CN216969908U - Chain expanding device and shared bicycle - Google Patents
Chain expanding device and shared bicycle Download PDFInfo
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- CN216969908U CN216969908U CN202123443293.5U CN202123443293U CN216969908U CN 216969908 U CN216969908 U CN 216969908U CN 202123443293 U CN202123443293 U CN 202123443293U CN 216969908 U CN216969908 U CN 216969908U
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- chain
- rocker arm
- guide rail
- base
- limiting
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Abstract
The application discloses chain expanding device and sharing bicycle. The chain expanding device comprises a base; the first end of the rocker arm is rotatably connected with the base, and an elastic part is arranged between the rocker arm and the base; a chain stay assembly rotatably connected to the second end of the rocker arm; under the state that the chain is placed on the chain support assembly, the elastic piece drives the chain support assembly to lift the chain through the rocker arm. This application can hold in the palm the chain that the subassembly lifted flagging part through the chain, makes the chain be in the state of tightening, avoids the chain to use the back flagging for a long time and the problem of interfering with other structures formation of bicycle.
Description
Technical Field
The application belongs to the technical field of shared vehicles, and particularly relates to a chain expanding device and a shared bicycle.
Background
In recent years, due to the fact that energy is saved, environment is protected, and the shared bicycle is convenient to go out, the shared bicycle becomes an important mode for people to go out, and great convenience is brought to people to go out. But after riding for a long time, the chain of sharing bicycle can produce deformation and be elongated, and the chain that is in chain drive structure downside this moment can hang down and form with chain cover or other structures and interfere, influences user's the experience of riding, can cause the incident even.
SUMMERY OF THE UTILITY MODEL
It is an object of the present application to provide an improved chain tensioner and a shared bicycle that at least addresses the problem of the chain sagging after prolonged use and interfering with other structures of the bicycle.
According to a first aspect of the present application, there is provided a chain tensioner, including:
a base;
the first end of the rocker arm is rotatably connected with the base, and an elastic part is arranged between the rocker arm and the base;
a chain stay assembly rotatably connected to the second end of the rocker arm;
under the state that the chain is placed on the chain support assembly, the elastic piece drives the chain support assembly to lift the chain through the rocker arm.
Optionally, the chain support assembly comprises a connecting piece and a guide rail, one end of the connecting piece is rotatably connected with the second end of the rocker arm, the other end of the connecting piece is fixedly connected with the guide rail, and a chain is placed on the guide rail.
Optionally, the connecting member and the guide rail define a limiting space for accommodating a chain.
Optionally, the connecting piece includes the supporting part, supporting part one end is buckled and is extended the fixed part, the guide rail includes bottom plate and lateral wall, the bottom plate is fixed to be set up on the fixed part, the lateral wall bottom plate with the supporting part encloses to establish and forms spacing space.
Optionally, along the length direction of the guide rail, the bearing surface of the guide rail bearing chain is a curved surface, and the bearing surface of the guide rail protrudes towards the direction in which the chain is located.
Optionally, along the length direction of the guide rail, a guide rib is arranged on the bearing surface of the guide rail bearing chain.
Optionally, the first end of the rocker arm has a limit bump, and when the rocker arm rotates to a predetermined angle, the limit bump abuts against the base.
Optionally, the base has a first limiting portion and a second limiting portion, when the rocker arm rotates to a first predetermined angle, the limiting projection abuts against the first limiting portion, and when the rocker arm rotates to a second predetermined angle, the limiting projection abuts against the second limiting portion;
the first limiting part and the second limiting part are respectively provided with a fixing hole for fixing the base.
Optionally, a receiving groove is formed in the first end of the rocker arm, and the first end of the rocker arm is connected with the base through a threaded connecting piece;
the elastic part comprises a torsional spring, the torsional spring is located in the accommodating groove, one end of the torsional spring is connected with the groove bottom of the accommodating groove, the other end of the torsional spring is connected with the base, and the threaded connecting piece penetrates through the torsional spring along the axial direction of the torsional spring.
According to a second aspect of the application, a shared bicycle is provided, which comprises a bicycle body, a chain transmission assembly and the chain expander, wherein the chain transmission assembly and the chain expander are fixedly arranged on the bicycle body, and the chain expander lifts a chain in the chain transmission assembly.
Optionally, the chain drive assembly further comprises a toothed disc and a flywheel, the chain is engaged with the toothed disc and the flywheel, and the chain expander is disposed adjacent to the toothed disc.
The utility model has the advantages of a technical effect lies in, can hold in the palm the chain that the subassembly lifted flagging part through the chain, makes the chain be in the state of tightening, avoids the chain to use the back flagging and form the problem of interfering with other structures of bicycle for a long time.
Other features of the present application and advantages thereof will become apparent from the following detailed description of exemplary embodiments thereof, which proceeds with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the application and together with the description, serve to explain the principles of the application.
FIG. 1 is an exploded view of a chain tensioner of the present application;
FIG. 2 is an isometric view of a chain tensioner of the present application;
FIG. 3 is a partial schematic view of the chain tensioner mounted to the body of the vehicle;
fig. 4 is a schematic view of the overall structure of the chain tensioner mounted to the vehicle body.
Reference numerals:
1. a base; 2. a rocker arm; 3. an elastic member; 4. a connecting member; 401. a support portion; 402. a fixed part; 5. a guide rail; 501. a base plate; 502. a side wall; 6. a limiting space; 7. a bearing surface; 8. a guide convex rib; 9. a limiting bump; 10. a first limiting part; 11. a second limiting part; 12. a vehicle body main body; 13. a chain; 14. a flywheel; 15. and C, a fluted disc.
Detailed Description
Various exemplary embodiments of the present application will now be described in detail with reference to the accompanying drawings. It should be noted that: the relative arrangement of the components and steps, the numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present application unless specifically stated otherwise.
The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the application, its application, or uses.
Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate.
In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
According to a first aspect of the present application, a chain tensioner is provided, as shown in fig. 1 and 2, comprising a base 1, a swing arm 2 and a chain support assembly. Base 1 is used for the fixed setting on the bicycle of the chain ware that rises of this application, provides the support for the chain ware that rises of this application. The base 1 may be a separate component, for example, the base 1 has a plate-shaped structure, and the base 1 is fixedly disposed on the bicycle by a connecting member 4 such as a screw. The base 1 is provided with a hole or a support frame and other connecting structures, and the other parts of the chain expanding device are arranged on the base 1. Of course, the base 1 can also be integrally formed with the parts on the bicycle, so that the assembly process can be reduced, and the time can be saved.
The first end of rocking arm 2 with base 1 rotatable coupling makes the distance between the second end of rocking arm 2 and chain 13 can change, is convenient for drive chain holds in palm subassembly lift chain 13. The first end of the rocker arm 2 and the base 1 may be connected to each other, the first end of the rocker arm 2 and the base 1 are directly connected to each other through a threaded connector 4 such as a screw, so that the first end of the rocker arm 2 rotates relative to the base 1 with the threaded connector 4 as a rotation axis, or the first end of the rocker arm 2 and the base 1 are connected to each other through a bearing or the like, so that the first end of the rocker arm 2 rotates relative to the base 1. Further, the swing arm 2 rotates relative to the base 1 in a first rotation plane, and the chain 13 mounted on the bicycle operates in a second rotation plane, wherein the first rotation plane is coplanar with the second rotation plane, or the first rotation plane is parallel to the second rotation plane. In the process of lifting the sagging chain 13 through the rotation of the rocker arm 2, no matter how much the lifting chain 13 is lifted, the chain 13 can be entirely positioned in the second rotating plane, and the problem that the lifted chain 13 is deviated from the second rotating plane and is dislocated with other chains 13 to influence the transmission of the chain 13 or cause the chain 13 to be worn is avoided.
Specifically, a support plate is arranged on the base 1, the elastic member 3 is a pressure spring, one end of the elastic member 3 is fixedly arranged on the support plate, and the other end of the elastic member 3 is connected with the rocker arm 2. When the elastic element 3 is not deformed, the rocker arm 2 is supported by the elastic element 3, so that the second end of the rocker arm 2 is in a lifting state away from the chain 13. At this point, the second end of the swing arm 2 is pressed down toward the chain 13 until the chain 13 is placed on the chain rest assembly. In the process, the elastic part 3 is compressed between the rocker arm 2 and the support plate and deforms, and the elastic part 3 tends to reset after deforming, so that power for lifting the rocker arm 2 is provided, the chain support assembly can lift the chain 13, the chain 13 is kept in a tight state, and the chain 13 is prevented from sagging.
This application can lift the chain 13 of flagging part through the chain support subassembly, makes chain 13 be in the state of tightening, avoids chain 13 to use the back flagging and form the problem of interfering with other structures of bicycle for a long time. In addition, the flywheel 14 does not need to be installed, the structure of the bicycle can be prevented from being changed greatly, and cost is saved.
Optionally, the chain support assembly comprises a connecting piece 4 and a guide rail 5, one end of the connecting piece 4 is rotatably connected with the second end of the rocker arm 2, the other end of the connecting piece 4 is fixedly connected with the guide rail 5, and a chain 13 is placed on the guide rail 5. That is, the chain 13 is lifted by the rail 5, and the chain 13 slides on the rail 5 during the cycling. The connecting piece 4 plays the connection the guide rail 5 with the effect of rocking arm 2, wherein, the connecting piece 4 with rocking arm 2 rotatable coupling can be through changing the contained angle between rocking arm 2 and the connecting piece 4 to guarantee the relative position relation between guide rail 5 and the chain 13, and then guaranteed that guide rail 5 can lift chain 13 reliably.
Specifically, as shown in fig. 1 and 2, a through hole is formed at the second end of the rocker arm 2, a rotating shaft is disposed in the through hole, and one end of the connecting member 4 is connected to the rotating shaft, so that the connecting member 4 is rotatably connected to the second end of the rocker arm 2. The two ends of the rotating shaft respectively extend out of the through holes formed in the second end of the rocker arm 2, the end part of the connecting piece 4 is provided with connecting parts which are oppositely arranged, and the two connecting parts are respectively connected with the two ends of the rotating shaft. Furthermore, two connecting portions are connected through a cross arm, the cross arm can not only play a connecting role, but also can offset with the rocker arm 2 to play a limiting role, and the connecting piece 4 can be prevented from driving the guide rail 5 to rotate to an unnecessary angle, so that the condition that the chain 13 is not easily arranged on the guide rail 5 is generated, and the guide rail 5 and the chain 13 are ensured to be correctly assembled.
Optionally, the connecting element 4 and the guide rail 5 define a limiting space 6, and the limiting space 6 is used for accommodating a chain 13. The chain 13 can be limited in the limiting space 6, and the chain 13 is prevented from being separated from the guide rail 5. For example, the connecting members 4 are located on two sides of the guide rail 5, and at this time, the guide rail 5 and the connecting members 4 located on two sides of the guide rail 5 form a limiting space 6 around the guide rail 5, so that the chain 13 is limited by the guide rail 5 and the connecting members 4 located on two sides of the guide rail 5, and the chain 13 is prevented from being separated from the guide rail 5, so that the present application can reliably operate.
Optionally, the connecting piece 4 includes a supporting portion 401, one end of the supporting portion 401 is bent to extend out of the fixing portion 402, the guide rail 5 includes a bottom plate 501 and a side wall 502, the bottom plate 501 is fixedly disposed on the fixing portion 402, the side wall 502, the bottom plate 501 and the supporting portion 401 enclose the limiting space 6, that is, the connecting piece 4 is only located on one side of the guide rail 5, the other side of the guide rail 5 is the side wall 502 of the guide rail 5, and the chain 13 can cross the side wall 502 of the guide rail 5 and be placed in the limiting space 6, so that the chain 13 can be installed and maintained conveniently. Specifically, as shown in fig. 1 and 2, one end of the supporting portion 401 is connected to the swing arm 2, the other end of the supporting portion 401 is bent to extend out of the fixing portion 402, the bending angle between the fixing portion 402 and the supporting portion 401 is ninety degrees, the guide rail 5 is fixedly disposed on one side of the fixing portion 402 close to the supporting portion 401, and the side wall 502 of the guide rail 5 is located on one side of the bottom plate 501 of the guide rail 5 far from the supporting portion 401.
Optionally, along the length direction of the guide rail 5, the bearing surface 7 of the guide rail 5 for bearing the chain 13 is a curved surface, and the bearing surface 7 of the guide rail 5 protrudes toward the direction of the chain 13. That is, the bearing surface 7 of the guide rail 5 is a curved surface structure with a high middle part and low two sides. In the process of driving the chain 13, the chain 13 entering the guide rail 5 can firstly contact with the bearing surface 7 on the guide rail 5, so that the interference between the two ends of the guide rail 5 and the chain 13 is avoided, and the reliable driving of the chain 13 is facilitated. Specifically, the guide rail 5 is a plate-shaped structure extending in a bending manner, and the overall structure of the guide rail 5 is in an inverted V shape.
Optionally, the guide rail 5 has a guide rib 8 on the bearing surface 7 for bearing the chain 13 along the length direction of the guide rail 5. The chain 13 is assembled by a plurality of pairs of side walls 502 arranged oppositely and a plurality of rollers connected with the side walls 502, and the rollers are positioned in the side walls 502, so that a groove penetrating through the whole chain 13 along the length direction of the chain 13 is formed between the opposite side walls 502 and the rollers on the chain 13. When the chain 13 contacts the guide rail 5, the guide convex rib 8 is positioned in the groove and can play a role in guiding and limiting.
Optionally, the first end of the rocker arm 2 has a limit protrusion 9, and when the rocker arm 2 rotates to a predetermined angle, the limit protrusion 9 abuts against the base 1. Can inject 2 pivoted angles of rocking arm, and then can inject the chain and hold in the palm the height that the subassembly lifted chain 13, avoid the chain to hold in the palm the subassembly and lift chain 13 too high, and then appear chain 13 and take place to interfere with other parts on the bicycle, guaranteed the reliability that this application used, improved user and used experience.
Optionally, the base 1 has a first limiting portion 10 and a second limiting portion 11, when the rocker arm 2 rotates to a first predetermined angle, the limiting protrusion 9 abuts against the first limiting portion 10, and when the rocker arm 2 rotates to a second predetermined angle, the limiting protrusion 9 abuts against the second limiting portion 11, so as to limit the rotation of the rocker arm 2 within a fixed angle, for example, limit the rotation angle of the rocker arm 2 within 50-70 degrees, and further avoid the occurrence of interference between the chain 13 and other components on the bicycle, thereby ensuring the reliability of the use of the present application. In addition, the first position-limiting portion 10 and the second position-limiting portion 11 are respectively provided with a fixing hole for fixing the base 1, for example, a screw is inserted through the fixing hole and fixed on a bicycle, so that the base 1 is fixed. In the present embodiment, the first stopper portion 10 and the second stopper portion 11 are used as both the stopper member and the fixing portion 402, so that the structural arrangement of the base 1 can be simplified, the material can be saved, and the cost can be reduced.
Optionally, the holding tank has been seted up to the first end of rocking arm 2, the first end of rocking arm 2 pass through threaded connection 4 with base 1 connects, elastic component 3 includes the torsional spring, the torsional spring is located in the holding tank, the one end of torsional spring with the tank bottom of holding tank is connected, the other end of torsional spring with base 1 connects, threaded connection 4 follows the axial of torsional spring is passed the torsional spring, this embodiment makes the simple structure of this application compact, is convenient for install and use. Specifically, as shown in fig. 1 and 2, the torsion spring is located in the accommodating groove formed in the first end of the rocker arm 2, an opening of the accommodating groove formed in the first end of the rocker arm 2 abuts against the base 1, a convex portion extending from one end of the torsion spring is inserted into a groove at the bottom of the accommodating groove, and a convex portion extending from the other end of the torsion spring is inserted into a groove of the base 1. Then, a screw is used to penetrate through the first end of the rocker arm 2 and is connected with the base 1, so that the screw is superposed with the axis of the torsion spring.
According to a second aspect of the present application, a shared bicycle is provided, as shown in fig. 3 and 4, comprising a body 12, a chain transmission assembly and the chain tensioner, the chain transmission assembly and the chain tensioner are fixedly arranged on the body 12, and the chain tensioner lifts a chain 13 in the chain transmission assembly. The problem that the chain 13 sags after long-term use and interferes with other structures of the bicycle can be avoided.
Optionally, as shown in fig. 4, the chain transmission assembly further includes a toothed disc 15 and a flywheel 14, the chain 13 is engaged with the toothed disc 15 and the flywheel 14, and the chain tensioner is disposed adjacent to the toothed disc 15. The chain expanding device is far away from the flywheel 14 with small peripheral space, the structural change of the bicycle can be avoided, the chain expanding device is installed, and the cost is saved. The chain expanding device is adjacent to the chain plate 15, and may be that a distance between the chain expanding device and a side edge of the chain plate 15 close to the chain expanding device is less than or equal to a predetermined distance, where the predetermined distance is one third of a distance between an edge of the flywheel 14 close to the chain plate 15 and an edge of the chain plate 15 close to the flywheel 14.
Although some specific embodiments of the present application have been described in detail by way of example, it should be understood by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the present application. It will be appreciated by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the present application. The scope of the application is defined by the appended claims.
Claims (11)
1. A chain tensioner, comprising:
a base;
the first end of the rocker arm is rotatably connected with the base, and an elastic part is arranged between the rocker arm and the base;
the chain support component is rotatably connected with the second end of the rocker arm;
under the state that the chain is placed on the chain support assembly, the elastic piece drives the chain support assembly to lift the chain through the rocker arm.
2. The chain tensioner as claimed in claim 1, wherein the chain support assembly comprises a connecting member and a guide rail, one end of the connecting member is rotatably connected to the second end of the rocker arm, the other end of the connecting member is fixedly connected to the guide rail, and a chain is disposed on the guide rail.
3. The chain tensioner as claimed in claim 2, wherein the connecting member and the guide rail define a limiting space for accommodating a chain.
4. The chain tensioner according to claim 3, wherein the connecting member comprises a supporting portion, one end of the supporting portion is bent to extend out of the fixing portion, the guide rail comprises a bottom plate and a side wall, the bottom plate is fixedly arranged on the fixing portion, and the side wall, the bottom plate and the supporting portion enclose the limiting space.
5. The chain tensioner according to claim 2, wherein along the length direction of the guide rail, the bearing surface of the guide rail bearing the chain is a curved surface, and the bearing surface of the guide rail protrudes in the direction of the chain.
6. The chain tensioner according to claim 2, wherein the guide rail has a guide rib on the bearing surface of the guide rail for bearing the chain along the length direction of the guide rail.
7. The chain tensioner as claimed in claim 1, wherein the first end of the rocker arm has a limiting protrusion, and the limiting protrusion abuts against the base when the rocker arm rotates to a predetermined angle.
8. The chain tensioner as claimed in claim 7, wherein the base has a first position-limiting portion and a second position-limiting portion, the position-limiting protrusion abuts against the first position-limiting portion when the rocker arm rotates to a first predetermined angle, and the position-limiting protrusion abuts against the second position-limiting portion when the rocker arm rotates to a second predetermined angle;
the first limiting part and the second limiting part are respectively provided with a fixing hole for fixing the base.
9. The chain tensioner as claimed in claim 1, wherein the first end of the rocker arm is provided with a receiving groove, and the first end of the rocker arm is connected to the base through a threaded connection;
the elastic part comprises a torsional spring, the torsional spring is located in the accommodating groove, one end of the torsional spring is connected with the groove bottom of the accommodating groove, the other end of the torsional spring is connected with the base, and the threaded connecting piece penetrates through the torsional spring along the axial direction of the torsional spring.
10. A shared bicycle, which is characterized by comprising a bicycle body, a chain transmission assembly and a chain expander as claimed in any one of claims 1 to 9, wherein the chain transmission assembly and the chain expander are fixedly arranged on the bicycle body, and the chain expander lifts a chain in the chain transmission assembly.
11. The shared bicycle of claim 10, wherein the chain drive assembly further comprises a chainring and a flywheel, the chain being engaged with the chainring and the flywheel, the chain tensioner being disposed adjacent the chainring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123443293.5U CN216969908U (en) | 2021-12-31 | 2021-12-31 | Chain expanding device and shared bicycle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123443293.5U CN216969908U (en) | 2021-12-31 | 2021-12-31 | Chain expanding device and shared bicycle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216969908U true CN216969908U (en) | 2022-07-15 |
Family
ID=82350251
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202123443293.5U Active CN216969908U (en) | 2021-12-31 | 2021-12-31 | Chain expanding device and shared bicycle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216969908U (en) |
-
2021
- 2021-12-31 CN CN202123443293.5U patent/CN216969908U/en active Active
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