Clamp mechanism and food bag sealing machine

Abstract

This invention relates to the field of sealing machine technology, and discloses a clamping mechanism and a food bag sealing machine. A clamping mechanism includes a third housing with a first rotating cavity, a first rotating member, a second rotating member, and a third sliding member; it also includes a first elastic member, a second elastic member, a third elastic member, and a pressing member; a mating member is provided on the side wall of the third sliding member, and the pressing member is used to drive the third sliding member to move away from the second rotating member; the first rotating member and the second rotating member have a first engaging portion and a second engaging portion at their ends, which restrict the first rotating member from rotating forward relative to the second rotating member; the second rotating member and the third sliding member each have a third engaging portion and a fourth engaging portion at their ends, which restrict the second rotating member from rotating in the opposite direction. With the above configuration, it is preferable to facilitate the operator pulling the food bag to drive the roll to rotate forward, and preferably to achieve automatic reverse rotation of the roll.

Description

Technical Field

[0001] This invention relates to the field of sealing machine technology, and more specifically, to a clamping mechanism and a food bag sealing machine. Background Technology

[0002] A food bag sealing machine is a machine used to seal food bags so that the food inside can be sealed and preserved. It usually includes large food bag sealing machines and small food bag sealing machines. Because small food bag sealing machines are easy to move and carry, they are mostly used in homes, workshops and other places.

[0003] The sealing process of food bags involves multiple steps, including cutting the food bags, sealing the ends, and vacuuming. Since current small food bag sealing machines can usually only perform the sealing and vacuuming processes, the food bags need to be cut separately before sealing and vacuuming. This results in inconveniences such as low sealing efficiency and increased costs. Therefore, it is necessary to modify them so that they can simultaneously perform multiple processes such as cutting, sealing, and vacuuming of food bags.

[0004] When modifying an existing small food bag sealing machine, since the food bags are usually wound on a roller, it is usually necessary to add a clamping structure for fixing the roller, a cutting device for cutting the food bags, and a pressing mechanism for fixing the ends of the food bags.

[0005] When using a small food bag sealing machine, after stretching and cutting the food bag, the end of the connecting roller needs to be rotated back to the roller. Since the current clamping mechanism usually requires external force to drive the roller to rotate, the rotation of the food bag is relatively inconvenient. Summary of the Invention

[0006] The present invention provides a clamping mechanism that can overcome some or more defects of the prior art.

[0007] According to a clamping mechanism of the present invention, it includes: a third housing for cooperating with the lower cover of a food bag sealing machine and having a first rotating cavity; and a first rotating member, a second rotating member and a third sliding member coaxially arranged in the first rotating cavity in sequence, wherein the first rotating member is used for fixedly cooperating with both ends of the roller of the food bag sealing machine.

[0008] It also includes a first elastic element, a second elastic element, a third elastic element, and a pressing element;

[0009] The first elastic member is used to drive the third sliding member to move toward the second rotating member so that the end face of the third sliding member is pressed against the end face of the second rotating member; the second elastic member is used to drive the second rotating member to move toward the first rotating member so that the end face of the second rotating member is pressed against the end face of the first rotating member; the third elastic member is used to drive the second rotating member to rotate in the opposite direction; the side wall of the third sliding member is provided with a mating member for slidingly engaging with the pressing member, and the pressing member is used to drive the third sliding member to move away from the second rotating member through the mating member under the pressing action;

[0010] The first rotating member and the second rotating member have a first engaging portion and a second engaging portion respectively at their opposite ends for engaging with each other. The first engaging portion and the second engaging portion are used to restrict the first rotating member from rotating in the forward direction relative to the second rotating member when the first rotating member and the second rotating member are pressed together. The second rotating member and the third sliding member have a third engaging portion and a fourth engaging portion respectively at their opposite ends for engaging with each other. The third engaging portion and the fourth engaging portion are used to restrict the second rotating member from rotating in the reverse direction when the second rotating member and the third sliding member are pressed together.

[0011] The above settings make it easier for staff to pull the food bag to rotate the roll in the forward direction and to automatically rotate the roll in the reverse direction.

[0012] Ideally, when the top cover is open, the food bag will not rotate under the action of the third elastic element after the external force applied to it is removed when the worker stretches the food bag, thus facilitating the worker to stretch the food bag and close the top cover multiple times. Ideally, when the top cover is closed, the roller can automatically rotate in the opposite direction to drive the food bag to rotate; and when the end of the food bag is fixed, the roller stops rotating.

[0013] Specifically, under the action of the second elastic member, the end face of the second rotating member is pressed against the end face of the first rotating member. When the end face of the first rotating member and the end face of the second rotating member are pressed against each other, the first rotating member cannot rotate in the forward direction relative to the second rotating member under the action of the first engaging part and the second engaging part. That is, the second rotating member can only rotate in the forward direction relative to the first rotating member, and the second rotating member and the first rotating member can rotate in the same direction.

[0014] Specifically, when the top cover is opened, the end face of the third sliding member is pressed against the end face of the second rotating member under the action of the first elastic member. When the end face of the third sliding member and the end face of the second rotating member are pressed against each other, the second rotating member cannot rotate in the reverse direction under the action of the third engaging part and the fourth engaging part, that is, the second rotating member can only rotate in the forward direction.

[0015] Specifically, after the top cover is closed, the top cover presses down on the pressing component, causing it to move downwards. This causes the end face of the third sliding component to separate from the end face of the second rotating component, allowing the second rotating component to rotate in the opposite direction.

[0016] Preferably, the first engaging portion includes a plurality of first engaging teeth spaced apart along the circumference of the first rotating member at the end face of the first rotating member, and the second engaging portion includes a plurality of second engaging teeth spaced apart along the circumference of the second rotating member at the end face of the second rotating member. The first engaging teeth are used to engage with the second engaging teeth. The first engaging teeth include a continuously arranged third helical inclined surface and a first locking surface, and the second engaging teeth include a continuously arranged fourth helical inclined surface and a second locking surface. The third helical inclined surface and the fourth helical inclined surface are slidably engaged, and the first locking surface and the second locking surface cooperate with each other to restrict the first rotating member from rotating in the forward direction relative to the second rotating member.

[0017] Through the above, the first locking surface and the second locking surface cooperate to better restrict the forward rotation of the first rotating member relative to the second rotating member, thus better realizing the synchronous rotation of the first rotating member and the second rotating member; the sliding cooperation of the third helical inclined surface and the fourth helical inclined surface better realizes the reverse rotation of the first rotating member relative to the second rotating member.

[0018] Preferably, the third engaging portion includes a plurality of third teeth spaced apart circumferentially on the end face of the second rotating member, and the fourth engaging portion includes a plurality of fourth teeth spaced apart circumferentially on the end face of the third sliding member, the third teeth being used to engage with the fourth teeth; the third teeth include a continuously arranged fifth helical inclined surface and a third locking surface, and the fourth teeth include a continuously arranged sixth helical inclined surface and a fourth locking surface; the fifth helical inclined surface and the sixth helical inclined surface are slidably engaged, and the third locking surface and the fourth locking surface cooperate with each other to restrict the second rotating member from rotating in the opposite direction relative to the third sliding member.

[0019] As described above, when the end face of the third sliding member abuts against the end face of the second rotating member, the third locking surface and the fourth locking surface cooperate to better restrict the reverse rotation of the second rotating member; the sliding cooperation between the fifth helical inclined surface and the sixth helical inclined surface better realizes the forward rotation of the second rotating member.

[0020] Preferably, the third sliding member is provided with a first through hole that passes through the third sliding member along the axis of the scroll shaft, and the inner wall of the middle part of the first through hole expands radially toward the axis of the first through hole to form a second flange. The side wall of the first rotating cavity is provided with a first guide post that extends toward the direction of the scroll shaft, and the first guide post slides in conjunction with the inner wall of the second flange.

[0021] The second rotating component is provided with a second through hole that passes through the second rotating component along the axis of the scroll shaft. A second connecting plate is provided on the inner wall of the middle part of the second through hole. A second guide post is provided on the end face of the second connecting plate facing the second flange, which is parallel to the axis of the scroll shaft. A first guide groove is provided on the end face of the second guide post facing the second flange for sliding cooperation with the first guide post. The first guide post and the first guide groove are rotatably engaged.

[0022] The second connecting plate has a third guide post arranged axially parallel to the spool at the end face facing away from the second flange. The first rotating part has a first mounting groove at the end facing the second rotating part. The bottom surface of the first mounting groove has a second guide groove for sliding cooperation with the third guide post. The third guide post and the second guide groove are rotatably cooperated.

[0023] Through the above, the movement direction of the third slider, the movement and rotation direction of the second rotating member, and the movement direction of the third slider are better guided, thereby better improving the stability of the axial movement of the third slider, the stability of the circumferential rotation of the first rotating member, and the stability of the axial movement and circumferential rotation of the second rotating member.

[0024] Preferably, the outer end face of the third housing is provided with a sixth opening groove communicating with the first rotating cavity, and a sealing member for sealing the sixth opening groove; one end of the first guide post is fixedly disposed at the end face of the sealing member. Therefore, the installation of the first rotating member, the second rotating member and the third sliding member is more convenient.

[0025] Preferably, the first elastic element includes a fourth compression spring sleeved on the first guide post, and the sealing element and the second flange are used to limit the two ends of the fourth compression spring.

[0026] The second elastic element includes a first tension spring sleeved on the third guide post, and a first rotating element for rotating along the axial direction of the roll shaft is provided at the bottom wall of the first mounting groove. The two ends of the first tension spring are respectively fixed at the first rotating element and the second connecting plate.

[0027] The third elastic element includes a spring with its two ends fixed to the outer wall of the second rotating element and the inner wall of the first rotating cavity, respectively.

[0028] As described above, the installation of the fourth compression spring and the mainspring is thus more convenient, and it preferably achieves the limiting of both ends of the fourth compression spring and the automatic reverse rotation of the second rotating member, while also facilitating the installation of the mainspring. Furthermore, it preferably guides the movement direction of the third sliding member, thereby restricting its circumferential rotation.

[0029] Preferably, the upper end face of the third housing is provided with a fifth opening groove that connects to the first rotating cavity, and the pressing member is disposed at the fifth opening groove; the upper end face of the mating member forms a fifth guide slope, and the lower end face of the pressing member is used to press the fifth guide slope when moving downward to realize the movement of the third sliding member away from the second rotating member. Therefore, the axial movement of the third sliding member is preferably realized when the mating member moves downward.

[0030] Preferably, a sixth limiting groove is provided on the side wall of the first rotating cavity for sliding engagement with the mating part. This better guides the movement direction of the third sliding member, thereby limiting its circumferential rotation.

[0031] Preferably, a third stepped surface is formed between the fifth opening groove and the sixth limiting groove, and a first flange is provided on the side wall of the mating part. The first flange is used to mate with the third stepped surface to prevent the mating part from disengaging from the fifth opening groove. Therefore, the mating part is preferably prevented from disengaging from the fifth opening groove.

[0032] The present invention provides a food bag sealing machine, which includes a clamping mechanism. Attached Figure Description

[0033] Figure 1 This is a schematic diagram of the structure of a food bag sealing machine in Example 1.

[0034] Figure 2 This is an exploded schematic diagram of a food bag sealing machine in Example 1.

[0035] Figure 3 This is a schematic diagram of the structure of the upper cover in Example 1.

[0036] Figure 4 This is a schematic diagram of the installation unit in Example 1.

[0037] Figure 5 for Figure 4 An exploded diagram of the structure is shown in the image.

[0038] Figure 6 This is an exploded view of the lifting unit, locking mechanism and interlocking unit in Example 1.

[0039] Figure 7 This is an exploded view of the lifting unit, locking mechanism and interlocking unit in Example 1.

[0040] Figure 8 This is an exploded view of the lifting unit, locking mechanism and interlocking unit in Example 1.

[0041] Figure 9 This is an exploded view of the lifting unit, locking mechanism and interlocking unit in Example 1.

[0042] Figure 10 This is a schematic diagram of the interlocking component in Example 1.

[0043] Figure 11 This is a schematic diagram of the storage device in Example 1.

[0044] Figure 12 This is a schematic diagram of the clamping mechanism in Example 1.

[0045] Figure 13 This is a cross-sectional schematic diagram of the clamping mechanism in Example 1.

[0046] Figure 14 This is a schematic diagram of the clamping mechanism in Example 1.

[0047] Figure 15 for Figure 14 An enlarged schematic diagram of structure A in the middle.

[0048] Figure 16 This is a schematic diagram of the clamping mechanism in Example 1.

[0049] Figure 17 for Figure 16 An enlarged schematic diagram of the B-structure.

[0050] Figure 18 This is an exploded schematic diagram of the clamping mechanism in Example 1.

[0051] Figure 19 for Figure 18 An enlarged schematic diagram of the C-structure.

[0052] Figure 20 This is a schematic diagram of the lower cover and sealing structure in Example 1.

[0053] Figure 21 This is a schematic diagram of the lower vacuum component in Example 1.

[0054] Figure 22 for Figure 21 An enlarged schematic diagram of the D-structure. Detailed Implementation

[0055] To further understand the content of this invention, the invention will be described in detail with reference to the embodiments. It should be understood that the embodiments are merely illustrative and not limiting of the invention.

[0056] Example 1

[0057] In this embodiment, "up" and "down", "left" and "right", "front" and "back" all refer to the orientation of the sealing machine body 100 when the upper cover 110 is closed; wherein, the upper cover 110 closed state means that the upper cover 110 and the lower cover 120 are in a closed state; wherein, the two directions of the sealing machine body 100 in the height direction are "up" and "down", the two directions of the sealing machine body 100 in the width direction are "front" and "back", and the two directions of the sealing machine body 100 in the length direction are "left" and "right".

[0058] In this embodiment, the forward direction is the direction in which the food bag at the roller 210 is pulled towards the sealing device, causing the roller 210 to rotate; the reverse direction is the opposite of the forward direction.

[0059] like Figure 1-22As shown, this embodiment provides a food bag sealing machine, which includes a sealing machine body 100. The sealing machine body 100 includes an upper cover 110 and a lower cover 120 that are hinged to each other, and a storage device, a vacuuming device, a cutting device, a locking mechanism, and a sealing device that are sequentially arranged from front to back on the inner end faces of the upper cover 110 and the lower cover 120 along the width direction of the sealing machine body 100.

[0060] The storage device includes a spool 210, clamping mechanisms located at both ends of the spool 210, and a pressing mechanism. The spool 210 is used to store food bags. The clamping mechanisms are used to adjust the forward and reverse rotation of the spool 210 to control the stretching and rotation of the food bags. The pressing mechanism is used to cooperate with the food bags to limit the stretching and rotation length of the food bags. The pressing mechanism is located between the spool 210 and the cutting device. The vacuuming device is used to vacuum the food bags, and the sealing device is used to seal the food bags. The cutting device is used to cut the food bags. The cutting device also includes a locking mechanism unit for locking the upper cover 110 and the lower cover 120 when cutting the food bags.

[0061] Among them, the inner end faces of the upper cover 110 and the lower cover 120 are the opposite end faces of the upper cover 110 and the lower cover 120.

[0062] Through the above, it is possible to achieve the following: equal-length cutting of food bags at the roller 210; end sealing of food bags detached from the roller 210 after cutting; automatic equal-length rotation of food bags at the roller 210 after cutting; vacuuming and end sealing of food bags after they are filled with food; and locking of the upper cover 110 and the lower cover 120.

[0063] The sealing machine body 100 cuts food bags to equal lengths, which improves the neatness of packaged food and facilitates operation. The sealing machine body 100 seals and vacuums the food bags, enhancing the freshness and shelf life of packaged food. The locking mechanism secures the upper cover 110 and lower cover 120, facilitating movement of the sealing machine body 100 and reducing risks to workers during bag cutting, vacuuming, and sealing. Since the food bag stops moving after being stretched to a certain length, the pressing mechanism and sealing device position both ends of the bag, tightening it and facilitating cutting by the cutting device. However, due to the distance between the roller 210 and the cutting device, the remaining bag between them after cutting can affect subsequent vacuuming and sealing processes. In this embodiment, the sealing machine body 100 can automatically rotate the food bag at the cut roll 210 back to the roll 210, thus facilitating the normal use of subsequent food bag vacuuming and sealing processes. Furthermore, the sealing machine body 100 in this embodiment can ensure that the rotation length of the food bag is equal, thus reducing the probability of situations such as the worker having difficulty finding the end of the food bag at the roll 210 due to excessive rotation length, or the subsequent food bag vacuuming and sealing processes being affected due to insufficient rotation length.

[0064] Specifically, when the food bag is wound around the roll 210, the sealing machine body 100 performs the following steps during use:

[0065] Step 1: The staff opens the top cover 110, stretches the food bag to a certain length, and then stops stretching the food bag under the action of the pressing mechanism.

[0066] Step 2: The staff cuts the food bag with a cutting device and seals the end of the food bag with a sealing device;

[0067] Step 3: After the food bag is cut, the food bag rotates back to the roll 210 under the action of the clamping mechanism. The food bag stops rotating after rotating to a certain length under the action of the pressing mechanism.

[0068] Step 4: After the staff opens the top cover 110 to remove the food bag and fill it with food, they insert the open side of the food bag into the vacuum device, close the top cover 110, and then use the vacuum device to vacuum the food bag. Finally, they seal the end of the food bag using the sealing device.

[0069] Combination Figure 2As shown, in this embodiment, the lower end face of the upper cover 110 is provided with a knife groove 310 arranged along the length direction of the sealing machine body 100. The cutting device includes a first housing 261 provided at both ends of the knife groove 310. The lower end face of the upper cover 110 is provided with a first housing mounting groove 350 for mounting the first housing 261. The first housing 261 is provided with a first mounting cavity 410. The cutting device includes a cutting blade 220 provided in the knife groove 310 and a mounting unit provided in the first mounting cavity 410 for driving the end of the cutting blade 220 to extend out of and retract into the knife groove 310.

[0070] The first mounting cavity 410 includes a first sub-cavity 411. The mounting unit includes a first rotating ring 421 disposed in the first sub-cavity 411. The first rotating ring 421 is axially parallel to the height direction of the sealing machine body 100. The lower end face of the first rotating ring 421 is provided with a first spiral inclined surface 511 and a second spiral inclined surface 512 arranged in a split configuration. The mounting unit also includes a first mating block 422 and a second mating block 423 for slidingly engaging with the first spiral inclined surface 511 and the second spiral inclined surface 512, respectively.

[0071] The first mounting cavity 410 includes a first opening groove 412 and a second sub-cavity 413 located at the lower end of the first sub-cavity 411 and arranged axially along the first rotating ring 421. The first opening groove 412 penetrates the lower end face of the first housing 261, and the second sub-cavity 413 communicates with the knife groove 310. A first sliding rod 424 for sliding engagement with the first opening groove 412 is fixedly provided at the lower end face of the first mating block 422, and a second sliding rod 425 extending into the second sub-cavity 413 is fixedly provided at the lower end face of the second mating block 423. The cutter 220 is fixedly engaged with the second sliding rod 425.

[0072] The cutting device includes a lifting unit located at the lower cover 120, a first sliding rod 424 for moving upward under the action of the lifting unit and driving the first rotating ring 421 to rotate along its axis, and a second sliding rod 425 for driving the cutter 220 to extend out of the cutter groove 310 under the action of the rotation of the first rotating ring 421.

[0073] By setting up the mounting unit, the end of the cutter 220 can be better driven to extend and retract into the blade groove 310, thus better realizing the cutting of food bags by the cutter 220. After cutting, the cutter 220 can retract into the blade groove 310, thus better reducing the risk to workers when using the cutter 220 to cut food bags.

[0074] In this embodiment, the cutting device also includes a torsion spring 426 with its two ends fixed to the first rotating ring 421 and the side wall of the first sub-cavity 411, respectively. The torsion spring 426 is used to drive the first rotating ring 421 to rotate in the opposite direction after the lifting unit disengages from the first sliding rod 424.

[0075] The mounting unit also includes a cylindrical cylinder 427 fixedly disposed at the lower end face of the second sub-cavity 413. The cylindrical cylinder 427 is provided with a first sliding groove 521 for slidingly engaging with the lower end of the second sliding rod 425. The cylindrical cylinder 427 is fitted with a first compression spring 428 for driving the upper end of the second mating block 423 to be pressed against the second spiral inclined surface 512. The first compression spring 428 is used to drive the second mating block 423 to move upward when the first rotating ring 421 rotates in the opposite direction, so as to drive the cutter 220 to retract into the cutter groove 310.

[0076] The torsion spring 426 enables the cutter 220 to retract into the blade groove 310.

[0077] In this embodiment, a first connecting plate 431 is provided on the inner peripheral wall of the first rotating ring 421. A first mounting post 432 and a second mounting post 433 are respectively provided on the upper and lower ends of the first connecting plate 431. The first mounting cavity 410 also includes a third sub-cavity 414 and a fourth sub-cavity 415 respectively provided on the upper and lower ends of the first sub-cavity 411. The third sub-cavity 414 and the fourth sub-cavity 415 are rotatably engaged with the first mounting post 432 and the second mounting post 433, respectively. The third sub-cavity 414 and the fourth sub-cavity 415 are respectively used to cooperate with the first mounting post 432 and the second mounting post 433 to restrict the axial movement of the first rotating ring 421. A torsion spring 426 is sleeved on the first mounting post 432.

[0078] Through the above, the installation of the first rotating ring 421 and the torsion spring 426, as well as the axial limiting of the first rotating ring 421, can be better achieved, thus improving the stability of the first rotating ring 421 during rotation.

[0079] In this embodiment, a first sector-shaped limiting groove 416 is provided on the inner sidewall of the fourth sub-cavity 415, and a first limiting block 434 is provided on the sidewall of the second mounting post 433 for rotating with the first sector-shaped limiting groove 416. The first sector-shaped limiting groove 416 and the first limiting block 434 cooperate with each other to limit the rotation angle of the first rotating ring 421. Therefore, the rotation angle of the first rotating ring 421 can be limited.

[0080] In this embodiment, a second housing mounting groove 2041 is provided on the upper surface of the lower cover 120, the cutting device includes a second housing 262 provided in the second housing mounting groove 2041, a second mounting cavity is provided in the second housing 262, and the lifting unit includes a first lifting rod 610 provided along the height direction of the sealing machine body 100, and a first lever 810 is provided at the lower end of the first lifting rod 610;

[0081] The second mounting cavity includes a lifting groove 621 with an opening at the upper end, a second inner cavity 622 located at the lower end of the lifting groove 621, and a second opening groove 831 located on the outer wall of the lower cover 120 and communicating with the second inner cavity 622; the lifting groove 621 is used to slide with the first lifting rod 610, and the end of the first lever 810 away from the first lifting rod 610 extends out from the second opening groove 831 to the outer wall of the lower cover 120; a second compression spring 710 is sleeved on the first lifting rod 610, and the second compression spring 710 is located at the upper end of the first lever 810 and is located in the second inner cavity 622;

[0082] The first lever 810 is used to drive the first sliding rod 424 upward through the first lifting rod 610 under the action of an external force. The end of the first sliding rod 424 is used to extend into the first opening groove 412 after the first sliding rod 424 moves upward to squeeze the first sliding rod 424 and make it move upward. The first lifting rod 610 is used to move downward under the action of the second compression spring 710 to disengage from the first sliding rod 424.

[0083] By designing the lifting unit, the upper end of the first lifting rod 610 can only extend into the first opening slot 412 to drive the first rotating ring 421 to rotate after the upper cover 110 and the lower cover 120 are closed, thereby causing the end of the cutter 220 to extend out of the cutter slot 310. Therefore, it is possible to better avoid injury to the workers caused by the end of the cutter 220 extending out of the cutter slot 310 when the upper cover 110 and the lower cover 120 are open, thus better improving the safety of the sealing machine body 100.

[0084] In this embodiment, a first stepped surface 623 is formed between the lifting groove 621 and the second inner cavity 622. The first stepped surface 623 and the first lever 810 cooperate with each other to limit the position of the two ends of the second compression spring 710. Therefore, the two ends of the second compression spring 710 can be better limited.

[0085] In this embodiment, the locking mechanism includes a locking tongue 540 disposed at the lower end face of the first housing 261 and a locking unit disposed in the second mounting cavity; the second mounting cavity also includes a third opening groove 633 and a third inner cavity 634 disposed vertically, the third opening groove 633 being used to engage with the locking tongue 540.

[0086] The locking unit includes two first locking portions 721 disposed in the third inner cavity 634 and arranged in a split manner. The inner end face of the first locking portion 721 is recessed inward to form a first locking groove 722. The two end side walls of the latch 540 expand outward to form locking blocks 541. The locking blocks 541 are used to lock with the first locking groove 722 to prevent the latch 540 from disengaging from the third opening groove 633. A first guide slope 723 is provided at the upper end face of the first locking portion 721. A third compression spring 724 is provided between the outer end face of the first locking portion 721 and the inner side wall of the third inner cavity 634.

[0087] In this embodiment, the locking block 541 is used to move to the first locking groove 722 by pressing the first guide slope 723, and the third compression spring 724 is used to drive the two first locking parts 721 to move towards each other to realize the locking state of the locking block 541 and the first locking groove 722.

[0088] The inner end face of the first locking part 721 is the two facing end faces of the two first locking parts 721; the outer end face of the first locking part 721 is the two back-to-back end faces of the two first locking parts 721.

[0089] With the locking mechanism in place, the locking block 541 at the locking tongue 540 and the first locking groove 722 at the first locking part 721 lock together under the action of the third compression spring 724, which can better lock the upper cover 110 and the lower cover 120, thus facilitating the transfer and movement of the sealing machine body 100. Furthermore, since the upper cover 110 automatically locks after being closed, it facilitates the use by operators and improves the safety of operators when using the sealing machine body 100 to cut, vacuum, and seal food bags.

[0090] In this embodiment, the upper and lower sidewalls of the third inner cavity 634 are each provided with a second limiting groove 635, and the upper and lower ends of the first locking part 721 are provided with second limiting strips 725 for sliding engagement with the corresponding second limiting grooves 635. Therefore, the movement direction of the first locking part 721 is better guided, and the stability of the first locking part 721 during movement is better improved.

[0091] The third inner cavity 634 has third limiting grooves 636 on the inner walls at both ends along the sliding direction of the first locking part 721. The outer end face of the first locking part 721 has third limiting strips 726 that are respectively inserted into the third limiting grooves 636. The third compression spring 724 is sleeved on the third limiting strips 726. Therefore, it is more convenient to install the first locking part 721 and the third compression spring 724, and it is better to reduce the probability of the third compression spring 724 bending when it extends and retracts, thus better improving the stability of the first locking part 721 when it moves.

[0092] In this embodiment, the second mounting cavity further includes a fourth inner cavity 631 and a fifth inner cavity 632 arranged vertically, and a fourth opening groove 832 provided on the side wall of the second housing 262 and communicating with the fifth inner cavity 632;

[0093] The locking unit also includes a second lifting rod 731 that is arranged along the height direction of the sealing machine body 100 and passes through the fourth inner cavity 631. The end of the second lifting rod 731 that extends into the third inner cavity 634 is provided with a second lifting member 732. The lower end face of the first locking part 721 is provided with a second guide slope 727. The lower end of the second lifting rod 731 that extends into the fifth inner cavity 632 is provided with a second lever 820.

[0094] The second lifting rod 731 is used to slide with the fourth inner cavity 631. The end of the second lever 820 away from the second lifting rod 731 extends from the fourth opening slot 832 to the outer wall of the lower cover 120. An eighth compression spring 733 is sleeved on the second lifting rod 731. The eighth compression spring 733 is located at the upper end of the second lever 820 and is located in the second inner cavity 622.

[0095] The second lever 820 is used to drive the second lifting member 732 upward through the second lifting rod 731 under the action of an external force. The second lifting member 732 is used to press the second guide slope 727 when it is in the upward state to drive the two first locking parts 721 to move in opposite directions to release the locking state of the locking block 541 and the first locking groove 722.

[0096] As described above, the locking block 541 at the latch 540 and the first locking groove 722 at the first locking part 721 are released from locking under the action of the second lifting member 732, thus better releasing the locking state between the upper cover 110 and the lower cover 120, thereby facilitating the opening of the upper cover 110.

[0097] In this embodiment, a second stepped surface 637 is formed between the fourth inner cavity 631 and the fifth inner cavity 632. The second stepped surface 637 cooperates with the second lever 820 to limit the position of both ends of the eighth compression spring 733. Therefore, the two ends of the eighth compression spring 733 are preferably limited.

[0098] In this embodiment, the first lever 810 is located to the left of the second lever 820, the first lever 810 is provided with an L-shaped third sliding rod 641, and the second lever 820 is provided with an L-shaped fourth sliding rod 642.

[0099] The cutting device also includes an interlocking unit located in the second mounting cavity; the second mounting cavity includes a sixth inner cavity 741 located along the width direction of the sealing machine body 100, the interlocking unit includes an interlocking component 643 located in the sixth inner cavity 741, the interlocking component 643 is located below the first lever 810 and the second lever 820, and a seventh compression spring 648 is provided between the right side wall of the interlocking component 643 and the inner wall of the sixth inner cavity 741;

[0100] The lower end of the interlocking component 643 is provided with a first interlocking groove 811 and a second interlocking groove 821; the upper end of the right side wall of the first interlocking groove 811 is recessed to the right to form a second interlocking groove 1011; the lower end of the right side wall of the first interlocking groove 811 is inclined from top to bottom to the right to form a third guide slope 1012; the right side wall of the second interlocking groove 821 is a fourth guide slope 1021 that is inclined from top to bottom to the right.

[0101] The first lever 810 is used to push the third guide slope 1012 to the second locking groove 1011 by driving the third sliding rod 641 when moving upward. The interlocking member 643 is used to move to the left under the action of the seventh compression spring 648 to realize the locking state between the first lever 810 and the second locking groove 1011. The locking state between the first lever 810 and the second locking groove 1011 restricts the position of the first lifting rod 610 in the height direction.

[0102] The second lever 820 is used to push the fourth guide slope 1021 by driving the fourth sliding rod 642 to move the interlocking member 643 to the right when moving upward. The first lever 810 moves downward by means of the second compression spring 710 when the interlocking member 643 moves to the right.

[0103] By setting up the interlocking unit, the operator must first move the first lifting rod 610 up until its upper end face extends out of the lifting groove 621, and then close the cover 110 to drive the end face of the first lifting rod 610 into the first opening groove 412 before the end of the cutter 220 can extend out of the cutting groove 310 to cut the food bag; thus, the safety of the operator when using the cutter 220 to cut the food bag is increased.

[0104] Because the interlocking component 643 can maintain the position of the upper end face of the first lifting rod 610 extending out of the lifting groove 621, it facilitates the use of the sealing machine body 100 by the operator. Since the operator retracts the upper end face of the first lifting rod 610 into the lifting groove 621 when releasing the locking state of the upper cover 110 and the lower cover 120, the end of the cutter 220 retracts into the blade groove 310 before opening the upper cover 110, thus improving the safety of the operator when cutting the food bag with the cutter 220. Since the operator retracts the cutter 220 into the blade groove 310 when releasing the locking state of the upper cover 110 and the lower cover 120, it better avoids the situation where the operator forgets to retract the first lifting rod 610 into the lifting groove 621, thereby preventing damage to the food bag by the cutter 220 during processes such as vacuuming and sealing that do not require cutting.

[0105] The locking functions of the upper cover 110 and the lower cover 120 can be used independently. That is, if the operator does not move the first lifting rod 610 upward before closing the upper cover 110, and the operator subsequently moves the second lifting rod 731 upward before opening the upper cover 110 to release the locking state of the upper cover 110 and the lower cover 120, it will not affect the first lifting rod 610. Therefore, it can better prevent the end of the cutter 220 from extending out of the blade groove 310 and causing interference during the vacuuming and sealing process of the food bag.

[0106] In this embodiment, the upper and lower sidewalls of the sixth inner cavity 741 are each provided with a fourth limiting groove 742, and the upper and lower ends of the interlocking member 643 are provided with fourth limiting strips 644 for sliding engagement with the corresponding fourth limiting grooves 742. Therefore, the movement direction of the interlocking member 643 is better guided, and the stability of the interlocking member 643 during movement is better improved.

[0107] In this embodiment, the left and right inner walls of the sixth inner cavity 741 are each provided with a fifth limiting groove 743, and the left and right walls of the interlocking member 643 are respectively provided with fifth limiting strips 645 extending into the corresponding fifth limiting grooves 743. The seventh compression spring 648 is sleeved on the fifth limiting strip 645. Therefore, the installation of the interlocking member 643 and the seventh compression spring 648 is more convenient, and the probability of the seventh compression spring 648 bending during extension and retraction is reduced, thus improving the stability of the interlocking member 643 during movement.

[0108] In this embodiment, the end of the first lever 810 extending out of the second opening slot 831 is provided with a first knob 646, and the end of the second lever 820 extending out of the fourth opening slot 832 is provided with a second knob 647; the third sliding rod 641 is fixedly disposed at the first knob 646, and the fourth sliding rod 642 is fixedly disposed at the second knob 647. Therefore, it is more convenient for the operator to drive the first lifting lever 610 and the third sliding rod 641, and the second lifting lever 731 and the fourth sliding rod 642 to move up and down synchronously.

[0109] Specifically, when used alone, the locking mechanism has the following steps:

[0110] Step 1: The locking mechanism locks the upper cover 110 and the lower cover 120.

[0111] After the staff closes the upper cover 110, the locking tongue 540 at the upper cover 110 is inserted into the third inner cavity 634 at the lower cover 120 from the third opening slot 633; ​​the locking block 541 at the locking tongue 540 presses against the first guide slope 723 at the first locking part 721, driving the two first locking parts 721 to move in opposite directions; when the locking block 541 moves to the first locking groove 722, the two first locking parts 721 move towards each other under the elastic force of the third compression spring 724, and the locking block 541 and the first locking groove 722 engage with each other.

[0112] Step 2: Release the locking state of the upper cover 110 and the lower cover 120.

[0113] The operator moves the second dial 647 upward, causing the second lever 820, the second lifting lever 731, and the second lifting member 732 to move upward simultaneously. The second lifting member 732 presses against the second guide slope 727 at the first locking part 721, causing the two first locking parts 721 to move in opposite directions. The locking block 541 separates from the first locking groove 722, and the locking state is released. At the same time, the operator rotates to open the upper cover 110, and the locking block 541 leaves the lower cover 120 from the third opening groove 633 along with the locking tongue 540. The operator releases the second dial 647, and the second lifting lever 731, under the action of the eighth compression spring 733, moves the second lever 820, the second lifting member 732, and the second dial 647 downward simultaneously. The two first locking parts 721 are reset under the elastic force of the third compression spring 724.

[0114] Specifically, the cutting device has the following steps when in use:

[0115] Step 1: Staff open the top cover 110.

[0116] Step 2: The operator moves the first dial 646 upward, thereby causing the first lever 810, the first lifting lever 610, and the third sliding lever 641 to move upward synchronously. The first lifting lever 610 moves upward until its upper end extends out of the lifting groove 621; during the upward movement of the third sliding lever 641, its upper end gradually presses against the third guide slope 1012 of the first interlock groove 811 located at the interlocking member 643, thereby driving the interlocking member 643 to move to the right. When the upper end of the third sliding lever 641 moves to the second locking groove 1011, the interlocking member 643 moves to the left under the action of the seventh compression spring 648 and drives the upper end of the third sliding lever 641 to lock with the second locking groove 1011, thus keeping the upper end of the first lifting lever 610 in the position of extending out of the lifting groove 621.

[0117] Step 3: The staff closes the cover (110).

[0118] The upper end of the first lifting rod 610 extends into the first opening groove 412 located at the upper cover 110 and gradually presses the first sliding rod 424 upward. During the upward movement of the first sliding rod 424, it drives the first mating block 422 to press the first spiral inclined surface 511, thereby driving the first rotating ring 421 to rotate. Under the action of rotation, the second spiral inclined surface 512 presses the second mating block 423. The second mating block 423 drives the second sliding rod 425 to move downward synchronously, thereby driving the lower end of the cutter 220 to extend out of the blade groove 310 to cut the food bag. The locking tongue 540 at the upper cover 110 is inserted into the third inner cavity 634, so that the locking block 541 at the locking tongue 541 and the first locking groove 722 at the first locking part 721 are engaged with each other. The upper cover 110 and the lower cover 120 are locked together.

[0119] Step 5: The operator moves the first lever 646 upward, thereby causing the first lifting rod 610, the second lifting rod 731, the second lifting member 732, and the fourth sliding rod 642 to move upward synchronously. During the upward movement of the fourth sliding rod 642, its upper end gradually presses against the fourth guide slope 1021 of the second interlock groove 821 located at the interlock member 643, thereby driving the interlock member 643 to move to the right, causing the upper end of the third sliding rod 641 to disengage from the second locking groove 1011; thus causing the first lifting rod 610 to move upward. Under the action of the second compression spring 710, the first lifting rod 610 moves downward, that is, the upper end of the first lifting rod 610 disengages from the first sliding rod 424 and retracts into the lifting groove 621; the first rotating ring 421 is reset under the action of the torsion spring 426, and the second mating block 423 and the second sliding rod 425 move upward synchronously under the action of the first compression spring 428, driving the lower end of the cutter 220 to extend out of the cutter groove 310; at the same time, the first mating block 422 drives the first sliding rod 424 to move downward synchronously under the squeezing action of the first spiral inclined surface 511.

[0120] Step 6: After the staff opens the top cover 110, they release the second dial 647. Under the action of the eighth compression spring 733, the second lifting rod 731 drives the second lever 820, the second lifting component 732, and the second dial 647 to move down and reset.

[0121] In this embodiment, the cutting device includes a cutting blade mounting base 440 disposed at the blade groove 310. The two ends of the cutting blade mounting base 440 extending into the corresponding second sub-cavity 413 are respectively fixed to the second sliding rod 425. A cutting blade mounting groove 530 is provided on the lower end face of the cutting blade mounting base 440, and the cutting blade 220 is installed in the cutting blade mounting groove 530. Therefore, the installation of the cutting blade 220 is more convenient, thereby facilitating the replacement of the cutting blade 220.

[0122] In this embodiment, a first storage groove 231 is provided at the upper end face of the lower cover 120, and a second storage groove 232 is provided at the lower end face of the upper cover 110. The first storage groove 231 and the second storage groove 232 together form a food bag storage groove. The scroll 210 is located at the first storage groove 231, and one end of the food bag is fixedly located at the side wall of the scroll 210.

[0123] The upper end face of the lower cover 120 is provided with a third housing mounting groove 2042. The clamping mechanism includes a third housing 263 provided in the third housing mounting groove 2042. The third housing 263 is provided with a third mounting cavity. The third mounting cavity includes a first rotating cavity 1210 that communicates with the first storage groove 231. The clamping mechanism includes a first rotating member 1220, a second rotating member 1230 and a third sliding member 1240 that are arranged coaxially in the first rotating cavity 1210. The scroll 210 is provided at the end of the first rotating member 1220.

[0124] A first elastic element is provided between the third sliding member 1240 and the side wall of the first rotating cavity 1210. The first elastic element is used to drive the third sliding member 1240 to move toward the second rotating member 1230 so that the end face of the third sliding member 1240 is squeezed at the end face of the second rotating member 1230.

[0125] The third mounting cavity includes a fifth opening groove 1361 located on the upper end face of the third housing 263 and communicating with the first rotating cavity 1210. A pressing member 211 is provided at the fifth opening groove 1361, and a fitting member 1241 for sliding engagement with the pressing member 211 is provided on the side wall of the third sliding member 1240. The pressing member 211 is used to drive the third sliding member 1240 to move away from the second rotating member 1230 through the fitting member 1241 under the pressing action, so as to realize the separation of the third sliding member 1240 from the second rotating member 1230.

[0126] A second elastic member is provided between the first rotating member 1220 and the second rotating member 1230. The second elastic member is used to drive the second rotating member 1230 to move toward the first rotating member 1220 so that the end face of the second rotating member 1230 is pressed against the end face of the first rotating member 1220. A third elastic member is provided between the second rotating member 1230 and the inner wall of the first rotating cavity 1210. The third elastic member is used to drive the second rotating member 1230 to rotate in the opposite direction.

[0127] The first rotating member 1220 and the second rotating member 1230 are respectively provided with a first engaging portion and a second engaging portion for engaging with each other. The first engaging portion and the second engaging portion are used to restrict the first rotating member 1220 from rotating in the forward direction relative to the second rotating member 1230 when the first rotating member 1220 and the second rotating member 1230 are squeezed together. The second rotating member 1230 and the third sliding member 1240 are respectively provided with a third engaging portion and a fourth engaging portion for engaging with each other. The third engaging portion and the fourth engaging portion are used to restrict the second rotating member 1230 from rotating in the reverse direction when the second rotating member 1230 and the third sliding member 1240 are squeezed together.

[0128] The clamping mechanism in this embodiment facilitates the worker's pulling of the food bag to rotate the roll 210 in the forward direction and enables the roll 210 to rotate automatically in the reverse direction.

[0129] When the top cover 110 is open, the food bag is preferably prevented from rotating under the action of the third elastic element after the external force applied to it is removed when the operator stretches the food bag, thus facilitating repeated stretching and closing of the food bag and the top cover 110. When the top cover 110 is closed, the roller 210 can be automatically reversed to drive the food bag to rotate; and when the end of the food bag is fixed, the roller 210 stops rotating.

[0130] Specifically, under the action of the second elastic member, the end face of the second rotating member 1230 is pressed against the end face of the first rotating member 1220. When the end face of the first rotating member 1220 and the end face of the second rotating member 1230 are pressed against each other, the first rotating member 1220 cannot rotate in the forward direction relative to the second rotating member 1230 under the action of the first engaging part and the second engaging part. That is, the second rotating member 1230 can only rotate in the forward direction relative to the first rotating member 1220, and the second rotating member 1230 and the first rotating member 1220 rotate in the same direction.

[0131] Specifically, when the top cover 110 is opened, the end face of the third sliding member 1240 is pressed against the end face of the second rotating member 1230 under the action of the first elastic member. When the end face of the third sliding member 1240 and the end face of the second rotating member 1230 are pressed against each other, the second rotating member 1230 cannot rotate in the reverse direction under the action of the third engaging part and the fourth engaging part. That is, the second rotating member 1230 can only rotate in the forward direction.

[0132] Specifically, after the upper cover 110 is closed, the upper cover 110 presses the pressing member 211 to move it downward, causing the end face of the third sliding member 1240 to separate from the end face of the second rotating member 1230, so that the second rotating member 1230 can rotate in the opposite direction.

[0133] In this embodiment, the third engaging portion includes a plurality of third engaging teeth 1235 spaced circumferentially along the end face of the second rotating member 1230, and the fourth engaging portion includes a plurality of fourth engaging teeth 1244 spaced circumferentially along the end face of the third sliding member 1240. The third engaging teeth 1235 are used to engage with the fourth engaging teeth 1244. The third engaging teeth 1235 include a fifth spiral inclined surface 1236 and a third locking surface 1237 continuously arranged, and the fourth engaging teeth 1244 include a sixth spiral inclined surface 1245 and a fourth locking surface 1246 continuously arranged. The fifth spiral inclined surface 1236 and the sixth spiral inclined surface 1245 are slidably engaged, and the third locking surface 1237 and the fourth locking surface 1246 cooperate with each other to restrict the second rotating member 1230 from rotating in the opposite direction relative to the third sliding member 1240.

[0134] As described above, when the end face of the third sliding member 1240 abuts against the end face of the second rotating member 1230, the third locking surface 1237 and the fourth locking surface 1246 cooperate to better restrict the reverse rotation of the second rotating member 1230; the fifth helical inclined surface 1236 and the sixth helical inclined surface 1245 slide together to better realize the forward rotation of the second rotating member 1230.

[0135] In this embodiment, the first engaging portion includes a plurality of first engaging teeth 1221 spaced apart circumferentially along the end face of the first rotating member 1220, and the second engaging portion includes a plurality of second engaging teeth 1232 spaced apart circumferentially along the end face of the second rotating member 1230. The first engaging teeth 1221 are used to engage with the second engaging teeth 1232. The first engaging teeth 1221 include a continuously arranged third helical inclined surface 1222 and a first locking surface 1223, and the second engaging teeth 1232 include a continuously arranged fourth helical inclined surface 1233 and a second locking surface 1234. The third helical inclined surface 1222 and the fourth helical inclined surface 1233 are slidably engaged, and the first locking surface 1223 and the second locking surface 1234 cooperate with each other to restrict the first rotating member 1220 from rotating in the forward direction relative to the second rotating member 1230.

[0136] Through the above, the first locking surface 1223 and the second locking surface 1234 cooperate to better restrict the forward rotation of the first rotating member 1220 relative to the second rotating member 1230, thus better realizing the synchronous rotation of the first rotating member 1220 and the second rotating member 1230; the sliding cooperation of the third helical inclined surface 1222 and the fourth helical inclined surface 1233 better realizes the reverse rotation of the first rotating member 1220 relative to the second rotating member 1230.

[0137] In this embodiment, the third elastic element includes a spring 1231 with its two ends fixed to the outer wall of the second rotating element 1230 and the inner wall of the first rotating cavity 1210, respectively. Therefore, the automatic reverse rotation of the second rotating element 1230 is preferably achieved, and the installation of the spring 1231 is also preferably facilitated.

[0138] In this embodiment, the third sliding member 1240 is provided with a first through hole 1321 extending through the axial direction of the scroll 210. The inner wall of the middle part of the first through hole 1321 expands radially toward the axis of the first through hole 1321 to form a second flange 1322. The side wall of the first rotating cavity 1210 is provided with a first guide post 1351 extending toward the direction of the scroll 210. The first guide post 1351 slides with the inner wall of the second flange 1322. Therefore, the moving direction of the third sliding member 1240 is better guided, thereby improving the stability of the axial movement of the third sliding member 1240.

[0139] In this embodiment, the second rotating member 1230 is provided with a second through hole 1341 extending through the second rotating member 1230 along the axial direction of the scroll 210. A second connecting plate 1342 is provided on the inner wall of the middle part of the second through hole 1341. A second guide post 1345 is provided on the end face of the second connecting plate 1342 facing the second flange 1322, which is parallel to the axial direction of the scroll 210. A first guide groove 1343 is provided on the end face of the second guide post 1345 facing the second flange 1322 for sliding engagement with the first guide post 1351. The first guide post 1351 and the first guide groove 1343 are rotatably engaged. Therefore, the movement and rotation direction of the second rotating member 1230 and the movement direction of the third sliding member 1240 are better guided, thereby improving the stability of the axial movement and rotation of the second rotating member 1230 and the stability of the axial movement of the third sliding member 1240.

[0140] In this embodiment, a third guide post 1334 is provided on the end face of the second connecting plate 1342 facing away from the second flange 1322, and is axially arranged parallel to the scroll 210. A first mounting groove 1331 is provided on the end face of the first rotating member 1220 facing the second rotating member 1230. A second guide groove 1332 is provided on the bottom surface of the first mounting groove 1331 for sliding engagement with the third guide post 1334. The third guide post 1334 and the second guide groove 1332 are rotatably engaged. Therefore, the movement and rotation direction of the second rotating member 1230 are better guided, thereby improving the stability of the axial movement and rotation of the second rotating member 1230.

[0141] In this embodiment, the second elastic element includes a first tension spring 1345 sleeved on the third guide post 1334, and a first rotating element 1333 for axial rotation along the scroll 210 is provided at the bottom wall of the first mounting groove 1331. The two ends of the first tension spring 1345 are respectively fixed to the first rotating element 1333 and the second connecting plate 1342. Therefore, the installation of the first tension spring 1345 is more convenient, and bending of the first tension spring 1345 during extension and contraction is better avoided, thus improving the stability of the second rotating element 1230 during axial movement. At the same time, the rotatable first rotating element 1333 better avoids interference with the first tension spring 1345 when the second rotating element 1230 rotates alone.

[0142] In this embodiment, the outer end face of the third housing 263 is provided with a sixth opening groove 1352 communicating with the first rotating cavity 1210, and a sealing member 1251 for sealing the sixth opening groove 1352; one end of the first guide post 1351 is fixedly disposed at the end face of the sealing member 1251. The outer end face of the lower cover 120 is the two end faces of the lower cover 120 located along the length of the sealing machine body 100. Therefore, it is more convenient to install the first rotating member 1220, the second rotating member 1230, and the third sliding member 1240.

[0143] In this embodiment, the first elastic element includes a fourth compression spring 1352 sleeved on the first guide post 1351, and the sealing element 1353 and the second flange 1322 are used to limit the two ends of the fourth compression spring 1352. Therefore, it is more convenient to install the fourth compression spring 1352, and more preferably, it achieves the limitation of the two ends of the fourth compression spring 1352.

[0144] In this embodiment, a sixth limiting groove 1212 for sliding engagement with the mating member 1241 is provided on the side wall of the first rotating cavity 1210. Therefore, the moving direction of the third sliding member 1240 is better guided, thereby restricting the circumferential rotation of the third sliding member 1240.

[0145] In this embodiment, a fifth guide slope 1242 is formed on the upper end face of the mating member 1241, and the lower end face of the pressing member 211 is used to press the fifth guide slope 1242 when moving downwards to realize the movement of the third sliding member 1240 away from the second rotating member 1230. Therefore, the axial movement of the third sliding member 1240 is preferably realized when the mating member 1241 moves downwards.

[0146] In this embodiment, a third stepped surface 1213 is formed between the fifth opening groove 1361 and the sixth limiting groove 1212. A first flange 1243 is provided on the side wall of the mating member 1241. The first flange 1243 is used to engage with the third stepped surface 1213 to restrict the mating member 1241 from disengaging from the fifth opening groove 1361. Therefore, the disengagement of the mating member 1241 from the fifth opening groove 1361 is preferably restricted.

[0147] In this embodiment, the end of the first rotating member 1220 facing the scroll 210 is provided with a first fixing groove 1311, and the two ends of the scroll 210 are provided with first fixing blocks 1312 for inserting and engaging with the corresponding first fixing grooves 1311. Therefore, the installation between the first rotating member 1220 and the scroll 210 is more convenient, and the co-rotation of the first rotating member 1220 and the scroll 210 is more preferably realized.

[0148] Specifically, the clamping mechanism has the following steps when in use:

[0149] Step 1: The worker opens the top cover 110 and pulls the food bag, causing the roll 210 and the first rotating component 1220 to rotate synchronously in the forward direction. At this time, the end face of the first rotating component 1220 and the end face of the second rotating component 1230 are pressed together, and the first locking surface 1223 of the first rotating component 1220 and the second locking surface 1234 of the second rotating component 1230 are locked together, so that the second rotating component 1230 and the first rotating component 1220 rotate synchronously in the forward direction. Since the fifth spiral inclined surface 1236 at the third locking tooth 1235 and the sixth spiral inclined surface 1245 at the fourth locking tooth 1244 slide together, during the rotation of the second rotating component 1230, its third locking tooth 1235 repeatedly disengages from the corresponding fourth locking tooth 1244 at the third sliding component 1240 and engages with the adjacent fourth locking tooth 1244, so that the second rotating component 1230 disengages from the third sliding component 1240 and rotates in the forward direction independently.

[0150] Step 2: After the staff finishes pulling the food bag, the end face of the third sliding member 1240 and the end face of the second rotating member 1230 are pressed together, and the fourth locking surface 1246 of the third sliding member 1240 and the third locking surface 1237 of the second rotating member 1230 are locked together, so the second rotating member 1230 cannot rotate in the opposite direction relative to the third sliding member 1240, and therefore the roller 210 stops rotating.

[0151] Step 3: The worker closes the top cover 110. The lower end face of the top cover 110 presses the pressing member 211, causing it to move downwards. This causes the fifth guide slope 1242 at the lower end of the pressing member 211 to press the mating member 1241, which in turn causes the mating member 1241 and the third sliding member 1240 to move synchronously away from the second rotating member 1230. Consequently, the third sliding member 1240 disengages from the second rotating member 1230, and the locking state of the fourth locking surface 1246 and the third locking surface 1237 is released. Under the action of the spring 1231, the second rotating member 1230 rotates in the opposite direction. Due to the action of the first tension spring 1345, the end faces of the first rotating member 1220 and the second rotating member 1230 are pressed together, that is, the first locking tooth 1221 and the second locking tooth 1232 are engaged. At this time, the second rotating member 1230 drives the first rotating member 1220 and the scroll 210 to rotate synchronously in the opposite direction, driving the food bag back to the scroll 210. Once the end of the food bag is fixed, the roll 210 and the first rotating member 1220 stop rotating. At this time, since the third spiral inclined surface 1222 at the first locking tooth 1221 and the fourth spiral inclined surface 1233 at the second locking tooth 1232 slide together, the second locking tooth 1232 of the second rotating member 1230 repeatedly disengages from the corresponding first locking tooth 1221 at the first rotating member 1220 and engages with the adjacent first locking tooth 1221 during the rotation of the second rotating member 1230.

[0152] In this embodiment, a third storage groove 2011 is provided at the lower cover 120, and a fourth storage groove 241 is provided at the upper cover 110. The third storage groove 2011 and the fourth storage groove 241 together form a pressure roller mounting groove.

[0153] The pressing mechanism includes a first pressure roller 1111 and a second pressure roller 1112 located at the pressure roller mounting groove. A first hole is formed between the first pressure roller 1111 and the second pressure roller 1112 for the food bag to pass through. The food bag is used to drive the first pressure roller 1111 and the second pressure roller 1112 to rotate when moving. The first pressure roller 1111 and the second pressure roller 1112 are used to restrict the movement of the food bag when stationary. The pressing mechanism also includes a limiting unit located at both ends of the first pressure roller 1111 and used to limit the rotation of the first pressure roller 1111. The first pressure roller 1111 is used to limit the movement of the food bag when stationary.

[0154] Through the above, the movement of the food bag can be better restricted by limiting the rotation of the first pressure roller 1111, thereby better realizing the length of the food bag's stretching and rotation.

[0155] In this embodiment, a fourth housing mounting groove 043 is provided at the upper end of the lower cover 120. The limiting unit includes a fourth housing 264 provided at the fourth housing mounting groove 2043. A fourth mounting cavity for mounting the limiting unit is provided at the fourth housing 264. The fourth mounting cavity includes a second rotating groove 1811 communicating with the third storage groove 2011 and a first closing cavity 1812 communicating with the second rotating groove 1811.

[0156] The limiting unit includes a third rotating member 1410, a fourth rotating member 1420, and a fifth rotating member 1630 arranged coaxially along the axial direction of the roll 210; the first pressure roller 1111 is located at the third storage groove 2011, the third rotating member 1410 is fixedly located at the end of the second pressure roller 1112, the third rotating member 1410 is rotatably engaged with the second rotating groove 1811, and the fourth rotating member 1420 and the fifth rotating member 1630 are located at the first closing cavity 1812;

[0157] The first cavity 1812 is further provided with a first driven member 1441 and a second driven member 1442 coaxially arranged, and a driven shaft 1440 for mounting the first driven member 1441 and the second driven member 1442; the third rotating member 1410 drives the first driven member 1441 to rotate so that the fourth rotating member 1420 rotates synchronously with the first driven member 1441, and the fourth rotating member 1420 drives the second driven member 1442 to rotate so that the fifth rotating member 1630 rotates synchronously with the second driven member 1442;

[0158] A first stop 1711 is provided on the outer peripheral wall of the fifth rotating member 1630, and a second locking part is provided in the first cavity 1812. The second locking part includes the second stop 1712. The first pressure roller 1111 is used to stop the rotation when the fifth rotating member 1630 rotates to the point where the second stop 1712 abuts against the first stop 1711.

[0159] The fourth rotating member 1420 has a plurality of third locking grooves 1510 spaced along its circumference on its outer peripheral wall, and the first engagement cavity 1812 has a third locking part 1520 for cooperating with the third locking grooves 1510 to restrict the fourth rotating member 1420 from rotating in the opposite direction.

[0160] In this embodiment, when the fourth rotating member 1420 rotates forward until the fifth rotating member 1630 stops rotating, the third locking part 1520 is located between the two third locking grooves 1510.

[0161] Through the above, the stretching and rotation length of the food bag can be limited by limiting the number of rotations of the first pressure roller 1111.

[0162] The arrangement of the third rotating member 1410, the fourth rotating member 1420, the fifth rotating member 1630, the first driven member 1441, and the second driven member 1442 better realizes the differential rotation among the third rotating member 1410, the fourth rotating member 1420, and the fifth rotating member 1630, thereby better realizing the limitation of the number of rotations of the third rotating member 1410 by limiting the rotation angle of the fifth rotating member 1630, and thus achieving the equal length stretching of the food bag.

[0163] The third locking part 1520 and the third locking groove 1510 cooperate to enable the fourth rotating member 1420 to rotate forward and restrict the fourth rotating member 1420 to rotate in reverse. Therefore, when the fourth rotating member 1420 rotates forward until the fifth rotating member 1630 stops rotating, the third locking part 1520 is located between the two third locking grooves 1510. At this time, when the food bag rotates and drives the third rotating member 1410 to rotate in reverse until the third locking part 1520 and the third locking groove 1510 cooperate with each other, the fourth rotating member 1420 stops rotating in reverse, thereby realizing the equal length rotation of the food bag.

[0164] In this embodiment, the upper end of the fourth housing 264 is provided with two pressure roller mounting seats 1121, and a pressure roller mounting shaft 1122 for mounting the second pressure roller 1112 is connected between the two pressure roller mounting seats 1121. The second pressure roller 1112 is rotatably engaged with the pressure roller mounting shaft 1122. Therefore, the mounting of the second pressure roller 1112 can be achieved better.

[0165] In this embodiment, the outer periphery of the third rotating member 1410 is provided with a first meshing tooth 1411, and the outer periphery of the first driven member 1441 and the fourth rotating member 1420 are respectively provided with N second meshing teeth 1443 and third meshing teeth 1421 at intervals along their circumference, where N is a positive integer; the second meshing teeth 1443 are used to mesh with the first meshing teeth 1411, and the third meshing teeth 1421 are used to mesh with the second meshing teeth 1443;

[0166] The outer peripheral wall of the fourth rotating member 1420 is also provided with a fourth meshing tooth 1422 for meshing with the third meshing tooth 1421. The third meshing tooth 1421 and the fourth meshing tooth 1422 are respectively provided at both ends of the fourth rotating member 1420. The outer peripheral walls of the second driven member 1442 and the fifth rotating member 1630 are respectively provided with N fifth meshing teeth 1444 and sixth meshing teeth 1431 at intervals. The fifth meshing teeth 1444 are used to mesh with the fourth meshing tooth 1422, and the sixth meshing teeth 1431 are used to mesh with the fifth meshing teeth 1444.

[0167] Through the above, differential rotation between the third rotating component 1410, the fourth rotating component 1420 and the fifth rotating component 1630 is preferably achieved.

[0168] In this embodiment, the upper end face of the fourth housing 264 is provided with an eighth opening groove 1910 communicating with the first cavity 1812. The second locking part includes a third lifting rod 1713 for slidingly engaging with the eighth opening groove 1910. The end of the third lifting rod 1713 extending into the first cavity 1812 is provided with a third flange 1714. The second stop 1712 is provided at the lower end face of the third flange 1714. A lifting ring 1610 is provided at the end face of the third lifting rod 1713 extending out of the upper side wall of the lower cover 120.

[0169] A fourth stepped surface 1715 is formed between the first cavity 1812 and the eighth opening groove 1910. A fifth compression spring 1716 is provided at the third lifting rod 1713 between the third flange 1714 and the fourth stepped surface 1715. The lifting ring 1610 is used to cooperate with the upper side wall of the lower cover 120 to restrict the second locking part from disengaging from the eighth opening groove 1910.

[0170] The fifth compression spring 1716 is used to drive the second stop 1712 to move down so that the first stop 1711 and the second stop 1712 are in abutting state. The lifting ring 1610 is used to move up under the action of an external force so that the first stop 1711 and the second stop 1712 are disengaged.

[0171] As described above, the second stop 1712, under the action of the fifth compression spring 1716, moves downward to limit the first stop 1711 at the fifth rotating member 1630, thereby better restricting the rotation angle of the fifth rotating member 1630. After moving upward, the second stop 1712 releases the restriction on the first stop 1711 at the fifth rotating member 1630, thereby better releasing the restriction on the rotation of the fifth rotating member 1630. Therefore, the equal length stretching of the food bag is better achieved.

[0172] In this embodiment, the third locking groove 1510 is disposed between the third meshing tooth 1421 and the fourth meshing tooth 1422; the first engagement cavity 1812 has a second sliding groove 1521 on its side wall, and the third locking part 1520 is disposed in the second sliding groove 1521. The second sliding groove 1521 is also provided with a sixth compression spring 1523 for driving the third locking part 1520 to move radially toward the axis of the fourth rotating member 1420 until its end extends out of the third locking part 1520; the end of the third locking part 1520 is used to engage with the third locking groove 1510 to restrict the reverse rotation of the fourth rotating member 1420.

[0173] As described above, after the fourth rotating member 1420 rotates in the reverse direction until the fifth locking surface 1511 and the sixth locking surface 1522 lock together, the fourth rotating member 1420 stops rotating, that is, the food bag stops rotating. Since the number of rotations of the third rotating member 1410, the fourth rotating member 1420 and the fifth rotating member 1630 are in a multiple relationship, it is preferable that after the fifth rotating member 1630 rotates in the forward direction until the first stop 1711 and the second stop 1712 lock together, the relative positions between the third locking part 1520 and the third locking groove 1510 are the same, thus preferably achieving equal-length rotation of the food bag.

[0174] In this embodiment, the third locking groove 1510 includes a fifth locking surface 1511 radially disposed along the fourth rotating member 1420, and a sixth locking surface 1522 is provided at the end of the third locking portion 1520 facing the fourth rotating member 1420. The fifth locking surface 1511 and the sixth locking surface 1522 cooperate with each other to restrict the end of the third locking portion 1520 from disengaging from the third locking groove 1510. This prevents the third locking portion 1520 from disengaging from the third locking groove 1510 when the fourth rotating member 1420 rotates in the reverse direction, thus better restricting the reverse rotation of the fourth rotating member 1420.

[0175] In this embodiment, the third locking groove 1510 further includes a sixth guide slope 1512. The fifth locking surface 1511 and the sixth guide slope 1512 are arranged facing each other. The end of the third locking part 1520 facing the fourth rotating member 1420 is provided with a seventh guide slope 1921 for sliding engagement with the sixth guide slope 1512. The sixth guide slope 1512 is used to press the seventh guide slope 1921 under the forward rotation of the fourth rotating member 1420 to realize that the end of the third locking part 1520 disengages from the third locking groove 1510. Thus, when the fourth rotating member 1420 rotates forward, the third locking part 1520 can disengage from the third locking groove 1510, thereby preferably realizing the forward rotation of the fourth rotating member 1420.

[0176] Specifically, the clamping mechanism, when used, has the following steps:

[0177] Step 1: Open the top cover 110. The worker stretches the food bag, causing the first pressure roller 1111 and the third rotating component 1410 to rotate in the forward direction. Under the meshing action of the first meshing tooth 1411, the second meshing tooth 1443 and the third meshing tooth 1421, the number of forward rotations of the third rotating component 1410 is twice the number of forward rotations of the fourth rotating component 1420. Under the action of the fourth meshing tooth 1422, the fifth meshing tooth 1444 and the sixth meshing tooth 1431, the number of forward rotations of the fourth rotating component 1420 is twice the number of forward rotations of the fifth rotating component 1630. When the fourth rotating member 1420 rotates until the third locking part 1520 extends into the third locking groove 1510 under the action of the sixth compression spring 1523, the sixth guide slope 1512 at the fourth rotating member 1420 presses against the seventh guide slope 1921, driving the third locking part 1520 to move away from the fourth rotating member 1420 until the third locking part 1520 disengages from the third locking groove 1510, thus allowing the fourth rotating member 1420 to continue rotating in the forward direction. When the fifth rotating member 1630 rotates in the forward direction until the first stop 1711 abuts against the second stop 1712, the fifth rotating member 1630 stops rotating, causing the fourth rotating member 1420, the third rotating member 1410, and the first pressure roller 1111 to stop rotating, thus preventing the food bag from being stretched further. At this time, the fourth rotating member 1420 rotates until the third locking part 1520 is located between the two third locking grooves 1510.

[0178] Step 2: After the food bag is cut, the top cover 110 is closed. Under the action of the spring 1231, the food bag rotates, causing the first pressure roller 1111 and the third rotating component 1410 to rotate in opposite directions, which in turn causes the fourth rotating component 1420 to rotate in opposite directions. When the third locking part 1520 at the fourth rotating component 1420 rotates to the third locking groove 1510, the third locking part 1520 extends into the third locking groove 1510 under the action of the sixth compression spring 1523. Under the action of the fifth locking surface 1511 and the sixth locking surface 1522, the third locking part 1520 and the third locking groove 1510 lock together, and the fourth rotating component 1420 stops rotating in opposite directions.

[0179] Step 3: When the staff stretches the food bag again, the lifting ring 1610 drives the third lifting rod 1713 and the second stop 1712 to move upward, the first stop 1711 and the second stop 1712 separate from each other, and the fifth rotating part 1630 rotates in the forward direction.

[0180] In this embodiment, a second mounting groove 2021 is provided at the upper end face of the lower cover. The vacuuming device includes a sealing structure, which includes an upper vacuum member 240 with an upper vacuum groove 241 located at the lower end face of the upper cover 110, and a lower vacuum member 243 with a lower vacuum groove 242 located in the second mounting groove 2021. The sealing structure also includes a driving unit located in the second mounting groove 2021 for driving the lower vacuum member 243 to move up and down. The lower vacuum member 243 is used to form a second gap between itself and the upper vacuum member 240 after moving down to the second mounting groove 2021, allowing the food bag to pass through and move. The upper vacuum member 240 is used to achieve a sealed fit between the upper vacuum member 240 and the lower vacuum member 243 after moving up to abut against the upper vacuum member 240.

[0181] In this embodiment, when the lower vacuum member 243 moves upward, it moves toward the upper vacuum member 240; when the lower vacuum member 243 moves downward, it moves away from the upper vacuum member 240.

[0182] In this embodiment, the vacuum pumping device also includes an air pump for extracting air from the lower vacuum tank 242 and the upper vacuum tank 241. The air pump can adopt an existing conventional structure, and the air pumping pipe is connected to the upper vacuum tank 241.

[0183] Since the opening side of the food bag is located in the lower vacuum groove 242 and the upper vacuum groove 241, and the lower vacuum component 243 and the upper vacuum component 240 are sealed, the air pump can extract the air from the food bag by extracting the air in the lower vacuum groove 242 and the upper vacuum groove 241; the principle and technology of the air pump to extract air adopt existing technology.

[0184] By configuring the vacuuming device, when the lower vacuum component 243 is located in the second mounting groove 2021, a second gap is formed between the upper vacuum component 240 and the lower vacuum component 243. At this time, the food bag can move, thus allowing the cut-end food bag to rotate normally when the vacuuming process is not performed. After the lower vacuum component 243 moves upward to form a sealing fit with the upper vacuum component 240, the food bag can undergo the vacuuming process. The vacuuming device can control the sealing state between the upper vacuum component 240 and the lower vacuum component 243 by controlling the upward movement of the lower vacuum component 243, thereby reducing the probability of the upper vacuum component 240 and the lower vacuum component 243 squeezing the food bag too tightly, which could lead to vacuuming failure.

[0185] In this embodiment, the driving unit includes a first mating strip 2110 fixedly disposed at the lower end face of the lower vacuum component 243 along the length direction of the sealing machine body 100, and the lower end face of the first mating strip 2110 forms an eighth guide slope 2111; the driving unit also includes a third mating block 2031, the upper end face of the third mating block 2031 forming a ninth guide slope 2035 for sliding engagement with the eighth guide slope 2111; the third mating block 2031 is used to drive the lower vacuum component 243 to move up and down by moving along the length direction of the sealing machine body 100.

[0186] Through the above methods, the upward and downward movement of the lower vacuum component 243 is achieved more effectively. Since the upward and downward movement distances of the lower vacuum component 243 are relatively short, using the cooperation of the eighth guide ramp 2111 and the ninth guide ramp 2035 to drive the lower vacuum component 243 upward and downward can better improve the accuracy of the upward and downward movement amounts.

[0187] In this embodiment, the drive unit further includes a lead screw 2032 disposed in the second mounting groove 2021 for driving the third mating block 2031 to move, and a motor 2034 for driving the lead screw 2032 to rotate; the third mating block 2031 is provided with a mating hole 2211 for threaded engagement with the lead screw 2032.

[0188] Through the above, the third mating block 2031 is better driven to move along the length direction of the sealing machine body 100. The lead screw 2032 better improves the moving accuracy of the third mating block 2031, thereby improving the accuracy of the upward and downward movement of the lower vacuum component 243.

[0189] In this embodiment, a third guide groove 2112 with a T-shaped cross section is provided at the eighth guide inclined surface 2111, and a sixth limiting strip 2036 with a T-shaped cross section is provided at the ninth guide inclined surface 2035 for sliding cooperation with the third guide groove 2112. The third guide groove 2112 is used to cooperate with the sixth limiting strip 2036 to restrict the first cooperating strip 2110 from disengaging from the third cooperating block 2031.

[0190] Through the above methods, the moving direction of the lower vacuum component 243 and the moving direction of the third mating block 2031 are better guided, thereby improving the stability of the lower vacuum component 243 and the third mating block 2031 during movement. Specifically, the third guide groove 2112, with a T-shaped cross-section, and the sixth limiting bar 2036 can better prevent separation between the lower vacuum component 243 and the third mating block 2031.

[0191] In this embodiment, the driving unit further includes a fourth guide post 2033 disposed in the second mounting groove 2021, and a fourth guide hole 2212 for sliding engagement with the fourth guide post 2033 is provided at the third mating block 2031. Therefore, the moving direction of the third mating block 2031 is better guided, thereby improving the stability of the third mating block 2031 during movement.

[0192] Specifically, the vacuum pumping device has the following steps when in use:

[0193] Step 1: When performing the vacuuming process, the worker inserts the open end of the food bag into the space between the upper vacuum tank 241 and the lower vacuum tank 242, and then closes the top cover 110.

[0194] Step 2: The operator drives the lead screw 2032 to rotate via the motor 2034, which in turn moves the third mating block 2031. As the third mating block 2031 moves, its ninth guide slope 2035 presses against the eighth guide slope 2111, causing the first mating strip 2110 and the lower vacuum component 243 to move upwards synchronously until the lower vacuum component 243 and the upper vacuum component 240 clamp the end of the food bag. At this point, the upper vacuum groove 241, the lower vacuum groove 242, and the inside of the food bag form a sealed space.

[0195] Step 3: The staff uses the air in the sealed space to achieve the vacuuming process of the food bag.

[0196] Step 4: After vacuuming is completed, the operator drives the lead screw 2032 to rotate via motor 2034, which in turn moves the third mating block 2031. When the third mating block 2031 moves, its ninth guide slope 2035 presses against the eighth guide slope 2111, causing the first mating strip 2110 and the lower vacuum component 243 to move down synchronously. The lower vacuum component 243 retracts into the second mounting groove 2021.

[0197] In this embodiment, the sealing device includes a heat-sealing strip 250 disposed at the lower end face of the upper cover 110 and the upper end face of the lower cover 120, which seals the food bag. Therefore, the sealing of the food bag can be achieved better.

[0198] The heat sealing strip 250 can be a conventional heat sealing strip, and the principle and technology of the heat sealing strip 250 for sealing food bags adopt existing technology.

[0199] It is readily understood that those skilled in the art can combine, split, or reorganize the embodiments provided in this application to obtain other embodiments, all of which do not exceed the protection scope of this application.

[0200] The present invention and its embodiments have been described above illustratively. This description is not restrictive, and the embodiments shown are only part of the embodiments of the present invention. The actual structure is not limited thereto. Therefore, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the spirit of the present invention, they should all fall within the protection scope of the present invention.

Claims

1. A food bag sealing machine, comprising a sealing machine body (100), the sealing machine body (100) including an upper cover (110) and a lower cover (120) hinged to each other, and a storage device disposed sequentially from front to back along the width direction of the sealing machine body (100) at the inner end face of the upper cover (110) and the lower cover (120), characterized in that: The storage device includes a spool (210), a clamping mechanism disposed at both ends of the spool (210), and a pressing mechanism. The clamping mechanism includes a third housing (263) for cooperating with the lower cover of the food bag sealing machine and having a first rotating cavity (1210), and a first rotating member (1220), a second rotating member (1230), and a third sliding member (1240) coaxially disposed in the first rotating cavity (1210). The first rotating member (1220) is used to fixally cooperate with both ends of the spool (210) of the food bag sealing machine. It also includes a first elastic element, a second elastic element, a third elastic element, and a pressing element (211); The first elastic member is used to drive the third sliding member (1240) to move toward the second rotating member (1230) so that the end face of the third sliding member (1240) is pressed against the end face of the second rotating member (1230); the second elastic member is used to drive the second rotating member (1230) to move toward the first rotating member (1220) so that the end face of the second rotating member (1230) is pressed against the end face of the first rotating member (1220); the third elastic member is used to drive the second rotating member (1230) to rotate in the opposite direction; the side wall of the third sliding member (1240) is provided with a fitting member (1241) for sliding cooperation with the pressing member (211), and the pressing member (211) is used to drive the third sliding member (1240) to move away from the second rotating member (1230) through the fitting member (1241) under the pressing action; The first rotating member (1220) and the second rotating member (1230) are respectively provided with a first engaging part and a second engaging part for engaging with each other at their opposite ends. The first engaging part and the second engaging part are used to restrict the first rotating member (1220) from rotating in the forward direction relative to the second rotating member (1230) when the first rotating member (1220) and the second rotating member (1230) are pressed together. The second rotating member (1230) and the third sliding member (1240) are respectively provided with a third engaging part and a fourth engaging part for engaging with each other at their opposite ends. The third engaging part and the fourth engaging part are used to restrict the second rotating member (1230) from rotating in the reverse direction when the second rotating member (1230) and the third sliding member (1240) are pressed together. The pressing mechanism includes a first pressure roller (1111) and a second pressure roller (1112). A first hole is formed between the first pressure roller (1111) and the second pressure roller (1112) for the food bag to pass through. The food bag is used to drive the first pressure roller (1111) and the second pressure roller (1112) to rotate when moving. The first pressure roller (1111) and the second pressure roller (1112) are used to restrict the movement of the food bag when stationary. It also includes limiting units located at both ends of the first pressure roller (1111) for limiting the rotation of the first pressure roller (1111), the first pressure roller (1111) for limiting the movement of the food bag when stationary; It also includes a fourth housing (264) for cooperating with the lower cover (120) of the food bag sealing machine. The fourth housing (264) is provided with a fourth mounting cavity for installing the limiting unit. The fourth mounting cavity includes a second rotating groove (1811) communicating with the third storage groove (2011) and a first closing cavity (1812) communicating with the second rotating groove (1811). The limiting unit includes a third rotating member (1410), a fourth rotating member (1420), and a fifth rotating member (1630) arranged coaxially along the axial direction of the roll (210); the first pressure roller (1111) is located at the third storage groove (2011), the third rotating member (1410) is fixedly located at the end of the second pressure roller (1112), the third rotating member (1410) is rotatably engaged with the second rotating groove (1811), and the fourth rotating member (1420) and the fifth rotating member (1630) are located at the first closing cavity (1812); The first cavity (1812) is also provided with a first driven member (1441) and a second driven member (1442) arranged coaxially, and a driven shaft (1440) for mounting the first driven member (1441) and the second driven member (1442); the third rotating member (1410) drives the first driven member (1441) to rotate so that the fourth rotating member (1420) rotates synchronously with the first driven member (1441), and the fourth rotating member (1420) drives the second driven member (1442) to rotate so that the fifth rotating member (1630) rotates synchronously with the second driven member (1442); The fifth rotating member (1630) has a first stop (1711) on its outer peripheral wall, and a second locking part is provided in the first cavity (1812). The second locking part includes the second stop (1712). The first pressure roller (1111) is used to stop rotating when the fifth rotating member (1630) rotates to the point where the second stop (1712) abuts against the first stop (1711). The fourth rotating member (1420) has a plurality of third locking grooves (1510) spaced along its circumference on its outer peripheral wall, and the first engagement cavity (1812) has a third locking part (1520) for cooperating with the third locking grooves (1510) to restrict the reverse rotation of the fourth rotating member (1420).

2. The food bag sealing machine according to claim 1, characterized in that: The first engaging portion includes a plurality of first engaging teeth (1221) spaced apart circumferentially on the end face of the first rotating member (1220), and the second engaging portion includes a plurality of second engaging teeth (1232) spaced apart circumferentially on the end face of the second rotating member (1230). The first engaging teeth (1221) are used to engage with the second engaging teeth (1232). The first engaging teeth (1221) include a third spiral inclined surface (1222) and a first locking surface (1223) continuously arranged. The second engaging teeth (1232) include a fourth spiral inclined surface (1233) and a second locking surface (1234) continuously arranged. The third spiral inclined surface (1222) and the fourth spiral inclined surface (1233) are slidably engaged. The first locking surface (1223) and the second locking surface (1234) cooperate with each other to restrict the first rotating member (1220) from rotating forward relative to the second rotating member (1230).

3. The food bag sealing machine according to claim 1, characterized in that: The third engaging portion includes a plurality of third engaging teeth (1235) spaced apart circumferentially on the end face of the second rotating member (1230), and the fourth engaging portion includes a plurality of fourth engaging teeth (1244) spaced apart circumferentially on the end face of the third sliding member (1240). The third engaging teeth (1235) are used to engage with the fourth engaging teeth (1244). The third engaging teeth (1235) include a fifth spiral inclined surface (1236) and a third locking surface (1237) arranged continuously. The fourth engaging teeth (1244) include a sixth spiral inclined surface (1245) and a fourth locking surface (1246) arranged continuously. The fifth spiral inclined surface (1236) and the sixth spiral inclined surface (1245) are slidably engaged, and the third locking surface (1237) and the fourth locking surface (1246) cooperate with each other to restrict the second rotating member (1230) from rotating in the opposite direction relative to the third sliding member (1240).

4. A food bag sealing machine according to claim 1, characterized in that: The third sliding member (1240) is provided with a first through hole (1321) that passes through the third sliding member (1240) along the axis of the scroll (210). The inner wall of the middle part of the first through hole (1321) expands radially toward the axis of the first through hole (1321) to form a second flange (1322). The side wall of the first rotating cavity (1210) is provided with a first guide post (1351) that extends toward the scroll (210). The first guide post (1351) slides in cooperation with the inner wall of the second flange (1322). The second rotating component (1230) is provided with a second through hole (1341) that passes through the second rotating component (1230) along the axial direction of the scroll (210). The inner wall of the middle part of the second through hole (1341) is provided with a second connecting plate (1342). The end face of the second connecting plate (1342) facing the second flange (1322) is provided with a second guide post (1345) that is parallel to the axial direction of the scroll (210). The end face of the second guide post (1345) facing the second flange (1322) is provided with a first guide groove (1343) for sliding cooperation with the first guide post (1351). The first guide post (1351) and the first guide groove (1343) are rotatably engaged. The second connecting plate (1342) has a third guide post (1334) axially arranged parallel to the scroll (210) at the end face facing away from the second flange (1322). The first rotating member (1220) has a first mounting groove (1331) at the end facing the second rotating member (1230). The bottom surface of the first mounting groove (1331) has a second guide groove (1332) for sliding cooperation with the third guide post (1334). The third guide post (1334) and the second guide groove (1332) are rotatably cooperated.

5. A food bag sealing machine according to claim 4, characterized in that: The third housing (263) has a sixth opening groove (1352) that connects to the first rotating cavity (1210) and a sealing member (1251) for sealing the sixth opening groove (1352) at its outer end face; one end of the first guide post (1351) is fixedly disposed at the end face of the sealing member (1251).

6. A food bag sealing machine according to claim 4, characterized in that: The first elastic element includes a fourth compression spring (1352) sleeved on the first guide post (1351), and a sealing element (1353) and a second flange (1322) are used to limit the two ends of the fourth compression spring (1352); The second elastic element includes a first tension spring (1345) sleeved on the third guide post (1334), and a first rotating element (1333) for rotating along the axis of the scroll (210) is provided at the bottom wall of the first mounting groove (1331). The two ends of the first tension spring (1345) are respectively fixed at the first rotating element (1333) and the second connecting plate (1342). The third elastic element includes a spring (1231) with its two ends fixed at the outer wall of the second rotating element (1230) and the inner wall of the first rotating cavity (1210), respectively.

7. A food bag sealing machine according to claim 1, characterized in that: The upper end face of the third housing (263) is provided with a fifth opening groove (1361) that connects to the first rotating cavity (1210), and the pressing member (211) is provided at the fifth opening groove (1361); the upper end face of the mating member (1241) forms a fifth guide slope (1242), and the lower end face of the pressing member (211) is used to squeeze the fifth guide slope (1242) when moving downward so as to realize the movement of the third sliding member (1240) away from the second rotating member (1230).

8. A food bag sealing machine according to claim 7, characterized in that: The first rotating cavity (1210) has a sixth limiting groove (1212) on its side wall for sliding engagement with the mating part (1241).

9. A food bag sealing machine according to claim 8, characterized in that: A third stepped surface (1213) is formed between the fifth opening groove (1361) and the sixth limiting groove (1212). A first flange (1243) is provided on the side wall of the mating part (1241). The first flange (1243) is used to cooperate with the third stepped surface (1213) to restrict the mating part (1241) from disengaging from the fifth opening groove (1361).

Images