A compressive strength testing device for electric vehicle frame

Abstract

The present invention discloses a device for testing the compressive strength of an electric vehicle frame, and relates to the technical field of electric vehicle testing, comprising a fixed outer frame, on which a fixed inner frame is slidably arranged; a pressure device is arranged on the fixed outer frame, and the position of the pressure device corresponds to the position of the fixed inner frame up and down; an intermediate frame is arranged on the fixed inner frame, and two opposite ends of the intermediate frame are respectively provided with a support assembly 1 and a support assembly 2; the support assembly 1 comprises a buffer support arranged on the bottom surface of the fixed inner frame, and one end of the buffer support away from the bottom surface of the fixed inner frame contacts the intermediate frame, and a fixed shaft is movably arranged on the fixed inner frame, and the fixed shaft movably passes through the intermediate frame and the buffer support in sequence; the support assembly 2 comprises a cushion block slidably arranged on the bottom surface of the fixed inner frame, and the cushion block contacts the intermediate frame, and a spring support is arranged at one end of the intermediate frame close to the cushion block. The present invention has the advantages of being able to perform diversified testing according to different needs.

Description

Technical Field

[0001] The invention relates to the technical field of electric vehicle detection, and in particular to a device for detecting the compressive strength of an electric vehicle frame. Background Art

[0002] After welding, the electric vehicle frame needs to be tested for strength in order to ensure the stability and safety of the vehicle during driving. Most of the existing pressure test devices are fixed in position, which is not convenient for multi-position testing of the electric vehicle frame or testing under simulated bumpy road conditions according to different testing needs, thereby reducing the accuracy of the pressure strength test of the electric vehicle frame. Summary of the invention

[0003] In view of the above-mentioned technical deficiencies, the technical problem to be solved by the present invention is to provide an electric vehicle frame compressive strength testing device that can perform diversified testing according to different needs.

[0004] In order to solve the above technical problems, the present invention provides a device for detecting the compressive strength of an electric vehicle frame, comprising:

[0005] A fixed outer frame, on which a fixed inner frame is slidably arranged;

[0006] A pressure device, which is arranged on the fixed outer frame, and the position of the pressure device corresponds to the position of the fixed inner frame in the upper and lower directions;

[0007] The middle frame is arranged on the fixed inner frame, and two opposite ends of the middle frame are respectively provided with a support assembly 1 and a support assembly 2;

[0008] The first support assembly includes a buffer support arranged on the bottom surface of the fixed inner frame, one end of the buffer support away from the bottom surface of the fixed inner frame contacts the intermediate frame, a fixed shaft is movably arranged on the fixed inner frame, and the fixed shaft movably passes through the intermediate frame and the buffer support in sequence;

[0009] The second supporting assembly comprises a cushion block which is slidably arranged on the bottom surface of the fixed inner frame, the cushion block is in contact with the middle frame body, and a spring support is arranged at one end of the middle frame body close to the cushion block.

[0010] Preferably, the fixed outer frame is a U-shaped structure, and the pressure device comprises:

[0011] A slide groove, which is arranged on a U-shaped opening of a fixed outer frame;

[0012] A base, the base is slidably arranged on the slide groove;

[0013] The press machine is arranged on a base, and the position of the base corresponds to the position of the intermediate frame up and down. The position of the base is adjusted by sliding on the slide slot to detect different detection parts.

[0014] Preferably, the fixed inner frame is a U-shaped structure, the U-shaped opening direction of the fixed inner frame is the same as the U-shaped opening direction of the fixed outer frame, and the fixed inner frame is slidably arranged in the U-shaped opening of the fixed outer frame, so that the fixed inner frame can be slidably adjusted in the U-shaped opening of the fixed outer frame, and different detection parts on the electric vehicle frame can be detected.

[0015] Preferably, the intermediate frame is a rectangular frame structure, in which a cylinder seat is arranged, and locking cylinders are embedded in two opposite inner walls of the cylinder seat, and the piston rod of the locking cylinder movably passes through the other two opposite ends of the cylinder seat, and an insertion shaft is arranged on the piston rod of the locking cylinder. A plurality of insertion holes corresponding to the insertion shafts are arranged on the inner wall of the U-shaped opening of the fixed outer frame, and the insertion shafts are movably inserted in the insertion holes at corresponding positions, so that the locking cylinder can insert the insertion shafts into the insertion holes at corresponding positions, so that the intermediate frame can be rotated and bumped up and down during detection, so as to simulate different road conditions for detection.

[0016] Preferably, the buffer support is connected to the bottom surface of the U-shaped opening of the fixed inner frame through multiple compression springs, and multiple brackets are vertically arranged on the side of the buffer support facing away from the compression spring, and a fixed circular shaft is horizontally arranged on the bracket, and a semicircular groove corresponding to the position of the fixed circular shaft is arranged on the middle frame, and the fixed circular shaft is rotatably arranged in the semicircular groove, and a plurality of card slots corresponding to the brackets are arranged on the semicircular groove, and the brackets are respectively located in the card slots at corresponding positions, so that the end of the middle frame close to the buffer support can be rotated up and down through the compression spring to simulate different road conditions for detection.

[0017] Preferably, the fixed shaft movably passes through the intermediate frame and the fixed circular shaft in sequence, and both ends of the U-shaped opening of the fixed inner frame are respectively provided with mounting seats corresponding to the two ends in the length direction of the fixed shaft, and the two ends in the length direction of the fixed shaft are respectively movably inserted in the mounting seats at corresponding positions, and both ends of the U-shaped opening of the fixed outer frame are also provided with through grooves corresponding to the mounting seats. According to detection needs, the fixed shaft can be installed in the fixed circular shaft to fix the position of the intermediate frame; or the fixed shaft can be taken out of the fixed circular shaft to realize up and down rotation and bumping, so as to simulate different road conditions for detection.

[0018] Preferably, a support seat is arranged on the bottom surface of the U-shaped opening of the fixed inner frame, a cylinder seat is arranged on the support seat, a pushing cylinder is embedded on the inner wall of the support seat away from the buffer support end, and a cushion block is arranged on the piston rod of the pushing cylinder. According to the detection requirements, the cushion block can be used to realize the up and down rotation and bumping of the intermediate frame so as to simulate different road conditions for detection.

[0019] Preferably, the spring support comprises:

[0020] A semicircular ring-shaped support cover, wherein one end of the arc-shaped opening of the semicircular ring-shaped support cover is hinged to one end of the intermediate frame body close to the cushion block;

[0021] A return spring group, wherein a plurality of return spring groups are provided, and the plurality of return spring groups are arranged in parallel and spaced apart on the inner wall of the arc-shaped opening of the semicircular ring support cover;

[0022] The intermediate shaft is arranged in the arc-shaped opening of the semicircular ring support cover, and the outer peripheral wall of the intermediate shaft is connected to the return spring group. When the spring support is used to realize the up and down bumping of the intermediate frame, buffering can be achieved through each return spring group.

[0023] Preferably, the return spring group includes a plurality of return springs evenly distributed along the circumference of the intermediate shaft, and the two ends of the return spring in the length direction are respectively connected to the inner wall of the arc-shaped opening of the semicircular support cover and the outer peripheral wall of the intermediate shaft. When the spring support is used to realize the up and down bumps of the intermediate frame, buffering can be achieved by each return spring.

[0024] The beneficial effects of the present invention are: 1. The present invention facilitates detection at different positions on the electric vehicle frame as needed by slidingly adjusting the position of the fixed inner frame in the fixed outer frame and slidingly adjusting the base in the slide groove, thereby improving the diversity and convenience of detection.

[0025] 2. By installing a fixed shaft, the electric vehicle frame fixed on the intermediate frame will not rotate or move when pressure is applied, and the electric vehicle frame can be subjected to static pressure testing as needed.

[0026] 3. After removing the fixed shaft, the compression springs and return spring groups arranged at the opposite ends of the intermediate frame can play a buffering and rebounding role when pressure is applied to the electric vehicle frame, which is conducive to making the intermediate frame rotate up and down when pressure is applied, so as to simulate different road conditions for testing. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0028] Figure 1 A schematic structural diagram of a device for detecting the compressive strength of an electric vehicle frame provided in an embodiment of the present invention.

[0029] Figure 2 A schematic diagram of the position of a support assembly of an electric vehicle frame compressive strength testing device provided by an embodiment of the present invention.

[0030] Figure 3 A structural schematic diagram of a support assembly of an electric vehicle frame compressive strength testing device provided by an embodiment of the present invention.

[0031] Figure 4 A schematic diagram of the spring support position of an electric vehicle frame compressive strength testing device provided in an embodiment of the present invention.

[0032] Figure 5 A schematic diagram of the positions of the semicircular grooves and the card slots of a compressive strength testing device for an electric vehicle frame provided in an embodiment of the present invention.

[0033] Figure 6 A schematic diagram of a bracket connected to a fixed circular shaft structure of an electric vehicle frame compressive strength testing device provided by an embodiment of the present invention.

[0034] Figure 7 A schematic diagram of the structure of a return spring group of an electric vehicle frame compressive strength testing device provided in an embodiment of the present invention.

[0035] Figure 8 A schematic diagram of the position of a jack of a device for testing the compressive strength of an electric vehicle frame provided in an embodiment of the present invention.

[0036] Explanation of the reference numerals in the accompanying drawings: 1. Fixed outer frame; 2. Fixed inner frame; 21. Support seat; 22. Push cylinder; 3. Pressure device; 31. Base; 32. Slide groove; 33. Press; 4. Intermediate frame; 41. Cylinder seat; 42. Locking cylinder; 43. Insert shaft; 431. Insert hole; 44. Semicircular groove; 45. Slot; 5. Support component one; 51. Buffer support; 511. Compression spring; 512. Bracket; 513. Fixed circular shaft; 52. Fixed shaft; 521. Mounting seat; 522. Through groove; 6. Support component two; 61. Pad; 62. Spring support; 621. Semicircular ring support cover; 622. Return spring group; 623. Intermediate shaft; 624. Return spring. DETAILED DESCRIPTION

[0037] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0038] Embodiment 1

[0039] like Figures 1 to 4As shown, the present invention provides a compressive strength testing device for an electric vehicle frame, comprising a fixed outer frame 1, on which a fixed inner frame 2 is slidably arranged; a pressure device 3 is arranged on the fixed outer frame 1, and the position of the pressure device 3 corresponds to the position of the fixed inner frame 2 in the upper and lower directions; an intermediate frame body 4 is arranged on the fixed inner frame 2, and the opposite ends of the intermediate frame body 4 are respectively provided with a support assembly 1 5 and a support assembly 2 6; wherein the support assembly 1 5 comprises a buffer support 51 arranged on the bottom surface of the fixed inner frame 2, and one end of the buffer support 51 away from the bottom surface of the fixed inner frame 2 contacts the intermediate frame body 4, and a fixed shaft 52 is movably arranged on the fixed inner frame 2, and the fixed shaft 52 movably penetrates the intermediate frame body 4 and Buffer support 51; support assembly 2 6 includes a pad 61 slidably set on the bottom surface of the fixed inner frame 2, the pad 61 is in contact with the intermediate frame 4, and a spring support 62 is set at one end of the intermediate frame 4 close to the pad 61; the fixed outer frame 1 is a U-shaped structure, the pressure device 3 includes a slide groove 32, and the slide groove 32 is set on the U-shaped opening of the fixed outer frame 1; the base 31 is slidably set on the slide groove 32; the press 33 is set on the base 31, and the position of the base 31 corresponds to the position of the intermediate frame 4 up and down; the fixed inner frame 2 is a U-shaped structure, the direction of the U-shaped opening of the fixed inner frame 2 is the same as the direction of the U-shaped opening of the fixed outer frame 1, and the fixed inner frame 2 is slidably set in the U-shaped opening of the fixed outer frame 1.

[0040] Before testing, the electric vehicle frame is first installed and fixed on the intermediate frame 4, and then the position of the fixed inner frame 2 is slidably adjusted in the U-shaped opening of the fixed outer frame 1 according to different test positions, so that the electric vehicle frame on the intermediate frame 4 corresponds to the position of the pressure device 3.

[0041] When the intermediate frame 4 does not need to be rotated during detection, the support assembly 1 5 and the cushion block 61 can be used simultaneously to support the intermediate frame 4 (i.e., the fixed shaft 52 is moved through the intermediate frame 4 and the buffer support 51 in sequence to the U-shaped opening of the fixed inner frame 2, so that the intermediate frame 4 can be fixed).

[0042] When it is necessary to make the intermediate frame 4 rotate up and down during testing, the fixed shaft 52 can be removed from the intermediate frame 4 and the buffer support 51. At this time, the end of the buffer support 51 away from the bottom surface of the fixed inner frame 2 is in contact with the intermediate frame 4; then move the cushion block 61 (even if the moving cushion block 61 is not in contact with the intermediate frame 4), and then use the spring support 62 to support the intermediate frame 4; the position of the base 31 is adjusted by sliding on the slide groove 32, and the pressure resistance test of the electric vehicle frame fixed on the intermediate frame 4 can be carried out by the press 33. When the press 33 acts on different positions on the electric vehicle frame (close to one end of the buffer support 51 or close to one end of the spring support 62), the two ends of the intermediate frame 4 can be shaken up and down to simulate different road conditions for testing.

[0043] Embodiment 2

[0044] Based on the first embodiment, Figures 1 to 6 , Figure 8 As shown, the middle frame 4 is a rectangular frame structure, and a cylinder seat 41 is arranged in the middle frame 4, and locking cylinders 42 are embedded in two opposite inner walls of the cylinder seat 41, and the piston rods of the locking cylinders 42 are respectively movably penetrated through the other two opposite ends of the cylinder seat 41, and an insertion shaft 43 is arranged on the piston rod of the locking cylinder 42, and a plurality of insertion holes 431 corresponding to the insertion shafts 43 are arranged on the inner wall of the U-shaped opening of the fixed outer frame 1, and the insertion shafts 43 are respectively movably inserted in the insertion holes 431 at corresponding positions; the buffer support 51 is connected to the bottom surface of the U-shaped opening of the fixed inner frame 2 through a plurality of compression springs 511, and a plurality of brackets 512 are vertically arranged on the side of the buffer support 51 away from the compression springs 511, and a fixed circular shaft 513 is horizontally arranged on the bracket 512, and a semicircular groove 44 corresponding to the position of the fixed circular shaft 513 is arranged on the middle frame 4, and the fixed circular shaft 51 3 is rotatably arranged in the semicircular groove 44, and a plurality of slots 45 corresponding to the brackets 512 are arranged on the semicircular groove 44, and the brackets 512 are respectively located in the slots 45 at the corresponding positions; the fixed shaft 52 movably penetrates the intermediate frame body 4 and the fixed circular shaft 513 in sequence, and both ends of the U-shaped opening of the fixed inner frame 2 are respectively provided with mounting seats 521 corresponding to the two ends of the length direction of the fixed shaft 52, and the two ends of the length direction of the fixed shaft 52 are respectively movably inserted into the mounting seats 521 at the corresponding positions, and both ends of the U-shaped opening of the fixed outer frame 1 are also provided with through grooves 522 corresponding to the mounting seats 521; a support seat 21 is arranged on the bottom surface of the U-shaped opening of the fixed inner frame 2, and the cylinder seat 41 is arranged on the support seat 21, and a push cylinder 22 is embedded on the inner wall of the support seat 21 away from the end of the buffer bracket 51, and a cushion block 61 is arranged on the piston rod of the push cylinder 22.

[0045] When it is not necessary to rotate the intermediate frame 4 during testing, the fixed shaft 52 can be moved in sequence through the intermediate frame 4 and the buffer support 51 to the mounting seat 521 (while the locking cylinder 42 pushes the plug shaft 43 to the corresponding position of the plug hole 431), so that the intermediate frame 4 cannot rotate. At this time, the electric vehicle frame fixed on the intermediate frame 4 can be continuously pressurized by the press machine 33 to detect the static compressive strength of the electric vehicle frame.

[0046] When it is necessary to remove the fixed shaft 52, first start the locking cylinder 42 to drive the insertion shaft 43 to move out of the insertion hole 431, and then slide and adjust the fixed inner frame 2 in the fixed outer frame 1 so that the mounting seats 521 at both ends of the U-shaped opening of the fixed inner frame 2 correspond to the through grooves 522 at both ends of the U-shaped opening of the fixed outer frame 1, and the fixed shaft 52 can be removed from the position of the through groove 522).

[0047] When the intermediate frame 4 needs to be rotated during detection, the fixed shaft 52 is first removed, and then the locking cylinder 42 is started to insert the plug shaft 43 into the corresponding position of the inner wall of the U-shaped opening of the fixed outer frame 1; when the press machine 33 acts on the end of the electric vehicle frame close to the buffer support 51, the end of the intermediate frame 4 close to the buffer support 51 is rotated toward the bottom surface of the U-shaped opening of the fixed inner frame 2. At this time, the fixed circular shaft 513 rotates in the semicircular groove 44 to adapt to the rotation of the end of the intermediate frame 4 close to the buffer support 51 (a card slot 45 is provided so that when the intermediate frame 4 rotates, the bracket 512 can be in the card slot 45 without interference ), and at the same time, the compression spring 511 is compressed by the bracket 512 and the buffer bracket 51; when the press 33 is not in contact with the electric vehicle frame, under the action of the compression spring 511 resetting, the end of the intermediate frame 4 close to the buffer bracket 51 is rotated toward the bottom surface away from the U-shaped opening of the fixed inner frame 2, and the press 33 reciprocates, so that the intermediate frame 4 can be rotated up and down with the plug shaft 43 as the axis, and at the same time, under the action of the compression spring 511, a bumpy phenomenon occurs; at this time, the press 33 can be used to intermittently apply pressure to the electric vehicle frame fixed on the intermediate frame 4 to detect the compressive strength of the electric vehicle frame when bumps occur.

[0048] Embodiment 3

[0049] Based on the first embodiment, Figures 2 to 3 , Figure 6 to Figure 7 As shown, the spring support 62 includes a semicircular ring-shaped support cover 621, and one end of the arc-shaped opening of the semicircular ring-shaped support cover 621 is hinged to the end of the intermediate frame 4 close to the pad 61 through a rotating shaft with a torsion spring; there are multiple return spring groups 622, and the multiple return spring groups 622 are distributed in parallel and at intervals on the inner wall of the arc-shaped opening of the semicircular ring-shaped support cover 621; the intermediate shaft 623 is arranged in the arc-shaped opening of the semicircular ring-shaped support cover 621, and the outer peripheral wall of the intermediate shaft 623 is connected to the return spring group 622; the return spring group 622 includes a plurality of return springs 624 uniformly distributed along the circumference of the intermediate shaft 623, and the two ends of the return spring 624 in the length direction are respectively connected to the inner wall of the arc-shaped opening of the semicircular ring-shaped support cover 621 and the outer peripheral wall of the intermediate shaft 623.

[0050] When the spring support 62 is used for testing, the push cylinder 22 can be started first to drive the cushion block 61 to move toward the direction close to the support seat 21. At this time, the semicircular ring support cover 621 is flipped toward the direction close to the middle frame 4 under the action of the rotating shaft with the torsion spring (the middle shaft 623 fits with the middle frame 4 at this time); when the press machine 33 acts on the end of the electric vehicle frame close to the spring support 62, the end of the middle frame 4 close to the spring support 62 rotates toward the bottom surface of the U-shaped opening of the fixed inner frame 2, and the arc of the semicircular ring support cover 621 The shaped end can be in conflict with the fixed inner frame 2, and then the rotating shaft with the torsion spring can be removed. During the inspection, the intermediate frame 4 squeezes the plug shaft 43, so that each return spring group 622 can be squeezed; when the piston rod of the press 33 reciprocates and retracts, the return spring group 622 can be compressed or extended at the same time, so that the intermediate frame 4 can be bumped up and down, so as to simulate different road conditions for testing; the press 33 can be used to intermittently apply pressure to the electric vehicle frame fixed on the intermediate frame 4 to detect the compressive strength of the electric vehicle frame when bumps occur.

[0051] When the fixed shaft 52 is removed, the compression spring 511 and the return spring group 622 can be used simultaneously to intermittently apply pressure to the electric vehicle frame. The compression spring 511 and the return spring group 622 can respectively apply pressure to the two opposite ends of the intermediate frame 4 (i.e., the two opposite ends of the electric vehicle frame) and then rebound.

[0052] Since the intermediate frame 4 is a rectangular frame structure, when the intermediate frame 4 reciprocates around the insertion shaft 43 , the cushion block 61 is always located inside the intermediate frame 4 and does not interfere with the intermediate frame 4 .

[0053] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention is described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A compressive strength testing device for an electric vehicle frame, characterized in that: include: A fixed outer frame (1), on which a fixed inner frame (2) is slidably arranged; A pressure device (3), the pressure device (3) being arranged on the fixed outer frame (1), and the position of the pressure device (3) corresponding to the position of the fixed inner frame (2) in the upper and lower directions; An intermediate frame (4), the intermediate frame (4) being arranged on the fixed inner frame (2), wherein two opposite ends of the intermediate frame (4) are respectively provided with a support assembly 1 (5) and a support assembly 2 (6); The support assembly 1 (5) comprises a buffer support (51) arranged on the bottom surface of the fixed inner frame (2), one end of the buffer support (51) away from the bottom surface of the fixed inner frame (2) contacts the intermediate frame (4), a fixed shaft (52) is movably arranged on the fixed inner frame (2), and the fixed shaft (52) movably penetrates the intermediate frame (4) and the buffer support (51) in sequence; The second support assembly (6) comprises a cushion block (61) slidably arranged on the bottom surface of the fixed inner frame (2), the cushion block (61) is in contact with the intermediate frame (4), and a spring support (62) is arranged at one end of the intermediate frame (4) close to the cushion block (61); The fixed outer frame (1) is a U-shaped structure; The fixed inner frame (2) is a U-shaped structure, the U-shaped opening direction of the fixed inner frame (2) is the same as the U-shaped opening direction of the fixed outer frame (1), and the fixed inner frame (2) is slidably arranged in the U-shaped opening of the fixed outer frame (1).

2. The electric vehicle frame compressive strength testing device according to claim 1, characterized in that: The pressure device (3) comprises: A slide groove (32), the slide groove (32) being arranged on a U-shaped opening of the fixed outer frame (1); A base (31), the base (31) being slidably disposed on the slide groove (32); A press machine (33), the press machine (33) is arranged on the base (31), and the position of the base (31) corresponds to the position of the intermediate frame (4) in the upper and lower directions.

3. The electric vehicle frame compressive strength testing device according to claim 1, characterized in that: The intermediate frame (4) is a rectangular frame structure. A cylinder seat (41) is arranged in the intermediate frame (4). Two opposite inner walls of the cylinder seat (41) are respectively embedded with locking cylinders (42). The piston rod of the locking cylinder (42) movably penetrates the other two opposite ends of the cylinder seat (41). An insertion shaft (43) is arranged on the piston rod of the locking cylinder (42). A plurality of insertion holes (431) corresponding to the insertion shafts (43) are arranged on the inner wall of the U-shaped opening of the fixed outer frame (1). The insertion shafts (43) are respectively movably inserted into the insertion holes (431) at corresponding positions.

4. The electric vehicle frame compressive strength testing device according to claim 1, characterized in that: The buffer support (51) is connected to the bottom surface of the U-shaped opening of the fixed inner frame (2) through a plurality of compression springs (511); a plurality of brackets (512) are vertically arranged on a side of the buffer support (51) away from the compression springs (511); a fixed circular shaft (513) is horizontally arranged on the bracket (512); a semicircular groove (44) corresponding to the position of the fixed circular shaft (513) is arranged on the intermediate frame body (4); the fixed circular shaft (513) is rotatably arranged in the semicircular groove (44); a plurality of slots (45) corresponding to the brackets (512) are arranged on the semicircular groove (44); and the brackets (512) are respectively located in the slots (45) at corresponding positions.

5. The electric vehicle frame compressive strength testing device according to claim 4, characterized in that: The fixed shaft (52) movably penetrates the intermediate frame (4) and the fixed circular shaft (513) in sequence, and both ends of the U-shaped opening of the fixed inner frame (2) are respectively provided with mounting seats (521) corresponding to both ends of the length direction of the fixed shaft (52), and both ends of the length direction of the fixed shaft (52) are movably inserted into the mounting seats (521) at corresponding positions, and both ends of the U-shaped opening of the fixed outer frame (1) are also provided with through grooves (522) corresponding to the mounting seats (521).

6. The electric vehicle frame compressive strength testing device according to claim 3, characterized in that: A support seat (21) is arranged on the bottom surface of the U-shaped opening of the fixed inner frame (2), a cylinder seat (41) is arranged on the support seat (21), a pushing cylinder (22) is embedded on the inner wall of the support seat (21) away from the end of the buffer support (51), and a cushion block (61) is arranged on the piston rod of the pushing cylinder (22).

7. The electric vehicle frame compressive strength testing device according to claim 1, characterized in that: The spring support (62) comprises: A semicircular ring-shaped support cover (621), wherein one end of the arc-shaped opening of the semicircular ring-shaped support cover (621) is hingedly connected to one end of the intermediate frame (4) close to the cushion block (61); A return spring group (622), wherein a plurality of return spring groups (622) are provided, and the plurality of return spring groups (622) are arranged in parallel and spaced apart on the inner wall of the arc-shaped opening of the semicircular ring support cover (621); An intermediate shaft (623) is arranged in the arc-shaped opening of the semicircular ring-shaped support cover (621), and the outer peripheral wall of the intermediate shaft (623) is connected to the return spring group (622).

8. The electric vehicle frame compressive strength testing device according to claim 7, characterized in that: The return spring group (622) comprises a plurality of return springs (624) uniformly distributed along the circumference of the intermediate shaft (623), and both ends of the return springs (624) in the length direction are respectively connected to the inner wall of the arc-shaped opening of the semicircular ring support cover (621) and the outer peripheral wall of the intermediate shaft (623).

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