WO2013155649A1

WO2013155649A1 - Reverse rotation variable speed control mechanism

Info

Publication number: WO2013155649A1
Application number: PCT/CN2012/000637
Authority: WO
Inventors: 叶雪峰
Original assignee: Ye Xuefeng
Priority date: 2012-04-21
Filing date: 2012-05-11
Publication date: 2013-10-24
Also published as: CN102602503A; NL2009423C2; NL2009423A; DE102012107978A1; CN102602503B; DE102012107978B4

Abstract

Disclosed is a reverse rotation variable speed control mechanism, wherein a toggle lever (4) and a control block (3) are provided in a recess of a linkage member (7), a toggle toothed wheel (8) and the toggle lever (4) drive the control block (3) in rotation, a pressure spring (5) presses on the toggle lever (4) and the control block (3), one end of the toggle lever (4) is an incomplete toothed wheel, and when an input shaft rotates in the reverse direction, the other end of the toggle lever (4) drives the control block (3) in rotation, and when the input shaft rotates forwards, the toggle lever (4) returns to its starting position and will not drive the control block (3) in rotation. Engage/disengage claws (6) are provided on the periphery of a central wheel (1), the engage/disengage claws (6) being able to connect by meshing with teeth of the central wheel (1). A helical spring (2) is provided on the linkage member (7), and under the action of the helical spring (2), the linkage member (7) rotates around the axis of the central wheel (1). In the mechanism, by means of the toggle toothed wheel (8) and the toggle lever (4) driving the control block (3) in rotation, the control block (3) then rotates a number of engage/disengage claws (6) by means of the linkage member (7), and the engage/disengage claws (6) lock or release the central wheel (1) of a variable speed device to change the speed. It is only necessary to reverse the input shaft once for the gear ratio of the variable speed device to change once, thereby facilitating control of speed change.

Description

Reverse shift control mechanism

The invention belongs to the category of electromechanical devices, and relates to a shifting mechanism, in particular to a reverse shifting control mechanism. Background technique

Planetary gear transmissions are widely used due to their compact size and large transmission torque. However, it is complicated to design a multi-speed ratio planetary gear train and a shifting mechanism, and it is also necessary to design a shift control system with a dedicated external power, which limits its wide application.

For example, the bicycle rear wheel internal transmission and the mid-shaft transmission, which is a very compact and very practical transmission, has been favored by customers as soon as it appears. However, because of their small size, how to control the movement of the transmission becomes a very important issue. If the shifting is carried out manually, additional power and control lines are required, and the control line is required to be long, the control mechanism is complicated, and it is difficult to implement. It is a good way to control the shifting speed by using a bicycle to step on it, saving many transmission parts. Summary of the invention

SUMMARY OF THE INVENTION The object of the present invention is to provide a reverse shift control mechanism that uses an incomplete gear to perform an action by reversing the input shaft. As long as the input shaft is reversed once, the speed ratio of the transmission is changed once, which is convenient for control and simple in structure. And reliable.

The technical solution of the present invention is as follows:

A reverse shifting control mechanism includes a center wheel of a planetary gear train of a transmission, the mechanism further comprising a toggle lever, a control block, a compression spring, a linkage, a plurality of clutch pawls, a toggle gear, and a helical spring , wherein the linkage member and the shifting gear are disposed at an axis of the center wheel;

The linkage member is provided with a groove, and a toggle lever and a control block connected with the toggle lever are disposed in the groove; the toggle gear and the toggle lever drive the control block to rotate, and the compression spring is pressed against the toggle lever and On the control block, one end of the toggle lever is an incomplete gear. When the input shaft rotates in the reverse direction, the other end of the toggle lever drives the control block to rotate. When the input shaft rotates in the forward direction, the toggle lever returns to the starting position and does not drive control. Block rotation

The clutch pawl is disposed on an outer circumference of the center wheel, and the clutch pawl is meshably coupled to the teeth of the center wheel; The spiral spring is disposed on the linkage, and the linkage rotates around the axis of the center wheel under the action of the spiral spring;

The mechanism drives the control block to rotate by the shifting gear and the toggle lever, and the control block drives the clutch claws to rotate through the linkage member, and the clutch pawl locks or releases the center wheel of the transmission to realize the shifting;

When the clutch pawl locks the center wheel under the action of the linkage, the transmission operates at a speed ratio, and when the clutch pawl is disengaged from the center wheel by the linkage, the transmission operates at another speed ratio.

The linkage has two relatively fixed positions, one of which is a position corresponding to the locking of the center wheel, and the position is a position at which the linkage member drives the clutch claw to lock the center wheel under the action of the spiral spring, and the other position is The rotation of the control block drives the movement of the linkage to disengage the clutch pawl from the center wheel.

There are several spiral springs, and a plurality of spiral springs are disposed on the outer edge of the linkage.

The reverse shift control mechanism of the present invention is a shift control mechanism for a planetary gear train that realizes shifting by reverse rotation of an input shaft (generally a carrier). The principle of the present invention is to realize the reverse shifting with the incomplete gear, and to control whether the center wheel of the planetary gear train is rotated by the clutch pawl to obtain different speed ratios. If the center wheel is loose, the input shaft is reversed once, the clutch claw of the mechanism locks the center wheel of the planetary gear train; conversely, if the center wheel is locked, the input shaft reverses once, and the clutch claw and the center wheel are off. Open, thus achieving shifting.

The reverse shift control mechanism of the present invention performs an operation by the reverse rotation of the input shaft, and as long as the input shaft is reversed once, the speed ratio of the transmission is changed once to facilitate control. This mechanism adopts incomplete gears to control the rotation angle of the control block when reversing or reversing, so that the angle of the inverted step is not limited and convenient for control. As long as the angle of the step is greater than a small angle (such as 30 °), it is simple and reliable. BRIEF abstract

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a schematic view showing the structure of a reverse shift control mechanism of the present invention, showing that the center wheel is rotatable.

Fig. 2 is a view showing a state in which the transmission is in another speed ratio when the clutch pawl of the mechanism of Fig. 1 locks the center wheel, indicating the state in which the center wheel is locked.

Fig. 3 is a positional state diagram showing the movement of the control block in the mechanism of Fig. 1 to drive the linkage member to disengage the clutch pawl from the center wheel, showing the position of each component before the second reversal.

Fig. 4 is a view showing a positional state in which the clutch is reversed, the shifting gear drives the toggle lever and the control block to rotate, and the clutch pawl is disengaged from the center wheel, showing the position of each component after the second reverse rotation. Figure 5 is a partial enlarged view of the toggle gear and the toggle lever actually used by the mechanism, showing the tooth shape of the toggle gear and the toggle lever.

Reference mark:

1 is the center wheel of the planetary gear train, 2 is a spiral spring, 3 is a control block, 4 is a toggle lever, 5 is a compression spring, 6 is a clutch pawl, 7 is a linkage, and 8 is a toggle gear. BEST MODE FOR CARRYING OUT THE INVENTION

A reverse shift control mechanism of the present invention will now be described in detail with reference to the accompanying drawings and embodiments. Referring to Figures 1 to 5, the present invention provides a reverse shifting control mechanism which is mainly composed of a center wheel 1, a toggle lever 4, a control block 3, a compression spring 5, a linkage 7, and a number of a planetary gear train of a transmission. The clutch pawl 6, the toggle gear 8 and the helical spring 2 are formed, wherein the linkage 7 and the toggle gear 8 are disposed at the axis of the center wheel 1.

The linkage member 7 is provided with a groove in which the toggle lever 4 and the control block 3 are disposed, and the toggle lever 4 is connected to the control block 3.

The shifting gear 8 and the toggle lever 4 drive the control block 3 to rotate, and the compression spring 5 is pressed against the toggle lever 4 and the control block 3. The compression spring 5 shown in the figure is a leaf spring. One end of the toggle lever 4 is an incomplete gear, and is rotated by a certain angle by the toggle gear 8, and the other end of the toggle lever 4 is connected to the control block 3. When the input shaft rotates in the reverse direction, the other end of the toggle lever 4 drives the control block 3 to rotate. When the input shaft rotates in the forward direction, the toggle lever 4 returns to the starting position, and during the process of returning to the starting position, the shifting is performed. The lever 4 does not drive the control block 3 to rotate.

A plurality of clutch claws 6 are provided on the outer circumference of the center wheel 1, and the clutch claws 6 are meshably coupled to the teeth of the center wheel 1. Five clutch jaws 6 are shown. The clutch pawl 6 is provided to control whether the center wheel 1 is rotated. The linkage 7 controls the synchronized movement of the five clutch jaws 6.

The spiral spring 2 is disposed on the link member 7, and the link member is rotated about the axis of the center wheel 1 by the action of the spiral spring 2. The spiral spring 2 may have a plurality of, and a plurality of spiral springs 2 are disposed on the outer edge of the link member 7.

The linkage member 7 has two relatively fixed positions, one of which is a position corresponding to the locking of the center wheel 1, which is a position at which the linkage member 7 drives the clutch pawl 6 to lock the center wheel 1 under the action of the helical spring 2. The other position is the position at which the control block 3 rotates to move the linkage 7 to disengage the clutch pawl 6 from the center wheel 1. The reverse shift control mechanism of the present invention drives the control block 3 to rotate by the dial gear 8 and the toggle lever 4, and the control block 3 drives the plurality of clutch pawls 6 to rotate by the linkage member 7, and the clutch pawl 6 locks the center wheel 1 of the transmission. Or release to achieve shifting. When the clutch pawl 6 locks the center wheel 1 under the action of the linkage 7, the transmission operates at a speed ratio, and when the clutch pawl 6 is disengaged from the center wheel 1 by the linkage 7, the transmission is another Speed ratio work. Industrial applicability

Hereinafter, the transmission of the planetary gear train will be taken as an example to specifically explain the technical solution of the present invention. This type of speed changer is based on whether the center wheel of the planetary gear train is locked for shifting.

The linkage 7 is acted upon by the control block and the spring and has two relatively fixed positions. One of the positions corresponds to the position at which the center wheel 1 is locked. As shown in Figs. 2 and 3, this position is a position at which the link member 7 drives the clutch pawl 6 to lock the center wheel 1 under the action of the spiral spring 2. As shown in Figs. 1, 4, the other position is a position at which the control block 3 rotates to move the link member 7 to disengage the clutch pawl 6 from the center wheel 1. The linkage 7 can drive a plurality of clutch jaws 6 to rotate synchronously, and its two relative fixed positions respectively correspond to two different speed ratios of the transmission.

The relationship between the clutch pawl 6 and the transmission center wheel 1 is similar to the relationship between the ratchet and the pawl. When the clutch pawl 6 locks the center wheel 1 under the action of the linkage 7, the transmission operates at a speed ratio, and when the clutch pawl 6 is disengaged from the center wheel 1 by the linkage 7, the transmission is another Speed ratio work.

The shifting gear 8 and the toggle lever 4 drive the control block 3 to rotate. For the sake of clarity, in Figs. 1 to 4, the dial gear 8 and the toggle lever 4 are schematic views, and Fig. 5 is an enlarged view of the actually used shifting gear 8 (partial) and the toggle lever 4.

The principle of operation of the reverse shift control mechanism of the present invention is as follows: Figure 1 shows the position of the rightmost end of the toggle lever 4 when the input shaft is rotated in the forward direction. It is assumed that the clutch pawl 6 is disengaged from the center wheel 1 at this time, the center wheel 1 can be rotated, and the spiral spring 2 is in a stretched state. The transmission operates at a speed ratio. At this time, if the input axis is reversed, the speed ratio can be changed.

A restoring spring (not shown) is mounted on the toggle lever 4, and under the action of the return spring, regardless of the position of the toggle lever 4 at the right end or the left end, the force of the spring always attempts to pull the toggle lever 4 To the middle position. Therefore, in the position of Fig. 1, when the input shaft is reversed, the toggle lever 4 is initially swung to the left by the return spring. The toggle gear 8 rotates as the input shaft rotates, and after the toggle lever 4 is rotated to the left by a small angle, it The incomplete gear meshes with the toggle gear 8. The toggle gear 8 drives the toggle lever 4 to continue to rotate to the left. The toggle lever 4 drives the control block 3 to rotate around the central axis of the control block 3, and the control block 3 is disengaged from the linkage 7. The linkage 7 is rotated about the axis of the center wheel 1 by the action of the helical spring 2, and the five clutch jaws 6 are rotated about their respective axes of rotation during the rotation. When the control block 3 is rotated through 90° (reversed by about 30°), the clutch pawl 6 locks the center wheel 1 (see Fig. 2), and the transmission is in another speed ratio state.

Since the toggle lever 4 is an incomplete gear, as long as the reverse angle is greater than 30°, the toggle lever 4 is no longer rotated, and the angle at which the control block 3 is rotated is 90°.

The configuration of the toggle lever 4 and the action of the compression spring 5 determine that the toggle lever 4 can only rotate the control block 3 when it is reversed. When the input shaft rotates in the forward direction, the toggle lever does not drive the control block 3 to rotate. However, when the input shaft rotates in the forward direction, under the action of the return spring and the shifting gear 8, the toggle lever 4 will return to the position shown in Fig. 1, and wait for the next reverse to shift again, as shown in Fig. 3. Show. At this time, if it is reversed, the shifting gear 8 drives the toggle lever 4 and the control block 3 to rotate to disengage the clutch pawl 6 from the center wheel 1, as shown in Fig. 4, to achieve another shifting. At this time, the spiral spring 2 is again in a stretched state.

The position shown in Fig. 4 is further rotated in the forward direction, and the control mechanism returns to the state shown in Fig. 1.

Figure 5 shows the tooth profile and the mating relationship of the toggle gear 8 and the toggle lever 4.

In summary, the reverse shift control mechanism of the present invention uses an incomplete gear to perform an action by reversing the input shaft. As long as the input shaft is reversed once, the speed ratio of the transmission is changed once, which is convenient for control, and the structure is simple and reliable.

The structure and principles of the present invention are illustrated above by a transmission of a planetary gear train. It will be appreciated by those skilled in the art that not only is a reverse shifting mechanism described herein, but also a principle of reverse shifting, and the illustrated shifting mechanism is not limiting of the invention. Any variation of the above embodiments will be within the scope of the claims of the present invention as long as the inversion or control block rotation control shift is achieved with an incomplete gear.

Claims

Rights request

A reverse shifting control mechanism, comprising a center wheel (1) of a planetary gear train of a transmission, characterized in that: the mechanism further comprises a toggle lever (4), a control block (3), and a compression spring ( 5), linkage (7), several clutch claws (6), toggle gear (8) and spiral spring (2), wherein the linkage (7) and the shifting gear (8) are arranged on the center wheel (1) Axis of ;

The linkage (7) is provided with a groove, and a toggle lever (4) and a control block (3) connected to the toggle lever (4) are disposed in the groove;

The toggle gear (8) and the toggle lever (4) drive the control block (3) to rotate, and the compression spring (5) is pressed on the toggle lever (4) and the control block (3), and the toggle lever (4) One end is an incomplete gear. When the input shaft rotates in the reverse direction, the other end of the toggle lever (4) drives the control block (3) to rotate. When the input shaft rotates in the forward direction, the toggle lever (4) returns to the starting position and does not Will drive the control block (3) to rotate;

The clutch pawl (6) is disposed on an outer circumference of the center wheel (1), and the clutch pawl (6) is meshably coupled to the teeth of the center wheel (1);

The spiral spring (2) is disposed on the linkage (7), and the linkage (7) rotates around the axis of the center wheel (1) under the action of the spiral spring (2);

The mechanism drives the control block (3) to rotate by the toggle gear (8) and the toggle lever (4), and the control block (3) drives the several clutch jaws (6) to rotate by the linkage member (7), and the clutch pawl ( 6) Lock or release the center wheel (1) of the transmission to achieve shifting;

When the clutch pawl (6) locks the center wheel (1) under the action of the linkage (7), the transmission operates at a speed ratio, when the clutch pawl (6) is acted upon by the linkage (7) and the center wheel (1) When disengaged, the transmission operates at another speed ratio.

2. The reverse shift control mechanism according to claim 1, wherein the linkage (7) has two relatively fixed positions, one of which is a position corresponding to the locking of the center wheel (1), The position is that the linkage (7) drives the clutch pawl (6) to lock the center wheel (1) under the action of the helical spring (2), and the other position is the control block (3). The rotation drives the linkage (7) to move. , the position where the clutch pawl (6) is disengaged from the center wheel (1).

3. The reverse shift control mechanism according to claim 1, wherein said spiral spring (2) There are several, several spiral springs (2) are placed on the outer edge of the linkage (7).