A reciprocating conveyor device

Abstract

This invention provides a reciprocating conveying device, including a left-end pallet lifting unit, a middle-section conveying sliding unit, a right-end unloading return unit, and a pallet. The middle-section conveying sliding unit includes upper and lower roller tracks, with the upper track inclined downwards from left to right and the lower track inclined downwards from right to left. The left-end pallet lifting unit connects to the left end of the middle-section conveying sliding unit and includes a reciprocating lifting plate capable of reciprocating between the lower and upper roller track connection positions. The right-end unloading return unit connects to the right end of the middle-section conveying sliding unit and includes a tilting plate and an opening / closing locking device. When idle, the tilting plate connects to the upper roller track, and the opening / closing locking device locks the position. The pallet carrying material slides from the upper roller track onto the tilting plate. After unlocking the opening / closing locking device, the tilting plate tilts downwards, and the pallet returns along the lower roller track. This device reduces the manual handling of tools and components, eliminating the need for bending over to complete the operation.

Description

Technical Field

[0001] This invention relates to the field of material conveying technology, and more specifically to a reciprocating conveying device. Background Technology

[0002] During automobile assembly, some parts need to be pre-assembled into a single unit before assembly. Some of these pre-assembled parts are excessively heavy, leading to the following three prominent problems in transferring them from the pre-assembly station to the assembly station:

[0003] 1. The process of placing parts at the upper workstation and retrieving parts at the lower workstation requires bending over, which is not in line with ergonomics.

[0004] 2. Using a transfer vehicle involves cumbersome steps, resulting in wasted time and walking.

[0005] 3. Excessive wasted time causes the workstation to exceed its production cycle time.

[0006] Specifically, the process of manually transporting equipment and parts to designated locations consumes too much time and requires bending over to lift heavy objects. The entire process is too cumbersome, which is not conducive to the production process and results in wasted time.

[0007] Currently, the most mature devices capable of realizing parts transfer functions are mainly electrical automation control equipment, which combines PLC control circuits with mechanical equipment. However, using automated equipment for tool transfer has the following main disadvantages:

[0008] 1. Automated equipment has high procurement costs, limited application at a single workstation, low flexibility for modification, and high modification costs;

[0009] 2. Due to its complex structure, it requires dedicated personnel to perform equipment maintenance at fixed times and locations, resulting in high maintenance costs;

[0010] 3. The equipment is highly specialized, and requires specialized personnel for repair when a malfunction occurs; it cannot be repaired quickly and independently.

[0011] In view of the above-mentioned defects, the inventors of this invention have finally obtained this invention after a long period of research and practice. Summary of the Invention

[0012] To address the aforementioned technical deficiencies, this invention provides a reciprocating conveying device that reduces the manual handling of tools and components, eliminates the time and unnecessary movements required for handling tools and components, and provides convenience for users.

[0013] The technical solution adopted in this invention is as follows:

[0014] A reciprocating conveying device is provided, comprising a left-end pallet lifting unit, a middle-section conveying sliding unit, a right-end unloading return unit, and a pallet;

[0015] The middle section conveying sliding unit includes upper and lower roller tracks. The upper roller track slopes downward from left to right, and the lower roller track slopes downward from right to left.

[0016] The left pallet lifting unit is connected to the left end of the middle transfer sliding unit, and includes a reciprocating lifting plate. The reciprocating lifting plate can reciprocate between a first position and a second position. In the first position, it is connected to the lower roller conveyor to receive empty pallets sliding down from the lower roller conveyor. In the second position, it is connected to the upper roller conveyor. After the material is placed on the pallet, the pallet enters the upper track and slides to the right under the action of gravity.

[0017] The right-end unloading return unit is connected to the right end of the middle section transfer sliding unit, and includes a flipping plate and an opening and closing locking device. When the flipping plate is idle, it is connected to the upper roller conveyor and locked in position under the action of the opening and closing locking device. The pallet carrying the material slides from the upper roller conveyor onto the flipping plate. After the material is unloaded, the opening and closing locking device is unlocked. Under the action of gravity, the flipping plate carrying the pallet flips downward and connects with the lower roller conveyor. The empty pallet slides to the left along the lower roller conveyor.

[0018] Furthermore, a first single-disc release mechanism is provided at the left end of the lower roller conveyor. The left-end pallet lifting unit also includes a left-end frame, an electric push rod, a pulley block, and a first pull rope. The pulley block is installed on the left-end frame or on the left-end frame and the reciprocating lifting plate. The electric push rod is installed on the left-end frame, and the reciprocating lifting plate is slidably connected to the left-end frame along the longitudinal direction. The electric push rod acts as a power source to drive the first pull rope in conjunction with the pulley block to make the reciprocating lifting plate perform reciprocating lifting motion. During the descent of the reciprocating lifting plate, the first single-disc release mechanism is triggered, thereby releasing the leftmost pallet on the lower roller conveyor and preventing subsequent pallets from sliding down after the reciprocating lifting plate docks with the lower roller conveyor, so that a single pallet slides down onto the reciprocating lifting plate under the action of gravity. During the ascent of the reciprocating lifting plate, the first single-disc release mechanism is reset, so that subsequent pallets on the lower roller conveyor slide to the left to fill the gap and lock in position.

[0019] Preferably, the first single-disc release mechanism includes a rotating shaft and a first elastic element. The axis of the rotating shaft extends along the conveying direction of the lower roller conveyor. A left stop and a right stop are fixedly spaced on the rotating shaft. The axes of the left stop and the right stop are perpendicular to each other. The distance between the left stop and the right stop is sufficient to accommodate a tray. A handle is fixed to the left end of the rotating shaft. A trigger rod is fixed to the reciprocating lifting plate.

[0020] When the handle is not subjected to external force, the rotating shaft maintains the left stop bar in a vertical state under the action of the first elastic element, thereby blocking the leftmost tray on the lower roller conveyor; during the descent of the reciprocating lifting plate, the trigger rod presses down on the handle, thereby driving the rotating shaft to rotate, causing the left stop bar to rotate to a horizontal state and the right stop bar to rotate to a vertical state, thereby releasing the leftmost tray on the lower roller conveyor and blocking the adjacent right tray.

[0021] Preferably, the left pallet lifting unit further includes a controller and a travel limit switch. The controller can adjust the running direction of the electric push rod, thereby controlling the movement direction of the reciprocating lifting plate. The travel limit switch is electrically connected to the controller. During the process of the pallet on the lower roller conveyor sliding onto the reciprocating lifting plate, the travel limit switch is triggered, and the controller controls the reciprocating lifting plate to rise. During the process of the pallet carrying the material being pushed onto the upper roller conveyor, the travel limit switch is released, and the controller controls the reciprocating lifting plate to descend.

[0022] Furthermore, the right-end unloading return unit also includes a right-end frame. The opening and closing locking device includes a rotating rod, a support rod, and a locking mechanism. The locking mechanism includes a locking sleeve and a locking pin. The tilting plate is hinged to the right-end frame. The locking sleeve is fixedly installed on the right-end frame. The locking pin is slidably connected to the locking sleeve. The rotating rod is fixedly connected to the support rod. The support rod supports the tilting plate. The rotating rod is rotatably connected to the right-end frame. When the rotating rod is prevented from rotating by the locking pin, the support rod is fixed in position, supporting the tilting plate in a position where it docks with the upper roller conveyor. The locking pin slides relative to the locking sleeve, releasing the rotating rod, causing the tilting plate to lose the support of the support rod and tilt downwards to dock with the lower roller conveyor.

[0023] Preferably, the right-end unloading return unit further includes a return device, which includes a balancer connected to the rotating rod. The tilting plate tilts downward under the weight of the pallet, causing the rotating rod to rotate in the forward direction and the balancer to store force. After the pallet slides into the lower roller conveyor, the tilting plate loses pressure, and the balancer pulls the rotating rod to rotate in the opposite direction, thereby causing the tilting plate to return to its original position and dock with the upper roller conveyor.

[0024] Furthermore, the locking mechanism also includes an elastic return member and a limiting mechanism. The limiting mechanism includes a limiting rod and a locking member. Under the action of the elastic return member, the locking pin is in a position that prevents the rotating rod from rotating. Under external force, when the locking pin slides to release the rotating rod, the locking member locks the position of the locking pin to prevent it from returning to its original position. During the process of the balancer pulling the rotating rod to rotate back to its original position, it finally stops against the limiting rod. The limiting rod is subjected to a force from the rotating rod, thereby releasing the locking member, and thus the locking pin returns to the position that prevents the rotating rod from rotating forward under the action of the elastic return member.

[0025] Furthermore, the right-end unloading return unit also includes a foot pedal, which is connected to the locking pin via a second pull rope. Applying force through the foot pedal can pull the locking pin to slide and release the rotating rod.

[0026] Furthermore, a second single-disc release mechanism is provided at the right end of the upper roller conveyor. The second single-disc release mechanism includes a shaft and a second elastic element. The axis of the shaft extends along the conveying direction of the upper roller conveyor. A stop is rotatably mounted on the shaft. The stop is connected to the rotating rod via a third pull rope. When no external force is applied, the stop is in a state of blocking the tray on the upper roller conveyor from sliding downward under the action of the second elastic element. When the rotating rod rotates in the forward direction, the stop is pulled by the third pull rope to rotate, causing the stop to release the rightmost tray of the upper roller conveyor, allowing it to slide to the right.

[0027] The top of the stop is provided with a roller. After the stop releases the tray, the roller contacts the bottom of the tray, allowing the tray to slide down smoothly. When the flip plate returns to its original position and the rotating rod rotates in the opposite direction, the stop loses external force. After a tray passes by, the stop resets under the action of the second elastic element, preventing the following tray from sliding down.

[0028] Preferably, the tray includes a lower base, an upper turntable, and a rotation limiter. The upper turntable is rotatably connected to the lower base, and a material positioning structure is installed on the upper turntable. The rotation limiter is used to lock and release the relative position between the upper and lower turntables.

[0029] Preferably, the material positioning structure includes a positioning post and a locking piece for stabilizing the conveyed material on the upper turntable; the rotation limiter is fixed at the edge of the upper turntable and includes two parallel locking rods and two cooperating sleeves. The sleeves are fixed on the upper turntable, and the locking rods can slide up and down along the sleeves; when the locking rod slides to the lowest position, it fits against the edge of the lower chassis to prevent the rotation of the upper turntable; when the locking rod is raised to a position higher than the lower turntable, it releases the rotation of the upper turntable.

[0030] A spring is provided between the locking rod and the sleeve. When no external force is applied, the locking rod remains at the lowest position under the action of the spring. The upper turntable reaches the locking position once every 180° rotation.

[0031] The tops of the two locking levers are connected by a handle.

[0032] Preferably, both the flip plate and the reciprocating lifting plate are provided with smooth strips that connect with the middle section transfer sliding unit, so that the tray can slide in and out smoothly.

[0033] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0034] The reciprocating conveyor of this invention is low in cost, easy to maintain, and highly flexible and adaptable. Using this reciprocating conveyor to transfer tools and components eliminates the need for bending over, conforming to ergonomic principles. It can be integrated with the site layout, reducing walking distances when handling tools and components. The lifting, lowering, and conveying processes of the pallet are simple and easy to operate. The pallet style can be changed according to the type of tools and components, allowing for diverse conveying options. Attached Figure Description

[0035] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0036] Figure 1 A schematic diagram of the overall structure of the reciprocating conveyor according to an embodiment of the present invention is shown.

[0037] Figure 2 A schematic diagram of the structure of the left pallet lifting unit according to an embodiment of the present invention is shown;

[0038] Figure 3A schematic diagram of the mid-section transfer sliding unit according to an embodiment of the present invention is shown;

[0039] Figure 4 A schematic diagram of the structure of the first single-disc release mechanism according to an embodiment of the present invention is shown;

[0040] Figure 5 A schematic diagram of the right-end unloading return unit according to an embodiment of the present invention is shown;

[0041] Figure 6 A schematic diagram of the locking mechanism according to an embodiment of the present invention is shown;

[0042] Figure 7 A schematic diagram of the structure of the second single-disc release mechanism according to an embodiment of the present invention is shown;

[0043] Figure 8 A schematic diagram of the structure of a tray according to an embodiment of the present invention is shown;

[0044] Figure 9 A schematic diagram of the structure of a tray rotation limiter according to an embodiment of the present invention is shown;

[0045] Figure 10 A schematic diagram of the tray's rotation state according to an embodiment of the present invention is shown. Detailed Implementation

[0046] The above-mentioned and other technical features and advantages of the present invention will be described in more detail below with reference to the accompanying drawings.

[0047] In the description of this invention, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "axial," and "radial," etc., indicate the orientation or positional relationship based on the appendix. Figure 1 The orientations or positional relationships shown are for the purpose of describing the present invention only, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as limiting the present invention.

[0048] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, unless otherwise explicitly specified.

[0049] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0050] like Figure 1 As shown, the reciprocating conveyor includes a left-end pallet lifting unit 100, a middle-section conveying sliding unit 200, a right-end unloading return unit 300, and a pallet 400. The middle-section conveying sliding unit includes upper and lower roller tracks. The upper roller track 200 slopes downward from left to right, and the lower roller track 202 slopes downward from right to left. Multiple sets of flow strips are present on both roller tracks, their main function being to transport the pallet in a specified direction. The left-end pallet lifting unit 100 connects to the left end of the middle-section conveying sliding unit 200. The left-end pallet lifting unit 100 includes a reciprocating lifting plate 101, which can reciprocate between a first position and a second position. In the first position, it connects to the lower roller track 202 to receive an empty pallet 400 sliding down from the lower roller track. In the second position, it connects to the upper roller track 201, and after material is placed on the pallet 400, the pallet enters the upper track 201 and slides to the right under gravity. The right-end unloading return unit 300 is connected to the right end of the middle section transfer sliding unit 200. The right-end unloading return unit 300 includes a tilting plate 301 and an opening and closing locking device. When idle, the tilting plate 301 is connected to the upper roller conveyor 201 and locked in position by the opening and closing locking device. The pallet 400 carrying the material slides from the upper roller conveyor 201 onto the tilting plate 301. After unloading the material, the opening and closing locking device is unlocked. Under the action of gravity, the tilting plate carrying the pallet 400 tilts downward and connects with the lower roller conveyor 202. The idle pallet 400 slides to the left along the lower roller conveyor. In actual operation, the empty pallet 400 on the lower roller conveyor 202 slides onto the reciprocating lifting plate 101 located in the second position. The reciprocating lifting plate 101 rises to the first position, and the operator at the upper station places the parts on the pallet and pushes the pallet carrying the parts onto the upper track 201. The parts slide along the upper track 201 onto the tilting plate 301. After the operator at the lower station removes the parts, the opening and closing locking device is unlocked, and the tilting plate 301 tilts downwards, allowing the empty pallet 400 to slide into the lower roller conveyor 202 and slide to the far right. The parts storage racks at both ends of the reciprocating conveyor generally have a certain height, so that the operator does not need to bend over to lift heavy objects throughout the entire process. The transfer process is more convenient, reduces physical load, and the transfer rhythm is fast, achieving the production cycle.

[0051] like Figure 2As shown, in a specific embodiment, the left-end pallet lifting unit includes a left-end frame 102, a reciprocating lifting plate 101, an electric push rod 103, a pulley block 105, and a first pull rope (not shown in the figure). The pulley block 105 is mounted on the left-end frame 102 or on both the left-end frame 102 and the reciprocating lifting plate 101. The electric push rod 103 is mounted on the left-end frame 102, which has a column. The reciprocating lifting plate 101 cooperates with the column through a linear rolling assembly, thereby enabling it to slide up and down. The electric push rod 103 acts as a power source, driving the first pull rope in conjunction with the pulley block 105 to perform reciprocating lifting motions on the reciprocating lifting plate 101. It is understood that the pulley block 105 includes fixed pulleys or a combination of fixed and movable pulleys. The arrangement of the first pull rope and the pulley block 105 can be configured according to actual needs and is not limited to that shown in the figure. The reciprocating motion of the electric push rod 103 drives the reciprocating lifting plate 101 to perform reciprocating lifting motions, which will not be elaborated further here. Therefore, the reciprocating lifting plate 101 can automatically lift and lower, automatically receiving and raising empty pallets, avoiding the need for operators to bend over to lift heavy objects.

[0052] like Figures 2-4 As shown, a first single-disc release mechanism 203 is further provided at the left end of the lower roller conveyor 202. During the descent of the reciprocating lifting plate 101, the first single-disc release mechanism 203 is triggered, thereby releasing the leftmost pallet on the lower roller conveyor 202 after the reciprocating lifting plate 101 docks with the lower roller conveyor 202 and preventing subsequent pallets from sliding down, allowing a single pallet to slide down onto the reciprocating lifting plate 101 under the influence of gravity. During the ascent of the reciprocating lifting plate 101, the first single-disc release mechanism resets, causing subsequent pallets on the lower roller conveyor to slide to the left to fill the empty space and then lock in their position.

[0053] An exemplary specific solution is as follows: The first single-disc release mechanism 203 includes a rotating shaft 2031 and a first elastic element (not shown in the figure). The axis of the rotating shaft 2031 extends along the conveying direction of the lower roller conveyor 202. A radially extending left stop 2033 and a right stop 2034 are fixed at intervals on the rotating shaft 2031. The axes of the left stop 2033 and the right stop 2034 are perpendicular to each other. The distance between the left stop 2033 and the right stop 2034 is sufficient to accommodate a tray. A handle 2032 is fixed to the left end of the rotating shaft 2031. A trigger rod 104 is fixed on the reciprocating lifting plate 101. When the handle 2032 is not subjected to external force, the rotating shaft 2031 maintains the left stop 2033 in a vertical state under the action of the first elastic element, thereby blocking the leftmost tray on the lower roller conveyor 202. During the descent of the reciprocating lifting plate 101, the trigger rod 104 presses down the handle 2032, thereby driving the rotating shaft 2031 to rotate, causing the left stop 2033 to rotate to a horizontal state and the right stop 2034 to rotate to a vertical state, thereby releasing the leftmost tray on the lower roller conveyor 202 and blocking the adjacent right tray. Similarly, when the reciprocating lifting plate 101 rises, the handle 2032 loses external force, and the rotating shaft 2031 rotates back under the action of the first elastic element, achieving a vertical left stop 2033 and a horizontal right stop 2034, allowing subsequent trays to slide down and fill the gap, blocked by the left stop 2033.

[0054] Through the ingenious structural cooperation between the first single-disc release mechanism 203 and the left-end pallet lifting unit 100, the single pallet can be lifted at the upper work station, and the pallets on the lower roller conveyor 202 can be arranged sequentially as individual feed pallets. This results in high reliability, low maintenance costs, and no need for an expensive control system.

[0055] Furthermore, the left pallet lifting unit 100 is also equipped with a controller (not shown in the figure) and a travel limit switch (not shown in the figure). The controller can adjust the running direction of the electric push rod 103, thereby controlling the movement direction of the reciprocating lifting plate 101. The travel limit switch is electrically connected to the controller. During the process of the pallet on the lower roller conveyor 202 sliding onto the reciprocating lifting plate, the travel limit switch is triggered, and the controller controls the reciprocating lifting plate 101 to rise. During the process of the pallet carrying the material being pushed onto the upper roller conveyor, the travel limit switch is released, and the controller controls the reciprocating lifting plate to descend. The left pallet lifting unit 100 integrates a forward and reverse controller. By adjusting the forward and reverse operation of the electric push rod, the pulley block 105 is driven to reciprocate the reciprocating lifting plate 101. During the descent of the reciprocating lifting plate 101, the first single-disc release mechanism 203 is opened, and a pallet is transferred to the reciprocating lifting plate 101. During operation, the pallet touches the travel limit switch, causing the upper and lower reciprocating platform to rise and lift the pallet to the designated location. Parts are placed on the pallet and the whole thing is transferred to the next location. The travel limit switch is released, and the reciprocating lifting plate 101 returns to its original position, thus reciprocating.

[0056] Controlled by the controller and travel limit switch, the operator at the upper station places the parts on the pallet and pushes the pallet carrying the parts into the upper track 201. While turning around to pick up another part, the reciprocating lifting plate 101 automatically completes the process of lowering to pick up the pallet and then rising again, perfectly connecting the operator's part retrieval time and greatly improving work efficiency.

[0057] Preferably, the reciprocating lifting plate 101 is provided with a smooth strip 1011 that connects with the middle section transfer sliding unit, so that the pallet can slide in and out smoothly.

[0058] like Figure 5 , Figure 6 As shown, in a specific embodiment, the right-end unloading return unit 300 includes a right-end frame 302, a flip plate 301, and an opening and closing locking device. The opening and closing locking device includes a rotating rod 303, a support rod 305, and a locking mechanism 304. The locking mechanism 304 includes a locking sleeve 3041 and a locking pin 3042. The flipping plate 301 is hinged to the right end frame 302. The locking sleeve 3041 is fixedly installed on the right end frame 302. The locking pin 3042 is slidably connected to the locking sleeve 3041. The rotating rod 303 is fixedly connected to the support rod 305. The support rod 305 supports the flipping plate 301. The rotating rod 303 is rotatably connected to the right end frame 302. When the rotating rod 303 is prevented from rotating by the locking pin 3042, the support rod 305 is fixed in position, supporting the flipping plate 301 in the position of docking with the upper roller conveyor 201. The locking pin 3042 slides relative to the locking sleeve 3041, releasing the rotating rod 303, so that the flipping plate 301 loses the support of the support rod 305 and flips downward to dock with the lower roller conveyor 202. The pallet 400 carrying the parts slides along the upper track 201 onto the tilting plate 301. After the operator at the lower station removes the parts, the opening and closing locking device is unlocked, and the tilting plate 301 flips downwards. The empty pallet 400 slides into the lower roller conveyor 202 and moves to the far right. This achieves automatic return of the empty pallet 400, resulting in high work efficiency.

[0059] Furthermore, the right-end unloading return unit also includes a return device, which includes a balancer 306 connected to a rotating rod 303. Under the weight of the pallet, the tilting plate 301 tilts downwards, causing the rotating rod 303 to rotate forward and accumulating force in the balancer 306. After the pallet slides into the lower roller conveyor 202, the tilting plate 301 loses pressure, and the balancer 306 pulls the rotating rod 303 to rotate in the opposite direction, thereby causing the tilting plate 301 to return to its original position and engage with the upper roller conveyor 201. The return device allows the tilting plate 301 to automatically reset, eliminating the need for manual operation and improving efficiency.

[0060] The locking mechanism 304 also includes an elastic return member (not shown in the figure) and a limiting mechanism 307. The limiting mechanism 307 includes a limiting rod 3072 and a locking member 3071. Under the action of the elastic return member, the locking pin 304 is in a position that prevents the rotating rod 303 from rotating. Under external force, when the locking pin 3042 slides to release the rotating rod 303, the locking member 3071 locks the position of the locking pin 3042 to prevent it from returning to its original position. In this embodiment, the locking pin 3042 is provided with a protrusion. When the locking pin 3042 slides to release the rotating rod 303, the locking member 3071 blocks the protrusion, making it impossible for the locking pin 3042 to return to its original position. During the process of the balancer 306 pulling the rotating rod 303 to rotate back to its original position, it eventually stops against the limiting rod 3072. The limiting rod 3072 is linked with the locking member 3071. The limiting rod 3072 is subjected to the force from the rotating rod 303, causing the locking member 3071 to move and no longer interfere with the protrusion on the locking pin 3042. Consequently, the locking pin 3042 returns to its original position under the action of the elastic return member, preventing the rotating rod 303 from rotating forward. The automatic linkage between the return and locking of the flip plate 301 through the mechanical structure ensures both operational safety and efficiency.

[0061] Preferably, the right-end unloading return unit 300 also includes a foot pedal 308. The foot pedal is connected to the locking pin 3042 via a second pull rope (not shown in the figure) and a pulley block 3043. Applying force to the foot pedal 308 can pull the locking pin 3042 to slide and release the rotating rod 303. It is understood that the pulley block 3043 may include fixed pulleys or a combination of fixed and movable pulleys. The arrangement of the second pull rope and the pulley block 3043 can be configured according to actual needs and is not limited to that shown in the figure. This design is ergonomic, convenient to operate, and increases efficiency.

[0062] like Figure 3 , Figure 5 , Figure 7As shown, a second single-disc release mechanism 204 is further provided at the right end of the upper roller conveyor 201. The second single-disc release mechanism 204 includes a shaft 2041 and a second elastic element 2043. The axis of the shaft extends along the conveying direction of the upper roller conveyor 201. A stop 2042 is rotatably mounted on the shaft 2041. The stop 2042 is connected to the rotating rod 303 through a third pull rope (not shown in the figure) and a pulley group (not shown in the figure). When there is no external force, the stop 2042 is in a state of blocking the tray on the upper roller conveyor 201 from sliding down under the action of the second elastic element 2043. When the rotating rod 2041 rotates in the forward direction, the stop 2042 is pulled to rotate by the cooperation of the third pull rope and the pulley group, so that the stop 2042 releases the rightmost tray of the upper roller conveyor 201, allowing it to slide to the right. In one specific example, the top of the stop 2042 is equipped with a roller 20421. After the stop 2042 releases the pallet, the roller 20421 contacts the bottom of the pallet, allowing the pallet to slide smoothly. When the flip plate 301 returns to its original position and the rotating rod 303 rotates in the opposite direction, the stop 2042 loses external force. After one pallet passes, the stop 2042 resets under the action of the second elastic element 2043, preventing the following pallets from sliding downwards. Through the ingenious cooperation between the opening and closing locking device, the return device, and the second single-disc release mechanism 204, the pallets carrying parts on the upper roller conveyor 201 are automatically fed one-disc at a time, improving efficiency and reducing the physical labor of operators.

[0063] Preferably, the flip plate 301 is provided with a smooth strip 3011 that connects with the middle section transfer sliding unit, so that the pallet can slide in and out smoothly.

[0064] like Figures 8-10 As shown, in a specific embodiment, the tray 400 includes a lower base 401, an upper turntable 402, and a rotation limiter 403. The upper turntable 402 is rotatably connected to the lower base 401, and a material positioning structure is mounted on the upper turntable 402. The rotation limiter 403 is used to lock and release the relative position between the upper and lower turntables.

[0065] For example, the material positioning structure includes a positioning post 404 and a locking piece 405, used to stabilize the conveyed parts on the upper turntable 402. Since the material positioning structure is designed according to the structure of the conveyed parts and the direction in which they are picked up, the placement of the parts on the turntable has a fixed orientation. It should be noted that picking up large parts requires designing the gripping points according to the part's structure; otherwise, it is difficult to handle. Therefore, after the operator at the upper station places the part on the pallet, it is conveyed to the lower station. When the operator at the lower station picks up the part, they need to rotate the upper turntable 402 so that the gripping points on the part are aligned with them.

[0066] In one specific exemplary embodiment, the rotation limiter 403 is fixed to the edge of the upper turntable 402 and includes two parallel locking rods 4031 and two cooperating sleeves 4032. The sleeves 4032 are fixed to the upper turntable 402, and the locking rods 4031 can slide up and down along the sleeves 4032. When the locking rods 4031 slide to the lowest position, they abut against the edge of the lower chassis 401 to prevent the rotation of the upper turntable 402. When the locking rods 4031 are raised to a position higher than the lower turntable 401, the rotation of the upper turntable 402 is released. A spring (not shown in the figure) is provided between the locking rods 4031 and the sleeves 4032. When no external force is applied, the locking rods 4031 are held in the lowest position by the action of the spring. The upper turntable 402 reaches the locking position once every 180° rotation. The tops of the two locking levers 4031 are connected by a handle 4033. The operator can release the rotation of the upper turntable 402 by pulling the handle upwards. A rotating sliding surface 4011 is fixed on the lower chassis 401. When the operator pulls the handle 4033 upwards, the locking lever 4031 rises above the lower turntable 401. The operator then rotates the upper turntable 402, causing the bottom surface of the locking lever 4031 to slide on the rotating sliding surface 4011. After exceeding the rotating sliding surface 4011, the locking lever 4031 slides to its lowest position under the action of a spring, engaging with the edge of the lower chassis 401 to prevent the upper turntable 402 from rotating. At this point, the upper turntable 402 has rotated 180°. Preferably, the connection between the upper and lower trays relies on a steering mechanism in the third-generation lean pipe for rotation. The bottom of the lower tray is flat, and it is transported to the designated location via an inclined plane.

[0067] Preferably, the frame mechanical structure of this reciprocating conveyor is built with third-generation lean pipes, which streamlines the production process, improves the operation method of the conveying process of tools and parts, and optimizes the previously cumbersome process of conveying tools and parts, which involved bending over to lift heavy objects. The conveying process of tools and parts is more portable and reduces the physical burden.

[0068] The above are merely preferred embodiments of the present invention and are illustrative rather than restrictive. The structure and connection methods of the components in the present invention can be varied, and any equivalent transformations and improvements made based on the technical solution of the present invention should not be excluded from the protection scope of the present invention.

Claims

1. A reciprocating conveying device, characterized in that, Includes a left-end pallet lifting unit, a middle-section transfer sliding unit, a right-end unloading return unit, and a pallet; The middle section conveying sliding unit includes upper and lower roller tracks. The upper roller track slopes downward from left to right, and the lower roller track slopes downward from right to left. The left pallet lifting unit is connected to the left end of the middle transfer sliding unit, and includes a reciprocating lifting plate. The reciprocating lifting plate can reciprocate between a first position and a second position. In the first position, it is connected to the lower roller conveyor to receive empty pallets sliding down from the lower roller conveyor. In the second position, it is connected to the upper roller conveyor. After the material is placed on the pallet, the pallet enters the upper track and slides to the right under the action of gravity. The right-end unloading return unit is connected to the right end of the middle section transfer sliding unit, and includes a flipping plate and an opening and closing locking device. When the flipping plate is idle, it is connected to the upper roller conveyor and locked in position under the action of the opening and closing locking device. The pallet carrying the material slides from the upper roller conveyor to the flipping plate. After the material is unloaded, the opening and closing locking device is unlocked. Under the action of gravity, the flipping plate carrying the pallet flips downward and connects to the lower roller conveyor. The empty pallet slides to the left along the lower roller conveyor. The right-end unloading return unit also includes a right-end frame. The opening and closing locking device includes a rotating rod, a support rod, and a locking mechanism. The locking mechanism includes a locking sleeve and a locking pin. The flipping plate is hinged to the right-end frame. The locking sleeve is fixedly installed on the right-end frame. The locking pin is slidably connected to the locking sleeve. The rotating rod is fixedly connected to the support rod. The support rod supports the flipping plate. The rotating rod is rotatably connected to the right-end frame. When the rotating rod is prevented from rotating by the locking pin, the support rod is fixed in position, supporting the flipping plate in the position of docking with the upper roller conveyor. The locking pin slides relative to the locking sleeve, releasing the rotating rod, so that the flipping plate loses the support of the support rod and flips downward to dock with the lower roller conveyor.

2. The reciprocating conveying device as described in claim 1, characterized in that, The lower roller conveyor is provided with a first single-disc release mechanism at its left end. The left-end pallet lifting unit also includes a left-end frame, an electric push rod, a pulley block, and a first pull rope. The pulley block is installed on the left-end frame or on the left-end frame and the reciprocating lifting plate. The electric push rod is installed on the left-end frame, and the reciprocating lifting plate is slidably connected to the left-end frame along the longitudinal direction. The electric push rod acts as a power source to drive the first pull rope in conjunction with the pulley block to make the reciprocating lifting plate perform reciprocating lifting motion. During the descent of the reciprocating lifting plate, the first single-disc release mechanism is triggered, thereby releasing the leftmost pallet on the lower roller conveyor after the reciprocating lifting plate docks with the lower roller conveyor and preventing subsequent pallets from sliding down, so that a single pallet slides down onto the reciprocating lifting plate under the action of gravity; during the ascent of the reciprocating lifting plate, the first single-disc release mechanism is reset, so that subsequent pallets on the lower roller conveyor slide to the left to fill the empty space and then lock in position.

3. The reciprocating conveying device as described in claim 2, characterized in that, The first single-disc release mechanism includes a rotating shaft and a first elastic element. The axis of the rotating shaft extends along the conveying direction of the lower roller conveyor. A left stop and a right stop are fixedly spaced on the rotating shaft. The axes of the left stop and the right stop are perpendicular to each other. The distance between the left stop and the right stop is sufficient to accommodate a tray. A handle is fixed to the left end of the rotating shaft. A trigger rod is fixed to the reciprocating lifting plate. When the handle is not subjected to external force, the rotating shaft maintains the left stop bar in a vertical state under the action of the first elastic element, thereby blocking the leftmost tray on the lower roller conveyor; during the descent of the reciprocating lifting plate, the trigger rod presses down on the handle, thereby driving the rotating shaft to rotate, causing the left stop bar to rotate to a horizontal state and the right stop bar to rotate to a vertical state, thereby releasing the leftmost tray on the lower roller conveyor and blocking the adjacent right tray.

4. The reciprocating conveying device as described in claim 2, characterized in that, The left pallet lifting unit also includes a controller and a travel limit switch. The controller can adjust the running direction of the electric push rod, thereby controlling the movement direction of the reciprocating lifting plate. The travel limit switch is electrically connected to the controller. When the pallet on the lower roller conveyor slides onto the reciprocating lifting plate, the travel limit switch is triggered, and the controller controls the reciprocating lifting plate to rise. When the pallet carrying the material is pushed onto the upper roller conveyor, the travel limit switch is released, and the controller controls the reciprocating lifting plate to descend.

5. A reciprocating conveying device as described in claim 1, characterized in that, The right-end unloading return unit also includes a return device, which includes a balancer connected to the rotating rod. The tilting plate tilts downward under the weight of the pallet, causing the rotating rod to rotate in the forward direction and the balancer to store force. After the pallet slides into the lower roller conveyor, the tilting plate loses pressure, and the balancer pulls the rotating rod to rotate in the opposite direction, thereby causing the tilting plate to return to its original position and dock with the upper roller conveyor.

6. A reciprocating conveying device as described in claim 5, characterized in that, The locking mechanism further includes an elastic return member and a limiting mechanism. The limiting mechanism includes a limiting rod and a locking member. Under the action of the elastic return member, the locking pin is in a position that prevents the rotating rod from rotating. Under external force, when the locking pin slides to release the rotating rod, the locking member locks the position of the locking pin to prevent it from returning to its original position. During the process of the balancer pulling the rotating rod to rotate back to its original position, it eventually stops against the limiting rod. The limiting rod is subjected to force from the rotating rod, thereby releasing the locking member. In turn, the locking pin returns to the position that prevents the rotating rod from rotating forward under the action of the elastic return member.

7. A reciprocating conveying device as described in claim 6, characterized in that, The right-end unloading return unit also includes a foot pedal, which is connected to the locking pin via a second pull rope. Applying force to the foot pedal can pull the locking pin to slide and release the rotating rod.

8. A reciprocating conveying device as described in claim 6, characterized in that, A second single-disc release mechanism is provided at the right end of the upper roller conveyor. The second single-disc release mechanism includes a shaft and a second elastic element. The axis of the shaft extends along the conveying direction of the upper roller conveyor. A stop is rotatably mounted on the shaft. The stop is connected to the rotating rod via a third pull rope. When no external force is applied, the stop is in a state of blocking the tray on the upper roller conveyor from sliding down under the action of the second elastic element. When the rotating rod rotates in the forward direction, the stop is pulled by the third pull rope to rotate, causing the stop to release the rightmost tray of the upper roller conveyor, allowing it to slide to the right. The top of the stop is provided with a roller. After the stop releases the tray, the roller contacts the bottom of the tray, allowing the tray to slide down smoothly. When the flip plate returns to its original position and the rotating rod rotates in the opposite direction, the stop loses external force. After a tray passes by, the stop resets under the action of the second elastic element, preventing the following tray from sliding down.

9. A reciprocating conveying device as described in any one of claims 1-8, characterized in that, The tray includes a lower base, an upper turntable, and a rotation limiter. The upper turntable is rotatably connected to the lower base, and a material positioning structure is installed on the upper turntable. The rotation limiter is used to lock and release the relative position between the upper and lower turntables.

10. A reciprocating conveying device as described in claim 9, characterized in that, The material positioning structure includes a positioning post and a locking plate, used to stabilize the conveyed material on the upper turntable; the rotation limiter is fixed at the edge of the upper turntable, including two parallel locking rods and two cooperating sleeves, the sleeves are fixed on the upper turntable, and the locking rods can slide up and down along the sleeves; when the locking rod slides to the lowest position, it fits against the edge of the lower chassis to prevent the rotation of the upper turntable; when the locking rod is raised to a position higher than the lower turntable, it releases the rotation of the upper turntable. A spring is provided between the locking rod and the sleeve. When no external force is applied, the locking rod remains at the lowest position under the action of the spring. The upper turntable reaches the locking position once every 180° rotation. The tops of the two locking levers are connected by a handle.

11. A reciprocating conveying device as described in any one of claims 1-8, characterized in that, Both the flip plate and the reciprocating lifting plate are provided with smooth strips that connect with the middle section transfer sliding unit, so that the tray can slide in and out smoothly.

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