JPH03113170A - Speed change gear - Google Patents

Abstract

PURPOSE:To operate a speed change lever and a reverse revolution lever by an operating lever by installing an interlocking mechanism for allowing the movement of the reverse revolution lever to follow the movement of the operating lever for the part between a normal revolution zero speed point - reverse revolution zero speed point, between the operating lever, speed change lever and the reverse revolving lever. CONSTITUTION:When an output shaft 52 is in a normal revolution zero speed state, an operating lever 10 is at the F point in a crank groove, and each link 21, 23, 25, 26 of an interlocking mechanism 20 is at the (c) state. When the lever 10 is turned down to the normal revolution high speed position F' point from this state, the link 21 presses a high speed lever 64 as shown by (a), and a high speed state is generated, and the link 26 is turned forward in accordance with the motion of the lever 10. Further, when the lever 10 is turned down to the reverse revolution zero speed point R from a normal revolution zero speed state, the link 21 is pulled rearward as shown by (e), and the link 26 is turned rearward. In this case, the lever 64 does not move, and a reverse revolving lever 72 is turned down to a reverse revolution side. When the lever 10 turned to the reverse revolution high speed position R' from this state, the link 26 is pulled rearward as shown by (g), and the lever 64 is turned down to a high speed side.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a transmission, and particularly to a transmission in which the rotational speed of an output shaft and reverse rotation can be optimally controlled by a single operation lever.

[Conventional technology]

As a transmission that can change the rotation speed of the output shaft from high speed to zero speed and also reverse the rotation direction, for example, the transmission described in JP-A No. 60-14638 with a reversing mechanism added. US Patent 453986
There are No. 7 etc.

As shown in FIG. 5, this transmission has an input shaft 51 and an output shaft 52 connected via a transmission mechanism 60 and a reversing mechanism 70.

The transmission mechanism 60 has a crankshaft 65 attached to an eccentric position of the input shaft 51, and an eccentric pin 65b provided on the crankshaft 65 rotatably supports a variable-diameter ratchet wheel 66.
The pawl 66a of the ratchet wheel 66 is engaged with an internal gear 67 consisting of a large number of temporary springs.

Further, the sleeve 61 provided on the outside of the input shaft 51 is moved in the axial direction by moving the shifter 63 by rotating the speed change lever 64. By this movement of the sleeve 61, the bin 6 provided on the rank shaft 65 is
5a rotates the crankshaft 65 while moving along the helical groove 62 formed in the sleeve 61, and the eccentric pin 65
The outer diameter of the wind turbine 66 is changed by being eccentric with respect to the axis of the human-powered shaft 51.

Therefore, when the input shaft 51 is rotated, by operating the speed change lever 64 to make the eccentric bin 65b eccentric, the windmill 66 rotates and revolves, and further by operating the speed change lever 64, the eccentricity of the eccentric bin 65b is By changing , the number of rotations of the wind turbine 66 changes.

This rotational motion of the windmill 66 is transmitted to the reversing mechanism 70 by the Oldham joint 68.

The reversing mechanism 70 has a rotating shaft of a driving gear 71 to which the rotational motion of the windmill 66 is transmitted is fitted into an eccentric hole of an eccentric sleeve 73 having a reversing lever 72. By operating the reversing lever 72, the driving gear 71 is rotated. The direction of rotation of the output shaft 52 is switched depending on whether the rotational motion of the gear 71 is transmitted directly to the driven gear 74 or transmitted to the driven gear 74 via the idle gear 75 shown in FIG.

[Problem to be solved by the invention]

In the above-mentioned transmission, the gear shift operation is performed using the gear lever;
The reverse rotation operation is performed using the reverse rotation lever, but the reverse rotation operation is normally performed when the output shaft is stopped, and the speed change lever and the reverse rotation lever are not operated at the same time. Therefore, if the shift lever and reverse lever can be operated with a single lever, operability will be improved, and it will also be possible to prevent operational errors such as operating the reverse lever when operating the shift lever or while the output shaft is rotating. .

Therefore, an object of this invention is to provide a transmission in which the speed change lever and the reverse lever can be optimally operated with a single operation lever.

[Means to solve the problem]

In order to solve the above-mentioned problems, the present invention provides a transmission having a shift lever and a reverse lever.
An operating lever is provided that moves between the forward rotation zero speed position, reverse rotation zero speed position, and reverse rotation high speed position, and the operation lever is provided between the forward rotation high speed position and the forward rotation zero speed position and between the reverse rotation high speed position and the reverse rotation zero speed position. An interlocking mechanism is provided between the operating lever, the shifting lever, and the reversing lever to cause the movement of the gear shift lever to follow the movement of the shift lever, and to cause the movement of the reversing lever to follow the movement of the operating lever between the forward rotation zero speed position and the reverse zero speed position. I made it into a structure.

[Effect]

When the operating lever of the transmission configured as described above is moved from the forward rotation high speed position to the reverse rotation high speed position, the output shaft changes from the high speed normal rotation state to the stopped state, and in the rotation stopped state, the rotation direction is switched and the output shaft rotates at high speed. Changes to a reversed state. Further, when the operating lever is reciprocated between the respective positions, the speed of the output shaft is changed or the rotational direction is switched, and the output shaft is always in a stopped state when switching the rotational direction.

〔Example〕

Examples will be described below with reference to the drawings.

As shown in FIGS. 1 and 2, this transmission consists of a transmission main body 50, an operating lever 10, an interlocking mechanism 20, and a guide plate 30 for the operating lever 10.

Since the transmission main body 50 is the same as that described as the prior art, explanation of the internal structure etc. will be omitted and only a portion of the lever will be explained. The gear shift lever 64 that moves the shifter 63 is attached to the side of the transmission body 50 so as to rotate vertically, and when it is tilted toward the input side of the transmission body 50, it becomes a high-speed state, and conversely, when it is tilted toward the output side, it becomes zero. It becomes a fast state. Note that this shift lever 64 is biased to the zero speed state by elastic means within the transmission body 50. In addition, the reverse lever 72
Is this link the link 72a whose one end is connected to the eccentric position 'yw pin of the eccentric sleeve 73? One end is connected to the other end of 2a via a bottle, and the transmission main body 5 is connected with the part near the other end as a fulcrum.
0 and a lever 72b rotatably supported. Therefore, the eccentric sleeve 7 can be rotated by a small amount of rotation of the lever 72b.
A large rotation amount of 3 can be obtained.

The operation lever 10 has one end that is the lever? The gear lever 2b is connected to the other end of the gear lever 2b through a pin, and is configured to rotate in the same direction as the gear shift lever 64.

Further, as shown in FIG. 3, the operating lever 10 is pushed through a crank groove 31 provided in a guide plate 30, so that it can move along this crank groove 31.

The interlocking mechanism 20 includes four links 21, 23, 25.
It consists of 26 pieces. The link 21 has the operating lever 1 at one end.
0 is inserted through the elongated hole 22 formed at the other end, and the shift lever 64 is inserted through the elongated hole 22 formed at the other end. Further, the center portion of the link 25 is pin-coupled to the upper part of the transmission body 50.
One ends of a link 23 and a link 26 are coupled to both ends thereof. Long holes 24 and 27 are formed at the other ends of the links 23 and 26, respectively. The speed change lever 64 is inserted into the elongated hole 24, and the operation lever 1 is inserted into the elongated hole 27.
0 is inserted.

In the transmission configured as described above, when the output shaft 52 is in the normal rotation zero speed state, the operating lever 10
is located at point F of the crank groove 31, and each link 21.
23, 25, and 26 are in the state shown in FIG. 4(C). From this state, as shown in FIG. 4(b), the operating lever 1
0 to the normal rotation high speed position F', the link 21 pushes the gear shift lever 64 and enters the high speed state, and the link 26 rotates forward as the operating lever 10 moves. move.

Also, from the normal rotation zero speed state, the operating lever 10 is moved as shown in FIG.
When it is tilted to the reverse zero speed position R point shown in f), the link 21 is pulled rearward and the link 26 rotates rearward, as shown in FIG. 4(e). At this time, the speed change lever 64 does not move, and although not shown in the figure, the reverse rotation lever 72 falls to the reverse rotation side. From this state, when the operating lever 10 is moved to the reverse high speed position R' as shown in Fig. 4 (g)
), the link 26 is pulled rearward, and the end connected to the link 25 rotates rearward. Therefore, the other end of the link 25 pushes the link 23 forward,
This link 23 causes the gear shift lever 65 to fall toward the high speed side.

In addition, a force is constantly acting on the shift lever 64 to return to the zero speed position by a biasing means provided in the transmission body 50, and this force also causes the operating lever 10 to return to the zero speed position of forward rotation or reverse rotation. It is designed to return to its position. Therefore, as shown in FIGS. 1 and 2, if the operating lever 10 is biased in the forward rotation direction by the spring 28, the operating lever 10 will always return to the normal rotation zero speed position F, and this transmission will be activated. It is easy to use if it is frequently used in normal rotation.

As shown in FIG. 3, the operating lever 10 can be used as a pedal so that it can be operated with the foot (and it can be used as a transmission for an automobile. In this case, the forward rotation zero speed position F The operating lever 10 is located at the midpoint between
If a stopper 32 is provided to lock the drive gear 71 shown in FIG.
The output shaft 52 does not mesh with either the driven gear 74 or the idle gear 75, and the output shaft 52 can rotate freely, which can be used when an automobile is towed due to engine failure. When the stopper 32 is removed, the operating lever 10 is returned to the normal rotation zero speed position WF by the spring 28.

〔effect〕

As described above, the transmission of the present invention has good operability because the speed change lever and the reverse lever are interlocked so that they can be optimally operated with a single operation lever (the reverse lever is repeatedly operated during the rotation of the output shaft). It also prevents operational errors such as making mistakes.

[Brief explanation of drawings]

Fig. 1 is a sectional view showing an embodiment of the present invention, Fig. 2 is a perspective view showing the main parts of the same, Fig. 3 is a perspective view showing the external appearance of the operating section, Fig. 4(a), Figure 4 (C), Figure 4 (e) and Figure 4 (2) are plan views showing the movement of the interlocking mechanism, Figure 4 (0)), Figure 4 (6) and Figure 4 (f). and FIG. 4(c) is a plan view showing the positional relationship between the guide plate and the operating lever. 5 is a sectional view showing the internal structure of the conventional example, and FIG. 6 is a sectional view showing the internal structure of the conventional example.
Figure 7 and Figure 7 are cross-sectional views showing the movement of the same wind turbine as above, and Figure 8.
The figure is also a sectional view showing the main parts of the reversing mechanism. 10... Operation lever 20... Interlocking mechanism, 21.23.25.26... Link, 2
2.24.27...Straight hole, 28...Spring, 31...Crank groove, 64...Shift lever 73...Eccentricity sleeve. 30...Guide plate, 32...Stopper 72...Reverse lever

Claims (1)

[Claims] (1) In a transmission that is provided with a speed change mechanism that changes speed from high speed to zero speed using a speed change lever and a reversing mechanism that has a reversing lever between the input shaft and the output shaft, the forward rotation high speed position - normal rotation zero speed An operating lever is provided that moves between the following positions: - Reverse rotation zero speed position - Reverse rotation high speed position. An interlocking mechanism is provided between the operating lever, the shifting lever, and the reversing lever, which causes the movement of the shifting lever to follow the movement of the operating lever between the forward rotation zero speed position and the reverse rotation zero speed position. A transmission characterized by: