Self-limiting conveying, stacking device for insecticide iron can production

Abstract

The application discloses a self-limiting conveying and stacking device for insecticide iron can production and belongs to the technical field of iron can production equipment. The device comprises a conveying rail and a sliding block, the bottom of the sliding block is provided with a lifting cavity provided with a lifting plate and a supporting rod, the lifting cavity is communicated with a hydraulic cavity to realize lifting and stacking of a tray; a gear and two slidable sliding plates are arranged above the hydraulic cavity, and a limiter is mounted at the end of the sliding plate. The motor drives the gear to drive the sliding plate to move outward, the limiter is attached to the inner wall of the conveying rail to generate frictional resistance, the conveying mechanism is automatically limited, a buffer structure is arranged in the limiter to realize flexible deceleration, a throttle plate is adjusted by the gear linkage to adjust the hydraulic flow, and the tray discharging speed is adaptively changed. The application solves the problems of inaccurate positioning, easy can falling in emergency stop, no buffer and non-adjustable discharging speed of the existing iron can conveying and stacking device, has high automation degree, good stacking neatness, strong running stability and is suitable for automatic and continuous stacking operation of insecticide iron cans.

Description

Technical Field

[0001] This invention belongs to the technical field of tin can production equipment, specifically relating to a self-limiting conveying and stacking device for the production of insecticide tin cans. Background Technology

[0002] Insecticide tin cans are a type of aerosol metal packaging container, widely used in the packaging of pesticides and insecticides. After the cans are manufactured, they need to be transferred, unloaded at designated points, and stacked in multiple layers using conveying equipment to facilitate subsequent warehousing, packing, and shipping. Currently, insecticide tin can production lines are gradually achieving fully automated operation. Integrated conveying and stacking equipment has become the core equipment in the downstream production process, directly determining the overall efficiency of the production line and the stability of the can stacking.

[0003] Currently, various metal can conveying and stacking equipment are publicly available on the market, which can realize automated conveying and stacking of metal cans. However, in the actual production of pesticide cans, there are still common industry problems such as poor conveying positioning accuracy, stacking misalignment, sudden stop and tipping, the inability of the feeding speed to adapt to the can loading capacity, and severe structural wear. For example, CN114275533B discloses a metal can conveying system, which mainly includes a powered roller conveyor belt, an adsorption module, a template station conveyor belt, and a can-picking and flipping robot. It relies on the conveyor belt to realize the continuous conveying of metal cans, uses the template cavity at the station to limit and position individual cans, and cooperates with the robot to complete the can flipping and fixed-point feeding and stacking. This solution enables automated conveying, dust removal, and fixed-point stacking of metal cans, meeting the needs of continuous production and conveying of conventional empty metal cans. It is currently the mainstream automated conveying solution in the field of metal can conveying. However, this solution has significant technical shortcomings: First, the equipment relies solely on a fixed mold cavity to achieve single-sided can limiting. After the conveyor slider reaches the designated stacking position, there is no independent adaptive deceleration and limiting structure. When the conveyor belt stops abruptly, the cans are easily deflected and tipped over due to inertial impact. Insecticide cans are thin-walled metal cans with poor rigidity, and are prone to denting, deformation, and scrapping under sudden impact. Second, the equipment's unloading and lifting speed is fixed and cannot adaptively adjust the unloading rate according to the number of cans loaded on the pallet. Rapid unloading when the cans are full can easily cause the lower cans to be squeezed and deformed, while slow unloading when the cans are empty or lightly loaded significantly reduces the overall stacking efficiency. Third, the overall equipment structure is complex. The use of a robotic arm for gripping and transferring results in high equipment purchase and maintenance costs and occupies a large amount of production line space, making it unsuitable for large-volume, low-cost continuous stacking production scenarios for insecticide cans.

[0004] For example, CN214875957U discloses a canning conveying device with a limiting structure. Rigid limiting baffles are fixedly installed on both sides of the conveying track. The baffles on both sides limit the left and right movement of the canned container during the conveying process, preventing the can from shifting laterally. At the same time, it is equipped with an independent braking assembly to realize the fixed-point braking of the conveying mechanism, which meets the basic positioning requirements during the conveying of canned materials. The proposed solution adds a side-mounted limiting structure to the track, which solves the fundamental problem of lateral displacement during can transport. However, it still cannot meet the core requirements of pesticide can stacking operations: First, the limiting structure is a rigid fixed baffle without a buffer deceleration structure. When the conveying mechanism brakes at a fixed point, it is a hard emergency stop. The huge instantaneous resistance will directly cause the pesticide cans on the pallet to tip over and be misaligned, resulting in extremely poor stacking neatness. Second, the braking intensity is not adjustable, and it is impossible to adapt different deceleration forces according to the load of the pallet cans. The same braking parameters are used for both full-load and empty-load conditions. Either excessive braking will aggravate the wear and tear on the equipment structure, or insufficient braking will cause the workstation to shift. Third, the limiting braking mechanism and the hydraulic lifting stacking mechanism operate independently. There is no linkage control logic between the two mechanisms. There is a timing difference between the stacking and unloading actions and the conveying limiting actions. It is very easy for the conveying mechanism to not be completely locked after unloading, which will cause production accidents such as pallet displacement and stack collapse.

[0005] The existing technology has the following technical defects: Existing metal can conveying and stacking equipment either only has basic conveying and unloading functions without a self-adaptive and self-limiting deceleration structure, or it uses rigid limiting and hard braking methods without a buffer and pressure relief structure. Furthermore, the conveying limiting mechanism and the hydraulic stacking and lifting mechanism are independent of each other, making it impossible to achieve coordinated and adaptive adjustment. Considering the production characteristics of pesticide cans—thin-walled, easily deformable, and requiring large-scale continuous stacking—existing equipment generally suffers from inaccurate stacking station positioning, easy can tipping and deformation, lack of braking buffer, inability to adaptively adjust unloading speed and braking intensity according to can load, rapid equipment wear, and poor stacking neatness. These shortcomings make it difficult to meet the demands for high-precision, high-stability, and high-efficiency automated conveying and stacking production of pesticide cans. Summary of the Invention

[0006] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art and provide a self-limiting conveying and stacking device for the production of insecticide iron cans.

[0007] This invention discloses a self-limiting conveying and stacking device for producing insecticide tin cans, comprising a conveyor rail and a slider arranged opposite to each other. The slider is slidably connected to the inner side of the conveyor rail, and a lifting cavity is integrally formed at the bottom of the slider. A lifting plate is slidably connected to the inner wall of the lifting cavity, and a connecting rod is fixed to the bottom of the lifting plate. A support rod is integrally formed at the bottom end of the connecting rod. The insecticide tin can is placed on top of the two support rods via a tray. A hydraulic chamber is connected to the upper end of the lifting cavity via a pipe. The bottom of the hydraulic chamber is connected to an external hydraulic pump via a pipe. Sliding plates are slidably connected to the upper front and rear of the hydraulic chamber. A gear is rotatably connected to the upper end of the hydraulic chamber. Several tooth blocks are evenly arranged on the inner side of the sliding plate, and the tooth blocks mesh with the gear. The gear is fixedly connected to the output end of an external drive motor. Limiters are fixedly installed on the outer ends of the sliding plates.

[0008] The limiter includes a limiting cavity and a speed reduction plate. A pneumatic plate is slidably connected to the inner wall of the limiting cavity. A shaft is connected to the middle of the pneumatic plate for limiting. One end of the shaft is in contact with the inner side of the conveyor rail.

[0009] A spring is provided between one side of the air pressure plate and the inner wall of the limiting cavity, and the spring is sleeved on the outside of the shaft.

[0010] The air pressure plate has a U-shaped groove in the middle and the bottom of the limiting cavity. The shaft is slidably connected in the U-shaped groove. A spring is provided on the outer side of one end of the shaft, and the outer side of the spring is in contact with the inner wall of the limiting cavity.

[0011] Two limiting discs are provided on the outer side of the shaft, and the limiting discs and the air pressure plate limit each other. The center of the limiting disc is eccentric to the center of the shaft.

[0012] In its initial state, the limiting plate covers half the length of the U-shaped groove, meaning the U-shaped groove is connected to the upper and lower parts of the air pressure plate.

[0013] The gear has a central shaft integrally formed below it, which is rotatably connected to the hydraulic chamber. A spiral groove is provided on the outer side of the central shaft. A throttling plate is slidably connected to the inner wall of the hydraulic chamber. A through hole is provided in the middle of the throttling plate, and the central shaft is inserted into the through hole.

[0014] The inner wall of the through hole is rolled with ball bearings, which are rolled within the spiral groove; the pipe connection between the lifting chamber and the hydraulic chamber is in contact with the outer side of the throttling plate, and a spring is provided between the throttling plate and the bottom of the inner wall of the hydraulic chamber.

[0015] Compared with the prior art, the beneficial effects of the present invention are: This invention can automatically and accurately limit positioning, resulting in neat and stable stacking. After the device is delivered to the correct position, it can autonomously complete friction limiting without the need for additional braking components. This effectively prevents the conveyor slider from shifting, avoids pallet misalignment and can tipping, and significantly improves the neatness and overall stability of iron can stacking. Flexible buffer deceleration protects the can from damage. The limit mechanism is equipped with springs, spring sheets and pneumatic buffer structure to achieve flexible deceleration and braking, abandoning the traditional hard emergency stop method, eliminating the inertial impact of sudden stop, and avoiding tilting, deformation and damage to thin-walled insecticide cans. The braking intensity is adjustable, reducing equipment wear. The limit friction resistance can be flexibly adjusted according to the loading capacity of the pallet tank. The braking effect is enhanced under heavy load, and the squeezing force is reduced under light load, avoiding ineffective friction loss and effectively extending the service life of equipment parts. The structure is linked and controlled, taking into account both efficiency and stability. The limit drive mechanism is linked with the hydraulic lifting mechanism, which can automatically adjust the hydraulic feeding speed according to the load of the tank. Slow feeding under heavy load ensures safety, while fast feeding under light load improves work efficiency, resulting in higher overall automated operation efficiency. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the internal structure of the hydraulic chamber, lifting chamber, and limiting chamber of the present invention; Figure 3 This is an exploded view of the present invention; Figure 4 This is the front view of the present invention; Figure 5 This is a top view of the present invention; Figure 6 This is a schematic diagram showing the relative positions of the spring, shaft, and pneumatic plate of the present invention; Figure 7 This is a schematic diagram showing the installation positions of the spiral groove and the ball bearings in this invention.

[0017] In the diagram: 1. Conveyor rail; 2. Slider; 3. Shrapnel; 4. Lifting chamber; 41. Lifting plate; 42. Connecting rod; 43. Support rod; 5. Hydraulic chamber; 51. Slide plate; 52. Gear; 53. Central shaft; 531. Spiral groove; 54. Throttling plate; 541. Ball bearing; 55. Spring II; 6. Limiting cavity; 61. Speed ​​reduction plate; 62. Air pressure plate; 63. Shaft; 631. Limiting disc; 64. Spring 1; 65. U-shaped groove. Detailed Implementation

[0018] Example 1 like Figures 1 to 7 As shown, a self-limiting conveying and stacking device for the production of insecticide cans includes a conveying rail 1 and a slider 2 arranged opposite to each other. The slider 2 is slidably connected to the inner side of the conveying rail 1, and the bottom of the slider 2 is integrally formed with a lifting cavity 4. A lifting plate 41 is slidably connected to the inner wall of the lifting chamber 4. A connecting rod 42 is fixed to the bottom of the lifting plate 41. A support rod 43 is integrally formed at the bottom end of the connecting rod 42. The insecticide can is placed on top of the two support rods 43 via a tray. A hydraulic chamber 5 is connected to the upper end of the lifting chamber 4 via a pipe. The bottom of the hydraulic chamber 5 is connected to an external hydraulic pump via a pipe. A sliding plate 51 is slidably connected to the upper part of the hydraulic chamber 5 both front and back. A gear 52 is rotatably connected to the upper end of the hydraulic chamber 5. Several tooth blocks are evenly arranged on the inner side of the sliding plate 51, and the tooth blocks mesh with the gear 52. The gear 52 is fixedly connected to the output end of an external drive motor. Limiters are fixedly installed on the outer end of the sliding plate 51. The insecticide can is placed on a tray, which is then placed on two support rods 43. The slider 2 is then conveyed via the conveyor rail 1. The slider 2 moves the lifting plate 41 via the lifting chamber 4. The lifting plate 41 moves the support rods 43 via the connecting rod 42, thereby moving the insecticide can. When it reaches the designated position, the external hydraulic pump injects liquid into the hydraulic chamber 5 through a pipe, and then into the lifting chamber 4 through a pipe. The hydraulic pressure pushes the lifting plate 41 to slide down along the inner wall of the lifting chamber 4. The connecting rod 42 moves the support rods 43 down, thus placing the tray containing the insecticide can. The above operation is repeated to stack the trays containing the insecticide cans. The operation is automated and the stacking efficiency is high. As the conveyor moves to the designated position, the conveyor rail 1 stops the slider 2 and the support rod 43. At this time, the external drive motor runs, driving the gear 52 to rotate. The gear 52 meshes with the tooth block, causing the slide plate 51 to slide to both sides on the hydraulic chamber 5. This causes the limiter to contact and squeeze against the inner side of the conveyor rail 1, thereby generating resistance and automatically limiting the conveying of the insecticide cans. This makes the stacking more neat and prevents the pallets from being misaligned, causing instability and falling.

[0019] The limiter includes a limiting cavity 6 and a deceleration plate 61. A pneumatic plate 62 is slidably connected to the inner wall of the limiting cavity 6. A shaft 63 is connected to the middle of the pneumatic plate 62 for limiting. One end of the shaft 63 is in contact with the inner side of the conveying rail 1.

[0020] A spring 64 is provided between one side of the pneumatic plate 62 and the inner wall of the limiting cavity 6, and the spring 64 is sleeved on the outside of the shaft 63. After the slide plate 51 moves to both sides, it drives the deceleration plate 61 to contact the inner side of the conveyor rail 1 through the limiting cavity 6, and they squeeze and rub against each other. At the same time, the friction and resistance cause the deceleration plate 61 to be under force, and through the shaft 63, it drives the air pressure plate 62 to slide along the inner wall of the limiting cavity 6. The spring 64 is deformed under force and generates a reaction force, so that when the deceleration plate 61 rubs against the inner wall of the conveyor rail 1 and generates resistance, it plays a buffering role, avoiding the sudden high-intensity deceleration that would cause the insecticide cans on the pallet to fall over, and improving the stability of the conveyor cans.

[0021] U-shaped grooves 65 are provided in the middle of the air pressure plate 62 and at the bottom of the limiting cavity 6. The shaft 63 is slidably connected in the U-shaped groove 65. A spring piece 3 is provided on the outer side of one end of the shaft 63, and the outer side of the spring piece 3 is in contact with the inner wall of the limiting cavity 6. When the sliding plate 51 drives the deceleration plate 61 to squeeze and rub against the inner side of the conveyor rail 1 through the limiting cavity 6, the deceleration plate 61 and the inner side of the conveyor rail 1 generate an interaction force, causing the deceleration plate 61 to slide in the U-shaped groove 65 through the shaft 63. At the same time, one end of the shaft 63 squeezes the spring piece 3 and generates a reaction force, thereby reducing the squeezing force between the deceleration plate 61 and the inner side of the conveyor rail 1, further reducing the strength during limiting, thereby further improving the buffer strength, effectively preventing the insecticide can from falling off the pallet, and greatly improving the transportation efficiency. Simultaneously, by controlling the rotation angle of the external drive motor, the displacement distance of the slide plate 51 is controlled through the gear 52 transmission, thereby controlling the squeezing force between the deceleration plate 61 and the inner side of the conveyor rail 1. The deceleration intensity during the limit is precisely controlled. When there are many insecticide cans on the tray, its stability is relatively high, thereby reducing the rotation angle of the external drive motor and the deceleration intensity can be relatively high. Conversely, the deceleration intensity is increased, which can not only fully prevent the insecticide cans from falling, but also reduce the wear between structures, thereby increasing the service life of the structure.

[0022] Two limiting discs 631 are provided on the outer side of the shaft 63, and the limiting discs 631 and the air pressure plate 62 limit each other. The center of the limiting disc 631 is eccentric to the center of the shaft 63.

[0023] In its initial state, the limiting plate 631 covers half the length of the U-shaped groove 65, meaning that the U-shaped groove 65 is connected to the upper and lower parts of the air pressure plate 62. As the shaft 63 shifts, the coverage area of ​​its limiting plate 631 over the U-shaped groove 65 gradually increases, thereby reducing the gap between the U-shaped groove 65 and the upper and lower parts of the pneumatic plate 62. When the pneumatic plate 62 slides along the inner wall of the limiting cavity 6, the flow rate of the gas in the gap is adjusted, thereby further controlling the friction and resistance intensity between the deceleration plate 61 and the inner side of the conveying rail 1. When there are many insecticide cans on the pallet, the resistance when the pneumatic plate 62 moves is relatively large, and the friction and resistance intensity increase, thereby further strengthening the deceleration intensity during limiting to fully stabilize the insecticide cans on the pallet and make the stacking more neat. Conversely, reducing the deceleration intensity during limiting means that there are fewer insecticide cans on the pallet, and the weight is lighter. After stopping, there will be no large error, which can ensure the limiting effect and further reduce the wear of the deceleration plate 61.

[0024] A central shaft 53 is integrally formed below the gear 52. The central shaft 53 is rotatably connected to the hydraulic chamber 5. A spiral groove 531 is provided on the outer side of the central shaft 53. A throttle plate 54 is slidably connected to the inner wall of the hydraulic chamber 5. A through hole is provided in the middle of the throttle plate 54, and the central shaft 53 is inserted into the through hole.

[0025] The inner wall of the through hole is connected to a ball bearing 541, which is rolled within the spiral groove 531. The pipe connection between the lifting chamber 4 and the hydraulic chamber 5 is in contact with the outer side of the throttle plate 54. A spring 55 is provided between the throttle plate 54 and the bottom of the inner wall of the hydraulic chamber 5. As the external drive motor rotates, the gear 52 drives the central shaft 53 to rotate. When the central shaft 53 rotates, the ball bearings 541 roll in the spiral groove 531 and generate axial force. This causes the throttle plate 54 to move up and down through the ball bearings 541 and slide along the inner wall of the hydraulic chamber 5. The spring 55 deforms under the force. When there are many pesticide cans on the pallet, the axial force between the ball bearings 541 and the spiral groove 531 causes the throttle plate 54 to move downward. The flow rate of the liquid entering the lifting chamber 4 through the pipe is reduced, and the speed of the pesticide cans on the pallet is relatively more stable when they fall down, so as to fully prevent the pesticide cans from falling over and further enhance stability. Conversely, when there are fewer pesticide cans on the pallet, the descent speed is faster, thereby improving stacking efficiency and speeding up transportation efficiency.

[0026] The descriptions of the orientation and relative positional relationships of the structures in this invention, such as front, back, left, right, up, and down, do not constitute a limitation of this invention, but are merely for the convenience of description.

Claims

1. A self-limiting conveying and stacking device for the production of insecticide tin cans, comprising a conveying rail (1) and a slider (2) arranged opposite to each other, characterized in that: The slider (2) is slidably connected to the inner side of the conveying rail (1), and the bottom of the slider (2) is integrally formed with a lifting cavity (4). The inner wall of the lifting chamber (4) is slidably connected to a lifting plate (41). A connecting rod (42) is fixed to the bottom of the lifting plate (41). A support rod (43) is integrally formed at the bottom end of the connecting rod (42). The insecticide can is placed on top of the two support rods (43) via a tray. A hydraulic chamber (5) is connected between the upper ends of the lifting chamber (4) via a pipe. The bottom of the hydraulic chamber (5) is connected to an external hydraulic pump via a pipe. A sliding plate (51) is slidably connected to the upper front and back of the hydraulic chamber (5). A gear (52) is rotatably connected to the upper end of the hydraulic chamber (5). Several tooth blocks are evenly arranged on the inner side of the sliding plate (51), and the tooth blocks mesh with the gear (52). The gear (52) is fixedly connected to the output end of an external drive motor. Limiters are fixedly installed on the outer ends of the sliding plate (51).

2. The self-limiting conveying and stacking device for pesticide can production according to claim 1, characterized in that: The limiter includes a limiting cavity (6) and a deceleration plate (61). A pneumatic plate (62) is slidably connected to the inner wall of the limiting cavity (6). A shaft (63) is connected to the middle of the pneumatic plate (62). One end of the shaft (63) is in contact with the inner side of the conveying rail (1).

3. The self-limiting conveying and stacking device for pesticide can production according to claim 2, characterized in that: A spring (64) is provided between one side of the air pressure plate (62) and the inner wall of the limiting cavity (6), and the spring (64) is sleeved on the outside of the shaft (63).

4. The self-limiting conveying and stacking device for pesticide can production according to claim 3, characterized in that: U-shaped grooves (65) are provided in the middle of the air pressure plate (62) and at the bottom of the limiting cavity (6). The shaft (63) is slidably connected in the U-shaped groove (65). A spring piece (3) is provided on the outer side of one end of the shaft (63), and the outer side of the spring piece (3) is in contact with the inner wall of the limiting cavity (6).

5. The self-limiting conveying and stacking device for pesticide can production according to claim 4, characterized in that: Two limiting discs (631) are provided on the outer side of the shaft (63), and the limiting discs (631) and the air pressure plate (62) limit each other. The center of the limiting discs (631) is eccentric to the center of the shaft (63).

6. The self-limiting conveying and stacking device for pesticide can production according to claim 5, characterized in that: In its initial state, the limiting plate (631) covers half the length of the U-shaped groove (65), meaning that the U-shaped groove (65) is connected to the upper and lower parts of the air pressure plate (62).

7. The self-limiting conveying and stacking device for pesticide can production according to claim 6, characterized in that: The gear (52) has a central shaft (53) integrally formed below it. The central shaft (53) is rotatably connected to the hydraulic cavity (5). The outer side of the central shaft (53) is provided with a spiral groove (531). The inner wall of the hydraulic cavity (5) is slidably connected with a throttle plate (54). The throttle plate (54) has a through hole in the middle, and the central shaft (53) is inserted into the through hole.

8. The self-limiting conveying and stacking device for pesticide can production according to claim 7, characterized in that: The inner wall of the through hole is rolled with a ball (541), which is rolled in the spiral groove (531). The connection between the lifting chamber (4) and the hydraulic chamber (5) is in contact with the outer side of the throttle plate (54), and a spring (55) is provided between the throttle plate (54) and the bottom of the inner wall of the hydraulic chamber (5).

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