Packaging bag clamping mechanism

Abstract

The utility model belongs to the field of packaging bag clamps, and discloses a packaging bag clamping mechanism which comprises a guide bearing component extending in the guide direction. A plurality of clamp assemblies are arranged side by side in the guiding direction of the guiding bearing component. Each clamp assembly comprises a first clamp and a second clamp which are arranged in pairs and slidably connected to the guiding bearing component. The expansion and contraction driving assembly comprises a first transmission rod, a second transmission rod and a driving assembly, the first transmission rod is connected with the first clamp of each clamp assembly in the guiding direction at the same time, and the second transmission rod is connected with the second clamp of each clamp assembly in the guiding direction at the same time; the driving assembly drives the first transmission rod and the second transmission rod to move in the opposite direction in the guiding direction so that the first clamp and the second clamp can do expanding and contracting actions of the opposite movement. According to the packaging bag expanding and shrinking device, expanding and shrinking driving of the clamp assembly can be achieved, so that expanding and shrinking processing of packaging bags can be achieved, transmission is more stable and reliable, and cost is reduced.

Description

Technical Field

[0001] This utility model belongs to the field of packaging bag clamping technology, specifically relating to a packaging bag clamping mechanism. Background Technology

[0002] Packaging machines require clamping mechanisms to temporarily secure packaging bags containing materials. These mechanisms use multiple grippers to open and close, holding or releasing the bags. The expansion and contraction of the bags is achieved through a transmission rod with multiple forward and reverse threads, working in conjunction with a guide rod. Each threaded segment connects to a pair of grippers; the forward and reverse rotation of the transmission rod moves the grippers in opposite directions, thus expanding and contracting the bag. However, this expansion and contraction drive mechanism has poor transmission stability, is complex, and has a high cost. Utility Model Content

[0003] In view of this, the purpose of this utility model is to provide a packaging bag clamping mechanism to solve the problem of poor transmission stability of existing packaging bag clamping mechanisms.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A packaging bag clamping mechanism, comprising:

[0006] A guide bearing member extending along a guiding direction;

[0007] Several sets of clamping assemblies are arranged side-by-side along the guiding direction of the guide bearing member. Each clamping assembly includes a first clamp and a second clamp, which are paired and slidably connected to the guide bearing member; and

[0008] The expansion and contraction drive assembly includes a first transmission rod, a second transmission rod, and a drive assembly. The first transmission rod is connected to clamp 1 of each set of clamp assemblies along the guide direction, and the second transmission rod is connected to clamp 2 of each set of clamp assemblies along the guide direction. The drive assembly drives the first transmission rod and the second transmission rod to move towards each other in the guide direction, so that clamp 1 and clamp 2 perform expansion and contraction actions in opposite directions.

[0009] In a possible implementation, clamp one is connected to transmission rod one and slides with transmission rod two, and clamp two is connected to transmission rod two and slides with transmission rod one.

[0010] In one possible implementation, the guide bearing member includes four guide shafts extending parallel to each other along the guide direction;

[0011] The four guide axes are arranged in a rectangular array, with each guide axis located at one of the four corners of the rectangular array; or, the four guide axes are arranged in a linear array.

[0012] In a possible implementation, the first clamp is provided with a through hole for fixed connection with the first transmission rod and a through hole for sliding engagement with the second transmission rod, and the second clamp is provided with a through hole for fixed connection with the second transmission rod and a through hole for sliding engagement with the first transmission rod.

[0013] In a possible implementation, the drive assembly includes drive assembly one and drive assembly two, drive assembly one driving transmission rod one to move axially, and drive assembly two driving transmission rod two to move axially opposite to transmission rod one.

[0014] In a possible implementation, both clamp one and clamp two include clamp arm one and clamp arm two. Clamp arm one has a first sliding surface, and clamp arm two has a second sliding surface that abuts and cooperates with the first sliding surface to slide along the clamping direction. A sliding limiting mechanism is provided between the first sliding surface and the second sliding surface to allow clamp arm one and clamp arm two to slide and open and close along the clamping direction.

[0015] In a possible implementation, the sliding limiting mechanism includes a support portion and a limiting slide hole. The support portion is disposed on one of the first sliding surface and the second sliding surface, and the limiting slide hole is disposed on the other of the first sliding surface and the second sliding surface. The limiting slide hole extends along a first direction parallel to the clamping direction, and the support portion is slidably fitted within the limiting slide hole.

[0016] In a possible implementation, the limiting sliding holes and support portions are provided in multiple sets at intervals along the first direction on clamp one and clamp two.

[0017] In a possible implementation, an elastic element is provided between the first clamping arm and the second clamping arm. The direction of action of the elastic element is parallel to the clamping direction so that one clamping part is reset and switched between the closed and open positions relative to the other clamping part.

[0018] In possible implementations, the support is a pulley or a slider, and the limiting sliding hole is a blind hole.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] The packaging bag clamping mechanism of this utility model can support and guide the clamping assembly through the guide bearing component, making the movement of the clamping assembly on the guide bearing component smoother and more stable. Furthermore, through the transmission rod one and transmission rod two of the expansion and contraction drive assembly, under the drive of the drive assembly, the clamping first and clamping second of each set of clamping assemblies can be driven to move in opposite directions, thereby realizing the expansion and contraction drive of the clamping assembly. This enables the expansion and contraction of the packaging bag, making the transmission more stable and reliable, and also reducing costs.

[0021] Furthermore, the clamps 1 and 2 of the clamp assembly are connected by a sliding limiting mechanism, which allows clamp arm 1 and clamp arm to open and close. The sliding arrangement of clamp arm 1 and clamp arm 2 can effectively reduce the lateral dimension of the clamping mechanism and facilitate the setting of more clamping stations. Attached Figure Description

[0022] Figure 1 A perspective view of a packaging bag clamping mechanism;

[0023] Figure 2 A first-person perspective perspective view of a packaging bag clamping mechanism after the housing is concealed.

[0024] Figure 3 A second-view perspective perspective of a packaging bag clamping mechanism after the housing is concealed.

[0025] Figure 4 This is a schematic diagram of a partial connection structure between a clamping assembly and transmission rod one and transmission rod two at one end of a packaging bag clamping mechanism.

[0026] Figure 5 This is a schematic diagram of a partial connection structure between a clamping assembly and transmission rod one and transmission rod two at the other end of a packaging bag clamping mechanism.

[0027] Figure 6 A three-dimensional schematic diagram of a clamping assembly for a packaging bag clamping mechanism;

[0028] Figure 7 An exploded view of a clamping device for a packaging bag clamping mechanism from a first-person perspective;

[0029] Figure 8 An exploded view of a clamping device for a packaging bag clamping mechanism from a second perspective;

[0030] In the diagram: 1-Outer shell; 11-Opening; 2-Clamping assembly; 21-Clamping one; 22-Clamping two; 23-Connecting part; 231-Through hole two; 232-Through hole two; 233-Through hole one; 234-Through hole one; 24-Clamping arm one; 25-Clamping arm two; 26-Clamping part; 27-Limiting sliding hole; 28-Spring; 29-Supporting part; 3-Drive assembly two; 4-Drive assembly one; 5-Transmission rod two; 6-Transmission rod one; 7-Guide bearing component; 71-Guide shaft; 8-Telescopic cylinder; 9-Linkage rod. Detailed Implementation

[0031] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to specific embodiments.

[0032] Please refer to Figure 1-8As shown, an embodiment of this application provides a packaging bag clamping mechanism, including: a guide bearing member 7 extending along a guide direction; a plurality of clamp assemblies 2 arranged side by side along the guide direction of the guide bearing member 7, each clamp assembly 2 including a clamp 1 21 and a clamp 22 that are paired and slidably connected to the guide bearing member 7; and an expansion and contraction drive assembly, the expansion and contraction drive assembly including a transmission rod 1 6, a transmission rod 2 5 and a drive assembly, the transmission rod 1 6 being connected to the clamp 1 21 of each clamp assembly 2 along the guide direction, the transmission rod 2 5 being connected to the clamp 22 of each clamp assembly 2 along the guide direction, and the drive assembly driving the transmission rod 1 6 and the transmission rod 2 5 to move toward each other in the guide direction, so that the clamp 1 21 and the clamp 2 22 perform expansion and contraction actions in opposite directions.

[0033] The guide support member 7 supports and guides the clamp assembly 2. One or more clamp assemblies can be installed on the guide support member 7. Multiple clamp assemblies facilitate batch processing of packaging bags at multiple workstations. The clamp assembly 2 mainly includes clamp one 21 and clamp two 22. Clamp one 21 and clamp two 22 can slide on the guide support member 7 to adjust their spacing. When clamping the packaging bag, the spacing adjustment allows for expansion and contraction, causing the bag opening to expand and contract from an open state to a flat closed state. The adjustment is driven by an expansion and contraction drive assembly. Driven by the drive assembly, transmission rod one 6 and transmission rod two 5 of the expansion and contraction drive assembly can move in opposite directions, thus driving clamp one 21 and clamp two 22 to perform opposite expansion and contraction actions, adjusting the direction of the spacing between clamp one 21 and clamp two 22 to achieve expansion and contraction. Because the guide support component provides guidance and support for the sliding of the clamp assembly 2, the clamp assembly 2 moves more stably and smoothly when moved by the transmission rod 6 and the transmission rod 5. Furthermore, the transmission rods 6 and 5 respectively drive the clamps 21 and 22 of each clamp assembly 2, achieving the extension and retraction of the clamp assembly 2 through opposing transmissions. This is simpler and more stable than existing transmission structures. In specific implementation, two transmission rods 6 can be used.

[0034] Through the above technical solution, the guide bearing member 7 can support and guide the clamp assembly 2, making the movement of the clamp assembly 2 on the guide bearing member 7 smoother and more stable. Furthermore, under the drive of the drive assembly, the transmission rod 6 and transmission rod 5 of the expansion and contraction drive assembly can drive the clamps 21 and 22 of each clamp assembly 2 to move in opposite directions, thereby realizing the expansion and contraction drive of the clamp assembly 2. This enables the expansion and contraction of the packaging bag, and the transmission is more stable and reliable.

[0035] In one embodiment, combined with Figures 2-6As shown, clamp 21 is connected to transmission rod 6 and slides with transmission rod 5, and clamp 22 is connected to transmission rod 5 and slides with transmission rod 6.

[0036] In this way, by using clamp 1 21 and clamp 22 to engage with the sliding and non-sliding connection structures of transmission rod 1 6 and transmission rod 2 5 respectively, the overall structure can be made more compact and occupy less space.

[0037] In the specific implementation process, clamp 1 21 and clamp 22 can be configured with connecting parts 23 for connecting or cooperating with the guide bearing member 7. By connecting with the member through the connecting parts 23, the installation of clamp assembly 2 can be facilitated.

[0038] For the guide bearing member 7, in order to guide and support the clamp assembly 2 more stably and reliably, the guide member preferably adopts multiple guide shafts 71. The connection and cooperation between the guide shafts 71 and the clamp one 21 and the clamp two 22 can improve the stability of the clamp sliding.

[0039] The arrangement structure of the guide shaft 71 of the guide component can be arranged in a variety of ways.

[0040] In the first embodiment of the guide member, the four guide shafts 71 are arranged in a rectangular array, with each guide shaft 71 positioned at one of the four corners of the array. In this embodiment, the rectangular array arrangement of the four guide shafts 71, with each shaft 71 located at a corner, creates a relatively stable sliding guide and support structure, preventing jamming during the movement of the clamp assembly 2. Furthermore, the first transmission rod 6 and the second transmission rod 5 are preferably positioned inside the four guide shafts 71, resulting in a more rational arrangement and further improving compactness.

[0041] In the second embodiment of the guide member, the four guide shafts 71 are arranged in a linear array. In this embodiment, the four guide shafts 71 are arranged in a linear array, i.e., in a "I" shape. This structure facilitates the stable and smooth sliding of the clamp assembly 2. Furthermore, the first transmission rod 6 and the second transmission rod 5 are preferably positioned in the middle of the four guide shafts 71, which makes the arrangement more rational and compact.

[0042] In order for transmission rod 6 and transmission rod 5 to respectively drive clamp 21 and clamp 22, combined with Figure 3 and Figure 4As shown, clamp 21 has a through hole 233 for fixed connection with transmission rod 6 and a through hole 234 for sliding engagement with transmission rod 5. Clamp 22 has a through hole 231 for fixed connection with transmission rod 5 and a through hole 232 for sliding engagement with transmission rod 6. The dimensions of through holes 234 and 232 are larger than the diameters of transmission rod 5 and transmission rod 6 to facilitate sliding and other movements of transmission rod 5. In this way, as transmission rod 6 and transmission rod 5 extend along the guide direction, they can be fixedly connected and slidably engaged with clamp 21 and clamp 22 respectively through through holes 233, through holes 231, through holes 234 and through holes 232, thus meeting the structural requirements of separate transmission within a compact arrangement space.

[0043] Furthermore, in combination Figures 1-3 As shown, in order to facilitate the driving of transmission rod 6 and transmission rod 5, the driving assembly includes driving assembly 4 and driving assembly 3. Driving assembly 4 drives transmission rod 6 to move axially, and driving assembly 3 drives transmission rod 5 to move axially toward transmission rod 6.

[0044] In this way, by driving drive assembly 4 and drive assembly 2 to drive transmission rod 6 and transmission rod 5 respectively, synchronous opposite movements can be achieved, thereby controlling the extension and retraction of clamp 21 and clamp 22. In specific implementation, drive assembly 4 and drive assembly 2 can be two sets of synchronously driven lead screw and nut pairs that drive transmission rod 6 and transmission rod 5 respectively through linear drive; drive assembly 4 and drive assembly 2 can also be guided by a cam guide groove structure to perform linear movements, without limitation.

[0045] Please refer to Figures 5-8 As shown in the embodiments of this application, both clamp 1 21 and clamp 22 include clamp arm 1 24 and clamp arm 25. Clamp arm 1 24 has a first sliding surface, and clamp arm 25 has a second sliding surface that abuts against the first sliding surface to slide along the clamping direction. A sliding limiting mechanism is provided between the first sliding surface and the second sliding surface to allow clamp arm 1 24 and clamp arm 25 to slide and open and close along the clamping direction.

[0046] Clamping arms 24 and 25 are positioned close to each other and can slide relative to each other. The first sliding surface of clamping arm 24 and the second sliding surface of clamping arm 25 are slidably connected by a sliding limiting mechanism. This mechanism allows clamping arms 24 and 25 to slide within a defined sliding stroke range and to open and close by sliding in the clamping direction or parallel to it. Thus, the relative sliding of clamping arms 24 and 25 allows the clamping parts 26 to engage. This close-sliding method reduces the lateral dimensions and space occupied, allowing the clamping mechanism to accommodate more clamping assemblies 2, effectively increasing the number of clamping stations and improving work efficiency.

[0047] In a preferred embodiment of the sliding limiting mechanism, the sliding limiting mechanism includes a support portion 29 and a limiting slide hole 27. The support portion is disposed on one of a first sliding surface and a second sliding surface, and the limiting slide hole 27 is disposed on the other of the first sliding surface and the second sliding surface. The limiting slide hole 27 extends along a first direction parallel to the clamping direction, and the support portion 29 is slidably fitted within the limiting slide hole 27.

[0048] The support portion 29 is used to slide with the limiting sliding hole 27 so that the clamping arm 24 and the clamping arm 25 slide relative to each other in the first direction within the sliding range defined by the limiting sliding hole 27. The relative sliding causes the clamping arm 24 and the clamping arm 25 to perform a clamping action. Furthermore, the support portion 29 slides within the sliding limiting hole, which not only enables sliding but also provides mutual support for the clamping fixture 21 and the clamping fixture 22, making the sliding of the clamping assembly 2 structure more stable and reliable.

[0049] To further improve the stability and support function of the sliding, multiple sets of limiting sliding holes 27 and support parts 29 are provided on clamp 1 21 and clamp 22 at intervals along the first direction. The multiple sets of limiting sliding holes 27 and support parts 29 can better ensure the stable sliding of clamp arm 1 24 and clamp arm 25.

[0050] Preferably, the support portion 29 is a pulley or a slider, and the limiting slide hole 27 is a blind hole. The blind hole structure of the limiting slide hole 27 allows the side away from the support portion 29 to be a closed structure. The closed structure makes the downward sliding limiting mechanism invisible from the outside, achieving a hiding effect, and also preventing dust from accumulating inside the limiting slide hole 27.

[0051] In order to achieve the reset of clamping arm 24 and clamping arm 25 after clamping, an elastic element is provided between clamping arm 24 and clamping arm 25. The direction of action of the elastic element is parallel to the clamping direction so that one clamping part 26 resets and switches between the closed position and the open position relative to the other clamping part 26.

[0052] Clamping arms 24 and 25 slide and clamp along the clamping direction. By setting an elastic element parallel to the clamping direction between them, the clamping arm can be reset by the elastic force of the elastic element after the clamping action, thus avoiding the clamping drive mechanism from resetting the clamping arm and reducing the structural configuration. The elastic element is preferably a spring 28.

[0053] Specifically, the clamping drive assembly for clamp 1 21 and clamp 22 can be driven by a cam transmission structure (not shown in the figure). For example, the clamping drive assembly may include a drive shaft extending along the guide direction, cam members mounted on the drive shaft and corresponding to each clamp, and a drive motor that drives the drive shaft to rotate. The drive motor drives the drive shaft to rotate and drives the cam members on it to rotate. The cam members are located above the movable clamping arm 25 and press against the clamping arm 25, so that the clamping arm 25 can perform a relative clamping action relative to the clamping arm 1 24 to achieve clamping. Since the spring 28 is compressed during clamping, when the cam members continue to rotate and gradually release the pressing force, the spring 28 will drive the clamping arm 25 to return to its original position, thereby completing a clamping opening and closing action. The clamping drive assembly can also be driven by a telescopic cylinder 8 driving a linkage rod 9 connected to each clamp assembly 2 to perform clamping.

[0054] In the specific implementation process, combined with Figure 1 As shown, it also includes a housing 1, which has an opening 11 for the ends of the clamping arms 24 and 25 of each clamping assembly 2 to extend out, having a clamping portion 26.

[0055] The above are merely preferred embodiments of this utility model. It should be noted that the above preferred embodiments should not be considered as limitations on this utility model, and the scope of protection of this utility model should be determined by the scope defined in the claims. For those skilled in the art, several improvements and modifications can be made without departing from the spirit and scope of this utility model, and these improvements and modifications should also be considered within the scope of protection of this utility model.

Claims

1. A packaging bag clamping mechanism, characterized in that, include: A guide bearing member (7) extending along a guiding direction; Several sets of clamp assemblies (2) are arranged side by side along the guiding direction of the guide bearing member (7). Each clamp assembly (2) includes a clamp one (21) and a clamp two (22) that are paired and slidably connected to the guide bearing member (7); and The expansion and contraction drive assembly includes a transmission rod one (6), a transmission rod two (5), and a drive assembly. The transmission rod one (6) is connected to clamp one (21) of each clamp assembly (2) along the guide direction. The transmission rod two (5) is connected to clamp two (22) of each clamp assembly (2) along the guide direction. The drive assembly drives the transmission rod one (6) and the transmission rod two (5) to move towards each other in the guide direction, so that clamp one (21) and clamp two (22) perform expansion and contraction actions towards each other.

2. The packaging bag clamping mechanism as described in claim 1, characterized in that, The first clamp (21) is connected to the first transmission rod (6) and slides with the second transmission rod (5). The second clamp (22) is connected to the second transmission rod (5) and slides with the first transmission rod (6).

3. The packaging bag clamping mechanism as described in claim 2, characterized in that, The guide bearing member (7) includes four guide shafts (71) extending parallel to each other along the guide direction; The four guide shafts (71) are arranged in a rectangular array, and the guide shafts (71) are respectively located at the four corners of the rectangular array; or, the four guide shafts (71) are arranged in a linear array.

4. The packaging bag clamping mechanism as described in claim 2, characterized in that, The first clamp (21) is provided with a through hole (233) for fixed connection with the first transmission rod (6) and a through hole (234) for sliding cooperation with the second transmission rod (5). The second clamp (22) is provided with a through hole (231) for fixed connection with the second transmission rod (5) and a through hole (232) for sliding cooperation with the first transmission rod (6).

5. The packaging bag clamping mechanism as described in claim 1, characterized in that, The drive assembly includes drive assembly one (4) and drive assembly two (3). Drive assembly one (4) drives transmission rod one (6) to move axially, and drive assembly two (3) drives transmission rod two (5) to move axially opposite to transmission rod one (6).

6. A packaging bag clamping mechanism as described in any one of claims 1-5, characterized in that, Both clamp one (21) and clamp two (22) include clamp arm one (24) and clamp arm two (25). Clamp arm one (24) has a first sliding surface, and clamp arm two (25) has a second sliding surface that abuts against the first sliding surface to slide along the clamping direction. A sliding limiting mechanism is provided between the first sliding surface and the second sliding surface to allow clamp arm one (24) and clamp arm two (25) to slide and open and close along the clamping direction.

7. A packaging bag clamping mechanism as described in claim 6, characterized in that, The sliding limiting mechanism includes a support part (29) and a limiting sliding hole (27). The support part is disposed on one of the first sliding surface and the second sliding surface, and the limiting sliding hole (27) is disposed on the other of the first sliding surface and the second sliding surface. The limiting sliding hole (27) extends along a first direction parallel to the clamping direction, and the support part (29) is slidably fitted in the limiting sliding hole (27).

8. The packaging bag clamping mechanism as described in claim 7, characterized in that, The limiting sliding hole (27) and the support part (29) are provided in multiple sets along the first direction on the first clamp (21) and the second clamp (22).

9. A packaging bag clamping mechanism as described in claim 6, characterized in that, An elastic element is provided between the first clamping arm (24) and the second clamping arm (25). The direction of action of the elastic element is parallel to the clamping direction so that one clamping part (26) is reset and switched between the closed position and the open position relative to the other clamping part (26).

10. A packaging bag clamping mechanism as described in claim 7, characterized in that, The support part (29) is a pulley or a slider, and the limiting sliding hole (27) is a blind hole.

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