Integrated crankset with sealing protection structure

Abstract

The utility model discloses an integrated crankset with a sealing protection structure, a protection structure is arranged on the crankset, the protection structure covers at least one side surface of the crankset, and the integrated crankset is characterized in that the protection structure is fixed on the side part of the crankset through a fastener and a glue joint layer; the coverage range of the protection structure does not include transmission teeth of the chain wheel. Firstly, the protective cover is fixed on the crankset in a glue joint and fastening connection mode, abnormal sound caused by a traditional fastener fixing mode is avoided, meanwhile, a sealing layer can be formed on the outer ring, and secondly, a step structure facilitating glue joint is arranged between the protective cover and the crankset, so that the protective cover can be firmly arranged on the crankset.

Description

Technical Field

[0001] The utility model relates to the field of bicycle drive chainrings, and particularly to an integrated chainring with a sealing protection structure. Background Art

[0002] Traditional bicycle chainring guards are usually arranged on one side of the chainring 3 in a split structure ( Figure 1 as shown). This arrangement cannot fully protect the side of the chainring 3, and can only block the dirt splashing onto the chainring from the side. Since there is a large gap 2 between the guard 1 and the chainring 3, dirt may still enter between the guard 1 and the chainring 3 during cycling and contaminate the chainring 3.

[0003] Chinese Patent Publication No. CN114763188A discloses a guard plate device and system for bicycle components. It includes a cover, and the cover is connected to the chain link such that the cover at least partially covers the circumferential portion of the torque output section. This structure clamps and fixes the cover on one side of the torque output section through a fastener cooperating with a back plate. Although the fixation is firm, its axial connection structure is complex and bulky, and the cover body is a solid structure, with high manufacturing precision requirements, high cost, and difficult assembly. Summary of the Utility Model

[0004] In order to achieve the above object, the technical solution adopted by the utility model is:

[0005] An integrated chainring with a sealing protection structure, in which a protection structure is provided on the chainring, the protection structure covers at least one side surface of the chainring, the protection structure is fixed to the side of the chainring through fasteners and an adhesive layer, and the coverage range of the protection structure does not include the drive teeth of the chainring.

[0006] In a preferred embodiment of the utility model, an adhesive application groove for arranging the adhesive layer is provided on the chainring, and the adhesive application groove extends along the circumferential direction of the chainring so that the adhesive layer forms a seal between the protection structure and the chainring.

[0007] In a preferred embodiment of the utility model, the adhesive application groove is located in the outer region of the chainring relative to the fasteners.

[0008] In a preferred embodiment of the utility model, the protection structure contacts the chainring through a first end and a second end, and the connection point of the fastener and the protection structure is located between the first end and the second end.

[0009] In a preferred embodiment of the utility model, a groove for arranging the adhesive layer in cooperation with the adhesive application groove is provided on the first end.

[0010] In a preferred embodiment of the present utility model, a stepped structure that converges towards the groove is provided on the side of the groove, and the stepped structure causes the adhesive layer to converge towards the groove when the protective structure is assembled with the chainring.

[0011] In a preferred embodiment of the present utility model, a first flange is provided on one side of the stepped structure close to the transmission teeth, and the first flange abuts against the first part of the glue application groove.

[0012] In a preferred embodiment of the present utility model, a second flange is provided on one side of the stepped structure away from the transmission teeth, and there is an overflow port between the second flange and the second part of the glue application groove.

[0013] In a preferred embodiment of the present utility model, the protective structure is a protective cover.

[0014] The beneficial effects of the present utility model are as follows:

[0015] For the integrated chainring with a sealing and protective structure provided by the present utility model, firstly, the protective cover is fixed on the chainring by means of adhesive bonding and fastening connection, so as to avoid abnormal noises caused by the traditional fastener fixing method and at the same time form a sealing layer on the outer ring. Secondly, a stepped structure facilitating adhesive bonding is provided between the protective cover and the chainring to ensure that the protective cover can be firmly set on the chainring. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art.

[0017] Figure 1 It is a schematic diagram of the prior art.

[0018] Figure 2 It is an exploded view of the present utility model.

[0019] Figure 3 It is Figure 2 The sectional view of

[0020] Figure 4 It is Figure 3 The partial enlarged view of

[0021] Figure 5 It is Figure 4 The enlarged view of part A of DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. The above description is for the convenience of describing the present utility model and simplifies the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model.

[0023] The singular forms "a", "the", and "said" used in the description include the plural forms unless clearly specified. The terms "comprising", "including", and "having" used in the description indicate the presence of the claimed features, but do not exclude the presence of one or more other features.

[0024] In the description, when it is said that an element is "on", "fixed" to, "connected" to, "joined" to another element, etc., the element can be directly on, fixed to, connected to, joined to or in contact with another element, or there may be an intermediate element.

[0025] It can be understood that although the terms "first", "second", etc. may be used herein to describe different elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from another. Therefore, the first element can be referred to as the second element without departing from the teachings of the concept of the present application.

[0026] Exemplary embodiments of the present application will be described below with reference to the drawings. However, it should be understood that the present application can be presented in many different ways and is not limited to the embodiments described below. It should also be understood that the embodiments disclosed herein can be combined in various ways to provide more additional embodiments. In all the drawings, the same reference numerals represent the same or functionally equivalent elements.

[0027] Figure 2 and Figure 3 The overall structure of this integrated chainring is shown. The protective cover 4 is placed on one side of the chainring 3 and covers the side surface of the chainring 3, only exposing the drive teeth 31 radially protruding from the outer periphery of the chainring 3 to avoid interference between the two. A composite fixing structure of fasteners and adhesive bonding is adopted between the protective cover 4 and the chainring 3 to ensure that the protective cover 4 is stably and firmly fixed on the chainring 3 and forms a seal on the side of the chainring 3 to prevent dirt from seeping into the center of the chainring 3 in the radial direction. It can be understood that the protective cover 4 can be integrally fixed to the chainring 3 and the crank 6 through fasteners.

[0028] Figure 4 and Figure 5Shows the sealing structure between the protective cover and the chainring. The protective cover 4 is hollow and raised. Its middle part is connected to the chainring 3 through a fastener 5. Its two ends have a first end 4b and a second end 4a extending towards the chainring 3. Glue is coated on one side of the chainring 3. The coating direction of the glue extends circumferentially in a ring along the side surface of the chainring 3. The glue connects the first end 4b and the chainring 3 together and forms a seal. This seal is placed at the edge position close to the outer circumference of the chainring 3 to prevent dirt from invading the chainring 3 inward. This rigid and flexible staggered connection method can prevent the protective cover 4 from falling off due to the failure of the flexible connection, and at the same time avoid abnormal noises between the protective cover 4 and the chainring 3.

[0029] Specifically, a glue application groove 32 composed of a first part 33 and a second part 34 is provided on the chainring 3. Correspondingly, a groove 41 matching the glue application groove 32 is provided on the first end 4b. First step structures 42 and second step structures 44 protruding towards the chainring 3 are respectively provided on the side of the groove 41. Since the first part 33 is shallower than the second part 34, a gap 46 is formed between the first step structure 42 and the first part 33 of the glue application groove 32 after the protective cover 4 is installed, and the first flanges 43 located on the first step structure 42 are in contact with each other. The second step structure 44 is located on the side away from the transmission tooth 31 relative to the first step structure 42. A gap is left between the second flange 45 on the second step structure 44 and the second part 34 of the glue application groove 32 after the protective cover 4 is installed to form an overflow port 47. By forming a groove structure that gradually extends inward on both sides of the groove 41 through the first step structure 42 and the second step structure 44, when glue bonding and assembling, the glue is squeezed by the step structure and converges into the groove 41 and fills the glue cavity formed by the first step structure 42, the second step structure 44, the groove 41 and the second part 34 of the glue application groove 32. The gap 46 serves as a buffer space for accommodating a small amount of air discharged from the glue cavity. Since the first flange 43 is in contact with the first part 33, the glue is blocked at this place and forms a seal without overflowing. As the pressure in the cavity increases, the excess glue is discharged from the overflow port 47 without affecting the appearance of the product.

Claims

1. An integrated chainring with a sealing protection structure, wherein a protection structure is provided on the chainring, and the protection structure covers at least one side surface of the chainring, characterized in that The protection structure is fixed to the side of the chainring through fasteners and an adhesive layer, and the coverage of the protection structure does not include the transmission teeth of the chainring.

2. The integrated chainring with a sealed protection structure according to claim 1, wherein Gluing grooves for arranging the adhesive layer are arranged on the chainring, and the gluing grooves extend along the circumferential direction of the chainring so that the adhesive layer forms a seal between the protection structure and the chainring.

3. The one-piece chainring with a sealed protection structure according to claim 2, characterized in that, The gluing grooves are located in the outer region of the chainring relative to the fasteners.

4. The one-piece chainring with a sealed protection structure according to claim 2, characterized in that, The protection structure contacts the chainring through a first end and a second end, and the connection point of the fastener and the protection structure is located between the first end and the second end.

5. The integrated chainring with a sealed protection structure according to claim 4, wherein A groove for arranging the adhesive layer in cooperation with the gluing groove is formed in the first end.

6. The integrated chainring with a sealing protection structure as described in claim 5, wherein A stepped structure converging towards the groove is arranged on the side of the groove, and the stepped structure enables the adhesive layer to converge towards the groove when the protection structure and the chainring are assembled.

7. The integrated chainring with a sealing protection structure as described in claim 6, characterized in that, A first flange is arranged on one side of the stepped structure close to the transmission teeth, and the first flange abuts against a first part of the gluing groove.

8. The integrated chainring with a sealed protection structure according to claim 6, characterized in that, A second flange is arranged on one side of the stepped structure away from the transmission teeth, and there is an overflow port between the second flange and a second part of the gluing groove.

9. The integrated chainring with a sealed protection structure according to claim 1, wherein, The protection structure is a cover.

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