Cargo motorcycle

Abstract

To provide a cargo motorcycle which has a small volume having a large loading capacity and is easily portable.SOLUTION: A cargo motorcycle includes: a front frame member 110 including at least one front wheel; an intermediate frame member 120 including at least two auxiliary wheels 121 and a steering structure; a rear frame member 130 including at least one rear wheel; an expansion and contraction structure 140 which connects the front frame member and the intermediate frame member, and can adjust a distance in a horizontal direction between the front frame member and the intermediate frame member; and a folding device 150 which connects the intermediate frame member and the rear frame member, and can adjust a folded state between the rear frame member and the intermediate frame member. The expansion and contraction structure 140 and the folding device 150 are installed on the cargo motorcycle, thereby cargos having various volumes can be loaded and conveyed, the volume of the whole bicycle is reduced in some use scenes, and user experience can be improved.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present application relates to the field of bicycle technology, and in particular to cargo bikes. [Background technology]

[0002] A cargo bike typically includes a front wheel, a rear wheel, and a frame arranged along a longitudinal axis of the bike. A cargo bike typically also includes a front luggage compartment for carrying and / or transporting goods and / or personnel, which makes the bike relatively large. A cargo bike typically also includes a transmission system for driving the bike, pedals connected to a crankshaft for engaging the transmission system, a seating arrangement for a user to sit on, and a steering arrangement for steering the bike.

[0003] Front-loading cargo bikes are popular with many users due to their low center of gravity, easy operation and control, large luggage carrying capacity, and safety for both the person and the luggage. However, front-loading cargo bikes have problems such as being difficult to turn and move in a small space, taking up a large area when parked, and high long-distance transportation costs, because the luggage carrying capacity of traditional small-volume cargo bikes cannot meet the needs of users, resulting in a poor user experience. Summary of the Invention [Problem to be solved by the invention]

[0004] Based on this, there is a need to provide a cargo bike that has a large loading capacity, a small volume, and is easy to carry, in order to address the problem that the body of the conventional cargo bike is too long and too large in volume. [Means for solving the problem]

[0005] An embodiment of the present application provides a cargo bike, which includes a front frame member including at least one front wheel, an intermediate frame member including at least two auxiliary wheels and a steering structure, a rear frame member including at least one rear wheel, a telescopic structure connecting the front frame member and the intermediate frame member and capable of adjusting a horizontal distance between the front frame member and the intermediate frame member, and a folding device connecting the intermediate frame member and the rear frame member and capable of adjusting a folding state between the rear frame member and the intermediate frame member.

[0006] In some embodiments, the telescopic stroke of the telescopic structure is greater than 25 cm.

[0007] In some embodiments, the telescopic structure includes a telescopic rod and a locking member, one end of the telescopic rod is connected to the middle frame member and the other end of the telescopic rod is connected to the front frame member, and the locking member is used to control the telescopic stroke of the telescopic rod.

[0008] In some embodiments, the intermediate frame member further includes a vehicle head tube, the folding device further includes a pivot shaft, and a center distance between the pivot shaft and the vehicle head tube is 15 cm or more.

[0009] In some embodiments, the intermediate frame member includes two training wheels, the two training wheels are mounted on either side of the cargo bike, and the center distance between the two training wheels is greater than 10 cm.

[0010] In some embodiments, the training wheels are conventional mechanical wheels or motor-driven wheels.

[0011] In some embodiments, the intermediate frame member further includes a training wheel bracket, and a coupling exists between an extended / retracted state of the training wheel bracket and a locked / unlocked state of the folding device.

[0012] In some embodiments, the folding device is in an unlocked state only when the training wheel bracket is in an extended state.

[0013] In some embodiments, the training wheel bracket is coupled to the folding device and is capable of driving the folding device to an unlocked state when the training wheel bracket is in an extended state and of driving the folding device to a locked state when the training wheel bracket is in a retracted state.

[0014] In some embodiments, the auxiliary wheel bracket includes a locking member, a return spring, a sleeve, an ejector rod, and a cam, one end of the locking member is connected to the return spring and the other end is connected to the folding device, and the auxiliary wheel can rotate axially back and forth around the cam.

[0015] The beneficial effects of the cargo bike according to the embodiment of the present application are as follows: By installing a telescopic structure and a folding device on the cargo bike and adjusting the distance between the front frame member and the middle frame member with the telescopic structure, it is possible to load various volumes of luggage, while by adjusting the folding state between the middle frame member and the rear frame member with the folding device, the overall volume of the cargo bike can be reduced in some usage scenarios, and the usage scenarios of the cargo bike are expanded. By combining the telescopic structure and the folding device, the cargo bike according to the embodiment of the present application can be expanded to a variety of usage scenarios on the premise of meeting the various luggage loading needs of users, and the user experience is excellent. [Brief description of the drawings]

[0016] One or more embodiments are illustrated by way of example, not limitation, in the accompanying drawings, in which elements having the same reference numeral designations in the figures represent similar elements, and the figures in the figures are not necessarily drawn to scale, unless otherwise indicated. [Figure 1] FIG. 1 is a structural schematic diagram of a cargo bike according to an embodiment of the present application in an unfolded and unladen state. [Diagram 2] FIG. 2 is a structural schematic diagram of a cargo bike according to an embodiment of the present application in an unfolded and loaded state. [Diagram 3] FIG. 3 is a first schematic diagram showing the structure of a cargo bike according to an embodiment of the present application in a folded and unladen state. [Figure 4] FIG. 4 is a second schematic diagram showing the configuration of the cargo bike according to an embodiment of the present application in a folded and unladen state. [Diagram 5] FIG. 5 is a first schematic diagram showing a structure of a cargo bike according to an embodiment of the present application in a folded and loaded state. [Figure 6] FIG. 6 is a second schematic diagram showing the configuration of the cargo bike according to an embodiment of the present application in a folded and loaded state. [Figure 7] FIG. 7 is a structural schematic diagram of an auxiliary wheel bracket according to an embodiment of the present application, showing a specific structure of the auxiliary wheel bracket. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0017] In order to make the above objects, features and advantages of the present invention clearer and easier to understand, the specific embodiments of the present invention will be described in detail below in conjunction with the drawings. In order to fully understand the present invention, many specific details are set forth in the following description. However, the present invention can be embodied in many other forms different from those described herein, and those skilled in the art can make similar improvements under circumstances that do not violate the meaning of the present invention, so the present invention is not limited to the specific embodiments disclosed below.

[0018] In describing the present invention, it should be understood that the orientations or positional relationships indicated by terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, are based on the orientations or positional relationships shown in the drawings, and are merely for the purpose of easily and simply describing the present invention, and do not indicate or imply that the devices or parts shown must have a specific orientation, be configured, or operate in a specific orientation, and should not be construed as limitations on the present invention.

[0019] It should be noted that the terms "first", "second", etc. are for descriptive purposes only and should not be understood as expressing or implying a relative importance or a number of technical features to be presented. Thus, a feature qualified with "first" or "second" may explicitly or implicitly include one or more of the feature. In the description of the invention, unless otherwise clearly and specifically limited, "plurality" means at least two, e.g., two, three, etc.

[0020] In the present invention, unless otherwise clearly defined and limited, the terms "attached", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, they may be fixedly connected, detachably connected or integrated, may be mechanically connected, or may be electrically connected, and unless otherwise clearly defined, they may be directly connected, indirectly connected through an intermediate medium, or may be internal communication between the two elements or an interactive relationship between the two elements. Those skilled in the art can understand the specific meaning of the above terms in the present invention according to the specific situation.

[0021] In the present invention, unless otherwise clearly defined and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact with each other, or that the first and second features are in indirect contact with each other via an intermediate medium. And a first feature being "above," "upper," and "on the upper surface" of a second feature may simply mean that the first feature is directly above or diagonally above the second feature, or that the horizontal height of the first feature is higher than that of the second feature. A first feature being "below," "below," and "on the lower surface" of a second feature may simply mean that the first feature is directly below or diagonally below the second feature, or that the horizontal height of the first feature is lower than that of the second feature.

[0022] It should be explained that when an element is referred to as being "fixed" or "mounted" to another element, it may be directly on the other element, or intermediate elements may be present. When an element is referred to as being "connected" to another element, it may be directly connected to the other element, or intermediate elements may be present at the same time. As used herein, the terms "vertical," "horizontal," "up," "down," "left," "right," and similar expressions are for illustrative purposes only and do not represent the only embodiments.

[0023] A cargo bike is a bicycle that can carry / transport luggage / people, and the cargo bike may be a general pedal bicycle or an electric bicycle driven by a motor. It should be understood that this application does not limit the drive system of the cargo bike, that is, the cargo bike mentioned in this application may be a general pedal bicycle, an electric bicycle driven by a motor, or of course a bicycle driven by another system.

[0024] 1 is a structural schematic diagram of a cargo bike according to an embodiment of the present application. As shown in FIG. 1, the cargo bike includes a front frame member 110, a middle frame member 120, a rear frame member 130, an extension structure 140, and a folding device 150.

[0025] Here, a front wheel 111 is installed on the front frame member 110, and the number of the front wheels 111 is at least one, and the specific number is not limited in the embodiment of the present application. An auxiliary wheel 121 and a steering structure 123 are installed on the middle frame member 120, and the number of the auxiliary wheels 121 is at least two, and the specific number is not limited in the embodiment of the present application, and the steering structure 123 is used to change the direction of travel of the cargo bike. A rear wheel 131 is installed on the rear frame member 130, and the number of the rear wheels 131 is at least one, and the specific number is not limited in the embodiment of the present application. A telescopic structure 140 is used to connect the front frame member 110 and the middle frame member 120, and the telescopic structure 140, the front frame member 110, and the middle frame member 120 surround each other to form a loading area (not shown, the same applies below), and the loading area is used to load luggage and / or people. The telescopic structure 140 can change the size of the loading area by adjusting the horizontal distance between the front frame member 110 and the middle frame member 120. The folding device 150 is used to connect the middle frame member 120 and the rear frame member 130, and can adjust the folding state between the rear frame member 130 and the middle frame member 120.

[0026] As shown in FIG. 1, the telescopic stroke of the telescopic structure 140 is the shortest, and in this case, the horizontal distance between the front frame member 110 and the middle frame member 120 is the shortest, and the cargo bike at this time may be used as a normal bicycle.

[0027] As shown in FIG. 2, the telescopic structure 140 is in an extended state. In this case, by adjusting the telescopic stroke of the telescopic structure 140, the horizontal distance between the front frame member 110 and the middle frame member 120 can be adjusted based on the luggage volume, thereby adjusting the size of the loading area based on the luggage volume.

[0028] As shown in FIGS. 1-2, the folding device 150 is in a locked state and is used to connect the middle frame member 120 and the rear frame member 130, in which case the folding device 150 serves to provide a fixed connection, and the cargo bike takes the form of a regular bicycle.

[0029] As shown in Figures 3 to 6, the folding device 150 is in an unlocked state, and the rear frame member 130 can be folded to the side of the middle frame member 120. In this case, the front wheel 111 installed on the front frame member 110 and the two auxiliary wheels 121 installed on the middle frame member 120 form a stable three-point support. In this case, the length and volume of the entire body of the cargo bike are significantly reduced, making it easier for the user to carry and transport, and also facilitating the user to enter and exit elevators, doorways, narrow curves, etc., and occupying a smaller area when parking. In addition, since a stable three-point support is formed between the front wheel 111 installed on the front frame member 110 and the two auxiliary wheels 121 installed on the middle frame member 120, the cargo bike is very stable and robust when parked or in motion.

[0030] It should be noted that in the embodiment of the present application, both the telescopic structure 140 and the folding device 150 can adopt some common telescopic structure designs and folding structure designs that are widely used, and there is no one-to-one correspondence between the telescopic state and telescopic stroke of the telescopic structure 140 and the lock / unlock state of the folding device 150, and the user may arbitrarily combine and adjust them based on the volume, type, use scene, use state, etc. of the luggage to be loaded. The embodiment of the present application is not limited thereto. For example, when the telescopic structure 140 is in an extended state, the folding device 150 may be in one of the locked / unlocked states, and when the telescopic structure 140 is in a contracted state, the folding device 150 may be in one of the locked / unlocked states.

[0031] 1-2, in some embodiments, the telescopic stroke of the telescopic structure 140 is greater than 25 cm, preferably, the telescopic stroke of the telescopic structure 140 can reach up to about 50 cm, so as to ensure that the cargo bike can carry most of the daily necessities. Of course, this is only a preferred setting, and the specific telescopic stroke of the telescopic structure is not limited here.

[0032] In some embodiments, still referring to Figures 1-2, the intermediate frame member 120 further includes a vehicle body head tube 122, which is directly connected to the steering structure 123, and the folding device 150 further includes a rotating shaft 151, and the center distance between the rotating shaft 151 and the vehicle body head tube 122 is 15cm or more, so that the width when the rear frame member 130 is in the folded state can be appropriately ensured, and it can be easier to enter and exit elevators, doorways, narrow curves, etc., and can also be easier to park in narrow places. It should be explained that the center distance between the rotating shaft 151 and the vehicle body head tube 122 specifically refers to the distance between the center point of the end face of the rotating shaft 151 and the central axis of the vehicle body head tube 122.

[0033] In some embodiments, the number of the auxiliary wheels 121 installed on the intermediate frame member 120 is at least two, but the specific number is not limited in the embodiments of the present application. Furthermore, when the number of the auxiliary wheels 121 is two, the two auxiliary wheels 121 are installed on both the left and right sides of the cargo bike body, and the center distance between the two auxiliary wheels 121 is set to be greater than 20 cm for better stability, but the specific numerical value is not limited in the embodiments of the present application.

[0034] Furthermore, the auxiliary wheels 121 may be general mechanical wheels or motor-driven wheels, and the embodiments of the present application are not limited thereto.

[0035] In some embodiments, as shown in Figs. 5-6, the telescopic structure 140 includes a telescopic rod 141 and a locking member 142, where one end of the telescopic rod 141 is connected to the middle frame member 120 and the other end is connected to the front frame member 110, and the locking member 142 is used to control the telescopic stroke of the telescopic rod 141. In addition, the locking member 142 may be a hose clamp, and the purpose of telescopic is achieved by tightening or loosening the telescopic rod 141 by the hose clamp. Of course, the locking member 142 may be other locking structures, such as bolts, and the telescopic stroke of the telescopic rod 141 is controlled by tightening or loosening the bolts, and the embodiments of the present application are not limited to the specific structure of the locking member 142. Furthermore, the locking member 142 can be connected to the middle frame member 120, and the telescopic rod 141 can be connected to the front frame member 110, and the telescopic rod 141 can protrude into the locking member 142, and the locking member 142 can change the telescopic stroke by locking the telescopic rod 141 during its forward and backward movement.

[0036] 6, the intermediate frame member 120 further includes an auxiliary wheel bracket 124 (not shown, the same applies below), which is mainly used to control the state of the auxiliary wheel 121. When the auxiliary wheel bracket 124 is in an extended state, the auxiliary wheel 121 can assist the movement of the cargo bike by contacting the ground. When the auxiliary wheel bracket 124 is in a retracted state, there is a certain distance between the auxiliary wheel 121 and the ground, and the cargo bike at this time realizes the movement of a bicycle through the transmission of the front wheel 111 and the rear wheel 131.

[0037] In addition, there is an interlocking relationship between the position of the auxiliary wheel bracket 124 and the lock / unlock state of the folding device 150, specifically, the folding device 150 is in an unlocked state only when the auxiliary wheel bracket 124 is in an extended state, so that the user can only unlock the folding device 150 when the auxiliary wheel bracket 124 is in an extended state and the auxiliary wheels 121 can contact the ground, and the space between the middle frame member 120 and the rear frame member 130 is in a folded state. This setting ensures that the user does not accidentally unlock the folding device 150 and that the center of gravity of the cargo bike is not displaced and unstable when in a folded state, making it safer in various application scenarios.

[0038] It should be noted that the folding device 150 may adopt a common folding structure, such as a rotating shaft folding structure, a shaft folding structure, a cam folding structure, etc., and the embodiment of the present application is not limited to the specific structure of the folding device. The interlocking relationship between the extended / retracted state of the auxiliary wheel bracket 124 and the locked / unlocked state of the folding device 150 may be realized by various interlocking structures, such as a mechanical lock, and there may be various types of interlocking relationship, for example, when the auxiliary wheel bracket 124 is in the extended state, the folding device 150 may be in the locked state, and the embodiment of the present application is not limited to the specific interlocking structure and interlocking relationship.

[0039] In some embodiments, the training wheel bracket 124 is coupled to the folding device 150 such that when the training wheel bracket 124 is in an extended state, the folding device 150 can be driven to an unlocked state, and when the training wheel bracket 124 is in a retracted state, the folding device 150 can be driven to a locked state.

[0040] It should be explained that the folding device 150 may further include some self-locking structures, and when the auxiliary wheel bracket 124 is in the pulled-out state and the folding device 150 is driven to reach the unlocked state, the self-locking structure of the folding device 150 may further be in the locked state. In this case, to fold the cargo bike, the user needs to unlock the self-locking structure, and such a double locking method can be safer, and the user will not be hurt due to the sudden unlocking of the folding device 150 when the auxiliary wheel bracket 124 is pulled out by mistake.

[0041] 7, the auxiliary wheel bracket 124 includes a locking member 1241, a return spring 1242, a sleeve 1243, an ejector rod 1234, and a cam 1245. One end of the locking member 1241 is connected to the return spring 1242, and the other end is connected to the folding device 150. The auxiliary wheel 121 can rotate back and forth in the axial direction around the cam 1245. In the process of the auxiliary wheel 121 rotating back and forth, the cam 1245 exerts an acting force on the ejector rod 1234, so that the ejector rod 1234 slides inside the sleeve 1223, thereby driving the locking member 1241 and the folding device 150 to move.

[0042] Specifically, on the one hand, when the auxiliary wheel 121 rotates forward, the ejector rod 1245 slides forward, and the return spring 1242 drives the locking member 1241 to move forward and engage with the corresponding engagement groove at a predetermined position, at this time the auxiliary wheel bracket 124 is in a retracted state, and the auxiliary wheel 121 and the folding device 150 are both in a clamped state. On the other hand, when the auxiliary wheel 121 rotates backward, the ejector rod 1245 slides forward, and the return spring 1242 drives the locking member 1241 to release the engagement with the corresponding engagement groove, and the folding device 150 and the locking member 1241 are connected, in this case the auxiliary wheel bracket 124 is in an extended state, the auxiliary wheel 121 can contact the ground, and the folding device 150 is connected with the locking member 1241, at this time in an unlocked state.

[0043] The technical features of the embodiments described above may be combined in any manner, and for the sake of brevity, not all possible combinations of the technical features in the above embodiments are described in detail. However, unless there is a contradiction in the combinations of these technical features, all of them should be considered to be within the scope of the description of this specification.

[0044] The above-described embodiments only show some embodiments of the present invention, and the description is detailed and specific, but for that reason it should not be understood as a limitation on the scope of the present invention. It should be noted that those skilled in the art can make some modifications and improvements without departing from the concept of the present invention, all of which are within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be governed by the appended claims. [Explanation of symbols]

[0045] 110: Front frame member 111: Front wheel 120: Intermediate frame member 121: Training wheels 122: Body head tube 123: Steering structure 124: Training wheel bracket 1241: Locking member 1242: Return spring 1243: Sleeve 1244: Ejector rod 1245: Cam 130: Rear frame member 131: Rear wheel 140: Telescopic structure 141: Telescopic rod 142: Locking member 150: Folding device 151: Rotation axis

Claims

1. A cargo bike, a front frame member including at least one front wheel; an intermediate frame member including at least two auxiliary wheels and a steering structure; a rear frame member including at least one rear wheel; an extendable structure that connects the front frame member and the intermediate frame member and that can adjust the distance between the front frame member and the intermediate frame member in a horizontal direction; a folding device that connects the intermediate frame member and the rear frame member and that can adjust a folding state between the rear frame member and the intermediate frame member.

2. 2. The cargo bike according to claim 1, wherein the telescopic stroke of the telescopic structure is greater than 25 cm.

3. 2. The cargo bike according to claim 1, wherein the telescopic structure includes a telescopic rod and a locking member, one end of the telescopic rod is connected to the intermediate frame member, the other end of the telescopic rod is connected to the front frame member, and the locking member is used to control the telescopic stroke of the telescopic rod.

4. 2. The cargo bike according to claim 1, wherein the intermediate frame member further includes a vehicle body head tube, the folding device further includes a rotation shaft, and a center distance between the rotation shaft and the vehicle body head tube is 15 cm or more.

5. 2. The cargo bike according to claim 1, wherein the intermediate frame member includes two training wheels, the two training wheels are installed on both sides of the cargo bike, and the center distance between the two training wheels is greater than 10 cm.

6. 2. The cargo bike according to claim 1, wherein the auxiliary wheels are general mechanical wheels or motor-driven wheels.

7. The cargo bike according to any one of claims 1 to 6, characterized in that the intermediate frame member further includes an auxiliary wheel bracket, and there is an interlocking relationship between the extended / retracted state of the auxiliary wheel bracket and the locked / unlocked state of the folding device.

8. The cargo bike according to claim 7, characterized in that the folding device is in an unlocked state only when the auxiliary wheel bracket is in an extended state.

9. 9. The cargo bike according to claim 8, wherein the auxiliary wheel bracket is connected to the folding device, and when the auxiliary wheel bracket is in an extended state, the folding device can be driven to an unlocked state, and when the auxiliary wheel bracket is in a retracted state, the folding device can be driven to a locked state.

10. 9. The cargo bike according to claim 8, wherein the auxiliary wheel bracket includes a locking member, a return spring, a sleeve, an ejector rod, and a cam, one end of the locking member is connected to the return spring and the other end is connected to the folding device, and the auxiliary wheel can rotate back and forth in an axial direction around the cam.

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