Four-drive servo elevator

Abstract

The utility model relates to the technical field of elevators, in particular to a four-drive servo elevator. The device comprises a mounting frame, a lifting sliding frame and a lifting mechanism are arranged in the mounting frame, the lifting mechanism is connected with the lifting sliding frame, and the lifting mechanism comprises four servo driving assemblies arranged at the four corners of the lifting sliding frame and chain counterweight assemblies arranged on the left side and the right side of the lifting sliding frame. The servo driving assembly can provide driving force for vertical lifting motion of the lifting sliding frame, and the chain counterweight assembly can provide counterweight balance when the lifting sliding frame lifts up and down. And a horizontal conveying mechanism is arranged on the lifting sliding frame. According to the utility model, the servo driving component is matched with the chain counterweight component, so that the lifting of the lifting carriage can be accurately controlled to stop, the accurate positioning and butt joint of the four-way pallet truck and the goods shelf track can be realized, the jamming phenomenon when the four-way pallet truck enters and exits from the goods shelf track is avoided, the smooth work of the four-way pallet truck is ensured, and the operation noise is low.

Description

Technical Field

[0001] This utility model relates to the field of lifting platform technology, and in particular to a four-drive servo lifting platform. Background Technology

[0002] A reciprocating lift is a device used for the reciprocating transport of goods. It typically uses an electric motor as its power source, driving a lifting car or bucket to rise or fall along guide rails via a chain or belt transmission device. When the lifting car or bucket reaches its top or bottom limit, the motor stops, completing one transport cycle. This allows for rapid vertical transport of goods. With the rapid development of four-way pallet shuttle automated storage and retrieval systems (AS / RS), reciprocating lifts are widely used in AS / RS, primarily for the back-and-forth movement of four-way pallet trucks from one rack level to another.

[0003] In existing technologies, reciprocating lifts cannot achieve precise docking with each layer of rack rails, and height differences are prone to occur at each docking point. This causes four-way pallet trucks to get stuck when changing layers between each layer in the automated warehouse. Long-term use causes the wheels of the four-way pallet trucks to wear out particularly easily, resulting in the four-way pallet trucks failing to work properly. Utility Model Content

[0004] This application addresses the shortcomings of existing production technologies by providing a four-drive servo lift that enables four-way pallet trucks to quickly change floors between each level in an automated warehouse. It also enables precise positioning and docking of the four-way pallet truck with the racking track, preventing jamming when the four-way pallet truck enters or exits the racking track and ensuring smooth operation of the four-way pallet truck.

[0005] The technical solution adopted in this utility model is as follows:

[0006] A four-drive servo lifting platform includes a mounting frame, within which a lifting carriage and a lifting mechanism are installed. The lifting mechanism is connected to the lifting carriage. The lifting mechanism includes four sets of servo drive components located at the four corners of the lifting carriage and chain counterweight components located on the left and right sides of the lifting carriage. The servo drive components provide the driving force for the lifting carriage to move up and down, and the chain counterweight components provide counterweight balance when the lifting carriage moves up and down. A horizontal conveying mechanism is installed on the lifting carriage to realize horizontal conveying.

[0007] Furthermore, the installation frame includes four vertically arranged columns, with a top frame welded together at the top of the four columns and a bottom frame welded together at the bottom of the four columns. Multiple second horizontal bars are set on the left and right sides of the installation frame, distributed along the height direction. The two ends of the second horizontal bars are respectively bolted to the two columns. Multiple first horizontal bars are set on the front and rear sides of the installation frame, distributed along the height direction. The two ends of the first horizontal bars are respectively bolted to the two columns.

[0008] Furthermore, protective nets are installed on both the left and right sides of the installation frame to cover the lifting mechanism and protect it.

[0009] Furthermore, the protective netting includes rectangular mesh panels, with side mounting plates welded to the left and right sides of the mesh panels, and the side mounting plates are detachably connected to the posts by bolts.

[0010] Furthermore, the servo drive assembly includes a servo motor fixed on the lifting carriage, the drive end of the servo motor is connected to the input end of the reducer, the output end of the reducer is connected to a gear, the gear and rack are meshed, and the rack is vertically fixed on the column.

[0011] Furthermore, the chain counterweight assembly includes two first chains, two second chains, and a counterweight assembly. One end of each of the two first chains is threaded onto two first chain supports, which are welded to the left side of the lifting carriage. The other end of each of the two first chains is welded to the counterweight assembly after spanning the entire mounting frame above the frame. One end of each of the two second chains is threaded onto two second chain supports, which are welded to the right side of the lifting carriage. The other end of each of the two second chains is welded to the counterweight assembly. First sprocket shafts and second sprocket shafts are respectively installed on the left and right sides of the top of the top frame. First bearing seats are connected to both ends of the first sprocket shafts and are fixed to the top frame. Two first sprockets are connected to the first sprocket shafts. Second bearing seats are connected to both ends of the second sprocket shafts and are fixed to the top frame. Two second sprockets and two third sprockets are connected to the second sprocket shafts. The cross section of the first chain is sequentially connected to the first and third sprockets, and the second chain is connected to the second sprockets.

[0012] Furthermore, the counterweight assembly includes a counterweight frame, with an installation cavity inside the counterweight frame capable of accommodating multiple counterweights. Multiple counterweights are placed inside the installation cavity. Two counterweight guide wheels are respectively provided on the left and right sides of the counterweight frame. Two counterweight slide rails are vertically fixed on the installation frame, and the counterweight guide wheels on the left and right sides of the counterweight frame are slidably connected to the two counterweight slide rails respectively.

[0013] Furthermore, a lifting guide pulley is set at each of the four corners of the lifting carriage, the four columns are H-shaped steel sections, the four lifting guide pulleys are slidably connected in the grooves of the four columns, and two parallel four-way trolley guide rails are set inside the lifting carriage, allowing the four-way pallet trolley to enter and exit the lifting carriage along the four-way trolley guide rails.

[0014] Furthermore, the horizontal conveying mechanism includes a drive motor fixed to the bottom of the lifting carriage. The drive end of the drive motor is connected to a transmission shaft via a sprocket and chain assembly. Bearing seats are connected to both ends of the transmission shaft, and the bearing seats are fixed to the lifting carriage. A drive sprocket is connected to each end of the transmission shaft, and a conveying chain is mounted on each drive sprocket. The inner end face of the drive sprocket and the conveying chain is connected. The conveying chain is laid on a conveying chain mounting frame to form a conveying end face. The conveying chain mounting frame is fixed to the lifting carriage. A transmission sprocket shaft is connected to the front and rear ends of the conveying chain mounting frame via bearings, and a transmission sprocket is connected to the transmission sprocket shaft. The conveyor chain is respectively fitted onto the drive sprockets at the front and rear ends of the conveyor chain mounting frame. The drive sprockets are connected to the inner end face of the conveyor chain. Two tensioning supports are bolted to the lower part of the conveyor chain mounting frame. A long strip-shaped adjustment groove is provided on the conveyor chain mounting frame at the position where the tensioning supports are connected. The bolts that fix the tensioning supports are connected to the adjustment groove. The tensioning supports are rotatably connected to the tensioning sprockets through the rotating shaft. The tensioning sprockets are connected to the outer end face of the conveyor chain. Chain baffles are respectively provided on the left and right sides of the conveyor chain. The chain baffles are bolted to the side of the conveyor chain mounting frame. Limiting baffles are connected to the outer side of the conveyor chain mounting frame.

[0015] Furthermore, a photoelectric sensor is installed at each of the four corners of the horizontal conveying mechanism.

[0016] The beneficial effects of this utility model are as follows:

[0017] This invention employs a servo drive assembly in conjunction with a chain counterweight assembly, enabling precise control of the lifting and stopping of the lifting carriage. It achieves accurate positioning and docking of the four-way pallet trolley with the rack track, preventing jamming when the trolley enters or exits the track and ensuring smooth operation with low noise. The protective netting protects both the lifting mechanism and the workers. The horizontal conveying mechanism accurately transports goods horizontally, and photoelectric sensors on the mechanism detect whether the goods are in place. Attached Figure Description

[0018] Figure 1 This is a perspective view of the present invention.

[0019] Figure 2 This is a perspective view of the present invention with the protective netting on both sides removed.

[0020] Figure 3This is a front perspective view of the lifting mechanism of this utility model.

[0021] Figure 4 This is a perspective view of the rear of the lifting mechanism of this utility model.

[0022] Figure 5 This is a front perspective view of the horizontal conveying mechanism of this utility model.

[0023] Figure 6 This is a perspective view of the rear of the horizontal conveying mechanism of this utility model.

[0024] Figure 7 This is an assembly structure diagram of the conveyor chain of this utility model.

[0025] The components are as follows: 100, mounting frame; 110, column; 111, first horizontal bar; 112, second horizontal bar; 120, bottom frame; 130, top frame; 200, protective net; 210, side mounting plate; 220, mesh plate; 300, lifting slide; 310, lifting guide pulley; 320, four-way vehicle guide rail; 400, horizontal conveying mechanism; 401, drive motor; 402, sprocket and chain assembly; 403, drive shaft; 404, conveyor chain; 405, conveyor chain mounting frame; 406, transmission chain. 407. Drive sprocket; 408. Tension sprocket; 409. Chain baffle; 410. Limit baffle; 500. Lifting mechanism; 501. Servo motor; 502. Gear; 503. Rack; 504. First chain; 505. First chain support; 506. First sprocket shaft; 507. Second sprocket shaft; 508. Second chain; 509. Second chain support; 510. Counterweight frame; 511. Counterweight block; 512. Counterweight guide wheel; 513. Counterweight slide rail; 600. Photoelectric sensor. Detailed Implementation

[0026] The specific embodiments of this utility model are described below with reference to the accompanying drawings.

[0027] like Figure 1 and Figure 2 As shown, the four-drive servo lift includes a vertically arranged mounting frame 100, a lifting slide 300 is arranged inside the mounting frame 100, and a lifting mechanism 500 is arranged on the mounting frame 100. The lifting mechanism 500 is connected to the lifting slide 300, and the lifting mechanism 500 can drive the lifting slide 300 to move up and down within the mounting frame 100.

[0028] like Figure 2As shown, the mounting frame 100 includes four vertically arranged columns 110. A top frame 130 is welded to the top of each of the four columns 110, and a bottom frame 120 is welded to the bottom of each of the four columns 110. Multiple second horizontal bars 112 are provided on the left and right sides of the mounting frame 100, distributed along the height direction. The two ends of each second horizontal bar 112 are bolted to two columns 110. Multiple first horizontal bars 111 are provided on the front and rear sides of the mounting frame 100, distributed along the height direction. The two ends of each first horizontal bar 111 are bolted to two columns 110.

[0029] like Figure 1 As shown, protective nets 200 are installed on the left and right sides of the installation frame 100. The protective nets 200 cover the lifting mechanism 500 connected to the installation frame 100, preventing external objects or people from entering the installation frame 100 and affecting the normal operation of the lifting mechanism 500. This provides protection for the lifting mechanism 500 and also protects the workers.

[0030] like Figure 1 As shown, the protective net 200 includes a rectangular mesh panel 220, with side mounting plates 210 welded to the left and right sides of the mesh panel 220 respectively. The side mounting plates 210 are detachably connected to the column 110 by bolts.

[0031] like Figure 2 and Figure 3 As shown, the lifting mechanism 500 includes four sets of servo drive assemblies connected to the four corners of the lifting carriage 300 and chain counterweight assemblies connected to the left and right sides of the lifting carriage 300. The servo drive assemblies provide the driving force for the lifting carriage 300 to move up and down, while the chain counterweight assemblies provide counterweight balance during the lifting of the carriage 300, maintaining smooth and stable lifting motion. The chain counterweight assemblies ensure that the motor outputs the same power under no-load and load conditions, thus protecting the motor.

[0032] like Figure 2 and Figure 3 As shown, the servo drive assembly includes a servo motor 501 fixed on the lifting slide 300. The drive end of the servo motor 501 is connected to the input end of a reducer, and the output end of the reducer is connected to a gear 502. The gear 502 and a rack 503 are meshed together, and the rack 503 is vertically fixed on the column 110. When the servo motor 501 is working, it can drive the gear 502 to rotate. The gear 502, through meshing with the rack 503, drives the lifting slide 300 to move up and down. The servo motor 501, in conjunction with the gear and rack structure, can achieve precise control of the lifting speed and position of the lifting slide 300.

[0033] like Figure 2 and Figure 3As shown, the chain counterweight assembly includes two first chains 504, two second chains 508, and a counterweight assembly. One end of each of the two first chains 504 is threaded onto two first chain supports 505, which are welded to the left side of the lifting carriage 300. The other end of each of the two first chains 504 is welded to the counterweight assembly above the mounting frame 100, spanning the entire mounting frame 100. One end of each of the two second chains 508 is threaded onto two second chain supports 509, which are welded to the right side of the lifting carriage 300. The other end of each of the two second chains 508 is welded to the counterweight assembly.

[0034] like Figure 2 and Figure 3 As shown, a first sprocket shaft 506 and a second sprocket shaft 507 are respectively installed on the left and right sides of the top of the top frame 130. The first sprocket shaft 506 is connected to a first bearing seat at both ends, and the first bearing seat is fixed to the top frame 130. Two first sprockets are connected to the first sprocket shaft 506. The second sprocket shaft 507 is connected to a second bearing seat at both ends, and the second bearing seat is fixed to the top frame 130. Two second sprockets and two third sprockets are connected to the second sprocket shaft 507. The cross section of the first chain 504 is sequentially connected to the first and third sprockets, and the second chain 508 is connected to the second sprockets.

[0035] like Figure 2 and Figure 3 As shown, the counterweight assembly includes a counterweight frame 510, within which a mounting cavity is provided to accommodate multiple counterweights 511. Depending on the specific application, multiple counterweights 511 are placed within the mounting cavity. Two counterweight guide wheels 512 are respectively provided on the left and right sides of the counterweight frame 510. Two counterweight slide rails 513 are vertically fixed on the mounting frame 100, and the counterweight guide wheels 512 on the left and right sides of the counterweight frame 510 are slidably connected to the two counterweight slide rails 513.

[0036] like Figure 1 and Figure 2 As shown, a lifting guide pulley 310 is provided at each of the four corners of the lifting carriage 300, and the four uprights 110 are H-shaped steel sections. The four lifting guide pulleys 310 are slidably connected to the grooves of the four uprights 110. Two parallel four-way trolley guide rails 320 are provided inside the lifting carriage 300, allowing the four-way pallet trolley to enter and exit the lifting carriage 300 along the four-way trolley guide rails 320.

[0037] like Figure 1 and Figure 2 As shown, a horizontal conveying mechanism 400 is provided on the lifting carriage 300, which can realize the horizontal conveying of goods.

[0038] like Figure 5 , Figure 6 and Figure 7 As shown, the horizontal conveying mechanism 400 includes a drive motor 401 fixed to the bottom of the lifting slide 300. The drive end of the drive motor 401 is connected to a transmission shaft 403 via a sprocket and chain assembly 402. Both ends of the transmission shaft 403 are connected to bearing seats, which are fixed to the lifting slide 300. Both ends of the transmission shaft 403 are connected to a drive sprocket 407. A conveying chain 404 is mounted on each drive sprocket 407. The inner end faces of the drive sprocket 407 and the conveying chain 404 are connected. The conveying chain 404 is laid on a conveying chain mounting frame 405 to form a conveying end face. The conveying chain mounting frame 405 is fixed to the lifting slide 300. The front and rear ends of the conveyor chain mounting frame 405 are each connected to a drive sprocket shaft 406 via bearings. Drive sprockets are connected to the drive sprocket shafts 406, and conveyor chains 404 are respectively fitted onto the drive sprockets at the front and rear ends of the conveyor chain mounting frame 405. The drive sprockets are connected to the inner end faces of the conveyor chains 404. Two tensioning supports are bolted to the lower part of the conveyor chain mounting frame 405. An elongated adjustment groove is provided on the conveyor chain mounting frame 405 at the location where the tensioning supports are connected. The bolts fixing the tensioning supports are connected to the adjustment groove, allowing the position of the tensioning supports to be adjusted. A tensioning sprocket 408 is rotatably connected to the tensioning support via a rotating shaft. The tensioning sprocket 408 is connected to the outer end face of the conveyor chain 404, achieving tensioning of the conveyor chain 404.

[0039] like Figure 5 and Figure 6 As shown, chain baffles 409 are respectively installed on the left and right sides of the conveyor chain 404. The chain baffles 409 are bolted to the sides of the conveyor chain mounting frame 405, and the chain baffles 409 can protect the sides of the conveyor chain 404. The outer side of the conveyor chain mounting frame 405 is connected to a limiting baffle 410, which can limit the left and right position of the four-way pallet cart on the horizontal conveyor mechanism 400, ensuring that the goods can smoothly enter and exit the horizontal conveyor mechanism 400.

[0040] like Figure 5 As shown, a photoelectric sensor 500 is installed at each of the four corners of the horizontal conveying mechanism 400. The photoelectric sensor 500 can detect whether the four-way shuttle conveyed by the horizontal conveying mechanism 400 has arrived at its destination.

[0041] The above description is an explanation of the present utility model and not a limitation thereof. The scope of the present utility model is defined by the claims. Within the protection scope of the present utility model, any form of modification may be made.

Claims

1. A four-drive servo lift, comprising a mounting frame (100), characterized in that: The mounting frame (100) is equipped with a lifting slide (300) and a lifting mechanism (500). The lifting mechanism (500) is connected to the lifting slide (300). The lifting mechanism (500) includes four sets of servo drive components at the four corners of the lifting slide (300) and chain counterweight components on the left and right sides of the lifting slide (300). The servo drive components can provide driving force for the lifting slide (300) to move up and down. The chain counterweight components can provide counterweight balance when the lifting slide (300) moves up and down. A horizontal conveying mechanism (400) is provided on the lifting slide (300). The horizontal conveying mechanism (400) can realize horizontal conveying work.

2. The four-drive servo lifting platform as described in claim 1, characterized in that: The mounting frame (100) includes four vertically arranged columns (110). The top of the four columns (110) is welded together with a top frame (130), and the bottom of the four columns (110) is welded together with a bottom frame (120). Multiple second crossbars (112) are respectively arranged on the left and right sides of the mounting frame (100). The multiple second crossbars (112) are distributed along the height direction. The two ends of the second crossbars (112) are respectively connected to the two columns (110) by bolts. Multiple first crossbars (111) are respectively arranged on the front and rear sides of the mounting frame (100). The multiple first crossbars (111) are distributed along the height direction. The two ends of the first crossbars (111) are respectively connected to the two columns (110) by bolts.

3. The four-drive servo lifting platform as described in claim 2, characterized in that: Protective nets (200) are respectively provided on the left and right sides of the installation frame (100). The protective nets (200) cover the lifting mechanism (500) and protect the lifting mechanism (500).

4. The four-drive servo lifting platform as described in claim 3, characterized in that: The protective net (200) includes a rectangular mesh panel (220), with side mounting plates (210) welded to the left and right sides of the mesh panel (220), and the side mounting plates (210) are detachably connected to the column (110) by bolts.

5. The four-drive servo lifting platform as described in claim 4, characterized in that: The servo drive assembly includes a servo motor (501) fixed on the lifting slide (300). The drive end of the servo motor (501) is connected to the input end of the reducer, and the output end of the reducer is connected to the gear (502). The gear (502) and the rack (503) are meshed and connected. The rack (503) is vertically fixed on the column (110).

6. The four-drive servo lifting platform as described in claim 5, characterized in that: The chain counterweight assembly includes two first chains (504), two second chains (508), and a counterweight assembly. One end of each of the two first chains (504) is threaded onto two first chain supports (505), which are welded to the left side of the lifting carriage (300). The other end of each of the two first chains (504) is welded to the counterweight assembly after crossing the entire mounting frame (100) above the mounting frame (100). One end of each of the two second chains (508) is threaded onto two second chain supports (509), which are welded to the right side of the lifting carriage (300). The other end of (508) is welded to the counterweight assembly. The top left and right sides of the top frame (130) are respectively provided with the first sprocket shaft (506) and the second sprocket shaft (507). The first sprocket shaft (506) is connected to the first bearing seat at both ends. The first bearing seat is fixed on the top frame (130). Two first sprockets are connected on the first sprocket shaft (506). The second sprocket shaft (507) is connected to the second bearing seat at both ends. The second bearing seat is fixed on the top frame (130). Two second sprockets and two third sprockets are connected on the second sprocket shaft (507). The cross section of the first chain (504) is connected to the first sprocket and the third sprocket in sequence. The second chain (508) is connected to the second sprocket.

7. The four-drive servo lifting platform as described in claim 6, characterized in that: The counterweight assembly includes a counterweight frame (510), and the counterweight frame (510) is provided with an installation cavity that can accommodate multiple counterweights (511). Multiple counterweights (511) are placed in the installation cavity. Two counterweight guide wheels (512) are respectively provided on the left and right sides of the counterweight frame (510). Two counterweight slide rails (513) are vertically fixed on the installation frame (100). The counterweight guide wheels (512) on the left and right sides of the counterweight frame (510) are slidably connected to the two counterweight slide rails (513).

8. The four-drive servo lifting platform as described in claim 7, characterized in that: The lifting slide (300) is provided with a lifting guide pulley (310) at each of its four corners. The four columns (110) are H-shaped steel sections. The four lifting guide pulleys (310) are slidably connected in the grooves of the four columns (110). The lifting slide (300) is provided with two parallel four-way vehicle guide rails (320). The four-way pallet truck can enter and exit the lifting slide (300) along the four-way vehicle guide rails (320).

9. The four-drive servo lifting platform as described in claim 8, characterized in that: The horizontal conveying mechanism (400) includes a drive motor (401) fixed to the bottom of the lifting slide (300). The drive end of the drive motor (401) is connected to a transmission shaft (403) via a sprocket and chain assembly (402). Both ends of the transmission shaft (403) are connected to bearing seats, which are fixed on the lifting slide (300). Both ends of the transmission shaft (403) are connected to a drive sprocket (407). A conveying chain (404) is fitted on each drive sprocket (407). The inner end faces of the drive sprocket (407) and the conveying chain (404) are connected. The conveying chain (404) is laid on a conveying chain mounting frame (405) to form a conveying end face. The conveying chain mounting frame (405) is fixed on the lifting slide (300). The front and rear ends of the conveying chain mounting frame (405) are respectively connected to a transmission sprocket shaft (406) via bearings. A drive sprocket is connected to the drive sprocket shaft (406). The conveyor chain (404) is respectively sleeved on the drive sprockets at the front and rear ends of the conveyor chain mounting frame (405). The drive sprocket is connected to the inner end face of the conveyor chain (404). Two tensioning supports are connected to the lower part of the conveyor chain mounting frame (405) by bolts. A long strip-shaped adjustment groove is provided at the position where the tensioning supports are connected on the conveyor chain mounting frame (405). The bolts that fix the tensioning supports are connected in the adjustment groove. The tensioning support is rotatably connected to the tensioning sprocket (408) through a rotating shaft. The tensioning sprocket (408) is connected to the outer end face of the conveyor chain (404). Chain baffles (409) are respectively provided on the left and right sides of the conveyor chain (404). The chain baffles (409) are connected to the side of the conveyor chain mounting frame (405) by bolts. The outer side of the conveyor chain mounting frame (405) is connected to the limiting baffle (410).

10. The four-drive servo lifting platform as described in claim 9, characterized in that: A photoelectric sensor (600) is installed at each of the four corners of the horizontal conveying mechanism (400).

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