Assembly component for vehicle and vehicle

Abstract

The present invention provides an assembly component for a vehicle and a vehicle. The assembly component includes a first assembly component, a second assembly component and a third assembly component. The second assembly component is detachably assembled to a first predetermined installation position on the first assembly component along a first direction and the first assembly component constrains the freedom of the second assembly component in the first direction. The third assembly component is detachably mounted to a second predetermined installation position and can constrain the freedom of movement of the second assembly component in a second direction opposite to the first direction. By constraining and limiting the second assembly component by the third assembly component, the welding operation between the various assembly components can be reduced or omitted, so that the assembly of the vehicle and the replacement of components are simplified, and the manufacturing cost and maintenance cost of the vehicle are reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicles, and in particular to an assembly component for a vehicle and a vehicle using the assembly component. Background Art

[0002] With the rapid development of science and technology, the accelerating pace of production and life, vehicles have become important means of transport and transportation for people's work and life. For example, small express delivery vehicles with compartments (tricycles or four-wheeled small vans), four-wheeled elderly mobility scooters, etc., have brought a lot of convenience to people because of their light body, ability to travel through streets and alleys, and simple and flexible driving operations.

[0003] However, due to the large number of components of a vehicle, the assembly process is relatively complex, and complex welding processes are usually required to connect the components, which makes the manufacturing cost of the vehicle high. In addition, since the various components that make up the main frame of the vehicle (for example, the body and chassis) are usually connected to each other by welding, once a component is damaged and needs maintenance, not only is the disassembly and installation process complicated, but the welded components usually need to be replaced as a whole, making the maintenance cost of the vehicle high.

[0004] In short, due to the high manufacturing and maintenance costs of vehicles, the purchase, use and subsequent maintenance of vehicles have brought a certain economic burden to people's work and life, and also affected the popularization and promotion of vehicles. Summary of the invention

[0005] The object of the present invention is to provide an assembly component for a vehicle and a vehicle using the assembly component, so as to simplify the assembly process of the vehicle and reduce the manufacturing cost of the vehicle.

[0006] In order to achieve the above-mentioned purpose, the present invention provides an assembly component for a vehicle, the assembly component comprising a first assembly component, a second assembly component and a third assembly component, the second assembly component being detachably assembled to a first predetermined installation position on the first assembly component along a first direction and constrained by the first assembly component so that the second assembly component has only one degree of freedom in a second direction opposite to the first direction, and the third assembly component being detachably mounted to a second predetermined installation position and capable of constraining the degree of freedom of the second assembly component.

[0007] According to an aspect of the present invention, in the first predetermined installation position, the second assembly member has a tendency to rebound along the second direction.

[0008] According to one aspect of the present invention, the third assembly part is connected to the first assembly part and abuts or snaps onto the second assembly part.

[0009] According to an aspect of the present invention, the second assembly part moves along the first direction to be engaged with the first assembly part, or the second assembly part rotates along the first direction by a predetermined angle to be engaged with the first assembly part.

[0010] According to one aspect of the present invention, one of the first assembly part and the second assembly part is provided with a first positioning member and a second positioning member separated from each other, and the other of the first assembly part and the second assembly part is provided with a first card slot and a second card slot for respectively cooperating with the first positioning member and the second positioning member, and in the first predetermined installation position, the first positioning member is engaged with the first card slot, and the second positioning member is engaged with the second card slot.

[0011] According to one aspect of the present invention, a connecting card plate is disposed on the other of the first assembly member and the second assembly member, and the first card slot and the second card slot are formed by providing notches at intervals on the same side of the connecting card plate.

[0012] According to one aspect of the present invention, the third assembly part is a bolt, the connecting plate is formed on the second assembly part, a through hole is formed on the connecting plate, and a threaded hole is formed on the first assembly part, and the bolt passes through the through hole and is combined with the bolt hole.

[0013] According to one aspect of the present invention, a protruding stop portion is formed at the edge of the slot of the first card slot. After the first positioning member is engaged with the first card slot, the second assembly part can be rotated around the first positioning member relative to the first assembly part along the first direction to the first predetermined installation position. At the first predetermined installation position, the stop portion cooperates with the first positioning member to prevent the second assembly part from further rotating in the first direction.

[0014] According to one aspect of the present invention, the first positioning member and / or the second positioning member is a convex column, and a limiting flange is provided at the top end of the convex column, and the width of the limiting flange is greater than the width of the first clamping slot and the second clamping slot.

[0015] According to one aspect of the present invention, at the first predetermined installation position, the first positioning member and the first clamping groove are in interference fit, and the second positioning member and the second clamping groove are in interference fit.

[0016] According to one aspect of the present invention, a slot disk is provided on one of the first assembly part and the second assembly part, and the slot disk is circular, with a plurality of slot portions arranged at intervals along the circumferential direction of the slot disk; a cam disk is provided on the other of the first assembly part and the second assembly part, and the cam disk is circular, with a plurality of engaging protrusions arranged at intervals along the circumferential direction of the engaging protrusion; when the slot disk is axially aligned with the engaging protrusion, the engaging protrusion can engage with the slot portion after a relative rotation of a predetermined angle along a first direction.

[0017] According to one aspect of the present invention, one of the first assembly part and the second assembly part has a plug-in protrusion extending along the first direction, and the other is formed with a retaining ring extending along the first direction, the plug-in protrusion can be inserted into the retaining ring, and the third assembly part abuts against the other side of the second assembly part opposite to the plug-in protrusion.

[0018] According to one aspect of the present invention, the third assembly part locks the second assembly part on the first assembly part in a direction perpendicular to an assembly direction of the second assembly part.

[0019] According to one aspect of the present invention, the first assembly part is a longitudinal beam, the second assembly part is a main beam frame for forming a vehicle body structure, the main beam frame is a rectangular ring, an opening is formed on one side of the rectangular ring, two ends of the main beam frame forming the opening are respectively connected to opposite sides of the longitudinal beam along the first direction, and the third assembly part limits the main beam frame in the second direction.

[0020] According to one aspect of the present invention, the main beam frame is a first main beam frame for forming the vehicle body structure, the third assembly part is a front compartment for forming the vehicle body structure, and the front compartment abuts against the front side of the first main beam frame.

[0021] According to one aspect of the present invention, the main beam frame is a second main beam frame for forming the vehicle body structure, and the third assembly is a cargo hold base for forming the vehicle body structure, and the cargo hold base abuts against the rear side of the second main beam frame.

[0022] According to one aspect of the present invention, the first assembly part is a longitudinal beam, the second assembly part is a first main beam frame for forming a vehicle body structure, and the third assembly part is a roof panel or a connecting beam for forming a vehicle body structure, a front end of the roof panel or the connecting beam is connected to the first main beam frame, and a rear end of the roof panel or the connecting beam has a structure that can be connected to a second main beam frame for forming the vehicle body structure.

[0023] According to one aspect of the present invention, the third assembly member is a pin or a wedge, and the pin or the wedge abuts against one side of the second assembly member in the second direction of the first assembly member.

[0024] According to another aspect of the present invention, a vehicle is provided, the vehicle comprising the above-mentioned assembly.

[0025] According to another aspect of the present invention, a vehicle is provided, wherein the body and / or chassis of the vehicle comprises at least a first assembly, a second assembly and a third assembly, the first assembly being mounted to a first predetermined mounting position on the second assembly, wherein at the first predetermined mounting position, the first assembly is constrained by the second assembly and has only one degree of freedom, and the third assembly constrains the one degree of freedom.

[0026] According to another aspect of the present invention, the vehicle further includes a fourth assembly, ..., an Nth assembly, wherein N is a natural number greater than or equal to 4, and the third assembly has only one degree of freedom after being installed on the second assembly, and after the fourth assembly is installed on the third assembly, the third assembly is limited and the fourth assembly has only one degree of freedom, and so on, the Nth assembly has only one degree of freedom after installation and is locked by a fastener or a mortise and tenon structure.

[0027] According to another aspect of the present invention, a vehicle is provided, comprising a longitudinal beam, a first main beam frame installed on the longitudinal beam, a front cabin installed on the front side of the first main beam frame, a second main beam frame installed on the longitudinal beam and located on the rear side of the first main beam frame, and a cargo hold base installed on the rear side of the second main beam frame, the first main beam frame being installed on the longitudinal beam, limited by the longitudinal beam in the rear direction and having the freedom to move forward, the front cabin abutting against the front side of the first main beam frame, limiting the freedom of the first main beam frame and preventing the first main beam frame from moving forward; the second main beam frame being installed on the longitudinal beam, limited by the longitudinal beam in the forward direction and having the freedom to move backward, the base abutting against the rear side of the second main beam frame, being able to prevent the second main beam frame from moving backward.

[0028] According to another aspect of the present invention, the lower end of the first main beam frame and the lower end of the second main beam frame are respectively clamped with the longitudinal beam, and the vehicle also includes a top plate and a rear cover plate, the front end of the top plate is connected to the upper end of the first main beam frame, the lower surface of the top plate is pressed against the upper end of the second main beam frame, and the two ends of the rear cover plate are respectively connected to the rear end of the top plate and the cargo hold base.

[0029] According to another aspect of the present invention, the upper and lower ends of the rear cover plate are respectively engaged with the top plate and the cargo hold base, applying a downward pulling force to the top plate and an upward pulling force to the cargo hold base. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 A schematic diagram showing an assembly component for a vehicle according to an embodiment of the present invention;

[0031] Figure 2A , Figure 2B and 2C Schematic diagrams showing the first main beam frame and the longitudinal beam of a vehicle in different installation states according to an embodiment of the first embodiment of the present invention respectively;

[0032] Figure 3A , 3B 3C and 3D respectively show partial enlarged views of the connection positions of the first main beam frame and the longitudinal beam according to the first embodiment of the present invention, corresponding to Figure 2A , Figure 2B and 2C Installation status shown;

[0033] Figure 4 A schematic diagram of the connection structure between the first main beam frame and the longitudinal beam according to the second embodiment of the present invention is shown;

[0034] Figure 5 A schematic diagram of a connection structure between a first main beam frame and a longitudinal beam according to a third embodiment of the present invention is shown;

[0035] Figure 6 A schematic diagram of the connection structure between the first main beam frame and the longitudinal beam according to the fourth embodiment of the present invention is shown;

[0036] Fig. 7A and 7B A schematic diagram of the connection structure between the first main beam frame and the longitudinal beam according to the fifth embodiment of the present invention is shown;

[0037] Fig. 8A , Figure 8B and 8C A schematic diagram of the connection structure between the first main beam frame, the second main beam frame and the longitudinal beam according to the sixth embodiment of the present invention is shown;

[0038] Fig. 9A and 9B A schematic diagram of the vehicle installation structure according to a seventh embodiment of the present invention is shown;

[0039] Fig.10 A schematic diagram of the vehicle installation structure according to an eighth embodiment of the present invention is shown;

[0040] Fig.11 A schematic diagram of the vehicle installation structure according to a ninth embodiment of the present invention is shown;

[0041] Fig. 12A A schematic diagram of the vehicle installation structure according to the tenth embodiment of the present invention is shown;

[0042] Fig. 12B A schematic diagram of the vehicle installation structure according to the tenth embodiment of the present invention is shown.

[0043] Figure Number:

[0044] 10-first assembly; 20-second assembly; 30-third assembly; 100-longitudinal beam;

[0045] 101-first positioning member; 102-second positioning member; 103-threaded hole;

[0046] 130- clamping convex disc; 131- clamping protrusion; 150- clamping ring; 200- first main beam frame;

[0047] 210-connecting card board; 211-first card slot; 212-second card slot; 213-through hole;

[0048] 214-stopper; 230-slot plate; 231-slot portion; 232-notch; 250-plug-in protrusion;

[0049] 300-fastener; 400-second main beam frame; 500-front cabin; 600-cargo cabin base;

[0050] 700-connecting rod; 800-top plate; 900-rear cover plate. DETAILED DESCRIPTION

[0051] In order to solve the problems of complex vehicle assembly process, high manufacturing cost, non-disassembly, high maintenance cost in the prior art, the present invention provides an assembly component for a vehicle and a vehicle using the assembly component. Through various connection methods such as plug-in, screw connection, and snap-fit ​​between the various assembly parts, the degree of freedom of one assembly part is constrained by another assembly part, replacing the non-detachable connection method of welding between adjacent parts, so that the difficulty of vehicle installation is reduced, the manufacturing process is simplified, the manufacturing cost is reduced, and the difficulty and cost of maintenance and replacement are reduced. The concept of degree of freedom involved in the present invention refers to the degree of freedom of movement (forward and reverse movement) along the three rectangular coordinate axes of x, y, and z and the degree of freedom of rotation (clockwise and counterclockwise rotation) around these three coordinate axes, a total of 12 degrees of freedom.

[0052] Figure 1 FIG. 2 shows a schematic diagram of the installation of an assembly component for a vehicle according to an embodiment of the present invention. Figure 1As shown, an assembly component for a vehicle according to an embodiment of the present invention includes a first assembly part 10, a second assembly part 20 and a third assembly part 30. The second assembly part 20 is detachably assembled to a first predetermined installation position on the first assembly part 10 along a first direction and is constrained by the first assembly part 10 so that the second assembly part 20 has only one degree of freedom in a second direction opposite to the first direction. The third assembly part 30 is detachably mounted to a second predetermined installation position and can constrain the degree of freedom of the second assembly part 20.

[0053] The second assembly part 20 can be installed in a first predetermined position on the first assembly part 10 in a detachable manner such as plug-in, snap-on, or rotational fastening. For the convenience of description, the movement (movement, rotation) direction of the second assembly part 20 when installed relative to the first assembly part 10 is defined as the first direction, and the movement (movement, rotation) direction of the second assembly part 20 when removed from the first assembly part 10 is defined as the second direction, and the second direction is opposite to the first direction. When the second assembly part 20 moves along the second direction relative to the first assembly part 10, the second assembly part 20 can be removed from the first assembly part 10 in the reverse direction. In order to fix the second assembly part 20 on the first assembly part 10, at the first predetermined position, the third assembly part installed at the second predetermined position is used to constrain the freedom of the second assembly part 20 relative to the first assembly part 10, so that the second assembly part 20 can be limited in the first predetermined installation position without the need for additional fixing components or welding methods, thereby reducing the additional process steps required to fix the second assembly part 20 and reducing the installation cost.

[0054] The second assembly part 20 is engaged with the first assembly part 10 after moving along the first direction, or the second assembly part 20 is engaged with the first assembly part 10 after rotating along the first direction by a predetermined angle, so as to be installed in the first predetermined installation position. The third assembly part 30 can be detachably connected to the first assembly part 10 and abut or be engaged with the second assembly part 20, or be engaged with the first assembly part 10 and the second assembly part 20 at the same time, so that the second assembly part 20 cannot be removed from the first assembly part 10. In the first predetermined installation position, the second assembly part 20 can only have the freedom to move along the second direction relative to the first assembly part 10, so that after the third assembly part 30 is installed in place, the freedom of the second assembly part 20 can be effectively constrained to achieve the fixed installation of the second assembly part 20.

[0055] Similarly, when the third assembly part 30 is detachably installed at the second predetermined installation position, the fourth assembly part can also be used to abut or clamp the third assembly part to constrain the degree of freedom of the third assembly part 30. By analogy, other assembly parts can be installed in sequence by plugging and clamping, so that each of the multiple parts sequentially constrains the degree of freedom of the previous part, and finally only the last part needs to be fixed to achieve the installation of the body and / or chassis assembly of the entire vehicle, thereby simplifying the assembly process and installation structure of the vehicle to the greatest extent and reducing the manufacturing cost of the entire vehicle.

[0056] Therefore, according to one aspect of the present invention, a vehicle is provided, wherein the body and / or chassis of the vehicle comprises at least a first assembly 10, a second assembly 20 and a third assembly 30, the first assembly 10 being mounted to a first predetermined mounting position on the second assembly 20, at which the first assembly 10 is constrained by the second assembly 20 and has only one degree of freedom, and the third assembly 30 is connected to at least one of the first assembly 10 and the second assembly 20 to constrain the only one degree of freedom of the second assembly 20.

[0057] The vehicle also includes a fourth assembly, ..., an Nth assembly, wherein N is a natural number greater than or equal to 4. After the third assembly 30 is installed on the second assembly 20, it has only one degree of freedom. After the fourth assembly is installed on the third assembly 30, the third assembly 30 is constrained and limited and the fourth assembly has only one degree of freedom. Similarly, after the Nth assembly is installed, it has only one degree of freedom and is finally locked by a fastener, or the Nth assembly can also achieve its own fixed installation by a bayonet and mortise and tenon connection method.

[0058] Figure 2A , 2B 2C show examples of connection structures between assembly components for vehicles according to the first embodiment of the present invention. In the first embodiment of the present invention, the first assembly component 10, the second assembly component 20, and the third assembly component 30 are respectively the longitudinal beam 100, the first main beam frame 200, and the fastener 300 of the vehicle as examples, and the connection mode of the assembly components for vehicles according to the present invention is described in detail.

[0059] Figure 2A , 2B 2C respectively show three installation states of the first main beam frame 200 relative to the longitudinal beam 100. Figure 3A , 3B , 3C respectively show the Figure 2A , 2B 2A and 2B are partial enlarged views of the connection position between the first main beam frame 200 and the longitudinal beam 100 in the three installation states shown in FIG. 2C.

[0060] According to one aspect of the present invention, the first main beam frame 200 can be mounted on the longitudinal beam 100 along the first direction, preliminarily positioned for installation, and then fastened by the fastener 300 , thereby eliminating the need to weld the first main beam frame 200 to the longitudinal beam 100 .

[0061] In order to achieve the preliminary positioning and installation between the longitudinal beam 100 and the first main beam frame 200, at least two mutually spaced positioning members, for example, bosses, are provided on one of the longitudinal beam 100 and the first main beam frame 200, and a corresponding number of slots for cooperating with the positioning members are provided on the other. By connecting the slots and the positioning members one by one with each other, the first main beam frame 200 can be positioned and installed on the first predetermined installation position of the longitudinal beam 100, and multiple (11) degrees of freedom of the first main beam frame 200 are constrained, but it still has the freedom to be disassembled in the opposite direction.

[0062] exist Figure 3A , 3B In the example shown in 3C, the positioning member is formed on the longitudinal beam 100, including a first positioning member 101 and a second positioning member 102, which are separated from each other by a predetermined distance. Correspondingly, a slot is formed on the first main beam frame 200, including a first slot 211 and a second slot 212. The number of positioning members and slots can be more than two, and they can be engaged with each other in a one-to-one correspondence. In order to facilitate the formation of the slot, a connecting card plate 210 is provided at the end of the first main beam frame 200, and the first slot 211 and the second slot 212 are formed on the connecting card plate 210 at intervals.

[0063] The first positioning member 101 and the second positioning member 102 can be spaced apart in the longitudinal direction of the longitudinal beam 100, and the first clamping groove 211 and the second clamping groove 212 can be located on the same side of the connecting clamping plate 210, and the openings are oriented in the same direction. When the first positioning member 101 and the second positioning member 102 are aligned with the first clamping groove 211 and the second clamping groove 212 respectively and engaged with each other, the first main beam frame 200 can be preliminarily positioned on the longitudinal beam 100.

[0064] Normally, in order to make the installation structure of the first main beam frame 200 stable and to provide stable support for the roof, doors and other structures of the vehicle, the first main beam frame 200 is usually arranged to be installed perpendicular to the longitudinal beam 100, so that the gravity of the first main beam frame 200 and the various components installed on the first main beam frame 200 can act on the longitudinal beam in the vertical direction, thereby preventing the first main beam frame 200 from being bent due to the torque in the front and rear directions under the action of gravity, resulting in unstable support structure and damaged support strength.

[0065] In the process of installing the first main beam frame 200 to the longitudinal beam 100, the Figure 2A and 2BAs shown, when the first main beam frame 200 is in an inclined state, the first slot 211 is engaged with the first positioning member 101, and then the first main beam frame 200 is rotated upward and backward with the first positioning member 101 as the rotation axis (equivalent to assembling in a clockwise manner with the x-axis as the rotation axis). When the first main beam frame 200 is rotated to a vertical position, the second slot 212 is engaged with the second positioning member 102, so that the first main beam frame 200 is preliminarily installed on the longitudinal beam 100. At this time, the 11 degrees of freedom of the first main beam frame 200 are constrained, and it only has the degree of freedom to rotate counterclockwise with the x-axis as the rotation axis.

[0066] In order to further constrain the first main beam frame 200 to rotate counterclockwise with the x-axis as the rotation axis, in the example of the first embodiment of the present invention, the third assembly part 30 uses a fastener 300 to fasten the first main beam frame 200 to the longitudinal beam 100, which is equivalent to the fastener 300 locking the first main beam frame 200 on the longitudinal beam 100 perpendicular to the rotation direction of the first main beam frame 200. Since this locking direction is perpendicular to the assembly direction, that is, the linear motion of the fastener 300 along the x-axis and the rotational motion of the first main beam frame 200 along the x-axis are mutually constrained at a perpendicular angle, the fastener 300 is not easy to detach from the longitudinal beam 100 and the first main beam frame 200, so that the connection between the first main beam frame 200 and the longitudinal beam 100 is more firm and stable. It should be noted that this connection form in which the locking direction is perpendicular to the assembly direction is reflected in each subsequent embodiment and will not be repeated. Specifically, a through hole 213 is opened on the connecting card plate 210, and a threaded hole (not shown) is opened on the longitudinal beam 100. When the first positioning member 101 and the second positioning member 102 are respectively aligned with the first slot 211 and the second slot 212 and engaged with each other, the through hole 213 and the threaded hole 103 are aligned. At this time, the fastener 300 passes through the through hole 213 and combines with the threaded hole 103, constraining the first main beam frame 200 to only have the freedom to rotate counterclockwise with the x-axis as the rotation axis, thereby vertically and fixedly installing the first main beam frame 200 on the longitudinal beam 100. Figure 2C and Figure 3C The final installation state of the first main beam frame 200 on the longitudinal beam 100 is shown.

[0067] In order to make the first main beam frame 200 more firmly connected to the longitudinal beam 100 in the length direction of the positioning member, that is, to more stably limit the movement freedom of the first main beam frame 200 in the x-axis direction, the first positioning member 101 and the second positioning member 102 are formed as protruding columns, and have limiting flanges at the top ends of the protruding columns, and the width of the limiting flanges is greater than the width of the first slot 211 and the second slot 212, so that when the slots and the positioning members are engaged, the connecting clamp 210 will not fall off laterally from the positioning members.

[0068] In addition, at the first predetermined installation position, the first positioning member 101 can be set to have an interference fit with the first slot 211, and the second positioning member 102 can be set to have an interference fit with the second slot 212, so as to prevent the first main beam frame 200 from tipping over before the third assembly member 30 is installed to limit the first main beam frame 200.

[0069] For small vehicles, such as express logistics vehicles, elderly scooters, etc., the longitudinal beam 100 can be set as one, and the first main beam frame 200 can be substantially rectangular, and open on one side of the rectangle to form two free ends, and the two free ends can be connected to the lateral sides of the longitudinal beam 100 respectively. Both free ends can be connected to the longitudinal beam 100 using the connection method described above. As an example, the two free ends can be connected to the longitudinal beam 100 using the same connection structure. When the first main beam frame 200 needs to be installed on the longitudinal beam 100, the two free ends can be installed synchronously. In the case where the first main beam frame 200 is formed as a rectangular frame, since the two free ends are clamped from the lateral sides of the longitudinal beam 100 at the same time, even if the top of the positioning member is not provided with a limiting flange, the first main beam frame 200 can be prevented from detaching from the lateral side of the longitudinal beam 100. In addition, positioning holes can be formed on the opposite sides of the longitudinal beam 100, and the two ends of the first main beam frame 200 are respectively inserted into the positioning holes and have an interference fit with the positioning holes.

[0070] Figure 4 The structure of the assembly component according to the second embodiment of the present invention is basically the same as that of the assembly component according to the first embodiment, except that the arrangement positions of the card slot and the positioning member are different.

[0071] exist Figure 4 In the example shown, taking the first assembly part 10 as the longitudinal beam 100 and the second assembly part 20 as the first main beam frame 200 as an example, the first positioning member 101 and the second positioning member 102 are generally arranged along the height direction of the longitudinal beam 100, and the openings of the first slot 211 and the second slot 212 are generally facing the horizontal direction. Therefore, by respectively engaging the first slot 211 and the second slot 212 with the first positioning member 101 and the second positioning member 102, it is also possible to achieve constraints on the first main beam frame 200 in 11 degrees of freedom, so that the first main beam frame 200 only has the freedom to move in the opposite direction along the horizontal direction.

[0072] Therefore, the arrangement positions of the first positioning member 101 and the second positioning member 102 and the first slot 211 and the second slot 212 are not limited by the above examples, as long as the first main beam frame 200 can be initially positioned at the first predetermined position in a mutually engaged state.

[0073] Figure 5 An example of the connection structure between the first assembly and the second assembly according to the third embodiment of the present invention is shown. The structure between the first main beam frame 200 and the longitudinal beam 100 according to the third embodiment of the present invention is basically the same as the structure between the first main beam frame 200 and the longitudinal beam 100 according to the first embodiment, except that a protruding stopper 214 is formed at the opening edge of the first slot 211. After the first positioning member 101 is engaged with the first slot 211, the first main beam frame 200 can rotate upward relative to the longitudinal beam 100 around the first positioning member 101 to the position where the second slot 212 is engaged with the second positioning member 102, thereby being positioned at the first predetermined installation position. At the first predetermined installation position, the first main beam frame 200 can be prevented from continuing to flip backwards by cooperating with the first positioning member 101, thereby stably maintaining the first predetermined installation position, further ensuring that the first main beam frame 200 only has the freedom to flip forward and disassemble.

[0074] Figure 5 The stop 214 shown is also suitable for Figure 3A and Figure 4 The embodiment shown, for example, in Figure 3A and Figure 4 In the example shown, the stopper can be provided at the opening edge of the first card slot 211. In addition, without affecting the engagement operation between the card slot and the positioning member, the stopper 214 can be provided at the opening edges of the first card slot 211 and the second card slot 212, which will not be described in detail here.

[0075] In order to prevent the first main beam frame 200 from having a tendency to tip backward relative to the longitudinal beam 100, after the first main beam frame 200 is installed on the longitudinal beam 100 by means of a snap-fitting method, that is, at the first predetermined installation position, the first main beam frame 200 can also be set to have a tendency to rebound forward relative to the longitudinal beam 100. Specifically, the second positioning member 102 closer to the rear of the vehicle can be set slightly higher than the first positioning member 101 closer to the front of the vehicle, so that the first main beam frame 200 is not absolutely perpendicular to the ground at the first predetermined installation position. For example, the angle of the first main beam frame 200 relative to the front of the longitudinal beam 100 can be made slightly less than 90 degrees, so that the first main beam frame 200 has a slight tendency to rebound forward, and then is constrained and limited by the third assembly part 30. This will be discussed below in conjunction with Fig. 9A and 9B Describe in detail.

[0076] Figure 6 An example of a connection structure between a first assembly member and a second assembly member according to a fourth embodiment of the present invention is shown.

[0077] exist Figure 6In the example shown, the first assembly part 10 is still taken as the longitudinal beam 100, and the second assembly part 20 is taken as the first main beam frame 200. The first main beam frame 200 is installed on the longitudinal beam 100 by rotating and engaging. A slot disk may be provided on one of the first main beam frame 200 and the longitudinal beam 100, and a convex disk may be provided on the other. When the slot disk and the convex disk are axially aligned, the convex block on the convex disk can be engaged with the slot on the slot disk by rotating and dislocating the predetermined angle, so that the first main beam frame 200 is preliminarily installed at the first predetermined position.

[0078] exist Figure 6 In the example shown, the clamping groove plate 230 is arranged on the first main beam frame 200, and the clamping protrusion plate 130 is arranged on the longitudinal beam 100. However, this is only an example, and the arrangement positions of the two can be interchanged.

[0079] The slot disk 230 is circular, and has a plurality of slots 231 arranged at intervals along the circumferential direction. The opening of the slots 231 faces the tangential direction of the circumference of the slot disk 230, and a notch 232 is formed at the entrance of the slots 231. The cam disk 130 is a circular convex column, and a plurality of snap-in protrusions 131 are arranged at intervals on the outer circumference of the circular convex column. The snap-in protrusions 131 are close to the slot disk 230 and located at the notch of the slots 231 when aligned with the notch 232, and then enter the slots 231 after rotating a predetermined angle along the circumferential direction, and snap-in with the slots 231, thereby limiting the first main beam frame 200 in the rotation direction and the axial direction of the slot disk 230. Then, the first main beam frame 200 can be further constrained and limited by the third assembly part 30 to prevent the first main beam frame 200 from being disassembled after reverse rotation from the longitudinal beam 100. For example, holes may be provided on the slot plate 230, the convex plate 130 and the longitudinal beam 100, and the third assembly part 30 may be fixed in the holes of the above three, so that the first main beam frame 200 is locked on the longitudinal beam 100 in a direction perpendicular to the direction in which the first main beam frame 200 is rotated and assembled relative to the longitudinal beam 100. As an example, the third assembly part 30 may be a fastening bolt.

[0080] Fig. 7A and 7B An example of a connection structure between a first assembly member and a second assembly member according to a fifth embodiment of the present invention is shown.

[0081] like Fig. 7A and 7BAs shown, still taking the first assembly part 10 as the longitudinal beam 100 and the second assembly part 20 as the first main beam frame 200 as an example, a clamping ring 150 is provided on the side wall of the longitudinal beam 100, the opening of the clamping ring 150 faces the front side of the longitudinal beam 100, and a plug-in protrusion 250 is provided at the free end of the first main beam frame 200, and the plug-in protrusion 250 can be inserted into the clamping ring 150 from front to back along the length direction of the longitudinal beam 100, so as to preliminarily install the first main beam frame 200 on the longitudinal beam 100. Then, the first main beam frame 200 can be further constrained and limited from the front side of the first main beam frame 200 by the third assembly part 30, so that the first main beam frame 200 is stably installed on the longitudinal beam 100.

[0082] The connection method between the first main beam frame 200 and the longitudinal beam 100 described in the previous embodiment can also be applied to the connection between other first assemblies and second assemblies of vehicle components that need to be connected to each other, and is not limited to the connection between the first main beam frame 200 and the longitudinal beam 100. Therefore, when the connection between the second main beam frame 400 and the longitudinal beam 100 is mentioned below, the specific connection method between the second main beam frame 400 and the longitudinal beam 100 will not be described in detail.

[0083] Generally, a vehicle includes at least two main beam frames. In the present invention, taking a small vehicle such as a courier logistics vehicle as an example, the vehicle includes a first main beam frame 200 and a second main beam frame 400, and both main beam frames are fixedly mounted on the longitudinal beam 100 to form the A and B pillars of the vehicle respectively. The first main beam frame 200 is generally located in front of the cockpit, and the second main beam frame 400 is generally located between the cockpit and the cargo hold.

[0084] Fig. 8A and 8B Schematic diagrams showing different installation states of the first main beam frame 200 and the second main beam frame 400 on the longitudinal beam 100 are shown respectively. Figure 8CThe installation process of the first main beam frame 200 and the second main beam frame 400 on the longitudinal beam 100 is schematically shown. The connection structure between the first main beam frame 200 and the second main beam frame 400 and the longitudinal beam 100 can be in the same manner, but the assembly direction is opposite. For example, the first main beam frame 200 and the second main beam frame 400 can both be formed into a ring shape, and have an opening on one side to form two free ends, and the two free ends can have the same connection structure, respectively connected to the two sides of the longitudinal beam 100, and respectively installed in opposite directions at the front and rear ends of the longitudinal beam 100. In the process of installing the first main beam frame 200, the first main beam frame 200 can be set to be substantially horizontal or inclined at a certain angle, and then the first main beam frame 200 can be flipped from the front to the top and backward to a vertical position. Similarly, the second main beam frame 400 can be flipped from the back to the top and forward to a vertical position. By setting the mounting structure between the first main beam frame 200 and the second main beam frame 400 and the longitudinal beam 100 or setting the mounting angle relative to the longitudinal beam 100, the first main beam frame 200 can have a slight tendency to rebound forward and the second main beam frame 400 can have a slight tendency to rebound backward.

[0085] Although in the first embodiment of the present invention described above, after the first main beam frame 200 is snap-fitted and installed on the longitudinal beam 100, the first main beam frame 200 is finally limited by the fastener 300, the method of using the third assembly part to constrain and limit the installation structure between the first assembly part and the second assembly part is not limited to this.

[0086] In the second embodiment of the present invention, a fastener 300 is used as the third assembly part 30 to further constrain the connection structure between the first assembly part 10 and the second assembly part 20, and the second assembly part 20 is fixedly installed on the first assembly part 10. However, the example of the third assembly part 30 is not limited thereto, and other assembly parts adjacent to the second assembly part 20 can also be used to constrain the second assembly part 20.

[0087] Fig. 9A and Fig. 9B The sixth embodiment of the present invention shows an example of the structure of the assembly component. In the sixth embodiment, the front compartment 500 of the vehicle is used as the third assembly part 30 to replace the fastener 300 in the first embodiment to constrain the first main beam frame 200, further reducing the need for additional connection parts. The connection structure between the first main beam frame 200 and the longitudinal beam 100 can adopt the method of mutual engagement of the slots and positioning parts described in the previous embodiments, which will not be repeated here. Fig. 9A and Fig. 9B The sixth embodiment is described in detail.

[0088] The vehicle generally includes a front cabin 500, which is located in front of the cockpit, specifically, in front of the first main beam frame 200. By providing the front cabin 500, the front of the vehicle can be made more beautiful, the engine and components such as control electronic components can be installed, and the collision buffering capacity can be increased to protect the driver.

[0089] According to the assembly assembly of the sixth embodiment of the present invention, the front cabin 500 of the vehicle is used to limit the first main beam frame 200 from the front side of the first main beam frame 200, thereby limiting the freedom of movement of the first main beam frame 200, so that the first main beam frame 200 cannot be disassembled forward and reversely in the horizontal direction. In order to install the front cabin 500 at the second predetermined position, the lower part of the front cabin 500 can be connected to the longitudinal beam 100, and the side can be pressed against the front side of the first main beam frame 200. As an example, the lower part of the front cabin 500 can be connected to the longitudinal beam 100 first, and then the front cabin 500 can be turned backwards to abut against the front side of the first main beam frame 200. For example, the front cabin 500 can be hinged obliquely at the front end of the longitudinal beam, and then rotated backwards and abutted against the front side wall of the first main beam frame 200, and pressed against the first main beam frame 200. The center of gravity of the front cabin 500 may be located between the hinge point between the front cabin 500 and the longitudinal beam 100 and the first main beam frame 200, so as to prevent the front cabin 500 from flipping forward, and keep the front cabin 500 in a position to press the first main beam frame 200 under the action of gravity. In order to further improve the connection between the front cabin 500 and the first main beam frame 200, the front cabin 500 and the first main beam frame 200 may be provided with plug-in protrusions and slots, respectively, which are engaged with each other to enhance the connection stability between the two.

[0090] Similar, such as Fig. 9A and 9B As shown, in the example of using the longitudinal beam 100 and the second main beam frame 400 as the first assembly part 10 and the second assembly part 20, the cargo hold base 600 can be used as the third assembly part 30, and the second main beam frame 400 can be abutted and limited from the rear side of the second main beam frame 400 by the cargo hold base 600 when the second main beam frame 400 is initially installed on the longitudinal beam 100. For example, the cargo hold base 600 can be hinged obliquely at the rear end of the longitudinal beam 100, and then rotated forward to abut against the rear side wall of the second main beam frame 400, and pressed against the second main beam frame 400. The center of gravity of the cargo hold base 600 can be located between the hinge point of the cargo hold base 600 and the longitudinal beam 100 and the second main beam frame 400, so as to prevent the cargo hold base 600 from flipping backwards, so that the cargo hold base 600 is kept in a position to press the second main beam frame 400 under the action of gravity.

[0091] As previously combined Fig. 8A , 8BAs described in FIG8C , the first main beam frame 200 has a slight tendency to rebound forward, and the second main beam frame 400 has a slight tendency to rebound backward. In this case, by using the front cabin 500 to abut against the front side of the first main beam frame 200, the two are pressed against each other in the front-to-back direction, which can make the connection more stable. Similarly, the cargo hold base 600 abuts against the rear side of the second main beam frame 400, and the two are pressed against each other, which can improve the connection stability of the two.

[0092] Fig.10 An exemplary structure of an assembly component according to an eighth embodiment of the present invention is shown.

[0093] In this embodiment, when the first main beam frame 200 and the second main beam frame 400 are installed on the longitudinal beam 100, the first main beam frame 200 and the second main beam frame 400 can be connected by the connecting rod 700, and the installation limit of the first main beam frame 200 and the second main beam frame 400 is realized at the same time, so as to prevent the first main beam frame 200 and the second main beam frame 400 from being disassembled in reverse. Therefore, when the longitudinal beam 100 and the first main beam frame 200 correspond to the first assembly part 10 and the second assembly part 20 mentioned above, respectively, the connecting rod 700 corresponds to the third assembly part 30. Similarly, when the longitudinal beam 100 and the second main beam frame 400 correspond to the first assembly part 10 and the second assembly part 20 mentioned above, respectively, the connecting rod 700 corresponds to the third assembly part 30.

[0094] Fig.11 FIG. 8 is a schematic diagram showing the structure of a vehicle according to a ninth embodiment of the present invention. Fig.11 As shown, the limiting constraint structure connecting the first main beam frame 200 and the second main beam frame 400 through the connecting rod 700 can be used simultaneously with the structure using the front cabin 500 and the cargo compartment base 600 for limiting constraint, so as to further enhance the connection stability between the vehicle body assembly and the vehicle chassis assembly. In this embodiment, the first main beam frame 200 is double-constrained and limited by the connecting rod 700 and the front cabin 500, and the second main beam frame 400 is double-constrained and limited by the connecting rod 700 and the cargo compartment base 600, so that the first main beam frame 200 and the second main beam frame 400 can be constrained from both sides and in two directions to prevent them from moving to any side and loosening, thereby enhancing the overall fixing effect of mutual constraint and coordinated limiting between various components.

[0095] In the above-described embodiment, the front cabin 500 is used as the third assembly part 30 to fix the first main beam frame 200. However, in the case where the vehicle does not have a front cabin, it can also be constrained by a limiter, which can be a front pin or wedge set on the first main beam frame 200 to prevent the first main beam frame 200 from tipping forward. Similarly, in the case where the vehicle is not provided with a cargo hold base 600, a pin or wedge can also be set on the rear side of the second main beam frame 400 to prevent the second main beam frame 400 from tipping backward. The front pin or wedge can be fixedly installed on the longitudinal beam 100 and protrude from the longitudinal beam 100 to form a block for the forward movement of the first main beam frame 200 and to form a block for the backward movement of the second main beam frame 400. However, if the installation operation and the installation space allow, the pin or wedge can be used simultaneously with the front cabin 500 and the cargo hold base 600.

[0096] Typically, the vehicle also includes a cockpit roof and a cargo hold roof, which are used to close and shield the tops of the cockpit and the cargo hold. In order to improve the strength of the vehicle and reduce the number of components, the cockpit roof and the cargo hold roof are usually made of a single piece. Fig. 12A and 12B 1 is a simplified schematic diagram of a vehicle according to a tenth embodiment of the present invention, showing a simplified schematic diagram of a vehicle having an integral roof panel 800 which integrally extends from front to rear and covers the top of a cockpit and a cargo compartment at the same time.

[0097] like Fig. 12A and 12B As shown, the first main beam frame 200 and the second main beam frame 400 are respectively installed on the longitudinal beam 100, and the front side of the first main beam frame 200 is constrained by the front cabin 500 to prevent the first main beam frame 200 from tipping forward. The cargo hold base 600 is installed on the rear side of the second main beam frame 400 to prevent the second main beam frame 400 from tipping backward.

[0098] The front end of the top plate 800 can be connected to the upper end of the first main beam frame 200, and a groove that engages with the upper end of the second main beam frame 400 can be provided on the lower surface of the top plate 800, and engaged with the upper end of the second main beam frame 400, so that after the top plate 800 is installed to the predetermined position, it can not only constrain the first main beam frame 200, but also constrain and limit the second main beam frame 400.

[0099] The front end of the top plate 800 can be snap-connected with the upper end of the first main beam frame 200. For example, the front end of the top 800 is bent downward and backward to form a hook portion with an opening facing backward, and the hook portion can be hung on the upper part of the first main beam frame 200.

[0100] The vehicle according to this embodiment further includes a rear cover plate 900, which is connected to the rear side of the cargo compartment to close the interior space of the cargo compartment. The upper end of the rear cover plate 900 can be fixedly connected to the rear end of the top plate 800, and the lower end of the rear cover plate 900 is fixedly connected to the cargo compartment base 600, so that the top plate 800 is fixed by the rear cover plate 900.

[0101] The rear cover plate 900 can be detachably fixedly connected to the top plate 800 and the cargo hold base 600 by means of fasteners. Fig. 12B As shown, the rear cover plate 900 can also be fixedly connected to the top plate 800 and the cargo hold base 600 respectively by means of snap-fitting. For example, a dovetail groove is provided on the rear end of the top plate 800 and the rear surface of the cargo hold base 600, and the rear cover plate 900 is provided with a protrusion of a corresponding shape, which is combined with each other by means of mortise and tenon, and the installation of the rear cover plate 900 can also be realized without welding the rear cover plate, which is convenient for subsequent maintenance and replacement of damaged parts. When the rear cover plate 900 is installed by snap-fitting, the upper end of the rear cover plate 900 applies a downward pulling force to the rear end of the top plate 800 and an upward pulling force to the cargo hold base 600, so that the various components are pressed and locked to each other to prevent loosening and falling off, thereby improving the connection stability. Similarly, the two side wall panels of the cargo hold can be connected to the cargo hold base 600 and the side wall of the top plate 800 in the same way, which will not be repeated here.

[0102] According to the tenth embodiment of the present invention, the first main beam frame 200 and the second main beam frame 400 can be preliminarily installed and positioned on the longitudinal beam 100 by means of a snap fit, the first main beam frame 200 is constrained and limited by the front cabin 500, and the second main beam frame 400 is constrained and limited by the cargo hold base. On this basis, the first main beam frame 200 and the second main beam frame 400 are double constrained by the top plate 800, so that the installation structure of the first main beam frame 200 and the second main beam frame 400 on the longitudinal beam 100 is more stable and firm. Finally, the rear cover plate 900 is connected to the top plate 800 and the cargo hold base 600, for example, by fasteners or mortise and tenon method.

[0103] In summary, for the installation of various assemblies forming the vehicle body and chassis, the welding connection structure can be reduced or omitted through the detachable connection methods such as the snap connection, abutment and mortise and tenon joints between the components. For example, the final position limit of each assembly component of the vehicle body and / or chassis can be achieved by only tightening the last assembly part, which greatly simplifies the assembly process of the vehicle and makes the assembly process easier. Once a component of the vehicle is damaged, the damaged component can be quickly replaced, the maintenance cycle is short, and the maintenance cost is low.

[0104] For example, a small express logistics vehicle is an indispensable means of transportation and a tool for loading express items for couriers to quickly and effectively deliver express items. Once the express logistics vehicle is damaged, the courier may not be able to send, receive or deliver any express items. However, the vehicle according to the present invention can greatly reduce the impact on the courier's work due to its short maintenance cycle.

[0105] Therefore, the assembly component according to the present invention and the vehicle using the assembly component can reduce the manufacturing cost of the vehicle, reduce the difficulty of repairing and replacing the vehicle during use, and alleviate the economic burden of the user, which is conducive to promoting the popularization and promotion of the vehicle.

[0106] Although the embodiments of the present invention have been described in detail in conjunction with the accompanying drawings, the solutions of the present invention are not limited thereto. Without any contradiction or conflict, the structures or connection methods between the various embodiments can be combined or superimposed on each other to form new embodiments. These variations are all within the scope of protection of the present invention.

Claims

1. An assembly component for a vehicle, It is characterized in that The assembly component comprises a first assembly part (10), a second assembly part (20) and a third assembly part (30); the second assembly part (20) is detachably assembled to a first predetermined installation position on the first assembly part (10) along a first direction and is constrained by the first assembly part (10) so that the second assembly part (20) has only one degree of freedom in a second direction opposite to the first direction; the third assembly part (30) is detachably mounted to a second predetermined installation position and is capable of constraining the degree of freedom of the second assembly part (20); wherein the first assembly part (10) is a longitudinal beam (100), the second assembly part (20) is a first main beam frame (200) for forming a vehicle body structure, the third assembly part (30) is a front cabin (500) for forming a vehicle body structure, the first main beam frame (200) is limited in a rearward direction by the longitudinal beam (100) and has the freedom to move forward, the front cabin (500) abuts against the front side of the first main beam frame (200), limits the freedom of the first main beam frame (200), and prevents the first main beam frame (200) from moving forward, or The first assembly part (10) is a longitudinal beam (100), the second assembly part (20) is a second main beam frame (400) for forming a vehicle body structure, is limited in the forward direction by the longitudinal beam (100) and has the freedom to move backward, the third assembly part (30) is a cargo hold base (600) for forming a vehicle body structure, the cargo hold base (600) abuts against the rear side of the second main beam frame (400) to prevent the second main beam frame (400) from moving backward, or The first assembly part (10) is a longitudinal beam (100), the second assembly part (20) is a first main beam frame (200) for forming a vehicle body structure, the third assembly part (30) is a top plate (800) or a connecting rod (700) for forming a vehicle body structure, and the assembly component also includes a second main beam frame (400) for forming a vehicle body structure, and the rear end of the top plate (800) or the connecting rod (700) has a structure that can be connected to the second main beam frame (400), thereby limiting the degree of freedom of the first main beam frame (200) and the second main beam frame (400).

2. The assembly assembly for a vehicle according to claim 1, It is characterized in that In the first predetermined installation position, the second assembly part (20) has a tendency to rebound along the second direction.

3. The assembly according to claim 1, It is characterized in that The second assembly part (20) moves along the first direction to engage with the first assembly part (10), or the second assembly part (20) rotates a predetermined angle along the first direction to engage with the first assembly part (10).

4. The assembly according to claim 3, It is characterized in that The third assembly part (30) is connected to the first assembly part (10) and abuts or snaps onto the second assembly part (20).

5. The assembly according to claim 3, It is characterized in that One of the first assembly part (10) and the second assembly part (20) is provided with a first positioning part (101) and a second positioning part (102) which are separated from each other, and the other of the first assembly part (10) and the second assembly part (20) is provided with a first card slot (211) and a second card slot (212) for respectively cooperating with the first positioning part (101) and the second positioning part (102); in the first predetermined installation position, the first positioning part (101) is engaged with the first card slot (211), and the second positioning part (102) is engaged with the second card slot (212).

6. The assembly according to claim 5, It is characterized in that The other of the first assembly part (10) and the second assembly part (20) is provided with a connecting card plate (210), and the first card slot (211) and the second card slot (212) are formed by providing notches at intervals on the same side of the connecting card plate (210).

7. The assembly according to claim 6, It is characterized in that The connecting card plate (210) is formed on the second assembly part (20), a through hole (213) is formed on the connecting card plate (210), and a threaded hole is formed on the first assembly part (10), and the bolt (300) can pass through the through hole and then be combined with the threaded hole.

8. The assembly according to claim 6, It is characterized in that A protruding stopper (214) is formed at the edge of the notch of the first locking slot (211); after the first positioning member (101) is engaged with the first locking slot (211), the second assembly member (20) can be rotated around the first positioning member (101) relative to the first assembly member (10) along the first direction to the first predetermined installation position; at the first predetermined installation position, the stopper (214) cooperates with the first positioning member (101) to prevent the second assembly member (20) from further rotating in the first direction.

9. The assembly according to claim 5, It is characterized in that The first positioning member (101) and / or the second positioning member (102) are convex columns, and a limiting flange is provided at the top end of the convex column, and the width of the limiting flange is greater than the width of the first clamping slot (211) and the second clamping slot (212).

10. The assembly according to claim 5, It is characterized in that At the first predetermined installation position, the first positioning member (101) is interference-fitted with the first clamping slot (211), and the second positioning member (102) is interference-fitted with the second clamping slot (212).

11. The assembly according to claim 4, It is characterized in that The longitudinal beam (100) is a single beam. A slot disk (230) is provided on one of the first assembly part (10) and the second assembly part (20). The slot disk (230) is circular and has a plurality of slot portions (231) arranged at intervals along the circumferential direction of the slot disk (230). A cam disk (130) is provided on the other of the first assembly part (10) and the second assembly part (20). The cam disk (130) is circular and has a plurality of engaging protrusions (131) arranged at intervals along the circumferential direction of the engaging protrusion (130). When the slot disk (230) is axially aligned with the engaging protrusion (130), the engaging protrusions (131) can engage with the slot portions (231) after being relatively rotated by a predetermined angle in a first direction.

12. The assembly according to claim 4, It is characterized in that One of the first assembly part (10) and the second assembly part (20) has a plug-in protrusion (250) extending along the first direction, and the other is formed with a snap ring (150) extending along the first direction, the plug-in protrusion (250) can be plugged into the snap ring (150), and the third assembly part (30) abuts against the other side of the second assembly part (20) opposite to the plug-in protrusion (250).

13. The assembly according to any one of claims 1 to 12, It is characterized in that In a direction perpendicular to the assembly direction of the second assembly part (20), the third assembly part (30) locks the second assembly part (20) on the first assembly part (10).

14. The assembly according to claim 4, It is characterized in that The longitudinal beam (100) is a single beam, the first main beam frame (200) is a rectangular ring, an opening is formed on one side of the rectangular ring, two ends of the first main beam frame (200) forming the opening are respectively connected to opposite sides of the longitudinal beam (100) along the first direction, and the third assembly part (30) limits the first main beam frame (200) in the second direction.

15. The assembly according to claim 4, It is characterized in that The longitudinal beam (100) is a single beam, the second main beam frame (400) is a rectangular ring, an opening is formed on one side of the rectangular ring, two ends of the second main beam frame (400) forming the opening are respectively connected to opposite sides of the longitudinal beam (100) along the first direction, and the third assembly part (30) limits the second main beam frame (400) in the second direction.

16. The assembly according to claim 4, It is characterized in that The third assembly part (30) is a pin or a wedge, and the pin or the wedge abuts against one side of the second assembly part (20) in the second direction relative to the first assembly part (10).

17. A vehicle, It is characterized in that The vehicle comprises a mounting assembly as claimed in any one of claims 1-16.

18. The vehicle according to claim 17, It is characterized in that The vehicle further comprises a fourth assembly part, ..., an Nth assembly part, wherein N is a natural number greater than or equal to 4, and the third assembly part (30) has only one degree of freedom after being mounted on the first assembly part (10) or the second assembly part (20); after the fourth assembly part is mounted on the third assembly part (30), the third assembly part (30) is limited in position and the fourth assembly part has only one degree of freedom, and so on; after the Nth assembly part is mounted, it has only one degree of freedom and is locked by a fastener or a mortise and tenon structure.

19. A vehicle, comprising a longitudinal beam (100), a first main beam frame (200) mounted on the longitudinal beam (100), a front cabin (500) mounted on the front side of the first main beam frame (200), a second main beam frame (400) mounted on the longitudinal beam (100) and located on the rear side of the first main beam frame (200), and a cargo hold base (600) mounted on the rear side of the second main beam frame (400), It is characterized in that The first main beam frame (200) is mounted on the longitudinal beam (100), is limited by the longitudinal beam (100) in a rearward direction and has the freedom to move forward, and the front cabin (500) abuts against the front side of the first main beam frame (200), limits the freedom of the first main beam frame (200), and prevents the first main beam frame (200) from moving forward; The second main beam frame (400) is mounted on the longitudinal beam (100), is limited by the longitudinal beam (100) in the forward direction and has the freedom to move backward, and the cargo hold base (600) abuts against the rear side of the second main beam frame (400), thereby preventing the second main beam frame (400) from moving backward.

20. The vehicle according to claim 19, It is characterized in that The lower end of the first main beam frame (200) and the lower end of the second main beam frame (400) are respectively connected to the longitudinal beam (100), and the vehicle also includes a top plate (800) and a rear cover plate (900), the front end of the top plate (800) is connected to the upper end of the first main beam frame (200), the lower surface of the top plate (800) is pressed against the upper end of the second main beam frame (400), and the two ends of the rear cover plate (900) are respectively connected to the rear end of the top plate (800) and the cargo hold base (600).

21. The vehicle according to claim 20, It is characterized in that The upper and lower ends of the rear cover plate (900) are respectively engaged with the top plate (800) and the cargo hold base (600), applying a downward pulling force to the top plate (800) and an upward pulling force to the cargo hold base (600).

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