Multifunctional trolley

Abstract

The invention relates to the technical field of trolleys, and discloses a multifunctional trolley which comprises a main body, two supporting frames are rotationally connected to the side wall of the main body, a scissor-type connecting rod is rotationally connected to the back faces of the two supporting frames, and a connecting rod is rotationally connected to the end, away from the supporting frames, of the scissor-type connecting rod. The ends, away from the scissor-type connecting rods, of the connecting rods are rotationally connected with the side walls of the supporting frames, and spring frames are rotationally connected to the front face and the back face of the body. When an auxiliary plate slides upwards, a first spring rod is driven to synchronously move upwards, the first spring rod slides in a heart-shaped groove when moving upwards, and when the first spring rod slides to the corner of the heart-shaped groove, the first spring rod can be fixed when the device is folded and stored; the situation that the trolley is unfolded in the moving process after being folded or under the influence of the outside world is reduced, and then the stability of the device in the folded state can be enhanced.

Description

Technical Field

[0001] The invention relates to the technical field of trolleys, in particular to a multifunctional trolley. Background Art

[0002] In recent years, with the development of materials science, electronic technology and intelligent technology, the design and production level of multifunctional trolleys has been significantly improved. For example, the application of wear-resistant materials, the introduction of electric drive systems and the integration of intelligent control technology have made the performance of multifunctional trolleys more superior; Generally, the trolley is folded for the convenience of carrying. Generally, the existing foldable trolleys have no structure to fix the folded trolley after folding, which easily causes the trolley to unfold during the process of carrying after folding, affecting the folding stability and the folding effect after folding. Summary of the invention

[0003] The object of the present invention is to provide a multifunctional trolley to solve the problems raised in the above background technology.

[0004] In order to solve the above technical problems, the present invention is achieved through the following technical solutions: The present invention is a multifunctional trolley, comprising a main body, the side wall of the main body is rotatably connected to two support frames, the backs of the two support frames are rotatably connected to scissor-type connecting rods, one end of the scissor-type connecting rod away from the support frame is rotatably connected to a connecting rod, one end of the connecting rod away from the scissor-type connecting rod is rotatably connected to the side wall of the support frame, the front and back of the main body are rotatably connected to spring frames, and further comprising; The auxiliary mechanism includes four L-plates fixedly connected to the bottom of the main body, the four L-plates are grouped in pairs and symmetrically distributed with a spring frame as the center, a square plate is slidably connected between the two L-plates, L-rods are arranged on the front and back of the square plate, one end of the L-rod away from the square plate is rotatably connected to the side wall of the main body, a hollow rack is fixedly connected to the side of the square plate close to the spring frame, and rectangular grooves are opened on the front and back of the hollow rack; The sliding mechanism includes an arc-shaped elastic plate rotatably connected to the left inner wall of the arc-shaped elastic plate, one end of the two arc-shaped elastic plates close to the square plate is rotatably connected to an intermediate plate, the side of the intermediate plate away from the arc-shaped elastic plate is rotatably connected to a C-row frame, and the inside of the C-row frame is rotatably connected to an auxiliary plate.

[0005] Furthermore, a square groove is provided on the top of the hollow rack, and a tilting block is fixedly connected to the bottom inner wall of the hollow rack; Among them, one side of the four L-rods close to the support frame is fixedly connected to the side wall of the support frame, and the front and back sides of the L-rods are slidably connected to two of the L-rods.

[0006] Furthermore, the front and back sides of the auxiliary plate are fixedly connected with spring rod 2, the end of spring rod 2 away from the auxiliary plate contacts the inner wall of the hollow rack, the bottom of the auxiliary plate is inclined, the bottom of the auxiliary plate contacts the inclined block, and the top of the auxiliary plate is fixedly connected with spring rod 1.

[0007] Furthermore, a rotating mechanism is provided at the bottom of the main body, and the rotating mechanism includes a hollow frame slidably connected between the other two L plates, the front and back sides of the hollow frame are slidably connected to the side of the other two L rods away from the support frame, a heart-shaped groove is provided on the top inner wall of the hollow frame, and the side of the hollow frame close to the square plate is open, and the top inner wall of the hollow frame is rotatably connected to two gears, a cam plate is fixedly connected to the bottom of the gear, and an insertion rod is fixedly connected to the side of the cam plate away from the gear, and the insertion rod and the cam plate are eccentrically arranged.

[0008] Furthermore, a limiting mechanism is arranged inside the hollow frame, and the limiting mechanism includes two limiting plates fixedly connected to the inner wall of the bottom of the hollow frame, a sliding block is slidably connected to the side of the limiting plate away from the spring frame, a T-shaped plate is fixedly connected to the top of the sliding block, the top of the T-shaped plate is open, and a semicircular plate is fixedly connected to the end of the limiting plate away from the square plate.

[0009] Furthermore, a C-shaped groove is provided on the top of the semicircular plate; The insertion rod is slidably connected inside the opening of the T-shaped plate.

[0010] Furthermore, the side wall of the limiting plate is provided with a swinging mechanism, which includes a straight groove plate rotatably connected to the top of the semicircular plate, the side wall of the straight groove plate is rotatably connected to a movable plate, and the end of the movable plate away from the straight groove plate is rotatably connected to the side wall of the sliding block, and the side wall of the straight groove plate is provided with a through groove, and the interior of the through groove is slidably connected to a limiting shaft, and the bottom of the limiting shaft passes through the bottom of the through groove and is slidably connected to the inside of the C-shaped groove.

[0011] Furthermore, an opening and closing mechanism is provided at the top of the limiting shaft, and the opening and closing mechanism includes two arc plates rotatably connected to the top of the limiting shaft, one end of the arc plate away from the limiting shaft is rotatably connected to a rotating frame, the two rotating frames are rotatably connected to the top outer wall of the straight groove plate on one side close to the straight groove plate, and the side of the rotating frame away from the arc plate is fixedly connected to a telescopic plate.

[0012] The present invention has the following beneficial effects: 1. In the present invention, when the device needs to be folded and folded, the main body will be relatively folded with the middle part of the main body as the center to get close to and compress the spring frame. When the main body is folded, the four L-rods on the support frame will push the hollow frame and the square plate respectively. At this time, the hollow frame and the square plate will form a horizontal state. Then, when the main body continues to be folded, the hollow rack on the square plate will pass through the opening of the side wall of the hollow frame and slide into the interior of the hollow frame. Then, when the main body continues to be folded, the hollow rack will slide into the interior of the hollow frame. When the hollow rack slides, it will mesh with the two gears and drive the gears to fold. When the gears rotate, they will drive the cam plate to rotate. When the cam plate rotates, it will squeeze the arc-shaped elastic plate. After being squeezed, the arc-shaped elastic plate will push the middle plate to slide inside the hollow rack. When the middle plate slides, it will push the C-row frame and the auxiliary plate to slide. When the auxiliary plate slides, the inclined shape of the bottom will slide upward under the guidance of the inclined block. When the auxiliary plate slides upward, it will drive the spring rod 1 to move upward synchronously. When the spring rod 1 moves upward, it will slide inside the heart-shaped groove. When the spring rod 1 slides to the corner on the heart-shaped groove, it can be fixed when the device is folded and stored, reducing the process of the trolley moving after folding or the unfolding under the influence of the outside world, thereby enhancing the stability of the device in the folded state.

[0013] 2. According to the present invention, when the sliding of the auxiliary plate drives the spring rod 1 to slide inside the heart-shaped groove, the spring rod 1 can slide to the corner of the heart-shaped groove under the guidance of the heart-shaped groove to quickly fix the folding of the device. When the device needs to be unfolded later, it is only necessary to push and fold the main body again. At this time, the spring rod 1 will be separated from the corner of the heart-shaped groove. At the same time, the folded main body will be quickly reset under the elasticity of the two spring frames. In this way, the device can be quickly folded and unfolded when it is folded, and the shopping cart can be quickly converted between folding and unfolding, thereby reducing the difficulty of use for users, improving the overall experience of users, and allowing users to easily complete folding and unfolding while saving some time and energy.

[0014] 3. In the present invention, when the gear drives the cam plate to rotate, the rotation of the cam plate will drive the insertion rod to rotate eccentrically, and when the insertion rod is rotating eccentrically, it will drive the T-shaped plate and the sliding block to slide on the limit plate, and when the sliding block slides, it will drive the straight groove plate to rotate through the movable plate, and when the straight groove plate rotates, it drives the limit shaft to slide forward in the through groove on the straight groove plate along the guidance of the C-shaped groove, and when the limit shaft slides forward, it will drive the two arc plates to squeeze the rotating frame and the telescopic plate, and at this time, the telescopic plate will gradually close as the straight groove plate rotates under the push of the arc plate, and when the limit shaft slides to the front end of the C-shaped groove, the two closed telescopic plates will be stuck between the two teeth on the hollow rack, and then when the device needs to be unfolded, the hollow rack When the hollow rack is folded, the telescopic plate is stuck between the two teeth. When the hollow rack slides backward, the telescopic plate will gradually separate from the teeth on the hollow rack when the hollow rack slides to reset, and the reset speed of the hollow rack will be intermittently blocked between the two teeth. At this time, the intermittent blocking of the teeth on the hollow rack by the telescopic plate can reduce the situation where the device is unfolded too fast due to the elasticity of the two spring frames when the device is unfolded, so as to avoid the situation where the device is unfolded too fast, resulting in collision or accidental injury to the user during the unfolding process, thereby further improving the stability of the device when folding and unfolding.

[0015] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for describing the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0017] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic diagram of the overall partial cross-sectional structure of the present invention; Figure 3 For the present invention Figure 2 Enlarged view of point A in the middle; Figure 4 It is a schematic diagram of the auxiliary mechanism of the present invention; Figure 5 For the present invention Figure 4 Enlarged view of point B in the middle; Figure 6 It is a schematic diagram of the rotating mechanism of the present invention; Figure 7 It is a schematic diagram of the swing mechanism of the present invention; Figure 8 It is a schematic diagram of the opening and closing mechanism of the present invention.

[0018] In the accompanying drawings, the components represented by the reference numerals are listed as follows: In the figure: 1. main body; 101. support frame; 102. scissor-type connecting rod; 103. connecting rod; 104. spring frame; 2. auxiliary mechanism; 201. L plate; 202. square plate; 203. L rod; 204. hollow rack; 205. rectangular groove; 206. square groove; 3. sliding mechanism; 301. arc elastic plate; 302. middle plate; 303. C row frame; 304. auxiliary plate; 305. spring rod 1; 4. Rotating mechanism; 401. Hollow frame; 402. Heart-shaped groove; 403. Gear; 404. Cam plate; 5. Limiting mechanism; 501. Limiting plate; 502. Sliding block; 503. T-shaped plate; 504. Semicircular plate; 505. C-shaped groove; 6. Swinging mechanism; 601. Straight groove plate; 602. Movable plate; 603. Limiting shaft; 7. Opening and closing mechanism; 701. Arc plate; 702. Rotating frame; 703. Telescopic plate. DETAILED DESCRIPTION

[0019] 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.

[0020] See also Figure 1 - Figure 8 As shown, the present invention is a multifunctional trolley, comprising a main body 1, the side wall of the main body 1 is rotatably connected to two support frames 101, the backs of the two support frames 101 are rotatably connected to scissor-type connecting rods 102, one end of the scissor-type connecting rod 102 away from the support frame 101 is rotatably connected to a connecting rod 103, one end of the connecting rod 103 away from the scissor-type connecting rod 102 is rotatably connected to the side wall of the support frame 101, the front and back of the main body 1 are both rotatably connected to a spring frame 104, and further comprising; The auxiliary mechanism 2 includes four L plates 201 fixedly connected to the bottom of the main body 1. The four L plates 201 are arranged in pairs and are symmetrically distributed with a spring frame 104 as the center. A square plate 202 is slidably connected between the two L plates 201. L rods 203 are arranged on the front and back of the square plate 202. One end of the L rod 203 away from the square plate 202 is rotatably connected to the side wall of the main body 1. A hollow rack 204 is fixedly connected to the side of the square plate 202 close to the spring frame 104. A rectangular groove 205 is provided on the front and back of the hollow rack 204. The sliding mechanism 3 includes an arc-shaped elastic plate 301 rotatably connected to the inner wall on the left side of the arc-shaped elastic plate 301, one end of the two arc-shaped elastic plates 301 close to the square plate 202 is rotatably connected to the middle plate 302, and the side of the middle plate 302 away from the arc-shaped elastic plate 301 is rotatably connected to the C-row frame 303, and the inside of the C-row frame 303 is rotatably connected to the auxiliary plate 304. When the device needs to be retracted and folded, the main body 1 will be relatively folded with the middle part of the main body 1 as the center and the spring frame 104 will be compressed. When the main body 1 is folded, the four L rods 203 on the support frame 101 will push the hollow frame 401 and the square plate 202 respectively.

[0021] A square groove 206 is formed on the top of the hollow rack 204, and a tilting block is fixedly connected to the inner wall of the bottom of the hollow rack 204; Among them, the four L rods 203 are fixedly connected to the side wall of the support frame 101 close to the side of the support frame 101, and the front and back sides of the L rods 203 are slidably connected to two of the L rods 203. Then, when the main body 1 continues to be folded, the hollow rack 204 on the square plate 202 will pass through the opening of the side wall of the hollow frame 401 and slide into the interior of the hollow frame 401.

[0022] The front and back sides of the auxiliary plate 304 are fixedly connected with spring rod 2, and the end of the spring rod 2 away from the auxiliary plate 304 contacts the inner wall of the hollow rack 204. The bottom of the auxiliary plate 304 is inclined, and the bottom of the auxiliary plate 304 contacts the inclined block. The top of the auxiliary plate 304 is fixedly connected with spring rod 1 305. After the arc-shaped elastic plate 301 is squeezed, it will push the middle plate 302 to slide inside the hollow rack 204. When the middle plate 302 slides, it will push the C-row frame 303 and the auxiliary plate 304 to slide.

[0023] A rotating mechanism 4 is provided at the bottom of the main body 1, and the rotating mechanism 4 includes a hollow frame 401 slidably connected between the other two L plates 201, the front and back sides of the hollow frame 401 are slidably connected to the side of the other two L rods 203 away from the support frame 101, and a heart-shaped groove 402 is provided on the top inner wall of the hollow frame 401, and the side of the hollow frame 401 close to the square plate 202 is open, and the top inner wall of the hollow frame 401 is rotatably connected to two gears 403, and a cam plate 404 is fixedly connected to the bottom of the gear 403, and a plug rod is fixedly connected to the side of the cam plate 404 away from the gear 403, and the plug rod and the cam plate 404 are eccentrically arranged. When the gear 403 drives the cam plate 404 to rotate, the rotation of the cam plate 404 will drive the plug rod to rotate eccentrically.

[0024] A limiting mechanism 5 is arranged inside the hollow frame 401, and the limiting mechanism 5 includes two limiting plates 501 fixedly connected to the inner wall of the bottom of the hollow frame 401, and a sliding block 502 is slidably connected to the side of the limiting plate 501 away from the spring frame 104, and a T-shaped plate 503 is fixedly connected to the top of the sliding block 502, and the top of the T-shaped plate 503 is open, and a semicircular plate 504 is fixedly connected to the end of the limiting plate 501 away from the square plate 202, and the insertion rod will drive the T-shaped plate 503 and the sliding block 502 to slide on the limiting plate 501 when the eccentric rotation is performed.

[0025] A C-shaped groove 505 is formed on the top of the semicircular plate 504; The insertion rod is slidably connected to the inside of the opening of the T-shaped plate 503 , and when the sliding block 502 slides, it drives the straight groove plate 601 to rotate through the movable plate 602 .

[0026] The side wall of the limiting plate 501 is provided with a swing mechanism 6, which includes a straight groove plate 601 rotatably connected to the top of the semicircular plate 504, and the side wall of the straight groove plate 601 is rotatably connected with a movable plate 602. The end of the movable plate 602 away from the straight groove plate 601 is rotatably connected to the side wall of the sliding block 502. A through groove is opened on the side wall of the straight groove plate 601, and the internal sliding connection of the through groove is provided with a limiting shaft 603. The bottom of the limiting shaft 603 penetrates to the bottom of the through groove and is slidably connected to the inside of the C-shaped groove 505. When the sliding block 502 slides, it will drive the straight groove plate 601 to rotate through the movable plate 602. When the straight groove plate 601 rotates, it drives the limiting shaft 603 to slide forward in the through groove on the straight groove plate 601 along the guidance of the C-shaped groove 505.

[0027] The top of the limiting shaft 603 is provided with an opening and closing mechanism 7, which includes two arc plates 701 rotatably connected to the top of the limiting shaft 603, one end of the arc plate 701 away from the limiting shaft 603 is rotatably connected to a rotating frame 702, the two rotating frames 702 are rotatably connected to the top outer wall of the straight groove plate 601 on one side close to the straight groove plate 601, and the rotating frame 702 is fixedly connected to the telescopic plate 703 on the side away from the arc plate 701. When the limiting shaft 603 slides forward, the two arc plates 701 will be driven to squeeze the rotating frame 702 and the telescopic plate 703. At this time, the telescopic plate 703 will be gradually closed as the straight groove plate 601 rotates under the push of the arc plate 701. When the limiting shaft 603 slides to the front end of the C-shaped groove 505, the two closed telescopic plates 703 will be stuck between the two teeth on the hollow rack 204.

[0028] When in use, first open the main body 1 and the support frame 101, then place the item on the main body 1 and push it. When the device needs to be folded and folded, the main body 1 will fold relatively with the middle part of the main body 1 as the center, close to and compress the spring frame 104. When the main body 1 is folded, the four L rods 203 on the support frame 101 will push the hollow frame 401 and the square plate 202 respectively. At this time, the hollow frame 401 and the square plate 202 will form a horizontal state. Then, when the main body 1 continues to be folded, the hollow rack 204 on the square plate 202 will pass through the opening of the side wall of the hollow frame 401 and slide into the interior of the hollow frame 401. Then, when the main body 1 continues to be folded, the hollow rack 204 will slide toward the interior of the hollow frame 401. When the hollow rack 204 slides, it will mesh with the two gears 403 and drive the gear 403 to fold. When the gear 403 rotates, it will drive the cam plate 404 to rotate. When the cam plate 404 rotates, it will squeeze the arc-shaped elastic plate 301. After being squeezed, the arc-shaped elastic plate 301 will push the middle plate 302 to slide inside the hollow rack 204. When the middle plate 302 slides, it will push the C-row frame 303 and the auxiliary plate 304 to slide. When the auxiliary plate 304 slides, the inclined shape of the bottom will slide upward under the guidance of the inclined block. When the auxiliary plate 304 slides upward, it will drive the spring rod 1 305 to move upward synchronously. When the spring rod 1 305 moves upward, it will slide inside the heart-shaped groove 402. When the spring rod 1 305 slides to the corner on the heart-shaped groove 402, it can be fixed when the device is folded and stored, reducing the process of the trolley moving after folding or the unfolding under the influence of the outside world, thereby enhancing the stability of the device in the folded state.

[0029] When the sliding of the auxiliary plate 304 drives the spring rod 1 305 to slide inside the heart-shaped groove 402, the spring rod 1 305 can slide to the corner of the heart-shaped groove 402 under the guidance of the heart-shaped groove 402 to quickly fix the folding of the device. When the device needs to be unfolded later, it only needs to push and fold the main body 1 again. At this time, the spring rod 1 305 will be disengaged from the corner of the heart-shaped groove 402. At the same time, the folded main body 1 will be quickly reset under the elasticity of the two spring frames 104. In this way, the device can be quickly folded and unfolded when folded, and the shopping cart can be quickly converted between folding and unfolding, thereby reducing the user's difficulty of use and improving the user's overall experience. It allows the user to easily complete folding and unfolding while saving some time and energy.

[0030] When the gear 403 drives the cam plate 404 to rotate, the rotation of the cam plate 404 will drive the plunger to rotate eccentrically. When the plunger rotates eccentrically, it will drive the T-shaped plate 503 and the sliding block 502 to slide on the limiting plate 501. When the sliding block 502 slides, it will drive the straight groove plate 601 to rotate through the movable plate 602. When the straight groove plate 601 rotates, it drives the limiting shaft 603 to slide forward in the through groove on the straight groove plate 601 along the guidance of the C-shaped groove 505. When the limiting shaft 603 slides forward, it will drive the two arc plates 701 to squeeze the rotating frame 702 and the telescopic plate 703. At this time, the telescopic plate 703 will gradually close as the straight groove plate 601 rotates under the push of the arc plate 701. When the limiting shaft 603 slides to the front end of the C-shaped groove 505, the two closed telescopic plates 703 will be stuck between the two teeth on the hollow rack 204. Then, when it is needed When the device is unfolded, the hollow rack 204 will slide outward inside the hollow frame 401 to reset. When the hollow rack 204 slides outward, it will drive the gear 403 to rotate in the opposite direction to reset. Since the folded telescopic plate 703 is stuck between the two teeth, when the hollow rack 204 slides backward, the telescopic plate 703 will gradually separate from the teeth on the hollow rack 204 when the hollow rack 204 slides to reset, and intermittently block the reset speed of the hollow rack 204 between the two teeth. At this time, the intermittent blocking of the teeth on the hollow rack 204 by the telescopic plate 703 can reduce the situation where the device is unfolded too fast due to the elasticity of the two spring frames 104 when the device is unfolded, so as to avoid the situation where the device is unfolded too fast, resulting in collision or accidental injury to the user during the unfolding process, thereby further improving the stability of the device when folding and unfolding.

[0031] The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A multifunctional trolley, comprising a main body (1), the side wall of the main body (1) being rotatably connected to two support frames (101), the backs of the two support frames (101) being rotatably connected to scissor-type connecting rods (102), one end of the scissor-type connecting rod (102) away from the support frame (101) being rotatably connected to a connecting rod (103), one end of the connecting rod (103) away from the scissor-type connecting rod (102) being rotatably connected to the side wall of the support frame (101), the front and back of the main body (1) being rotatably connected to spring frames (104), characterized in that: Also includes; An auxiliary mechanism (2), the auxiliary mechanism (2) comprising four L-plates (201) fixedly connected to the bottom of the main body (1), the four L-plates (201) being arranged in pairs and symmetrically distributed around a spring frame (104), a square plate (202) being slidably connected between two of the L-plates (201), an L-rod (203) being provided on the front and back sides of the square plate (202), an end of the L-rod (203) away from the square plate (202) being rotatably connected to a side wall of the main body (1), a hollow rack (204) being fixedly connected to a side of the square plate (202) close to the spring frame (104), and a rectangular groove (205) being provided on the front and back sides of the hollow rack (204); A sliding mechanism (3), the sliding mechanism (3) comprising an arc-shaped elastic plate (301) rotatably connected to the left inner wall of the arc-shaped elastic plate (301), one end of the two arc-shaped elastic plates (301) close to the square plate (202) being rotatably connected to an intermediate plate (302), a side of the intermediate plate (302) away from the arc-shaped elastic plate (301) being rotatably connected to a C-row frame (303), and an auxiliary plate (304) being rotatably connected inside the C-row frame (303).

2. A multifunctional trolley according to claim 1, characterized in that: A square groove (206) is provided on the top of the hollow rack (204), and a tilting block is fixedly connected to the inner wall of the bottom of the hollow rack (204); The four L-rods (203) are fixedly connected to the side wall of the support frame (101) on one side close to the support frame (101), and the front and back sides of the L-rods (203) are slidably connected to two of the L-rods (203).

3. A multifunctional trolley according to claim 2, characterized in that: The front and back sides of the auxiliary plate (304) are both fixedly connected to spring rod 2, one end of the spring rod 2 away from the auxiliary plate (304) contacts the inner wall of the hollow rack (204), the bottom of the auxiliary plate (304) is inclined, the bottom of the auxiliary plate (304) contacts the inclined block, and the top of the auxiliary plate (304) is fixedly connected to spring rod 1 (305).

4. A multifunctional trolley according to claim 3, characterized in that: A rotating mechanism (4) is provided at the bottom of the main body (1), the rotating mechanism (4) comprising a hollow frame (401) slidably connected between the other two L-plates (201), the front and back sides of the hollow frame (401) being slidably connected to the other two L-rods (203) on the side away from the support frame (101), a heart-shaped groove (402) is provided on the top inner wall of the hollow frame (401), the side of the hollow frame (401) close to the square plate (202) is open, the top inner wall of the hollow frame (401) is rotatably connected to two gears (403), the bottom of the gear (403) is fixedly connected to a cam plate (404), the side of the cam plate (404) away from the gear (403) is fixedly connected to an insertion rod, and the insertion rod and the cam plate (404) are eccentrically arranged.

5. A multifunctional trolley according to claim 4, characterized in that: A limiting mechanism (5) is arranged inside the hollow frame (401), the limiting mechanism (5) comprising two limiting plates (501) fixedly connected to the inner wall of the bottom of the hollow frame (401), a side of the limiting plate (501) away from the spring frame (104) being slidably connected to a sliding block (502), a top of the sliding block (502) being fixedly connected to a T-shaped plate (503), the top of the T-shaped plate (503) being open, and an end of the limiting plate (501) away from the square plate (202) being fixedly connected to a semicircular plate (504).

6. A multifunctional trolley according to claim 5, characterized in that: A C-shaped groove (505) is formed on the top of the semicircular plate (504); The insertion rod is slidably connected to the inside of the opening of the T-shaped plate (503).

7. A multifunctional trolley according to claim 6, characterized in that: The side wall of the limit plate (501) is provided with a swing mechanism (6), the swing mechanism (6) comprising a straight groove plate (601) rotatably connected to the top of the semicircular plate (504), the side wall of the straight groove plate (601) is rotatably connected to a movable plate (602), one end of the movable plate (602) away from the straight groove plate (601) is rotatably connected to the side wall of the sliding block (502), the side wall of the straight groove plate (601) is provided with a through groove, the interior of the through groove is slidably connected to a limit shaft (603), the bottom of the limit shaft (603) passes through the bottom of the through groove and is slidably connected to the inside of the C-shaped groove (505).

8. A multifunctional trolley according to claim 7, characterized in that: An opening and closing mechanism (7) is arranged at the top of the limiting shaft (603), and the opening and closing mechanism (7) comprises two arc-shaped plates (701) rotatably connected to the top of the limiting shaft (603), one end of the arc-shaped plate (701) away from the limiting shaft (603) is rotatably connected to a rotating frame (702), one side of the two rotating frames (702) close to the straight groove plate (601) is rotatably connected to the top outer wall of the straight groove plate (601), and one side of the rotating frame (702) away from the arc-shaped plate (701) is fixedly connected to a telescopic plate (703).

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