereby improving the practicality of the device. The front and rear distance between the center box 1 and the movable block 10 can be adjusted by the electric push rod 9 to adapt to tires of different widths. The movable block 10 can be moved up and down by the lifting rod 16 to facilitate adjusting the height of the center box 1. The setting of the slide groove 12 and the slider on the carrier 11 can ensure the stability of the up and down movement of the movable block 10. The device can be lifted by the setting of the handle 17, which is convenient for carrying and moving the device.

[0032] The above content is a further detailed description of the utility model in combination with specific implementation methods. It cannot be determined that the specific implementation of the utility model is limited to these descriptions. For ordinary technicians in the technical field to which the utility model belongs, without departing from the concept of the utility model, they can also make several simple deductions or substitutions, which should be regarded as belonging to the scope of protection determined by the claims submitted for the utility model.

Claims

1. An internal expansion clamping mechanism for bicycle assembly, comprising a center box (1), characterized in that: The front side of the central box (1) is threadedly connected to an inflation tube (2) which communicates with the interior of the central box (1); the outer side of the central box (1) is rotatably connected to a threaded telescopic tube (3); the end of the threaded telescopic tube (3) is fixedly connected to a hollow frame (4); arc-shaped openings are provided at both ends of the hollow frame (4); the inner cavity of the hollow frame (4) is a hollow structure; the inner cavity of the hollow frame (4) communicates with the interior of the central box (1) through the threaded telescopic tube (3); both sides of the outer wall of the hollow frame (4) are threadedly connected to auxiliary telescopic airbags (5); a main telescopic airbag (6) is further provided in the middle of the hollow frame (4); both the auxiliary telescopic airbag (5) and the main telescopic airbag (6) are in communication with the inner cavity of the hollow frame (4); a groove is provided at the top of the hollow frame (4); and soft rubber pads (7) are fixedly connected to both sides of the groove of the hollow frame (4).

2. The internal expansion clamping mechanism for bicycle assembly according to claim 1, characterized in that: The threaded telescopic tubes (3) are evenly distributed in a ring shape about the central axis of the inflation tube (2), and a sealing plug (8) is threadedly connected to the end of the inflation tube (2).

3. The internal expansion clamping mechanism for bicycle assembly according to claim 2, characterized in that: The rear end of the central box (1) is rotatably connected to an electric push rod (9) which enables the central box (1) to move forward and backward, and the electric push rod (9) and the inflation tube (2) are coaxially arranged.

4. The internal expansion clamping mechanism for bicycle assembly according to claim 3, characterized in that: A movable block (10) is fixedly connected to the end of the electric push rod (9), a carrier (11) is arranged outside the movable block (10), and sliding grooves (12) for allowing the movable block (10) to move up and down are provided on both sides of the inner wall of the carrier (11), and the movable block (10) and the sliding groove (12) are connected via a slider.

5. The internal expansion clamping mechanism for bicycle assembly according to claim 4, characterized in that: A lifting rod (16) for adjusting the height of the movable block (10) is fixedly connected in the middle of the carrier (11), and the top end of the lifting rod (16) is fixedly connected to the movable block (10).

6. The internal expansion clamping mechanism for bicycle assembly according to claim 4, characterized in that: A rotating column (13) is provided at the bottom of the carrier (11) to enable the carrier (11) to rotate axially, and the central axis of the rotating column (13) coincides with the vertical center line of the carrier (11).

7. The internal expansion clamping mechanism for bicycle assembly according to claim 6, characterized in that: The bottom end of the rotating column (13) is rotatably connected to a chassis (14), and an arc-shaped notch (15) for mounting and fixing the chassis (14) is provided on the outer side of the chassis (14), and the arc-shaped notches (15) are evenly distributed in a ring shape about the central axis of the chassis (14).

8. The internal expansion clamping mechanism for bicycle assembly according to claim 4, characterized in that: Handles (17) are fixedly connected to both sides of the outer wall of the carrier (11), and the handles (17) are symmetrical about the vertical center line of the carrier (11).

Images