CN201296138Y - Wheel hub - Google Patents

Abstract

The utility model relates to a wheel hub installs on the bicycle, and includes: mandrel, hub body, ratchet, clutch and driving ring, and the side of hub body has the joint portion inside. The ratchet wheel is arranged beside the hub body and comprises a chain wheel and a polygonal convex block, the chain wheel is arranged on one side of the ratchet wheel, and the polygonal convex block is arranged on the other side of the ratchet wheel. Clutch includes roller, clutch ring and annular spring, and the roller supports and leans on the outside of polygon lug, and clutch ring encloses round polygon lug and has seted up a plurality of breachs, and the roller is located the breach, and annular spring registrates and restricts the roller on clutch ring, and the driving ring surrounds clutch and combines on the joint portion. When the roller is located at the center of the outer edge of the polygonal bump, the roller is separated from the transmission ring, and when the roller is far away from the center of the polygonal bump, the roller is abutted against the transmission ring.

Description

hub

technical field

The utility model relates to a bicycle, in particular to a performance bicycle.

Background technique

In the 1970s, a bicycle motocross movement emerged in the United States, and the bicycles used for this movement were called BMX bicycles. The models of BMX bicycles are relatively small, the tires are relatively thick, and the venue of the competition is very similar to that used by off-road motorcycles. This sport quickly became popular among young people. However, in the mid-1980s, most young people were deeply influenced by skateboard culture and felt that it was too simple to compete only in the venue. With the pedals installed, players can use these pedals to make many new tricks. As a result, people began to take BMX bicycles to flat ground and skateboarding venues to play, and they played more tricks than skateboards, jumped higher, and were more exciting, and the name of this type of bicycle changed from BMX bicycle to BMX freestyle bike.

Please refer to Fig. 1, which shows a BMX freestyle bicycle on the market. This bicycle 10 comprises a vehicle frame 11, a rear wheel 14, a front wheel 14' and a transmission system 15, wherein the front wheel 14' and the rear wheel 14 are respectively assembled on the front suspension frame 12 and the rear suspension frame 13 of the vehicle frame 11 . The transmission system 15 includes a pedal 16, a first sprocket 17, a chain 18 and a hub 100. The user drives the first sprocket 17 to rotate by stepping on the pedal 16, and the rotation of the first sprocket 17 drives the chain 18. rotation, and the rotation of the chain 18 allows the hub body 120 to drive the rear wheel 14 to rotate, so that the bicycle 10 is pushed forward. In addition, the pedal 19 and the pedal 19' are respectively sleeved on the rear wheel 14 and the front wheel 14' for the user to perform tricks.

FIG. 2 shows a wheel hub for a BMX freestyle bicycle. The wheel hub 100 is mainly composed of a spindle 110 , a hub body 120 , a ratchet 130 , an inner gear ring 140 and a plurality of bearings 150 . The hub body 120 and the ratchet 130 are sheathed on the spindle 110 , and both the hub body 120 and the ratchet 130 are in rolling connection with the spindle 110 through the bearing 150 . Next, please refer to FIG. 2 and FIG. 3 at the same time. FIG. 3 shows a side view of the ratchet and the inner gear ring. The ratchet 130 includes a second sprocket 132, a plurality of ratchets 134 and a spring 136. The ratchets 134 are mounted on the ratchet grooves 138 of the ratchet 130 at equal intervals, for example, in a circular manner, and the springs 136 are used to perform fixed. In addition, please refer to FIG. 4 , which is a perspective view of the hub body and the inner gear ring. The inner gear ring 140 is provided with a first right-handed thread 142, and the inner surface of the hub body 120 is provided with a second right-handed thread 122, and the first right-handed thread 142 and the second right-handed thread 122 fit each other for smooth The inner gear ring 140 is screwed in clockwise, so that the inner gear ring 140 can be fixed in the hub body 120 .

As can be seen from Figures 3 and 4, when the chain 18 (as shown in Figure 1) pulls the second sprocket 132 (as shown in Figure 2) to rotate clockwise, it will drive the ratchet wheel 130 to rotate, and at this time the pawl 134 will be in contact with the internal teeth The inner teeth 144 of the ring 140 are engaged with each other to make the inner gear ring 140 rotate. When the inner gear ring 140 rotates, the hub body 120 will also be rotated to make the bicycle 10 move forward. When the chain 18 pulls the second sprocket 132 to rotate counterclockwise, the pawl 134 on the ratchet 130 will slide smoothly over the internal teeth 144 of the internal gear ring 140, and the hub body 120 will not be driven at this time. The so-called "idling".

Sometimes, when a performer performs on the bicycle 10, the bicycle 10 is allowed to stand upright, the front wheel 14' is contacted with the ground and the rear wheel 14 is independently idling. Please refer to FIG. 3 , when the rear wheel 14 is idling forward, the inner teeth 144 of the inner gear ring 140 will smoothly pass through the pawl 134 , and when the rear wheel 14 is idling backward, the inner teeth 144 of the inner gear ring 140 will be in contact with The ratchets 134 are engaged with each other to drive the ratchet 130 to rotate backwards, and the ratchet 130 will pull the chain 18 to allow the second sprocket 132 to drive the pedal 16 to rotate. However, the rotation of the pedal 16 may injure the performer.

Therefore, how to prevent the pedals 16 from being driven when the rear wheels 14 are idling backwards is worthy of consideration by those skilled in the art.

Contents of the invention

The main purpose of the utility model is to provide a wheel hub, which can prevent the pedal from being driven when the rear wheel is idling backward.

For realizing above-mentioned object, the technical scheme that the utility model adopts is:

A wheel hub installed on a bicycle, characterized in that the wheel hub includes:

a mandrel;

The hub body is sleeved on the mandrel, and the side of the hub body has a joint inside;

A ratchet, sleeved on the mandrel and located beside the hub body, the ratchet includes: at least one sprocket and a polygonal projection, wherein: the sprocket is arranged on the ratchet One side of the said polygonal bump is set on the other side of said ratchet;

A clutch device, sleeved on the mandrel, the clutch device includes: a plurality of rollers, a clutch ring and a ring spring, wherein: the plurality of rollers against the On the outer edge of the polygonal bump, each roller corresponds to one of the outer edges of the polygonal bump; the clutch ring surrounds the polygonal bump of the ratchet wheel, and there are multiple rollers on the clutch ring. a gap, the above-mentioned rollers are located in the gap, and each roller corresponds to one of the gaps; the ring spring fits on the clutch ring and binds the rollers;

A transmission ring, surrounding the clutch device, the transmission ring is combined on the joint part of the hub body; wherein, when the above-mentioned roller is located at the center of the outer edge of the polygonal protrusion, There is a distance between the roller and the transmission ring, and when the roller is away from the center of the polygonal protrusion, the roller abuts against the transmission ring.

In the above-mentioned hub, the outer surface of the transmission ring is provided with a plurality of protrusions, and the joint part of the hub body is formed of a plurality of grooves, and these protrusions are combined on these grooves.

In the above-mentioned hub, a plurality of blocking blocks are provided on the clutch ring, and these blocking blocks are arranged on the inner side of the clutch ring. The outer edge of the polygonal bump interferes with the blocking block.

In the above-mentioned hub, a sleeve is further included, and the sleeve is in a tight fit with the mandrel, and the clutch ring is in a loose fit with the sleeve.

In the above-mentioned hub, an O-ring is further included, and a first O-shaped groove is arranged on its central axis, and the O-ring is sleeved on the first O-shaped groove, and the inner edge of the clutch ring is provided with a A second O-shaped groove, the second O-shaped groove presses against the O-shaped ring.

In the above wheel hub, a ring-shaped convex rib is arranged on the spindle, and the clutch ring is loosely fitted with the convex rib. Wherein, a first O-shaped groove is provided on the convex rib, the O-ring is set on the first O-shaped groove, and the inner edge of the clutch ring is provided with a second O-shaped groove, and the second O-shaped groove is Press against the O-ring.

Compared with the prior art, the utility model adopting the above-mentioned technical solution has the advantage that: since there is a distance between the roller and the transmission ring when the roller is located at the center of the outer edge of the polygonal bump, when the rear of the bicycle When the wheels are idling (whether it is idling forward or backward), the rotating transmission ring does not have any contact with the clutch device. Therefore, when the rear wheel is idling, the polygonal bump will not rotate, so it will not drive the pedal to rotate. That way, when the performer is doing rear wheel spin on the bike, they won't be hurt by the pedals.

Description of drawings

Fig. 1 is a schematic diagram of a BMX freestyle bicycle on the market;

Fig. 2 is a schematic diagram of a wheel hub for a BMX freestyle bicycle;

Fig. 3 is the side view of ratchet and internal gear ring;

Fig. 4 is a perspective view of the hub body and the inner gear ring;

Fig. 5 is a sectional view of the hub of the first embodiment of the present utility model;

Figure 6 is an exploded view of the hub of the first embodiment;

Fig. 7A is a positional relationship diagram of polygonal bumps, rollers, clutch rings and transmission rings;

Fig. 7B is a positional diagram of the polygonal bump, the roller, the clutch ring and the transmission ring when the polygonal bump rotates clockwise;

Fig. 8 is the bicycle using the wheel hub of the present utility model;

Fig. 9 is a sectional view of the hub of the first embodiment of the present utility model;

Fig. 10 is an exploded view of the hub of the first embodiment.

Description of reference signs: 10, 10'-bicycle; 11-vehicle frame; 12-front suspension frame; 13-rear suspension frame; 14-rear wheel; 14'-front wheel; 15-transmission system; 16-pedal 17-first sprocket wheel; 18-chain; 100-wheel hub; 110-mandrel; 120-hub body; 122-second right-hand thread; 130-ratchet wheel; 136-spring; 140-internal gear ring; 142-first right-hand thread; 144-internal tooth; 150-bearing; 200-hub; 210-mandrel; 220-hub body; ; 230-ratchet; 232-sprocket; 234-polygon bump; 234a-outside; -Second O-shaped groove; 252c-resistance block; 253-ring spring; 261～264-bearing; 261a-outer surface; 261b-inner surface; 265-sleeve; Type ring; D-distance; 300-hub; 310-mandrel; 312-rib; 312a-first O-shaped groove; 361-364-ball group.

Detailed ways

Please refer to FIG. 5 and FIG. 6 , FIG. 5 is a cross-sectional view of the hub of the first embodiment of the present invention, and FIG. 6 is an exploded view of the hub of the first embodiment. Please refer to FIG. 5 and FIG. 6 at the same time, the hub 200 includes a spindle 210, a hub body 220, a ratchet 230, a clutch device 250 and a transmission ring 240, wherein the hub body 220 is sleeved on the spindle 210, and the hub body 220 There is a joint portion 222 inside the side of the body, and the joint portion 222 is formed by a plurality of grooves 222a. In addition, the ratchet 230 is also sleeved on the spindle 210 and is located beside the hub body 220. The ratchet 230 includes a sprocket 232 and a polygonal protrusion 234, wherein the sprocket 232 is disposed on one side of the ratchet 230, and the polygonal protrusion 234 Then it is located on the other side of the ratchet 232 . In addition, the clutch device 250 includes: a plurality of rollers 251, a clutch ring 252 and a ring spring 253, the ring spring 253 fits on the clutch ring 252 and binds the rollers 251, and the clutch ring 252 is provided with multiple There are three notches 252a, and the rollers 251 are located in these notches 252a, and each roller 251 corresponds to one of the notches 252a.

In addition, the transmission ring 240 surrounds the clutch device 250 , and the transmission ring 240 is combined with the joint portion 222 of the hub body 220 . In this embodiment, the outer surface of the transmission ring 240 is provided with a plurality of protrusions 240a, and these protrusions 240a are assembled on the grooves 222a of the joint part 222, and the protrusions 240a and the grooves 222a are tightly fitted. Moreover, the hub 200 also includes a plurality of bearings 261 - 264 , and these bearings 261 - 264 are fitted on the spindle 210 . With these bearings 261 - 264 , the hub body 220 and the ratchet 230 can rotate relative to the spindle 210 . As can be seen from FIG. 5 , the bearing 261 and the bearing 262 are disposed between the ratchet 230 and the spindle 210 , wherein the outer surface 261 a of the bearing 261 abuts against the polygonal projection 234 , and the inner surface 261 b of the bearing 261 abuts against the spindle 210 .

Moreover, the above-mentioned hub 200 further includes a sleeve 265 and an O-ring 266 , and the sleeve 265 fits on the spindle 210 and is in tight fit with the spindle 210 . The sleeve 265 is provided with a first O-shaped groove 265a, and the O-ring 266 is sleeved on the first O-shaped groove 265a. It is a loose fit, so the clutch ring 252 can rotate relative to the sleeve 265 . Moreover, a second O-shaped groove 252b is disposed on the inner edge of the clutch ring 252, and the second O-shaped groove 252b is pressed against the O-ring 266, and the O-ring 266 can prevent the clutch ring 252 from lateral displacement.

Please refer to FIG. 6 and FIG. 7A at the same time. FIG. 7A is a positional relationship diagram of the polygonal protrusion, the roller, the clutch ring and the transmission ring. Due to the restraint of the ring spring 253 , the roller 251 abuts against the outer edge 234 a of the polygonal protrusion 234 . In this embodiment, the number of rollers 251 is six, the polygonal protrusion 234 has six outer sides 234a, and each outer side 234a corresponds to a roller 251 . Moreover, when the roller 251 is located at the center of the outer edge 234 a of the polygonal protrusion 234 , there is a distance D between the roller 251 and the transmission ring 240 .

Next, please refer to FIG. 5 and FIG. 7B . FIG. 7B is a positional relationship diagram of the polygonal protrusion, the roller, the clutch ring and the transmission ring after the polygonal protrusion rotates clockwise. When the chain pulls the ratchet 230 to make the polygonal projection 234 rotate forward, the roller 251 will be pushed outward by the outer edge 234 a, so that the roller 251 abuts against the transmission ring 240 . At this time, if the polygonal protrusion 234 continues to rotate forward, the polygonal protrusion 234 will transmit a thrust force on the transmission ring 240 by means of the roller 251, so that the transmission ring 240 starts to rotate. Moreover, the rotation of the drive ring 240 will drive the hub body 220 to rotate, and the hub body 220 will drive the rear wheel 14 (as shown in Figure 8 ) of the bicycle 10' to rotate, and allow the entire bicycle 10' to move forward.

Please compare Fig. 1 with Fig. 8, Fig. 8 shows a bicycle using the wheel hub of the present invention. In the bicycle 10' of Fig. 8, except the hub 200, all the other elements are the same as the bicycle 10 in Fig. 1, so the same symbols are used.

Please refer to Fig. 7A and Fig. 8 at the same time, because when the roller 251 is located at the center of the outer edge 234a of the polygonal protrusion 234, there is a distance D between the roller 251 and the transmission ring 240, so when the rear wheel 14 of the bicycle 10' spins idly When (no matter forward idling or backward idling), the rotating transmission ring 240 will not have any contact with the clutch device 250. Therefore, when the rear wheel 14 is idling, the polygonal projection 234 will not rotate, so the pedal 16 will not be driven to rotate. In this way, when the performer performs the performance of the rear wheel 14 idling on the bicycle 10, he will not be injured by the pedal 16.

Please continue to refer to FIG. 7A , the clutch ring 252 is provided with a plurality of blocking blocks 252c (two in this embodiment), and these blocking blocks 252c are arranged inside the clutch ring 252 . When the polygonal protrusion 234 rotates backward, the roller 251 will also push outward, but the roller 251 has not abutted against the front of the transmission ring 240, the outer edge 234a of the polygonal protrusion 234 will interfere with the blocking block 252c, and The polygonal protrusion 234 will drive the clutch ring 252 and the roller 251 to rotate backward. Since the roller 251 is not abutted against the transmission ring 240, when the performer pushes the pedal 16 to rotate the ratchet 230 backward, the rear wheel 140 will not be driven to rotate backward.

In the above-mentioned first embodiment, the hub body 220 and the ratchet 230 can rotate relative to the spindle 210 by means of these bearings 261-265, but those skilled in the art can use other ways to make the hub body 220 and the ratchet 230 Rotation is performed relative to the spindle 210 . Please refer to FIG. 9 and FIG. 10 , FIG. 9 is a cross-sectional view of the hub of the first embodiment of the present invention, and FIG. 10 is an exploded view of the hub of the first embodiment. In the second embodiment, the same elements as those in the first embodiment will be marked with the same reference numerals and will not be described again.

Please compare the hub 300 of the second embodiment with the hub 200 of the first embodiment. In the hub 200, the hub body 220 and the ratchet 230 can be relative to the spindle 210 by means of the bearing 261, the bearing 262, the bearing 263 and the bearing 264. Make a turn. However, in the hub 300, the hub body 220 and the ratchet wheel 230 can rotate relative to the spindle 310 by means of the ball set 361, the ball set 362, the ball set 363 and the ball set 364, and the ball sets 361-364 are made of Multiple balls are connected in series. Wherein, a ring-shaped convex rib 312 is disposed on the mandrel 310 , and the clutch ring 252 fits on the convex rib 312 , and the clutch ring 252 and the convex rib 312 are in a loose fit. In addition, the convex rib 312 is provided with a first O-shaped groove 312a, and the O-ring 266 is sleeved on the first O-shaped groove 312a, and the second O-shaped groove 252b on the inner edge of the clutch ring 252 is pressed against the O-shaped groove. O-ring 266, this O-ring 266 can prevent the lateral displacement of the clutch ring 252.

The above description is only illustrative, rather than restrictive, of the present utility model. Those of ordinary skill in the art understand that many modifications, changes or equivalents can be made without departing from the spirit and scope defined in the claims. But all will fall within the protection scope of the present utility model.

Claims (7)

1. a wheel hub is installed on the bicycle, it is characterized in that, described wheel hub comprises:

One axle;

One hub body is set on the described axle, and the side inside of described hub body has a joint portion;

One ratchet, be set on the described axle and be positioned at by the described hub body, described ratchet comprises: an at least one sprocket wheel and a polygon projection, and wherein: described sprocket wheel is located at a wherein side of described ratchet, and described polygon projection is located at an other side of described ratchet;

One arrangement of clutch, be set on the described axle, described arrangement of clutch comprises: a plurality of rollers, a clutch ring and a ring-spring, and wherein: described a plurality of rollers are resisted against on the outside of described polygon projection, and each roller corresponds to a wherein outside of described polygon projection; Described clutch ring offers a plurality of breach round the polygon projection of described ratchet on described clutch ring, above-mentioned roller is to be positioned at described breach, and each roller corresponds to a wherein breach; Described ring-spring is linked on the described clutch ring and is fettering described roller;

One transmission ring, round described arrangement of clutch, described transmission ring is combined on the joint portion of described hub body; Wherein, when above-mentioned roller is positioned at the centre of outside of described polygon projection, have a distance between described roller and described transmission ring, and when above-mentioned roller during away from the centre of described polygon projection, described roller butt described transmission ring.

2. wheel hub according to claim 1 is characterized in that: the outside face of described transmission ring is provided with a plurality of projections, and the joint portion of hub body is made of a plurality of groove, and described group of bumps is combined on the described groove.

3. wheel hub according to claim 1, it is characterized in that: on described clutch ring, be provided with a plurality of stop blocks, these stop blocks are arranged on the inboard of clutch ring, when described polygon projection rotates backward and before described roller does not abut to described transmission ring as yet, the outside of described polygon projection can with described stop block interference.

4. wheel hub according to claim 1 is characterized in that: further comprise a sleeve pipe, described sleeve pipe and described axle are flush fit, and described clutch ring and described sleeve pipe are easy fit.

5. wheel hub according to claim 4, it is characterized in that: further comprise an O type ring, described axle is provided with one the one O type groove, described O type ring set is located on the described O type groove, and the inner edge of described clutch ring then is provided with one the 2nd O type groove, and described the 2nd O type groove is compressing described O type ring.

6. wheel hub according to claim 1 is characterized in that: described axle is provided with a fin of ring-type, and described clutch ring and described fin are easy fit.

7. wheel hub according to claim 6, it is characterized in that: described fin is provided with one the one O type groove, described O type ring set is located on the described O type groove, and the inner edge of described clutch ring then is provided with one the 2nd O type groove, and described the 2nd O type groove is compressing described O type ring.

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