KR20020066353A - A Transmission system of vertical gear and multi-stage flat gear - Google Patents

Abstract

PURPOSE: A shifting apparatus for a vertical gear in a multistage flat groove gear is provided to shift completely and promptly by moving the vertical gear in the multistage flat groove gear regardless of friction from foreign matters, and to lengthen a life span by preventing damage of the gear. CONSTITUTION: A shift operating unit(3) is fastened by a fixing pin(11) for restricting the axial movement of the vertical gear at absence of shift command, and a shift contact unit(4) is separated from a shift sill of a multistage flat recess gear(1). The fixing pin is eliminated in shifting, and the shift contact unit is moved. A first contact part of the shift contact unit is contacted to the shift sill of the multistage flat recess gear, and a second contact part is engaged with the shift operating unit. Shifting is performed with moving the shift operating unit according to rotation direction of the multistage flat recess gear. The life span of the shift system is extended with preventing damage against overload.

Description

Control system for shifting in multi-stage flat groove gears and vertical gears {A Transmission system of vertical gear and multi-stage flat gear}

The present invention relates to a control device for the movement of the vertical gear in the transmission using a multi-stage flat groove gear. General gears have gear teeth protruding in the circumferential direction on the circumferential surface of the disk, but multi-stage flat groove gears have groove-shaped gear teeth that have a constant modulus on a circular plate and are arranged in the vertical plane of the disk and have the same modulus The number of teeth is different, but the teeth of the same groove shape are arranged with a plurality of stages in the radial direction. In order for shifting to take place, vertical gears with the same modulus vertically arranged with the multi-stage flat groove gears must move between the stages. Unlike a general transmission, in this shift, vertical gear movement for shifting may not always occur, and only at a point where a plurality of gear grooves coincide radially. Therefore, the control device is configured to shift when the operation command for shifting and the position of the multi-stage flat groove gear match. Application number (10-2000-0063636) 'Power transmission and transmission apparatus of a chainless bicycle' In the shift method of claim 2, the vertical gear may not be completely moved for shifting by friction. In this case, the vertical gear and the flat groove gear are damaged due to excessive load, or the multi-stage flat groove gear and the vertical gear become impossible to operate.

When the vertical gear moves on the multi-stage flat groove gear, the gear shifting device is operated by the rotational force by the contact of the shifting jaw on the multi-stage flat groove so that the gear shifting operation can be completed even if friction occurs due to the mixing of load and foreign matter. Move the vertical gears together. The shifting of the shifting jaw on the multi-stage flat groove gear is connected to the shifting of the shifting control device by the shifting of the shifting contactor which is moved by the shifting instruction.

1 is an overall three-dimensional perspective view of the transmission

2 is a front view of a transmission (medium speed)

3 is a plan view of FIG.

4 is a rear view of FIG.

5 is a coupling diagram of the high speed stage during the three-speed shift;

6 is a coupling diagram of the low speed stage during the three-speed shift;

7 is a coupling diagram of the operating device

<Explanation of symbols for the main parts of the drawings>

1: multi-stage flat groove gear 2: vertical gear

3: shift control device 4: shift contactor

5: power shaft 6: body

7: Front axle bearing part 8: Front axle

9: gear groove 10: power shaft spline

11: fixing pin 12: common trim

13: shifting jaw

41: shift contactor first contact portion 42: shift contactor second contact portion

As in the stereoscopic perspective view of FIG. 1, one multi-stage flat groove 1 and the front axle bearing 7 are coupled to the front axle 8 and the power shaft 5 is in contact with the front axle at the right angle to the front axle. The rotational movement is possible. A spline 10 is provided at the end of the power shaft, and a vertical gear 2 for rotating the gear groove 9 and the teeth of the multi-stage flat groove gear is capable of sliding in the direction of the power shaft along the spline. When the shift does not occur, the shift control device 3 for limiting the axial movement of the vertical gear is fixed by the fixing pin 11. Therefore, the vertical gear transfers the rotational force of the multi-stage flat grooved gear to the rotational motion of the power shaft. When there is no shift instruction, the shift contactor 4 is in the position as shown in FIG. 3 by the force of the spring, so that contact with the shifting jaw 13 of the multi-stage flat groove gear does not occur. If the shifting instruction is required, the shift pin is fixed to the shift operation device, and the shift contactor is moved so that the first contact portion 41 is able to contact the shifting jaw of the multi-stage flat groove gear and the second contact portion 42. Is engaged with the teeth of the transmission. In this case, when the multi-stage flat groove gear rotates clockwise in FIG. 2, since the shifting jaw rotates while contacting the shifting contact part, the second contact part which contacts the teeth of the shifting control device rotates counterclockwise and the shifting control device moves to the left. Thus, a shift is issued from the middle speed stage (Fig. 2 state) to the high speed stage (Fig. 5 state). In addition, in FIG. 2, when the multi-stage flat groove gear rotates in a counterclockwise direction, the shift contactor rotates in a clockwise direction when the shifting jaw comes into contact with the shifting contact, so that the shifting control device is turned to the right by the second contact part which contacts the teeth of the shifting control device. And shifting is made from the intermediate speed (FIG. 2 state) to the low speed stage (FIG. 6 state). After all, if you want to shift, if you press the shift instruction, the shift contactor moves and if you rotate the multi-stage flat gear in the clockwise direction while making contact with the shifting jaw, the vertical gear moves in a higher step step by step and the speed increases and rotates counterclockwise. In this case, the vertical gear moves to the lower stage by one step, which slows down the speed.

When the vertical gear moves on the multi-stage flat grooved gear, even if friction occurs due to the mixing of load and foreign matter, the shifting operation is completed. Therefore, the multi-stage flat grooved gear and the vertical gear are excessively moved by the incomplete vertical gear movement. It prevents damage due to load or pinch of multi-stage flat groove gears and vertical gears, which makes it impossible to operate, thus extending the life of the transmission and shifting quickly when desired.

Claims (1)

When there is no shift instruction, the shift control device 3 which restricts the axial movement of the vertical gear 2 is fixed by the fixing pin 11 and the shift contactor 4 is the shifting jaw of the multi-stage flat groove gear 1. (13) does not occur, but if the shift is desired, the fixing pin for fixing the shift control device is removed and the shift contactor is moved so that the first contact portion 41 of the shift contactor can contact the shifting jaw of the multi-stage flat groove gear. And the second contact portion 42 is engaged with the shifting control device so that the shifting control device moves left and right in accordance with the rotational direction of the multi-stage flat groove gear, so that shifting occurs.