A modular retractable chassis configuration for electric vehicles

Abstract

This invention discloses a modular retractable chassis configuration for an electric vehicle, comprising: a connecting body, which includes a connecting body crossbeam and two connecting body longitudinal side beams; the two connecting body longitudinal side beams are symmetrically arranged, and the two ends of the connecting body crossbeam are fixedly connected to the two connecting body longitudinal side beams respectively, and the connecting body crossbeam is perpendicular to the connecting body longitudinal side beams; a first telescopic body, which is disposed at one end of the connecting body, including: a first telescopic body crossbeam, multiple first telescopic body longitudinal beams, a first telescopic body transverse side beam, and two first telescopic body longitudinal side beams; a second telescopic body, which is disposed at the other end of the connecting body, including: a second telescopic body crossbeam, multiple second telescopic body longitudinal beams, a second telescopic body transverse side beam, and two second telescopic body longitudinal side beams; the first telescopic body longitudinal side beams are slidable along the axial direction of the connecting body longitudinal side beams; the second telescopic body longitudinal side beams are slidable along the axial direction of the connecting body longitudinal side beams; and a limiting locking mechanism, which is used to limit the position of the first telescopic body and the second telescopic body relative to the connecting body.

Description

Technical Field

[0001] This invention belongs to the field of electric vehicle chassis technology, and specifically relates to a modular and retractable chassis configuration for electric vehicles. Background Technology

[0002] In traditional vehicles, the chassis supports and mounts the engine and its various components and assemblies, forming the overall shape of the car. It receives power from the engine, enabling the car to move and drive normally according to the driver's control. Traditionally, it affects the comfort, safety, and handling of the entire vehicle. However, for new energy vehicles, including electric vehicles, its impact is even more profound.

[0003] Based on the above, the chassis structure of electric vehicles needs to be adapted to the onboard power battery, suitable for highly integrated system modules to promote modular vehicle design, while not restricting the design of the vehicle's interior space and exterior styling. Currently, chassis are mainly of a uniform configuration, unable to be sized to accommodate different driving ranges and wheelbases. Summary of the Invention

[0004] The purpose of this invention is to provide a modular and retractable chassis configuration for electric vehicles, which can change the axial length of the chassis to adapt to models with different wheelbases.

[0005] Another objective of this invention is to enable the installation of power batteries with different driving ranges by modifying the axial length of the chassis.

[0006] The technical solution provided by this invention is as follows:

[0007] A modular, retractable chassis configuration for electric vehicles includes:

[0008] The connector includes a crossbeam and two longitudinal side beams.

[0009] The two connecting body longitudinal side beams are symmetrically arranged, and the two ends of the connecting body cross beam are respectively fixedly connected to the two connecting body longitudinal side beams, and the connecting body cross beam is perpendicular to the connecting body longitudinal side beams;

[0010] The first telescopic body, which is disposed at one end of the connecting body, includes: a first telescopic body crossbeam, a plurality of first telescopic body longitudinal beams, a first telescopic body transverse side beam and two first telescopic body longitudinal side beams;

[0011] The first telescopic body crossbeam and the first telescopic body side beam are arranged parallel to each other at intervals. One end of the first telescopic body longitudinal beam is fixedly connected to the first telescopic body crossbeam, and the other end is fixedly connected to the first telescopic body side beam.

[0012] The first telescopic body's transverse beam is perpendicular to the first telescopic body's longitudinal beam, and the two ends of the first telescopic body's transverse beam are respectively fixedly connected to the two first telescopic body's longitudinal beams;

[0013] The first telescopic body longitudinal beam is parallel to and corresponds to the connecting body longitudinal beam; the first telescopic body longitudinal beam is connected to the connecting body longitudinal beam and can slide along the axial direction of the connecting body longitudinal beam.

[0014] The second telescopic body, which is disposed at the other end of the connecting body, includes: a second telescopic body crossbeam, multiple second telescopic body longitudinal beams, a second telescopic body transverse side beam, and two second telescopic body longitudinal side beams;

[0015] The second telescopic body crossbeam and the second telescopic body side beam are arranged parallel to each other at intervals. One end of the second telescopic body longitudinal beam is fixedly connected to the second telescopic body crossbeam, and the other end is fixedly connected to the second telescopic body side beam.

[0016] The second telescopic body's transverse beam is perpendicular to the second telescopic body's longitudinal beam, and both ends of the second telescopic body's transverse beam are fixedly connected to the two second telescopic body's longitudinal beams, respectively.

[0017] The second telescopic body longitudinal beam is parallel to and corresponds to the connecting body longitudinal beam; the second telescopic body longitudinal beam is connected to the connecting body longitudinal beam and can slide along the axial direction of the connecting body longitudinal beam.

[0018] A limiting locking mechanism is used to limit the positions of the first telescopic body and the second telescopic body relative to the connecting body.

[0019] Preferably, it also includes a power battery compartment, which is detachably mounted on the main frame composed of the connecting body, the first telescopic body, and the second telescopic body.

[0020] Preferably, the power battery compartment includes:

[0021] The base plate is located at the bottom of the main frame;

[0022] Two H-shaped frames are fixedly installed on the base plate, and the two H-shaped frames are symmetrically arranged on both sides of the connecting beam;

[0023] The two ends of the sun-shaped frame are respectively close to the two longitudinal side beams of the connecting body.

[0024] Preferably, the longitudinal side beams of the first and second telescopic bodies are provided with guide sleeves along the axial direction inside, and guide rods are coaxially provided at both ends of the longitudinal side beams of the connecting body; the guide rods are matched and disposed in the guide sleeves.

[0025] Preferably, the limiting locking mechanism includes:

[0026] Two limit sliders;

[0027] The connecting beam has two guide grooves along the axial direction at its top, and the limiting sliders are respectively arranged in the guide grooves.

[0028] A locking slider is simultaneously matched and disposed in the two guide grooves;

[0029] The locking slider can move along the guide groove or be locked on the connecting beam;

[0030] Two first fixed posts are fixedly mounted on the limiting slider in a one-to-one correspondence;

[0031] Two second fixing posts are fixedly mounted on the locking slider and correspond one-to-one with the positions of the two first fixing posts;

[0032] Four third fixed columns are set one-to-one at the top of the connection between the first telescopic body horizontal beam and the two first telescopic body longitudinal beams, and at the top of the connection between the second telescopic body horizontal beam and the two second telescopic body longitudinal beams.

[0033] Two first limiting rods are symmetrically arranged on both sides of the connecting beam; each of the two ends of the first limiting rod has a through hole, and it is rotatably sleeved on the first fixed post and the third fixed post arranged on the same side as the first fixed post through the through holes at both ends.

[0034] Two second limiting rods are symmetrically arranged on both sides of the connecting beam; each of the two ends of the second limiting rod has a through hole, and is rotatably sleeved on the second fixing post and the third fixing post arranged on the same side as the second fixing post through the through holes at both ends.

[0035] Preferably, the modular retractable chassis configuration for electric vehicles further includes:

[0036] A front collapsible beam is fixedly connected to the first telescopic body crossbeam; the front collapsible beam includes a front collapsible beam crossbeam and multiple front collapsible beam longitudinal beams.

[0037] Wherein, one end of the longitudinal beam of the front collapsible beam is fixedly connected to the transverse beam of the front collapsible beam, and the other end is fixedly connected to the transverse beam of the first telescopic body; the longitudinal beam of the front collapsible beam is perpendicular to the transverse beam of the first telescopic body, and the plurality of longitudinal beams of the front collapsible beam are spaced apart along the axial direction of the transverse beam of the first telescopic body; and

[0038] The rear collapsible beam is fixedly connected to the second telescopic body crossbeam; the rear collapsible beam includes a rear collapsible beam crossbeam and multiple rear collapsible beam longitudinal beams.

[0039] Wherein, one end of the rear collapsible beam longitudinal beam is fixedly connected to the rear collapsible beam transverse beam, and the other end is fixedly connected to the second telescopic body transverse beam; the rear collapsible beam longitudinal beam is perpendicular to the second telescopic body transverse beam, and the plurality of rear collapsible beam longitudinal beams are spaced apart along the axial direction of the second telescopic body transverse beam.

[0040] Preferably, the front collapsible crossbeam comprises:

[0041] A connecting plate, which is arranged parallel to the first telescopic body beam;

[0042] The connecting plate is connected to the longitudinal beam of the front collapsible beam on one side, and a groove is provided on the other side of the connecting plate.

[0043] An arc-shaped beam, with its concave side facing the connecting plate, has its two ends respectively connected to the slide groove via sliders;

[0044] The bow-shaped beam is composed of multiple concave hexagons arranged and connected laterally.

[0045] Preferably, the power battery compartment is connected to the main frame by four locking mechanisms, which are respectively located at the four top corners of the power battery compartment.

[0046] The locking mechanism includes:

[0047] The lock body is fixedly installed on the power battery compartment, and the lock body has a receiving cavity with one end open;

[0048] A locking tongue, one end of which is disposed in the receiving cavity, and the other end which can extend out or retract into the receiving cavity through the opening;

[0049] A locking spring is disposed within the receiving cavity, with one end fixedly connected to the lock body and the other end connected to the lock tongue;

[0050] A release spring is disposed within the receiving cavity, with one end fixedly connected to the lock body and the other end connected to the lock tongue; the release spring is a shape memory alloy spring.

[0051] The main frame has multiple locking slots, each corresponding to a locking tongue. When the release spring is energized, its length shortens, pulling the locking tongue out of the locking slot and compressing the locking spring. When the release spring is de-energized, the locking tongue re-enters the locking slot under the restoring force of the locking spring.

[0052] Preferably, the modular retractable chassis configuration for electric vehicles further includes:

[0053] Multiple sets of cooling water channels are respectively arranged on the inner side of the H-shaped frame.

[0054] Preferably, both ends of the first telescopic beam and both ends of the second telescopic beam are provided with arc-shaped portions that bend toward the connecting body.

[0055] The beneficial effects of this invention are:

[0056] The invention provides a modular, retractable chassis configuration for electric vehicles, which allows for changes in the chassis's axial length to accommodate models with different wheelbases. By modifying the chassis's axial length, power batteries with varying driving ranges can be installed, thus adapting to electric vehicles with different driving ranges. Attached Figure Description

[0057] Figure 1 This is a schematic diagram of the overall structure of the modular retractable chassis configuration for electric vehicles described in this invention.

[0058] Figure 2 This is a schematic diagram of the structure of the first telescopic body described in this invention.

[0059] Figure 3 This is a schematic diagram of the structure of the connector described in this invention.

[0060] Figure 4 This is a schematic diagram of the power battery compartment described in this invention.

[0061] Figure 5 This is a schematic diagram of the locking mechanism described in this invention.

[0062] Figure 6 This is a schematic diagram of the front collapsible beam described in this invention.

[0063] Figure 7 This is a schematic diagram illustrating the structure and fit of the locking element and locking nut described in this invention.

[0064] Figure 8 for Figure 3 Enlarged diagram of point A in the middle.

[0065] Figure 9 for Figure 4 Enlarged diagram of point B in the middle. Detailed Implementation

[0066] The present invention will now be described in further detail with reference to the accompanying drawings, so that those skilled in the art can implement it based on the description.

[0067] like Figure 1-9As shown, the present invention provides a modular retractable chassis configuration for an electric vehicle, comprising: a first retractable body 1, a first retractable body crossbeam 101, a first retractable body transverse side beam 102, a first retractable body longitudinal side beam 103, a locking slot 104, a guide sleeve 105, a mounting boss 106, a third fixing post 107, and a first retractable body longitudinal beam 108; a connecting body 2, a connecting body longitudinal side beam 201, and a connecting body crossbeam 202; a second retractable body 3, a second retractable body crossbeam 301, a second retractable body transverse side beam 302, a second retractable body longitudinal side beam 303, and a second retractable body longitudinal beam 304; and a front collapsible beam 4. The components include: an arched beam 401, a connecting plate 402, a front collapsible beam and longitudinal beam 403, a first-level collapsible space 4a, a second-level collapsible space 4b, and a third-level collapsible space 4c; a locking and limiting mechanism 5, a limiting slider 501, a locking slider 502, a first limiting rod 503, and a second limiting rod 504; a power battery compartment 6, a base plate 601, a H-shaped frame 602, and a cooling water channel 603; a rear collapsible beam 7; a locking device 8, a locking top rod 801, a threaded locking element 802, and a locking nut 803; and a locking mechanism 9, a lock body 901, a locking tongue 902, a release spring 903, and a locking spring 904.

[0068] The connecting body 2 includes a connecting body crossbeam 202 and two connecting body longitudinal side beams 201. The two connecting body longitudinal side beams 201 are symmetrically arranged, and the two ends of the connecting body crossbeam 202 are fixedly connected to the middle positions of the two connecting body longitudinal side beams 201, respectively, and the connecting body crossbeam 201 is perpendicular to the connecting body longitudinal side beams 202.

[0069] The first telescopic body 1 is disposed at one end of the connecting body 2. The first telescopic body 1 mainly includes: a first telescopic body crossbeam 101, multiple first telescopic body longitudinal beams 108, a first telescopic body transverse side beam 102, and two first telescopic body longitudinal side beams 103. The first telescopic body 1 is used to install the front wheel, which can adopt other drive forms such as hub motor or wheel-side motor.

[0070] The first telescopic body crossbeam 101 and the first telescopic body side beam 102 are arranged parallel to each other at intervals. One end of a plurality of first telescopic body longitudinal beams 108 is fixedly connected to the first telescopic body crossbeam 101, and the other end is fixedly connected to the first telescopic body side beam 102. The plurality of first telescopic body longitudinal beams 108 are arranged at intervals along the axial direction (lateral direction of the chassis) of the first telescopic body side beam 102. In this embodiment, there are two first telescopic body longitudinal beams 108.

[0071] The first telescopic body transverse beam 102 is perpendicular to the first telescopic body longitudinal beam 103, and both ends of the first telescopic body transverse beam 102 are fixedly connected to one end of the two first telescopic body longitudinal beams 103. The first telescopic body longitudinal beams 103 are parallel to and correspond one-to-one with the connecting body longitudinal beams 201; the other end of the first telescopic body longitudinal beam 103 is connected to the connecting body longitudinal beam 201 and can slide along the axial direction of the connecting body longitudinal beam 201.

[0072] The second telescopic body 3 is located at the other end of the connecting body 2. The second telescopic body 3 includes: a second telescopic body crossbeam 301, multiple second telescopic body longitudinal beams 304, a second telescopic body transverse side beam 302, and two second telescopic body longitudinal side beams 303. The second telescopic body 3 is used to install the rear wheel, which can adopt other drive forms such as hub motor or wheel-side motor.

[0073] The second telescopic body crossbeam 301 and the second telescopic body side beam 302 are arranged parallel to each other and spaced apart. One end of the second telescopic body longitudinal beam 304 is fixedly connected to the second telescopic body crossbeam 301, and the other end is fixedly connected to the second telescopic body side beam 302. Multiple second telescopic body longitudinal beams 304 are arranged spaced apart along the axial direction (lateral direction of the chassis) of the second telescopic body side beam 302. In this embodiment, there are two second telescopic body longitudinal beams 304.

[0074] The second telescopic body transverse beam 302 is perpendicular to the second telescopic body longitudinal beam 303, and both ends of the second telescopic body transverse beam 302 are fixedly connected to one end of each of the two second telescopic body longitudinal beams 303. The second telescopic body longitudinal beams 303 are parallel to and correspond one-to-one with the connecting body longitudinal beam 201; the other end of the second telescopic body longitudinal beam 303 is connected to the connecting body longitudinal beam 201 and can slide along the axial direction of the connecting body longitudinal beam 201.

[0075] The first telescopic body 1 and the second telescopic body 3 are used to install the front wheel and the rear wheel, respectively. By changing the position of the first telescopic body 1 and the second telescopic body 3 relative to the connecting body 2, the wheelbase of the chassis can be adjusted. When the first telescopic body 1 and the second telescopic body 2 are far away from the connecting body 3, the wheelbase of the chassis increases. When the first telescopic body 1 and the second telescopic body 3 are close to the connecting body 2, the wheelbase of the chassis decreases.

[0076] like Figure 2-3As shown, in this embodiment, a cavity is formed axially within the first telescopic longitudinal beam 103, and a guide sleeve 105 is fixedly installed within the cavity. Guide rods 201a are coaxially installed at both ends of the connecting longitudinal beam 201, and the guide rods 201a are matched and installed within the guide sleeve 105; thus enabling a sliding connection between the first telescopic longitudinal beam 103 and the connecting longitudinal beam 201. The connection method between the second telescopic longitudinal beam 303 and the connecting longitudinal beam 201 is the same as that between the first telescopic longitudinal beam 103 and the connecting longitudinal beam 201, and will not be described again here.

[0077] As a preferred embodiment, both ends of the first telescopic beam 101 and both ends of the second telescopic beam 301 are respectively provided with arc-shaped portions that bend toward the connecting body, so as to improve the strength of both ends of the first telescopic beam 101 and both ends of the second telescopic beam 301.

[0078] The limiting locking mechanism 5 is used to fix the first telescopic body 1 and the second telescopic body 3 onto the connecting body 2.

[0079] In this embodiment, the limiting locking mechanism 5 includes: a limiting slider 501, a locking slider 502, a first limiting pull rod 503, a second limiting pull rod 504, a first fixing post 505, and a second fixing post 506.

[0080] Two guide grooves are formed axially at the top of the connecting beam 202. The two guide grooves are located near the left and right sides of the connecting beam 202 (corresponding to the front and rear of the chassis), respectively. Limiting sliders 501 are correspondingly arranged in the guide grooves. Locking sliders 502 are also matched and arranged in the two guide grooves. The locking sliders 502 can move along the guide grooves or be locked on the connecting beam 202.

[0081] Two first fixing posts 505 are fixedly mounted on the limiting slider 501 in a one-to-one correspondence. Two second fixing posts 506 are fixedly mounted on the locking slider 502, and their positions correspond one-to-one with those of the two first fixing posts 505.

[0082] Four third fixed columns 107 are installed one-to-one at the top of the connection between the first telescopic body horizontal beam 102 and the two first telescopic body longitudinal beams 103, and at the top of the connection between the second telescopic body horizontal beam 302 and the two second telescopic body longitudinal beams 303.

[0083] Two first limiting rods 503 are symmetrically arranged on both sides of the connecting body beam 202; each end of the first limiting rod 503 has a through hole, and it is rotatably sleeved on the first fixed post 505 and the third fixed post 107 arranged on the same side as the first fixed post 505 through the through holes at both ends.

[0084] Two second limiting rods 504 are symmetrically arranged on both sides of the connecting beam 202. Each end of the second limiting rod 504 has a through hole, and it is rotatably sleeved onto the second fixed post 506 and the third fixed post 107 located on the same side as the second fixed post 506 through these through holes. The limiting mechanism restricts the movement range of the first telescopic body 1 and the second telescopic body 3 relative to the connecting body 2, preventing them from detaching from the connecting body when the chassis dimensions change. In addition to restricting the movement of the telescopic bodies, the limiting rod structure, together with the telescopic bodies and the connecting body, divides the chassis structure into multiple triangular and trapezoidal combinations, resulting in better structural stability after locking.

[0085] In one embodiment, the locking slider 502 is locked to the connecting beam 202 by the locking device 8. Figure 3 , Figure 7 As shown, the locking device 8 includes a locking rod 801, a threaded locking element 802, and a locking nut 803.

[0086] One end of the locking rod 801 is positioned towards the longitudinal beam 201 (near the limit slider 501). Two threaded locking elements 802 are spaced apart and fitted onto the locking rod 801. The base plate of the threaded locking element 802 is riveted to the connecting body beam 202. The locking rod 801 can move axially relative to the threaded locking elements 802. The other end of the locking rod 801 is connected to a rectangular block with countersunk screw holes. It is connected to the locking slider 502 by bolts. When the telescopic body is adjusted to the predetermined position, tightening the locking nut 803 restricts the movement of the locking rod 801, thereby locking the locking slider 502. This fixes the position of the first telescopic body 1 and the second telescopic body 3 relative to the connecting body 2. The fixed chassis dimensions are used for installing other accessories.

[0087] The power battery compartment 6 is detachably mounted on the main frame consisting of the 2 connecting bodies, the first telescopic body 1, and the second telescopic body 3.

[0088] like Figure 4 As shown, in this embodiment, the power battery compartment 6 includes: a base plate 601, a U-shaped frame 602, and a cooling water channel 603. The base plate 601 is a rectangular flat plate, which is located at the bottom of the main frame and supports the power battery pack. Two U-shaped frames 602 are respectively fixedly installed on the base plate 601, and the two U-shaped frames 602 are symmetrically arranged on both sides of the connecting beam 202; wherein, the two ends of the U-shaped frames 602 are close to the two connecting longitudinal beams 201. The interiors of the two U-shaped frames 602 form a total of 4 power battery accommodating spaces. Using the U-shaped frame structure as the frame of the battery compartment can improve the strength of the battery compartment and correspondingly improve the strength of the chassis structure.

[0089] The power battery is housed within a space comprised of the first telescopic body, the second telescopic body, and the connecting body 2, making full use of the vehicle chassis space and achieving integration of the chassis and power battery. This increases the ground clearance of the power battery, protecting it. Simultaneously, the frame of the power battery compartment 6 serves as part of the chassis structure, improving chassis rigidity and torsional strength. The housing space for the power battery can be altered by changing the positions of the first telescopic body 1 and the second telescopic body 3 relative to the connecting body 2. When the first and second telescopic bodies are further away from the connecting body, the housing space increases (allowing for a larger power battery compartment 6); when the first and second telescopic bodies are closer to the connecting body 2, the housing space decreases.

[0090] In practical applications, the battery compartment frame can be widened to provide higher strength and rigidity, preventing the power battery from deforming during a vehicle collision and posing a safety hazard.

[0091] In this embodiment, the power battery compartment 6 is connected to the main frame by four locking mechanisms 9, which are respectively located at the four top corners of the power battery compartment 6.

[0092] like Figure 5 As shown, the locking mechanism 9 includes: a lock body 901, a lock tongue 902, a release spring 903, and a locking spring 904.

[0093] The lock body 901 is embedded and fixedly mounted on the H-shaped frame 602 of the power battery compartment 6. The lock body 901 has a receiving cavity with one end open. One end of the latch 902 is disposed in the receiving cavity, and the other end can extend or retract into the receiving cavity through the opening.

[0094] A locking spring 904 is disposed within the receiving cavity. One end of the locking spring 904 is fixedly connected to the lock body 901, and the other end is connected to the latch 902. The locking spring 904 is a common helical spring. When the latch 902 is fully extended from the lock body, the locking spring 904 maintains its original length. When the lock body retracts, the locking spring 904 is compressed.

[0095] A release spring 903 is disposed within the receiving cavity. One end of the release spring 903 is fixedly connected to the lock body 901, and the other end is connected to the latch 902. The release spring 903 is a shape memory alloy helical spring, which can deform and elongate with the movement of the latch 902 at room temperature. When energized, it will contract and drive the latch 902 to move, causing the latch to retract into the lock body 901 and release the power battery compartment 6. The main frame has multiple locking slots 104, each corresponding to a latch 902. When the release spring 903 is energized, its length shortens, pulling the latch 902 out of the locking slot 104 and compressing the locking spring 904. When the release spring 903 is de-energized, the latch 902, under the restoring force of the locking spring 904, enters the locking slot 104, locking the power battery compartment 6 onto the main frame of the chassis.

[0096] As a preferred embodiment, a guide boss 905 is provided on the inner wall of the lower side of the lock body 901, and a positioning groove is provided on the lower side of the inner end of the lock body 901 (the end located in the lock body receiving cavity). The guide boss 905 matches the positioning groove and guides the movement of the bolt 902, ensuring the linear movement of the bolt 902 and preventing the bolt 902 from producing any movement other than popping out and retracting within the lock body 901.

[0097] A release spring hook and a guide post hole are provided on one end of the latch 902 located within the lock body cavity (inner end of the latch). The release spring hook and the guide post hole are located on both sides of the positioning groove. The release spring hook is used to connect the release spring 903, which is wrapped with insulating material. One end of the guide post is fixedly connected to the bottom (innermost end) of the lock body cavity. The locking spring 904 is sleeved on the guide post. The other end of the guide post is located in the guide hole and can move axially along the guide post hole. The two ends of the locking spring 904 abut against the bottom of the lock body cavity and the inner end face of the latch, respectively. The guide post guides the extension and retraction of the locking spring 904.

[0098] The locking tongue 902 is a beveled locking tongue, that is, the outer end face is beveled and the inner end face (the end located in the lock body cavity) is flat. When the power battery compartment 6 is installed, the beveled end of the locking tongue can be retracted by being squeezed. After the power battery compartment 6 is installed in place, the locking tongue 902 pops out under the action of the locking spring 903 and locks the power battery compartment 6 in the locking slot 104.

[0099] As a further preferred embodiment, multiple sets of cooling water channels 603 are provided on the inner wall of the power battery compartment 6 frame. In this embodiment, the cooling water channels 603 are provided in two sets, respectively located on the inner side of the H-shaped frame 602, and arranged at intervals along the height direction of the H-shaped frame 602. That is, two sets of cooling water channels 603 are provided on the walls of each of the four power battery compartments.

[0100] The cooling water channel 603 ensures battery heat dissipation and prevents battery heat from entering the lock body 901 of the locking mechanism 9 and affecting the performance of the release spring 903.

[0101] The front collapsible beam 4 is fixedly connected to the first telescopic body crossbeam 101. The front collapsible beam 4 includes a front collapsible beam crossbeam 401 and multiple front collapsible beam longitudinal beams 402. One end of each front collapsible beam longitudinal beam 402 is fixedly connected to the front collapsible beam crossbeam 401, and the other end is fixedly connected to a mounting boss 106 provided on the first telescopic body crossbeam 101. The front collapsible beam longitudinal beams 402 are perpendicular to the first telescopic body crossbeam 101, and the multiple front collapsible beam longitudinal beams 101 are spaced apart along the axial direction (lateral direction of the chassis) of the first telescopic body crossbeam 101. The rear collapsible beam 7 is fixedly connected to the second telescopic body crossbeam 301 and is symmetrically arranged with the front collapsible beam 4. The rear collapsible beam 7 includes a rear collapsible beam crossbeam 701 and multiple rear collapsible beam longitudinal beams 702. One end of the rear collapsible beam longitudinal beam 702 is fixedly connected to the rear collapsible beam transverse beam 701, and the other end is fixedly connected to the second telescopic body transverse beam 301; the rear collapsible beam longitudinal beam 702 is perpendicular to the second telescopic body transverse beam 301, and multiple rear collapsible beam longitudinal beams 702 are spaced apart along the axial direction of the second telescopic body transverse beam 301.

[0102] like Figure 6 As shown, the front collapsible beam crossbeam 401 includes a connecting plate 401a and an arched beam 401b. The connecting plate 401a is arranged parallel to the first telescopic body crossbeam 101; one side of the connecting plate 401a is connected to the front collapsible beam longitudinal beam 402, and the other side is connected to the arched beam 401b; the concave side of the arched beam 401b faces the connecting plate 401a, and both ends of the arched beam 401b are respectively connected to the connecting plate 401a. The arched beam 401b is composed of multiple concave hexagons arranged laterally and connected. The structure and connection method of the rear collapsible beam crossbeam 701 are the same as those of the front collapsible beam crossbeam 401, and will not be described again here.

[0103] Both the front crumple beam 4 and the rear crumple beam 7 are three-stage crumple zones. Taking the front crumple beam 4 as an example, the first-stage crumple space 4a is an arched beam 401b composed of multiple concave hexagonal thin-walled structures arranged laterally. When a vehicle collides, the concave hexagons crumple and absorb energy guided by their corner points. The arched beam 401b is an arched structure with a certain curvature, which can better adapt to the vehicle's body shape curve and ensure the vehicle's aerodynamic performance. At the same time, the space between the arched beam 401b and the connecting plate 401a serves as the second-stage energy absorption space 4b. Each concave hexagon of the arched beam 401b has a vertically penetrating groove 401c on the side facing the connecting plate 401a. When a vehicle collides head-on, the grooves 401c on the arched beam 401b are crushed and absorb energy. The third-level crumple zone 4c is the crumple beam 402. The crumple beam 402 also adopts a concave hexagonal thin-walled structure. When the vehicle is involved in a frontal collision, the concave hexagonal thin-walled longitudinal beam is crushed and absorbs energy.

[0104] Setting up a front crumple beam 4 and a rear crumple beam 7 can prevent the first telescopic body 1 and the second telescopic body 3 from deforming and encroaching on the power battery space after being subjected to impact force during a frontal or rearward collision, thus avoiding a threat to vehicle safety.

[0105] Although embodiments of the present invention have been disclosed above, they are not limited to the applications listed in the specification and embodiments. They can be applied to various fields suitable for the present invention. For those skilled in the art, other modifications can be easily made. Therefore, without departing from the general concept defined by the claims and their equivalents, the present invention is not limited to the specific details and illustrations shown and described herein.

Claims

1. A modular retractable chassis configuration for electric vehicles, characterized in that, include: The connector includes a crossbeam and two longitudinal side beams. The two connecting body longitudinal side beams are symmetrically arranged, and the two ends of the connecting body cross beam are fixedly connected to the middle positions of the two connecting body longitudinal side beams respectively, and the connecting body cross beam is perpendicular to the connecting body longitudinal side beams. The first telescopic body, which is disposed at one end of the connecting body, includes: a first telescopic body crossbeam, a plurality of first telescopic body longitudinal beams, a first telescopic body transverse side beam and two first telescopic body longitudinal side beams; The first telescopic body crossbeam and the first telescopic body side beam are arranged parallel to each other at intervals. One end of the first telescopic body longitudinal beam is fixedly connected to the first telescopic body crossbeam, and the other end is fixedly connected to the first telescopic body side beam. The first telescopic body's transverse beam is perpendicular to the first telescopic body's longitudinal beam, and the two ends of the first telescopic body's transverse beam are respectively fixedly connected to the two first telescopic body's longitudinal beams; The first telescopic body longitudinal beam is parallel to and corresponds to the connecting body longitudinal beam; the first telescopic body longitudinal beam is connected to the connecting body longitudinal beam and can slide along the axial direction of the connecting body longitudinal beam. The second telescopic body, which is disposed at the other end of the connecting body, includes: a second telescopic body crossbeam, multiple second telescopic body longitudinal beams, a second telescopic body transverse side beam, and two second telescopic body longitudinal side beams; The second telescopic body crossbeam and the second telescopic body side beam are arranged parallel to each other at intervals. One end of the second telescopic body longitudinal beam is fixedly connected to the second telescopic body crossbeam, and the other end is fixedly connected to the second telescopic body side beam. The second telescopic body's transverse beam is perpendicular to the second telescopic body's longitudinal beam, and both ends of the second telescopic body's transverse beam are fixedly connected to the two second telescopic body's longitudinal beams, respectively. The second telescopic body longitudinal beam is parallel to and corresponds to the connecting body longitudinal beam; the second telescopic body longitudinal beam is connected to the connecting body longitudinal beam and can slide along the axial direction of the connecting body longitudinal beam. A limiting locking mechanism is used to limit the positions of the first telescopic body and the second telescopic body relative to the connecting body; The limiting locking mechanism includes: Two limit sliders; The connecting beam has two guide grooves along the axial direction at its top, and the limiting sliders are respectively arranged in the guide grooves. A locking slider is simultaneously matched and disposed in the two guide grooves; The locking slider can move along the guide groove or be locked on the connecting beam; Two first fixed posts are fixedly mounted on the limiting slider in a one-to-one correspondence; Two second fixing posts are fixedly mounted on the locking slider and correspond one-to-one with the positions of the two first fixing posts; Four third fixed columns are set one-to-one at the top of the connection between the first telescopic body horizontal beam and the two first telescopic body longitudinal beams, and at the top of the connection between the second telescopic body horizontal beam and the two second telescopic body longitudinal beams. Two first limiting rods are symmetrically arranged on both sides of the connecting beam; each of the two ends of the first limiting rod has a through hole, and it is rotatably sleeved on the first fixed post and the third fixed post arranged on the same side as the first fixed post through the through holes at both ends. Two second limiting rods are symmetrically arranged on both sides of the connecting beam; each of the two ends of the second limiting rod has a through hole, and is rotatably sleeved on the second fixing post and the third fixing post arranged on the same side as the second fixing post through the through holes at both ends.

2. The modular retractable chassis configuration for electric vehicles according to claim 1, characterized in that, It also includes a power battery compartment, which is detachably mounted on the main frame composed of the connecting body, the first telescopic body and the second telescopic body.

3. The modular retractable chassis configuration for electric vehicles according to claim 2, characterized in that, The power battery compartment includes: The base plate is located at the bottom of the main frame; Two H-shaped frames are fixedly installed on the base plate, and the two H-shaped frames are symmetrically arranged on both sides of the connecting beam; The two ends of the sun-shaped frame are respectively close to the two longitudinal side beams of the connecting body.

4. The modular retractable chassis configuration for electric vehicles according to claim 3, characterized in that, The first telescopic body longitudinal beam and the second telescopic body longitudinal beam are provided with guide sleeves along the axial direction inside, and guide rods are respectively provided on both ends of the connecting body longitudinal beam; the guide rods are matched and arranged in the guide sleeves.

5. The modular retractable chassis configuration for electric vehicles according to claim 3 or 4, characterized in that, Also includes: A front collapsible beam is fixedly connected to the first telescopic body crossbeam; the front collapsible beam includes a front collapsible beam crossbeam and multiple front collapsible beam longitudinal beams. Wherein, one end of the longitudinal beam of the front collapsible beam is fixedly connected to the transverse beam of the front collapsible beam, and the other end is fixedly connected to the transverse beam of the first telescopic body; the longitudinal beam of the front collapsible beam is perpendicular to the transverse beam of the first telescopic body, and the plurality of longitudinal beams of the front collapsible beam are spaced apart along the axial direction of the transverse beam of the first telescopic body; and The rear collapsible beam is fixedly connected to the second telescopic body crossbeam; the rear collapsible beam includes a rear collapsible beam crossbeam and multiple rear collapsible beam longitudinal beams. Wherein, one end of the rear collapsible beam longitudinal beam is fixedly connected to the rear collapsible beam transverse beam, and the other end is fixedly connected to the second telescopic body transverse beam; the rear collapsible beam longitudinal beam is perpendicular to the second telescopic body transverse beam, and the plurality of rear collapsible beam longitudinal beams are spaced apart along the axial direction of the second telescopic body transverse beam.

6. The modular retractable chassis configuration for electric vehicles according to claim 5, characterized in that, The front collapsible beam includes: A connecting plate, which is arranged parallel to the first telescopic body beam; The connecting plate is connected to the longitudinal beam of the front collapsible beam on one side, and a groove is provided on the other side of the connecting plate. An arc-shaped beam, with its concave side facing the connecting plate, has its two ends respectively connected to the slide groove via sliders; The bow-shaped beam is composed of multiple concave hexagons arranged and connected laterally.

7. The modular retractable chassis configuration for electric vehicles according to claim 6, characterized in that, The power battery compartment is connected to the main frame by four locking mechanisms, which are respectively located at the four top corners of the power battery compartment. The locking mechanism includes: The lock body is fixedly installed on the power battery compartment, and the lock body has a receiving cavity with one end open; A locking tongue, one end of which is disposed in the receiving cavity, and the other end which can extend out or retract into the receiving cavity through the opening; A locking spring is disposed within the receiving cavity, with one end fixedly connected to the lock body and the other end connected to the lock tongue; A release spring is disposed within the receiving cavity, with one end fixedly connected to the lock body and the other end connected to the lock tongue; the release spring is a shape memory alloy spring. The main frame has multiple locking slots, each corresponding to a locking tongue. When the release spring is energized, its length shortens, pulling the locking tongue out of the locking slot and compressing the locking spring. When the release spring is de-energized, the locking tongue re-enters the locking slot under the restoring force of the locking spring.

8. The modular retractable chassis configuration for electric vehicles according to claim 7, characterized in that, Also includes: Multiple sets of cooling water channels are respectively arranged on the inner side of the H-shaped frame.

9. The modular retractable chassis configuration for electric vehicles according to claim 8, characterized in that, Both ends of the first telescopic beam and both ends of the second telescopic beam are respectively provided with arc-shaped portions that bend toward the connecting body.

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