Reciprocating type vertical lifting device

Abstract

The invention relates to the technical field of mechanical engineering, in particular to a reciprocating type vertical lifting device.Two stand columns are fixedly connected to the top of a rail car, ejector rods are fixedly connected to the tops of the stand columns, a dynamic lifting mechanism is fixedly connected to the side faces of the stand columns, and a fixed side plate is arranged in the middle of the dynamic lifting mechanism; winding drums are arranged on the side faces of the two sides of the fixing side plate, a bearing mechanism is arranged in the middles of the two stand columns, a bearing table is arranged in the middle of the bearing mechanism, a balance mechanism is arranged at the bottom of the bearing mechanism, a balance base is arranged in the middle of the balance mechanism, and a balancing weight fixing base is arranged at the bottom of the balance base; a deceleration block is arranged on the side face of the balance mechanism, capsizing moment generated by goods deviation and position is counteracted, the deviation problem of the bearing mechanism is solved, friction between the bearing mechanism and the stand column guide rail is reduced, the stress of the root of the stand column is reduced, and the maintenance period is prolonged.

Description

Technical Field

[0001] This invention relates to the field of mechanical engineering technology, and more specifically to a reciprocating vertical lifting device. Background Technology

[0002] Reciprocating vertical lifting devices are widely used in the field of automated warehousing and logistics, greatly improving the storage density and inbound / outbound efficiency of warehouses, and playing an important role in realizing intelligent warehouse management.

[0003] The main structure of a stacker crane typically includes a mechanical body consisting of a traveling mechanism, a lifting mechanism, and a fork mechanism, enabling three-dimensional positioning and retrieval of goods within the aisle; a drive system; a control system; and a loading / retrieving execution mechanism. The forks can be configured with single-deep, double-deep, or multi-deep forks depending on the type of goods. All parts work together to complete core warehousing operations such as automated storage and retrieval of goods, in-warehouse handling, and precise stacking of high-rise racks. It features high speed, high precision, and automation. However, the above-mentioned working method still has the following shortcomings: 1. Existing counterweight systems mostly use fixed mass blocks connected by simple pulley systems, which cannot adjust the weight and position distribution according to the goods. 1. Dynamic adjustment is not possible, especially when the goods shift position on the loading platform, the fixed counterweight cannot effectively counteract the resulting overturning moment; 2. Existing mechanical synchronization systems mainly use rigid connecting shafts or gearboxes for flow distribution, but cannot achieve dynamic correction during operation. When one side slips slightly or elongates, the error will continue to accumulate until manual intervention is required. The electronic control system attempts to detect the deviation through encoders, but the correction process requires stopping the machine for fine-tuning, affecting the continuity of operation; 3. When the goods shift position on the loading platform and exceed the adjustment limit of the counterweight system, the existing emergency braking device is controlled by multiple sets of electric power, which limits the stability of the braking system and results in a long response time. Summary of the Invention

[0004] In order to overcome the above-mentioned defects of the prior art, the present invention provides a reciprocating vertical lifting device to solve the problems existing in the background art.

[0005] This invention provides the following technical solution: a reciprocating vertical lifting device, wherein two columns are fixedly connected to the top of the track vehicle, a top rod is fixedly connected to the top of each column, a dynamic lifting mechanism is fixedly connected to the side of each column, a fixed side plate is provided in the middle of the dynamic lifting mechanism, and winding drums are provided on both sides of the fixed side plate; a bearing mechanism is provided in the middle of the two columns, a bearing platform is provided in the middle of the bearing mechanism, a balancing mechanism is provided at the bottom of the bearing mechanism, a balancing base is provided in the middle of the balancing mechanism, a counterweight fixing seat is provided at the bottom of the balancing base, and a deceleration block is provided on the side of the balancing mechanism.

[0006] Furthermore, a lifting guide rail is fixedly connected to the front side of the column, and a pulley is provided inside the top rod. The two lifting guide rails are distributed on both sides of the column.

[0007] Furthermore, a differential housing is fixedly connected to the left side of the fixed side plate, cable reels are provided on both sides of the differential housing, a lifting motor is fixedly connected to the top of the differential housing, a keyway sleeve is fixedly connected to the middle of the differential housing, a reduction disc is provided on the left side of the keyway sleeve, and a friction disc is provided on the left side of the reduction disc.

[0008] Furthermore, a fixing ring is fixedly connected inside the winding drum, and four pendulum slots are opened inside the fixing ring. A pendulum connecting rod is arranged inside the four pendulum slots, and a pendulum is fixedly connected to the side of the pendulum connecting rod. A slip ring is arranged in the middle of the reduction disc, and four driven pins are arranged inside the slip ring. Five disc springs are fixedly connected to the left side of the reduction disc, and a friction block base is fixedly connected to the left side of the disc springs. Four friction blocks are fixedly connected to the side of the friction block base, and an output shaft is fixedly connected to the middle of the friction disc.

[0009] Furthermore, the bearing platform is equipped with a load-bearing plate inside, and two cargo guide rails are provided on the top of the load-bearing plate. Eight guide wheels are fixedly connected to both sides of the bearing platform, and a counterweight is provided at the bottom of the counterweight fixing seat. There are two counterweight fixing seats.

[0010] Furthermore, the front side of the balance base is provided with a counterweight guide rail, the bottom sides of the balance base are provided with four linkage slots, the middle of two linkage slots is provided with a return guide slot, the middle of the balance base is provided with a counterweight guide slot, the bottom sides of the balance base are provided with counterweight limiting blocks, the bottom of the deceleration block is provided with a deceleration block return bar, the bottom of the load plate is fixedly connected with two transmission rods, the bottom four corners of the load plate are fixedly connected with four support springs, the middle of the counterweight guide slot is provided with a driven rack, and the inside of the balance base is fixedly connected with a middle fixing plate, the middle of the middle fixing plate is provided with a linkage slot.

[0011] Furthermore, a linkage rack is provided inside the linkage groove, two limiting springs are provided on both sides of the linkage rack, a drive gear is provided on both sides of the middle fixed plate, an intermediate gear is fixedly connected to the bottom of the drive gear, a driven gear is provided on the side of the driven rack, and two connecting seats are fixedly connected to the bottom of the load plate.

[0012] Furthermore, the balance base has deceleration mechanisms on both sides, a compression spring in the middle of the deceleration mechanism, a deceleration block connecting seat fixedly connected to the end of the compression spring, a deceleration block fixedly connected to the side of the deceleration block connecting seat, two connecting seat fixing rods in the middle of both sides of the deceleration mechanism, a trigger rod fixedly connected to the end of the connecting seat fixing rod, and a brake lever on the side of the trigger rod.

[0013] The technical effects and advantages of this invention are as follows: This invention features a balancing mechanism at the bottom of the load-bearing mechanism, which automatically adjusts the counterweight at the bottom of the balancing mechanism as the cargo shifts. A connecting seat at the bottom of the load-bearing plate allows the load-bearing plate to tilt according to the cargo's shift, thus providing a visual feedback of the cargo's position and weight on the load-bearing mechanism. Subsequently, through a gear system, the position of the counterweight at the bottom of the balancing mechanism is automatically adjusted to counteract the overturning moment caused by the cargo's shift and position. This helps solve the problem of load-bearing mechanism shift, reduces friction between the load-bearing mechanism and the column guide rail, lowers the stress at the column base, and extends the maintenance cycle.

[0014] This invention incorporates a differential gearbox within a dynamic lifting mechanism. Through the differential action of the gearbox, the rotation of the two winding drums on both sides can be adjusted according to the load. Furthermore, by installing a dynamic adjustment device inside the winding drums, automatic speed adjustment is performed when the rotation speeds of the two winding drums differ. This achieves dynamic correction during equipment operation, which improves the dynamic adaptability of the device, ensures continuous operation, reduces downtime, and increases equipment efficiency.

[0015] This invention provides a deceleration block on the side of the balancing mechanism. When the movement of the counterweight at the bottom of the balancing mechanism cannot offset the deviation of the goods, the movement of the counterweight triggers the movement of the deceleration block, thereby limiting the load-bearing mechanism, ensuring the stability of the device, preventing overturning caused by the deviation of the goods, and improving the safety of the equipment. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0017] Figure 2 This is a partial cross-sectional structural diagram of the lifting mechanism of the present invention.

[0018] Figure 3 This is a cross-sectional structural diagram of the cable reel of the present invention.

[0019] Figure 4 This is a schematic diagram of the structure of the support platform of the present invention.

[0020] Figure 5This is a schematic diagram of the bottom structure of the support platform of the present invention.

[0021] Figure 6 This is a partial cross-sectional structural diagram of the support platform of the present invention.

[0022] Figure 7 For the present invention Figure 6 Schematic diagram of the structure at point A.

[0023] Figure 8 For the present invention Figure 6 Schematic diagram of the structure at point B.

[0024] The attached figures are labeled as follows: 1. Railcar; 11. Column; 111. Lifting guide rail; 12. Top rod; 121. Pulley; 2. Dynamic lifting mechanism; 21. Fixed side plate; 211. Differential gearbox; 212. Lifting motor; 22. Winding drum; 221. Output shaft; 23. Fixed ring; 231. Pendulum slot; 232. Pendulum connecting rod; 233. Pendulum; 24. Slip ring; 241. Driven column; 25. Reducer; 251. Keyway sleeve; 252. Disc spring; 26. Friction block base; 261. Friction block; 27. Friction disc; 3. Bearing mechanism; 31. Bearing platform; 32. Load plate; 321. Transmission rod; 322. Connecting seat; 323. Support spring; 33. Cargo guide rail; 34. Guide wheel; 4. Balancing mechanism; 41. Balancing base; 411. Counterweight guide rail; 412. Linkage groove; 413. Counterweight guide groove; 414. Driven rack; 415. Driven gear; 416. Intermediate gear; 417. Return guide groove; 42. Counterweight block fixing seat; 421. Counterweight block; 43. Middle layer fixing plate; 431. Linkage rack; 432. Limiting spring; 433. Drive gear; 44. Reduction mechanism; 441. Compression spring; 45. Reduction block connecting seat; 451. Connecting seat fixing rod; 452. Trigger rod; 453. Reduction block; 454. Reduction block return bar; 46. Counterweight limiting block; 461. Brake lever. Detailed Implementation

[0025] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. In addition, the forms of the various structures described in the following embodiments are merely illustrative. The reciprocating vertical lifting device involved in the present invention is not limited to the structures described in the following embodiments. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0026] Reference Figure 1 and Figure 4This invention provides a reciprocating vertical lifting device. The top of the railcar 1 is fixedly connected to two columns 11, and the top of the columns 11 is fixedly connected to a top rod 12. The side of the columns 11 is fixedly connected to a dynamic lifting mechanism 2. The dynamic lifting mechanism 2 is provided with a fixed side plate 21 in the middle. The two sides of the fixed side plate 21 are provided with a winding drum 22. The middle of the two columns 11 is provided with a bearing mechanism 3. The middle of the bearing mechanism 3 is provided with a bearing platform 31. The bottom of the bearing mechanism 3 is provided with a balancing mechanism 4. The middle of the balancing mechanism 4 is provided with a balancing base 41. The bottom of the balancing base 41 is provided with a counterweight fixing seat 42. The side of the balancing mechanism 4 is provided with a deceleration block 453.

[0027] By setting a dynamic lifting mechanism 2 on the side of the stacker crane, the rotation speed of the two winding drums 22 can be dynamically adjusted during the lifting process. The balancing mechanism 4 at the bottom of the bearing mechanism 3 enables the device to make rapid adjustments based on the position and weight of the goods on top of the bearing mechanism 3. The position change of the counterweight fixing seat 42 eliminates the offset problem of the bearing mechanism 3. The deceleration block 453 set on the side of the balancing mechanism 4 enables the bearing mechanism 3 to react quickly to extreme situations, thereby protecting the bearing mechanism 3 and preventing the device from tipping over.

[0028] Reference Figure 1 The front side of the column 11 is fixedly connected to the lifting guide rail 111, and the top rod 12 is equipped with a pulley 121. The two lifting guide rails 111 are distributed on both sides of the column 11, and the two columns 11 provide motion guidance and restriction for the bearing mechanism 3.

[0029] Reference Figure 2 A differential housing 211 is fixedly connected to the left side of the fixed side plate 21. Cable reels 22 are provided on both sides of the differential housing 211. A lifting motor 212 is fixedly connected to the top of the differential housing 211. A keyway sleeve 251 is fixedly connected to the middle of the differential housing 211. A reduction disc 25 is provided on the left side of the keyway sleeve 251. A friction disc 27 is provided on the left side of the reduction disc 25.

[0030] By adding a differential box 211 to the dynamic lifting mechanism 2, the two spools 22 on both sides can achieve different speeds according to the operating conditions. Specifically, when the load on one spool 22 is reduced relative to the other spool 22 due to slippage or wire elongation, the differential box 211 causes the speed of the other spool 22 to decrease, while the speed of the spool 22 on this side increases, thus adapting to this situation.

[0031] Reference Figure 3A fixed ring 23 is fixedly connected inside the winding drum 22. The fixed ring 23 has four pendulum slots 231 inside. A pendulum connecting rod 232 is set inside the four pendulum slots 231. A pendulum 233 is fixedly connected to the side of the pendulum connecting rod 232. A slip ring 24 is set in the middle of the reduction disc 25. Four driven columns 241 are set inside the slip ring 24. Five disc springs 252 are fixedly connected to the left side of the reduction disc 25. A friction block base 26 is fixedly connected to the left side of the disc springs 252. Four friction blocks 261 are fixedly connected to the side of the friction block base 26. An output shaft 221 is fixedly connected to the middle of the friction disc 27.

[0032] When the rotational speed of the spool 22 on this side increases, the spool 22 drives the internal fixed ring 23 to rotate. Then, under the action of centrifugal force, the pendulum connecting rod 232 drives the slip ring 24 to push the reduction disc 25 to move away from the keyway sleeve 251. At the same time, since the keyway sleeve 251 is fixed to the side of the differential box 211, the rotation of the reduction disc 25 is restricted by the keyway. This enables the four friction blocks 261 to rub against the friction disc 27, so that the spool 22 can decelerate back to the same speed as the spool 22 on the other side while adapting to special conditions. This completes the dynamic adjustment and makes the rotational speed of the spools 22 on both sides the same.

[0033] Reference Figure 4 The support platform 31 is equipped with a load plate 32 inside. The top of the load plate 32 is equipped with two cargo guide rails 33. Eight guide wheels 34 are fixedly connected to both sides of the support platform 31. The bottom of the counterweight block fixing seat 42 is equipped with a counterweight block 421. There are two counterweight block fixing seats 42.

[0034] Reference Figure 5 and Figure 6 The balance base 41 has a counterweight guide rail 411 on its front side, four linkage slots 412 on both sides of its bottom, a return guide slot 417 in the middle of two linkage slots 412, a counterweight guide slot 413 in the middle of the balance base 41, counterweight limiting blocks 46 on both sides of the bottom of the balance base 41, a deceleration block return bar 454 below the deceleration block 453, two transmission rods 321 fixedly connected to the bottom of the load plate 32, four support springs 323 fixedly connected to the four corners of the bottom of the load plate 32, a driven rack 414 in the middle of the counterweight guide slot 413, and a middle fixed plate 43 fixedly connected inside the balance base 41. The middle fixed plate 43 has a linkage slot 434 in the middle. Through the action of the deceleration block return bar 454, the deceleration block 453 can return to its initial position after being triggered, thereby completing the subsequent protection work.

[0035] The counterweight guide rail 411 guides and restricts the movement of the counterweight block fixing seat 42. By adjusting and replacing the counterweight block 421 at the bottom of the counterweight block fixing seat 42, the device can be adjusted according to the usage. The four support springs 323 fixedly connected at the four corners of the bottom of the load plate 32 ensure that the load plate 32 is in a balanced horizontal position when there is no cargo on it, and at the same time plays a certain role in buffering.

[0036] Reference Figure 7 The linkage groove 434 is equipped with a linkage rack 431, and two limit springs 432 are provided on both sides of the linkage rack 431. The middle fixed plate 43 is equipped with a drive gear 433 on both sides, and an intermediate gear 416 is fixedly connected to the bottom of the drive gear 433. The driven rack 414 is equipped with a driven gear 415 on its side, and two connecting seats 322 are fixedly connected to the bottom of the load plate 32.

[0037] The offset of the goods on the load plate 32 causes the transmission rod 321 on one side of the load plate 32 to move downward, which in turn causes the linkage rack 431 to move to the other side, thereby pushing the driving gear 433 on the other side. Under the combined action of the intermediate gear 416 and the driven gear 415, the counterweight block fixing seat 42 away from the heavy load side moves in the direction away from the heavy load side, thereby realizing the linkage adjustment of the counterweight.

[0038] Reference Figure 8 and Figure 5 The balance base 41 has a deceleration mechanism 44 on both sides. A compression spring 441 is provided in the middle of the deceleration mechanism 44. A deceleration block connecting seat 45 is fixedly connected to the end of the compression spring 441. A deceleration block 453 is fixedly connected to the side of the deceleration block connecting seat 45. Two connecting seat fixing rods 451 are provided in the middle of both sides of the deceleration mechanism 44. A trigger rod 452 is fixedly connected to the end of the connecting seat fixing rod 451. A brake lever 461 is provided on the side of the trigger rod 452.

[0039] When the counterweight fixing seat 42 moves to its maximum position and still cannot adjust the offset problem, the side of the counterweight fixing seat 42 will push the counterweight limiting block 46 at the bottom of the balance base 41, and then release the compression spring 441 under the action of the brake lever 461, thereby pushing the deceleration block 453 out quickly and close to the side of the column 11 to achieve deceleration protection and prevent overturning caused by offset operation.

[0040] The working principle of this invention: During the counterweight adjustment stage, when there is no cargo on the cargo guide rail 33, the load plate 32 is horizontally positioned by the support of the four support springs 323 at the bottom of the load plate 32. At this time, the linkage rack 431 below the load plate 32 is in the middle position, and under the action of the gear and rack, the two counterweight fixing seats 42 at the bottom of the balance mechanism 4 are in the middle position. At this time, the bearing mechanism 3 is in a balanced state. When cargo is loaded on the cargo guide rail 33, or when the cargo shifts, the load plate 32 deflects around the connecting seat 322 under its action. Under the deflection action, one The transmission rod 321 on one side moves downward, and the transmission rod 321 on the other side moves upward. The downward-moving transmission rod 321 pushes the linkage rack 431 to move horizontally. Under the lateral movement of the linkage rack 431, the driving gear 433 on the other side of the transmission rod 321 transmits the lateral movement to the driven rack 414 through the gear system. Then, under the drive of the driven rack 414, the counterweight block fixing seat 42 below the transmission rod 321 on the other side drives the counterweight block 421 at its bottom to move to the other side, thereby realizing the dynamic adjustment of the counterweight block. Through purely mechanical adjustment, the gravity distribution on both sides of the bearing mechanism 3 is balanced.

[0041] During the overload protection process, if the load-bearing mechanism 3 cannot be balanced by adjusting the movement of the counterweight fixing seat 42, the counterweight fixing seat 42 drives the counterweight 421 to move to the side of the balancing mechanism 4. This eventually pushes the counterweight limiting block 46 at the bottom of the balancing base 41 to move, causing the brake lever 461 at the top of the counterweight limiting block 46 to move. Under the action of the inclined plane, the trigger lever 452 is released from the restriction. Subsequently, under the action of the compression spring 441, the deceleration block connecting seat 45 quickly pushes the deceleration block 453 to extend. Under the combined action of the deceleration block 453 and the column 11, the load-bearing mechanism 3 is protected, allowing the machine to be stopped and the cargo adjusted. By pushing the deceleration block return bar 454 to compress the compression spring 441, the overload protection is reset.

[0042] The dynamic correction process involves adding a differential gearbox 211 to the dynamic lifting mechanism 2 to dynamically adjust the output power of the lifting motor 212. When the load on one side of the winding drum 22 decreases due to cargo offset or slippage, the differential gearbox 211 can provide some compensation. Simultaneously, when the two winding drums 22 rotate at different speeds, the winding drum 22 on the side with the faster speed drives the pendulum 233 inside to rotate faster. Under the action of centrifugal force, the pendulum 233 moves away from the axis, thereby causing the pendulum connecting rod 232 to push the slip ring 24 towards the friction disc 27. Finally, the reduction disc 25 pushes the friction block 261 at its front to press against the friction disc 27, thus completing the deceleration of the winding drum 22 until the two winding drums 22 rotate synchronously, achieving the dynamic correction process.

[0043] Secondly: The accompanying drawings of the embodiments disclosed in this invention only involve the structures involved in the embodiments disclosed in this invention. Other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of this invention can be combined with each other. In conclusion, the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A reciprocating vertical lifting device, comprising a railcar (1), characterized in that: The top of the railcar (1) is fixedly connected to two columns (11), the top of the columns (11) is fixedly connected to a top rod (12), the side of the columns (11) is fixedly connected to a dynamic lifting mechanism (2), the middle of the dynamic lifting mechanism (2) is provided with a fixed side plate (21), the two sides of the fixed side plate (21) are provided with a winding drum (22), the middle of the two columns (11) is provided with a bearing mechanism (3), the middle of the bearing mechanism (3) is provided with a bearing platform (31), the bottom of the bearing mechanism (3) is provided with a balancing mechanism (4), the middle of the balancing mechanism (4) is provided with a balancing base (41), the bottom of the balancing base (41) is provided with a counterweight fixing seat (42), and the side of the balancing mechanism (4) is provided with a deceleration block (453).

2. The reciprocating vertical lifting device according to claim 1, characterized in that: The front side of the column (11) is fixedly connected to a lifting guide rail (111), and the top rod (12) is provided with a pulley (121). The two lifting guide rails (111) are distributed on both sides of the column (11).

3. The reciprocating vertical lifting device according to claim 1, characterized in that: A differential housing (211) is fixedly connected to the left side of the fixed side plate (21). A winding drum (22) is provided on both sides of the differential housing (211). A lifting motor (212) is fixedly connected to the top of the differential housing (211). A keyway sleeve (251) is fixedly connected to the middle of the differential housing (211). A reduction disc (25) is provided on the left side of the keyway sleeve (251). A friction disc (27) is provided on the left side of the reduction disc (25).

4. The reciprocating vertical lifting device according to claim 3, characterized in that: The winding drum (22) is fixedly connected to a fixed ring (23). The fixed ring (23) has four pendulum slots (231) inside. The four pendulum slots (231) are provided with pendulum connecting rods (232). The pendulum connecting rods (232) are fixedly connected to the sides with pendulums (233). The speed reducer (25) is provided with a slip ring (24) in the middle. The slip ring (24) is provided with four driven columns (241) inside. The speed reducer (25) is fixedly connected with five disc springs (252) on the left side. The disc springs (252) are fixedly connected with a friction block base (26) on the left side. The friction block base (26) is fixedly connected with four friction blocks (261) on the side. The friction disc (27) is fixedly connected with an output shaft (221) in the middle.

5. A reciprocating vertical lifting device according to claim 1, characterized in that: The bearing platform (31) is equipped with a load plate (32) inside. The top of the load plate (32) is equipped with two cargo guide rails (33). Eight guide wheels (34) are fixedly connected to both sides of the bearing platform (31). The bottom of the counterweight block fixing seat (42) is equipped with a counterweight block (421). There are two counterweight block fixing seats (42).

6. A reciprocating vertical lifting device according to claim 5, characterized in that: The front side of the balance base (41) is provided with a counterweight guide rail (411). The bottom sides of the balance base (41) are provided with four linkage grooves (412). The middle of the two linkage grooves (412) is provided with a return guide groove (417). The middle of the balance base (41) is provided with a counterweight guide groove (413). The bottom sides of the balance base (41) are provided with counterweight limiting blocks (46). The deceleration block (453) is provided with a deceleration block return bar (454) below it. The bottom of the load plate (32) is fixedly connected with two transmission rods (321). The bottom corners of the load plate (32) are fixedly connected with four support springs (323). The middle of the counterweight guide groove (413) is provided with a driven rack (414). The inside of the balance base (41) is fixedly connected with a middle layer fixing plate (43). The middle of the middle layer fixing plate (43) is provided with a linkage groove (434).

7. A reciprocating vertical lifting device according to claim 6, characterized in that: The linkage groove (434) is provided with a linkage rack (431) inside. Two limit springs (432) are provided on both sides of the linkage rack (431). The middle layer fixing plate (43) is provided with a drive gear (433) on both sides. An intermediate gear (416) is fixedly connected to the bottom of the drive gear (433). A driven gear (415) is provided on the side of the driven rack (414). Two connecting seats (322) are fixedly connected to the bottom of the load plate (32).

8. A reciprocating vertical lifting device according to claim 1, characterized in that: The balance base (41) has a deceleration mechanism (44) on both sides. A compression spring (441) is provided in the middle of the deceleration mechanism (44). A deceleration block connecting seat (45) is fixedly connected to the end of the compression spring (441). A deceleration block (453) is fixedly connected to the side of the deceleration block connecting seat (45). Two connecting seat fixing rods (451) are provided in the middle of both sides of the deceleration mechanism (44). A trigger rod (452) is fixedly connected to the end of the connecting seat fixing rod (451). A brake lever (461) is provided on the side of the trigger rod (452).

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