Chain cover

Abstract

The utility model discloses a chain cover which comprises a connecting piece, a first chain cover body, a second chain cover body and a third chain cover body. The second chain cover is detachably connected with the connecting piece, at least part of the first chain cover and at least part of the second chain cover are located on the two opposite sides of the connecting piece, and the first chain cover and the second chain cover are detachably connected; a protection cavity used for containing a flywheel, a chain and a chain wheel is formed among the inner wall of the first chain cover, the inner wall of the second chain cover and the outer wall of the connecting piece, the first chain cover, the second chain cover and the connecting piece form a chain cover structure, and a first through hole and a second through hole which are communicated with the protection cavity are formed in the chain cover structure. Compared with the prior art, the chain cover has the advantages that the chain cover is simple in structure, the first chain cover body, the second chain cover body and the third chain cover body are connected in an inserted mode and other structures convenient to disassemble, fixing can be achieved only through one fastener, the installation mode is convenient and fast, and safety performance is high.

Description

Technical Field

[0001] This utility model belongs to the field of bicycle accessories technology, specifically relating to a chain guard. Background Technology

[0002] A chain guard is a protective cover installed on the outside of a bicycle chain. Common chain guards are half-chain guards and full-chain guards. For example, the existing utility model patent CN203497080U provides a "Bicycle Chain Guard", which discloses a semi-enclosed chain guard. Although it can protect the freewheel and chainring, it does not provide sufficient protection for the chain. Another example is CN2104175U, which provides a "Convenient New Type of Bicycle Full Chain Guard". However, the left-middle-right connection of this chain guard results in low installation stability and strength. Therefore, it is very important to obtain a chain guard that overcomes the above defects. Utility Model Content

[0003] To solve at least one of the above-mentioned technical problems, this utility model provides a chain cover, comprising:

[0004] Connector

[0005] The first chain cover is detachably connected to the connector;

[0006] The second chain cover is detachably connected to the connector, and the first chain cover and the second chain cover are located at least partially on opposite sides of the connector. The first chain cover and the second chain cover are detachably connected.

[0007] The inner wall of the first chain cover, the inner wall of the second chain cover, and the outer wall of the connector form a protective chamber for accommodating the flywheel, chain, and chainring. The first chain cover, the second chain cover, and the connector form a chain cover structure. The chain cover structure has a first through hole and a second through hole that communicate with the protective chamber.

[0008] Connectors are installed at the notches in the cross-sections of the first and second chain guards to form a fully enclosed structure. For example, if the cross-sections of the first and second chain guards are U-shaped, the connectors are connected to the openings of the U-shaped structure to seal and achieve a fully enclosed structure. The chain can be placed inside the cavity formed by the inner wall of the U-shaped structure of the first chain guard and the outer wall of the connector, protecting the chain from being restricted in its movement. The chainring and freewheel are located in the protective cavity, which can prevent the rider's feet from being damaged by the chainring and freewheel, thus increasing safety.

[0009] The first chain cover and the connector are connected by at least one first detachable structure, the first detachable structure including a first plug-in disposed on the first chain cover and the connector, and a first slot cooperating with the first plug-in.

[0010] The second chain cover and the connector are connected by at least one second detachable structure, the second detachable structure including a second plug-in disposed on the second chain cover and the connector, and a second slot cooperating with the second plug-in.

[0011] The first chain cover and the second chain cover are connected by a third connecting structure, which includes a limiting member disposed on the first chain cover and the second chain cover, and a limiting groove that cooperates with the limiting member.

[0012] An elastic arm is fixed to the inner wall of the first chain cover, and the end of the elastic arm protrudes to form the limiting member. The first chain cover and the second chain cover are connected by a fourth connecting structure, which includes a fastener, a through hole in the second chain cover and the first chain cover, and a screw hole. The fastener passes through the through hole and is fixed by a threaded connection.

[0013] A fifth connecting structure is provided between the first chain cover and the second chain cover. The fifth connecting structure includes an inner wall formed on the top surface of the second chain cover, a groove on the bottom surface of the first chain cover, and a protrusion that mates with the groove.

[0014] The connector includes a connecting base plate with several curved surfaces and / or several flat surfaces forming an enclosed or semi-enclosed structure. A first slot and a second slot are formed at both ends of the outer surface of the connecting base plate. The inner wall of at least one side of the first slot and / or the second slot is beveled, so that the opening width of the first slot and / or the second slot is greater than the bottom width.

[0015] The connecting base plates have a gap between their ends to form a notch, thus forming the semi-enclosed structure; the connecting base plates are connected end to end to form a fully enclosed structure.

[0016] Compared with the prior art, the advantages of this utility model are: the utility model has a simple structure, and the first chain cover, the second chain cover and the third chain cover are mostly connected by a plug-in or other easily disassembled structure, which can be fixed by only one fastener. The installation method is convenient, quick and easy and has high safety performance. Attached Figure Description

[0017] Figure 1 This utility model is three-dimensional. Figure 1 ;

[0018] Figure 2 This utility model is three-dimensional. Figure 2 ;

[0019] Figure 3 This is an exploded view of the present invention;

[0020] Figure 4 The cross-section of this utility model is three-dimensional. Figure 1 ;

[0021] Figure 5The cross-section of this utility model is three-dimensional. Figure 2 ;

[0022] Figure 6 This is a schematic diagram illustrating the use of this utility model;

[0023] Figure 7 The cross-section of this utility model is three-dimensional. Figure 3 ;

[0024] Figure label:

[0025] 1 Connector; 101 First slot; 102 Second slot; 103 Connecting base plate; 104 Bevel; 105 Spacing; 106 Raised strip; 107 Mounting piece; 108 Mounting elongated hole; 109 Arc-shaped recess;

[0026] 2. First chain cover; 201. First insert; 202. Limiting component; 203. Elastic arm; 204. Screw hole; 205. Protrusion;

[0027] 3. Second chain cover; 301. Second insert; 302. Limiting groove; 303. Perforation; 304. Groove; 305. Recess;

[0028] 4. Protect the chamber;

[0029] 501 First perforation; 502 Second perforation;

[0030] 601 First adapter groove; 602 Higher sidewall;

[0031] 7. Freewheel; 8. Chain; 9. Chainring. Detailed Implementation

[0032] To enable those skilled in the art to better understand this utility model and to more clearly define the scope of protection claimed by this utility model, the present utility model is described in detail below with reference to certain specific embodiments. It should be noted that the following are only some specific embodiments of the present utility model concept, and are only a part of the embodiments of this utility model. The specific and direct description of related structures is only for the convenience of understanding this utility model, and the specific features do not necessarily or directly limit the scope of implementation of this utility model.

[0033] Referring to the accompanying drawings, the present invention adopts the following technical solution: a chain cover, comprising:

[0034] Connector 1,

[0035] The first chain cover 2 is detachably connected to the connector 1;

[0036] The second chain cover 3 is detachably connected to the connector 1. The first chain cover 2 and the second chain cover 3 are located at least partially on opposite sides of the connector 1. The first chain cover 2 and the second chain cover 3 are detachably connected. In this embodiment, an upper, middle and lower structure is used to achieve the connection.

[0037] A protective chamber 4 for accommodating the flywheel 7, chain 8, and chain ring 9 is formed between the inner wall of the first chain cover 2, the inner wall of the second chain cover 3, and the outer wall of the connector 1. The first chain cover 2, the second chain cover 3, and the connector 1 form a chain cover structure. The chain cover structure has a first through hole 501 and a second through hole 502 that communicate with the protective chamber 4.

[0038] Connector 1 is installed at the notch of the cross-section of the first chain guard 2 and the second chain guard 3 to form a full-enclosure structure. For example, if the cross-section of the first chain guard 2 and the second chain guard 3 is a U-shaped structure, then connector 1 is connected to the opening of the U-shaped structure to seal and achieve a full-enclosure structure. The chain 8 can be placed inside the cavity formed by the inner wall of the U-shaped structure of the first chain guard 2 and the outer wall of connector 1, protecting the chain 8 from being restricted in its movement. The chainring 9 and the freewheel 7 are located in the protective chamber 4, which can prevent the rider's feet from being damaged by the freewheel 7, chainring 9, etc., and increase safety.

[0039] The first chain cover 2 and the connector 1 are connected by at least one first detachable structure, the first detachable structure including a first plug 201 disposed on the first chain cover 2 and the connector 1, and a first slot 101 that cooperates with the first plug 201.

[0040] The second chain cover 3 and the connector 1 are connected by at least one second detachable structure, the second detachable structure including a second plug 301 disposed on the second chain cover 3 and the connector 1, and a second slot 102 that cooperates with the second plug 301.

[0041] The first chain cover 2 and the second chain cover 3 are connected by a third connecting structure, which includes a limiting member 202 disposed on the first chain cover 2 and the second chain cover 3, and a limiting groove 302 that cooperates with the limiting member 202.

[0042] An elastic arm 203 is fixed to the inner wall of the first chain cover 2, and the end of the elastic arm 203 protrudes to form the limiting member 202. The first chain cover 2 and the second chain cover 3 are connected by a fourth connecting structure, which includes a fastener, a through hole 303 in the second chain cover 3 and the first chain cover 2, and a screw hole 204. The fastener passes through the through hole 303 and is fixed by a threaded connection. The fastener connection method is more reliable, but in other embodiments, the fourth connecting structure may not be provided, that is, two third connecting structures can be directly provided and fixed by the elastic arm 203 hook.

[0043] A fifth connecting structure is provided between the first chain cover 2 and the second chain cover 3. The fifth connecting structure includes an inner wall formed on the top surface of the second chain cover 3, a groove 304 on the bottom surface of the first chain cover 2, and a protrusion 205 that cooperates with the groove 304.

[0044] The connector 1 includes a connecting base plate 103 with several curved surfaces and / or several flat surfaces forming an enclosed or semi-enclosed structure. The first slot 101 and the second slot 102 are opened at both ends of the outer surface of the connecting base plate 103. The inner wall of at least one side of the first slot 101 and the second slot 102 is a slope 104, so that the opening width of the first slot 101 and the second slot 102 is greater than the bottom width.

[0045] The connecting base plate 103 has a gap 105 between its ends to form a notch and thus form the semi-enclosed structure; the connecting base plates 103 are connected end to end to form a fully enclosed structure. The connecting base plates 103 on both sides of the gap 105 are shaped into elastic arms 203 structures, which allow the connector 1 to fit tightly against the first chain cover 2 and the second chain cover 3 during installation.

[0046] Among them, protrusions 106 are integrally formed at both ends of the outer surface of the connecting base plate 103. The shape formed by the protrusions 106 is adapted to the connecting base plate 103. The first slot 101 is opened on the protrusion 106 located in the upper half and the second slot 102 is opened on the protrusion 106 located in the lower half.

[0047] In this embodiment, the first plug-in 201 extends downward from the inner surface of the first chain cover 2. The heights of the side walls of the first slot 101 and the second slot 102 are not the same, and the side wall located outside the connecting base plate 103 is higher. A first adapter groove 601 is opened on the outer surface of the first chain cover 2. The higher side wall 602 cooperates with the first adapter groove 601 so that the outer surface of the protrusion 106 and the outer surface of the first chain cover 2 are on the same plane. The structure of this part of the second chain cover 3 is the same as that of the first chain cover 2.

[0048] The outer surfaces of the first chain cover 2 and the second chain cover 3 are located on the same plane. The first through hole 501 is divided into two first half holes respectively opened in the first chain cover 2 and the second chain cover 3; the second through hole 502 is divided into two second half holes respectively opened in the first chain cover 2 and the second chain cover 3.

[0049] In this embodiment, the first perforation 501 is larger than the second perforation 502, the first perforation 501 is circular, and the second perforation 502 is square-round.

[0050] A recess 305 is provided on the second chain cover 3, and a perforation 303 is provided on the bottom surface of the recess 305.

[0051] Several mounting parts 107 can be installed on the connector 1. The mounting parts 107 have mounting holes 108 to install the present invention onto the bicycle frame.

[0052] The outer surface of connector 1 is provided with an arc-shaped recess 109.

[0053] Compared with the prior art, the advantages of this utility model are: the utility model has a simple structure, and the first chain cover 2, the second chain cover 3 and the third chain cover are mostly connected by a plug-in structure that is easy to disassemble. It can be fixed by only one fastener, and the installation method is convenient, quick and safe.

[0054] The technical solution of this utility model has been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the protection scope of this utility model is obviously not limited to these specific embodiments. Without departing from the principle of this utility model, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will all fall within the protection scope of this utility model.

Claims

1. A chain guard characterized by: include: Connector (1), The first chain cover (2) is detachably connected to the connector (1); The second chain cover (3) is detachably connected to the connector (1), the first chain cover (2) and the second chain cover (3) are located at least partially on opposite sides of the connector (1), and the first chain cover (2) and the second chain cover (3) are detachably connected. The inner wall of the first chain cover (2), the inner wall of the second chain cover (3), and the outer wall of the connector (1) form a protective chamber (4) for accommodating the flywheel (7), chain (8), and chainring (9). The first chain cover (2), the second chain cover (3), and the connector (1) form a chain cover structure. The chain cover structure is provided with a first through hole (501) and a second through hole (502) that communicate with the protective chamber (4).

2. The chain guard of claim 1, wherein: The first chain cover (2) and the connector (1) are connected by at least one first detachable structure, the first detachable structure including a first plug (201) disposed on the first chain cover (2) and the connector (1) and a first slot (101) cooperating with the first plug (201).

3. The chain cover of claim 1, wherein: The second chain cover (3) and the connector (1) are connected by at least one second detachable structure, the second detachable structure including a second plug (301) disposed on the second chain cover (3) and the connector (1) and a second slot (102) cooperating with the second plug (301).

4. The chain cover of claim 1, wherein: The first chain cover (2) and the second chain cover (3) are connected by a third connection structure, which includes a limiting member (202) disposed on the first chain cover (2) and the second chain cover (3) and a limiting groove (302) cooperating with the limiting member (202).

5. The chain guard of claim 4, wherein: An elastic arm (203) is fixed on the inner wall of the first chain cover (2), and the end of the elastic arm (203) protrudes to form the limiting member (202).

6. The chain cover according to claim 1 or 4 or 5, characterized in that: The first chain cover (2) and the second chain cover (3) are connected by a fourth connection structure, which includes a fastener, a through hole (303) and a screw hole (204) in the second chain cover (3) and the first chain cover (2). The fastener passes through the through hole (303) and is fixed by the thread.

7. The chain cover of claim 1, wherein: A fifth connection structure is provided between the first chain cover (2) and the second chain cover (3). The fifth connection structure includes an inner wall formed on the top surface of the second chain cover (3), a groove (304) on the bottom surface of the first chain cover (2), and a protrusion (205) that cooperates with the groove (304).

8. The chain cover of claim 1, wherein: The connector (1) includes a connecting base plate (103) with several arc surfaces and / or several flat plates forming an enclosed or semi-enclosed structure, and a first slot (101) and a second slot (102) are opened at both ends of the outer surface of the connecting base plate (103).

9. The chain cover of claim 8, wherein: The inner wall of at least one side of the first slot (101) and / or the second slot (102) is a bevel (104) so ​​that the opening width of the first slot (101) and / or the second slot (102) is greater than the bottom width.

10. The chain guard of claim 9, wherein: The connecting bottom plate (103) has a space (105) between the head and tail to form a gap to form the semi-enclosed structure; the connecting bottom plate (103) is connected at the head and tail to form a full-enclosed structure.

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