Space-saving AGV trolley for spandex production

Abstract

The invention relates to the technical field of spandex production equipment, in particular to a space-saving AGV trolley for spandex production, and solves the problems that in the prior art, an AGV trolley occupies too large space and is insufficient in flexibility. The space-saving AGV trolley comprises a trolley body, an elastic supporting frame is arranged at the top of the trolley body, a first servo motor is arranged on the elastic supporting frame, and a connecting base is arranged above the first servo motor; a string rod is connected to the connecting seat in a swinging manner and is in transmission connection with a first servo motor; and a vibrator is arranged on the elastic support frame. The automatic feeding and discharging device has the beneficial effects that the string rod swings by different angles to achieve feeding and discharging of spandex products, after an AGV trolley is positioned near a target production line, the string rod swings downwards to correspond to the discharging position of the production line, and after the production line pushes the products to the string rod, the string rod swings upwards to enable the products to be kept on the string rod; when the AGV runs to a discharging position, the string rod swings to an inclined downward state, so that the spandex product slides into a target container from the string rod; and the occupied road space is reduced in an upward swinging material receiving mode.

Description

Technical Field

[0001] The present invention relates to the technical field of spandex production equipment, and particularly to an AGV cart for spandex production that saves space. Background Art

[0002] Automated Guided Vehicle (AGV) plays an important role in modern factory logistics transportation. In order to improve the positioning accuracy and autonomous navigation ability of AGV, a common technical solution is to install cameras and various sensors on the AGV cart, and preset an environmental image database around the path that the vehicle intends to travel in the on-vehicle computer. During the driving process, the AGV dynamically obtains real-time environmental image information through the camera and compares it with the preset images in the database, so as to accurately determine its current position and make decisions on the next driving path accordingly. When applying such AGVs to the material transportation of the spandex production line, its typical working process is as follows: After the AGV cart drives to the downstream end of the production line and is accurately aligned, the production line directly discharges the formed spandex roll products onto the bearing rod extended by the AGV cart; Subsequently, the AGV cart retracts the bearing rod and transports the product to the designated position.

[0003] In the prior art, there are already various AGV cart structures for material handling. For example, the Chinese patent document with the publication number CN112937728A discloses an automatic loading and unloading handling cart with an anti-overturning function. This cart mainly includes a telescopic fork, an AGV cart body, and a clamping device. Among them, the telescopic fork is composed of a base, a driving device, and a fork. The base is fixed to the upper part of the AGV cart body by bolts, and the driving device drives the fork to perform one-way or two-way telescopic movement to realize the picking and placing of stacked materials; The clamping device is installed at the bottom of the AGV cart to stabilize the stacked materials. However, when applying such AGV carts equipped with telescopic fork structures to the spandex production scenario, there are significant limitations: Excessive space occupation: The telescopic fork mechanism needs to occupy a large lateral space in the extended state, the width direction of the AGV cart is large, and its fixed base also continuously occupies the effective area of the AGV platform in the non-working state. This not only increases the size of the AGV itself, but also requires more generous space to be reserved on its operation and passage paths. In the environment of a spandex production workshop where the space is usually limited and the equipment layout is compact, it causes a waste of valuable production space.

[0004] Large and bulky structure: In order to realize the horizontal telescopic movement of the fork, driving devices such as motors, hydraulic cylinders, and chain / gear transmission mechanisms need to be set on the AGV cart, and supporting structures such as bases and guide rails. The driving devices and supporting structures often require large sizes and high strengths, resulting in a large volume and a significant increase in weight of the entire telescopic fork mechanism. This makes the AGV cart equipped with this mechanism become very bulky as a whole. Summary of the Invention

[0005] The present invention provides an AGV cart for spandex production that saves space, solving the problems of excessive space occupation and insufficient flexibility of AGV carts in the prior art.

[0006] The technical solution of the present invention is realized as follows: An AGV cart for spandex production that saves space, including a vehicle body, a resilient support frame is provided on the top of the vehicle body, a first servo motor is provided on the resilient support frame, a connecting seat is provided above the first servo motor, a string rod is swingably connected to the connecting seat, and the string rod is in transmission connection with the first servo motor; a vibrator is provided on the resilient support frame. The string rod swings at different angles on the connecting seat to realize the feeding, discharging and storage of spandex products on the AGV cart. Specifically, when the string rod is horizontally arranged, the string rod corresponds to the discharging position of the production line, and the spandex products on the production line are pushed onto the string rod to realize the feeding of spandex products on the AGV cart; when the string rod is vertically arranged, the spandex products are kept on the string rod to realize the storage of spandex products on the AGV cart; when the string rod is in a position inclined downward, the vibrator drives the resilient support frame to vibrate, and the spandex products on the string rod slide off to realize the discharging of spandex products on the AGV cart; by the method of swinging upward to collect materials, the occupation of road space is reduced, and at the same time, the transportation stability of products is improved.

[0007] The resilient support frame includes a U-shaped resilient plate arranged horizontally. The lower side plate of the U-shaped resilient plate is connected to the vehicle body, and the first servo motor and the vibrator are arranged on the upper side plate of the U-shaped resilient plate. The vibrator can drive the upper side plate of the U-shaped resilient plate to vibrate, so that the upper side plate can drive the first servo motor and the string rod on the first servo motor to vibrate, thereby facilitating the sliding off of the spandex products on the string rod.

[0008] A support mechanism for providing support to the U-shaped resilient plate is provided on the resilient support frame; the support mechanism is connected to the lower side plate of the U-shaped resilient plate, and the support structure is located between the upper side plate and the lower side plate of the U-shaped resilient plate. When the spandex products are fed or stored on the AGV cart, the support mechanism provides support to the U-shaped resilient plate, so that the upper side plate of the U-shaped resilient plate remains stable, avoiding the shaking of the upper side plate of the U-shaped resilient plate, and thus ensuring the stability of the spandex products on the AGV cart; when the spandex products are discharged from the AGV cart, the support mechanism cancels the support for the U-shaped resilient plate, so that the vibrator can drive the U-shaped resilient plate to vibrate smoothly, facilitating the switching of the state of the resilient support frame.

[0009] The support mechanism includes an elliptical cylinder. The two ends of the elliptical cylinder are connected with first rotating shafts. A bearing seat is provided on the lower side plate of the U-shaped elastic plate. The first rotating shafts are rotationally connected with the bearing seat. A second servo motor is provided outside the bearing seat, and the output end of the second servo motor is connected with the first rotating shaft. The second servo motor can drive the elliptical cylinder to rotate through the first rotating shaft, thereby realizing the switching of the state of the elliptical cylinder, and further realizing the switching of the support state of the U-shaped elastic plate, which is convenient for loading and unloading spandex products.

[0010] The cross-sectional shape of the elliptical cylinder is elliptical, and the length of the major axis of the ellipse is greater than or equal to the distance between the upper side plate and the lower side plate of the U-shaped elastic plate. When the elliptical cylinder rotates to the state where the major axis of the ellipse is in the vertical state, the elliptical cylinder provides support for the upper side plate of the U-shaped elastic plate, restricting the elastic deformation of the U-shaped elastic plate, so that the U-shaped elastic plate can provide stable support for the string rod; when the elliptical cylinder rotates to the state where the major axis of the ellipse is in the horizontal state, the elliptical cylinder cancels the support for the upper side plate of the U-shaped elastic plate, enabling the U-shaped elastic plate to undergo elastic deformation. At this time, the vibrator can drive the U-shaped elastic plate to vibrate, facilitating the unloading of spandex products.

[0011] The output end of the first servo motor is connected with a worm. A worm gear is rotationally connected to the connecting seat. The worm is meshed with the worm gear. The lower end of the string rod is connected to the outer circumferential surface of the worm gear. The first servo motor can drive the worm to rotate, and drive the string rod to swing on the connecting seat through the meshing of the worm and the worm gear, realizing the adjustment of the position state of the string rod.

[0012] A stop block is provided at the lower end of the string rod, and the stop block is located outside the connecting seat. After the spandex product is threaded onto the string rod, the stop block provides support for the spandex product, preventing the spandex product from directly contacting the connecting seat, and ensuring the stability of the spandex product on the string rod when the string rod swings.

[0013] A buffer assembly is provided at the upper end of the string rod. During the process of the string rod swinging to the position corresponding to the production line unloading position, the buffer assembly absorbs the impact force generated between the end of the string rod and the production line, improving the safety of the string rod during use, and reducing the accuracy requirement for the AGV cart to park at the production line unloading position. That is, the distance between the AGV cart and the production line unloading end can fluctuate within a large range when the AGV cart parks, reducing the manufacturing difficulty of the AGV cart.

[0014] The buffer assembly includes a slider. The slider is slidably matched with the string rod, and the upper end of the slider extends out of the string rod; a slide rod is connected to the lower end of the slider, and a spring is sleeved on the slide rod. The upper end of the spring is connected to the slider, and the lower end of the spring is connected to the string rod. When the upper end of the slider contacts the production line unloading end, the spring is compressed through the action of the slider, causing the slider and the slide rod to slide and contract towards the inside of the rod body, facilitating the buffering of the impact force and also facilitating the adaptation to the gap.

[0015] The upper end of the slider is connected with a roller. The roller can better contact the blanking end of the production line, avoiding damage to the blanking end of the production line caused by the end of the slider.

[0016] The beneficial effects of the present invention are as follows: 1. The string rod swings at different angles on the connecting seat to realize the feeding, blanking and storage of spandex products on the AGV trolley. After the AGV trolley is positioned near the target production line, the first servo motor is driven to drive the string rod to swing, so that the string rod swings downward by 90 degrees and is parallel to the ground, and then the first servo motor is stopped. After the production line pushes the product onto the string rod, the first servo motor drives the string rod to swing upward to keep the product on the string rod; when the AGV trolley travels to the blanking position, the string rod is driven to swing downward by 120 degrees through the first servo motor, and then the vibrator is driven to drive the elastic support frame to vibrate. Through the action of the elastic support frame on the first servo motor, the connecting seat and the string rod, the spandex product slides from the string rod into the target container; by the way of swinging upward for receiving materials, the occupation of road space is reduced, and at the same time, the transportation stability of the product is improved.

[0017] 2. A support mechanism is arranged on the elastic support frame. When the spandex product is fed onto or stored on the AGV trolley, the support mechanism provides support for the U-shaped elastic plate, so that the upper side plate of the U-shaped elastic plate remains stable, avoiding the shaking of the upper side plate of the U-shaped elastic plate, and thus ensuring the stability of the spandex product on the AGV trolley; when the spandex product is blanked from the AGV trolley, the support mechanism cancels the support for the U-shaped elastic plate, so that the vibrator can smoothly drive the U-shaped elastic plate to vibrate, facilitating the switching of the state of the elastic support frame.

[0018] 3. A buffer assembly is arranged at the end of the string rod. When the string rod swings to contact the blanking end of the production line, it absorbs the impact force generated between the end of the string rod and the production line, improving the safety of using the string rod; and reducing the accuracy requirement for the AGV trolley to park at the blanking position of the production line, facilitating the adaptive adjustment of the gap between the AGV trolley and the blanking end of the production line, and facilitating the use of the AGV trolley. Description of the Drawings

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required to be used in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0020] Figure 1 It is a schematic structural diagram of an AGV trolley for spandex production that saves space according to the present invention; Figure 2 It is a schematic structural diagram of an elastic support frame; Figure 3It is a schematic diagram of an elliptical cylinder structure; Figure 4 It is a schematic diagram of the structure of the first servo motor; Figure 5 It is a schematic diagram of the bearing seat structure; Figure 6 It is a schematic diagram of the upper structure of the string rod; Figure 7 It is a schematic diagram of the buffer rod structure.

[0021] In the figure: 1, vehicle body; 2, elastic support frame; 3, locking mechanism; 4, first servo motor; 5, connecting seat; 6, string rod; 7, buffer assembly; 8, second servo motor; 9, vibrator; 21, U-shaped elastic plate; 22, bearing seat; 31, elliptical cylinder; 32, first rotating shaft; 41, worm; 51, first bearing; 53, second bearing; 62, stopper; 63, worm gear; 64, second rotating shaft; 71, slider; 72, roller; 73, slide bar; 74, spring. Specific embodiments

[0022] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0023] Embodiment 1, as Figure 1As shown in the figure, a space-saving AGV cart for spandex production includes a vehicle body 1. A resilient support frame 2 is provided on the top of the vehicle body 1. A first servo motor 4 is provided on the resilient support frame 2. Above the first servo motor 4, there is a connecting seat 5. A string rod 6 is swingably connected to the connecting seat 5, and the string rod 6 is drivingly connected to the first servo motor 4. A vibrator 9 is provided on the resilient support frame 2. The string rod 6 swings to different angles on the connecting seat 5 to realize the state switching of the string rod 6, thereby realizing the loading, unloading and storage of spandex products on the AGV cart. Specifically, when the string rod 6 swings to the horizontal state, the string rod 6 corresponds to the unloading position of the production line, and the production line can push the spandex product onto the string rod 6 to realize the loading of the spandex product on the AGV cart; after the spandex product is loaded, the string rod 6 swings upward to the vertical state to keep the spandex product on the string rod 6, realizing the storage of the spandex product on the AGV cart; after the AGV cart moves to the target position, the string rod 6 swings downward to make the string rod 6 in an obliquely downward position. At this time, the spandex product on the string rod 6 slides downward into the target container to realize the unloading of the spandex product on the AGV cart; in addition, when the spandex product is unloaded from the AGV cart, the vibrator can drive the resilient support frame 2 to vibrate, and then drive the string rod 6 to vibrate, making the spandex product on the string rod 6 easier to slide downward; the string rod 6 reduces the occupation of road space by the way of upward swinging for collecting materials, and improves the transportation stability of the product at the same time.

[0024] Further, as Figure 2 shown, the resilient support frame 2 includes a U-shaped resilient plate 21 arranged horizontally. The lower side plate of the U-shaped resilient plate 21 is connected to the vehicle body 2. The first servo motor 4 and the vibrator 9 are arranged on the upper side plate of the U-shaped resilient plate 21. In this embodiment, the number of the resilient support frames 2 is two, and the two resilient support frames 2 are arranged oppositely on the top of the vehicle body 1. Six first servo motors 4 are provided on the upper side plate of each resilient support frame 2. The upper side plate provides support for the first servo motor 4 and the vibrator 9. When the vibrator 9 works, it drives the first servo motor 4 to vibrate through the upper side plate, thereby realizing the vibration of the string rod 6 and facilitating unloading; in addition, a set of first servo motors 4 is provided on each resilient support frame 2, effectively increasing the loading quantity of the AGV cart and improving the transportation efficiency of the AGV cart.

[0025] Furthermore, a support mechanism 3 for supporting the U-shaped elastic plate 21 is provided on the elastic support frame 2; the support mechanism 3 is connected to the lower side plate of the U-shaped elastic plate 21, and the support structure 3 is located between the upper side plate and the lower side plate of the U-shaped elastic plate 21. Specifically, when the AGV cart is loading or storing spandex products, the support mechanism 3 can support the upper side plate and the lower side plate of the U-shaped elastic plate 21, prevent the upper side plate of the U-shaped elastic plate 21 from shaking, ensure the support stability of the upper side plate for the first servo motor 4 and the string rod 6, and further ensure the support stability for the spandex products; when the AGV cart is unloading spandex products, the support mechanism 3 cancels the support for the upper side plate and the lower side plate, so that the vibrator 9 can smoothly drive the upper side plate to vibrate, facilitating the unloading of the AGV cart; the switching of the support state of the support mechanism 3 for the U-shaped elastic plate 21 can realize the switching of the working state of the U-shaped elastic plate 21 and ensure the structural stability of the U-shaped elastic plate 21.

[0026] Embodiment 2. On the basis of Embodiment 1, an AGV cart for spandex production that saves space, as Figure 3 shown, the support mechanism 3 includes an ellipsoidal cylinder 31. The two ends of the ellipsoidal cylinder 31 are connected with first rotating shafts 32. Bearing seats 22 are provided on the lower side plate of the U-shaped elastic plate 21. The first rotating shafts 32 are rotatably connected with the bearing seats 22. A second servo motor 8 is provided outside the bearing seats 22. The output end of the second servo motor 8 is connected with the first rotating shaft 32. The bearing seats 22 are arranged at both ends of the U-shaped elastic plate 21. The ellipsoidal cylinder 31 is rotatably installed on the bearing seats 22 through the first rotating shafts 32. The ellipsoidal cylinder 31 is arranged along the axis direction of the U-shaped elastic plate 21, and the ellipsoidal cylinder 31 is arranged at the opening position of the U-shaped elastic plate 21, that is, the ellipsoidal cylinder 31 can support the opening position of the U-shaped elastic plate 21, thereby effectively improving the support stability of the support mechanism 3 for the U-shaped elastic plate 21; in addition, the second servo motor 8 can drive the ellipsoidal cylinder 31 to rotate through the first rotating shaft 32, thereby realizing the switching of the position state of the ellipsoidal cylinder 31, and further realizing the switching of the support state of the U-shaped elastic plate 21, facilitating the loading and unloading of spandex products.

[0027] Furthermore, the cross-sectional shape of the ellipsoidal cylinder 31 is an ellipse, and the length of the major axis of the ellipse is greater than or equal to the distance between the upper side plate and the lower side plate of the U-shaped elastic plate 21. When the ellipsoidal cylinder 31 rotates to the position where the major axis of the ellipse is in the vertical state, the ellipsoidal cylinder 31 supports the upper side plate of the U-shaped elastic plate 21, restricts the elastic deformation of the U-shaped elastic plate 21, and enables the U-shaped elastic plate 21 to provide stable support for the string rod 6; when the ellipsoidal cylinder 31 rotates to the position where the major axis of the ellipse is in the horizontal state, the ellipsoidal cylinder 31 cancels the support for the upper side plate of the U-shaped elastic plate 21, enabling the U-shaped elastic plate 21 to undergo elastic deformation. At this time, the vibrator 9 can drive the U-shaped elastic plate 21 to vibrate, facilitating the unloading of spandex products.

[0028] Furthermore, as shown in Figure 4 , Figure 5 , Figure 6 , a worm 41 is connected to the output end of the first servo motor 4. A worm gear 63 is rotatably connected to the connecting seat 5. The worm 41 meshes with the worm gear 63. The lower end of the string rod 6 is connected to the outer circumferential surface of the worm gear 63. Specifically, a second bearing 53 is provided on the upper side of the connecting seat 5. The outer ring of the second bearing 53 is fixedly connected to the connecting seat 5, and the inner ring of the second bearing 53 is connected to the worm 41. The second bearing 53 provides support for the upper end of the worm 41. A first bearing 51 is provided on the side of the connecting seat 5. The outer ring of the first bearing 51 is fixedly connected to the connecting seat 5. A second rotating shaft 64 is provided on the worm gear 63. The second rotating shaft 64 is connected to the inner ring of the first bearing 51. The first bearing 51 provides support for the worm gear 63 at the lower end of the string rod 6. The first servo motor 4 can drive the worm 41 to rotate, and drive the string rod 6 to swing on the connecting seat 5 through the meshing of the worm and the worm gear, so as to realize the adjustment of the position state of the string rod 6.

[0029] Furthermore, a stop block 62 is provided at the lower end of the string rod 6. The stop block 62 is located outside the connecting seat 5. After the spandex product is threaded onto the string rod 6, the stop block 62 provides support for the spandex product, preventing the spandex product from directly contacting the connecting seat 5, ensuring that there is no friction between the spandex product on the string rod 6 and the connecting seat 5 when the string rod 6 swings, thereby avoiding damage to the spandex product caused by friction and ensuring the transportation safety of the spandex product.

[0030] Furthermore, a buffer assembly 7 is provided at the upper end of the string rod 6. During the process of the string rod 6 swinging to the position corresponding to the production line feeding position, the buffer assembly 7 absorbs the impact force generated between the end of the string rod 6 and the production line, improves the safety of using the string rod 6, and reduces the accuracy requirement for the AGV cart to park at the production line feeding position, that is, the distance between the AGV cart and the production line feeding end can fluctuate within a large range when the AGV cart parks, reducing the accuracy requirement for the AGV cart to park and facilitating the adaptive adjustment of the gap between the AGV cart and the production line feeding end.

[0031] Furthermore, as shown in Figure 7 , the buffer assembly 7 includes a slider 71. The slider 71 is slidably matched with the string rod 6, and the upper end of the slider 71 extends out of the string rod 6. A sliding rod 73 is connected to the lower end of the slider 71. A spring 74 is sleeved on the sliding rod 73. The upper end of the spring 74 is connected to the slider 71, and the lower end of the spring 74 is connected to the string rod 6. When the upper end of the slider 71 contacts the production line feeding end, the spring 74 is compressed by the action of the slider 71, causing the slider 71 and the sliding rod 73 to slide and contract into the string rod 6, facilitating the buffering of the impact force and also facilitating the adaptive gap.

[0032] Further, a roller 72 is connected to the upper end of the slider 71. The roller 72 can better contact the blanking end of the production line, avoiding damage to the blanking end of the production line by the end of the slider 71.

[0033] Working principle of the AGV vehicle: When the vehicle body 1 of the AGV vehicle moves and positions near the target production line, the second servo motor 8 drives the elliptical cylinder 31 to rotate, so that the long axis of the elliptical cylinder 31 rotates to the vertical state. At this time, the elliptical cylinder 31 provides support for the elastic support frame 2; then the first servo motor 4 is driven to drive the string rod 6 to swing, so that the string rod 6 swings downward by 90 degrees and is parallel to the ground, and then the first servo motor 4 stops. During the swinging process of the string rod 6, the buffer assembly 7 is used to buffer the impact force between the string rod 6 and the production line. After the spandex product is pushed onto the string rod 6 by the production line, the first servo motor 4 drives the string rod 6 to swing upward, so that the spandex product is held on the string rod 6; when the vehicle body 1 of the AGV vehicle travels to the blanking position, the second servo motor 8 drives the elliptical cylinder 31 to rotate, so that the long axis of the elliptical cylinder 31 rotates to the horizontal state. At this time, the elliptical cylinder 31 cancels the support for the elastic support frame 2; then the string rod 6 is driven to swing downward by 120 degrees through the first servo motor 4, so that the string rod 6 is in an obliquely downward state, and then the vibrator 9 is driven to drive the elastic support frame 2 to vibrate. Through the elastic support frame 2 acting on the first servo motor 4, the connecting seat 5 and the string rod 6, the product slides from the string rod 6 into the target container.

[0034] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An AGV cart for spandex production that saves space, comprising a vehicle body (1), characterized in that, An elastic support frame (2) is provided on the top of the vehicle body (1), a first servo motor (4) is provided on the elastic support frame (2), a connecting seat (5) is provided above the first servo motor (4), a string rod (6) is swingably connected to the connecting seat (5), and the string rod (6) is drivingly connected to the first servo motor (4); a vibrator (9) is provided on the elastic support frame (2).

2. The space-saving AGV cart for spandex production according to claim 1, wherein The elastic support frame (2) comprises a U-shaped elastic plate (21) arranged transversely, the lower side plate of the U-shaped elastic plate (21) is connected to the vehicle body (2), and the first servo motor (4) and the vibrator (9) are arranged on the upper side plate of the U-shaped elastic plate (21).

3. The space-saving AGV cart for spandex production according to claim 2, wherein, The elastic support frame (2) is provided with a support mechanism (3) for supporting the U-shaped elastic plate (21); the support mechanism (3) is connected to the lower side plate of the U-shaped elastic plate (21), and the support structure (3) is located between the upper side plate and the lower side plate of the U-shaped elastic plate (21).

4. The space-saving AGV cart for spandex production according to claim 3, wherein, The support mechanism (3) comprises an elliptical cylinder (31), two ends of the elliptical cylinder (31) are connected to a first rotating shaft (32), a bearing seat (22) is provided on the lower side plate of the U-shaped elastic plate (21), the first rotating shaft (32) is rotatably connected to the bearing seat (22), a second servo motor (8) is provided outside the bearing seat (22), and an output end of the second servo motor (8) is connected to the first rotating shaft (32).

5. The space-saving AGV cart for spandex production according to claim 4, characterized in that, The cross-sectional shape of the elliptical cylinder (31) is an ellipse, and the length of the major axis of the ellipse is greater than or equal to the distance between the upper side plate and the lower side plate of the U-shaped elastic plate (21).

6. The space-saving AGV cart for spandex production according to any one of claims 1 to 5, characterized in that, The output end of the first servo motor (4) is connected to a worm (41), a worm wheel (63) is rotatably connected to the connection seat (5), the worm (41) is meshed with the worm wheel (63), and the lower end of the string rod (6) is connected to the outer cylindrical surface of the worm wheel (63).

7. The space-saving AGV cart for spandex production according to claim 6, characterized in that, A stopper (62) is provided at the lower end of the string rod (6), and the stopper (62) is located outside the connecting seat (5).

8. The space-saving AGV cart for spandex production according to claim 7, wherein, A buffer assembly (7) is provided at the upper end of the string rod (6).

9. The space-saving AGV cart for spandex production according to claim 8, characterized in that, The buffer assembly (7) comprises a slider (71), the slider (71) and the string rod (6) are slidably matched, and the upper end of the slider (71) extends out of the string rod (6); the lower end of the slider (71) is connected to a slider (73), and a spring (74) is sleeved on the slider (73), the upper end of the spring (74) is connected to the slider (71), and the lower end of the spring (74) is connected to the string rod (6).

10. The space-saving AGV cart for spandex production according to claim 9, characterized in that, The upper end of the slider (71) is connected to a roller (72).

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