High-precision built-in reciprocating type tray elevator

Abstract

The invention discloses a high-precision built-in reciprocating type tray elevator. The high-precision built-in reciprocating type tray elevator comprises a machine body, a feeding frame, a discharging frame, a first chain, a second chain, a synchronous transmission assembly, a plurality of tray frame mechanisms and a plurality of clamping mechanisms. The tray rack mechanism comprises a Z-shaped supporting arm, a pair of rotary connecting pieces, a transverse plate and a plurality of lifting arms. The two ends of the Z-shaped supporting arm are rotationally connected to the same positions of the first chain and the second chain correspondingly, so that the first chain and the second chain synchronously rotate, meanwhile, the Z-shaped supporting arm is always driven to be kept in the vertical state, and the Z-shaped supporting arm rotates along the track of the receding sliding groove, and therefore when the multiple lifting arms move along the track of the receding sliding groove, the Z-shaped supporting arm can stably move along the receding sliding groove. And the upper top surfaces of the plurality of lifting arms can be always kept in a horizontal state. In addition, when the multiple lifting arms drive the tray to be lifted up and down, the tray is automatically clamped on the multiple lifting arms through the clamping mechanism, and therefore the stability of the multiple lifting arms when the tray is lifted is improved.

Description

Technical Field

[0001] This invention belongs to the technical field of pallet lifting equipment, specifically relating to a high-precision built-in reciprocating pallet lifting machine. Background Technology

[0002] A hoist is a large mechanical device that transports goods by changing their potential energy. Examples include mine hoists and dam hoists. Broadly speaking, elevators, overhead cranes, winches, trolleys, cranes, and gate hoists can all be called hoists. Hoists generally refer to large mechanical devices with high power and strong lifting capacity. The transportation process is completed by using a power machine to drive a flexible steel wire rope and the transported goods up and down. Wire rope is an indispensable and important component of lifting machinery, and the main types include phosphated coated steel wire rope, galvanized steel wire rope, stainless steel wire rope, and bright steel wire rope, etc.

[0003] The high-precision reciprocating hoist improves the control accuracy of the servo motor by increasing the resolution of the servo motor encoder. It also drives the connecting roller to rotate, which in turn drives the hoist's chain. The tray at one end of the chain moves to its designated position as the chain rotates.

[0004] Most existing pallet lifts use pallet frames to lift pallets, but these frames do not have locking mechanisms. If the equipment collides or shakes, the pallet can easily slip off the frame, causing damage to the goods and potentially leading to accidents involving personnel.

[0005] Therefore, to address the aforementioned technical issues, it is necessary to provide a high-precision built-in reciprocating pallet lifting machine.

[0006] The information disclosed in this background section is intended only to enhance the understanding of the overall background of the invention and should not be construed as an admission or in any way implying that the information constitutes prior art known to those skilled in the art. Summary of the Invention

[0007] The purpose of this invention is to provide a high-precision built-in reciprocating pallet lifter, which can solve the problem that pallets are prone to slipping off the pallet frame during the lifting process in existing pallet lifters.

[0008] To achieve the above objectives, a specific embodiment of the present invention provides the following technical solution: A high-precision built-in reciprocating pallet lifter includes: a machine body, a feeding frame, a discharging frame, a first chain, a second chain, a synchronous transmission component, multiple pallet frame mechanisms, and multiple clamping mechanisms.

[0009] The front side wall of the machine body has a clearance groove. The feed rack and discharge rack are respectively fixed to the side walls of the machine body and are arranged alternately vertically. Multiple sliding rollers are rotatably mounted on both the feed rack and discharge rack at equal intervals. The first chain and the second chain are both rotatably mounted inside the machine body and are arranged alternately vertically. The synchronous transmission assembly is fixed to the machine body and is used to synchronously drive the first chain and the second chain to rotate.

[0010] Multiple pallet rack mechanisms are mounted on the first and second chains. Each pallet rack mechanism includes a Z-shaped support arm, a pair of rotating connectors, a horizontal plate, and multiple lifting arms. The two ends of the Z-shaped support arm are rotatably connected to the same position on the first and second chains via the pair of rotating connectors. The horizontal plate is fixed to one end of the Z-shaped support arm that extends beyond the clearance groove. Multiple lifting arms are fixed to the horizontal plate at equal intervals, and the lifting arms and multiple sliding rollers are staggered together.

[0011] The clamping mechanisms are respectively located at the ends of the lifting arms away from the horizontal plate, and are used to automatically clamp and release the pallet when the lifting arms lift and lower the pallet.

[0012] In one embodiment of the present invention, a pair of first chain teeth and a pair of second chain teeth are rotatably disposed on the front and rear sidewalls of the machine body, respectively, and the first chain and the second chain are rotatably disposed on the pair of first chain teeth and the second chain teeth, respectively. The first chain and the second chain rotate on the front and rear inner sidewalls of the machine body through the pair of first chain teeth and the second chain teeth, respectively.

[0013] In one embodiment of the present invention, a crossbeam is fixedly connected between the front and rear sidewalls of the machine body, and a support frame is fixed on the crossbeam. A pair of first and second chain teeth rotate between the support frame and the front and rear sidewalls of the machine body, respectively. The front sidewall of the machine body is fixedly supported by a pair of crossbeams, and the support frame supports the first and second chain teeth.

[0014] In one embodiment of the present invention, the synchronous transmission assembly includes: a pair of transmission wheels, a transmission belt, and a motor support. The pair of transmission wheels are respectively fixed to one end of the input shaft of one of the first and second chain teeth. The transmission belt is disposed on the pair of transmission wheels. The motor support is fixed to the outer wall of the machine body, and a servo motor is fixed thereon. The output shaft of the servo motor is connected to one of the input shafts of the first and second chain teeth.

[0015] The motor support is used to fix the servo motor to the machine body. The servo motor is used to drive one of the first chain teeth and the second chain teeth to rotate. Furthermore, the first chain teeth and the second chain teeth are synchronously rotated through a pair of transmission wheels and a transmission belt, thereby driving the first chain and the second chain to rotate synchronously.

[0016] In one embodiment of the present invention, the Z-shaped support arm includes: a connecting shaft, a connecting arm, and a control shaft. The connecting shaft and the control shaft are respectively fixed to the upper and lower ends of the connecting arm. The connecting shaft and the control shaft are respectively rotatable on a first chain and a second chain, and the horizontal plate is fixed to the end of the connecting shaft located outside the clearance groove. The connecting arm is rotatably connected to a pair of rotating connectors via the connecting shaft and the control shaft. The length of the connecting arm is equal to the height difference between the first chain and the second chain. By rotatably connecting the connecting shaft and the control shaft to the same position on the first chain and the second chain, when the first chain and the second chain drive the second chain tooth to rotate via the first chain tooth and the synchronous transmission assembly, the second chain tooth always remains vertical, thereby keeping the horizontal plate always horizontal.

[0017] In one embodiment of the present invention, the rotary connector includes a C-shaped seat and a shaft seat. The C-shaped seat is fixed to the first chain or the second chain. The shaft seat is fixed to the outer wall of the C-shaped seat, and the connecting shaft and the control shaft rotate on it. The two side walls of the C-shaped seat are respectively fixed to the two side walls of the first chain or the second chain, and the C-shaped seat is fixed between every two chain links. The shaft seat is used to connect the shaft or the control shaft to rotate on it.

[0018] In one embodiment of the present invention, the clamping mechanism includes: a fixed shaft, a lower pressure arm, a clamping arm, and a fixed plate. The fixed shaft is fixed to the end of the lifting arm away from the horizontal plate. Both the lower pressure arm and the clamping arm rotate on the fixed shaft, and an elastic connecting assembly connects the lower pressure arm and the clamping arm. The fixed plate is fixed to the bottom end of the lifting arm, and a V-shaped elastic element is provided between the fixed plate and the lower pressure arm.

[0019] When no goods are placed on the first rotating ring, the lower pressure arm is pushed upward by the elastic force of the V-shaped elastic element, causing the top of the lower pressure arm to rotate upward and extend outward from the top surface of the first rotating ring. Simultaneously, the lower pressure arm drives the clamping arm to rotate via the elastic connecting assembly, keeping the clamping arm in a vertical position. Furthermore, the lower pressure arm and the clamping arm are elastically connected via the elastic connecting assembly. When the first rotating ring lifts the pallet, the pallet's own weight presses the lower pressure arm downward, causing it to rotate. The lower pressure arm, through the elastic connecting assembly, drives the clamping arm to rotate, causing the end of the clamping arm to elastically press against one side of the pallet, thereby clamping the pallet.

[0020] In one embodiment of the present invention, a pair of first rotating rings and a second rotating ring are respectively fixed at one end of the pressing arm and the clamping arm near the fixed shaft. Both the first rotating rings and the second rotating ring rotate on the fixed shaft, and the second rotating ring is disposed between the pair of first rotating rings. The pressing arm and the clamping arm rotate on the fixed shaft via the pair of first rotating rings and the second rotating ring.

[0021] In one embodiment of the present invention, the elastic connection assembly includes: an extension plate, a pair of arc-shaped sliding sleeves, a pair of arc-shaped sliding rods, and a pair of compression springs. The extension plate is fixed to the end of the pair of first rotating rings away from the lower pressure arm. The pair of arc-shaped sliding sleeves are respectively fixed to the two side walls of the clamping arm. One end of each pair of arc-shaped sliding rods is fixed to the extension plate, and the other end slides on the pair of arc-shaped sliding sleeves, with a fixing head fixed at the end of each arc-shaped sliding rod passing through the arc-shaped sliding sleeve. The pair of compression springs are respectively disposed between the extension plate and the pair of arc-shaped sliding sleeves, and are respectively sleeved on the pair of arc-shaped sliding rods.

[0022] The arc-shaped sliding sleeve and the arc-shaped sliding rod have the same axis as the fixed shaft. The lowering arm and the clamping arm slide within the arc-shaped sliding sleeve through the arc-shaped sliding rod, achieving a rotary sliding connection between them. The compression spring force is used to push the clamping arm to rotate towards the fixed head, so that the top of the clamping arm is elastically pressed against the side wall of the tray. The fixed head is used to limit the movement and prevent the top of the arc-shaped sliding rod from sliding out of the arc-shaped sliding sleeve.

[0023] In use, the lower pressure arm is pressed down by the tray and rotates downward. The lower pressure arm drives the extension plate to rotate upward through the first rotating ring. The extension plate drives a pair of arc-shaped slide rods and a pair of compression springs to push the clamping arm to rotate synchronously. When the top of the clamping arm touches the side wall of the tray, the clamping arm stops rotating. At this time, the lower pressure arm continues to drive the extension plate and arc-shaped slide rods to rotate. The extension plate compresses the pair of compression springs. The rebound force of the pair of compression springs after being compressed pushes the top of the clamping arm to elastically press against the side wall of the tray.

[0024] After the pallet is removed from the lifting arm, the lower pressure arm is pushed upward by the elastic force of the V-shaped elastic element. The lower pressure arm drives the extension plate to rotate downward through the first rotating ring. The extension plate drives a pair of arc-shaped slide rods to rotate downward. The pair of arc-shaped slide rods pull the clamping arm back through a pair of fixed heads, and the clamping arm is kept vertical by the elastic force of a pair of compression springs.

[0025] In one embodiment of the present invention, rubber pressure heads are fixed to the top of both sides of the clamping arm, and the rubber pressure heads increase the friction between the top of the clamping arm and the side wall of the tray.

[0026] Compared with existing technologies, the high-precision built-in reciprocating pallet lifter of the present invention utilizes Z-shaped support arms, with both ends rotatably connected to the same position on the first and second chains respectively. This allows the first and second chains to rotate synchronously while simultaneously keeping the Z-shaped support arms vertical and rotating along the trajectory of the clearance groove. Consequently, as multiple lifting arms move along the clearance groove trajectory, their upper surfaces are always kept horizontal. Furthermore, when the multiple lifting arms lift the pallet up and down, a clamping mechanism automatically clamps the pallet onto the lifting arms, thereby improving the stability of the lifting arms when lifting the pallet. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 This is a perspective view of a high-precision built-in reciprocating pallet lifting machine according to an embodiment of the present invention; Figure 2 This is a schematic diagram of the internal structure of the machine body in one embodiment of the present invention; Figure 3 This is a schematic diagram of the structure of the first chain, the second chain, and the pallet frame mechanism in one embodiment of the present invention; Figure 4 This is a schematic diagram of the pallet rack mechanism and clamping mechanism in one embodiment of the present invention; Figure 5 This is a schematic diagram of the structure of the first chain and the second chain in one embodiment of the present invention; Figure 6 This is a schematic diagram of the clamping mechanism in one embodiment of the present invention.

[0029] Explanation of key figure labels: 1-Machine body, 101-Base, 102-Leaving slide, 103-Crossbeam, 104-Support frame, 105-Support guide rail, 106-Feeding frame, 107-Discharge frame, 108-Sliding roller, 2-First chain, 201-Second chain, 202-First chain tooth, 203-Second chain tooth, 204-Synchronous transmission assembly, 205-Motor support, 206-Servo motor, 207-Transmission wheel, 208-Transmission belt, 3-Pallet frame mechanism, 301-Horizontal plate, 302-Connecting shaft, 303-Connecting arm, 3 04-Control shaft, 305-Rotary connector, 306-C-shaped seat, 307-Shaft seat, 308-Lifting arm, 309-Baffle, 4-Clamping mechanism, 401-Fixed shaft, 402-Pressing arm, 403-Clamping arm, 404-Rubber pressure head, 405-Fixed plate, 406-V-shaped elastic element, 407-Elastic connection assembly, 408-First rotating ring, 409-Extension plate, 410-Arc-shaped slide bar, 411-Arc-shaped slide sleeve, 412-Fixed head, 413-Compression spring, 414-Second rotating ring. Detailed Implementation

[0030] To enable those skilled in the art to better understand the technical solutions in this disclosure, the technical solutions in the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this disclosure, and not all embodiments. Based on the embodiments in this disclosure, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of this disclosure.

[0031] like Figures 1 to 6 As shown, a high-precision built-in reciprocating pallet lifter according to one embodiment of the present invention includes: a machine body 1, a feeding frame 106, a discharging frame 107, a first chain 2, a second chain 201, a synchronous transmission assembly 204, multiple pallet frame mechanisms 3 and multiple clamping mechanisms 4.

[0032] like Figures 1 to 6 As shown, a clearance groove 102 is carved into the front side wall of the machine body 1. The feed rack 106 and the discharge rack 107 are respectively fixed to the two side walls of the machine body 1 and are arranged alternately vertically. Multiple sliding rollers 108 are rotatably arranged at equal intervals on the feed rack 106 and the discharge rack 107. The first chain 2 and the second chain 201 are both rotatably arranged inside the machine body 1 and are arranged alternately vertically. The synchronous transmission assembly 204 is fixed to the machine body 1 and is used to synchronously drive the first chain 2 and the second chain 201 to rotate.

[0033] The clearance groove 102 extends from the front end of multiple Z-shaped support arms. The feed rack 106 and discharge rack 107 are used for the pallet to enter and exit, respectively. The sliding roller 108 is used for the pallet to slide on the feed rack 106 or discharge rack 107. The synchronous transmission assembly 204 is used to synchronously drive the first chain 2 and the second chain 201 to rotate. The first chain 2 and the second chain 201 are used to drive the pallet frame mechanism 3 to rotate.

[0034] Preferably, a base 101 is fixed to the bottom of the body 1 to provide fixed support for the body 1. Secondly, a pair of support rails 105 are fixed to the front and rear inner side walls of the body 1. The two pairs of support rails 105 are respectively located inside the first chain 2 and the second chain 201 to provide support for the first chain 2 and the second chain 201.

[0035] like Figures 1 to 6 As shown, multiple pallet rack mechanisms 3 are mounted on the first chain 2 and the second chain 201. Each pallet rack mechanism 3 includes a Z-shaped support arm, a pair of rotating connectors 305, a horizontal plate 301, and multiple lifting arms 308. The two ends of the Z-shaped support arm are rotatably connected to the same position on the first chain 2 and the second chain 201 via a pair of rotating connectors 305. The horizontal plate 301 is fixed to one end of the Z-shaped support arm that extends out of the clearance groove 102. The multiple lifting arms 308 are fixed at equal intervals on the horizontal plate 301, and the multiple lifting arms 308 and the multiple sliding rollers 108 are staggered with each other.

[0036] The two ends of the Z-shaped support arm are rotatably connected to the same position on the first chain 2 and the second chain 201 via a pair of rotating connectors 305. This ensures that the Z-shaped support arm remains vertical while the first chain 2 and the second chain 201 rotate synchronously, thus keeping the horizontal plate 301 horizontal. Furthermore, the horizontal plate 301 is equipped with multiple lifting arms 308 that are interleaved with the sliding rollers 108, enabling the pallet to be lifted from the feed rack 106 or placed onto the discharge rack 107.

[0037] like Figures 1 to 6 As shown, multiple clamping mechanisms 4 are respectively disposed at one end of multiple lifting arms 308 away from the horizontal plate 301, and are used to automatically clamp and release the pallet when the multiple lifting arms 308 lift and lower the pallet.

[0038] In use, the synchronous transmission assembly 204 synchronously drives the first chain 2 and the second chain 201 to rotate, ensuring that the first chain 2 and the second chain 201 keep the Z-shaped support arm vertical and rotate along the trajectory of the clearance groove 102. The Z-shaped support arm, through the horizontal plate 301, drives multiple lifting arms 308 to rotate horizontally. The pallet to be lifted is then slid into the feed rack 106 from one end. When the horizontal plate 301 moves the multiple lifting arms 308 to the feed rack 106, the pallet on the feed rack 106 is lifted upwards. Simultaneously, the pallet is automatically clamped by the clamping mechanism 4. When the horizontal plate 301 moves the pallet along the trajectory of the clearance groove 102 to the discharge rack 107, the pallet is placed on the discharge rack 107. After the pallet is placed on the discharge rack 107, the clamping mechanism 4 automatically releases the pallet, and then the pallet slides out through the discharge rack 107.

[0039] like Figures 1 to 6 As shown, a pair of first chain teeth 202 and a pair of second chain teeth 203 are rotatably disposed on the front and rear side walls of the machine body 1, respectively. The first chain 2 and the second chain 201 are rotatably disposed on the pair of first chain teeth 202 and the pair of second chain teeth 203, respectively. The first chain 2 and the second chain 201 rotate on the front and rear inner side walls of the machine body 1 through the pair of first chain teeth 202 and the pair of second chain teeth 203, respectively.

[0040] Preferably, the height of a pair of first chain teeth 202 and a first chain 2 near the front sidewall of the body 1 is higher than the height of a pair of second chain teeth 203 and a second chain 201.

[0041] like Figures 1 to 6 As shown, a crossbeam 103 is fixedly connected between the front and rear side walls of the body 1. A support frame 104 is fixed on the crossbeam 103. A pair of first chain teeth 202 and second chain teeth 203 rotate between the support frame 104 and the front and rear side walls of the body 1, respectively. The front side wall of the body 1 is fixedly supported by a pair of crossbeams 103, and the support frame 104 supports the first chain teeth 202 and second chain teeth 203.

[0042] like Figures 1 to 6 As shown, the synchronous transmission assembly 204 includes: a pair of transmission wheels 207, a transmission belt 208, and a motor support 205. The pair of transmission wheels 207 are respectively fixed to one end of the input shaft of one of the first chain teeth 202 and the second chain tooth 203. The transmission belt 208 is disposed on the pair of transmission wheels 207. The motor support 205 is fixed to the outer wall of the machine body 1, and a servo motor 206 is fixed thereon. The output shaft of the servo motor 206 is connected to one of the input shafts of the first chain tooth 202 and the second chain tooth 203.

[0043] The motor support 205 is used to fix the servo motor 206 to the body 1. The servo motor 206 is used to drive one of the first chain teeth 202 and the second chain teeth 203 to rotate. Furthermore, the first chain teeth 202 and the second chain teeth 203 are synchronously rotated through a pair of transmission wheels 207 and a transmission belt 208, thereby driving the first chain 2 and the second chain 201 to rotate synchronously.

[0044] like Figures 1 to 6 As shown, the Z-shaped support arm includes: a connecting shaft 302, a connecting arm 303, and a control shaft 304. The connecting shaft 302 and the control shaft 304 are respectively fixed to the upper and lower ends of the connecting arm 303. The connecting shaft 302 and the control shaft 304 rotate on the first chain 2 and the second chain 201 respectively, and the cross plate 301 is fixed to one end of the connecting shaft 302 located outside the clearance groove 102. The connecting arm 303 is rotatably connected to a pair of rotating connectors 305 via the connecting shaft 302 and the control shaft 304 respectively. The length of the connecting arm 303 is equal to the height difference between the first chain 2 and the second chain 201. By rotatably connecting the connecting shaft 302 and the control shaft 304 to the same position on the first chain 2 and the second chain 201 respectively, when the first chain 2 and the second chain 201 drive the second chain tooth 203 to rotate via the first chain tooth 202 and the synchronous transmission assembly 204 respectively, the second chain tooth 203 always remains vertical, and the horizontal plate 301 always remains horizontal.

[0045] like Figures 1 to 6 As shown, the rotating connector 305 includes a C-shaped seat 306 and a shaft seat 307. The C-shaped seat 306 is fixed to the first chain 2 or the second chain 201. The shaft seat 307 is fixed to the outer wall of the C-shaped seat 306, and the connecting shaft 302 and the control shaft 304 rotate on it. The two side walls of the C-shaped seat 306 are respectively fixed to the two side walls of the first chain 2 or the second chain 201, and the C-shaped seat 306 is fixed between every two chain links. The shaft seat 307 is used to connect the shaft 302 or the control shaft 304 to rotate on it.

[0046] like Figures 1 to 6 As shown, the clamping mechanism 4 includes: a fixed shaft 401, a lower pressure arm 402, a clamping arm 403, and a fixed plate 405. The fixed shaft 401 is fixed to the end of the lifting arm 308 away from the horizontal plate 301. Both the lower pressure arm 402 and the clamping arm 403 rotate on the fixed shaft 401, and an elastic connecting assembly 407 connects the lower pressure arm 402 and the clamping arm 403. The fixed plate 405 is fixed to the bottom end of the lifting arm 308, and a V-shaped elastic element 406 is provided between the fixed plate 405 and the lower pressure arm 402.

[0047] When no goods are placed on the first rotating ring 408, the lower pressure arm 402 is pushed upward by the elastic force of the V-shaped elastic element 406, causing the top end of the lower pressure arm 402 to rotate upward and extend outward from the top surface of the first rotating ring 408. Simultaneously, the lower pressure arm 402 drives the clamping arm 403 to rotate via the elastic connecting assembly 407, keeping the clamping arm 403 in a vertical position. Furthermore, the lower pressure arm 402 and the clamping arm 403 are elastically connected via the elastic connecting assembly 407. When the first rotating ring 408 lifts the pallet, the pallet's own weight presses the lower pressure arm 402 downward, causing it to rotate downward. The lower pressure arm 402, through the elastic connecting assembly 407, drives the clamping arm 403 to rotate, causing the end of the clamping arm 403 to elastically press against one side of the pallet, thereby clamping the pallet.

[0048] Preferably, the top of the horizontal plate 301 is also fixed with multiple baffles 309, which are used to assist the clamping arm 403 in clamping the pallet.

[0049] like Figures 1 to 6 As shown, a pair of first rotating rings 408 and a second rotating ring 414 are fixed to one end of the lower pressure arm 402 and the clamping arm 403 near the fixed shaft 401, respectively. Both the first rotating rings 408 and the second rotating ring 414 rotate on the fixed shaft 401, and the second rotating ring 414 is located between the first rotating rings 408. The lower pressure arm 402 and the clamping arm 403 rotate on the fixed shaft 401 via the pair of first rotating rings 408 and the second rotating ring 414, respectively. Rubber pressure heads 404 are fixed to the top ends of both side walls of the clamping arm 403, and the rubber pressure heads 404 increase the friction between the top end of the clamping arm 403 and the side wall of the tray.

[0050] like Figures 1 to 6 As shown, the elastic connection assembly 407 includes: an extension plate 409, a pair of arc-shaped sliding sleeves 411, a pair of arc-shaped sliding rods 410, and a pair of compression springs 413. The extension plate 409 is fixed to one end of a pair of first rotating rings 408 away from the lower pressure arm 402. The pair of arc-shaped sliding sleeves 411 are respectively fixed to the two side walls of the clamping arm 403. One end of each pair of arc-shaped sliding rods 410 is fixed to the extension plate 409, and the other end slides on the pair of arc-shaped sliding sleeves 411 respectively. A fixing head 412 is fixed to one end of each arc-shaped sliding rod 410 that passes through the arc-shaped sliding sleeve 411. The pair of compression springs 413 are respectively disposed between the extension plate 409 and the pair of arc-shaped sliding sleeves 411, and are respectively sleeved on the pair of arc-shaped sliding rods 410.

[0051] The axes of the arc curves of the arc-shaped sliding sleeve 411 and the arc-shaped sliding rod 410 are the same as the axis of the fixed shaft 401. The lower pressure arm 402 and the clamping arm 403 slide within the arc-shaped sliding sleeve 411 through the arc-shaped sliding rod 410, realizing a rotary sliding connection between the two. The elastic force of the compression spring 413 is used to push the clamping arm 403 to rotate in the direction of the fixed head 412, so that the top end of the clamping arm 403 is elastically pressed against the side wall of the tray. The fixed head 412 is used to limit the movement and prevent the top end of the arc-shaped sliding rod 410 from sliding out of the arc-shaped sliding sleeve 411.

[0052] In use, the lower pressure arm 402 is pressed down by the tray and rotates downward. The lower pressure arm 402 drives the extension plate 409 to rotate upward through the first rotating ring 408. The extension plate 409 drives a pair of arc-shaped slide rods 410 and a pair of compression springs 413 to push the clamping arm 403 to rotate synchronously. When the top of the clamping arm 403 touches the side wall of the tray, the clamping arm 403 stops rotating. At this time, the lower pressure arm 402 continues to drive the extension plate 409 and the arc-shaped slide rods 410 to rotate. The extension plate 409 compresses the pair of compression springs 413. The rebound force of the pair of compression springs 413 after being compressed pushes the top of the clamping arm 403 to elastically press against the side wall of the tray.

[0053] After the pallet is removed from the lifting arm 308, the lower pressure arm 402 is pushed upward by the elastic force of the V-shaped elastic element 406. The lower pressure arm 402 drives the extension plate 409 to rotate downward through the first rotating ring 408. The extension plate 409 drives a pair of arc-shaped slide rods 410 to rotate downward. The pair of arc-shaped slide rods 410 pull the clamping arm 403 back through a pair of fixed heads 412, and under the elastic force of a pair of compression springs 413, the clamping arm 403 is kept in a vertical state.

[0054] Working principle: During use, the servo motor 206 drives the first chain tooth 202 and the second chain tooth 203 to rotate synchronously through the transmission wheel 207 and the transmission belt 208. The first chain tooth 202 and the second chain tooth 203 drive the first chain 2 and the second chain 201 to rotate synchronously. The first chain 2 and the second chain 201 drive the Z-shaped support arm to always remain vertical and rotate along the trajectory of the clearance groove 102 through the rotating connector 305. The Z-shaped support arm drives multiple lifting arms 308 to always remain horizontal and rotate through the horizontal plate 301.

[0055] The pallet to be lifted is then slid into the feed rack 106 from one end. When the horizontal plate 301 moves multiple lifting arms 308 to the feed rack 106, the pallet on the feed rack 106 is lifted upward. At the same time the pallet is lifted, the pallet presses the lower pressure arm 402 to rotate downward. The lower pressure arm 402 drives the extension plate 409 to rotate upward through the first rotating ring 408. The extension plate 409 drives a pair of arc-shaped slide rods 410 and a pair of compression springs 413 to push the clamping arm 403 to rotate synchronously. When the top of the clamping arm 403 touches the side wall of the pallet, the clamping arm 403 stops rotating. At this time, the lower pressure arm 402 continues to drive the extension plate 409 and the arc-shaped slide rods 410 to rotate. The extension plate 409 compresses the pair of compression springs 413. The rebound force of the pair of compression springs 413 after being compressed pushes the top of the clamping arm 403 to elastically press against the side wall of the pallet.

[0056] Subsequently, when the horizontal plate 301 moves the pallet to the discharge rack 107 along the trajectory of the clearance groove 102, the pallet is placed on the discharge rack 107. After the pallet is placed on the discharge rack 107, the lower pressure arm 402 is pushed upward by the elastic force of the V-shaped elastic element 406. The lower pressure arm 402 drives the extension plate 409 to rotate downward through the first rotating ring 408. The extension plate 409 drives a pair of arc-shaped slide rods 410 to rotate downward. The pair of arc-shaped slide rods 410 pull the clamping arm 403 back through a pair of fixed heads 412, and the clamping arm 403 is kept vertical by the elastic force of a pair of compression springs 413.

[0057] It will be apparent to those skilled in the art that this disclosure is not limited to the details of the exemplary embodiments described above, and that this disclosure can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of this disclosure is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this disclosure. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0058] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A high-precision built-in reciprocating pallet lifting machine, characterized in that, include: The body has a clearance groove carved in the front side wall; The feeding rack and the discharging rack are respectively fixed on the two side walls of the machine body, and multiple sliding rollers are rotatably arranged at equal intervals on the feeding rack and the discharging rack. The first chain and the second chain are both rotatably mounted inside the machine body and are arranged alternately above and below each other; A synchronous transmission assembly is fixed to the machine body; Multiple pallet racking mechanisms are all mounted on the first chain and the second chain. Each pallet racking mechanism includes: a Z-shaped support arm, a pair of rotating connectors, a horizontal plate, and multiple lifting arms. The two ends of the Z-shaped support arm are rotatably connected to the same position on the first chain and the second chain through a pair of rotating connectors. The horizontal plate is fixed to one end of the Z-shaped support arm that extends out of the clearance groove. The multiple lifting arms are fixed to the horizontal plate at equal intervals, and the multiple lifting arms and multiple sliding rollers are staggered with each other. and Multiple clamping mechanisms are respectively located at the ends of multiple lifting arms away from the horizontal plate.

2. The high-precision built-in reciprocating pallet lifting machine according to claim 1, characterized in that, A pair of first chain teeth and a pair of second chain teeth are rotatably disposed on the front and rear side walls of the machine body, respectively, and the first chain and the second chain are rotatably disposed on the pair of first chain teeth and the second chain teeth.

3. A high-precision built-in reciprocating pallet lifting machine according to claim 2, characterized in that, A crossbeam is fixedly connected between the front and rear side walls of the machine body, and a support frame is fixed on the crossbeam. A pair of first chain teeth and second chain teeth rotate between the support frame and the front and rear side walls of the machine body, respectively.

4. A high-precision built-in reciprocating pallet lifting machine according to claim 3, characterized in that, The synchronous transmission assembly includes: A pair of drive wheels are respectively fixed to one end of the input shaft of one of the first chain teeth and the second chain teeth; A transmission belt is disposed on a pair of said transmission pulleys; and A motor support is fixed to the outer wall of the machine body, and a servo motor is fixed on it. The output shaft of the servo motor is connected to one of the input shafts of the first chain tooth and the second chain tooth.

5. A high-precision built-in reciprocating pallet lifting machine according to claim 1, characterized in that, The Z-shaped support arm includes a connecting shaft, a connecting arm, and a control shaft. The connecting shaft and the control shaft are fixed to the upper and lower ends of the connecting arm, respectively. The connecting shaft and the control shaft rotate on the first chain and the second chain, respectively. The cross plate is fixed to the end of the connecting shaft located outside the clearance groove.

6. A high-precision built-in reciprocating pallet lifting machine according to claim 5, characterized in that, The rotary connector includes: C-shaped brackets are fixed to the first or second chain; and A bearing seat is fixed to the outer wall of the C-shaped seat, and the connecting shaft and control shaft rotate on it.

7. A high-precision built-in reciprocating pallet lifting machine according to claim 1, characterized in that, The clamping mechanism includes: A fixed shaft is fixed inside the end of the lifting arm away from the horizontal plate; Both the pressing arm and the clamping arm rotate on the fixed shaft, and a resilient connecting assembly connects the pressing arm and the clamping arm; and A fixing plate is fixed to the bottom end of the lifting arm, and a V-shaped elastic element is provided between the fixing plate and the lower pressure arm.

8. A high-precision built-in reciprocating pallet lifting machine according to claim 7, characterized in that, The lowering arm and the clamping arm are respectively fixed with a pair of first rotating rings and a second rotating ring at one end near the fixed shaft. Both the first rotating rings and the second rotating ring rotate on the fixed shaft, and the second rotating ring is located between the pair of first rotating rings.

9. A high-precision built-in reciprocating pallet lifting machine according to claim 8, characterized in that, The resilient connection component includes: An extension plate is fixed to the end of a pair of first rotating rings away from the lower pressure arm; A pair of arc-shaped sliding sleeves are respectively fixed to the two side walls of the clamping arm; A pair of arc-shaped sliding rods, each with one end fixed to an extension plate, and the other ends sliding on a pair of arc-shaped sliding sleeves respectively, with a fixed head fixed at the end of each arc-shaped sliding rod passing through the arc-shaped sliding sleeve; and A pair of compression springs are respectively disposed between the extension plate and a pair of arc-shaped sliding sleeves, and are respectively sleeved on a pair of arc-shaped sliding rods.

10. A high-precision built-in reciprocating pallet lifting machine according to claim 7, characterized in that, Rubber pressure heads are fixed to the top of both sides of the clamping arm.

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