CN106985959B - Bicycle front derailleur - Google Patents
Bicycle front derailleur Download PDFInfo
- Publication number
- CN106985959B CN106985959B CN201710194742.6A CN201710194742A CN106985959B CN 106985959 B CN106985959 B CN 106985959B CN 201710194742 A CN201710194742 A CN 201710194742A CN 106985959 B CN106985959 B CN 106985959B
- Authority
- CN
- China
- Prior art keywords
- lining
- front derailleur
- hinged
- bicycle front
- connecting rod
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62M—RIDER PROPULSION OF WHEELED VEHICLES OR SLEDGES; POWERED PROPULSION OF SLEDGES OR SINGLE-TRACK CYCLES; TRANSMISSIONS SPECIALLY ADAPTED FOR SUCH VEHICLES
- B62M9/00—Transmissions characterised by use of an endless chain, belt, or the like
- B62M9/04—Transmissions characterised by use of an endless chain, belt, or the like of changeable ratio
- B62M9/06—Transmissions characterised by use of an endless chain, belt, or the like of changeable ratio using a single chain, belt, or the like
- B62M9/10—Transmissions characterised by use of an endless chain, belt, or the like of changeable ratio using a single chain, belt, or the like involving different-sized wheels, e.g. rear sprocket chain wheels selectively engaged by the chain, belt, or the like
- B62M9/12—Transmissions characterised by use of an endless chain, belt, or the like of changeable ratio using a single chain, belt, or the like involving different-sized wheels, e.g. rear sprocket chain wheels selectively engaged by the chain, belt, or the like the chain, belt, or the like being laterally shiftable, e.g. using a rear derailleur
- B62M9/131—Front derailleurs
- B62M9/134—Mechanisms for shifting laterally
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62M—RIDER PROPULSION OF WHEELED VEHICLES OR SLEDGES; POWERED PROPULSION OF SLEDGES OR SINGLE-TRACK CYCLES; TRANSMISSIONS SPECIALLY ADAPTED FOR SUCH VEHICLES
- B62M9/00—Transmissions characterised by use of an endless chain, belt, or the like
- B62M9/04—Transmissions characterised by use of an endless chain, belt, or the like of changeable ratio
- B62M9/06—Transmissions characterised by use of an endless chain, belt, or the like of changeable ratio using a single chain, belt, or the like
- B62M9/10—Transmissions characterised by use of an endless chain, belt, or the like of changeable ratio using a single chain, belt, or the like involving different-sized wheels, e.g. rear sprocket chain wheels selectively engaged by the chain, belt, or the like
- B62M9/12—Transmissions characterised by use of an endless chain, belt, or the like of changeable ratio using a single chain, belt, or the like involving different-sized wheels, e.g. rear sprocket chain wheels selectively engaged by the chain, belt, or the like the chain, belt, or the like being laterally shiftable, e.g. using a rear derailleur
- B62M9/131—Front derailleurs
- B62M9/134—Mechanisms for shifting laterally
- B62M9/1342—Mechanisms for shifting laterally characterised by the linkage mechanisms
Abstract
The invention provides a bicycle front derailleur, which comprises a base, an inner side connecting rod, an outer side connecting rod and a chain guide piece, wherein the base, the inner side connecting rod, the outer side connecting rod and the chain guide piece are mutually hinged; the clamping assembly further comprises a first lining part and a second lining part, the first lining part is hinged with the fixed part, and the second lining part is hinged with the movable part. The first inner surface of the first lining part and the second inner surface of the second lining part are arranged oppositely in the clamping channel. After the clamping assembly clamps the vertical pipe of the frame, the first lining part and the second lining part are abutted to the vertical pipe, and the first lining part and the second lining part are respectively in rotating fit with the fixed part and the movable part, so that the first lining part and the second lining part have rotating freedom relative to the fixed part and the movable part, the angle of the base is adjusted first, the clamping assembly is locked afterwards, the mounting angle of the front derailleur is controlled, and the function of the front derailleur is guaranteed not to be affected.
Description
Technical Field
The present invention relates to a bicycle front derailleur, and more particularly, to a bicycle front derailleur with a controllable mounting angle.
Background
The existing bicycle front derailleur comprises a base and a chain guide part which is connected to the base in a rotating mode through an inner connecting rod and an outer connecting rod to form a swing rod, the extending tail end of a shifting wire is fixed to the inner connecting rod, the outer connecting rod or the chain guide part, the length of the shifting wire changes, the shifting wire generates traction force or pushing force to the inner connecting rod, the outer connecting rod or the chain guide part, the chain guide part swings directionally, a chain penetrating through the chain guide part is guided to the other horizontal position, the chain penetrates through the chain guide part to be loosened and matched with the other chain wheel, and gear shifting is achieved.
Wherein, be provided with the centre gripping subassembly on the base, the centre gripping subassembly include with base relatively fixed part and movable part, the first end of fixed part rotates with the first end of movable part to be connected, the second end of fixed part and the second end of movable part are held through the bolt and are realized dismantling the connection, form the centre gripping way between fixed part and the movable part, the bicycle front derailleur pass through the centre gripping subassembly centre gripping with on the frame of bicycle.
The problem with the prior art bicycle front derailleur is that because the clamping assembly is fixed relative to the base, the bicycle front derailleur remains fixed relative to the frame after the bicycle front derailleur is mounted to the frame by the clamping assembly. However, due to manufacturing errors or different models of the frames, the seat tube of the frame may have an angular difference, and the front derailleur may have an angular deviation after being mounted to the seat tube, which may affect the functionality of the front derailleur.
Disclosure of Invention
The present invention is directed to a bicycle front derailleur with a controllable mounting angle.
The invention provides a bicycle front derailleur, which comprises a base, an inner side connecting rod, an outer side connecting rod and a chain guide piece, wherein the inner side connecting rod is hinged with the base, the inner side connecting rod is hinged with the chain guide piece, the outer side connecting rod is hinged with the base, and the outer side connecting rod is hinged with the chain guide piece; the clamping assembly is arranged on the base and comprises a fixed part and a movable part, the first end of the movable part is hinged to the first end of the fixed part, the second end of the movable part and the second end of the fixed part are locked through a bolt, and a clamping channel is formed between the movable part and the fixed part; the clamping assembly further comprises a first lining piece and a second lining piece, the first lining piece and the fixed part are hinged to the first rotating shaft, and the second lining piece and the movable part are hinged to the second rotating shaft; the first rotating shaft and the second rotating shaft are parallel to each other, and the first rotating shaft is vertical to the extending direction of the clamping channel; the first inner surface of the first lining part and the second inner surface of the second lining part are arranged oppositely in the clamping channel.
According to the scheme, after the clamping assembly clamps the vertical pipe of the frame, the first lining part and the second lining part are abutted to the vertical pipe, the first lining part and the second lining part are respectively in rotating fit with the fixed part and the movable part, the first lining part and the second lining part have rotating freedom degrees relative to the fixed part and the movable part, the angle of the base is adjusted firstly, and then the clamping assembly is locked to control the installation angle of the front derailleur, so that the function of the front derailleur is not affected.
The clamping assembly further comprises an adjusting bolt; the adjusting bolt penetrates through the threaded through hole of the movable part and abuts against the second lining part or the adjusting bolt penetrates through the fixed part and abuts against the first lining part.
Therefore, the first lining piece and the second lining piece can be further clamped relative to the opposite pipe of the fixed part and the movable part, and the stability is improved.
In a further embodiment, the adjusting screw abuts against the first hinge of the first lining part or the second hinge of the second lining part.
As can be seen, when the adjustment bolt abuts the first hinge portion of the first liner member or the second hinge portion of the second liner member, the rotation of the first and second liner members is more directly limited, further ensuring stable mounting of the front derailleur.
Further, the first rotating shaft is parallel to a hinge shaft between the base and the inner link.
As can be seen, the adjustment of the front derailleur by the first and second inner liners is for the adjustment of the raise angle and height of the derailleur.
Further, the connecting line of the first hinge part and the second hinge part passes through the center of the clamping channel.
It can be seen from above that, the first interior lining piece and the interior lining piece combined action of second carry out the centre gripping to the riser, and the effort of first interior lining piece and interior lining piece to the riser all points to the center department of riser simultaneously, guarantees that the clamping-force of riser both sides is relative and forms the force balance state, has further improved the installation accuracy of bicycle front derailleur.
The further scheme is that the fixed part is hinged at the symmetrical center of the first lining part, and the movable part is hinged at the symmetrical center of the second lining part.
Further, the first lining member is located between the upper end surface and the lower end surface of the fixed portion, and the second lining member is located between the upper end surface and the lower end surface of the movable portion.
As can be seen, the first and second lining members do not interfere with the movement of the fixed and movable portions.
Further, the fixing part and the base are integrally formed.
Therefore, the fixing part and the base are integrally formed, so that the position precision between the chain guide piece and the vertical pipe can be improved.
In a further aspect, the first inner surface of the first lining member and the second inner surface of the second lining member are located on the same circumferential surface.
Therefore, the first lining part and the second lining part are better in matching stability with the stand pipe.
In a further aspect, the first lining element is made of metal, plastic or ceramic, and the second lining element is made of metal, plastic or ceramic.
Drawings
FIG. 1 is a block diagram of an embodiment of the bicycle front derailleur in accordance with the present invention.
FIG. 2 is an exploded view of the embodiment of the bicycle front derailleur in accordance with the present invention.
FIG. 3 is a block diagram of the clamping assembly in the embodiment of the bicycle front derailleur in accordance with the present invention.
FIG. 4 is an exploded view of the clamping assembly in the embodiment of the bicycle front derailleur in accordance with the present invention.
FIG. 5 is a schematic view of a first state of the embodiment of the bicycle front derailleur in accordance with the present invention.
FIG. 6 is a schematic view of a second state of the bicycle front derailleur embodiment in accordance with the present invention.
The invention is further explained with reference to the drawings and the embodiments.
Detailed Description
Referring to FIG. 1, FIG. 1 is a block diagram of an embodiment of a bicycle front derailleur in accordance with the present invention. The bicycle front derailleur is mounted on a vertical pipe on a frame and used for switching the position of a chain matched on a front chain wheel set to realize gear shifting. The bicycle front derailleur comprises a base 1, an outer side connecting rod 2, an inner side connecting rod (not shown in the figure) and a chain guide piece, wherein a clamping assembly 100 is arranged on the base 1, a clamping channel 101 is arranged in the middle of the clamping assembly 100, the clamping channel 101 is a containing position of a vertical pipe, and the bicycle front derailleur can be fixed on the vertical pipe of a frame through the clamping assembly 100 of the base 1. The chain guide 4 is provided with a sprocket slot 43, and the chain passes through the sprocket slot 43.
Referring to FIG. 2, FIG. 2 is an exploded view of the embodiment of the bicycle front derailleur in accordance with the present invention. The base 1 is provided with a hinge point 11 and a hinge point 12, the outside link 2 is provided with a hinge point 21 and a hinge point 22, the inside link 3 is provided with a hinge point 31 and a hinge point 32, and the chain guide 4 is provided with a hinge point 41 and a hinge point 42. Base 1 and outside link 2 are articulated through the cooperation between hinge point 11 and hinge point 21, and base 1 and outside link 3 are articulated through the cooperation between hinge point 12 and hinge point 31. The hinge between the outer link 2 and the chain guide 4 is achieved by the cooperation between the hinge point 22 and the hinge point 41. The inner link 3 and the chain guide 4 are hinged by the cooperation between the hinge point 32 and the hinge point 42, and a planar rocker mechanism is formed among the base 1, the inner link 3, the outer link 2 and the chain guide 4. Establish the installation department of replacement gear line at inboard connecting rod 3, outside connecting rod 2 or chain guide 4, will shift gears the line and install the installation department after, the selector is taken out tight or the propelling movement then can form the directional swing of chain guide 4 to the gear line, alternates and receives the guide effect at the chain of dialling in chain groove 43, breaks away from behind the first sprocket of former complex, removes to second sprocket place, at last with the cooperation of second sprocket, and then realizes shifting.
Referring to FIG. 3, FIG. 3 is a block diagram of a clamping assembly in an embodiment of the bicycle front derailleur in accordance with the present invention. The clamping component 100 comprises a fixed part 110 and a movable part 120, the fixed part 110 and the base 1 are integrally formed, the fixed part 110 and the movable part 120 are both semi-ring-shaped, a first end of the fixed part 110 and a first end of the movable part 120 are hinged to a hinge joint 103, a second end of the fixed part 110 is provided with a threaded matching hole 171, a second end of the movable part is provided with a threaded matching hole 172, and the fixed part 110 and the movable part 120 are locked by a locking nut after passing through the threaded matching hole 171 and the threaded matching hole 172 through bolts. Since the fixed part 110 and the movable part 120 are semi-annular, a clamping channel 101 having an arc-shaped inner circumferential surface is formed between the fixed part 110 and the movable part 120, and the section of the clamping channel 101 is substantially circular.
Referring to FIG. 4, FIG. 4 is an exploded view of the clamping assembly in the embodiment of the bicycle front derailleur in accordance with the present invention. The clamping assembly includes a fixed portion 110, a movable portion 120, a first liner 130, and a second liner 140. The first lining member 130 and the second lining member 140 are made of metal, plastic or ceramic, the first lining member 130 and the second lining member 140 are semi-annular, the first lining member 130 has a first inner surface 131, the first inner surface 131 is an arc surface, and the second inner surface 141 of the second lining member 140 is an arc surface. The inner surface 112 of the fixing portion 110 is provided with a first mounting position 111, two sides of the first mounting position 111 are provided with pin holes, the outer surface of the first lining member 130 is provided with a first hinge portion 132 located at the symmetric center thereof, after the first hinge portion 132 extends into the first mounting position 111, the first pin 161 passes through the pin holes and passes through the first hinge portion 132, so that the first lining member 130 is hinged on the fixing portion 110. Correspondingly, the inner surface 122 of the movable portion 120 is provided with a second mounting position 121 located at the symmetric center thereof, pin holes are provided at two sides inside the second mounting position 121, a second hinge portion 142 is provided on the outer surface of the second lining member 140, and after the second hinge portion 142 extends into the second mounting position 121, the second pin 162 passes through the pin hole and passes through the second hinge portion 142, so that the second lining member 140 is hinged to the movable portion 120. The movable portion 120 is provided with a threaded through hole through which the adjusting bolt 150 can pass to reach the second mounting location 121.
Referring to FIGS. 5 and 6, FIG. 5 is a schematic view of a first state of the bicycle front derailleur embodiment of the present invention, and FIG. 6 is a schematic view of a second state of the bicycle front derailleur embodiment of the present invention. When the bicycle front derailleur is mounted to the seat tube 500, the clamping assembly 100 clamps the seat tube 500 such that the bicycle front derailleur is fixed. The clamping assembly 100 is in a first clamping state, and the riser 500 is parallel to the extending direction of the clamping channel 101. At this time, the fixed portion 110 and the movable portion 120 are locked by the bolt, the adjusting bolt 150 is locked and pressed against the second hinge portion 142 of the second lining member 140, under the locking force of the adjusting bolt 150, the first inner surface 131 of the first lining member 130 and the second inner surface 141 of the second lining member 140 which are oppositely arranged in the clamping channel 101 are located at the same circumferential surface and abut against the circumferential wall of the stand pipe 500, the first pin 161 is located at a first rotation axis, the second pin 162 is located at a second rotation axis, the first rotation axis and the second rotation axis are parallel to each other, the first rotation axis is parallel to a hinge axis (shown in fig. 2) between the base 1 and the inner connecting rod 3, the first rotation axis is parallel to the second rotation axis, and a connecting line of the first hinge portion 132 and the second hinge portion 142 passes through the center of the clamping channel 101 (shown in fig. 2), that is, the acting forces of the first lining member 130 and the second lining member 140 on the stand pipe 500 are opposite in directions and interact with each other to form a force balance state on the stand pipe, firmly clamping the riser 500.
In this state, in order to ensure that the first and second lining members 130 and 140 do not interfere with the movement of the fixed portion 110 and the movable portion 120, the first lining member 130 is located between the upper end surface and the lower end surface of the fixed portion 110, and the second lining member 140 is located between the upper end surface and the lower end surface of the movable portion 120.
When the clamping angle needs to be adjusted, the adjusting bolt 150 is first twisted to release the contact between the adjusting bolt 150 and the second lining member 140, and simultaneously the locking between the movable portion 120 and the fixed portion 110 is released, so that the first lining member 130 and the second lining member 140 have only rotational freedom with respect to the fixed portion 110 and the movable portion 120. When the fixed portion 110 and the movable portion 120 rotate counterclockwise (counterclockwise in the drawing), the first lining member 130 and the second lining member 140 maintain contact with the standpipe 500, while the fixed portion 110 rotates relative to the first lining member 130 about a first axis of rotation on which the first pin 161 is located, and the movable portion 120 rotates relative to the second lining member 140 about a second axis of rotation on which the second pin 162 is located. After the fixed part 110 and the movable part 120 reach the target positions, the adjusting bolt 150 is locked again, and thereafter the fixed part 110 and the movable part 120 are locked again to complete the installation of the bicycle front derailleur.
Due to the reasons of different manufacturing precision or models, on different frames, the vertical pipe has different inclination angles relative to the frames, and the first lining part and the second lining part which have rotational freedom degrees relative to the fixed part and the movable part are arranged to realize the adjustment of the mounting angle of the chain shifter, ensure that the working precision of the front chain shifter is ensured and the function is not influenced.
Finally, it should be emphasized that the above-mentioned embodiments are merely preferred embodiments of the present invention, and not intended to limit the present invention, and that various changes and modifications may be made by those skilled in the art, such as an adjusting bolt may be further disposed at the fixing portion abutting against the first lining member, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A bicycle front derailleur comprises a base, an inner connecting rod, an outer connecting rod and a chain guide, wherein the inner connecting rod is hinged with the base, the inner connecting rod is hinged with the chain guide, the outer connecting rod is hinged with the base, and the outer connecting rod is hinged with the chain guide;
the clamping assembly is arranged on the base and comprises a fixed part and a movable part, the first end of the movable part is hinged to the first end of the fixed part, the second end of the movable part and the second end of the fixed part are locked through a bolt, and a clamping channel is formed between the movable part and the fixed part;
the method is characterized in that:
the clamping assembly further comprises a first lining piece and a second lining piece, a first hinged part and the fixed part of the first lining piece are hinged to a first rotating shaft, and a second hinged part and the movable part of the second lining piece are hinged to a second rotating shaft;
the first rotating shaft and the second rotating shaft are parallel to each other, and the first rotating shaft is perpendicular to the extending direction of the clamping channel;
the first inner surface of the first lining part and the second inner surface of the second lining part are oppositely arranged in the clamping channel.
2. The bicycle front derailleur according to claim 1, wherein:
the clamping assembly further comprises an adjusting bolt;
the adjusting bolt penetrates through the threaded through hole of the movable part and abuts against the second lining part or the adjusting bolt penetrates through the fixed part and abuts against the first lining part.
3. The bicycle front derailleur according to claim 2, wherein:
the adjusting bolt abuts on the first hinge part or the second hinge part.
4. The bicycle front derailleur according to claim 3, wherein:
the first rotation shaft is parallel to a hinge shaft between the base and the inner link.
5. The bicycle front derailleur according to claim 4, wherein:
the connecting line of the first hinge part and the second hinge part passes through the center of the clamping channel.
6. The bicycle front derailleur according to claim 5, wherein:
the fixed part is hinged to the symmetrical center of the first lining part, and the movable part is hinged to the symmetrical center of the second lining part.
7. The bicycle front derailleur according to claim 3, wherein:
the first lining member is located between the upper end surface and the lower end surface of the fixed portion, and the second lining member is located between the upper end surface and the lower end surface of the movable portion.
8. The bicycle front derailleur according to claim 7, wherein:
the fixing part and the base are integrally formed.
9. The bicycle front derailleur according to claim 8, wherein:
the first inner surface of the first lining member and the second inner surface of the second lining member are located on the same circumferential surface.
10. The bicycle front derailleur according to any one of claims 1-9, wherein:
the first lining part is made of metal, plastic or ceramic, and the second lining part is made of metal, plastic or ceramic.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710194742.6A CN106985959B (en) | 2017-03-28 | 2017-03-28 | Bicycle front derailleur |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710194742.6A CN106985959B (en) | 2017-03-28 | 2017-03-28 | Bicycle front derailleur |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106985959A CN106985959A (en) | 2017-07-28 |
| CN106985959B true CN106985959B (en) | 2022-05-27 |
Family
ID=59412397
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710194742.6A Active CN106985959B (en) | 2017-03-28 | 2017-03-28 | Bicycle front derailleur |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106985959B (en) |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN106985959A (en) | 2017-07-28 |
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