Tricycle frame and electric tricycle

Abstract

The tricycle frame comprises a front tricycle frame body and a rear tricycle frame body, the rear tricycle frame body is located above the rear portion of the front tricycle frame body, a longitudinal distance is reserved between the rear tricycle frame body and the front tricycle frame body, and the rear tricycle frame body is fixedly connected with the front tricycle frame body through a vertical supporting piece; the rear frame comprises at least two symmetrically-arranged first horizontal supporting pieces and a plurality of second horizontal supporting pieces. The second horizontal supporting piece is vertically connected between the two first horizontal supporting pieces; the section of the first horizontal supporting piece and the section of the second horizontal supporting piece are each of a U-shaped structure, and each U-shaped structure is composed of two side faces and a bottom edge. The connecting piece is arranged at the joint of the first horizontal supporting piece and the second horizontal supporting piece and is fixedly riveted with the first horizontal supporting piece and the second horizontal supporting piece respectively.

Description

Technical Field

[0001] The utility model relates to the technical field of tricycle parts, in particular to a tricycle frame and an electric tricycle. Background Art

[0002] The frame is the carrier of the tricycle, which is used to bear the load of the whole vehicle and transmit the vibration excitation from the ground and the motor. The frame is usually in the form of split splicing, including a front frame for carrying the driver and a rear frame for carrying the cargo.

[0003] At present, vehicle frames generally adopt a square tube welded structure. When the vehicle is fully loaded with goods, the rear frame will bear a large weight, the square tube is easy to bend and deform, and the welding part of the square tube is easy to break when the vehicle is heavily loaded and bumpy, which affects the service life of the frame. Utility Model Content

[0004] In order to solve the above technical problems, the utility model provides a three-wheel frame and an electric tricycle. The frame is composed of a supporting component with a U-shaped cross-section, and connecting pieces are arranged at the connection points for reinforcement. At the same time, the supporting component is provided with a force release hole to increase the supporting strength of the frame.

[0005] The technical solution adopted by the utility model is: a three-wheeled frame, comprising

[0006] The front frame includes a rectangular main frame, pedals, a middle beam and a cross beam;

[0007] A rear frame is located above the rear portion of the front frame, a longitudinal distance is left between the rear frame and the front frame, and the rear frame is fixedly connected to the front frame by a vertical support member;

[0008] The rear frame includes at least two symmetrically arranged first horizontal support members and a plurality of second horizontal support members; the second horizontal support members are vertically connected between the two first horizontal support members; the cross-sections of the first horizontal support members and the second horizontal support members are U-shaped structures, and the U-shaped structure consists of two side surfaces and a bottom edge; and also includes a connecting member,

[0009] The connecting member is arranged at the connection between the first horizontal supporting member and the second horizontal supporting member, and is riveted and fixed to the first horizontal supporting member and the second horizontal supporting member respectively.

[0010] Furthermore, the connecting member is a plate-like structure, including a first bottom edge and a second bottom edge, and rivet holes are respectively arranged near the first bottom edge and the second bottom edge. The first bottom edge of the connecting member is connected to the side of the first horizontal support member, and the width of the first bottom edge is greater than the width of the side of the second horizontal support member; the second bottom edge of the connecting member is connected to the side of the second horizontal support member, and the width of the second bottom edge is equal to or slightly greater than the width of the side of the second horizontal support member.

[0011] Furthermore, the connecting member is configured as an isosceles trapezoidal structure or a right-angled trapezoidal structure.

[0012] Further, the distance between the two side surfaces of the first horizontal support member is greater than the distance between the two side surfaces of the second horizontal support member, and the second horizontal support member can be inserted into the U-shaped structure of the first horizontal support member.

[0013] Furthermore, the distance between the two side surfaces of the first horizontal support member is greater than the sum of the distance between the two side surfaces of the second horizontal support member and the thickness of the two connecting members. The second horizontal support member can be inserted into the U-shaped structure of the first horizontal support member, and the connecting members are respectively inserted between the side surfaces of the second horizontal support member and the first horizontal support member.

[0014] Furthermore, the bottom edges of the U-shaped structure of the second horizontal support member are respectively provided with force unloading holes.

[0015] Furthermore, the unloading holes are arranged such that the diameters of the unloading holes near the two ends are larger than the diameter of the unloading hole in the middle; and the unloading holes are arranged symmetrically.

[0016] Furthermore, the main frame is a rectangular structure, the middle beam is fixedly connected to the width center of the main frame, the pedal is installed at the front of the main frame, the cross beam is installed at the lower part of the pedal and intersects with the middle beam vertically, and the middle beam extends from the front end of the front frame to the rear frame, and its rear end is located in the middle of the length of the rear frame.

[0017] Furthermore, the frame is provided with a power box for placing batteries and controllers. The power box is located below the rear frame, with the middle supported and fixed by a center beam and connected and fixed to the rear frame by tie rods around it.

[0018] Furthermore, the thickness of the U-shaped structure is 2.8-3.2 mm.

[0019] An electric tricycle comprises a front part, a frame, a carriage and wheels, wherein the frame adopts the above-mentioned tricycle frame.

[0020] The beneficial effects of the utility model are:

[0021] 1) The overall structure of the rear frame adopts a U-shaped support member, which has strong bending and torsion resistance, can bear greater weight, and increases the strength of the frame;

[0022] 2) The bottom surface of the U-shaped structure is placed longitudinally to bear the load, and a force unloading hole is set on this surface to disperse the pressure and reduce the weight. When loading goods, a vertical impact force or impact force will be generated on the frame. The force is often concentrated, which can easily cause stress concentration at this point, thereby causing damage to the frame structure. The existence of the force unloading hole can disperse this concentrated force to the surrounding area, reduce the stress at this point, improve the stability of the overall structure of the frame, and reduce the weight of the frame;

[0023] 3) A riveted structure is adopted, and the first horizontal support member and the second horizontal support member of the rear frame are riveted together by using connecting pieces. This connection method avoids the appearance of welds and prevents fractures at the welds. Two upper and lower connecting pieces are provided at each riveted joint, which increases the strength of the joint and makes the frame structure more stable. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0025] Figure 2 for Figure 1 A magnified schematic diagram of point A;

[0026] Figure 3 for Figure 1 An enlarged schematic diagram of point B;

[0027] Figure 4 is a schematic structural diagram of a first horizontal support member;

[0028] Figure 5 is a schematic structural diagram of a second horizontal support member;

[0029] Figure 6 It is an isosceles trapezoidal connector;

[0030] Figure 7 It is a right-angle trapezoidal connector.

[0031] In the figure, 1-front frame; 11-main frame 11; 12-pedal 12; 13-middle beam; 14-cross beam; 2-rear frame; 21-first horizontal support member; 22-second horizontal support member; a1-first side; a2-second side; a3-bottom edge; 23-connecting member; b1-first bottom edge; b2-second bottom edge; 24-load unloading hole; 3-vertical support member; 4-power box. DETAILED DESCRIPTION Example

[0032] like Figure 1 As shown, a three-wheel frame includes a front frame 1, a rear frame 2 and a power box 3.

[0033] from Figure 1It can be seen that the front frame 1 includes a rectangular main frame 11, a pedal 12, a middle beam 13 and a cross beam 14. The main frame 11 is a rectangular structure, the middle beam 13 is fixedly connected to the width center of the main frame 11, the pedal 12 is installed at the front of the main frame 11, and the cross beam 14 is installed at the lower part of the pedal 12 to strengthen the support of the pedal, and it intersects with the middle beam 13 vertically. The middle beam 13 extends from the front end of the front frame 1 to the rear frame 2, and its rear end is located in the middle of the length of the rear frame 2.

[0034] The rear frame 2 is located above the rear part of the front frame 1, and there is a distance between the rear frame 2 and the front frame 1. The rear frame 2 is fixedly connected to the front frame 1 by a vertical support member 3. The rear frame 2 and the front frame 1 overlap for a distance in the horizontal direction. The vertical support member 3 is respectively connected between the two corners of the front end of the rear frame 2 and the main frame 11 of the front frame 1, between the middle part of the front side of the rear frame 2 and the middle beam 13, and between the two corners of the rear end of the main frame 11 of the front frame 1 and the rear frame 2.

[0035] Depend on Figure 1-5 It can be seen that the rear frame 2 includes at least two symmetrically arranged first horizontal support members 21, and a plurality of second horizontal support members 22; the second horizontal support members 22 are connected between the two first horizontal support members 21. The rear frame 2 of the utility model is composed of two first horizontal support members 21 and three second horizontal support members 22. The first horizontal support member 21 serves as the frame of the rear frame 21, and its length is greater than the length of the second horizontal support member 22. The second horizontal support members 22 are arranged along the length of the first horizontal support member 22, one of which is connected to the front end of the first horizontal support member 22, the second is connected to the middle of the first horizontal support member 21, and the third is arranged near the rear end of the first horizontal support member 21.

[0036] The cross-section of the first horizontal support member 21 and the second horizontal support member 22 is a U-shaped structure, which is composed of two side surfaces and a bottom edge, and the side surfaces include a first side surface a1 and a second side surface a2. The first side surface a1 and the second side surface a2 of the U-shaped structure are placed horizontally, and the bottom edge a3 is arranged vertically; a connecting member 23 is arranged at the connection between the first horizontal support member 21 and the second horizontal support member 22, and the connecting member 23 is riveted to the first horizontal support member 21 and the second horizontal support member 22 respectively. At the connection between the first horizontal support member 21 and the second horizontal support member 22, riveting holes are arranged on the first side surface a1 and the second side surface a2, respectively.

[0037] The connecting member 23 is a plate-like structure, including a first bottom side b1 and a second bottom side b2. Riveting holes are respectively arranged near the first bottom side b1 and the second bottom side b2. The first bottom side b1 of the connecting member 23 is connected and fixed to the first side a1 and the second side a2 of the first horizontal support member 21 by rivets, and the width of the first bottom side b1 is greater than the width of the side of the second horizontal support member 22; the second bottom side b2 of the connecting member 23 is connected and fixed to the first side a1 and the second side a2 of the second horizontal support member 22 by rivets, and the width of the second bottom side b2 is equal to or slightly greater than the width of the side of the second horizontal support member 22.

[0038] from Figure 6-7 It can be seen that the connecting member 23 at the front end of the first horizontal support member 21 is a right-angled trapezoidal structure; the supporting member 23 at the middle and rear of the first horizontal support member 21 is an isosceles trapezoidal structure. The first bottom side b1 of the connecting member 23 is extended in both directions, increasing the connection area between it and the first horizontal support member 21 and enhancing the stability of the frame structure.

[0039] The distance between the first side a1 and the second side a2 of the first horizontal support member 21 is greater than the distance between the first side a1 and the second side a2 of the second horizontal support member 22 , and the end of the second horizontal support member 22 can be inserted into the U-shaped structure of the first horizontal support member 21 .

[0040] In this embodiment, the distance between the two side surfaces of the first horizontal support member 21 is greater than the sum of the distance between the two side surfaces of the second horizontal support member and the thickness of the two connecting members 23. The end of the second horizontal support member 22 can be inserted into the U-shaped structure of the first horizontal support member 21, and connecting members 23 are respectively arranged between the second horizontal support member 22 and the side surfaces of the first horizontal support member 22.

[0041] A power box 4 for accommodating batteries and controllers is provided below the rear frame 2. The middle portion of the power box 4 is supported and fixed by a center beam 13, and is connected and fixed to the rear frame 22 by tie rods around the power box 4.

[0042] In this embodiment, the thickness of the U-shaped structure is 3.0 mm.

[0043] The thickness of the U-shaped structure may also be 2.8 mm, 2.9 mm, 3.1 mm or 3.2 mm. Example

[0044] like Figure 1 As shown, on the basis of Embodiment 1, the bottom edge a3 of the U-shaped structure of the second horizontal support member 22 is respectively provided with a force unloading hole 24 .

[0045] The unloading holes 24 are arranged such that the diameters of the unloading holes near the two ends of the second horizontal support member 22 are larger than the diameter of the unloading hole in the middle; the unloading holes 24 are arranged symmetrically.

[0046] Practical Example 3

[0047] An electric tricycle comprises a front, a frame, a carriage and wheels, wherein the frame is the tricycle frame described in Example 2 or Example 3.

Claims

1. A three-wheeled frame, comprising: The front frame includes a rectangular main frame, pedals, a middle beam and a cross beam; The rear frame is located above the rear part of the front frame, a longitudinal distance is left between the rear frame and the front frame, and the rear frame is fixedly connected to the front frame by a vertical support member; it is characterized in that: The rear frame includes at least two symmetrically arranged first horizontal support members and a plurality of second horizontal support members; the second horizontal support members are vertically connected between the two first horizontal support members; the cross-sections of the first horizontal support members and the second horizontal support members are U-shaped structures, and the U-shaped structure consists of two side surfaces and a bottom edge; and also includes a connecting member, The connecting member is arranged at the connection between the first horizontal supporting member and the second horizontal supporting member, and is riveted and fixed to the first horizontal supporting member and the second horizontal supporting member respectively.

2. A three-wheeled vehicle frame according to claim 1, characterized in that: The connecting member is a plate-like structure, including a first bottom edge and a second bottom edge. Riveting holes are respectively arranged near the first bottom edge and the second bottom edge. The first bottom edge of the connecting member is connected to the side of the first horizontal support member, and the width of the first bottom edge is greater than the width of the side of the second horizontal support member; the second bottom edge of the connecting member is connected to the side of the second horizontal support member, and the width of the second bottom edge is equal to or slightly greater than the width of the side of the second horizontal support member.

3. A three-wheeled vehicle frame according to claim 2, characterized in that: The connecting piece is configured as an isosceles trapezoidal structure or a right-angled trapezoidal structure.

4. A three-wheeled vehicle frame according to claim 1, characterized in that: The distance between the two side surfaces of the first horizontal support member is greater than the distance between the two side surfaces of the second horizontal support member, and the second horizontal support member can be inserted into the U-shaped structure of the first horizontal support member.

5. A three-wheeled vehicle frame according to claim 1, characterized in that: The distance between the two side surfaces of the first horizontal support member is greater than the sum of the distance between the two side surfaces of the second horizontal support member and the thickness of the two connecting members. The second horizontal support member can be inserted into the U-shaped structure of the first horizontal support member, and connecting members are respectively inserted between the side surfaces of the second horizontal support member and the first horizontal support member.

6. A three-wheeled vehicle frame according to claim 1, characterized in that: The bottom edges of the U-shaped structure of the second horizontal support member are respectively provided with force unloading holes.

7. A three-wheeled vehicle frame according to claim 6, characterized in that: The unloading holes are arranged such that the diameters of the unloading holes near the two ends are larger than the diameter of the unloading hole in the middle; and the unloading holes are arranged symmetrically.

8. A three-wheeled vehicle frame according to claim 1, characterized in that: The main frame is a rectangular structure, the middle beam is fixedly connected to the width center of the main frame, the pedal is installed at the front of the main frame, and the cross beam is installed at the lower part of the pedal, intersecting the middle beam vertically; the middle beam extends from the front end of the front frame to the rear frame, and its rear end is located in the middle of the length of the rear frame; the frame is provided with a power box for placing batteries and controllers, and the power box is located below the rear frame, the middle of which is supported and fixed by the middle beam, and is connected and fixed to the rear frame by tie rods on all sides.

9. A three-wheeled vehicle frame according to claim 1, characterized in that: The thickness of the U-shaped structure is 2.8-3.2 mm.

10. An electric tricycle, comprising a front, a frame, a compartment and wheels, characterized in that: The frame adopts the three-wheel frame described in any one of claims 1 to 9.

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