JP5491443B2 - Variable speed transmission device - Google Patents

Description

  The present invention relates to a transmission transmission device, and more particularly to a bicycle middle (front) transmission or rear transmission, utilizing a combination of a transmission ratchet set and a middle transmission or rear transmission to change the speed of a bicycle. The present invention relates to a speed change transmission device that can perform a downshift function more speedily and accurately.

A general bicycle shift transmission device uses a bicycle shift change, and many adopt an operation method in which a shift cable is coupled to a ratchet gear shift mechanism and a shift lever.
By moving a pair of shift levers arranged on both handles, it is linked to the operation of the ratchet gear transmission mechanism of the corresponding two transmissions, that is, the middle (front) transmission near the pedal or the rear transmission near the rear wheel axle. And achieve the purpose of upshifting and downshifting.

In operation, when the ratchet gear speed change mechanism is interlocked with the speed change lever, the flywheel shifts up by one step.
If it is necessary to perform multi-stage conversion, the shift lever must be moved continuously, and multi-stage shift changes cannot be performed at once.
The present invention has been made in view of the above-described drawbacks of conventional transmission transmission devices.

JP-A-8-20378

  A problem to be solved by the present invention is to use a transmission cable on a transmission ratchet set by using a coupling between a transmission ratchet set and an intermediate transmission or a rear transmission for a middle (front) transmission or rear transmission of a bicycle. Is connected to the speed change lever, and after setting the speed change ratchet set on the speed change lever, it is affected by factors such as speed change cable fatigue tension and line resistance friction during operation. It is an object of the present invention to provide a speed change transmission device that can avoid occurrence of errors or errors.

In order to solve the above problems, the present invention provides the following transmission transmission device.
The shift transmission device has shift shift change, shift up, and shift down functions, and combines a shift ratchet set on the middle transmission or the rear transmission. First, shift ratchet set coupling by the rear transmission will be described.
The operating principle is that after the speed change lever is moved, the speed change cable is scrolled, so that the speed change ring is scrolled on the speed change ratchet set, thus interlocking with the ratchet scroll, thereby providing an interlocking relationship with the ratchet. The transmission mandrel scrolls synchronously clockwise, thereby pushing the buckle chain wheel on the middle or rear transmission, thereby moving the sprocket on the chain flywheel that engages the buckle chain wheel, Achieve shift shift, shift up and down functions.

  When the transmission ring scrolls from a fixed angle to a maximum angle, the transmission achieves a shift change function from one stage to multiple stages, and when the transmission ring scroll is below the fixed angle, the transmission After the mandrel scrolls counterclockwise, the buckle chain wheel is pulled back, the transmission achieves a one-step downshifting function, and the rider is able to Alternatively, quick shift shift change, shift up and shift down of the rear transmission are achieved.

The transmission ratchet set includes a front lid, a ratchet, a lever annular body, a hook, a transmission ring, a recovery spring, and a bottom base. A recovery spring is installed between the bottom base and the transmission ring, and the recovery spring is provided. After scrolling the speed change ring, return it to the original point,
A transmission ring base and a cover ring are installed at the front end of the base, a transmission ring is fitted on the transmission ring base, a lever ring is installed on the cover ring, and several pieces are installed. The screw is screwed on the base, and the outer edge of the screw head is engaged with the block edge in the speed change ring, and the speed change ring is engaged and fixed on the speed change ring base. As a result, the shift ring does not fall off unevenly when scrolling left and right around the shift ring base.

A wire tank is installed outside the transmission ring, installed through a transmission cable, screwed with a screw, a slide tank is installed around the periphery of the fitting hole on the transmission ring, and a space at the center position in the fitting hole. Contains a ratchet, lever, lever ring base, and hook, and the ratchet is fitted and installed on the transmission elliptical shaft, and both are linked, with the lever head at the lever front and the middle front Is the pushing contact part, the lever end is installed at the rear end, the lever end engages in the slide tank, the drill is installed at the middle position of the lever, and after the screw passes the drill, the lever is placed on the swing rod. The hook is attached to the front end of the hook, the push part is installed on the rear side of the middle stage, the block part is installed on the rear end, and the hook is installed on the ratchet. Position the perforation and install the screw, but the perforation After passing through, the hook, and screwed to the bottom base of the convex bar on, front lid to seal the fitting hole.

Furthermore, using a screw, installing with a spring, pressing and controlling the front lid, the spring installed to restore the original point to the transmission ring, thus assembling the transmission device of the present invention When the shift lever is moved from the fixed angle to the maximum angle, the shift ring is interlocked and scrolls from the fixed angle to the maximum angle. After the shift ring is scrolled, the shift ring is slid. The lever is engaged with the end of the lever in the tank, receives the interlock, and rotates the hole at the middle position of the lever around the center, and the pushing contact portion of the lever pushes and moves the hook.

As a result, the hook portion of the hook leaves the ratchet, the center shaft of the intermediate transmission or the rear transmission having an interlocking relationship with the ratchet scrolls, and at the same time, the hook portion of the hook leaves the ratchet. The hook block blocks the ratchet;
The lever head is inserted on the ratchet, so that the transmission mandrel rotates counterclockwise by the action of the recovery spring and cannot return to its original position, When the speed change lever is moved to the maximum angle and the speed change ring is scrolled, the lever scrolls the ratchet in a clockwise direction, and the speed change shaft is operated in a multi-stage shift. When a change is made, and thus the transmission ring scrolls from a fixed angle or more to a maximum angle, the transmission achieves the function of quickly making shift changes from one stage to more than one stage at a time.

When the rider moves the shift lever below a fixed angle and the shift lever recovers the original point, the shift ring is interlocked and scrolls below the fixed angle to restore the original point. After the speed change ring starts scrolling at the original point, the lever end engaged with the speed change ring in the slide tank is interlocked, and rotates around the perforation at the middle position of the lever. The push contact part is moved by pushing the hook.

  As a result, the hook portion of the hook leaves the ratchet, and the center shaft of the middle transmission or the rear transmission having the interlocking relationship with the ratchet scrolls the recovery spring counterclockwise, At the same time that the hook part leaves the ratchet, the lever head is inserted onto the ratchet after the ratchet scrolls counterclockwise by one step ratchet distance, and the hook block part blocks the ratchet. Thus, the transmission mandrel cannot rotate and return to its original position even once due to the action of the recovery spring, and when the scroll of the transmission ring is below a fixed angle, Achieve a single downshift function.

  According to the transmission device of the present invention, the transmission cable on the transmission ratchet set is used for a middle (front) transmission or rear transmission of a bicycle, and by combining the transmission ratchet set with the middle transmission or the rear transmission. Is connected to the speed change lever, so that the changeover of the speed change from one step to multiple steps can be performed quickly, speedily and accurately, and the load on the speed change cable can be reduced. As a result, it is possible to prevent the chain on the flywheel from becoming inaccurate or causing an error during shifting movement.

It is a three-dimensional decomposition schematic diagram of the present invention. It is a three-dimensional combination schematic diagram of the present invention. It is a cross-sectional schematic diagram of a mode that this invention was assembled in the rear transmission. It is a schematic diagram which shows the non-scrolling state of this invention ratchet. It is a schematic diagram which shows the scroll state of this invention ratchet. It is a disassembled schematic diagram of a state in which the present invention is assembled in a middle transmission.

  The best mode for carrying out the present invention will be described in detail below with reference to the drawings.

  As shown in FIGS. 1 to 6, the speed change transmission device is used for a middle (front) transmission 91 in the vicinity of a bicycle pedal or a rear transmission 20 in the vicinity of a rear wheel axle, and a speed change ratchet set 80 and an intermediate transmission 91, The rear transmission 20 is directly coupled.

First, the rear transmission 20 and the transmission ratchet set 80 near the rear wheel shaft will be described with reference to FIGS.
When the transmission ratchet set 80 and the rear transmission 20 are coupled, the base 30 is fitted on the rear transmission shaft 21 and is screwed together with screws 301.
An elliptical shaft 22 is installed at the end of the rear transmission shaft 21 of the rear transmission 20, and a ratchet 60 is engaged and fixed on the elliptical shaft 22.
When the ratchet 60 is scrolled, the elliptical shaft 22 is also scrolled synchronously, and the rear transmission shaft 21 having the interlocking relationship is scrolled synchronously clockwise.
As a result, the buckle chain wheel 23 on the rear transmission 20 is pushed out, and the chain engaged with the buckle chain wheel 23 moves the sprocket on the flywheel to achieve the shift shift change, shift up, and shift down functions. .

The transmission ratchet set 80 includes a front lid 70, a ratchet 60, a lever annular body 50, a hook 31, a transmission ring 40, a recovery spring 37, and a bottom base 30.
A shaft hole 302 is installed at the center position of the base 30 and is installed through the rear transmission shaft 21. At the front end of the bottom base 30, a transmission ring base 33 is installed in a protruding shape, and the transmission ring 40 is coupled.
A plurality of screw holes are provided on the front side surface of the transmission ring 40, the front lid 70 is fixed and installed, and a compression control hole 72 is installed at the center of the front lid 70.

Using a screw 73, screw into the compression control hole 72, install it with a recovery spring 74, fix it in the rear transmission 20, and fix the front lid 70, the transmission ring 40, and the base 30 to the rear Control is performed by pressing on the transmission 20.
A recovery spring 37 is installed between the base 30 and the transmission ring 40, and the recovery spring 37 rotates the transmission ring 40 to return it to the original point.

A cable base 32 is installed on the outer diameter side of the bottom base 30, and the transmission ring base 33 and the covering ring 34 are installed in a protruding manner at the front end. A convex column 35 is installed on the outer edge of the transmission ring base 33, and a perforation 351 is installed on the convex column 35 to accommodate the steel ball 352 and the spring 353.
Further, the steel ball 352 and the spring 353 are screwed into the perforation 351 by using a screw 354. Accordingly, the lever annular body 50 is adjusted corresponding to the buffer hole 51 on the lever annular body 50, and the original speed is recovered.

The transmission ring 40 is fitted and installed on the transmission ring base 33, and the lever annular body 50 is fitted and installed on the covering ring 34. A block edge 41 is provided at the inner diameter position of the transmission ring 40. After the screw 42 is screwed into the screw hole 331 on the speed change ring base 33, the outer edge of the head of the screw 42 is fixed to the block edge 41 in the speed change ring 40, and the speed change ring 40 is fixed to the speed change ring 40. Engage and fix on the ring base 33.
As a result, it is possible to prevent the transmission ring 40 from falling off when rotating left and right on the transmission ring base 33.

A wire tub 43 is installed on the outer edge of the transmission ring 40, installed through the transmission cable 24, and screwed with a screw 42. A fitting hole 44 is provided at the center of the transmission ring 40, and a slide tank 45 is provided at an appropriate position on the outer periphery of the outer diameter of the fitting hole 44.
A ratchet 60, lever 53, lever annular body 50, and hook 31 can be accommodated in the space inside the fitting hole 44.

An elliptical hole 61 is installed at the center position of the ratchet 60, and the elliptical hole 61 is fitted on the elliptical shaft 22 of the rear transmission 20 for installation. A lever head 54 is provided at the front end of the lever 53, a pushing contact portion 55 is provided at the front side of the middle stage, and a lever end 56 is provided at the rear end.
The lever end 56 is engaged in the slide tank 45, and a perforation 57 is provided in the middle position of the lever 53.
After the screw 58 passes through the perforation 57, the lever 53 is screwed onto the lever movable base 521 of the swing rod 52.

A fitting hole 501 is installed at the center position of the lever annular body 50, a buffer hole 51 is installed annularly at the outer diameter position, and a swing rod 52 and a lever movable base 521 are installed on the side.
The fitting hole 501 is fitted on the cover ring 34 of the base 30 so that the lever annular body 50 can rotate left and right on the cover ring 34.
A hook portion 311 is installed at the front end of the hook 31, a perforation 312 is installed at the rear side of the middle stage, and a hook end 313 and a block portion 314 are installed at the rear end.

The hook portion 311 of the hook 31 is installed on the ratchet 60, and after the screw 315 passes through the perforation 312, the hook 31 is screwed onto the convex base 36 of the transmission ring base 33.
A plurality of screw holes 71 are provided on the upper peripheral edge of the front lid 70, and a compression control hole 72 is provided at the center position. The front lid 70 is screwed into the front side of the transmission ring 40 and then seals the fitting hole 44.

After screwing into the compression control hole 72 using a screw 73, the recovery spring 74 is hung and installed, and fixed in the rear transmission 20, and the front lid 70, the transmission ring 40, the base 30 Are then controlled by pressing on the transmission 20 to eliminate assembly tolerances.
A recovery spring 74 installed in a hung manner allows the transmission ring 40 to return to its original position after scrolling, thus completing the transmission transmission device of the present invention.

In the speed change transmission device shown in FIG. 4, when the rider moves the speed change lever 97 from a fixed angle or more to a maximum angle, the speed change cable 24 pulls and scrolls the speed change ring 40.
As a result, when the transmission ring 40 scrolls from a fixed angle or more to a maximum angle, the transmission ring 40 engages with the lever end 56 in the slide tank 45 on the transmission ring 40 and is interlocked.
This also causes the lever 53 to rotate around the screw 58 that is screwed together, and the pushing contact portion 55 of the lever 53 pushes and moves the hook end 313 of the hook 31.
Further, this causes the hook portion 311 of the hook 31 to leave the ratchet 60, and thus the rear transmission shaft 21 having the interlocking relationship with the ratchet 60 can be scrolled.

Moreover, at the same time that the hook portion 311 of the hook 31 leaves the ratchet 60, the block portion 314 of the hook 31 blocks the ratchet 60, and the lever head 54 is inserted between the ratchet 60. . As a result, the rear transmission shaft 21 rotates counterclockwise by the action of the recovery spring and cannot return to the original point.
At this time, when the speed change lever 97 is further moved to the maximum angle and the speed change ring 40 is scrolled, the lever 53 causes the ratchet 60 to scroll in a clockwise direction, and simultaneously, the speed change shaft 21 is scrolled. The rear transmission 20 is interlocked to complete conversion of a plurality of shifts.
Thus, when the transmission ring 40 scrolls from a fixed angle or more to a maximum angle, the function of the rear transmission 20 to shift up from one stage to multiple stages can be achieved. This eliminates the need for multi-stage shift operations and eliminates frequent shift operations, thereby reducing the load on the transmission cable 24.

In the speed change transmission device shown in FIG. 5, the rider moves the speed change lever 97 below a fixed angle, and the speed change cable 24 pulls and scrolls the speed change ring 40, and then the slide tank 45 on the speed change ring 40. Engage with the inner lever end 56 and receive interlocking.
As a result, the lever 53 rotates around the screwed screw 58, and the pushing contact portion 55 of the lever 53 pushes and moves the hook end 313 of the hook 31, thereby causing the hook portion 311 of the hook 31 to move. Leaves the ratchet 60 and releases the position of the ratchet 60.

In addition, as a result, the ratchet 60 rotates counterclockwise and is shifted down by one step, and then is blocked by the block portion 314 and the lever head 54 of the hook 31, and at the same time, the hook portion 311 of the hook 31 is , Hold the ratchet 60 and hold it.
Thus, when the shift lever 97 is moved below a fixed angle, a one-step downshift function is achieved.

Next, the middle (front) transmission near the pedal and the transmission ratchet set 90 will be described.
The main structure of the speed change ratchet set 90 is substantially the same as that of the speed change ratchet set 80 of the rear transmission 20, but in the speed change transmission device shown in FIG. The bottom cover 92 is fitted on the intermediate transmission shaft 93 and is screwed together with screws 94.
An elliptical shaft 95 is installed at the end of the middle transmission shaft 93 of the middle transmission 91, and a ratchet 96 is engaged and fixed on the elliptical shaft 95.
When the ratchet 96 is scrolled, the intermediate transmission shaft 93 is scrolled synchronously, thus achieving a shift-up or shift-down function.

  As described above, according to the speed change transmission device of the embodiment of the present invention, the speed change shift change, the upshift, and the downshift function are combined, and the shift ratchet set 80 is coupled to the middle transmission 91 and the rear transmission 20, As a result, when the speed change ratchet set 80 is installed on the speed change lever 97, fatigue tension of the speed change cable 24 is avoided in the operation, which is affected by factors such as line resistance friction, and the speed change change of the chain on the flywheel is not affected. It is accurate or avoids errors.

  The speed change cable 24 of the speed change ratchet set 80 is connected to the speed change lever 97, and after the speed change lever 97 is moved, the speed change cable 24 is scrolled, so that the speed change ring 40 is scrolled on the speed change ratchet set 80 and thus the ratchet. When the rear transmission core 21 is interlocked with the ratchet 60 and the rear transmission core 21 is scrolled clockwise, the ratchet set 80 is pushed out and the transmission ring 40 is fixed. When scrolling from more than this angle to the maximum angle, the transmission achieves upshifts from one stage to more than one stage.

When the scroll of the transmission ring 40 is below a fixed angle, the rear transmission mandrel 21 scrolls counterclockwise, then pulls back the ratchet set 80, and the transmission achieves a one-step downshift function, Can control the quick shift-up and shift-down of the transmission according to the difference in the angle at which the shift lever 97 is moved.
The above-mentioned names and contents of the present invention are only used for explaining the technical contents of the present invention, and do not limit the present invention. All equivalent applications or parts (structures) conversion, replacement and increase / decrease in quantity based on the spirit of the present invention shall be included in the protection scope of the present invention.

  The present invention has the novelty that is a requirement of patents, has sufficiently advanced as compared with conventional similar products, has high practicality, meets the needs of society, and has a great industrial utility value.

20 Rear transmission
21 Rear transmission shaft
22 Elliptical axis
23 Buckle chain wheel
24 transmission cable
30 base
301 screw
302 Shaft hole
31 hook
311 Hook part
312 drilling
313 hook end
314 block
315 screws
32 cable stand
33 Shifting ring base
331 screw
34 Cover ring
35 Convex column
351 drilling
352 steel balls
353 Spring
354 screws
36 Convex
37 Recovery spring
40 Speed change ring
41 Block edge
42 screws
43 wire tank
44 Fitting tank
45 Slide tank
50 lever ring
501 fitting hole
51 Buffer hole
52 Swing rod
521 Lever movable base
53 Lever
54 Lever head
55 Push contact
56 Lever end
57 drilling
58 screws
60 Ratchet
61 Elliptical hole
70 Front lid
71 Screw hole
72 Pressure control hole
73 screws
74 Recovery spring
80-speed ratchet set
90 speed ratchet set
91 Medium transmission
92 Bottom cover
93 Medium transmission shaft
94 screw
95 Elliptical axis
96 Ratchet
97 Shift lever

Claims (1)

A transmission device for use in a middle or rear transmission of a bicycle, wherein a transmission ratchet set is directly coupled to a center shaft of the middle or rear transmission,
The transmission ratchet set directly connected to the center shaft of the middle transmission or the rear transmission consists of a base, a transmission ring, and a front lid.
The bottom base is provided with a shaft hole at a central position and installed through a transmission shaft, and a transmission ring base and a covering ring are installed in a protruding shape at the front end of the base, and on the transmission ring base, The shift ring is fitted and installed, and the lever ring is fitted and installed on the covering ring,
A plurality of screw holes are installed on the front surface of the transmission ring, the front lid is fixed and installed, a fitting hole is installed at the center position, and a ratchet, lever, lever annular body, A hook can be accommodated, and a slide tank is installed at an appropriate position on the outer periphery of the fitting hole.
The front lid is provided with a compression control hole at a center position, screwed into the compression control hole using a screw, installed with a recovery spring, fixed in the rear transmission, the front lid, the speed change A speed change transmission device for controlling a ring and the speed change ring base by pressing the ring speed on the intermediate transmission or the rear transmission.

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