An adsorptive packaging bag opening device

Abstract

The utility model provides a kind of adsorption type packing bag opening device, including power unit;Power unit includes first moving part, second moving part, first swing arm and second swing arm.The utility model is by being provided with including first moving part, second moving part, first swing arm and second swing arm and the like component's novel power unit, and the movement relationship between each component is reasonably configured, so that the power unit only by controlling the movement mode of two moving parts, two swing arms free end's adsorption execution component opening or overall displacement can be selectively driven.This kind of structural design fundamentally discards the complex structure that must be configured independent power source for the opening and closing movement and overall displacement of adsorption execution component in traditional opening device, to facilitate the mechanical structure of opening device, reduce overall occupied space, reduce manufacturing cost, and avoid the problem that control difficulty is greater brought by multiple power sources.

Description

Technical Field

[0001] This utility model relates to the field of material packaging machine technology, and more specifically, to an adsorption-type packaging bag opening device. Background Technology

[0002] The content in this section only provides background information related to this utility model and may not constitute prior art.

[0003] In automated material packaging equipment such as bagging machines, the bag opening device is a key functional unit. It undertakes the important task of opening the bag and transferring the bag to the next packaging station. Its performance directly affects the overall machine operating efficiency and packaging reliability.

[0004] Currently, most widely used bag-opening devices employ an adsorption structure. A typical design can be found in the technical solution disclosed in Chinese patent document CN202110015825.0, entitled "An Automatic Bag Packaging Equipment". This type of bag-opening device typically features two symmetrically arranged vacuum adsorption components (usually including vacuum suction cups). The opening of the packaging bag is achieved through the opposing or separating opening and closing movements of the two sets of vacuum adsorption components, and the overall displacement of the two sets of vacuum adsorption components completes the transfer of the packaging bag between workstations.

[0005] However, such common bag-opening devices still have certain drawbacks in practical applications: they not only require a separate power mechanism (e.g., a cylinder) for each set of vacuum adsorption components to achieve the opening and closing motion of the two sets of vacuum adsorption components, but also require an additional power mechanism (e.g., a linear module) to achieve the overall displacement of the two sets of vacuum adsorption components. This structural design not only leads to a complex mechanical structure, a large space occupation, and increased manufacturing costs for the bag-opening device, but also increases the complexity of system control and coordination. Utility Model Content

[0006] In view of this, the purpose of this utility model is to provide an adsorption-type packaging bag opening device, so as to overcome at least the technical problems of existing bag opening devices, which require a lot of power mechanisms, resulting in complex mechanical structure, large space occupation, high manufacturing cost and high control difficulty.

[0007] The objective of this utility model is achieved through the following technical solution: This utility model provides an adsorption-type packaging bag opening device, including a power unit; The power unit includes a first moving component, a second moving component, a first swing arm, and a second swing arm; The first and second moving parts are configured to perform independent reciprocating linear motions along a reference axis; The first swing arm is hinged to the first moving member to form a first revolute joint, and the second swing arm is hinged to the first moving member to form a second revolute joint; the rotation axes of the first revolute joint and the second revolute joint are both perpendicular to the reference axis. The free end of the first swing arm is provided with a first adsorption actuation component, and the free end of the second swing arm is provided with a second adsorption actuation component; The first swing arm is slidably engaged with the second moving member through a first guide structure; the second swing arm is slidably engaged with the second moving member through a second guide structure. The guiding directions of the first guide structure and the second guide structure are both inclined relative to the reference axis, so that when the first moving member and the second moving member produce relative linear motion, the first guide structure can drive the first swing arm to rotate around the rotation axis of the first rotating joint, and the second guide structure can drive the second swing arm to rotate around the rotation axis of the second rotating joint; when the first moving member and the second moving member produce synchronous linear motion, the first swing arm and the second swing arm remain stationary relative to the two moving members.

[0008] Optionally, the first guide structure and the second guide structure have the same structure; The rotation axes of the first and second rotary joints, as well as the first and second guide structures, are symmetrically arranged along the reference axis.

[0009] Optionally, the first guide structure includes: A first slide rail, the axis of which is inclined relative to the reference axis; The first guide member slides in conjunction with the first slide rail; Wherein, one of the first slide rail and the first guide member is disposed on the second moving member; the other of the first slide rail and the first guide member is disposed on the first swing arm.

[0010] Optionally, the first slide rail includes a proximal end near the first moving member and a distal end away from the first moving member; The distance from the proximal end of the first slide to the reference axis is less than the distance from the distal end of the first slide to the reference axis.

[0011] Optionally, the free end of the first swing arm is hinged to the first adsorption actuation component to form a third revolute joint; the free end of the second swing arm is hinged to the second adsorption actuation component to form a fourth revolute joint. The power unit also includes a first connecting arm and a second connecting arm; The first connecting arm is parallel to the first swing arm; one end of the first connecting arm is hinged to the first moving member to form a fifth revolute joint, and the other end of the first connecting arm is hinged to the first adsorption actuation component to form a sixth revolute joint; The second connecting arm is parallel to the second swing arm; one end of the second connecting arm is hinged to the first moving member to form a seventh revolute joint, and the other end of the second connecting arm is hinged to the second adsorption actuation component to form an eighth revolute joint; The rotation axes of the first revolute joint, the second revolute joint, the third revolute joint, the fourth revolute joint, the fifth revolute joint, the sixth revolute joint, the seventh revolute joint, and the eighth revolute joint are all parallel to each other.

[0012] Optionally, the power unit further includes a first linear drive assembly and a second linear drive assembly; Both the first linear drive assembly and the second linear drive assembly are adapted to output reciprocating linear motion along the reference axis; The first moving part is connected to the power output end of the first linear drive assembly; the second moving part is connected to the power output end of the second linear drive assembly.

[0013] Optionally, there are two power units, which are arranged opposite each other along the length direction of the adsorption actuation component; the length direction of the adsorption actuation component is perpendicular to the reference axis. The free ends of the first swing arms of the two power units are respectively connected to the two sides of the first adsorption actuation component along its own length. The free ends of the second swing arms of the two power units are respectively connected to the two sides of the second adsorption actuator along its own length.

[0014] Optionally, the absorbent packaging bag opening device further includes: A first drive component is used to simultaneously provide power to the first linear drive assembly of both power units; The second drive component is used to simultaneously power the second linear drive assembly of both power units.

[0015] Optionally, both the first linear drive assembly and the second linear drive assembly are belt drive mechanisms.

[0016] Optionally, the power unit may further include a guide rail parallel to the reference axis; Both the first moving part and the second moving part are slidably connected to the guide rail.

[0017] The technical solution of this utility model embodiment has at least the following advantages and beneficial effects: The adsorption-type packaging bag opening device provided by this utility model features a novel power unit comprising a first moving component, a second moving component, a first swing arm, and a second swing arm. By rationally configuring the motion relationships between these components, the power unit can selectively drive the adsorption actuators at the free ends of the two swing arms to open / close or to displace the entire device by controlling the motion modes of only two moving components. This structural design fundamentally eliminates the complex structure of traditional bag opening devices that require separate power sources for the opening / closing motion of the adsorption actuators and the overall displacement. This simplifies the mechanical structure of the bag opening device, reduces the overall space required, lowers manufacturing costs, and avoids the significant control difficulties associated with multiple power sources. Attached Figure Description

[0018] Figure 1 A schematic diagram of the structure of the adsorption-type packaging bag opening device provided in an embodiment of this utility model; Figure 2 for Figure 1 Side view; Figure 3 for Figure 2 Enlarged view of the local structure at point A in the middle.

[0019] Icons: 10-First adsorption actuator, 11-First mounting arm, 12-First adsorption element, 20-Second adsorption actuator, 21-Second mounting arm, 22-Second adsorption element, 30-Power unit, 31-First moving element, 32-Second moving element, 33-First swing arm, 34-Second swing arm, 35-First guide structure, 351-First slide rail, 352-First guide element, 36-Second guide structure, 37-First connecting arm, 38-Second connecting arm, 39-First linear drive assembly, 391-First transmission belt, 310-Second linear drive assembly, 3101-Second transmission belt, 320-Guide rail, 40-First drive component, 50-Second drive component, s-Reference axis, a-First revolute joint, b-Second revolute joint, c-Third revolute joint, d-Fourth revolute joint, e-Fifth revolute joint, f-Sixth revolute joint, g-Seventh revolute joint, h-Eighth revolute joint. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below in conjunction with specific embodiments. The same reference numerals in the accompanying drawings represent the same components. It should be noted that the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the described embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0021] Compared to the embodiments shown in the accompanying drawings, feasible embodiments within the scope of protection of this utility model may have fewer components, have other components not shown in the drawings, different components, components with different arrangements, or components with different connections, etc. Furthermore, two or more components in the drawings may be implemented in a single component, or a single component shown in the drawings may be implemented as multiple separate components.

[0022] Unless otherwise defined, the technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention pertains. The terms "first," "second," and similar terms used in this specification and claims do not indicate any order, quantity, or importance, but are merely used to distinguish different components.

[0023] This utility model discloses an adsorption-type packaging bag opening device, which can be applied to automated material packaging equipment such as bagging machines to open the bag opening and transfer the packaging bag. For ease of explanation, the adsorption-type packaging bag opening device provided in this utility model embodiment will be referred to as an "opening device" below.

[0024] Figure 1 The schematic diagram illustrates the structure of the bag-opening device provided in this embodiment of the present invention. Figure 2 for Figure 1 Side view, Figure 3 for Figure 2 Enlarged view of the local structure at point A in the middle.

[0025] like Figures 1 to 3 As shown, according to an embodiment of the present invention, the bag opening device may include a first adsorption actuation component 10, a second adsorption actuation component 20, and a power unit 30.

[0026] The first adsorption actuator 10 is used to cooperate with the second adsorption actuator 20. The two can move closer or further apart to perform opening and closing actions, thereby making it possible to open the bag opening and transfer the bag.

[0027] Specifically, refer to Figure 1 As shown, the first adsorption actuation assembly 10 may include a horizontally extending first mounting arm 11 and a plurality of first adsorption elements 12 disposed on the first mounting arm 11. The second adsorption actuation assembly 20 may include a horizontally extending second mounting arm 21 and a plurality of second adsorption elements 22 disposed on the second mounting arm 21. The first adsorption actuation assembly 10 and the second adsorption actuation assembly 20 are disposed opposite to each other, and the first adsorption elements 12 face the second adsorption elements 22. Both the first adsorption elements 12 and the second adsorption elements 22 may be vacuum suction cups.

[0028] With this configuration, when the first adsorption actuator 10 and the second adsorption actuator 20 approach each other, the first adsorption element 12 and the second adsorption element 22 can respectively adsorb the opposite sides of the packaging bag. Based on this, simply moving the first adsorption actuator 10 and the second adsorption actuator 20 away from each other will open the packaging bag. Correspondingly, when both the first adsorption element 12 and the second adsorption element 22 have adsorbed the packaging bag, simply moving the first adsorption actuator 10 and the second adsorption actuator 20 synchronously in one direction will transfer the packaging bag.

[0029] The power unit 30 is mainly used to realize the opening and closing action of the first adsorption actuator 10 and the second adsorption actuator 20, as well as the synchronous displacement of the first adsorption actuator 10 and the second adsorption actuator 20 along one direction.

[0030] Combination Figures 1 to 3 As shown, the power unit 30 may include a first moving member 31, a second moving member 32, a first swing arm 33, a second swing arm 34, a first guide structure 35, and a second guide structure 36.

[0031] The first moving part 31 and the second moving part 32 move along the same path. Figure 2 or Figure 3 The reference axes s shown are arranged sequentially, and the first moving member 31 and the second moving member 32 are configured to perform reciprocating linear motions independently along the reference axes s. That is, the first moving member 31 can perform reciprocating linear motions independently along the reference axes s, and the second moving member 32 can also perform reciprocating linear motions independently along the reference axes s.

[0032] Both the first swing arm 33 and the second swing arm 34 have a free end and a movable end opposite to the free end. (Refer to...) Figure 3 As shown, the movable end of the first swing arm 33 is hinged to the first moving member 31 to form a first revolute joint a, allowing the first swing arm 33 to rotate about the rotation axis of the first revolute joint a. The movable end of the second swing arm 34 is hinged to the first moving member 31 to form a second revolute joint b, allowing the second swing arm 34 to rotate about the rotation axis of the second revolute joint b. The rotation axes of both the first revolute joint a and the second revolute joint b are perpendicular to the reference axis s.

[0033] The free end of the first swing arm 33 is provided with the first adsorption actuation component 10 described above, specifically, the free end of the first swing arm 33 is connected to the first mounting arm 11. The free end of the second swing arm 34 is provided with the second adsorption actuation component 20 described above, specifically, the free end of the second swing arm 34 is connected to the second mounting arm 21.

[0034] The first swing arm 33 is slidably engaged with the second moving member 32 via the first guide structure 35. The second swing arm 34 is slidably engaged with the second moving member 32 via the second guide structure 36.

[0035] Furthermore, the guiding directions of the first guide structure 35 and the second guide structure 36 are both inclined relative to the reference axis s, so that when the first moving member 31 and the second moving member 32 generate relative linear motion, the first guide structure 35 can drive the first swing arm 33 to rotate around the rotation axis of the first rotating pair a, and the second guide structure 36 can drive the second swing arm 34 to rotate around the rotation axis of the second rotating pair b, thereby enabling the free ends of the first swing arm 33 and the second swing arm 34 to move closer or further away from each other; when the first moving member 31 and the second moving member 32 generate synchronous linear motion, the first swing arm 33 and the second swing arm 34 remain stationary relative to the two moving members.

[0036] It is worth noting that the relative linear motion between the first moving member 31 and the second moving member 32 described above includes at least the following situations: 1. The first moving member 31 is stationary, and the second moving member 32 moves towards or away from the first moving member 31 at a certain speed; 2. The second moving member 32 is stationary, and the first moving member 31 moves towards or away from the second moving member 32 at a certain speed; 3. The first moving member 31 and the second moving member 32 move in the same direction at different speeds; 4. The first moving member 31 and the second moving member 32 move in opposite directions at the same or different speeds. Correspondingly, the synchronous linear motion between the first moving member 31 and the second moving member 32 described above refers to the first moving member 31 and the second moving member 32 moving in the same direction at the same speed.

[0037] Based on the above configuration, when the bag opening device is needed to open the bag opening, the first moving part 31 and the second moving part 32 are first made to move in a relative linear motion, for example, the first moving part 31 is made to stand still and the second moving part 32 is made to move away from the first moving part 31. The first swing arm 33 can rotate around the rotation axis of the first rotating joint a under the drive of the first guide structure 35, and the second swing arm 34 can rotate around the second rotating joint b under the drive of the second guide structure 36, so that the free ends of the first swing arm 33 and the second swing arm 34 first approach each other, and then the first adsorption member 12 of the first adsorption execution component 10 and the second adsorption member 22 of the second adsorption execution component 20 respectively adsorb the two sides of the bag. Subsequently, the first moving part 31 and the second moving part 32 are made to move in opposite relative linear motions, for example, the first moving part 31 is made to stand still and the second moving part 32 is made to move closer to the first moving part 31, so that the free ends of the first swing arm 33 and the second swing arm 34 move away from each other, so as to open the bag opening.

[0038] Based on this, it is only necessary to make the first moving part 31 and the second moving part 32 move synchronously, that is, move in the same direction at the same speed along the reference axis s, so that the packaged bag after the opening is transferred to the next packaging station.

[0039] According to an embodiment of this utility model, by setting a novel power unit 30 including components such as a first moving part 31, a second moving part 32, a first swing arm 33, and a second swing arm 34, and by rationally configuring the motion relationships between the components, the power unit 30 can selectively drive the adsorption actuators at the free ends of the two swing arms to open or close, or to move as a whole, simply by controlling the motion modes of the two moving parts. This structural design fundamentally eliminates the complex structure of traditional bag-opening devices that require separate power sources for the opening and closing motion of the adsorption actuators and the overall displacement. This simplifies the mechanical structure of the bag-opening device, reduces the overall space occupied, lowers manufacturing costs, and avoids the control difficulties caused by multiple power sources.

[0040] In some possible embodiments, refer to Figure 3 As shown, the first guide structure 35 and the second guide structure 36 can have the same structure. The rotation axes of the first rotary joint a and the second rotary joint b are symmetrically arranged along the reference axis s, and the first guide structure 35 and the second guide structure 36 are symmetrically arranged along the reference axis s. Correspondingly, the first swing arm 33 and the second swing arm 34, as well as the first adsorption actuation assembly 10 and the second adsorption actuation assembly 20 can all be regarded as structures symmetrically arranged along the reference axis s.

[0041] This design allows the free ends of the two swing arms to move synchronously when the first moving part 31 and the second moving part 32 generate relative linear motion. This facilitates the synchronous opening and closing of the first adsorption actuator 10 and the second adsorption actuator 20, making the bag opening device effectively suitable for applications requiring high bag flatness. Furthermore, the symmetrical and identical design means that many parts can be interchanged, reducing the number of parts and simplifying processing, assembly, and subsequent maintenance, thereby reducing costs.

[0042] In some possible embodiments, combined Figure 3 As shown, the first guide structure 35 may specifically include a first slide rail 351 and a first guide member 352. The axis of the first slide rail 351 is inclined relative to the reference axis s. The first guide member 352 is slidably engaged with the first slide rail 351, that is, the first guide member 352 can slide within the first slide rail 351.

[0043] In this design, one of the first slide rail 351 and the first guide member 352 is located on the second moving member 32; the other of the first slide rail 351 and the first guide member 352 is located on the first swing arm 33. That is, the first slide rail 351 and the first guide member 352 can be configured in two ways: 1. The first slide rail 351 is located on the second moving member 32, and the first guide member 352 is located on the first swing arm 33; 2. The first slide rail 351 is located on the first swing arm 33, and the first guide member 352 is located on the second moving member 32. The accompanying drawings of this utility model illustrate the first slide rail 351 and the first guide member 352 configured in the first way. The first guide member 352 can be a conventional sliding component such as a slide column or a bearing.

[0044] Based on the above configuration, for the first swing arm 33, when the first moving member 31 and the second moving member 32 produce relative linear motion, the first guide member 352 will slide within the first slide rail 351, thereby forcing the first swing arm 33 to rotate about the rotation axis of the first revolute a. Correspondingly, when the first moving member 31 and the second moving member 32 produce synchronous linear motion, the first guide member 352 will remain stationary within the first slide rail 351, thereby keeping the first swing arm 33 stationary relative to the two moving members. This structural design not only allows the first swing arm 33 to selectively rotate about the rotation axis of the first revolute a or remain stationary relative to the moving members, but also has a simple structure and low cost.

[0045] Furthermore, continue to refer to Figure 3 As shown, the first slide rail 351 includes a proximal end near the first moving member 31 and a distal end away from the first moving member 31. The distance from the proximal end of the first slide rail 351 to the reference axis s is less than the distance from the distal end of the first slide rail 351 to the reference axis s. This design ensures that when the second moving member 32 makes a linear movement close to the first moving member 31, the first swing arm 33 rotates (counterclockwise in the illustrated state) to move the first adsorption actuator 10 away from the second adsorption actuator 20, thus opening the first adsorption actuator 10 and the second adsorption actuator 20, and conversely, closing them.

[0046] It is worth noting that, since the structure of the second guide structure 36 is the same as that of the first guide structure 35, the arrangement of the second guide structure 36 and the way in which the second guide structure 36 drives the second swing arm 34 to rotate around the rotation axis of the second rotating pair b can be referred to the above description of the first guide structure 35, and will not be elaborated further here.

[0047] In some possible embodiments, combined Figure 3As shown, the free end of the first swing arm 33 is hinged to the first adsorption actuation component 10 (specifically the first mounting arm 11) to form a third rotary joint c; the free end of the second swing arm 34 is hinged to the second adsorption actuation component 20 (specifically the second mounting arm 21) to form a fourth rotary joint d.

[0048] Meanwhile, the power unit 30 also includes a first connecting arm 37 and a second connecting arm 38.

[0049] The first connecting arm 37 is parallel to the first swing arm 33. One end of the first connecting arm 37 is hinged to the first moving member 31 to form a fifth rotary joint e, and the other end of the first connecting arm 37 is hinged to the first adsorption actuation assembly 10 (specifically the first mounting arm 11) to form a sixth rotary joint f.

[0050] The second connecting arm 38 is parallel to the second swing arm 34. One end of the second connecting arm 38 is hinged to the first moving member 31 to form a seventh rotating joint g, and the other end of the second connecting arm 38 is hinged to the second adsorption actuation assembly 20 (specifically the second mounting arm 21) to form an eighth rotating joint h.

[0051] Among them, the rotation axes of the first revolute joint a, the second revolute joint b, the third revolute joint c, the fourth revolute joint d, the fifth revolute joint e, the sixth revolute joint f, the seventh revolute joint g, and the eighth revolute joint h are all parallel to each other.

[0052] This design, which adds connecting arms, creates two sets of parallel four-bar linkages. This allows the first and second swing arms 33 and 34 to maintain a parallel orientation during rotation, enabling the first and second adsorption actuators 10 and 20 to open and close, achieving pure translational motion. This facilitates opening flat packaging bags of varying thicknesses. Simultaneously, it improves the structural strength of the power unit 30 and enhances the stability of the two swing arms during operation.

[0053] In some possible embodiments, in order to enable the first moving member 31 and the second moving member 32 to perform independent reciprocating linear movements along the reference axis s, combined with... Figure 1 and Figure 2 As shown, the power unit 30 may further include a first linear drive assembly 39 and a second linear drive assembly 310. Both the first linear drive assembly 39 and the second linear drive assembly 310 are adapted to output reciprocating linear motion along the reference axis s. A first moving member 31 is connected to the power output end of the first linear drive assembly 39 to drive the first moving member 31 to perform reciprocating linear motion along the reference axis s via the first linear drive assembly 39. A second moving member 32 is connected to the power output end of the second linear drive assembly 310 to drive the second moving member 32 to perform reciprocating linear motion along the reference axis s via the second linear drive assembly 310.

[0054] The first linear drive assembly 39 and the second linear drive assembly 310 can both be linear modules, belt drive mechanisms, or other mechanisms suitable for outputting reciprocating linear motion. Preferably, both the first linear drive assembly 39 and the second linear drive assembly 310 can be belt drive mechanisms. Specifically, refer to... Figure 2 As shown, the first linear drive assembly 39 may include a first drive belt 391 extending in a direction parallel to the reference axis s, and a first moving member 31 connected to one side of the first drive belt 391; the second linear drive assembly 310 may include a second drive belt 3101 extending in a direction parallel to the reference axis s, and a second moving member 32 connected to one side of the second drive belt 3101. By using a belt drive mechanism as the linear drive assembly, it is beneficial to reduce costs and noise, while increasing the moving speed of the moving member, and maintenance is simple and convenient.

[0055] In some possible embodiments, combined Figure 1 and Figure 2 As shown, the power unit 30 may also include a guide rail 320 parallel to the reference axis s. Both the first moving member 31 and the second moving member 32 are slidably connected to the guide rail 320.

[0056] By setting the guide rail 320, precise and stable guiding support can be provided for each moving part, thereby improving the stability of the moving part during movement.

[0057] In some possible embodiments, refer to Figure 1 As shown, two power units 30 can be configured, and the two power units 30 are arranged opposite each other along the length direction of the adsorption actuator, specifically the mounting arm. The length direction of the adsorption actuator is perpendicular to the reference axis s.

[0058] The free ends of the first swing arms 33 of the two power units 30 are respectively connected to both sides of the first adsorption actuation component 10 along its own length, specifically to both sides of the first mounting arm 11 along its length. The free ends of the second swing arms 34 of the two power units 30 are respectively connected to both sides of the second adsorption actuation component 20 along its own length, specifically to both sides of the second mounting arm 21 along its length.

[0059] This design, which arranges two power units 30, forms a stable dual-side drive support structure, which enhances the overall structural strength of the bag opening device and helps to avoid problems such as shaking and asynchronous movement of the adsorption actuator that may occur with single-side drive.

[0060] Furthermore, such as Figure 1As shown, the bag-opening device may further include a first driving component 40 and a second driving component 50. The first driving component 40 is used to simultaneously provide power to the first linear drive assemblies 39 of the two power units 30, so that the first linear drive assemblies 39 of the two power units 30 can synchronously output reciprocating linear motion. The second driving component 50 is used to simultaneously provide power to the second linear drive assemblies 310 of the two power units 30, so that the second linear drive assemblies 310 of the two power units 30 can synchronously output reciprocating linear motion.

[0061] When there are two power units 30, the above configuration only requires two power sources, namely the first drive component 40 and the second drive component 50, which can enable the first linear drive assembly 39 of the two power units 30 and the second linear drive assembly 310 of the two power units 30 to operate synchronously, thereby further improving the reliability of the bag opening device during use.

[0062] In cases where both the first linear drive assembly 39 and the second linear drive assembly 310 are belt drive mechanisms, the first drive component 40 and the second drive component 50 can have the same structure. Exemplarily, both the first drive component 40 and the second drive component 50 can be drive devices including a drive motor and a drive shaft. The methods of connecting the two first linear drive assemblies 39 of the power unit 30 to the first drive component 40 and connecting the two second linear drive assemblies 310 of the power unit 30 to the second drive component 50 are prior art and will not be elaborated upon here.

[0063] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. An adsorption-type packaging bag opening device, characterized in that, The power unit includes a first moving member, a second moving member, a first swing arm, and a second swing arm. The first and second moving parts are configured to perform independent reciprocating linear motions along a reference axis; The first swing arm is hinged to the first moving member to form a first revolute joint, and the second swing arm is hinged to the first moving member to form a second revolute joint; the rotation axes of the first revolute joint and the second revolute joint are both perpendicular to the reference axis. The free end of the first swing arm is provided with a first adsorption actuation component, and the free end of the second swing arm is provided with a second adsorption actuation component; The first swing arm is slidably engaged with the second moving member through a first guide structure; the second swing arm is slidably engaged with the second moving member through a second guide structure. The guiding directions of the first guide structure and the second guide structure are both inclined relative to the reference axis, so that when the first moving member and the second moving member produce relative linear motion, the first guide structure can drive the first swing arm to rotate around the rotation axis of the first rotating joint, and the second guide structure can drive the second swing arm to rotate around the rotation axis of the second rotating joint; when the first moving member and the second moving member produce synchronous linear motion, the first swing arm and the second swing arm remain stationary relative to the two moving members.

2. The adsorption-type packaging bag opening device according to claim 1, characterized in that, The first guide structure and the second guide structure have the same structure; The rotation axes of the first and second rotary joints, as well as the first and second guide structures, are symmetrically arranged along the reference axis.

3. The adsorption-type packaging bag opening device according to claim 1 or 2, characterized in that, The first guide structure includes: A first slide rail, the axis of which is inclined relative to the reference axis; The first guide member slides in conjunction with the first slide rail; Wherein, one of the first slide rail and the first guide member is disposed on the second moving member; the other of the first slide rail and the first guide member is disposed on the first swing arm.

4. The adsorption-type packaging bag opening device according to claim 3, characterized in that, The first slide rail includes a proximal end near the first moving member and a distal end away from the first moving member; The distance from the proximal end of the first slide to the reference axis is less than the distance from the distal end of the first slide to the reference axis.

5. The adsorption-type packaging bag opening device according to claim 1, characterized in that, The free end of the first swing arm is hinged to the first adsorption actuation component to form a third revolute joint; the free end of the second swing arm is hinged to the second adsorption actuation component to form a fourth revolute joint. The power unit also includes a first connecting arm and a second connecting arm; The first connecting arm is parallel to the first swing arm; one end of the first connecting arm is hinged to the first moving member to form a fifth revolute joint, and the other end of the first connecting arm is hinged to the first adsorption actuation component to form a sixth revolute joint; The second connecting arm is parallel to the second swing arm; one end of the second connecting arm is hinged to the first moving member to form a seventh revolute joint, and the other end of the second connecting arm is hinged to the second adsorption actuation component to form an eighth revolute joint; The rotation axes of the first revolute joint, the second revolute joint, the third revolute joint, the fourth revolute joint, the fifth revolute joint, the sixth revolute joint, the seventh revolute joint, and the eighth revolute joint are all parallel to each other.

6. The adsorption-type packaging bag opening device according to claim 1, characterized in that, The power unit also includes a first linear drive assembly and a second linear drive assembly; Both the first linear drive assembly and the second linear drive assembly are adapted to output reciprocating linear motion along the reference axis; The first moving part is connected to the power output end of the first linear drive assembly; the second moving part is connected to the power output end of the second linear drive assembly.

7. The adsorption-type packaging bag opening device according to claim 6, characterized in that, There are two power units, which are arranged opposite each other along the length of the adsorption execution component; the length of the adsorption execution component is perpendicular to the reference axis. The free ends of the first swing arms of the two power units are respectively connected to the two sides of the first adsorption actuation component along its own length. The free ends of the second swing arms of the two power units are respectively connected to the two sides of the second adsorption actuator along its own length.

8. The adsorption-type packaging bag opening device according to claim 7, characterized in that, Also includes: A first drive component is used to simultaneously provide power to the first linear drive assembly of both power units; The second drive component is used to simultaneously power the second linear drive assembly of both power units.

9. The adsorption-type packaging bag opening device according to claim 6, characterized in that, Both the first linear drive assembly and the second linear drive assembly are belt drive mechanisms.

10. The adsorption-type packaging bag opening device according to claim 1, characterized in that, The power unit also includes a guide rail parallel to the reference axis; Both the first moving part and the second moving part are slidably connected to the guide rail.

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