Centering clamping mechanism for dry ice bag

Abstract

The utility model relates to the technical field of dry ice bag boxing, in particular to a centering clamping mechanism for dry ice bags, which comprises a clamping seat, a gear rotating shaft through hole is arranged on the clamping seat, a gear component is arranged in the gear rotating shaft through hole, and the gear component is driven by a motor arranged on the outer side of the clamping seat. A left push rod through hole and a right push rod through hole which can penetrate through the gear rotating shaft through hole are symmetrically formed in the left side and the right side of the clamping base, a left push rod is movably arranged in the left push rod through hole in a sleeved mode, and the left end of the left push rod is connected with a left clamping plate; a right push rod is movably sleeved with the right push rod through hole, and the right end of the right push rod is connected with the right clamping plate. The left push rod and the right push rod are driven by the gear assembly to move in opposite directions, and a material clamping position is formed between the left clamping plate and the right clamping plate. The centering clamping mechanism is simple in structure, good in control effect, small in external influence and capable of achieving accurate centering grabbing or loosening of the dry ice bag.

Description

Technical Field

[0001] This utility model relates to the field of dry ice bag packing technology, and in particular to a centering and clamping mechanism for dry ice bags. Background Technology

[0002] Dry ice packs are refrigeration devices that use solid carbon dioxide (dry ice) as the refrigerant. Dry ice blocks are packaged in individual bags and are primarily used to maintain extremely low temperatures for short periods to preserve items requiring deep freezing (such as fresh food, medical samples, vaccines, and biological agents). They are commonly used in the cold chain transportation industry for food and pharmaceuticals, offering both high-efficiency cold preservation and environmentally friendly, residue-free characteristics. After being packaged on the production line, the dry ice blocks still need to be placed in insulated boxes for storage. Currently, this step is done manually, which is inefficient and inefficient, and labor costs are high.

[0003] Chinese utility model patent CN220221310U discloses an automated dry ice packing system, including a feeding conveyor line, a chain conveyor frame at one end of the feeding conveyor line, a processing table next to the chain conveyor frame, a handling robot on a handling platform next to the processing table, and box guide plates on both sides of the handling platform. A material box is slidably mounted inside the box guide plate. Protective railings are provided on the outer sides of the chain conveyor frame, processing table, handling platform, and box guide plates. This utility model uses the feeding conveyor line and chain conveyor frame to horizontally transport dry ice bags. Then, a certain number of dry ice bags are grabbed and moved to the processing table by the transverse conveying mechanism on the chain conveyor frame. Finally, the handling robot on the handling platform next to the processing table moves the products into the material box, completing the active packing of dry ice bags. Using this equipment can free up operators, who only need to change the material box, resulting in high packing efficiency.

[0004] The handling robot is mainly used to move dry ice packs from the worktable to the container for packing. However, using a standalone handling robot is expensive and takes up considerable space. While the specific gripper structure at the end of the robot for grasping the dry ice packs is not described, the most common type on the market is a synchronous cylinder gripper. This gripper uses two cylinders to drive the left and right grippers, which move synchronously in opposite directions via left and right push plates, causing the grippers to open and close symmetrically. Because of the dual-cylinder structure, if the retraction speed of the two cylinders or the air pressure in the air circuit is inconsistent, the workpiece cannot be stably centered, resulting in a "left-right offset" problem. That is, the difference in cylinder retraction speed will cause the workpiece to deviate to the slower side, and slight external thrust or mechanical inertia may disrupt the force balance, causing the grippers and workpiece to move as a whole, forming a new unstable balance. This makes it impossible to center the dry ice packs, which in turn prevents them from being accurately stacked at the designated coordinates during subsequent packing.

[0005] In addition, due to the characteristics of dry ice packs, the synchronizing cylinder grippers need to overcome the problems of low temperature and sublimation when gripping dry ice packs. Low temperature environment can easily cause the air passage of the synchronizing cylinder grippers to freeze or become blocked, and the gaseous carbon dioxide produced by the sublimation of dry ice may enter the cylinder, causing damage to the seals or instability of the air pressure system.

[0006] Therefore, a new technical solution is urgently needed to solve the above-mentioned technical problems. Utility Model Content

[0007] The purpose of this utility model is to overcome the problems of the prior art and provide a centering clamping mechanism for dry ice bags. This mechanism addresses the technical problems of existing dry ice bag packing systems, which use expensive independent handling robots and synchronous cylinder grippers. If the retraction speed of the two cylinders or the air pressure in the air circuit is inconsistent, the workpiece cannot be stably centered, resulting in a "left-right offset". It also addresses the technical problem that the air circuit is easily affected by the low temperature and sublimation of the dry ice bag.

[0008] The above objectives are achieved through the following technical solutions:

[0009] A centering clamping mechanism for dry ice bags includes a clamping seat with a gear shaft through hole and a gear assembly disposed within the gear shaft through hole. The gear assembly is driven by a motor disposed outside the clamping seat. The clamping seat has symmetrically arranged left and right push rod through holes on its left and right sides, each penetrating the gear shaft through hole. A left push rod is movably fitted within the left push rod through hole, and its left end is connected to a left clamping plate. A right push rod is movably fitted within the right push rod through hole, and its right end is connected to a right clamping plate. The left and right push rods move in opposite directions under the drive of the gear assembly, forming a clamping position between the left and right clamping plates.

[0010] Furthermore, the left push rod through hole includes a left push rod upper through hole and a left push rod lower through hole arranged vertically in parallel; the right push rod through hole includes a right push rod upper through hole and a right push rod lower through hole arranged vertically in parallel; the left push rod upper through hole and the right push rod upper through hole are horizontal; the left push rod includes a left upper push rod that can be movably fitted into the left push rod upper through hole and a left lower push rod that can be movably fitted into the left push rod lower through hole; the right push rod includes a right upper push rod that can be movably fitted into the right push rod upper through hole and a right lower push rod that can be movably fitted into the right push rod lower through hole; the left ends of the left upper push rod and the left lower push rod are respectively connected to the left clamping plate; the left ends of the right upper push rod and the right lower push rod are respectively connected to the right clamping plate.

[0011] Furthermore, a right guide through hole is provided between the upper through hole of the left push rod and the lower through hole of the left push rod, which allows the right guide rod to be movably fitted; a left guide through hole is also provided between the upper through hole of the right push rod and the lower through hole of the right push rod, which allows the left guide rod to be movably fitted; the left end of the left guide rod is connected to the left clamping plate, and the right end of the right guide rod is connected to the right clamping plate.

[0012] Furthermore, the gear assembly includes a gear shaft, and the gear shaft is movably connected to the upper and lower openings of the gear shaft through hole by ball bearings; a synchronizing gear is provided on the gear shaft corresponding to the positions of the left push rod and the right push rod.

[0013] Furthermore, the synchronizing gear includes an upper synchronizing gear corresponding to the upper left push rod and the upper right push rod, and a lower synchronizing gear corresponding to the lower left push rod and the lower right push rod.

[0014] Furthermore, the upper left push rod and the upper right push rod are respectively provided with upper push rod tooth paths that can mesh with the upper synchronous gear, and the lower left push rod and the lower right push rod are respectively provided with lower push rod tooth paths that can mesh with the lower synchronous gear.

[0015] Furthermore, the motor is fixed by a motor bracket located on the top of the clamping seat, and the motor shaft is fixedly connected to the top end of the gear shaft via a coupling.

[0016] Furthermore, the motor is a servo motor.

[0017] Furthermore, the left clamp and the right clamp are identical in specifications, each including a push rod connecting part, a bending part, and a clamping part, with the angle between the push rod connecting part and the bending part, and the angle between the bending part and the clamping part, being 90° to 145°.

[0018] This invention provides a centering and clamping mechanism for dry ice packs. A motor-driven gear assembly drives the left and right push rods to move synchronously in opposite directions, indirectly achieving synchronous control of the left and right clamping plates. This centering and clamping mechanism is not only simple in structure but also has good control performance, is less affected by external factors, and can achieve precise centering, gripping, and releasing of the dry ice pack. Attached Figure Description

[0019] Figure 1 This is a first-view structural schematic diagram of a centering clamping mechanism for dry ice bags according to the present invention.

[0020] Figure 2 This is a second-view structural schematic diagram of a centering clamping mechanism for dry ice bags according to the present invention;

[0021] Figure 3This is a first-view sectional view of a centering clamping mechanism for dry ice bags according to the present invention.

[0022] Figure 4 This is a second-view sectional view of a centering clamping mechanism for dry ice bags according to the present invention.

[0023] Figure 5 This is a first-view structural diagram of the clamping seat in the centering clamping mechanism for dry ice bags according to the present invention.

[0024] Figure 6 This is a second-view structural diagram of the clamping seat in the centering clamping mechanism for dry ice bags according to the present invention;

[0025] Figure 7 This is a schematic diagram of the random meshing of the push rod and the synchronizing gear in the centering and clamping mechanism for dry ice bags described in this utility model.

[0026] Illustration markings:

[0027] 1-Clamping seat, 101-Gear shaft through hole, 102-Left push rod through hole, 103-Right push rod through hole, 104-Left push rod upper through hole, 105-Left push rod lower through hole, 106-Right push rod upper through hole, 107-Right push rod lower through hole, 108-Left guide through hole, 109-Right guide through hole;

[0028] 2-Gear assembly, 201-Gear shaft, 202-Shaft ball bearing, 203-Synchronizer gear, 204-Upper synchronizer gear, 205-Lower synchronizer gear;

[0029] 3-Motor;

[0030] 4-Left push rod, 401-Upper left push rod, 402-Lower left push rod;

[0031] 5 - Right push rod, 501 - Upper right push rod, 502 - Lower right push rod;

[0032] 6-Left clamping plate, 7-Right clamping plate, 8-Left guide rod, 9-Right guide rod, 10-Upper push rod tooth path, 11-Lower push rod tooth path, 12-Clamping position, 13-Push rod connection part, 14-Bending part, 15-Clamping part, 16-Motor bracket, 17-Weight reduction hole, 18-Through hole. Detailed Implementation

[0033] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. The described embodiments are merely some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0034] like Figures 1-4 As shown, this solution provides a centering clamping mechanism for dry ice bags, including a clamping seat 1. The clamping seat 1 has a gear shaft through hole 101, and a gear assembly 2 is provided in the gear shaft through hole 101. The gear assembly 2 is driven to rotate clockwise or counterclockwise by a motor 3 located on the outside of the clamping seat 1.

[0035] The clamping seat 1 has symmetrically provided left push rod through holes 102 and right push rod through holes 103 on its left and right sides, which can pass through the gear shaft through hole 101. A left push rod 4 is movably sleeved in the left push rod through hole 102, and the left end of the left push rod 4 is connected to the left clamping plate 6. A right push rod 5 is movably sleeved in the right push rod through hole 103, and the right end of the right push rod 5 is connected to the right clamping plate 7. The left push rod 4 and the right push rod 5 move in opposite directions under the drive of the gear assembly 2, and a clamping position 12 is formed between the left clamping plate 6 and the right clamping plate 7.

[0036] Working principle:

[0037] Before clamping the dry ice bag, the motor 3 drives the gear assembly 2 to rotate clockwise. The gear assembly 2 applies rotational force to the left push rod 4 and the right push rod 5 connected to it. The left push rod 4 and the right push rod 5 drive the left clamping plate 6 and the right clamping plate 7 connected to them to move away in opposite directions. At this time, the feeding area becomes larger, which makes it easier to clamp several dry ice bags stacked in the center on the centering platform.

[0038] When clamping the dry ice bags on both sides, the motor 3 drives the gear assembly 2 to rotate counterclockwise. The gear assembly 2 applies rotational force to the left push rod 4 and the right push rod 5, which are connected to it. The left push rod 4 and the right push rod 5 drive the left clamping plate 6 and the right clamping plate 7, which are connected to it, to move towards each other. At this time, the area of ​​the feeding position becomes smaller, realizing the centering and tightening of the two sides of the dry ice bags stacked on the centering platform. This facilitates the centering and clamping of the dry ice bags stacked on the centering platform for subsequent material transfer and boxing operations.

[0039] It should be noted that the driving direction of the gear assembly 2 on the left push rod 4 and the right push rod 5 when rotating clockwise or counterclockwise in this embodiment can also be changed according to the actual structure, and can do the opposite of the working principle described above, which is also within the protection scope of this solution.

[0040] It should be noted that, to further reduce the weight of this device, weight reduction holes 17 can be symmetrically opened on the clamping seat 1.

[0041] like Figures 3-6As shown, the left push rod through hole 102 includes a left push rod upper through hole 104 and a left push rod lower through hole 105 arranged vertically in parallel. The right push rod through hole 103 includes a right push rod upper through hole 106 and a right push rod lower through hole 107 arranged vertically in parallel. The left push rod upper through hole 104 and the right push rod upper through hole 106 are horizontal, and the left push rod lower through hole 105 and the right push rod lower through hole 107 are horizontal.

[0042] The left push rod 4 includes an upper left push rod 401 that can be movably fitted by the upper through hole 104 of the left push rod, and a lower left push rod 402 that can be movably fitted by the lower through hole 105 of the left push rod.

[0043] The right push rod 5 includes an upper right push rod 501 that can be movably fitted by the upper through hole 106 of the right push rod, and a lower right push rod 502 that can be movably fitted by the lower through hole 107 of the right push rod.

[0044] The left ends of the upper left push rod 401 and the lower left push rod 402 are respectively connected to the left clamping plate 6;

[0045] The left ends of the upper right push rod 501 and the lower right push rod 502 are respectively connected to the right clamping plate 7.

[0046] In this embodiment, by providing the left clamping plate 6 with a vertically parallel upper left push rod 401 and a vertically parallel lower left push rod 402, and the right clamping plate 7 with a vertically parallel upper right push rod 501 and a vertically parallel lower right push rod 502, the left clamping plate 6 and the right clamping plate 7 can be stably fixed, so that they can better tighten and clamp the two sides of the dry ice bag, and are not prone to shaking or loosening.

[0047] In addition, a right guide through hole 109 is provided between the upper through hole 104 of the left push rod and the lower through hole 105 of the left push rod, which can movably fit the right guide rod 9.

[0048] A left guide through hole 108 is also provided between the upper through hole 106 and the lower through hole 107 of the right push rod, which can movably fit the left guide rod 8.

[0049] The left end of the left guide rod 8 is connected to the left clamping plate 6, and the right end of the right guide rod 9 is connected to the right clamping plate 7.

[0050] This embodiment, by setting the left guide rod 8 and the right guide rod 9, can better guide the movement of the left clamping plate 6 and the right clamping plate 7 smoothly, making the clamping process of this centering clamping mechanism smoother.

[0051] like Figure 3 , Figure 4 and Figure 7As shown, in this embodiment, the gear assembly 2 includes a gear shaft 201, and the gear shaft 201 is movably connected to the upper and lower openings of the gear shaft through hole 101 by a shaft ball bearing 202.

[0052] A synchronizing gear 203 is provided on the gear shaft 201 corresponding to the positions of the left push rod 4 and the right push rod 5. The rotation of the synchronizing gear 203 drives the left push rod 4 and the right push rod 5 to move in opposite directions, thereby achieving the centering and clamping or releasing of the dry ice pack.

[0053] The synchronizing gear 203 includes an upper synchronizing gear 204 corresponding to the upper left push rod 401 and the upper right push rod 501, and a lower synchronizing gear 205 corresponding to the lower left push rod 402 and the lower right push rod 502.

[0054] Specifically, in this embodiment, the upper left push rod 41 and the upper right push rod 501 are arranged parallel to each other on the front and rear sides of the upper synchronous gear 204. Under the rotational drive of the upper synchronous gear 204, the upper left push rod 401 and the upper right push rod 501 can move in opposite directions.

[0055] The lower left push rod 402 and the lower right push rod 502 are arranged parallel to each other on the front and rear sides of the lower synchronizing gear 205. Under the rotational drive of the lower synchronizing gear 205, the lower left push rod 402 and the lower right push rod 502 can move in opposite directions.

[0056] Since the upper synchronous gear 204 and the lower synchronous gear 205 rotate synchronously under the drive of the same gear shaft 201, they can drive the upper left push rod 401 and the lower left push rod 402 to move synchronously in opposite directions relative to the upper right push rod 501 and the lower right push rod 502.

[0057] The upper left push rod 401 and the upper right push rod 501 are each provided with an upper push rod tooth path 10 that can mesh with the upper synchronous gear 204, and the lower left push rod 402 and the lower right push rod 502 are each provided with a lower push rod tooth path 11 that can mesh with the lower synchronous gear 205. Through the meshing mechanism of the synchronous gear and the tooth path, the translation of the push rod with the tooth path can be achieved by the rotation of the gear.

[0058] In this embodiment, the motor 3 is fixed by a motor bracket 16 set on the top of the clamping seat 1, and the rotating shaft of the motor 3 is fixedly connected to the top end of the gear rotating shaft 201 through a coupling.

[0059] As a specific embodiment of this solution, the motor 3 is a servo motor, which can perform precise rotation control according to the number of dry ice bags to be clamped, and indirectly realize the precise centering adjustment of the clamping position 12 between the left clamping plate 6 and the right clamping plate 7.

[0060] like Figure 3 As shown, in this embodiment, the left clamping plate 6 and the right clamping plate 7 have the same specifications, both including a push rod connecting part 13, a bending part 14, and a clamping part 15. The angle between the push rod connecting part 13 and the bending part 14, and between the bending part 14 and the clamping part 15, is 90° to 145°. By setting the bending part 14 to form an elastic connection, the dry ice bag can be better clamped, preventing the dry ice bag from breaking due to excessive strength during clamping.

[0061] It should be further explained that, in order to prevent the left push rod 4, right push rod 5, left guide rod 8 and right guide rod 9 from being blocked when the left clamping plate 6 and the right clamping plate 7 are close to each other, this embodiment also provides through holes 18 on the push rod connecting part 13 to facilitate unobstructed passage.

[0062] The above description is only for illustrating the embodiments of this utility model and is not intended to limit this utility model. For those skilled in the art, any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A centering and clamping mechanism for dry ice bags, characterized in that, Includes a clamping seat (1), on which a gear shaft through hole (101) is provided, and a gear assembly (2) is provided in the gear shaft through hole (101), and the gear assembly (2) is driven by a motor (3) provided on the outside of the clamping seat (1); The clamping seat (1) has symmetrical openings on its left and right sides, including a left push rod through hole (102) and a right push rod through hole (103) that can pass through the gear shaft through hole (101). A left push rod (4) is movably fitted in the left push rod through hole (102), and the left end of the left push rod (4) is connected to the left clamping plate (6). A right push rod (5) is movably fitted in the right push rod through hole (103), and the right end of the right push rod (5) is connected to the right clamping plate (7). The left push rod (4) and the right push rod (5) move in opposite directions under the drive of the gear assembly (2), and a clamping position (12) is formed between the left clamping plate (6) and the right clamping plate (7).

2. The centering and clamping mechanism for dry ice bags according to claim 1, characterized in that, The left push rod through hole (102) includes a left push rod upper through hole (104) and a left push rod lower through hole (105) arranged vertically in parallel. The right push rod through hole (103) includes a right push rod upper through hole (106) and a right push rod lower through hole (107) arranged vertically in parallel. The left push rod upper through hole (104) and the right push rod upper through hole (106) are horizontal, and the left push rod lower through hole (105) and the right push rod lower through hole (107) are horizontal. The left push rod (4) includes an upper left push rod (401) that can be movably fitted by the upper through hole (104) of the left push rod, and a lower left push rod (402) that can be movably fitted by the lower through hole (105) of the left push rod. The right push rod (5) includes an upper right push rod (501) that can be movably fitted by the upper through hole (106) of the right push rod, and a lower right push rod (502) that can be movably fitted by the lower through hole (107) of the right push rod. The left ends of the upper left push rod (401) and the lower left push rod (402) are respectively connected to the left clamping plate (6); The left ends of the upper right push rod (501) and the lower right push rod (502) are respectively connected to the right clamp (7).

3. The centering and clamping mechanism for dry ice bags according to claim 2, characterized in that, A right guide through hole (109) is also provided between the upper through hole (104) of the left push rod and the lower through hole (105) of the left push rod, which can movably fit the right guide rod (9). A left guide through hole (108) is also provided between the upper through hole (106) of the right push rod and the lower through hole (107) of the right push rod, which can movably fit the left guide rod (8). The left end of the left guide rod (8) is connected to the left clamping plate (6), and the right end of the right guide rod (9) is connected to the right clamping plate (7).

4. A centering and clamping mechanism for dry ice bags according to claim 2 or 3, characterized in that, The gear assembly (2) includes a gear shaft (201), and the gear shaft (201) is movably connected to the upper and lower openings of the gear shaft through hole (101) by a shaft ball bearing (202); Synchronous gears (203) are provided on the gear shaft (201) at positions corresponding to the left push rod (4) and the right push rod (5).

5. A centering and clamping mechanism for dry ice bags according to claim 4, characterized in that, The synchronizing gear (203) includes an upper synchronizing gear (204) corresponding to the upper left push rod (401) and the upper right push rod (501), and a lower synchronizing gear (205) corresponding to the lower left push rod (402) and the lower right push rod (502).

6. A centering and clamping mechanism for dry ice bags according to claim 5, characterized in that, The upper left push rod (401) and the upper right push rod (501) are respectively provided with upper push rod tooth paths (10) that can mesh with the upper synchronous gear (204), and the lower left push rod (402) and the lower right push rod (502) are respectively provided with lower push rod tooth paths (11) that can mesh with the lower synchronous gear (205).

7. The centering and clamping mechanism for dry ice bags according to claim 1, characterized in that, The motor (3) is fixed by a motor bracket (16) set on the top of the clamping seat (1), and the rotating shaft of the motor (3) is fixed to the top of the gear shaft (201) by a coupling.

8. A centering and clamping mechanism for dry ice bags according to claim 7, characterized in that, The motor (3) is a servo motor.

9. A centering and clamping mechanism for dry ice bags according to claim 1, characterized in that, The left clamp (6) and the right clamp (7) are identical in specifications, each including a push rod connecting part (13), a bending part (14) and a clamping part (15). The angle between the push rod connecting part (13) and the bending part (14) and the bending part (14) and the clamping part (15) is 90° to 145°.

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