JPH0721497U - Bicycle interior transmission - Google Patents

Abstract

(57) [Summary] [Object] An object of the present invention is to provide an internal transmission for a bicycle, which has an improved operability of the internal transmission with a planetary gear mechanism having five or more stages. [Structure] 5 by the planetary gear mechanism built into the rear wheel hub
In a multi-gear internal transmission with more than two stages, a half-grip cylinder part is divided into two parts on the thumb side, and the cylinder part on the thumb side and the reel are integrally formed, and a half grip type gear shifting operation with a positioning mechanism Internal gearbox for bicycles that is operated by tools. 1 ... rear wheel hub (built-in transmission), 5 ... half grip [Effect] The present invention enables quick shifting even in an internal transmission having five or more gears, and its operation is simple and gear shifting is possible. Therefore, it is possible to provide a highly practical transmission that does not require the hands to be released from the grips and achieves driving stability.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 An object of the present invention is to provide an internal transmission device for a motor vehicle, which has an improved operability of the internal transmission having a planetary gear mechanism having five or more stages.

[0002]

[Prior art]

 The conventional gear shifting operation tools for internal transmissions are mainly levers that push two operating levers with a finger like a piano touch lever, and thumb shifters are used for other gear shifting operations. There is. On the other hand, most of the practically used internal transmissions so far have three speeds, so the piano touch lever system in which the lever is pressed with the finger as described above or the thumb shifter operated by pinching with the finger is used. -The method was sufficient. In addition, even the method of shifting gears with two operating levers was not so inconvenient in a three-speed transmission.

In recent years, however, the internal transmission having five or more gears has been improved and put into practical use. As a gear shift operation tool, two operation levers are provided in the piano touch lever system. Since it is used and the lever has to be repeatedly pressed for the number of gears, the operation is very troublesome and this method is not suitable for practical use. On the other hand, although there has been proposed a type in which a gear shift operation is performed with one operating lever, the lever operation is repeated for the number of gears, and therefore, a transmission having five or more gears is used. It was not practical to use.

On the other hand, in the thumb shifter type that is operated by pinching with a finger, it is possible to shift gears at a stroke, but it is necessary to remove the finger from the handle grip during the gear shifting operation, and therefore the traveling during operation is performed. The downside is safety.

[0005]

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention As described above, when the gear shift operation tool, which has not been a problem in the three-stage internal transmission, is used in a transmission having a large number of gears such as five and seven gears, Many improvements were needed. For this reason, the present invention provides a transmission suitable for a multi-stage internal transmission having five or more stages in order to meet such a demand. That is, the gist of the present invention is to divide an internal multi-stage transmission having five or more stages by a planetary gear mechanism built into a rear wheel hub into two parts, a grip cylinder part and a thumb cylinder part. The present invention relates to a bicycle internal speed change device in which a hull grip type speed change operation tool having a positioning mechanism is integrally molded into a bicycle.

[0006]

[Action]

 In order to improve the gear shifting operability of an internal transmission with five or more gears, it is possible to perform gear shifting operations while holding the steering wheel, to be able to shift gears up to the number of gears you want to shift at once, and to perform gear shifting operations accidentally while running Conditions such as not being necessary are required. Therefore, in the present invention, by combining a multi-gear internal transmission with five or more gears and a half grip control, it is possible to perform gear shifting operations while holding the handle, and it is possible to shift gears up to the desired gear number. This is possible, and since the grip is separated into the fixed side and the movable side, there is no risk of accidentally shifting gears while driving. Further, since the half grip control is provided with a positioning mechanism which is synchronized with the internal transmission, the gear can be shifted to a desired number of gears.

[0007]

【Example】

Hereinafter, the present invention will be described in more detail with reference to examples. FIG. 1 is an overall view of a bicycle equipped with the bicycle internal transmission of the present invention. In the figure, reference numeral 1 denotes a rear wheel hub, which is fixed to a back claw 4 provided at an intersection of a back hawk 2 and a chain steering wheel 3. Then, 5 denotes a grip, which is attached to the tip of the handle bar -6, the grip 5 is divided into two and the cylindrical body portion 5 ₂ of the cylindrical portion 5 ₁ and little side of the thumb side ha - It is a grip. Reference numeral 7 is an outer wire incorporating an operating wire 8 which is guided to one shaft end of the rear wheel hub 1 and used for gear shifting operation.

FIG. 2 is a partially cutaway front view of the rear wheel hub 1, which is a transmission having a five-speed variable speed mechanism including a planetary gear mechanism inside. In the five-speed transmission illustrated here, the first sun gear 22 and the second sun gear 23 are fixed to the hub shaft 21, and the first planetary gear 24 and the second planetary gear 25 are provided correspondingly to the first sun gear 22 and the second sun gear 23, respectively. ing. The first planetary gear 24 and the second planetary gear 25 are supported by a gear cage 26. The first planetary gear 24 is provided with an internal gear 28 and is fixed in the axial direction to the gear ring 27, and the second planetary gear 25 is slid with an axially long internal gear 30. A gear ring 29 is arranged. Reference numeral 31 is a coupling sleeve which selectively cooperates with the sliding gear ring 29. The coupling sleeve 31 is attached to a pin 33 provided at the tip of a control rod 32 housed in the hub shaft 21. It is slidable in the axial direction. Further, 34 is a chain sprocket, which is integrated with a driving body 35, and the driving body 35 and the coupling sleeve 31 are fitted together by a spline 36. Reference numeral 37 is a hub shell, and 38 is a cap. In the drawings, description of dogs for connecting or disconnecting the respective members in the axial direction, ratchet teeth for connecting in the radial direction of the shaft, and the like will be omitted.

By sliding the control rod 32 housed in the hub axle 21 in the axial direction, the coupling sleeve 31 moves accordingly, and the above-mentioned gears are engaged with each other. They can be different, and the power transmitted to the chain sprocket 34 can be transmitted to the hub shell 37 with a multiple-speed shifting function.

On the other hand, FIG. 3 is a partially cutaway side view of the half grip 5. The grip 5 is divided into two parts, that is, a cylindrical part 5 ₁ on the parent finger side and a cylindrical part 5 ₂ on the little finger side. - are the Fugurippu, cylindrical portion 5 ₁ wire - is rotatably supported Le 9 and formed integrally into a high Ndoruba -6 - Li for winding. Although not shown, the reel portion 9 is provided with, for example, a disk with a groove for winding the operation wire-8, and a locking hole for fitting the end of the operation wire-8 into a part of the circumference thereof. Make a hole. A click ring 10 is fitted on the reel portion 9 so as to form an uneven surface in the axial direction. FIG. 4 is an enlarged cross-sectional view taken along the line AA in FIG. 3, in which the click ring 10 has a plurality of recesses 10 ₁ formed on the outer periphery thereof, while the punched portion 12 of the lever base 11 is formed. An inwardly facing claw 13 is fitted in, and a click spring 14 is brought into contact with the claw 13 to form a positioning mechanism. Reference numeral 15 is a blur killer. That is, ha - Fugurippu Therefore Li to rotate the cylindrical portion 5 ₁ of the thumb side in the direction of arrow A of 5 - Le 9 and click ring 10 will be rotated, recessed portion 10 ₁ of the click-ring 10 and The pawls 13 are sequentially slid to engage with each other for positioning. Then, the operation wire-8 is loosened by rotating in the direction opposite to the arrow A, and is returned by the spring built in the speed change device side.

According to the present invention, there is provided a bicycle internal transmission device that skillfully combines the above-described internal transmission having five or more gears and a half-grip type transmission. It was decided to be able to do it all at once.

Referring further to the drawings, in FIG. 2, a ball bearing 39 and a lock nut 40 are arranged on the outside of the chain sprocket 34, and an outer wire receiver 41 is fitted into the hub axle 21 to allow the nut to be inserted. The hub shaft 21 is provided with a hinge 33 which is axially supported to receive the operation wire 8 and which is connected to the control rod 32 so as to slide in the axial direction. It will be subject to motion. That is, the operation wire-8 is connected to the hinge 43 and pulled to bring about sliding of the control rod 32 in the axial direction.

[0013] That is, two-divided type Ha - a cylindrical body portion 5 ₁ of the thumb side of Fugurippu 5 can be rotated while gripping the other cylindrical body portion 5 _2, yet be one that was once rotatable, a tensile force by the operation wire -8 wound to the cylindrical portion 5 ₁ directly control the interior speed change unit - are those tied to Ruroddo 32. Therefore, the sliding of the control rod 32 in the direction of the hub shaft 21 can be performed easily and at a stroke, the operation itself is simple, there is no mistaken operation at the time of gear shifting, and traveling safety is secured. It was decided.

[0014]

[Effect of device]

 The present invention makes it possible to shift at once even in an internal transmission having five or more gears, and further, the operation is easy, and it is not necessary to take a hand from the grip for shifting, and traveling stability can be achieved. It was possible to provide an extremely highly practical transmission.

[Brief description of drawings]

FIG. 1 is an overall view of a bicycle equipped with a bicycle internal transmission of the present invention.

FIG. 2 is a partially cutaway front view of a rear wheel hub 1.

FIG. 3 is a partially cutaway side view of the half grip 5.

FIG. 4 is an enlarged cross-sectional view taken along the line AA in FIG.

[Explanation of symbols]

1 ‥‥ rear wheel hub, 2 ‥‥ Bakkuho - click, 3 ‥‥ Choi - Nsute -, 4 ‥‥ back claws, 5 ‥‥ grip, the cylindrical portion of the 5 ₁ thumb side of ‥‥ grip 5, 5 ₂ ‥ the cylindrical body portion of the little finger side of ‥ grip 5, 6 ‥‥ Handoruba -, 7 ‥‥ outer - wire -, 8 ‥‥ operation wire -, 9 ‥‥ Li - Le unit, 10 ‥‥ click ring, 10 ₁ ‥‥ Recessed part of the click ring 10, 11 ... lever base, 12 ... perforated part of the lever base 11, 13 ... inward claws, 14 ... click spring, 15 ... breaker lever, 21 ... Hub shaft, 22 ... first sun gear, 23 ... second sun gear, 24 ... first planetary gear, 25 ... second planetary gear, 26 ... gear cage, 27 ... internal gear 18 Gear ring provided with 28 ... Internal gear, 29 ... Sliding gear ring provided with internal gear 20 30 Internal gear, 31 Coupling sleeve, 32 Control rod, 33 ... Pin of control rod tip, 34 Chain sprocket, 35 Drive, 36 Spline, 37 ... hub shell, 38 ... cap, 39 ... ball mat, 40 ... lock nut, 41 ... outer wire-receiver, 42 ... nut, 43 ... hinge.

Claims (1)

[Scope of utility model registration request] 1. An internal multi-stage transmission having five or more gear stages using a planetary gear mechanism incorporated in a rear wheel hub, in which a grip cylinder portion is divided into two parts on the thumb side and the thumb side cylinder and reel are arranged. An internal transmission for a bicycle, which is integrally formed and operated by a half-grip type shift operation tool with a positioning mechanism.