Connecting structure and riding equipment

Abstract

The utility model relates to a connecting structure and riding equipment, the connecting structure comprises an inner connecting piece, an outer connecting piece and a locking piece, the inner connecting piece comprises an inner connecting part, an inner positioning part and a guide part, and a guide surface gradually expanding towards the inner positioning part is formed on the guide part; the outer connecting piece comprises an outer connecting part and an outer positioning part, and the outer connecting part is detachably connected to the outer side of the inner connecting part; the locking piece is arranged between the outer connecting part and the inner positioning part, in the connecting state, the locking piece is extruded in the connecting process of the inner connecting piece and the outer connecting piece, under the action of the guide face, the locking piece expands outwards along the guide face and is in contact connection with the inner wall of the connecting channel of the mandrel in an interference connection mode, and therefore the locking piece can be locked. Therefore, the connection between the connecting structure and the mandrel is more stable, the crank is more firmly limited by the outer connecting piece, and the risk that the crank falls off from the mandrel in the riding process is prevented.

Description

Technical Field

[0001] The utility model belongs to the technical field of riding equipment accessories, and specifically relates to a connecting structure and riding equipment. Background Art

[0002] Bicycles, also known as bicycles or bikes, are usually two-wheeled small land vehicles. People ride on them and use pedals as power. They are green and environmentally friendly means of transportation and can be used as an environmentally friendly means of transportation for travel. More and more people use bicycles as fitness equipment for cycling and cycling trips.

[0003] Bicycling itself is also a competitive sport, including road cycling, mountain biking, track cycling, stunt biking, etc. During cycling, the user drives the wheel to rotate by pedaling the cranks. Usually, the cranks are fixed to the two ends of the spindle by interference fit, and the cranks and spindle are further fixed by radial fixing bolts. This fixing method requires holes to be drilled in the spindle and the cranks, which affects the structural strength of the cranks and spindles. In addition, the fixing bolts are easy to fall off during long-term use, and there is a high risk of the cranks falling off the spindle, posing a threat to the safety of the rider. Summary of the invention

[0004] The utility model aims to provide a connection structure and a riding device to solve the problems existing in the prior art such as poor connection stability between the crank and the spindle, and the fact that radially fixing the crank and the spindle by fixing bolts or the like easily causes unstable structural strength and the crank is easy to fall off the spindle during riding.

[0005] In order to achieve the above-mentioned utility model purpose, the utility model adopts the following technical solutions:

[0006] In one aspect, the utility model provides a connection structure, characterized in that it includes:

[0007] An inner connecting member, comprising an inner connecting portion, an inner positioning portion formed at one end of the inner connecting portion, and a guide portion formed between the inner connecting portion and the inner positioning portion, wherein the outer diameter of the inner positioning portion is larger than the outer diameter of the inner connecting portion, and the guide portion is formed with a guide surface that gradually expands toward the inner positioning portion;

[0008] An external connecting member, comprising an external connecting portion and an external positioning portion formed at one end of the external connecting portion, wherein the external connecting portion is detachably connected to the outer side of the internal connecting portion;

[0009] A locking piece is arranged between the outer connecting part and the inner positioning part. In the connected state, the locking piece extends radially outward along the inner connecting part under the action of the guide surface until it has an interference fit with the inner wall of the core shaft, so that the outer connecting part is fixed to the end of the core shaft.

[0010] In some embodiments of the present application, a penetrating connecting channel is formed in the core shaft, a connecting thread segment is formed at at least one end of the connecting channel, an outer wall of the external connecting part is formed with an external thread, and the external connecting part is threadedly connected in the connecting thread segment.

[0011] In some embodiments of the present application, a connecting recess is formed at one end of the external connecting member away from the external positioning portion, an internal thread is formed on the side wall of the connecting recess, a matching thread adapted to the internal thread is formed on the outer wall of the internal connecting portion, and the rotation direction of the internal thread is opposite to that of the external thread.

[0012] In some embodiments of the present application, an outer diameter of the inner positioning portion is not greater than an inner diameter of the connecting channel.

[0013] In some embodiments of the present application, the locking member is ring-shaped and is made of rubber.

[0014] In some embodiments of the present application, the minimum diameter of the guide portion is not greater than the inner diameter of the locking member, and the minimum distance between the guide portion and the connecting channel is smaller than the wire diameter of the locking member.

[0015] In some embodiments of the present application, the height dimension of the guide portion along the axial direction of the inner connecting member is 60%-75% of the wire diameter dimension of the locking member.

[0016] In another aspect, the present invention further provides a cycling device, comprising a spindle and cranks connected to both ends of the spindle, wherein at least one crank is connected to the spindle via any of the connection structures described above.

[0017] In some embodiments of the present application, the external positioning portion abuts against one end of the core shaft, and the maximum outer diameter of the external positioning portion is greater than the maximum outer diameter of the core shaft.

[0018] In some embodiments of the present application, a connecting hole and a limiting groove are formed on the crank, the limiting groove is formed at one end of the connecting hole close to the external positioning portion, a limiting surface is formed between the limiting groove and the connecting hole, and the limiting surface is in contact and connected with the external positioning portion.

[0019] Compared with the prior art, the advantages and positive effects of the present invention are:

[0020] The connection structure and riding equipment involved in the present application, after the spindle and the crank are connected, the end of the crank is further limited by the connection structure, so as to prevent the crank from falling off the end of the spindle;

[0021] The connecting structure includes an inner connecting part, an outer connecting part and a locking part. The outer connecting part is connected to the core shaft and the inner connecting part. During the connection process between the inner connecting part and the outer connecting part, the locking part is squeezed. Under the action of the guide surface, the locking part expands outward along the guide surface, and contacts and connects to the inner wall of the connecting channel of the core shaft in an interference fit manner, so that the connection between the connecting structure and the core shaft is more stable, and the outer connecting part limits the crank more securely, thereby preventing the risk of the crank falling off the core shaft during riding.

[0022] After reading the specific embodiments of the present invention in conjunction with the accompanying drawings, other features and advantages of the present invention will become more clear. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0024] Figure 1 This is a schematic diagram of the connection state of the mandrel and the crank proposed by the utility model;

[0025] Figure 2 This is a schematic diagram of the split spindle and crank;

[0026] Figure 3 It is a schematic cross-sectional view of the connection between the mandrel and the crank;

[0027] Figure 4 yes Figure 3 A is an enlarged schematic diagram;

[0028] Figure 5 It is a schematic diagram of the connection structure;

[0029] Figure 6 It is a schematic diagram of the cross-section of the connection structure;

[0030] Figure 7 It is a schematic diagram of the connection structure splitting;

[0031] Figure 8 It is a schematic diagram of the internal connecting parts structure;

[0032] Fig. 9 is a schematic diagram of the mandrel structure;

[0033] Fig.10 It is a schematic diagram of the crank cutaway;

[0034] Fig.11 yes Fig.10 The enlarged schematic diagram of point B in FIG.

[0035] In the figure,

[0036] 100, core shaft; 110, connecting channel; 120, toothed outer connecting surface;

[0037] 200. Connection structure;

[0038] 210, external connecting member; 211, external positioning portion; 212, external connecting portion; 213, connecting recess;

[0039] 220, locking member; 221, inner connecting portion; 222, inner positioning portion; 223, guiding portion; 224, guiding surface;

[0040] 230, internal connector;

[0041] 300, crank; 310, toothed inner connecting surface; 320, limiting groove; 321, limiting surface. DETAILED DESCRIPTION

[0042] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0043] In the description of the present application, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply 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 understood as a limitation on the present application.

[0044] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise specified, "plurality" means two or more.

[0045] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, a direct connection, or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0046] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0047] The disclosure below provides many different embodiments or examples for realizing different structures of the present invention. In order to simplify the disclosure of the present invention, the components and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the present invention. In addition, the present invention may repeat reference numbers and / or reference letters in different examples, and such repetition is for the purpose of simplification and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed.

[0048] refer to Figure 1-Figure 4 The present application proposes a connection structure 200 and a cycling device, the cycling device includes a spindle 100 and a crank 300, the crank 300 is connected to both ends of the spindle 100, at least one crank 300 and the spindle 100 are connected and positioned by the above-mentioned connection structure 200, and the connection structure 200 can prevent the crank 300 from falling off the spindle 100.

[0049] refer to Figure 5-Figure 7 The connection structure 200 specifically includes an inner connection member 230, an outer connection member 210 and a locking member 220. The outer connection member 210 is connected to one end of the core shaft 100 through the inner connection member 230 and the locking member 220. The outer connection member 210 limits the crank 300 to prevent the crank 300 from falling off the core shaft 100.

[0050] The inner connecting member 230 specifically includes an inner connecting portion 221, an inner positioning portion 222 and a guiding portion 223. The inner positioning portion 222 is formed at one end of the inner connecting portion 221. The cross-sectional shapes of the inner positioning portion 222 and the inner connecting portion 221 are both circular, and the diameter of the inner positioning portion 222 is larger than that of the inner connecting portion 221.

[0051] The guide portion 223 is formed between the inner connection portion 221 and the inner positioning portion 222 . Along the axial direction of the inner connection portion 221 , the guide portion 223 is formed with a guide surface 224 that gradually expands along a direction approaching the inner positioning portion 222 .

[0052] A tube-to-tube connecting channel 110 is formed on the core shaft 100 , and the diameter of the connecting channel 110 is not less than the size of the inner positioning portion 222 , so that the inner positioning portion 222 can be inserted into the connecting channel 110 .

[0053] The external connection member 210 includes an external connection portion 212 and an external positioning portion 211 formed at one end of the external connection portion 212 . The external connection portion 212 is detachably connected to the outer side of the internal connection portion 221 .

[0054] The size of the outer positioning portion 211 is larger than the outer diameter of the core shaft 100 . In the connected state, the outer positioning portion 211 abuts against the end surface of the core shaft 100 .

[0055] The outer connection portion 212 is connected to the outer side of the inner connection portion 221 by means of thread connection or snap connection.

[0056] The locking member 220 is arranged between the outer connecting member 210 and the inner connecting member 230. Specifically, under the action of the inner connecting member 230 and the outer connecting member 210, the locking member 220 extends and expands outward, tightly fitting with the side wall of the connecting channel 110 of the core shaft 100 to achieve the locking of the connecting structure 200 and the core shaft 100.

[0057] Specifically, the locking member 220 is disposed between the outer connecting portion 212 and the inner positioning portion 222 .

[0058] The locking member 220 is an annular structure, and its material is a soft material such as rubber.

[0059] The outer connecting part 212 is connected to the outer side of the inner connecting part 221. As the outer connecting part 212 and the inner connecting part 221 are connected, the locking piece 220 is gradually squeezed and, under the guidance of the guide surface 224, extends toward the inner wall of the connecting channel 110 and forms an interference fit with the inner wall of the connecting channel 110, so that the outer connecting piece 210 is fixed to the end of the core shaft 100.

[0060] In some embodiments of the present application, the outer connection portion 212 is connected to the connection channel 110 of the core shaft 100 by threads.

[0061] Specifically, a connecting thread section is formed at at least one end of the connecting channel 110 , an outer wall of the external connecting portion 212 is formed with an external thread, and the external connecting portion 212 is fixed in the connecting channel 110 by means of a threaded connection.

[0062] The inner connection portion 221 and the outer connection portion 212 are connected and fixed by threaded connection.

[0063] A connecting recess 213 is formed at one end of the outer connecting portion 212 away from the outer positioning portion 211 , an internal thread is formed on the side wall of the connecting recess 213 , and a matching thread matching the internal thread is formed on the outer wall of the inner connecting portion 221 .

[0064] For example but not limited to, the external thread formed on the external connection portion 212 is an M20 external thread, and correspondingly, the connection thread section in the connection channel 110 is an M20 internal thread.

[0065] The internal thread formed on the inner wall of the connecting recess 213 is an M14 internal thread, and correspondingly, the matching thread formed on the outside of the inner connecting portion 221 is an M14 external thread.

[0066] During the specific connection, the locking member 220 is first placed between the inner connecting member 230 and the outer connecting member 210 , and then the inner connecting portion 221 is pre-threaded into the connecting recess 213 of the outer connecting portion 212 .

[0067] Then, the pre-connected inner connecting part 221 and the locking member 220 are inserted into the connecting channel 110 of the mandrel 100, and the outer connecting part 212 is connected to the connecting threaded section through threads.

[0068] The rotation direction of the internal thread is opposite to that of the external thread. When the external connection section rotates and the external thread is connected to the connection thread section, the external connection part 212 continues to be connected to the internal connection part 221 .

[0069] For example but not limited to, the external thread formed on the external connection part 212 is a positive thread, the internal thread is a negative thread, and the matching thread formed on the internal connection part 221 is a negative thread. This structural method can ensure that the direction of the external connection part 210 and the internal connection part 230 when locked is clockwise, and can prevent the external connection part 210 and the internal connection part 230 from generating a loosening force in the opposite direction to the other when they are locked separately.

[0070] As the outer connection part 212 is connected to the inner connection part 221, the size between the end of the outer connection part 212 and the inner positioning part 222 gradually decreases, and the locking member 220 extends and expands outward under the axial push of the outer connection part 212 and the guidance of the guide surface 224, and gradually locks with the inner wall of the connecting channel 110.

[0071] When the external connecting member 210 is connected to the core shaft 100, the locking member 220 is locked with the inner wall of the connecting channel 110 under the coordinated action of the internal positioning portion 222, the external connecting portion 212 and the guide portion 223, further improving the stability of the connection between the connecting structure 200 and the core shaft 100 and improving the connection strength.

[0072] refer to Figure 7 , Figure 8 Correspondingly, the minimum radial dimension L1 of the guide portion 223 is not greater than the inner diameter dimension L2 of the locking member 220 , so that the locking member 220 is first sleeved on the outer side of the inner connecting portion 221 before connection, and can expand outward along with the guide portion 223 .

[0073] It can also ensure that the locking member 220 can be smoothly introduced above the guiding portion 223 when the outer connecting member 210 and the inner connecting member 230 are locked, and will not be squeezed and damaged by the outer connecting member 210 and the inner connecting member 230 .

[0074] The height dimension h of the guide portion 223 along the axial direction of the inner connecting member 230 is 60%-75% of the wire diameter dimension s of the locking member 220 to ensure that the locking member 220 is in a compressed state when the outer connecting portion 212 contacts the guide portion 223 .

[0075] It can also ensure that after the outer connecting member 210 and the inner connecting member 230 are locked, the locking member 220 will not be overly compressed to cause damage to the locking member 220, and it can ensure that the locking member 220 expands appropriately to produce an interference fit with the inner wall of the connecting channel 110 of the core shaft 100.

[0076] The minimum distance between the guide portion 223 and the connecting channel 110 is smaller than the wire diameter of the locking member 220, so that when the locking member 220 moves to contact the inner positioning portion 222, that is, when the outer connecting portion 212 moves to contact the guide portion, the outer end of the locking member 220 contacts the inner wall of the connecting channel 110.

[0077] The locking member 220 is specifically an O-ring. During the process of connecting the outer connecting member 210 and the inner connecting member 230, the locking member 220 is squeezed to expand outward in the radial direction, and an interference fit is formed with the inner wall of the bicycle's spindle 100, thereby further locking the crankshaft and preventing the crank 300 from loosening during riding.

[0078] refer to Figure 9-11 A connecting hole and a limiting groove portion 320 are formed at one end of the crank 300 connected to the spindle 100 . The limiting groove portion 320 is formed at one end of the connecting hole close to the outer positioning portion 211 .

[0079] The size of the limiting groove portion 320 is larger than the connecting hole, and a limiting surface 321 is formed between the limiting groove portion 320 and the connecting hole. The connecting hole is sleeved on the outer end of the core shaft 100 .

[0080] After the crank 300 is connected, the connecting structure 200 is connected to the connecting channel 110 of the core shaft 100, and the outer positioning portion 211 abuts against the limiting surface 321 to further fix the position of the crank 300 and prevent the crank 300 from falling off the core shaft 100.

[0081] In other embodiments of the present application, toothed external connecting surfaces 120 are formed at both ends of the core shaft 100, and matching toothed internal connecting surfaces 310 are formed in the connecting holes of the crank 300 connected to both ends of the core shaft 100. The toothed connection structure 200 on the core shaft 100 and the crank 300 is beneficial to ensuring the transmission stability of the core shaft 100 and the crank 300 and ensuring movement synchronization.

[0082] In some embodiments of the present application, further connection limitation is achieved between both ends of the spindle 100 and the crank 300 via a connection structure 200 .

[0083] In other embodiments, in order to improve assembly efficiency and reduce costs, one end of the core shaft 100 is directly fixedly connected to the crank 300 by interference fitting.

[0084] The other end of the spindle 100 is further connected to the crank 300 through the connecting structure 200 for limiting.

[0085] In the description of the above embodiments, specific features, structures, materials or characteristics may be combined in a suitable manner in any one or more embodiments or examples.

[0086] The above is only a specific implementation method of the utility model, but the protection scope of the utility model is not limited to this. Any changes or substitutions that can be easily thought of by any technician familiar with the technical field within the technical scope disclosed by the utility model should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. A connection structure, characterized in that: include: An inner connecting member, comprising an inner connecting portion, an inner positioning portion formed at one end of the inner connecting portion, and a guide portion formed between the inner connecting portion and the inner positioning portion, wherein the outer diameter of the inner positioning portion is larger than the outer diameter of the inner connecting portion, and the guide portion is formed with a guide surface that gradually expands toward the inner positioning portion; An external connecting member, comprising an external connecting portion and an external positioning portion formed at one end of the external connecting portion, wherein the external connecting portion is detachably connected to the outer side of the internal connecting portion; A locking piece is arranged between the outer connecting part and the inner positioning part. In the connected state, the locking piece extends radially outward along the inner connecting part under the action of the guide surface until it has an interference fit with the inner wall of the core shaft, so that the outer connecting part is fixed to the end of the core shaft.

2. The connection structure according to claim 1, characterized in that: A penetrating connection channel is formed in the core shaft, a connection thread section is formed at at least one end of the connection channel, an outer wall of the external connection part is formed with an external thread, and the external connection part is threadedly connected in the connection thread section.

3. The connection structure according to claim 2, characterized in that: A connecting recess is formed at one end of the external connecting member away from the external positioning portion, an internal thread is formed on the side wall of the connecting recess, a matching thread adapted to the internal thread is formed on the outer wall of the internal connecting portion, and the rotation direction of the internal thread is opposite to that of the external thread.

4. The connection structure according to claim 2, characterized in that: The outer diameter of the inner positioning portion is not greater than the inner diameter of the connecting channel.

5. The connection structure according to claim 1, characterized in that: The locking piece is annular and is made of rubber.

6. The connection structure according to claim 2, characterized in that: The minimum diameter of the guide portion is not greater than the inner diameter of the locking member, and the minimum distance between the guide portion and the connecting channel is smaller than the wire diameter of the locking member.

7. The connection structure according to claim 1, characterized in that: The height dimension of the guide portion along the axial direction of the inner connecting member is 60%-75% of the wire diameter dimension of the locking member.

8. A cycling device comprising a spindle and cranks connected to both ends of the spindle, characterized in that: At least one crank is connected to the spindle via a connecting structure according to any one of claims 1 to 7.

9. The riding device according to claim 8, characterized in that: The outer positioning portion abuts against one end of the core shaft, and the maximum outer diameter of the outer positioning portion is greater than the maximum outer diameter of the core shaft.

10. The riding device according to claim 9, characterized in that A connecting hole and a limiting groove are formed on the crank, wherein the limiting groove is formed at one end of the connecting hole close to the external positioning portion, a limiting surface is formed between the limiting groove and the connecting hole, and the limiting surface is in contact and connection with the external positioning portion.

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