JPS58501672A - transmission - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] transmission The present invention particularly relates to a transmission having a variable sprocket for use in bicycles.

Today, the ten-speed rotary wheel transmission has two front sprockets and five sprockets. [The chain wrapped around the rear cluster including r, the front chain changing device and and a rear chain changing device. These chain changing devices are designed for two riders. By moving two control levers, the chain can be moved from one sprocket to another. The hook on the sprocket does a commendable job. The chain changing device has many sophisticated parts. , which frequently requires repair and is easily damaged. The chain changing device Also, it is difficult to operate, makes continuous noise, and some gears are damaged due to chain misalignment. This may result in disability, and often requires the rider to see it visually, requiring the rider's attention. It will divert you from the road. For these reasons, several attempts have been made in the past to Some of these devices are based on variable sprockets. the Examples of attempts are U.S. Pat. Found in the detailed description. There are several reasons why such devices have not been commercially successful on a large scale. Its complexity, high cost, added weight and repair problems. Another example is No. 453.712, where the two flanges are cantilevered. Stacked with planetary gears oriented laterally in bar position.

Such structures contain severe stresses under working loads and thereby In particular, the flange must be removed and replaced, so the variable sprocket may be damaged. The result is that it becomes severely deformed and loses most of its structural integrity.

These deformations disrupt sprocket-segment-planet gear and chain synchronization. harm In contrast, the present invention overcomes these and other problems and It provides a simple and durable device that can be economically mass-produced from plastic. Ru.

In other words, the present invention includes an axle, a drive flange provided on the axle, and a drive flange provided on the axle. An index that is rotatably dazzled on the opposite side of the lunge and has a number of zigzag cams. A flange and two sprocket-segment-players fitted between the flanges. a star gear and at least two idler planet gears; the sprocket segment-planet; b3 A connecting means for transmitting tangential force between the wheel and the drive flange, and a connecting means attached to the planetary gear. a cam follower attached to and joined to and associated with the helical wavy cam; The helical wave cam includes a series of alternating asperities extending from the planetary gear along the helical cam. When sliding, move the planetary gear closer to the pickup truck 61 and away from it. This is a transmission device with a variable sprocket that moves in the same direction. be.

FIG. 1 is a side view of a bicycle equipped with a variable sprocket according to the present invention.

Figure 2 shows the bicycle and variable sprocket as seen by the arrow 2-2 in Figure 1. The sprocket itself is cut along 2'-2'k marked in Figure 6. and make sure to show the idler planetary gears along with the sprocket-segment-planetary gears. be.

FIG. 3 is a partially cutaway pressure surface view of the variable sprocket.

Figure 4 shows three of the six fixing means? Front view of removed variable segment - planetary gear , 并] A front view, a side view, and a rear view.

Figure 11 (ζ Sprocket-seg seen along the 11-11 cross-section line marked in Figure 6) Figure 2 shows a cross-section through the area of the variable sprocket including the interplanetary wheel.

These attached drawings show the frame 50 with the seat post member 55 and the bolt 14. 1 shows a bicycle (see FIG. 1) with pedals 12 fixed to the axle 13. . mF[1113 is installed in the frame at the rotation point by the ball bearing 15. ing. Wheels 16 are also rotatably mounted on frame 50 in a known manner.

The bicycle has a variable sprocket 20 which is sprocketed by a roller chain 732. 17 is connected to the shifter, and the sprocket 17 is connected via the one-way clutch 1B using a known method. The vehicle is equipped with a transmission connected to the wheels 16. Variable sprocket 20 is car-1 3 and 1 drive flange 2 with a square hole 27 evenly fitted on the square portion 13' of the axle 13; 1 and inserted between turns 21 and 25 on the circular part of the axle 13 on the opposite side of the drive flange 21. Two striped rocket-segment planetary gears 29 and at least two 9 and a planetary gear 31 (with no planetary gear inserted, on one of their sides). (compared to configurations where the flange is cantilevered, thus causing stress and deformation on the flange) a gear forming a relatively rigid structure, the gear being tangentially connected to the drive flange 21; connection means in the form of an elongated key 34 and each keyway 24 connected in the direction; and are connected to the planetary gears 29 and 31 and engaged with their respective helical wave cams 26. and a cam follower 37 according thereto, the helical wave cam moves the planetary gear. The cam follower 37 includes a series of recesses 35 and protrusions 36 such that the planetary gear When sliding along the wave-like cam 26, it engages with the helical wave-like cam 26 and moves near and far from the axle 13. I try to maintain a relationship (see figures 2, 6, and 4).

A fixing means 47 formed at the end of the cam follower 37 extends along the outer surface of the indexing flange 25. It slides. Under an operating load that causes slight deformation of the index flange 25. , the fixing means 47 is joined to the outer surface of the indexing flange 25, and the planet gears 29 and 31 are connected to the outer surface of the indexing flange 25. (due to the boss-like form of the fixing means 47, the indexing flap (can be assembled with the engine 25). Sprocket-segment-planetary gear 29 prevents separation of the outer surface of the drive flange 21. Suzorokenote Segment - Yusei Zonguruma The reason for biasing these additional fixing means 44 only at 29 is because of the sprocket segments. The planetary gears 29 carry tangential forces that tend to twist them around the key 34. This is a problem that does not occur with the idle planetary gear 31.

, and while the planetary gear is not secured to the chain 32, a troublesome situation occurs. Avoid sagging. Chain 32 (see Figure 4) is a variable sprocket 20, sprocket-segment-planetary gear 29 (The leading gear 30' is partially removed and the transmission (to avoid contact with the chain 32 when the conductor is changed to high efficiency).

The chain 32 is made from links, and the pitch length is the length of the chain 32. is equal to divided by the number of links contained in . The conventional rotating wheel roller chain Although it is considered to be a preferable chain from an economic point of view, the chain used here The term refers to other chains and toothed belts that can be used to assemble this device. This includes: When you step on the pedals of your bicycle, a tension occurs in the chain 32. This causes the planetary gear to have a tangential shape n1 spherical locket segment - planetary gear 29 The key is transmitted to the key 34 formed on each side of the radial keyway 24. engages and slides therein and transmits to the negative mf drive sprocket 21 of and f et al. blood The radial loads appearing on the interplanetary wheels 29 and 31 around which the lane 32 wraps The helical waveform is transmitted through cam follower wheels 37 provided on both sides of the planetary gears 29 and 31. The information is transmitted to the system 26. The radial load pushes the planetary gears 29 and 31 into the recess 35 and Fix one. A chain 32 wrapped around a helical wave variable force sprocket 20 When engaged (see Figure 4), between the sprocket, the segment and the planet wheel 29. The length of the hanging chain is positioned and spaced so that there is no excessive slack. .

If the individual helical wavy cams 26 are improperly spaced, the length of this hanging chain will increase. or sprocket-segment-planetary gear 29. This prevents proper operation of the variable sprocket 20 in either case.

The integrally molded brake 38 (see Fig. 6) is fixed to the frame member 55 with screws 46. The arm 39 is pivotably supported on the stem 40. Arm 39 is a crimp sword [ The cable 41 attached to one of the arms 39 through the ferrule 54 1j1i'' is compressed between the jackets 42 to create a frictional force on the index flange. and brake. At the other end, cable 41 and its jacket, 421 Connected to the hand lever assembly 43, the operator pushes it down and releases the cable. The brake 38i is (The index flange 25 can be moved by 7 degrees, and the drive flange 21 can be When the pedal rotates back and forth through the 12-year old, the keyway 24 and the spiral cam 260 intersect. is wide and connects with the planetary gears 29 and 31 to each other to increase the transmission force and reduce the transmission force, respectively. (low ratio means that the wheel 16 rotates every revolution of the variable sprocket 20). (This is the ratio at which the motor rotates at a lower number of revolutions.)

Spiral wave cam, 26, sprocket-segment-planetary gear 29 on axle 13 The striped rocket-segment-planetary gear 29 remains in a nearly symmetrical position with respect to the It is configured such that an imaginary line drawn through it passes through the axle 13. Therefore, at least One Suzoro Katto segment - the planetary sono wheel 29 is constantly engaged with the chain 32. , maintains power transmission between sprockets 17 and 20, with only one sprocket running most of the time. Proket-segment-planetary gear 29 engages to make the transmission highly efficient. (sprocket-segment-interplanetary wheel 29 are clustered together) Then, during the 200 rotations of the variable sprocket, approximately half of the locking sprocket 20 is rotated at the fixed point. None engages with the chain 32 that wraps only the portion).

Therefore, when the variable sprocket rotates, the chain 32 moves from one sprocket to the other. Segments - alternately joined with planetary gears 29 or others, both for short transition overlaps sprocket-segment-planet gear 29 engages. Sprocket - Segment In order to make the transition between the engine and the planetary gears 29 as smooth as possible, most of the power is It is desirable to accomplish this while the signal is not being transmitted to pin 32. *6 row + i sprocket - segment - occurs when the planet wheel 29 is in its top/low position, and The rider pedals harder than usual when the pedal is in its top/bottom position. , the pedal 12 and the sprocket-segment-planetary gear 29 along the same imaginary line. Composition is synchronizing the two and making them match.

Each of the planet gears 29 and 31 has its own key that controls the position of the individual planet gear. - engages the groove 24 and the individual helical wave cams 26; Therefore, all planetary gears 29 and 31 at the same distance from the axle 13, or a pair of planetary gears 29 from the vehicle axle 13. Furthermore, it is up to the design to draw the imaginary ellipse through the planetary gears 29 and 31. It is the person's choice. The shape of this planetary gear is based on a certain ergonomics theory. When directed against Daru, the use of the rider's abilities is sure to be improved.

Furthermore, one of the planetary gears 29 is moved a little farther than the others, making the rider even stronger. When pressing down on the pedal with one foot, for example the right foot, variable sprocket 20 and pedal 1 It is possible to give a suitable direction of 2 and a slightly higher ratio. The planetary gear 29 is connected to the axle 13 maintained in a nearly symmetrical position.

However, such a slight change in practice is important for those who use bicycles primarily for competitive purposes. There will probably be only one shift.

The rotary wheel of the present invention can be ridden and pedal operated in the same way as conventional rotary wheels. However, it is not possible to reduce the conduction ratio by backpedaling, and it is necessary to reduce the conduction ratio by operating the brake pedal. The indexing flange 25 is slowed down relative to the drive flange 21 by applying the key 4 and the spiral waveform cam 26 move inward, and the planetary gears 29 and 31 are connected to the axle 13. It has been improved in that it contracts towards . The one-way clutch 18 keeps the bicycle quiet. Backpedal operation is possible even when the vehicle is stopped. When planetary gears 29 and 31 contract , a chain that surrounds the sprocket 20 and is pulled every time the sprocket 20 rotates. The amount of will decrease. Conversion to a high ratio is achieved by indexing flank 2 for drive flange 21. 5 is braked and slowed down, the forward pedal is operated, and the planetary gears 29 and 31 are This is achieved by expanding the . The tension on the chain causes the planetary gears 29 and 31 to Since it is activated and fixed in the recess 35, only the tension of the chain 32 is compared to the conventional chain. It is easier to change to high ratios when produced by the tensioning device 43. tension The device 43 moves the planetary gears 29 and 31 into the recess 3 when the rider does not actively pedal gravel. 5 and minimize tension on the chain 32 to absorb chain slack. Make it.

Claims (1)

[Claims] 1. A transmission having a variable sprocket, which includes an axle and a variable sprocket installed on the axle. a drive flange rotatably provided on the axle on the opposite side of the drive flange; an indexing flange having a plurality of helical wave-shaped cams; two striped rocket segments - a planetary gear and at least two idler planetary gears; , transmits a tangential force between the sprocket-segment-planetary gear and the drive flange. a coupling means attached to the planetary gear and joined to the helical wave cam; a cam follower associated with the helical wavy cam including a series of alternating protrusions and a loose cam; As the star gear slides along the helical wave cam, it moves the planet gear closer to the axle and A transmission device that moves the gears away from each other. 2. In the transmission according to claim 1, the variable sprocket is a link or It is designed to engage a chain made from and the chain has a pitch equal to the number of variable sprockets. around half of the circumference of the sprocket, and the tension of the chain causes the sprocket segment to This creates a tangential load on the Mento planetary gear and transfers it to the drive flange via the coupling means. The tension of the chain further generates a radial load on the planetary gear. The same is transmitted to the spiral wave-like cam by the cam follower, and the cam follower is transferred to the recess. When the cam follower is fixed in the recess and both striped rocket-segment When the planetary gears are engaged with the chain, the planetary gears are arranged in line with the sprocket. - Segment - Planet - The length of the chain hung between the cars is a multiple of the pitch. Gearbox as it is. In the transmission according to claim 2, the helical wave-shaped cam The planet box car is guided along the helical temporary cam by guiding the box-segment-planet gear. When sliding, their positions remain approximately symmetrical with respect to the axle, and at least one Two planetary gears are constantly engaged with the chain, and the sprocket Keto Segment - Only one of the planetary gears is temporarily engaged with the chain. gearbox. 4. In the transmission device according to any one of claims 1, 2, or 6, The planetary wheel has rotating means, which is separated from the helical wave cam under load. Transmission device that prevents the meeting of people. 5. Scope of the Statement For the transmission device according to any one of paragraphs 1, 2, or 6. In this case, the sprocket-segment-planetary gear has a positioning means and is not driven under load. A transmission device that prevents it from separating from the dynamic flange. 6. In the transmission device according to claim 1, 2 or 6, the drive flap including a pedal secured to the sprocket-segment-planet A transmission arranged radially approximately along a line through the gears. Z: In the transmission device according to any one of claims 1, 2, or 6. the sprocket-segment-planetary gear has a chain-engaging surface; The images should be at least partially removed so that when the planet gears are in the radially outer position gearbox that prevents the teeth from improperly engaging the chain. 8. In the transmission device according to any one of claims 1, 2, or 6. and includes spring means for preloading the interplanetary wheel on at least one of the flanges. Provided between the planetary gear and the flange to prevent the planetary gear from rattling. Shift it. 9. In the transmission device according to any one of claims 1, 2, or 6. wherein the drive flange has a radial keyway, and the planetary gear slides through the keyway. Align the planetary gears with a moving key and apply a tangential force to the sprocket - A transmission device in which transmission is transmitted between a planetary gear and the drive flange.