Frame of electric cargo-carrying bicycle and electric cargo-carrying bicycle

Abstract

The utility model discloses a frame of an electric cargo-carrying bicycle and the electric cargo-carrying bicycle. The device comprises a driving mechanism, a middle pipe, a main beam, a front pipe, a rear beam assembly, a reinforcing pipe fitting and an auxiliary beam. The driving mechanism is used for driving the electric cargo-carrying bicycle. And one end of the main beam is connected with the driving mechanism. And the front pipe is connected with the other end of the main beam. And the rear beam assembly is connected with the driving mechanism. One end of each reinforcing pipe fitting is connected with the rear beam assembly, and the other end of each reinforcing pipe fitting obliquely extends in the direction close to the driving mechanism, bends and bypasses the middle pipe and then is connected to the main beam to form a first connecting point. One end of the auxiliary beam is connected to the front pipe, and the other end is connected with the reinforcing pipe fitting to form a second connection point. The distance between the first connecting point and the driving mechanism is smaller than the distance between the first connecting point and the front pipe. The distance between the second connecting point and the first connecting point is smaller than that between the second connecting point and the middle pipe. The overall bearing capacity of the frame is improved, and the situation that a user is easily stumbled when getting on and off a vehicle is avoided.

Description

Technical Field

[0001] The embodiments of the utility model relate to the technical field of electric cargo bicycles, and more specifically, the utility model relates to a frame of an electric cargo bicycle and an electric cargo bicycle. Background Art

[0002] With the popularization of the concept of green travel and the rapid development of the logistics industry, electric cargo bicycles have been widely used in short-distance cargo transportation, park environment maintenance, recreation and leisure mobility, etc. due to their environmental protection, flexibility and low cost. The frame of an electric bicycle includes a drive mechanism, a middle tube connected to the drive mechanism at one end, a main beam connected to the drive mechanism at one end; a front tube connected to the other end of the main beam, and a rear beam assembly connected to the drive mechanism.

[0003] The existing frames are often designed to be light and simple, resulting in a relatively simple frame structure, which leads to limited overall load-bearing capacity of the frame, making it easy for the frame to deform or break when transporting goods. In addition, due to layout problems, users are prone to contact with the frame when getting on and off the bike, causing tripping or injury, which seriously affects the user experience. Utility Model Content

[0004] In order to solve one or more of the technical problems mentioned above, the utility model provides a frame of an electric cargo bicycle and an electric cargo bicycle, which can improve the overall supporting strength of the frame to enhance the overall load-bearing capacity of the frame, and rearrange the frame to prevent users from easily coming into contact with the frame when getting on and off the vehicle, thereby preventing them from tripping or bumping.

[0005] According to a first aspect of an embodiment of the utility model, a frame of an electric cargo bicycle is provided, comprising:

[0006] A driving mechanism for driving the electric cargo bicycle;

[0007] A middle tube connected to the driving mechanism;

[0008] A main beam, one end of which is connected to the driving mechanism;

[0009] A front pipe connected to the other end of the main beam;

[0010] a rear beam assembly connected to the driving mechanism;

[0011] A reinforcing pipe, one end of which is connected to the rear beam assembly, and the other end of which is inclined to extend toward the driving mechanism and bends around the middle pipe and is connected to the main beam to form a first connection point; and

[0012] A sub-beam, one end of which is connected to the front tube, and the other end of which is connected to the reinforcing tube to form a second connection point;

[0013] Wherein, the distance between the first connection point and the driving mechanism is smaller than the distance between the first connection point and the front tube;

[0014] The distance between the second connection point and the first connection point is smaller than the distance between the second connection point and the middle tube.

[0015] By adding a reinforcing pipe to connect the rear beam assembly of the frame with the main beam of the frame, and increasing the support for the rear beam assembly to disperse the pressure on the rear beam assembly when carrying cargo to the main beam and the reinforcing pipe, the load capacity of the rear beam assembly is improved. By adding a sub-beam to connect the front tube of the frame with the reinforcing pipe, and increasing the support between the front tube and the middle tube of the frame, the force from the rider, the road surface and other parts of the electric cargo bicycle is dispersed to the sub-beam, thereby improving the overall rigidity between the front tube and the middle tube of the frame, thereby improving the overall stability and durability of the frame. Since the other end of the reinforcing tube is inclined and extends toward the direction close to the driving mechanism and bends to bypass the middle tube and then is connected to the main beam to form a first connection point, the other end of the sub-beam is connected to the reinforcing tube to form a second connection point, and the distance between the first connection point and the driving mechanism is smaller than the distance between the first connection point and the front tube, and the distance between the second connection point and the first connection point is smaller than the distance between the second connection point and the middle tube, the position of the second connection point can be as close to the driving mechanism as possible, so that the position of the second connection point can be set lower, making the layout of the frame more ergonomic, making it easier for users to get on and off the vehicle, so as to prevent users from being tripped or bumped by the reinforcing tube or the sub-beam when getting on and off the vehicle, resulting in injuries, thereby improving the user experience and the safety of the frame.

[0016] Furthermore, the main beam and the secondary beam are parallel to each other.

[0017] Furthermore, the reinforcement pipe is connected to the middle pipe.

[0018] Furthermore, the electric cargo bicycle includes a battery pack for providing power to the driving mechanism, the rear beam assembly includes a top beam, a bottom beam connected to the driving mechanism at one end, and a side beam connected to the top beam, the middle tube, the bottom beam and the reinforcing pipe, as well as a receiving cavity surrounded by the top beam, the bottom beam and the side beams and used to place the battery pack.

[0019] Furthermore, a connection position between the side beam and the top beam is closer to the middle tube than a connection position between the side beam and the reinforcing tube.

[0020] Furthermore, the rear beam assembly also includes a plurality of supporting pipes arranged between the top beam and the side beams.

[0021] Furthermore, the rear beam assembly also includes a first mounting tube connected to the side beam and the bottom beam and used to install the battery pack, and a second mounting tube connected to the side beam and the driving mechanism and used to install the battery pack. The first mounting tube and the second mounting tube can separate the accommodating cavity into a first sub-accommodating cavity and a second sub-accommodating cavity.

[0022] Further, the first mounting tube is provided with a first mounting hole for mounting the battery pack; and / or

[0023] The second mounting tube is provided with a second mounting hole for mounting the battery pack.

[0024] Furthermore, the middle tube, the main beam, the front tube, the rear beam assembly, the reinforcing pipe and the sub-beam are all made of aluminum, iron and titanium.

[0025] According to the second aspect of the embodiment of the utility model, there is provided an electric cargo bicycle, which comprises a front wheel, a rear wheel, a seat and a battery pack as well as the frame, wherein the front wheel is arranged on the front tube, the rear wheel and the battery pack are arranged on the rear beam assembly, the seat is arranged on the middle tube, and the battery pack can provide power to the drive mechanism so that the drive mechanism drives the front wheel or the rear wheel to rotate.

[0026] By improving the frame of the electric cargo bicycle, the overall supporting strength of the frame can be increased to improve the overall load-bearing capacity of the frame, and the frame can be rearranged to prevent users from easily coming into contact with the frame when getting on or off the vehicle, causing tripping or bumping. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] By reading the detailed description below with reference to the accompanying drawings, the above and other purposes, features and advantages of the exemplary embodiments of the present invention will become easy to understand. In the accompanying drawings, several embodiments of the present invention are shown in an exemplary and non-limiting manner, and the same or corresponding reference numerals represent the same or corresponding parts, wherein:

[0028] Figure 1 A schematic diagram showing the structure of a frame provided by an embodiment of the utility model is shown;

[0029] Figure 2 A schematic diagram of the structure of the reinforced pipe provided by an embodiment of the utility model is shown;

[0030] Figure 3 A schematic diagram of the structure of the main beam, the front tube and the auxiliary beam provided by an embodiment of the utility model is shown;

[0031] Figure 4The figure shows a schematic structural diagram of a rear beam assembly provided by an embodiment of the utility model.

[0032] 1. Driving mechanism;

[0033] 2. Middle pipe;

[0034] 3. Main beam;

[0035] 4. Front tube;

[0036] 5. rear beam assembly; 51. top beam; 52. bottom beam; 53. side beam; 54. accommodating cavity; 541. first sub-accommodating cavity; 542. second sub-accommodating cavity; 55. supporting pipe; 56. first mounting pipe; 561. first mounting hole; 57. second mounting pipe; 571. second mounting hole;

[0037] 6. Strengthen pipe fittings;

[0038] 7. Auxiliary beam. DETAILED DESCRIPTION

[0039] The following will be combined with the drawings in the embodiments of the present disclosure to clearly and completely describe the technical solutions in the embodiments of the present disclosure. Obviously, the described embodiments are part of the embodiments of the present disclosure, rather than all of the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present disclosure.

[0040] Figure 1 FIG. 1 shows a schematic diagram of the structure of the vehicle frame provided in this embodiment. Figure 2 FIG. 4 shows a schematic diagram of the structure of the reinforcement pipe 6 provided in this embodiment. Figure 1 and Figure 2 As shown, an embodiment of the utility model provides a frame of an electric cargo bicycle, which includes a driving mechanism 1, a middle tube 2, a main beam 3, a front tube 4, a rear beam assembly 5, a reinforcing pipe 6 and a sub-beam 7. The driving mechanism 1 is used to drive the electric cargo bicycle. The middle tube 2 is connected to the driving mechanism 1. One end of the main beam 3 is connected to the driving mechanism 1. The front tube 4 is connected to the other end on the main beam 3. The rear beam assembly 5 is connected to the driving mechanism 1. One end of the reinforcing pipe 6 is connected to the rear beam assembly 5, and the other end extends obliquely toward the driving mechanism 1 and bends around the middle tube 2 and then connects to the main beam 3 to form a first connection point. One end of the sub-beam 7 is connected to the front tube 4, and the other end is connected to the reinforcing pipe 6 to form a second connection point. Among them, the distance between the first connection point and the driving mechanism 1 is less than the distance between the first connection point and the front tube 4. The distance between the second connection point and the first connection point is less than the distance between the second connection point and the middle tube 2.

[0041] By adding a reinforcing pipe 6 to connect the rear beam assembly 5 of the frame with the main beam 3 of the frame, and increasing the support for the rear beam assembly 5 to disperse the pressure on the rear beam assembly 5 when carrying cargo to the main beam 3 and the reinforcing pipe 6, the load-bearing capacity of the rear beam assembly 5 is improved. By adding a sub-beam 7 to connect the front tube 4 of the frame with the reinforcing pipe 6, and increasing the support between the front tube 4 and the middle tube 2 of the frame, the force from the rider, the road surface and other parts of the electric cargo bicycle is dispersed to the sub-beam 7, thereby improving the overall rigidity between the front tube 4 and the middle tube 2 of the frame, and further improving the overall stability and durability of the frame. Since the other end of the reinforcing tube is inclined and extends toward the direction close to the driving mechanism 1 and bends to bypass the middle tube 2 and then is connected to the main beam 3 to form a first connection point, the other end of the sub-beam 7 is connected to the reinforcing tube 6 to form a second connection point, and the distance between the first connection point and the driving mechanism 1 is smaller than the distance between the first connection point and the front tube 4, and the distance between the second connection point and the first connection point is smaller than the distance between the second connection point and the middle tube 2, so that the position of the second connection point can be as close to the driving mechanism 1 as possible, so that the position of the second connection point can be set lower, making the layout of the frame more ergonomic, making it easier for users to get on and off the vehicle, so as to prevent users from being tripped or bumped by the reinforcing tube 6 or the sub-beam 7 when getting on and off the vehicle, resulting in injuries, thereby improving the user experience and the safety of the frame.

[0042] Figure 3 FIG. 2 shows a schematic structural diagram of the main beam 3, the front tube 4 and the auxiliary beam 7 provided in this embodiment. Figure 3 Combined with Figure 1 As shown, the main beam 3 and the sub-beam 7 are parallel to each other, so that the sub-beam 7 can bear and transmit the forces from the rider, the road surface and other parts of the bicycle more evenly. This uniformity helps to reduce local stress concentration and further improve the stability and durability of the overall structure. It also helps to resist bending and torsional deformation during riding, so as to maintain the geometric shape of the frame and improve riding comfort and safety.

[0043] Preferably, the reinforcing pipe 6 is connected to the middle pipe 2 so that the force transmitted from the reinforcing pipe 6 to the main beam 3 can be dispersed to the middle pipe 2 to reduce the pressure on the main beam 3 from the bottom beam 52 assembly, thereby improving the overall stability and durability of the frame.

[0044] In this embodiment, the driving mechanism 1, the middle tube 2, the main beam 3, the front tube 4, the rear beam assembly 5, the reinforcing pipe 6 and the auxiliary beam 7 are connected by welding. Compared with other connection methods (such as integral molding), welding can process and manufacture each component separately and then assemble it, which is more convenient and quick. In other embodiments, other connection methods can also be used, which are not specifically limited in this embodiment. Any connection method that can achieve the above-mentioned effect is within the protection scope of the disclosed embodiment.

[0045] In this embodiment, the middle tube 2, the main beam 3, the front tube 4, the rear beam assembly 5, the reinforcing pipe 6 and the auxiliary beam 7 can be welded into a desired shape by multiple sections of pipes, or can be bent into a desired shape by a single pipe. This embodiment does not specifically limit this, and any formation method that can achieve the respective functions of the middle tube 2, the main beam 3, the front tube 4, the rear beam assembly 5, the reinforcing pipe 6 and the auxiliary beam 7 is within the protection scope of the disclosed embodiment.

[0046] Figure 4 FIG. 5 shows a schematic diagram of the structure of the rear beam assembly 5 provided in this embodiment. Figure 4 Combined with Figure 1 As shown, the electric cargo bicycle includes a battery pack for providing power to a driving mechanism 1, a rear beam assembly 5 includes a top beam 51, a bottom beam 52 connected to the driving mechanism 1 at one end, and a side beam 53 connected to the top beam 51, the middle tube 2, the bottom beam 52 and the reinforcing pipe 6, and a receiving cavity 54 surrounded by the top beam 51, the bottom beam 52 and the side beam 53 and used to place the battery pack. The receiving cavity 54 is formed by using the top beam 51, the bottom beam 52 and the side beam 53 to ensure the overall structural strength of the rear beam assembly 5 so that it can achieve the purpose of carrying goods. At the same time, the space between the top beam 51, the bottom beam 52 and the side beam 53 is reasonably used to place the battery pack to provide power to the driving mechanism 1, and the space utilization rate of the frame is improved, making the overall structure of the frame more compact.

[0047] In this embodiment, the battery pack can be a lead-acid battery, a lithium-ion battery, a nickel-metal hydride battery or a graphene battery. This embodiment does not specifically limit this, and any battery that can provide power for the drive mechanism 1 should be within the protection scope of the disclosed embodiment.

[0048] It should be noted that the driving mechanism 1 mainly includes a motor, a controller, a transmission assembly and a brake assembly to convert the electrical energy of the battery pack into mechanical energy, thereby driving the vehicle forward.

[0049] The connection position between the side beam 53 and the top beam 51 is closer to the middle pipe 2 than the connection position between the side beam 53 and the reinforcing pipe 6, so that the pressure generated by the cargo above the top beam 51 can be transmitted to the reinforcing pipe 6, thereby improving the cargo carrying capacity of the rear beam assembly 5.

[0050] The rear beam assembly 5 further includes a plurality of support pipes 55 disposed between the top beam 51 and the side beams 53 to provide more support for the top beam 51 and further improve the cargo carrying capacity of the rear beam assembly 5 .

[0051] The rear beam assembly 5 also includes a first mounting tube 56 connected to the side beam 53 and the bottom beam 52 and used for mounting the battery pack, and a second mounting tube 57 connected to the side beam 53 and the driving mechanism 1 and used for mounting the battery pack. The first mounting tube 56 and the second mounting tube 57 can separate the accommodating chamber 54 into a first sub-accommodating chamber 541 and a second sub-accommodating chamber 542, so that the accommodating chamber 54 can accommodate more battery packs, and the separation can prevent multiple battery packs from shaking, interfering with each other, and affecting each other during the riding of the electric cargo bicycle.

[0052] The first mounting tube 56 is provided with a first mounting hole 561 for mounting the battery pack, and the second mounting tube 57 is provided with a second mounting hole 571 for mounting the battery pack. This ensures that each battery pack can be fixed, and prevents the battery pack from shaking when the electric cargo bicycle is traveling on a bumpy road, which affects the safety of the electric cargo bicycle and the user's experience.

[0053] Preferably, the middle tube 2, the main beam 3, the front tube 4, the rear beam assembly 5, the reinforcing pipe 6 and the sub-beam 7 are all made of aluminum, iron and titanium, or made of aluminum alloy, iron alloy or titanium alloy. The characteristics of aluminum, iron or titanium can be utilized, and appropriate materials can be selected for manufacturing according to comprehensive considerations such as manufacturing cost, weight, structural strength, processing difficulty or durability in actual production. This embodiment does not specifically limit the materials of the middle tube 2, the main beam 3, the front tube 4, the rear beam assembly 5, the reinforcing pipe 6 and the sub-beam 7. The materials of the common frames in the prior art should be within the protection scope of the embodiments of the present disclosure.

[0054] An embodiment of the utility model also provides an electric cargo bicycle, which includes a front wheel, a rear wheel, a seat and a battery pack as well as the above-mentioned frame. The front wheel is arranged on the front tube 4, the rear wheel and the battery pack are arranged on the rear beam assembly 5, and the seat is arranged on the middle tube 2. The battery pack can provide power to the driving mechanism 1 so that the driving mechanism 1 drives the front wheel or the rear wheel to rotate.

[0055] By improving the frame of the electric cargo bicycle, the overall supporting strength of the frame can be increased to improve the overall load-bearing capacity of the frame, and the frame can be rearranged to prevent users from easily coming into contact with the frame when getting on or off the vehicle, causing tripping or bumping.

[0056] In the above description of the present application, unless otherwise clearly specified and limited, the terms "fixed", "installed", "connected" or "connected" and the like should be understood in a broad sense. For example, with regard to the term "connection", it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal connection of two elements or the interaction relationship between two elements. Therefore, unless otherwise clearly defined in the present application, those skilled in the art can understand the specific meanings of the above terms in the present utility model according to the specific circumstances.

[0057] According to the above description of the present application, those skilled in the art may also understand that the terms used below, such as "upper", "lower" or "radial" and other terms indicating orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings of the present application, and are only for the purpose of facilitating the explanation of the scheme of the present utility model and simplifying the description, rather than explicitly or implicitly indicating that the device or element involved must have the specific orientation, be constructed and operated in a specific orientation. Therefore, the above-mentioned orientation or positional relationship terms cannot be understood or interpreted as limitations on the scheme of the present utility model.

[0058] In addition, the terms "first" or "second" used in this application to refer to numbers or ordinals are only used for descriptive purposes and cannot be understood as explicitly or implicitly indicating relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of this application, the meaning of "plurality" is at least two, such as two, three or more, etc., unless otherwise clearly and specifically defined.

[0059] Although multiple embodiments of the utility model have been shown and described herein, it is obvious to those skilled in the art that such embodiments are provided by way of example only. Those skilled in the art may think of many changes, modifications and alternatives without departing from the idea and spirit of the utility model. It should be understood that in the process of practicing the utility model, various alternatives to the embodiments of the utility model described herein may be adopted. The attached claims are intended to define the scope of protection of the utility model, and therefore cover equivalents or alternatives within the scope of these claims.

Claims

1. A frame of an electric cargo bicycle, characterized in that: It includes: A driving mechanism (1) for driving the electric cargo bicycle; A middle tube (2) connected to the driving mechanism (1); A main beam (3), one end of which is connected to the driving mechanism (1); A front pipe (4) connected to the other end of the main beam (3); A rear beam assembly (5) connected to the driving mechanism (1); A reinforcing pipe (6), one end of which is connected to the rear beam assembly (5), and the other end of which extends obliquely in a direction close to the driving mechanism (1) and bends around the middle pipe (2) and is then connected to the main beam (3) to form a first connection point; and A secondary beam (7), one end of which is connected to the front pipe (4), and the other end of which is connected to the reinforcing pipe (6) to form a second connection point; Wherein, the distance between the first connection point and the driving mechanism (1) is smaller than the distance between the first connection point and the front tube (4); The distance between the second connection point and the first connection point is smaller than the distance between the second connection point and the middle tube (2).

2. The frame according to claim 1, characterized in that: The main beam (3) and the secondary beam (7) are parallel to each other.

3. The frame according to claim 1, characterized in that: The reinforcing pipe member (6) is connected to the middle pipe (2).

4. The frame according to claim 1, characterized in that: The electric cargo bicycle comprises a battery pack for providing power to the driving mechanism (1), the rear beam assembly (5) comprises a top beam (51), a bottom beam (52) connected to the driving mechanism (1) at one end, a side beam (53) connected to the top beam (51), the middle tube (2), the bottom beam (52) and the reinforcing pipe (6), and a receiving cavity (54) enclosed by the top beam (51), the bottom beam (52) and the side beam (53) and used for accommodating the battery pack.

5. The frame according to claim 4, characterized in that: The connection position between the side beam (53) and the top beam (51) is closer to the middle pipe (2) than the connection position between the side beam (53) and the reinforcing pipe (6).

6. The frame according to claim 4, characterized in that: The rear beam assembly (5) further comprises a plurality of supporting pipes (55) arranged between the top beam (51) and the side beams (53).

7. The frame according to claim 4, characterized in that: The rear beam assembly (5) further comprises a first mounting tube (56) connected to the side beam (53) and the bottom beam (52) and used for mounting the battery pack, and a second mounting tube (57) connected to the side beam (53) and the drive mechanism (1) and used for mounting the battery pack, wherein the first mounting tube (56) and the second mounting tube (57) are capable of dividing the accommodating chamber (54) into a first sub-accommodating chamber (541) and a second sub-accommodating chamber (542).

8. The frame according to claim 7, characterized in that: The first mounting tube (56) is provided with a first mounting hole (561) for mounting the battery pack; and / or The second mounting tube (57) is provided with a second mounting hole (571) for mounting the battery pack.

9. The frame according to claim 1, characterized in that: The middle tube (2), the main beam (3), the front tube (4), the rear beam assembly (5), the reinforcing pipe (6) and the auxiliary beam (7) are all made of aluminum, iron and titanium.

10. An electric cargo bicycle, characterized in that: The vehicle comprises a front wheel, a rear wheel, a seat and a battery pack, and a frame as described in any one of claims 1 to 9, wherein the front wheel is arranged on the front tube (4), the rear wheel and the battery pack are arranged on the rear beam assembly (5), the seat is arranged on the middle tube (2), and the battery pack can provide power for the drive mechanism (1) so that the drive mechanism (1) drives the front wheel or the rear wheel to rotate.

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