Frame and cargo-carrying bicycle

Abstract

The utility model discloses a frame and a cargo-carrying bicycle, and relates to the technical field of cargo-carrying bicycles. The frame comprises a main body supporting assembly, the main body supporting assembly comprises a lower pipe, a seat pipe and a steering vertical pipe, the seat pipe and the steering vertical pipe are both connected to the lower pipe and located on the same side of the lower pipe, and the lower pipe extends in the direction, away from the seat pipe, of the steering vertical pipe in the axis direction of the lower pipe and forms a bearing pipe; the carrying tube can place a cargo carrying piece longer than the carrying tube. The utility model further discloses a cargo carrying bicycle. By means of the innovative structural design, the bicycle can be suitable for installation of various types of goods buckets, compared with a traditional bicycle, on the basis of the same bicycle body length, the larger goods carrying space and capacity are achieved, and the whole bicycle production cost and the logistics transportation cost can be effectively controlled.

Description

Technical Field

[0001] This application relates to the field of cargo bicycles, and more particularly to a frame and a cargo bicycle. Background Technology

[0002] In today's transportation sector, cargo bicycles are favored by consumers due to their convenience, environmental friendliness, and affordability, making them a popular choice for urban commuting and short-distance travel. Currently, electric cargo bicycles are the most widely used type in the cargo transportation field.

[0003] Electric cargo bicycles are practical vehicles that incorporate an electric drive system into the traditional bicycle. They are generally powered by batteries and assisted by a motor. Electric cargo bicycles retain the flexibility and portability of bicycles while enhancing their cargo carrying capacity.

[0004] Typically, the structure of an electric cargo bicycle includes a frame, cargo compartment, handlebars, front and rear wheels and braking system, power supply and drive system, and other accessories such as pedals. The frame is the main structure of the electric cargo bicycle, usually made of metal materials such as aluminum alloy or steel, and it is used to support the body and install other components. The cargo compartment is the main component that distinguishes electric cargo bicycles from ordinary bicycles, and it is generally a cargo box or cargo frame.

[0005] The length of a cargo unit from the front wheel to the rear wheel reflects its actual carrying capacity to a certain extent; generally, the longer the length, the greater the carrying capacity.

[0006] A typical electric cargo bicycle frame includes a front fork assembly for mounting the front wheel, a main support assembly for carrying loads, and a rear fork assembly for mounting the rear wheel. The main support assembly includes a down tube, seat tube, and top tube connected in sequence. The down tube is also connected to a steering seat tube, which typically houses a steering lever for mounting the handlebars. The steering lever is also connected to a drivetrain to control the rotation of the front wheel. The steering seat tube is connected to the seat tube via the top tube. The left end of the down tube extends to the left and has an upward bend that connects to the front fork assembly. The right end of the down tube extends and connects to the rear fork assembly. The cargo unit is mounted on the down tube and located between the bend and the steering seat tube.

[0007] Designers aim to achieve greater load capacity while controlling costs. Typically, increasing load capacity requires lengthening the load-bearing components. To ensure stable installation of these components, the length of the lower tube section between the seat tube and the bend needs to be increased accordingly. The longer the tube, the more material is used in its manufacture, leading to higher overall costs. Utility Model Content

[0008] In order to achieve greater cargo capacity while controlling costs, this application provides a frame and a cargo bicycle.

[0009] On the one hand, the frame provided in this application adopts the following technical solution:

[0010] A frame, comprising:

[0011] The main support assembly includes a lower tube, a seat tube, a steering riser tube, and a head tube. The seat tube and the steering riser tube are both connected to the lower tube and are located on the same side of the lower tube. The lower tube extends along its own axis toward the steering riser tube away from the seat tube and forms a load-bearing tube. The load-bearing tube is configured to hold a cargo item longer than the length of the load-bearing tube. The head tube is connected to the end of the load-bearing tube away from the seat tube.

[0012] A fork assembly connected to the head tube, the fork assembly being located on the side of the downtube away from the steering seat tube;

[0013] The rear fork assembly is connected to the end of the downtube furthest from the front fork assembly and the seatpost.

[0014] By adopting the above technical solution, a cargo component that is longer than the bearing tube can be placed on the bearing tube. At this time, part of the cargo component will be suspended in the air, and the bearing tube does not need to be extended accordingly based on the length of the cargo component. This ensures a large cargo carrying capacity while controlling costs. Of course, in actual design, it is necessary to ensure that the cargo component does not protrude too much from the bearing tube, so as to make the center of gravity unstable.

[0015] In one specific implementation, a steering control assembly is also included, located on one side of the carrier tube, and configured to enable the handlebars to control the rotation of the front wheel.

[0016] By adopting the above technical solution, the steering control component is placed on the outside of the load-bearing tube to prevent the load-bearing tube from bending due to long-term heavy loads, thus affecting the structure of the steering control component. In addition, this design facilitates the maintenance of the steering control mechanism.

[0017] In one specific implementation, the steering control assembly includes a first rotating element and a steering rod, the steering rod being connected to the handlebars, and the first rotating element being connected to the steering rod; the fork assembly is rotatably connected to the head tube, the fork assembly is connected to a second rotating element, a steering linkage is provided on one side of the load-bearing tube, one end of the steering linkage is rotatably connected to the first rotating element, and the other end is rotatably connected to the second rotating element, the steering linkage being configured to enable the first rotating element and the second rotating element to rotate synchronously.

[0018] By adopting the above technical solution, turning the handlebars can drive rotating component one to rotate, which in turn drives rotating component two to rotate via the steering linkage, thereby steering the front wheel.

[0019] In one specific implementation, the steering riser is equipped with a limiting component, and the rotating component is equipped with a rotating abutment.

[0020] And / or, the fork assembly is equipped with a limiting member, and the rotating member two is equipped with a rotating abutment;

[0021] The limiting member is configured to limit the rotation angle of the rotating abutment.

[0022] By adopting the above technical solution, the rotation angle of the rotating abutment is limited by setting a limiting component, which restricts the rotation angle of the front wheel. This design is used to prevent the front wheel steering angle from being too large and causing danger.

[0023] In one specific implementation, the limiting member is a limiting post, and there are two limiting posts, which are located on both sides of the rotating abutment on the rotation path of the rotating abutment.

[0024] In one specific implementation, the rotating abutment can rotate at an angle of 60°-180°.

[0025] In one specific implementation, the support pipe and the lower pipe are a single unit.

[0026] By adopting the above technical solutions, the structural strength was improved.

[0027] On the other hand, this application also provides a cargo bicycle, including the aforementioned frame, and further comprising:

[0028] The front wheel is connected to the front fork assembly;

[0029] The rear wheel is connected to the rear fork assembly;

[0030] The saddle is connected to the seat post.

[0031] In one specific implementation, the axis of the lower tube is inclined to the line connecting the center of the front wheel to the center of the rear wheel.

[0032] By adopting the above technical solution, since the front fork assembly is located on the side of the load tube away from the seat tube, when installing the front and rear wheels, the down tube needs to be tilted along the line connecting the center of the front wheel to the center of the rear wheel in order to ensure that the front and rear wheels are arranged in a horizontal direction to meet the usage requirements.

[0033] In summary, this application includes at least one of the following beneficial technical effects:

[0034] 1. In this application, a cargo component longer than the support tube can be placed on the support tube, at which point a part of the cargo component will be suspended in the air. The support tube does not need to be extended accordingly based on the length of the cargo component, which ensures a large cargo carrying capacity while controlling costs. Of course, in actual design, it is necessary to ensure that the cargo component does not protrude too much from the support tube so as to cause instability of the center of gravity.

[0035] 2. Turning the handlebars can drive rotating component one to rotate, which in turn drives rotating component two to rotate via the steering linkage, thereby steering the front wheel. The two limit posts can limit the rotation angle of the rotating abutment, thus limiting the rotation angle of the front wheel. This design is used to prevent the user from operating the front wheel at an excessively large angle, which could cause danger.

[0036] 3. Based on the innovative structural design, compared with the body length of a traditional bicycle, this application can obtain a larger cargo space. In addition, different types of cargo boxes can be installed in the cargo space to meet different transportation needs. Attached Figure Description

[0037] Figure 1 This is a schematic diagram of the overall structure of a vehicle frame according to an embodiment of this application.

[0038] Figure 2 yes Figure 1 Enlarged view of section A.

[0039] Figure 3 This is a structural schematic diagram of a cargo bicycle according to an embodiment of this application.

[0040] Explanation of reference numerals in the attached drawings: 1. Main support assembly; 11. Down tube; 12. Seat tube; 13. Steering seat tube; 131. Steering rod; 14. Top tube; 15. Head tube; 2. Load-bearing tube; 3. Front fork assembly; 4. Rear fork assembly; 5. Steering control assembly; 51. Rotating component one; 52. Rotating component two; 53. Steering linkage; 54. Limiting post; 55. Rotating stop; 6. Front wheel; 61. Rear wheel; 62. Saddle; 63. Handlebar. Detailed Implementation

[0041] The present application will be further described in detail below with reference to the accompanying drawings.

[0042] This application discloses a vehicle frame. It is designed to achieve the greatest possible cargo capacity while controlling costs, specifically by maximizing the length of the load-bearing components that can be installed while controlling the length of the lower tube.

[0043] Reference Figure 1A vehicle frame includes a main support assembly 1, which includes a downtube 11, a seat tube 12, a steering riser 13, a top tube 14, and a head tube 15. The steering riser 13 and seat tube 12 are arranged from left to right and are both located above the downtube 11. The top tube 14 is located between the steering riser 13 and the seat tube 12, with its left end connected to the steering riser 13 and its right end connected to the seat tube 12. The head tube 15 is connected to the left end of a support tube 2. The downtube 11, seat tube 12, steering riser 13, top tube 14, and head tube 15 are all welded together. The seat tube 12 is used to mount the saddle. The lower tube 11 extends to the left along its own axis to form a support tube 2. The support tube 2 is used to support and place cargo items, which are usually cargo boxes or cargo frames. Generally, the cargo items are connected to the support tube 2 by welding or bolting. In order to ensure structural strength, the support tube 2 and the lower tube 11 are integrated. The support tube 2 is configured to hold cargo items that are longer than the support tube 2. In this case, the left end of the cargo item is usually suspended. In addition, in order to ensure the stability of the cargo item installation, the connection between the cargo item and the support tube 2 is usually not limited to bolting, hooking, hinged and welding.

[0044] Reference Figure 1 A frame also includes a front fork assembly 3 and a rear fork assembly 4. The front fork assembly 3 is rotatably connected to the head tube 15 and is located below the down tube 11. The rear fork assembly 4 is connected to the end of the down tube 11 away from the front fork assembly 3 and is also connected to the seat tube 12. The front fork assembly 3 is used to mount the front wheel, and the rear fork assembly 4 is used to mount the rear wheel. The specific structures of the front fork assembly 3 and the rear fork assembly 4 are existing technologies and will not be described in detail here.

[0045] In this application, in order to prevent the overall frame structure from being too long, the length of the bearing tube 2 is slightly longer than the length of the lower tube 11 located between the steering riser tube 13 and the seat tube 12. In order to ensure the stable installation of the cargo component, in this embodiment, the length of the cargo component is 1 to 1.5 times the length of the bearing tube 2. Of course, in other embodiments, it can be 1.5 to 2 times or more, but it is necessary to ensure the stability of the center of gravity after loading the cargo.

[0046] Reference Figure 1 The frame also includes a steering control assembly 5, which is located on the lower side of the support tube 2. Typically, a steering rod 131 is provided inside the steering seat tube 13. The lower end of the steering rod 131 is connected to the steering control assembly 5, and the upper end of the steering rod 131 is fitted with a handlebar. The end of the steering control assembly 5 away from the steering seat tube 13 is connected to the front fork assembly 3. The handlebar can control the rotation of the front wheel through the steering control assembly 5.

[0047] Reference Figure 1 and Figure 2The steering control assembly 5 includes a first rotating member 51 connected to the steering rod 131. The first rotating member 51 can rotate with the handlebars. The front fork assembly 3 is connected to a second rotating member 52, which can rotate with the front wheel. A steering linkage 53 is provided on one side of the bearing tube 2. One end of the steering linkage 53 is rotatably connected to the first rotating member 51, and the other end is rotatably connected to the second rotating member 52. The steering linkage 53 enables the first rotating member 51 and the second rotating member 52 to rotate synchronously.

[0048] Reference Figure 1 and Figure 2 In this embodiment, the steering riser 13 is equipped with a limiting component, and the rotating component 51 is equipped with a rotating abutment 55. The limiting component can limit the rotation angle of the rotating abutment 55. Specifically, the limiting component is a limiting post 54, and there are two limiting posts 54. The two limiting posts 54 are located on both sides of the rotating abutment 55 on its rotation path. In order to prevent the handlebars from rotating too far and causing danger to the user, the rotation angle that the rotating abutment 55 can rotate is generally set to 60°-180°. In other embodiments, two limiting posts 54 can be installed simultaneously or separately on the front fork assembly 3, and the rotating abutment 55 can be installed on the rotating component 52. The two limiting posts 54 are used to limit the rotating abutment, thereby directly limiting the rotation angle of the front wheel.

[0049] Of course, the frame of this application can be applied not only to cargo bicycles but also to other non-electric cargo vehicles.

[0050] The implementation principle of a vehicle frame in this application embodiment is as follows: by installing the cargo component on the bearing tube 2 and suspending the left end of the cargo component, the length of the cargo component that can be installed is increased as much as possible while controlling costs.

[0051] This embodiment also discloses a cargo bicycle, referring to... Figure 3 The vehicle includes one of the frame design options described above, as well as a front wheel 6, a rear wheel 61, a saddle 62, and a handlebar 63. The front wheel 6 is connected to the front fork assembly 3, the rear wheel 61 is connected to the rear fork assembly 4, and the handlebar 63 is connected to the steering column 131. To ensure structural stability and ease of installation, the axis of the downtube 11 is inclined to the line connecting the center of the front wheel 6 to the center of the rear wheel 61. Therefore, after the cargo bicycle is placed on the ground, the downtube 11 is inclined to the ground, and the downtube 11 is inclined from top to bottom from the front wheel 6 to the rear wheel 61.

[0052] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A vehicle frame, characterized in that: include: The main support assembly (1) includes a lower tube (11), a seat tube (12), a steering riser (13), and a head tube (15). The seat tube (12) and the steering riser (13) are both connected to the lower tube (11) and are located on the same side of the lower tube (11). The lower tube (11) extends along its own axis toward the steering riser (13) away from the seat tube (12) and forms a support tube (2). The support tube (2) is configured to hold a cargo piece longer than the length of the support tube (2). The head tube (15) is connected to the end of the support tube (2) away from the seat tube (12). A fork assembly (3) is connected to the head tube (15), the fork assembly (3) being located on the side of the down tube (11) away from the steering seat tube (13); The rear fork assembly (4) is connected to the end of the downtube (11) away from the front fork assembly (3) and the seat tube (12).

2. A vehicle frame according to claim 1, characterized in that: It also includes a steering control assembly (5) located on one side of the support tube (2), the steering control assembly (5) being configured to enable the handlebars (63) to control the rotation of the front wheel (6).

3. A vehicle frame according to claim 2, characterized in that: The steering control assembly (5) includes a rotating component (51) and a steering rod (131). The steering rod (131) is used to connect with the handlebars, and the rotating component (51) is connected to the steering rod (131). The fork assembly (3) is rotatably connected to the head tube (15). The fork assembly (3) is connected to a rotating component (52). A steering linkage (53) is provided on one side of the bearing tube (2). One end of the steering linkage (53) is rotatably connected to the rotating component (51), and the other end is rotatably connected to the rotating component (52). The steering linkage (53) is configured to enable the rotating component (51) and the rotating component (52) to rotate synchronously.

4. A vehicle frame according to claim 3, characterized in that: The steering riser (13) is equipped with a limiting component, and the rotating component (51) is equipped with a rotating abutment (55); And / or, the fork assembly (3) is equipped with a limiting member, and the rotating member (52) is equipped with a rotating abutment (55); The limiting member is configured to limit the rotation angle of the rotating abutment (55).

5. A vehicle frame according to claim 4, characterized in that: The limiting member is a limiting post (54), and there are two limiting posts (54). The two limiting posts (54) are located on both sides of the rotating abutment (55) on the rotation path of the rotating abutment (55).

6. A frame according to any one of claims 4 or 5, characterized in that: The rotating abutment (55) can rotate at an angle of 60°-180°.

7. A frame according to any one of claims 1-5, characterized in that: The bearing pipe (2) and the lower pipe (11) are a single unit.

8. A cargo bicycle, characterized in that: Including a frame as described in any one of claims 1-7, further comprising: The front wheel (6) is connected to the front fork assembly (3); The rear wheel (61) is connected to the rear fork assembly (4); The saddle (62) is connected to the seat post (12).

9. A cargo bicycle according to claim 8, characterized in that: The axis of the lower tube (11) is inclined to the line connecting the center of the front wheel (6) to the center of the rear wheel (61).

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