Safety flywheel transmission connection structure of venue performance car

Abstract

The utility model relates to a safety flywheel transmission connection structure of a venue performance car, which aims at solving the problems that the performance car does not use a movable flywheel and the transmission connection structure needs to be reinforced due to the special effect performance purpose, and comprises a hub, a main shaft and a transmission bearing, transmission bearings are embedded into the two ends of the hub and are arranged on the main shaft in a sleeving manner; the transmission bearing is axially fixed through the first fixing nut and the second fixing nut; threads are circumferentially arranged at one end of the hub; racks are arranged on the circumference between the spoke perforated plate surface and the threads of the hub; the transmission gear is mounted on the hub through a through hole, and an inner gear is arranged in the through hole and matched with a rack of the hub; a locking ring is arranged on the threads of the hub, the locking ring is matched with the hub, the locking ring abuts against the transmission teeth, and three safety grooves are formed in the outer circle of the locking ring.

Description

Technical Field

[0001] The utility model relates to the technical field of bicycle parts, in particular to a safety flywheel transmission connection structure for a field performance vehicle. Background Art

[0002] A bicycle, also known as a cycle or bicycle, is typically a small, two-wheeled land vehicle. Riders pedal and are a green and environmentally friendly means of transportation. However, with the development of society, bicycles have become more than just a means of transportation; they have gradually become a tool used by young people to perform street stunts. These bicycles, specifically designed for stunts, place extremely high demands on material strength, welding, and other aspects. For example, BMX (Bicycle Motocross) is an extreme sport, named for its thicker tires and the fact that the race tracks resemble those used for off-road motorcycles. Traditional BMX flywheels are secured to the hub using threads. Because BMX flywheels lack an internal ratchet mechanism, the force transmitted from the chain to the rear wheel acts directly on the connection point between the teeth and the hub. This threaded fastening method can cause thread stripping over time. Summary of the Invention

[0003] The utility model is a safe flywheel transmission connection structure for a performance vehicle designed for a field performance vehicle, in view of the fact that a live flywheel is usually not used for a performance vehicle and a transmission connection structure needs to be strengthened due to its stunt performance purpose.

[0004] This utility model provides a safe flywheel transmission connection structure for a performance bicycle. The flywheel transmission connection structure comprises a hub, a main shaft, and a transmission bearing. The hub and main shaft are connected and used in a similar manner to a conventional bicycle. The main shaft is connected to the bicycle frame, and the hub has perforations for spokes, which are rotationally symmetrically arranged on the spoke perforation plate formed integrally with the hub.

[0005] Transmission bearings are embedded in both ends of the hub, and the transmission bearings are sleeved on the main shaft;

[0006] The transmission bearing is axially fixed by a first fixing nut and a second fixing nut;

[0007] A thread is provided circumferentially on one end of the hub; a rack is provided on the circumference between the spoke perforated plate surface of the hub and the thread;

[0008] The transmission gear is mounted on the hub through a through hole, wherein an internal tooth is provided in the through hole and cooperates with the rack of the hub;

[0009] A locking ring is provided on the hub thread, the locking ring cooperates with the hub, the locking ring abuts against the transmission teeth, and the outer ring of the locking ring is provided with 3 safety grooves.

[0010] The use of the safety groove includes: installing the claw piece between the transmission tooth and the locking ring, and installing it in the form of transmission tooth, claw piece, and locking ring. After installation, the bend on the claw piece is folded into the safety groove of the locking ring, which can effectively reduce the possibility of the locking ring loosening.

[0011] Preferably, the transmission teeth are made by stamping, the outer teeth of the transmission teeth are of 14T specification, the original through holes inside are threaded holes, while in this application the inner holes are toothed holes.

[0012] The internal tooth angle of the traditional tooth is 100°, the depth of the internal tooth is 1 cm, and the number of internal teeth is 40; the internal teeth are rotationally symmetrical about the axis.

[0013] Preferably, the radial cross-section of the hub is used as a reference surface; the inner hole of the hub is symmetrical about the midpoint, including three parts: the left part of the inner hole of the hub, the middle part of the inner hole of the hub, and the right part of the inner hole of the hub; the width of the left part of the inner hole of the hub is equal to the horizontal distance between the left end point of the hub and the inner side surface of the left spoke perforated plate of the hub;

[0014] The connection between the left part of the hub inner hole and the middle part of the hub inner hole is chamfered.

[0015] The left end of the hub is provided with an external thread, and an end protection cover is installed thereon.

[0016] The beneficial effects of this utility model are that the use of a tooth structure instead of a thread structure not only facilitates installation but also helps strengthen the connection relationship. In addition, the internal cavity structure is adjusted according to the bearing installation area based on the adjustment of the hub structure, thereby enhancing the strength of the ring structure inside the spoke perforated plate surface of the hub. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 The hub and spindle structure diagram of the utility model;

[0018] Figure 2 A plan view of the transmission gear of the present utility model;

[0019] Figure 3 A cross-sectional view of the transmission teeth of the present utility model;

[0020] Figure 4 A plan view of the right end of the hub of the present invention;

[0021] Figure 5 A plan view of the locking ring of the utility model;

[0022] Figure 6 An assembly drawing of the utility model;

[0023] In the figure: 1. Hub, 2. Spoke perforated plate, 3. Rack, 4. Thread, 5. First fixing nut, 6. Second fixing nut, 7. Drive bearing, 8. External thread, 9. Locking ring, 10. Drive teeth, 11. Internal teeth. DETAILED DESCRIPTION

[0024] The technical solution of the present invention will be further described below with reference to specific embodiments and in conjunction with the accompanying drawings. Example

[0025] like Figures 1 to 6 The illustrated safety flywheel transmission connection structure for a performance bicycle comprises a hub 1, a spindle, and a transmission bearing. The hub and spindle are connected and used in a manner similar to that of a conventional bicycle. The spindle is connected to the bicycle frame, and the hub has perforations for spokes, which are rotationally symmetrically arranged on a spoke perforation plate integrally formed on the hub.

[0026] Transmission bearings are embedded at both ends of the hub, and the transmission bearings are sleeved on the main shaft; the transmission bearings are axially fixed by the first fixing nut 5 and the second fixing nut 6; there is a pair of first fixing nuts 5 and second fixing nuts 6 at each end of the main shaft, which are used to axially fix the transmission bearing 7.

[0027] The radial section of the hub is used as a reference surface; a thread 4 is provided circumferentially on one end of the hub; a rack 3 is provided on the circumference between the spoke perforated plate surface 2 of the hub and the thread;

[0028] The transmission gear 10 is mounted on the hub through a through hole, and an internal tooth is provided in the through hole, and the internal tooth cooperates with the rack of the hub;

[0029] A locking ring is provided on the hub thread, the locking ring cooperates with the hub, the locking ring abuts against the transmission teeth, and the outer ring of the locking ring 9 is provided with three safety grooves.

[0030] The left end of the hub is provided with an external thread 8, and an end protection cover is mounted thereon.

[0031] The use of the safety groove includes: installing the claw piece between the transmission tooth and the locking ring, and installing it in the form of transmission tooth, claw piece, and locking ring. After installation, the bend on the claw piece is folded into the safety groove of the locking ring, which can effectively reduce the possibility of the locking ring loosening.

[0032] The transmission teeth are made by stamping, the outer teeth of the transmission teeth are 14T specifications, the original through holes inside are threaded holes, and in this application the inside is a toothed hole.

[0033] The internal tooth angle of the conventional tooth is 100°, the depth of the internal tooth 11 is 1 cm, and the number of internal teeth is 40; wherein the internal teeth are rotationally symmetrical about the axis.

[0034] The radial cross-section of the hub is used as the reference surface; the hub inner hole is symmetrical about the midpoint, including the left, middle, and right parts of the hub inner hole; the width of the left part of the hub inner hole is equal to the horizontal distance from the left end point of the hub to the inner side of the left spoke perforation plate of the hub;

[0035] The connection between the left part of the hub inner hole and the middle part of the hub inner hole is chamfered.

[0036] The above description of the disclosed embodiments is intended to enable one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not limited to the embodiments shown herein but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A safety flywheel transmission connection structure for a field performance vehicle, characterized in that: include: Hub, spindle, transmission bearing; both ends of the hub are embedded with transmission bearings, and the transmission bearings are sleeved on the spindle; The transmission bearing is axially fixed by a first fixing nut and a second fixing nut; A thread is provided circumferentially on one end of the hub; a rack is provided on the circumference between the spoke perforated plate surface of the hub and the thread; The transmission gear is mounted on the hub through a through hole, wherein an internal tooth is provided in the through hole and cooperates with the rack of the hub; A locking ring is provided on the hub thread, the locking ring cooperates with the hub, the locking ring abuts against the transmission teeth, and the outer ring of the locking ring is provided with 3 safety grooves.

2. A safety flywheel transmission connection structure for a field performance vehicle according to claim 1, characterized in that: The transmission teeth are made by stamping. The internal tooth angle of the traditional teeth is 100°, the depth of the internal teeth is 1cm, and the number of internal teeth is 40. The inner teeth are rotationally symmetrical about the axis.

3. The safety flywheel transmission connection structure for a field performance vehicle according to claim 1, characterized in that: The radial cross-section of the hub is used as the reference surface; the hub inner hole is symmetrical about the midpoint, including the left, middle, and right parts of the hub inner hole; the width of the left part of the hub inner hole is equal to the horizontal distance from the left end point of the hub to the inner side of the left spoke perforation plate of the hub; The connection between the left part of the hub inner hole and the middle part of the hub inner hole is chamfered.

4. A safety flywheel transmission connection structure for a field performance vehicle according to claim 3, characterized in that: The left end of the hub is provided with an external thread, and an end protection cover is installed thereon.

Images