Vehicle frame

Abstract

The frame comprises a main beam pipe, two side pipe assemblies and a series pipe, each side pipe assembly comprises a lower side pipe, the lower side pipe comprises a first straight pipe, a second straight pipe and a third straight pipe which are sequentially connected, the first straight pipe is inclined, the top end of the first straight pipe is fixedly connected with the side wall of the main beam pipe, the second straight pipe is parallel to the main beam pipe, and the third straight pipe is parallel to the main beam pipe. The third straight pipes are arranged in the length direction of the electric vehicle, the cross section of the series connection pipe is rectangular, the series connection pipe vertically penetrates through the main beam pipe in a sleeving mode, the two ends of the series connection pipe are fixedly connected with the adjacent second straight pipes respectively, the middle of the series connection pipe is fixedly connected with the main beam pipe, and the rectangular series connection pipe can structurally limit front-back swing of the main beam pipe. When the main beam pipe is subjected to large thrust in the advancing direction, the additional limiting force except the welding position is provided, the pressure borne by the welding position of the lower side pipe is shared, the lower side pipe is helped to support the main beam pipe, the welding position of the main beam pipe and the lower side pipe is prevented from being broken easily, and the safety of the frame is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of electric vehicles, in particular to a vehicle frame. Background Art

[0002] An electric vehicle is a mechatronic vehicle that uses batteries as auxiliary energy sources and is based on an ordinary bicycle and is equipped with motors, controllers, batteries, handlebars, brake handles and other operating components and a display instrument system. The frame is the load-bearing part of the electric vehicle and is one of the main components of the electric vehicle. The quality of the electric vehicle frame will be directly related to its safety during use. As a component of the frame, the connection strength between the main beam tube and the side tube plays a decisive role in the overall structural stability of the frame. Common frame side tubes are generally welded on both sides of the main beam tube.

[0003] However, although the side tubes on both sides can effectively suppress the left and right swing of the main beam tube, when the main beam tube is subjected to a large thrust in the direction of travel, it is often difficult to support the main beam tube by welding points alone. The welding points between the main beam tube and the side tubes are prone to breakage, posing certain safety hazards. Utility Model Content

[0004] In view of this, the utility model provides a frame for solving the problem that when the main beam tube of the frame in the prior art is subjected to a large thrust in the traveling direction, it is often difficult to support the main beam tube by welding points alone, and the welding points between the main beam tube and the side tubes are prone to breakage, posing certain safety hazards.

[0005] In order to achieve one or part or all of the above-mentioned purposes or other purposes, the utility model proposes a frame, including a main beam tube, two side tube assemblies and a series tube, the two side tube assemblies are symmetrically arranged on both sides of the main beam tube, the side tube assembly includes a lower side tube, the lower side tube includes a first straight tube, a second straight tube and a third straight tube connected in sequence, the first straight tube is inclined to form an angle with the main beam tube, and its top end is fixedly connected to the side wall of the main beam tube, the second straight tube is parallel to the main beam tube, the third straight tube is arranged along the length direction of the electric vehicle, the cross-section of the series tube is rectangular, the series tube is vertically inserted into the main beam tube, the two ends of the series tube are respectively fixedly connected to the adjacent second straight tubes, and the middle part of the series tube is fixedly connected to the main beam tube.

[0006] Preferably, one end of the third straight tube away from the second straight tube is continuously bent upward to form a fourth straight tube and a fifth straight tube in sequence, and the fourth straight tube is arranged to be inclined upward.

[0007] Preferably, a connecting plate is fixedly connected to the lower side wall of the connection between the third straight tube and the fourth straight tube, and the first reinforcing tube, the second reinforcing tube and the third reinforcing tube are fixedly connected between the two connecting plates respectively.

[0008] Preferably, a fourth reinforcing tube is fixedly connected between ends of the two fourth straight tubes away from the third straight tube.

[0009] Preferably, the side tube assembly also includes an upper side tube, which is arranged above the lower side tube and along the length direction of the electric vehicle, one end of the upper side tube is fixedly connected to the second straight tube, and the other end of the upper side tube is fixedly connected to the fourth straight tube.

[0010] Preferably, the cross section of the upper side tube is square, and a plurality of mounting holes are distributed on the top wall of the upper side tube along the length direction.

[0011] Preferably, a plurality of ribs are fixedly connected between the upper side tube and the lower side tube.

[0012] Preferably, a lifting lug is installed on the side of the fifth straight tube facing away from the main beam tube.

[0013] Preferably, a fifth reinforcement tube is fixedly connected between the two lifting ears.

[0014] Preferably, a head pipe is provided above the main beam pipe, the head pipe is arranged obliquely, and the top end of the main beam pipe is fixedly connected to the side wall of the head pipe.

[0015] Implementing the embodiments of the present utility model will have the following beneficial effects:

[0016] After adopting the above-mentioned frame, the side wall of the main beam tube and the top of the first straight tube, the side wall of the main beam tube and the side wall of the series tube, and the two ends of the series tube and the corresponding side walls of the second straight tube are all connected by welding, so that the two lower side tubes support the main beam tube through the corresponding first straight tube, and on this basis, the second straight tube and the main beam tube are connected by the series tube, so that the two first straight tubes, the two second straight tubes and the series tube form a fixed triangular structure, which effectively suppresses the left and right swing of the main beam tube. At the same time, the rectangular series tube can structurally limit the front and rear swing of the main beam tube, provide additional limiting force except for the welding position, and share the pressure on the welding position of the lower side tube when the main beam tube is subjected to a large thrust in the direction of travel, so as to help the lower side tube support the main beam tube, avoid the welding position between the main beam tube and the lower side tube from being easily broken, and improve the safety of the frame. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] in:

[0019] Figure 1 It is a three-dimensional diagram of the utility model;

[0020] Figure 2 It is a side view of the utility model.

[0021] In the figure: 1. main beam tube; 2. side tube assembly; 3. lower side tube; 31. first straight tube; 32. second straight tube; 33. third straight tube; 34. fourth straight tube; 35. fifth straight tube; 4. upper side tube; 41. mounting hole; 5. series tube; 6. connecting plate; 71. first reinforcing tube; 72. second reinforcing tube; 73. third reinforcing tube; 74. fourth reinforcing tube; 75. fifth reinforcing tube; 76. rib sheet; 8. lifting ear; 9. head tube. DETAILED DESCRIPTION

[0022] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by technicians in the technical field of the present invention; the terms used in the specification of the application herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention; the terms "including" and "having" and any variations thereof in the specification and claims of the present invention and the above-mentioned drawings are intended to cover non-exclusive inclusions. The terms "first", "second", etc. in the specification and claims of the present invention or the above-mentioned drawings are used to distinguish different objects, not to describe a specific order.

[0023] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present invention. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0024] In order to enable those skilled in the art to better understand the solution of the utility model, the technical solution in the embodiments of the utility model will be clearly and completely described below in conjunction with the accompanying drawings.

[0025] like Figure 1-2As shown, a vehicle frame comprises a main beam tube 1, two side tube assemblies 2 and a series tube 5, the two side tube assemblies 2 are symmetrically arranged on both sides of the main beam tube 1, the side tube assembly 2 comprises a lower side tube 3, the lower side tube 3 comprises a first straight tube 31, a second straight tube 32 and a third straight tube 33 which are connected in sequence, the first straight tube 31 is inclined to form an angle with the main beam tube 1, and its top end is fixedly connected to the side wall of the main beam tube 1, the second straight tube 32 is parallel to the main beam tube 1, the third straight tube 33 is arranged along the length direction of the electric vehicle, the cross section of the series tube 5 is rectangular, the series tube 5 is vertically inserted into the main beam tube 1, the two ends of the series tube 5 are respectively fixedly connected to the adjacent second straight tube 32, the middle part of the series tube 5 is fixedly connected to the main beam tube 1, the side wall of the main beam tube 1 is connected to the top of the first straight tube 31, the side wall of the main beam tube 1 The wall and the side wall of the series tube 5, and the two ends of the series tube 5 and the corresponding side walls of the second straight tube 32 are connected by welding, so that the two lower side tubes 3 support the main beam tube 1 through the corresponding first straight tube 31, and on this basis, the series tube 5 is used to connect the second straight tube 32 and the main beam tube 1, so that the two first straight tubes 31, the two second straight tubes 32 and the series tube 5 form a fixed triangular structure, which effectively suppresses the left and right swing of the main beam tube 1. At the same time, the rectangular series tube 5 can structurally limit the front and rear swing of the main beam tube 1, and provide additional limiting force except for the welding position. When the main beam tube 1 is subjected to a large thrust in the direction of travel, the pressure on the welding position of the lower side tube 3 is shared, and the lower side tube 3 is helped to support the main beam tube 1, so as to avoid the welding position between the main beam tube 1 and the lower side tube 3 from being easily broken, thereby improving the safety of the frame.

[0026] Furthermore, one end of the third straight tube 33 away from the second straight tube 32 is continuously bent upward to form a fourth straight tube 34 and a fifth straight tube 35 in sequence. The fourth straight tube 34 is tilted upward to increase the support structure of the rear half of the frame, providing more support points for the rear half of the electric vehicle.

[0027] Furthermore, a connecting plate 6 is fixedly connected to the lower side wall at the connection between the third straight tube 33 and the fourth straight tube 34, and a first reinforcing tube 71, a second reinforcing tube 72 and a third reinforcing tube 73 which are parallel to each other are fixedly connected between the two connecting plates 6, and the vertical lines therebetween form a triangle, so as to improve the connection strength of the middle parts of the two lower side tubes 3 through the connecting plate 6, the first reinforcing tube 71, the second reinforcing tube 72 and the third reinforcing tube 73, improve the structural stability of the rear half of the frame, and improve the load-bearing and pressure resistance of the frame.

[0028] Furthermore, a fourth reinforcing tube 74 is fixedly connected between the ends of the two fourth straight tubes 34 away from the third straight tube 33 , so as to improve the connection strength of the rear half of the two lower side tubes 3 through the fourth reinforcing tube 74 and enhance the structural stability of the lower side tubes 3 .

[0029] Furthermore, the side tube assembly 2 also includes an upper side tube 4, which is arranged above the lower side tube 3 and along the length direction of the electric vehicle. One end of the upper side tube 4 is fixedly connected to the second straight tube 32, and the other end of the upper side tube 4 is fixedly connected to the fourth straight tube 34, so as to reinforce the lower side tube 3 through the upper side tube 4, further increase the support points on the side of the frame, and improve the compressive resistance of the side of the frame.

[0030] Furthermore, the cross-section of the upper tube 4 is square, and a plurality of mounting holes 41 are distributed along the length direction on the top wall of the upper tube 4. The traditional frame adopts a circular upper tube 4, and the electric vehicle components need to be connected to the mounting holes 41 through stamping parts with matching contours. The side of the square upper tube 4 of the utility model is flat, which is convenient for users to screw it to the mounting holes 41 through screws, and directly install battery boxes, pressure strips and other components on the upper tube 4 without using stamping parts, thereby effectively reducing the assembly cost of electric vehicles.

[0031] Furthermore, a plurality of ribs 76 are fixedly connected between the upper side tube 4 and the lower side tube 3 , so as to further strengthen the connection between the upper side tube 4 and the lower side tube 3 through the ribs 76 , thereby making both sides of the frame more stable.

[0032] Furthermore, a lifting lug 8 is installed on the side of the fifth straight tube 35 facing away from the main beam tube 1 , and the lifting lug 8 can be used to install a rear shock absorber of the electric vehicle.

[0033] Furthermore, a fifth reinforcing tube 75 is fixedly connected between the two lifting ears 8 , so as to connect the two fifth straight tubes 35 via the fifth reinforcing tube 75 and the lifting ears 8 , thereby enhancing the structural stability of the rear end of the lower side tube 3 .

[0034] Furthermore, a head pipe 9 is provided above the main beam pipe 1 . The head pipe 9 is arranged obliquely, and the top end of the main beam pipe 1 is fixedly connected to the side wall of the head pipe 9 .

[0035] Obviously, the embodiments described above are only some embodiments of the utility model, rather than all embodiments. The preferred embodiments of the utility model are given in the accompanying drawings, but they do not limit the patent scope of the utility model. The utility model can be implemented in many different forms. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the utility model more thorough and comprehensive. Although the utility model is described in detail with reference to the aforementioned embodiments, for those skilled in the art, it is still possible to modify the technical solutions recorded in the aforementioned specific implementation methods, or to replace some of the technical features therein with equivalents. Any equivalent structure made using the contents of the utility model specification and the accompanying drawings, directly or indirectly used in other related technical fields, is also within the scope of patent protection of the utility model.

Claims

1. A frame, characterized in that: include: The main beam tube, two side tube assemblies and the tandem tube; The two side tube assemblies are symmetrically arranged on both sides of the main beam tube, the side tube assembly includes a lower side tube, the lower side tube includes a first straight tube, a second straight tube and a third straight tube connected in sequence, the first straight tube is inclined to form an angle with the main beam tube, and the top end thereof is fixedly connected to the side wall of the main beam tube, the second straight tube is parallel to the main beam tube, and the third straight tube is arranged along the length direction of the electric vehicle; The cross section of the series pipe is rectangular, the series pipe is vertically inserted into the main beam pipe, the two ends of the series pipe are respectively fixedly connected to the adjacent second straight pipes, and the middle part of the series pipe is fixedly connected to the main beam pipe.

2. A vehicle frame according to claim 1, characterized in that: The end of the third straight tube away from the second straight tube is continuously bent upward to form a fourth straight tube and a fifth straight tube in sequence, and the fourth straight tube is arranged to be inclined upward.

3. A frame according to claim 2, characterized in that: A connecting plate is fixedly connected to the lower side wall of the connection between the third straight tube and the fourth straight tube, and the first reinforcing tube, the second reinforcing tube and the third reinforcing tube are fixedly connected between the two connecting plates respectively.

4. A vehicle frame according to claim 2, characterized in that: A fourth reinforcing tube is fixedly connected between ends of the two fourth straight tubes away from the third straight tube.

5. A vehicle frame according to claim 2, characterized in that: The side tube assembly also includes an upper side tube, which is arranged above the lower side tube and along the length direction of the electric vehicle. One end of the upper side tube is fixedly connected to the second straight tube, and the other end of the upper side tube is fixedly connected to the fourth straight tube.

6. A vehicle frame according to claim 5, characterized in that: The cross section of the upper side tube is square, and a plurality of mounting holes are distributed on the top wall of the upper side tube along the length direction.

7. A vehicle frame according to claim 5, characterized in that: A plurality of ribs are fixedly connected between the upper side tube and the lower side tube.

8. A vehicle frame according to claim 2, characterized in that: A lifting lug is installed on the side of the fifth straight tube facing away from the main beam tube.

9. A vehicle frame according to claim 8, characterized in that: A fifth reinforcement tube is fixedly connected between the two lifting ears.

10. A vehicle frame according to claim 1, characterized in that: A head pipe is arranged above the main beam pipe, the head pipe is arranged obliquely, and the top end of the main beam pipe is fixedly connected to the side wall of the head pipe.

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