Large shelf rack

Abstract

The invention relates to the technical field of storage equipment, in particular to a large shelf rack which comprises a main body frame, bearing shelf boards, a driving mechanism and a supporting mechanism, and the main body frame comprises a left side frame, a right side frame and a middle frame fixedly installed on the opposite faces of the left side frame and the right side frame through bolts. According to the large shelf rack, a handle on the front face of the protective cover is rotated to drive a worm to rotate, a supporting shaft is driven to rotate through meshing transmission between a worm gear and the worm, after the supporting shaft rotates, a first straight gear rotates along with the supporting shaft, and through meshing transmission between the first straight gear and a first straight rack, a pulling plate can be driven to move in the direction of a sliding rail, and goods are moved out of a main body frame; the drawing plates can be accurately drawn along the sliding rails through the driving mechanism, the problem that goods on the inner side of a traditional shelf frame are inconvenient to take and place is solved, the drawing plates are effectively prevented from accidentally moving when the goods are stored and taken through the self-locking characteristic of the worm gear and the worm, and operation stability is guaranteed.

Description

Technical Field

[0001] This application relates to the field of storage equipment technology, and in particular to a large shelf rack. Background Technology

[0002] Large-shelf racks are heavy-duty shelving systems used in warehousing or logistics scenarios. Their core function is to efficiently and stably store and retrieve large goods. Large-shelf racks are modular storage equipment with uprights, beams, and shelves as core components. They are widely used in manufacturing, third-party logistics, and distribution centers, adapting to the storage needs of various types of goods in small or large batches.

[0003] However, existing large-shelf racks have the following drawbacks: it is not easy to access items on the inner side of the large-shelf rack after goods are placed on it. Some large-shelf racks also use a pull-out structure. Although the pull-out can be pulled out to make it easier to access items on the inner side of the pull-out, the pull-out is suspended in the air after being pulled out, which can cause it to sag. In addition, the pull-out has no limit mechanism, which can cause the pull-out to move when goods are retrieved, affecting the stability of the goods.

[0004] Therefore, this application provides a large shelf rack. Summary of the Invention

[0005] The purpose of this application is to solve at least one technical problem raised in the background art.

[0006] This application provides a large shelf rack, including a main frame, a load-bearing shelf, a drive mechanism, and a support mechanism. The main frame includes a left side frame, a right side frame, and a middle frame fixed to the opposite sides of the left and right side frames by bolts. Multiple sets of crossbars are equidistantly fixed to the inner walls of both the left and right side frames. The load-bearing shelf consists of multiple sets of slide rails and drawers. Each set of slide rails and crossbar has two sections. Each set of slide rails is fixed to the surface of a set of crossbars by bolts. The drawers slide against the inner walls of the slide rails via rollers, which roll along the inner walls to allow the drawers to be pulled out. The drive mechanism is located inside the main frame and is used to drive the drawers to move along the slide rails. The support mechanism is located inside the main frame and is used to support the drawers and prevent them from sagging.

[0007] By adopting the above technical solution, the left and right side frames are arranged vertically with pre-drilled mounting holes on the surface. The two sides of the middle frame are connected to the left and right side frames respectively by bolts, which enhances the main frame's resistance to lateral displacement. A set of slide rails are fixed to the surface of a set of crossbars by bolts. When the rollers roll along the inner wall of the slide rails, they can drive the drawer to be pulled freely within the slide rails. The guiding effect of the slide rails limits the range of movement of the drawer and prevents it from derailing. The roller design greatly reduces friction and improves the smoothness of operation. The drawer is used to carry materials. The load of the drawer is transferred to the crossbars through the rollers, and then evenly distributed to the main frame by the crossbars, avoiding local stress concentration and ensuring structural durability.

[0008] Preferably, the surfaces of the left side frame, the right side frame, and the middle frame are all fixedly fitted with protective plates by bolts, and an identification frame is fixedly fitted on the upper surface of the main frame.

[0009] By adopting the above technical solution, protective plates are fixed to the surfaces of the left side frame, right side frame and middle frame with bolts, which can protect the three sides of the main frame. At the same time, a label frame is fixed to the upper surface of the main frame for pasting classification labels or product information cards. The size is adapted to common cards, which facilitates quick identification of item categories.

[0010] Preferably, the drive mechanism includes an assembly plate fixedly mounted on the lower surface of the crossbar on the left and right side frames by bolts, a support shaft rotatably mounted on the opposite surfaces of the two assembly plates by bearings, two first straight gears symmetrically fixedly mounted on the surface of the support shaft, and two first straight racks symmetrically fixedly mounted on the lower surface of the draw plate.

[0011] Preferably, the first spur rack meshes with the first spur gear, and the mounting plate is arranged perpendicular to the crossbar.

[0012] By adopting the above technical solution, two first straight gears are symmetrically fixedly installed on the surface of the support shaft, and two first straight racks are symmetrically fixedly installed on the lower surface of the draw plate. When the support shaft rotates, it will drive the first straight gears to rotate. By using the meshing transmission between the first straight gears and the first straight racks, the draw plate can be moved on the slide rail, thereby removing the material on the draw plate from the main frame.

[0013] Preferably, the drive mechanism further includes a worm gear rotatably mounted on the right side of the right side frame, a worm rotatably mounted on the right side of the right side frame via a connecting bracket, and a protective cover fixedly mounted on the right side of the right side frame, wherein the worm gear and the worm are engaged in transmission.

[0014] Preferably, the worm gear and worm are located inside a protective cover, and a handle is rotatably connected to the front of the protective cover. The shaft end of the handle extends into the interior of the protective cover and is fixedly connected to the shaft end of the worm. The right end of the support shaft extends into the interior of the protective cover and is fixedly connected to the shaft end of the worm gear.

[0015] By adopting the above technical solution, a protective cover is fixedly installed on the right side of the right frame, and the worm gear and worm are placed inside it to prevent dust from entering. The worm can be driven to rotate by rotating the handle. The meshing transmission between the worm gear and the worm can drive the worm gear and the support shaft to rotate, thereby realizing the precise movement of the drawer plate. At the same time, by utilizing the self-locking principle of the worm gear and the worm, the movement of the drawer plate can be prevented from causing the worm to rotate, thereby preventing the drawer plate from moving when picking up materials on the drawer plate.

[0016] Preferably, the support mechanism includes a rotating shaft rotatably mounted on the opposite sides of two mounting plates, a rotating rod fixedly mounted on the surface of the rotating shaft, and a lifting plate fixedly mounted on the front of the rotating rod. The rotating rod is L-shaped, and the L-shaped structure ensures that the lifting plate can effectively lift the drawer when rotating.

[0017] By adopting the above technical solution, when the drawer slides out along the slide rail, the rotating rod rotates 90 degrees, and the lifting plate will contact the drawer, thereby lifting the lower end of the drawer, effectively reducing the risk of the drawer sagging and improving the stability of the goods.

[0018] Preferably, the support mechanism further includes a track block fixedly installed at the lower end of the assembly plate, a groove formed on the surface of the track block, a second spur rack slidably fitted on the inner wall of the groove, a second spur gear fixedly installed on the surface of the rotating shaft, and a pushing component disposed on the back of the track block, wherein the second spur gear meshes with the second spur rack for transmission.

[0019] Preferably, the pushing component includes a through hole on the back of the track block, a push rod that slides on the inner wall of the through hole, a stop block fixedly installed on the back of the push rod, a return spring sleeved on the surface of the push rod, and a push plate symmetrically fixedly installed on the lower surface of the drawer plate.

[0020] By adopting the above technical solution, when the pull plate slides out along the slide rail, the push plate will contact the stop block and push the push rod to move forward. When the push rod moves, it will drive the second spur rack to move along the slide groove on the track block. When the second spur rack moves forward, it can drive the second spur gear to rotate forward by meshing with the second spur gear, thereby driving the rotating rod to rotate 90 degrees.

[0021] Preferably, the two ends of the return spring abut against the opposite surfaces of the stop block and the track block, and the push plate and the stop block are on the same axis to ensure that the push plate can accurately push the stop block when it moves.

[0022] By adopting the above technical solution, in the initial state, the pull plate is located inside the main frame, the lifting plate is located inside the main frame, and the return spring is in the natural state. When the push rod slides along the through hole, the return spring is in the contracted state. When the push plate disengages from the stop block, the return spring is reset, which can drive the second spur rack to reset. At this time, the second spur gear rotates in the opposite direction, which can drive the rotating rod to rotate in the opposite direction by ninety degrees and then reset.

[0023] In summary, this application includes at least one of the following beneficial technical effects:

[0024] 1. The large shelf rack described in this application rotates by rotating the handle on the front of the protective cover to drive the worm gear to rotate. The meshing transmission between the worm gear and the worm wheel drives the support shaft to rotate. After the support shaft rotates, the first spur gear rotates accordingly. Through the meshing transmission with the first spur rack, the drawer can be driven to move along the slide rail and remove the goods from the main frame. The drive mechanism allows the drawer to be pulled out precisely along the slide rail, solving the problem of inconvenient loading and unloading of goods inside the traditional shelf rack. Furthermore, the self-locking characteristics of the worm gear and the worm wheel effectively prevent the drawer from moving accidentally during the storage and retrieval of goods, ensuring stable operation.

[0025] 2. In the large shelf rack described in this application, when the drawer slides out along the slide rail, the push plate moves synchronously with the drawer for a certain distance and then contacts the stop block, pushing the push rod to move forward. At this time, the push rod 407 drives the second spur rack to move along the slide groove of the track block. Through the meshing transmission with the second spur gear, the rotating rod can be driven to rotate 90 degrees. At this time, the lifting plate will contact the bottom of the drawer and lift it. Through the L-shaped rotating rod and lifting plate design of the support mechanism, in conjunction with the push plate and the second spur rack, the automatic linkage between the movement of the drawer and the rotation of the lifting plate can be realized. When the drawer slides out, the lower end of the drawer is automatically lifted, effectively reducing the risk of the drawer sagging and improving the stability of the goods.

[0026] 3. The large shelf rack described in this application uses a return spring. When the push plate disengages from the stop block, the return spring contracts, thereby driving the second spur rack to return to its original position. At this time, the second spur gear rotates in the opposite direction, thereby driving the rotating rod to rotate in the opposite direction by 90 degrees before returning to its original position without additional operation, thus improving efficiency. Attached Figure Description

[0027] Figure 1 This is a three-dimensional structural diagram of an embodiment of this application;

[0028] Figure 2 This is a schematic diagram of the three-dimensional structure of the right side border of an embodiment of this application;

[0029] Figure 3 This is a schematic diagram of the three-dimensional structure of the middle frame in an embodiment of this application;

[0030] Figure 4This is a three-dimensional structural diagram of an embodiment of this application after the removal of the pull plate;

[0031] Figure 5 This is a three-dimensional structural diagram of the drive mechanism according to an embodiment of this application;

[0032] Figure 6 This is a side sectional view of an embodiment of this application;

[0033] Figure 7 yes Figure 1 Enlarged structural diagram at point A in the middle;

[0034] Figure 8 yes Figure 4 Enlarged structural diagram at point B.

[0035] Explanation of reference numerals in the attached drawings: 100, main frame; 101, left side border; 102, right side border; 103, middle frame; 104, horizontal bar; 105, protective plate; 106, identification frame;

[0036] 200. Load-bearing shelf; 201. Slide rail; 202. Drawer panel;

[0037] 300. Drive mechanism; 301. Assembly plate; 302. Support shaft; 303. First spur gear; 304. First spur rack; 305. Worm gear; 306. Worm; 307. Protective cover; 308. Handle; 309. Connecting frame;

[0038] 400. Support mechanism; 401. Rotating shaft; 402. Rotating rod; 403. Lifting plate; 404. Track block; 405. Second spur rack; 406. Second spur gear; 407. Push rod; 408. Stop block; 409. Return spring; 410. Push plate. Detailed Implementation

[0039] The following combination Figures 1 to 8 This application will be described in further detail below.

[0040] Example 1

[0041] Reference Figures 1 to 4 ,as well as Figures 7 to 8A large shelf rack includes a main frame 100, a load-bearing shelf 200, a drive mechanism 300, and a support mechanism 400. The main frame 100 includes a left side frame 101, a right side frame 102, and a middle frame 103 bolted to the opposite sides of the left side frame 101 and the right side frame 102. Multiple sets of crossbars 104 are equidistantly fixed to the inner walls of the left side frame 101 and the right side frame 102. The load-bearing shelf 200 consists of multiple sets of slide rails 201 and drawer panels 202. Each set of slide rails 201 and drawer panel 400... There are two crossbars 104 in each set. A set of slide rails 201 are fixedly installed on the surface of the set of crossbars 104 by bolts. The draw plate 202 slides with the inner wall of the slide rail 201 through rollers. The rollers roll along the inner wall of the slide rail 201 to realize the draw plate 202 being pulled out. The drive mechanism 300 is set inside the main frame 100 and is used to drive the draw plate 202 to move along the slide rail 201. The support mechanism 400 is set inside the main frame 100 and is used to support the draw plate 202 to prevent it from sagging.

[0042] Specifically, the left side frame 101 and the right side frame 102 are arranged vertically with pre-drilled mounting holes on their surfaces. The two sides of the middle frame 103 are connected to the left side frame 101 and the right side frame 102 respectively by bolts, which can enhance the anti-lateral displacement capability of the main frame 100. At the same time, a set of slide rails 201 are fixed to the surface of a set of crossbars 104 by bolts. When the rollers roll along the inner wall of the slide rails 201, they can drive the drawer plate 202 to be pulled freely within the slide rails 201. The guiding effect of the slide rails 201 limits the movement range of the drawer plate 202 and prevents it from derailing. The roller design greatly reduces friction and improves the smoothness of operation. The drawer plate 202 is used to carry materials. The load of the drawer plate 202 is transferred to the crossbars 104 through the rollers, and then evenly distributed to the main frame 100 by the crossbars 104, avoiding local stress concentration and ensuring structural durability.

[0043] See Figures 1 to 3 The left side frame 101, the right side frame 102, and the middle frame 103 are all fixedly mounted with protective plates 105 by bolts, and the upper surface of the main frame 100 is fixedly mounted with a sign frame 106.

[0044] Specifically, protective plates 105 are fixed to the surfaces of the left side frame 101, right side frame 102, and middle frame 103 using bolts to protect three sides of the main frame 100. At the same time, a label frame 106 is fixed to the upper surface of the main frame 100 for attaching classification labels or product information cards. The size is adapted to common cards, making it easy to quickly identify the category of items.

[0045] See Figure 1 , Figure 5 as well as Figure 6The drive mechanism 300 includes an assembly plate 301 bolted to the lower surface of the crossbar 104 on the left side frame 101 and the right side frame 102; a support shaft 302 rotatably mounted on the opposite surfaces of the two assembly plates 301 via bearings; two first spur gears 303 symmetrically fixed to the surface of the support shafts 302; and two first spur racks 304 symmetrically fixed to the lower surface of the drawer plate 202. The first spur racks 304 mesh with the first spur gears 303 for transmission. The assembly plate 301 is arranged perpendicular to the crossbar 104. The drive mechanism 300 also includes a component rotatably mounted on the right side frame 102. The worm gear 305 on the right side is rotatably mounted on the worm 306 on the right side of the right frame 102 via the connecting bracket 309, and a protective cover 307 is fixedly mounted on the right side of the right frame 102. The worm gear 305 and the worm 306 mesh and drive each other. The worm gear 305 and the worm 306 are located inside the protective cover 307. A handle 308 is rotatably connected to the front of the protective cover 307. The shaft end of the handle 308 extends into the interior of the protective cover 307 and is fixedly connected to the shaft end of the worm 306. The right end of the support shaft 302 extends into the interior of the protective cover 307 and is fixedly connected to the shaft end of the worm gear 305.

[0046] Specifically, a protective cover 307 is fixedly installed on the right side of the right frame 102, housing the worm gear 305 and worm 306 to prevent dust intrusion. Rotating the handle 308 drives the worm 306 to rotate. The meshing transmission between the worm gear 305 and worm 306 drives the worm gear 305 and support shaft 302 to rotate. Two first spur gears 303 are symmetrically fixedly installed on the surface of the support shaft 302, and two first spur racks 304 are symmetrically fixedly installed on the lower surface of the drawer plate 202. When… After the support shaft 302 rotates, it will drive the first spur gear 303 to rotate. The first spur gear 303 meshes with the first spur rack 304 to drive the drawer plate 202 to move on the slide rail 201, thereby removing the material on the drawer plate 202 from the main frame 100. At the same time, the self-locking principle of the worm gear 305 and the worm 306 can prevent the drawer plate 202 from moving and causing the worm 306 to rotate, thus preventing the drawer plate 202 from moving when the material on the drawer plate is taken out.

[0047] The working principle of this embodiment is as follows:

[0048] The main frame 100 is composed of a left side frame 101, a right side frame 102, and a middle frame 103, which are fixed together by bolts to form a vertical support structure. Horizontal bars 104 are equidistantly installed on the inner walls of the left side frame 101 and the right side frame 102. The horizontal bars 104 serve as the fixed base for the slide rail 201. The load-bearing shelf 200 consists of the slide rail 201 and a drawer plate 202. The slide rail 201 is fixed to the surface of the horizontal bars 104 by bolts. The drawer plate 202 slides against the inner wall of the slide rail 201 via rollers. The rollers allow the drawer plate 202 to be freely pulled along the slide rail 201 while limiting its range of motion to prevent derailment. When the drawer plate 202 bears weight, the rollers transfer the load to the horizontal bars 104, which then distribute the load evenly across the main frame 100, avoiding localized load distribution. Stress concentration occurs when the drawer 202 is initially positioned inside the main frame 100, with goods placed on it. When goods need to be accessed, the operator rotates the handle 308 on the front of the protective cover 307. The handle 308 drives the worm gear 306 to rotate. Through the meshing transmission between the worm wheel 305 and the worm gear 306, the support shaft 302 rotates. After the support shaft 302 rotates, the first spur gear 303 rotates accordingly. Through the meshing transmission between the first spur gear 303 and the first spur rack 304, the drawer 202 can be driven to move along the slide rail 201, moving the goods out of the main frame 100. At the same time, the self-locking characteristics of the worm wheel 305 and the worm gear 306 can prevent the drawer 202 from moving accidentally during the access of goods, ensuring operational stability.

[0049] Example 2

[0050] Compared with Embodiment 1, another implementation of this application is as follows:

[0051] See Figure 4 , Figures 6 to 8 The support mechanism 400 includes a rotating shaft 401 rotatably mounted on the opposite sides of two mounting plates 301, a rotating rod 402 fixedly mounted on the surface of the rotating shaft 401, and a lifting plate 403 fixedly mounted on the front of the rotating rod 402. The rotating rod 402 is L-shaped, and the L-shaped structure ensures that the lifting plate 403 can effectively lift the drawer plate 202 when rotating. The support mechanism 400 also includes a track block 404 fixedly mounted on the lower end of the mounting plate 301, with a groove formed on the surface of the track block 404, and the track block 404 slidingly engaging within the groove. The second spur rack 405 is fixedly mounted on the surface of the rotating shaft 401, and a pushing component is provided on the back of the track block 404. The second spur gear 406 meshes with the second spur rack 405 for transmission. The pushing component includes a through hole opened on the back of the track block 404, a push rod 407 slidably fitted on the inner wall of the through hole, a stop block 408 fixedly mounted on the back of the push rod 407, a return spring 409 sleeved on the surface of the push rod 407, and a push plate 410 symmetrically fixedly mounted on the lower surface of the drawer plate 202.

[0052] Specifically, when the drawer 202 slides out along the slide rail 201, the pusher 410 contacts the stop block 408, which pushes the push rod 407 to move forward. When the push rod 407 moves, it drives the second spur rack 405 to move along the groove on the track block 404. When the second spur rack 405 moves forward, it meshes with the second spur gear 406, which drives the second spur gear 406 to rotate forward. This drives the rotating rod 402 to rotate 90 degrees. When the drawer 202 slides out along the slide rail 201, the rotating rod 402 rotates 90 degrees, and the lifting plate 403 contacts the bottom of the drawer 202, which lifts the bottom of the drawer 202, effectively reducing the risk of the drawer 202 sagging and improving the stability of the goods.

[0053] See Figure 8 The two ends of the return spring 409 abut against the opposite surfaces of the stop block 408 and the track block 404, respectively, and the push plate 410 and the stop block 408 are on the same axis, ensuring that the push plate 410 can accurately push the stop block 408 when it moves.

[0054] Specifically, in the initial state, the pull plate 202 is located inside the main frame 100, the lifting plate 403 is located inside the main frame 100, and the return spring 409 is in the natural state. When the push rod 407 slides forward along the through hole, the return spring 409 is in the contracted state. When the push plate 410 disengages from the stop block 408, the return spring 409 is reset, which can drive the second spur rack 405 to reset. The second spur rack 405 meshes with the second spur gear 406 for transmission. At this time, the second spur gear 406 rotates in the opposite direction, which can drive the rotating rod 402 to rotate in the opposite direction by ninety degrees and then reset, preparing for the next rotation of the rotating rod 402.

[0055] The working principle of this embodiment is as follows: In the initial state, the drawer plate 202 is located inside the main frame 100, the support plate 403 is located inside the main frame 100, and the return spring 409 is in its natural state. When the drawer plate 202 slides out along the slide rail 201, the push plate 410 moves synchronously with the drawer plate 202 for a certain distance and then contacts the stop block 408, pushing the push rod 407 to move forward. At this time, the push rod 407 will drive the second straight rack 405 to move along the slide groove of the track block 404, while the return spring 409 is in a contracted state. Through the meshing transmission of the second spur rack 405 and the second spur gear 406, the rotating rod 402 can be driven to rotate 90 degrees. At this time, the lifting plate 403 will contact the bottom of the drawer 202 and lift it. The lifting force can counteract the sagging deformation of the drawer 202 caused by the load and improve the stability of the goods. When the drawer 202 is retracted, the push plate 410 will disengage from the stop block 408, the return spring 409 will return to its original position, drive the second spur rack 405 to return to its original position, and then drive the rotating rod 402 to rotate 90 degrees in the opposite direction, so that the lifting plate 403 returns to its original position.

[0056] Workflow:

[0057] In the initial state, the drawer 202 is located inside the main frame 100, and the goods are placed on it. When it is necessary to store or retrieve the goods, the operator rotates the handle 308 on the front of the corresponding protective cover 307. The handle 308 drives the worm gear 306 to rotate. Through the meshing transmission of the worm wheel 305 and the worm gear 306, the support shaft 302 is driven to rotate. After the support shaft 302 rotates, the first spur gear 303 rotates accordingly. Through the meshing transmission with the first spur rack 304, the corresponding drawer 202 is driven to move along the slide rail 201, so that the goods can be moved out of the main frame 100. The self-locking characteristics of the worm wheel 305 and the worm gear 306 prevent the drawer 202 from moving accidentally when storing or retrieving goods, ensuring operational stability.

[0058] When the drawer plate 202 slides out along the slide rail 201, the push plate 410 moves synchronously with the drawer plate 202 for a certain distance and then contacts the stop block 408, pushing the push rod 407 to move forward. At this time, the push rod 407 will drive the second spur rack 405 to move along the slide groove of the track block 404. Through the meshing transmission with the second spur gear 406, it drives the rotating rod 402 to rotate ninety degrees. At this time, the lifting plate 403 will contact the bottom of the drawer plate 202 and lift it, effectively reducing the risk of the drawer plate 202 sagging and improving the stability of the goods.

[0059] When the handle 308 is rotated in the opposite direction, the drawer 202 is retracted, and the pusher 410 disengages from the stop block 408. The return spring 409 uses its restoring force to drive the second rack 405 to return to its original position, which in turn drives the rotating rod 402 to rotate 90 degrees in the opposite direction, thus restoring the lifting plate 403. This design achieves automatic linkage between the movement and support of the drawer 202 without additional operation, improving efficiency.

Claims

1. A large shelf unit, characterized in that, include: The main frame (100) includes a left side frame (101), a right side frame (102), and a middle frame (103) that is fixedly installed on the opposite side of the left side frame (101) and the right side frame (102) by bolts. Multiple sets of crossbars (104) are fixedly installed at equal intervals on the inner walls of the left side frame (101) and the right side frame (102). The support plate (200) is composed of multiple sets of slide rails (201) and a drawer plate (202). There are two sets of slide rails (201) and two sets of crossbars (104). The slide rails (201) are fixedly installed on the surface of the crossbars (104) by bolts. The drawer plate (202) slides with the inner wall of the slide rail (201) through rollers. The rollers roll along the inner wall of the slide rail (201) to realize the pull-out movement of the drawer plate (202). A drive mechanism (300) is disposed inside the main frame (100) and is used to drive the drawer (202) to move along the slide rail (201); A support mechanism (400) is provided inside the main frame (100) to support the drawer (202) and prevent it from sagging.

2. A large shelf rack according to claim 1, characterized in that, The surfaces of the left side frame (101), the right side frame (102), and the middle frame (103) are all fixedly fitted with guard plates (105) by bolts, and the upper surface of the main frame (100) is fixedly fitted with an identification frame (106).

3. A large shelf rack according to claim 1, characterized in that, The drive mechanism (300) includes an assembly plate (301) fixedly mounted on the lower surface of the crossbar (104) on the left side frame (101) and the right side frame (102) by bolts, a support shaft (302) rotatably mounted on the opposite side of the two assembly plates (301) by bearings, two first straight gears (303) symmetrically fixedly mounted on the surface of the support shaft (302), and two first straight racks (304) symmetrically fixedly mounted on the lower surface of the drawer plate (202).

4. A large shelf rack according to claim 3, characterized in that, The first spur rack (304) meshes with the first spur gear (303) for transmission, and the mounting plate (301) is set perpendicular to the crossbar (104).

5. A large shelf rack according to claim 3, characterized in that, The drive mechanism (300) further includes a worm wheel (305) rotatably mounted on the right side of the right side frame (102), a worm (306) rotatably mounted on the right side of the right side frame (102) via a connecting bracket (309), and a protective cover (307) fixedly mounted on the right side of the right side frame (102), wherein the worm wheel (305) and the worm (306) mesh and transmit power.

6. A large shelf rack according to claim 5, characterized in that, The worm gear (305) and worm (306) are located inside the protective cover (307). A handle (308) is rotatably connected to the front of the protective cover (307). The shaft end of the handle (308) extends into the interior of the protective cover (307) and is fixedly connected to the shaft end of the worm (306). The right end of the support shaft (302) extends into the interior of the protective cover (307) and is fixedly connected to the shaft end of the worm gear (305).

7. A large shelf rack according to claim 6, characterized in that, The support mechanism (400) includes a rotating shaft (401) rotatably mounted on the opposite sides of two mounting plates (301), a rotating rod (402) fixedly mounted on the surface of the rotating shaft (401), and a lifting plate (403) fixedly mounted on the front of the rotating rod (402). The rotating rod (402) is L-shaped, and the L-shaped structure ensures that the lifting plate (403) can effectively lift the drawer plate (202) when rotating.

8. A large shelf rack according to claim 7, characterized in that, The support mechanism (400) further includes a track block (404) fixedly installed on the lower end of the assembly plate (301), a groove opened on the surface of the track block (404), a second spur rack (405) slidably fitted on the inner wall of the groove, a second spur gear (406) fixedly installed on the surface of the rotating shaft (401), and a pushing component provided on the back of the track block (404), wherein the second spur gear (406) meshes with the second spur rack (405) for transmission.

9. A large shelf rack according to claim 8, characterized in that, The pushing component includes a through hole on the back of the track block (404), a push rod (407) that slides on the inner wall of the through hole, a stop block (408) that is fixedly installed on the back of the push rod (407), a return spring (409) that is sleeved on the surface of the push rod (407), and a push plate (410) that is symmetrically fixedly installed on the lower surface of the drawer plate (202).

10. A large shelf rack according to claim 9, characterized in that, The two ends of the reset spring (409) abut against the opposite surfaces of the stop block (408) and the track block (404), and the push plate (410) and the stop block (408) are on the same axis, ensuring that the push plate (410) can accurately push the stop block (408) when it moves.

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