TWI531507B - Bicycle front tooth plate transmission device - Google Patents

Description

Modulation device for bicycle front gear transmission

The present invention relates to a bicycle shifting device, and more particularly to a shifting device for a bicycle front sprocket wheel transmission.

The inventor of the present invention made a creative improvement for the bicycle front-toothed disc transmission, and filed a patent application, which is patent application No. 102204515, which is a transmission using a planetary gear system as a bicycle front-toothed disc, which is a crank of a bicycle. A control rod is disposed in the shaft, and the two ends of the control rod protrude out of the crank shaft, and the user uses the inner side of the sole to kick the control rod to shift, thereby driving the planetary gear system to shift.

It is not convenient to use the above-mentioned speed change mode. It is different from the general public's usage habits. How to improve the existing equipment to conform to the general public's usage habits has become a target to be overcome.

SUMMARY OF THE INVENTION A primary object of the present invention is to provide a modulation device for a bicycle front-toothed disc transmission that operates in accordance with the general public's usage habits.

In order to achieve the above object, a modulation device for a bicycle front-toothed disc transmission according to the present invention includes: a tubular outer casing; a crank shaft pivotally disposed in the tubular outer casing, the two ends projecting the tubular shape Outside the outer casing, a central shaft is provided with a shaft hole along the axial line, and the exposed end of the left side is provided with an elongated slot in the radial direction; a planetary gear shifting device is mounted on the exposed end of the right side of the crank shaft and is driven by the crank shaft. Rotating; a control rod is received in the shaft hole of the crank shaft for controlling the speed change of the planetary gear shifting device; a lever is disposed at one end of the control rod and accommodated in the elongated shape of the crank shaft In the slot, the two ends protrude out of the elongated slot and rotate synchronously with the crankshaft; a shifting ring is mounted on the exposed end of the left side of the crankshaft, and does not rotate with the crankshaft, the shifting ring and the shifting ring The lever is connected to allow the lever to rotate freely, and the lever can be driven along the elongated slot Displacement, the outer ring surface of the shifting ring is provided with at least one guiding groove; at least one guiding pin is fixed to the tubular outer casing and received in the guiding groove of the shifting ring; The tubular outer casing is located outside the shifting ring, can be pulled by an external force and rotated by a set angle, and the shifting ring is synchronously rotated in parallel; when the shifting ring rotates, it is axially displaced by the guiding of the guiding pin. And driving the lever to move the lever to shift. With the above device, the user can use the existing cable pulling device to pull the traction plate to interlock the shifting ring to drive the shifting lever, thereby interlocking the control rod to drive the planetary gear shifting device, due to the use of the existing steel cable Pulling the shifting device, in the same way as the existing one, will be more suitable for the user's needs.

(10)‧‧‧Tubular casing

(12)‧‧‧ External thread

(20)‧‧‧ crankshaft

(21)‧‧‧Axis hole

(22)‧‧‧Long slot

(23)‧‧‧ External thread

(30)‧‧‧ planetary gear shifting device

(40)‧‧‧Control lever

(41) ‧‧‧ shaft

(42) ‧ ‧ headpieces

(43) ‧‧‧Perforation

(44) ‧‧‧ accommodating slots

(45) ‧ ‧ steel balls

(46) ‧ ‧ spring

(50)‧‧‧ 杆

(60) ‧ ‧ shifting ring

(61) ‧‧‧ guiding slots

(62) ‧‧‧ Ring groove

(63) ‧‧‧ Groove

(70) ‧ ‧ guide pin

(80)‧‧‧ traction disk

(81)‧‧‧ Cover

(82) ‧ ‧ ‧ frame

(83)‧‧‧ Guide column

(84)‧‧‧ Ring groove

(85) ‧‧‧ Groove

(90)‧‧‧Latch ring

(91)‧‧‧ Shoulder

(92)‧‧‧ internal thread

(100) ‧ ‧ lining ring

(101)‧‧‧ internal thread

(110)‧‧‧Return spring

(120)‧‧‧Steel cable

(130) ‧ ‧ fixed ring

(131)‧‧‧

(140)‧‧‧Tangle ring

1 is an external perspective view of the present invention; FIG. 2 is an exploded perspective view of a left side portion in FIG. 1; FIG. 3 is a view showing a conversion direction of FIG. 2; FIG. 4 is a top view of FIG. 4 is a cross-sectional view taken along line 5-5; FIG. 6 is a cross-sectional view taken along line 6-6 of FIG. 4; and FIG. 7 is an enlarged view of the shifting ring of reference numeral 60 in FIG. 2; FIG. FIG. 9 is a cross-sectional view taken along line 8-8 of FIG. 4; FIG. 9 is an enlarged view of a circled portion in FIG. 8; FIG. 9A is a positional view of a local element corresponding to the position of FIG. 9; Fig. 10 is a view similar to Fig. 9 showing only the state in which the shift lever 50 is moved from the right side of the elongated slot 22 to the left side; Fig. 10A is a positional view of the local component corresponding to the position of Fig. 10.

In order to explain the features and functions of the present invention, an embodiment will be described in detail below with reference to the drawings.

Referring to FIG. 1 to FIG. 10A, a modulation device for a bicycle front-toothed disc transmission includes:

A tubular outer casing (10).

a crank shaft (20) pivotally disposed in the tubular outer casing (10) Outside the tubular casing (10), a shaft hole (21) is arranged along the axial center of the tubular casing (10), and an elongated slot (22) is radially provided at the exposed end of the left side.

A planetary gear shifting device (30) is mounted on the exposed end of the right side of the crankshaft (20) and is rotated by the crankshaft (20). As shown in Figures 1 and 8, the detailed structure of this part is Refer to the previous case of 102204515.

A control rod (40) is received in the shaft hole (21) of the crank shaft (20) for controlling the shifting of the planetary gear shifting device (30).

a lever (50) is disposed at one end of the lever (40) and received in the elongated slot (22) of the crankshaft (20), the two ends of which protrude from the elongated slot ( 22) In addition, the crank shaft (20) rotates synchronously.

Wherein, the control rod (40) comprises a shaft body (41) and a head end piece (42), the head end piece (42) is provided with a through hole (43) for the rod (50) to be pierced, the head end piece The inside of (42) is provided with a receiving groove (44), which is provided with a steel ball (45) and a spring (46), and the steel ball (45) is pressed against the lever by the thrust of the spring (46). ), as shown in Figures 2, 3, and 9.

a shifting ring (60) is mounted on the left exposed end of the crankshaft (20) and does not rotate with the crankshaft (20). The shifting ring (60) is coupled to the lever (50) to allow the shifting lever (50) freely rotating, and can drive the lever (50) to be displaced along the elongated slot (22), the outer ring surface of the shifting ring (60) is provided with at least one guiding slot (61), such as As shown in Fig. 7, this embodiment provides two guiding grooves.

Wherein, the inner surface of the shifting ring (60) is provided with a ring groove (62), and the two protruding ends of the lever (50) are received in the ring groove (62), as shown in Figures 7 and 9. .

At least one guiding pin (70) is fixed to the tubular casing (10) and received in the guiding groove (61) of the shifting ring (60). As shown in FIG. 6, the embodiment is provided with two Guide pin.

A traction disk (80), as shown in Figures 1 and 8, is disposed on the outer side of the shifting ring (60) on the tubular casing (10), can be pulled by an external force and rotated by a set angle, and the shifting is performed in parallel The ring (60) rotates synchronously; when the shifting ring (60) rotates, it is axially displaced by the guiding of the guiding pin (70), and drives the lever (50) to interlock the lever (40). Shift, as shown in Figures 9 and 10.

The traction plate (80) is composed of a cover body (81) and a frame body (82), and the two guide columns (83) are disposed on the cover body (81), such as the second and third As shown, the outer ring surface of the traction disk (80) is provided with a recess (85) for receiving the towed cable (120).

Wherein, the inner side of the traction disk (80) is provided with two guiding columns (83), as shown in Fig. 3, and the shifting ring (60) is provided with two grooves (63) for the two guiding columns (83). The housing, as shown in Fig. 6, can be reciprocally displaced along the guide post (83) as shown in Figs.

Further included therein is a latch ring (90), as shown in Figures 2, 3, and 9, attached to the tubular housing (10), the shifting ring (60) being received in the latch ring (90) The guide pin (70) is fixed to the pin ring (90), and the pin ring (90) is locked with an internal thread (92) on the external thread (12) of the tubular casing (10).

Wherein, the outer ring surface of the bolt ring (90) is convexly provided with a shoulder portion (91), and the traction plate (80) is provided with a ring groove (84) for receiving the shoulder portion of the latch ring (90). (91), as shown in Figure 9.

The inner side of the shifting ring (60) is further provided with a backing ring (100). As shown in Figures 2, 3 and 9, the backing ring (100) is fixed on the crank shaft (20), the backing ring ( 100) is secured to the external thread (23) of the crankshaft (20) by its internal thread (101).

There is further included a return spring (110) having one end fixed directly or indirectly to the tubular casing (10) and the other end of which is fixed to the traction plate (80). One end of the spring (110) is fixed to a protrusion (131) of a fixing ring (130), and the other end is fixed to the frame body (82) of the traction disk (80) as shown in Fig. 5. In addition, the retaining ring (130) is forced by a tapered ring (140) as shown in FIG.

In use, as shown in Figures 9, 9A, 10, and 10A, the traction disk (80) is pulled by the cable (120), and the traction disk (80) is rotated from the position shown in Figs. 9 and 9A to Fig. 10. 10A, at this time, the traction disk (80) is synchronously rotated with the shifting ring (60), and the shifting ring (60) is guided by the guiding pin (70) and its guiding groove (61). Acting, the axial displacement is generated while rotating, that is, from the position of FIG. 9 to the position of FIG. 10, the shifting ring (60) drives the shifting lever (50) to move, and the control lever is moved in parallel (40). The displacement of the lever (40) controls the effect of the planetary gear device (30) to produce a shifting speed. The traction disk (80) also rotates the spring (110) and stores an elastic release force. When the cable (120) is relaxed, the spring (110) pulls the traction disk ( 80) Automatically returning to the initial position, and moving the lever (50) in parallel to shift the lever (40) back to the initial position, i.e., moving back to the position of FIG. 9 from the present invention.

(10)‧‧‧Tubular casing

(20)‧‧‧ crankshaft

(21)‧‧‧Axis hole

(22)‧‧‧Long slot

(30)‧‧‧ planetary gear shifting device

(40)‧‧‧Control lever

(45) ‧ ‧ steel balls

(46) ‧ ‧ spring

(50)‧‧‧ 杆

(60) ‧ ‧ shifting ring

(80)‧‧‧ traction disk

(81)‧‧‧ Cover

(82) ‧ ‧ ‧ frame

(83)‧‧‧ Guide column

(84)‧‧‧ Ring groove

(85) ‧‧‧ Groove

(90)‧‧‧Latch ring

(91)‧‧‧ Shoulder

(100) ‧ ‧ lining ring

(110)‧‧‧Return spring

(130) ‧ ‧ fixed ring

(140)‧‧‧Tangle ring

Claims (10)

The invention relates to a modulation device for a bicycle front-toothed disc transmission, comprising: a tubular outer casing; a crank shaft pivotally disposed in the tubular outer casing, the two ends projecting out of the tubular outer casing, and the center thereof is provided with an axis along the axial line a hole, the left end of the exposed end is provided with an elongated slot in the radial direction; a planetary gear shifting device is mounted on the right end of the crank shaft and is rotated by the crank shaft; a lever is received in the crank a shaft hole of the shaft is used for controlling the speed change of the planetary gear shifting device; a lever is disposed at one end of the control rod and received in the elongated slot of the crank shaft, and the two ends protrude from the long length Outside the slotted hole, synchronously rotates with the crankshaft; a shifting ring is mounted on the exposed end of the left side of the crankshaft, and does not rotate with the crankshaft, and the shifting ring is connected with the lever to allow the lever to rotate freely. And driving the lever along the elongated slot, the outer ring surface of the shifting ring is provided with at least one guiding slot; at least one guiding pin fixed to the tubular housing and received in the shifting ring a guiding groove; a traction disk, located in the tubular casing and located in the change The outer side of the ring can be rotated by a force to rotate a set angle, and the shifting ring is synchronously rotated in parallel; when the shifting ring rotates, the guide pin guides to axially shift, and drives the lever to interlock The lever is shifted. The modulating device for a bicycle sprocket wheel transmission according to the first aspect of the invention, wherein the inner surface of the shifting ring is provided with a ring groove, and the two protruding ends of the lever are received in the ring groove. The modulating device for a bicycle sprocket wheel transmission according to claim 1, further comprising a latch ring fixed to the tubular housing, the shifting ring being received in the latch ring, the guiding The pin is fixed to the pin ring. The modulating device for a bicycle sprocket wheel transmission according to the first aspect of the invention, wherein the inner side of the shifting ring is further provided with a lining ring, and the lining ring is fixed on the crank shaft. The modulating device for a bicycle sprocket wheel transmission according to the first aspect of the invention, wherein the inner side of the traction plate is provided with two guide columns, and the shift ring is provided with two grooves for receiving the two guide columns. The shifting ring is reciprocally displaceable along the guide post. The modulating device for a bicycle front sprocket wheel transmission according to the third aspect of the invention, wherein the outer ring surface of the bolt ring protrudes with a shoulder portion, and the traction disk is provided with a ring groove for accommodating The shoulder of the pin ring. The modulating device for a bicycle front sprocket wheel transmission according to claim 5, wherein the traction plate is composed of a cover body and a frame right and left, and the two guide posts are disposed on the cover body, the traction The outer ring surface of the disc is provided with a recess for receiving the towed steel cable. The modulating device for a bicycle front sprocket wheel transmission according to claim 1, further comprising a return spring, one end of the spring being directly or indirectly fixed to the tubular outer casing, and the other end of which is fixed to the traction plate . The modulating device for a bicycle front sprocket wheel transmission according to the first aspect of the invention, wherein the control lever comprises a shaft body and a head end member, the head end member is provided with a through hole for the rod to be pierced, the head end piece The inside of the device is provided with a receiving groove, which is provided with a steel ball and a spring, and the steel ball is pressed against the lever by the thrust of the spring. A modulating device for a bicycle sprocket wheel transmission according to the invention of claim 8, wherein one end of the spring is fixed to a fixing ring, and the fixing ring is further fixed to the tubular casing.