CN212047762U - Crank for shared vehicle and shared vehicle - Google Patents

Abstract

The utility model discloses a crank and sharing vehicle for sharing vehicle. The crank comprises an iron core, wherein the iron core is provided with a middle shaft end, an extension section and a pedal end, the middle shaft end and the pedal end are respectively positioned at two ends of the extension section, the part of the extension section, which is connected with the middle shaft end, forms a bending structure, and a middle shaft hole is formed in the middle shaft end; the plastic layer is wrapped on the surface of the iron core, a first through hole is formed in the outer end face of the center shaft hole of the plastic layer, the thickness of the plastic layer at the first through hole is gradually increased along the direction from the center shaft end to the pedal end, and therefore the outer end face of the first through hole is inclined relative to the outer end face of the center shaft hole. The technical effect of the utility model lies in that, the mode that adopts the outer plastic layer of encapsulating of iron core constitutes the crank, is showing and is reducing articulate cost.

Description

Crank for shared vehicle and shared vehicle

Technical Field

The utility model belongs to the technical field of the shared vehicle, specifically, relate to crank and shared vehicle of shared vehicle

Background

In recent years, with the rapid development of internet technology and intelligent mobile terminals, a self-service rental-type shared vehicle service has developed into a convenient and efficient travel service. When a consumer selects a transportation mode to perform short-distance movement, the consumer often selects a shared vehicle as a transportation tool. Such as a shared bicycle.

At present, the crank of the shared vehicle is generally made of aluminum alloy or stainless steel, and the cost is high. It is desirable to significantly reduce costs while ensuring performance requirements, including structural strength, appearance, and the like.

SUMMERY OF THE UTILITY MODEL

It is an object of the present invention to provide an improved crank.

According to a first aspect of the present invention, there is provided a crank for a shared vehicle, comprising:

the iron core is provided with a middle shaft end, an extension section and a pedal end, the middle shaft end and the pedal end are respectively positioned at two ends of the extension section, the part of the extension section connected with the middle shaft end forms a bending structure, and a middle shaft hole is formed in the middle shaft end;

the plastic layer is wrapped on the surface of the iron core, a first through hole is formed in the outer end face of the center shaft hole of the plastic layer, the thickness of the plastic layer at the first through hole is gradually increased along the direction from the center shaft end to the pedal end, and therefore the outer end face of the first through hole is inclined relative to the outer end face of the center shaft hole.

Optionally, the pedal end has a predetermined offset outward along the axial direction of the central shaft hole relative to the central shaft end, and the offset has a value range of 10mm to 20 mm.

Optionally, the thickness of the region of the plastic layer covering the bending structure is greater than the thickness of the region of the plastic layer covering the connection between the extension section and the foot rest end, and/or

The thickness of the plastic layer at the foot end and/or at the neutral axis end is greater than the thickness of the plastic layer in other regions of the extension section, and/or

The iron core is provided with an outer side face and an inner side face, and the thickness of the plastic layer on the outer side face is larger than that of the plastic layer on the inner side face.

Optionally, the plastic layer has a thickness in the range of 2mm to 10 mm.

Optionally, the plastic layer is encapsulated on the surface of the iron core by one-time injection molding.

Optionally, a rib extending along the length direction of the extension section is formed on the extension section, the plastic layer covers the rib, and a smooth surface is formed on the plastic layer on the extension section on which the rib is formed.

Optionally, the first through hole has a same diameter as that of the center hole, a pedal hole is formed at the pedal end, the center hole and the pedal hole have axes parallel to each other, and a second through hole is formed at the outer end surface of the pedal hole in the plastic layer, the second through hole having a diameter larger than that of the pedal hole.

Optionally, the plastic layer is made of a modified polypropylene material, and the injection molding shrinkage of the modified polypropylene is less than 5%.

Optionally, the ratio of the thickness of the extension section in the axial direction of the central axis hole to the thickness of the plastic layer in the axial direction of the central axis hole is not less than 1:1 and not more than 4.5: 1.

According to another aspect of the present disclosure, a shared vehicle includes:

the bicycle body comprises a bicycle body main body, a bicycle handle main body and a bicycle handle, wherein the bicycle body main body is provided with five through holes, and a middle shaft is rotatably arranged in the five through holes;

in the crank, the middle shaft is inserted into the middle shaft hole, and the middle shaft hole is fixedly connected with the middle shaft;

a footrest rotatably connected to the footrest end.

The utility model discloses a technological effect lies in, adopts the iron core to encapsulate the mode of plastic layer outward and constitutes the crank, is showing and is reducing articulate cost.

Other features of the present invention and advantages thereof will become apparent from the following detailed description of exemplary embodiments of the invention, 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 invention and together with the description, serve to explain the principles of the invention.

Fig. 1 is a schematic structural diagram of an iron core of a crank provided by the present invention;

fig. 2 is a schematic view of another angle of the iron core of the crank provided by the present invention;

fig. 3 is a perspective view of the crank provided by the present invention;

fig. 4 is a top view of the crank provided by the present invention;

FIG. 5 is a cross-sectional view taken along line A-A of FIG. 4;

description of reference numerals:

in the figure: 1. an iron core; 100. a curved structure; 11. a middle shaft end; 111. a middle shaft hole; 12. an extension section; 13. a pedal end; 131. a pedal hole; 2. a plastic layer; 201. a first through hole; 202. a second through hole; 3. and (5) convex ribs.

Detailed Description

Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that: unless specifically stated otherwise, 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 invention.

The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, 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.

As shown in fig. 1 to 5, the present invention provides an improved crank for a shared vehicle, which has better corrosion resistance, excellent appearance and lower cost. The utility model discloses the shared vehicle that indicates is bicycle, electric bicycle, moped, electric motor car etc.. The utility model provides a crank can be applied to above-mentioned vehicle at least.

As shown in fig. 3, the crank comprises an iron core 1 and a plastic layer 2. Referring to fig. 1 and 2, the iron core 1 has a central shaft end 11, an extension section 12 and a pedal end 13, wherein the central shaft end 11 and the pedal end 13 are respectively located at two ends of the extension section 12, and the two ends do not exclude other structures arranged outside the central shaft end 11 or the pedal end 13. Further, the portion of the extension section 12 connected to the middle shaft end 11 forms a bending structure 100, and the middle shaft end 11 is formed with a middle shaft hole 111. The bending structure 100 not only enables the crank to have a good avoiding effect on a frame and the like in the rotating process, but also beautifies the appearance and the shape of the crank, and has a good visual effect.

Specifically, the middle axle end 11 is fixedly connected with a middle axle of the shared vehicle, that is, the middle axle passes through a middle axle hole 111 of the middle axle end 11 and is fixedly connected with the middle axle end 11; the step end 13 is rotatably connected to a step of the shared vehicle. The user is through pedal with power transmission to the crank, and the crank rotation drives the axis rotation, drives the rear wheel rotation then, and the crank can pass to the rear wheel with people's power and make the shared vehicle go forward promptly, and iron core 1 is the articulate atress part, can bear pedal power of transmitting to the crank well.

As shown in fig. 5, the plastic layer 2 is wrapped on the surface of the core 1, and the plastic layer 2 is formed with a first through hole 201 at the outer end face of the center hole 111. When installing the crank in the axis, first through-hole 201 is convenient for provide the effect of hiding, accomodating the protection to the fastener that inserts axis hole 111, can prevent effectively that the fastener is outwards protruding, and then causes the influence to the outward appearance of sharing vehicle. The plastic layer 2 has a thickness gradually increasing from the side of the central axis hole 111 remote from the footrest end 13 to the side of the central axis hole 111 close to the footrest end 13, as shown in the direction a in fig. 5. That is, the thickness of the plastic layer 2 at the first through hole 201 gradually increases in a direction from the medial axis end 11 to the pedal end 13. The end surface of the first through-hole 201 is inclined as shown in fig. 5. The thickness of plastic layer 2 in bending structure 100 department is great, has filled the interior concave surface of iron core 1 in bending structure 100 department well, has not only compensatied the influence of the curvature catastrophe of bending structure 100 to the plastic layer 2 that bending structure 100 surface cladding effectively for the whole outward appearance of plastic layer 2 is more level and smooth, and visual effect is better, helps improving the plastic layer 2 in bending structure 100 department to the protective strength of iron core 1 moreover. Further, the outer end face of the first through hole 201 is inclined with respect to the outer end face of the center hole 111, the outer end face refers to a side end face away from the vehicle frame, and the inner end face refers to a side end face close to the vehicle frame. Under the state that the fastener is installed in centre bore 111, the outer terminal surface of the first through-hole 201 that is the slope gesture has given first through-hole 201 the different protection degree of depth in different positions, has especially increased the protection degree of depth that first through-hole 201 is close to pedal end 13 to protect well and hide the fastener, can prevent moreover that the fastener that exposes among the riding process from colluding to debris or user's bottom of a trouser leg. Further, since the end surface of the first through hole 201 is designed to be inclined, foreign matter, standing water, and the like are not likely to remain in the first through hole. If water or other foreign matters exist in the first through hole, the crank rotates along with the stepping of the pedal by the user, the posture of the crank is changed to that the thinner side of the first through hole is positioned below, and the thicker side of the first through hole is positioned above. Therefore, accumulated water or foreign matters in the first through hole are easy to be separated from the first through hole and are not easy to be accumulated in the first through hole.

In addition, through for the terminal surface of first through-hole design slope, can reduce the difference of fastener and plastic layer 2 colour and bring the visual impact for the user, improved the uniformity of automobile body outward appearance.

The utility model discloses a crank, plastic layer 2 are sealed closely on iron core 1's surface, reduce the contact of iron core 1's surface and air or rainwater, have reduced iron core 1's surface effectively and have rusted phenomenons such as, and the surface of plastic layer 2 easily washs and maintains in addition, has reduced the degree of difficulty of shared vehicle's washing and maintenance, and increase of service life saves the cost to help keeping the good outward appearance of shared vehicle.

The crank of the utility model is encapsulated by plastic, which has the advantages of low cost, light weight, easy processing, etc. The cost of the iron material and the plastic material is lower than that of the existing common stainless steel and aluminum alloy. Through plastic packing, the utility model discloses a crank can enough satisfy structural strength requirement and can reach the effect that reduces raw materials, processing cost again.

In addition, the plastic layer 2 is processed into various colors, shapes and structures, so that the requirement of sharing the appearance of the vehicle can be satisfied.

Alternatively, referring to fig. 5, the step end 13 has a predetermined offset amount with respect to the neutral axis end 11 in the axial direction of the neutral axis hole 111. In practical application, the pedal end 13 may be offset to a side of the middle shaft end 11 close to the frame, or offset to a side of the middle shaft end 11 far from the frame, preferably, the pedal end 13 is offset to a side of the middle shaft end 11 far from the frame, and a certain distance is kept between the pedal end 13 and the frame of the shared vehicle, so that the crank does not interfere with the frame of the shared vehicle in the rotation process, and the safety of the riding process is ensured. The predetermined offset amount is defined as an offset amount of the outer end surface of the step end 13 in the axial direction of the central axis hole 111 with respect to the outer end surface of the central axis end 11, or an offset amount of the inner end surface of the step end 13 in the axial direction of the central axis hole 111 with respect to the inner end surface of the central axis end 11, the offset amount being in a range of 10mm to 20mm, preferably 15 mm. The offset of the pedal end 13 towards the side of the middle shaft end 11 away from the frame needs to be a value within a certain range, so that the pedal end 13 always keeps a certain safe distance from the frame in the process of crank rotation, the interference of the pedal to the frame when the crank is driven to rotate is effectively prevented, and meanwhile, the proper offset can well play the role of force transmission of the crank.

Alternatively, referring to fig. 5, the thickness of the plastic layer 2 covering the area of the bent structure 100 is greater than the thickness of the plastic layer 2 covering the area where the extension section 12 is connected to the footrest end 13. In this embodiment, the curvature of the bending structure 100 is suddenly changed to cause the peeling, cracking or aging of the plastic layer 2 coated on the outer surface of the bending structure, and the thicker plastic layer 2 coated on the bending structure 100 can improve the coating strength of the plastic layer 2 and increase the adhesion strength of the plastic layer 2 and the iron core 1, so that the iron core 1 can be better protected.

Alternatively, the plastic layer 2 is formed to have a smoothly curved surface from the outer end surface side of the central axis hole 111 to the outer end surface side of the foothold 131. A smooth surface is viewed geometrically intuitively, which means that the surface has a tangent plane at each point, and the direction of the tangent plane changes continuously with the continuous variation of the points on the surface. In this embodiment, a smooth curved surface, i.e. a smooth, coherent and non-dimpled curved surface, contributes to the visually attractive appearance of the plastic layer 2. More importantly, the smooth curved surface formed by the plastic layer can better release internal stress in the processing process, and the stress concentration is not easy to generate due to the absence of the corner structure. The design can reduce the risk of cracking and deformation of the plastic layer under the environment of sunshine and repeated temperature change, and is suitable for the practical application requirement of shared bicycles.

Alternatively, the thickness of the plastic layer 2 at the foot end 13 and/or at the central axis end 11 is greater than the thickness of the plastic layer 2 in other regions of the extension 12. In this embodiment, the adhesion strength of the plastic layer 2 to the iron core 1 at the pedal end 13 and/or the middle shaft end 11 can be effectively increased, and the plastic layer 2 can be effectively prevented from cracking, aging and even falling off at the end of the iron core 1. The plastic layer can provide better protection for the pedal end and/or the neutral axis end.

Alternatively, the plastic layer 2 has a thickness in the range of 2mm to 10 mm. The thickness of the plastic layer 2 is required to be greater than 7mm at the thickest position and preferably greater than or equal to 2mm at the thinnest position, thereby helping to ensure the strength and stability of the entire plastic layer 2 covering the iron core 1.

Alternatively, the plastic layer 2 is encapsulated on the surface of the iron core 1 by one-time injection molding. In this embodiment, complicated shapes and details can be formed at a time, surface smoothness is good, production cost is low, and plastic can be attached to the outer surface of the core 1 more stably.

Optionally, the core 1 has an outer side and an inner side, the thickness of the plastic layer 2 on the outer side being greater than the thickness of the plastic layer 2 on the inner side. The outer side surface refers to the surface of the iron core 1 far away from the frame, and the inner side surface refers to the surface of the iron core 1 near the frame. When the crank is in practical application, because the plastics of the lateral surface of iron core 1 receive sunshine long time longer than the plastics of medial surface, it is ageing more easily, the ageing time of the plastics of lateral surface can be prolonged better to thicker lateral surface plastics, slows down ageing rate, and life is longer, reduces cost of maintenance.

Alternatively, as shown in fig. 2, a rib 3 extending along the length direction of the extension 12 is formed on the extension 12, and the plastic layer 2 covers the rib 3. The convex rib 3 can be arranged on the outer side surface of the extension section 12, also can be arranged on the inner side surface of the extension section 12, and is preferably arranged on the inner side surface of the extension section 12, and the convex rib 3 can improve the compressive strength of the extension section 12 and can effectively prevent the crank from being bent relative to the circumferential direction of the middle shaft. Further, the rib 3 may be provided in plural, preferably plural ribs 3 arranged in parallel, so that the strength of the iron core 1 can be further improved.

Alternatively, referring to fig. 3, the plastic layer 2 is formed with a smooth surface on the extension 12 formed with the bead 3. In this embodiment, the plastic layer 2 forms a smooth surface in the length direction of the extension 12 of the bead 3, which not only maintains good appearance but also reduces interference with the vehicle frame and is very convenient to clean.

Optionally, the bore diameter of the first through hole 201 is flush with the bore diameter of the central axis hole 111. In such an embodiment, when the cranks are mounted to the bottom bracket of the shared vehicle by means of fasteners, not only is it more convenient to mount the fasteners, but the fasteners can be better protected.

Optionally, the pedal end 13 is formed with a pedal hole 131, and the pedal hole 131 is used for mounting a pedal; the axes of the middle shaft hole 111 and the pedal hole 131 are parallel to each other, so that the installation is convenient, the stability of the power transmitted to the middle shaft by the pedal is ensured, and the loss of the power in the transmission process is greatly reduced; the plastic layer 2 is formed with a second through hole 202 at an outer end surface of the foothold 131, and the aperture of the second through hole 202 is larger than that of the foothold 131. The pedals are fixed to the crank by the fastening members when the pedals are mounted to the pedal holes 131, and the second through holes 202 facilitate the assembly of the pedals.

Optionally, the plastic layer 2 is made of a modified polypropylene material, and the injection shrinkage rate of the modified polypropylene is less than 5%. The modified polypropylene material can remarkably improve the flame retardant property and the heat-resistant and high-temperature-resistant property of the plastic layer 2, enhance the low-temperature-resistant property of the plastic layer 2, reduce the shrinkage rate of the plastic layer 2 and ensure the size stability of the plastic layer 2. The modified polypropylene has an injection shrinkage of less than 5%, preferably 3%, which helps to maintain the smooth curved surface of the plastic layer 2 formed by the post-injection molding process.

Alternatively, the ratio of the thickness of the extension 12 in the axial direction of the central axis hole 111 to the thickness of the plastic layer 2 in the axial direction of the central axis hole 111 is not less than 1:1 and not more than 4.5: 1. In practical application, on the premise of ensuring the strength of the iron core 1, the thicker plastic layer 2 can meet the requirement of the overall appearance shape of the crank, and the cost of the crank can be further reduced. The thickness of the plastic layer 2 in the axial direction of the central axis hole 111 may be the thickness of the plastic layer 2 on the inner side or the outer side of the extension section, or the sum of the thicknesses of the plastic layer 2 on the inner side and the outer side of the extension section 12. For example, if the thickness of the plastic layer 2 covering the outer side or the inner side of the extension section is 2mm, the thickness of the extension section 12 along the axial direction of the central shaft hole 111 is 2mm to 9 mm; for example, when the plastic layer 2 covers the outside of the extension portion with a thickness of 3mm and the inside with a thickness of 2mm, i.e., the sum of the thicknesses of the inside and outside is 5mm, the extension portion 12 has a thickness of 5mm to 22.5mm in the axial direction of the center hole 111. The crank has fully combined the advantage of iron core 1 and plastic layer 2 in extension section 12 department, can not only exert the compressive strength of iron core 1 greatly, can form the plastic layer 2 protection thickness of preferred on the surface of iron core 1 moreover to form relatively stable bonding strength between iron core 1 and plastic layer 2, thereby promoted the performance and the life of crank effectively, reduced maintenance frequency and cost.

According to the utility model also provides a sharing vehicle, this sharing vehicle can be sharing bicycle, sharing electric bicycle, sharing moped etc.. It is suitable for the application requirements of most shared vehicles used in a pedal mode.

The shared vehicle includes a vehicle body, a crank, and a footrest. The vehicle body main body is provided with a five-through hole, a middle shaft is rotatably arranged in the five-through hole, and the five-through hole is used for assembling the middle shaft; meanwhile, the middle shaft is inserted into the middle shaft hole 111, the middle shaft hole 111 is fixedly connected with the middle shaft, and the crank rotates to drive the middle shaft to rotate; the pedals are rotatably connected to the pedal ends 13, the cranks are driven to rotate by driving the pedals, and the rear wheels of the shared vehicle are driven to rotate by the middle shaft.

The plastic layer 2 is tightly encapsulated on the surface of the iron core 1, so that the contact between the surface of the iron core 1 and air or rainwater is avoided, the phenomena of rusting and the like on the outer surface of the iron core 1 are effectively avoided, the difficulty in cleaning and maintaining shared vehicles is reduced, and the good appearance of the shared vehicles is also kept.

Although certain specific embodiments of the present invention have been described in detail by way of example, it should be understood by those skilled in the art that the foregoing examples are for purposes of illustration only and are not intended to limit the scope of the invention. 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 invention. The scope of the invention is defined by the appended claims.

Claims (10)

1. A crank for a shared vehicle, comprising:

the iron core is provided with a middle shaft end, an extension section and a pedal end, the middle shaft end and the pedal end are respectively positioned at two ends of the extension section, the part of the extension section connected with the middle shaft end forms a bending structure, and a middle shaft hole is formed in the middle shaft end;

the plastic layer is wrapped on the surface of the iron core, a first through hole is formed in the outer end face of the center shaft hole of the plastic layer, the thickness of the plastic layer at the first through hole is gradually increased along the direction from the center shaft end to the pedal end, and therefore the outer end face of the first through hole is inclined relative to the outer end face of the center shaft hole.

2. The crankset of claim 1, wherein the pedal end is offset outwardly from the neutral axis end by a predetermined offset in a direction along the axis of the neutral axis opening, the offset having a value in a range of 10mm to 20 mm.

3. Crank according to claim 1, characterised in that the thickness of the plastic layer in the area of the bending structure is greater than the thickness of the plastic layer in the area of the extension section in connection with the pedal end and/or

The thickness of the plastic layer at the foot end and/or at the neutral axis end is greater than the thickness of the plastic layer in other regions of the extension section, and/or

The iron core is provided with an outer side face and an inner side face, and the thickness of the plastic layer on the outer side face is larger than that of the plastic layer on the inner side face.

4. A crank as claimed in claim 1, wherein the plastic layer has a thickness in the range of 2mm to 10 mm.

5. The crank of claim 1 wherein the plastic layer is encapsulated on the surface of the core by one-shot injection molding.

6. The crank of claim 1 wherein the extension has a rib formed thereon extending along the length of the extension, the plastic layer overlying the rib, the plastic layer forming a smooth surface on the extension in which the rib is formed.

7. The crank as claimed in claim 1, wherein the first through hole has the same diameter as that of the center hole, the pedal end is formed with a pedal hole, the center hole and the pedal hole have axes parallel to each other, the plastic layer is formed with a second through hole at an outer end surface of the pedal hole, and the second through hole has a diameter larger than that of the pedal hole.

8. The crank of claim 1 wherein the plastic layer is made of a modified polypropylene material, and the modified polypropylene has an injection shrinkage of less than 5%.

9. The crank of claim 1 wherein the ratio of the thickness of the extension in the axial direction of the central bore to the thickness of the plastic layer in the axial direction of the central bore is not less than 1:1 and not more than 4.5: 1.

10. A shared vehicle, comprising:

the bicycle body comprises a bicycle body main body, a bicycle handle main body and a bicycle handle, wherein the bicycle body main body is provided with five through holes, and a middle shaft is rotatably arranged in the five through holes;

the crankset of any one of claims 1 to 9, wherein said bottom bracket is inserted into said bottom bracket opening, said bottom bracket opening being fixedly connected to said bottom bracket;

a footrest rotatably connected to the footrest end.

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