A toothed suction cup

Abstract

The present invention discloses a toothed suction cup, comprising an outer shell, a connecting joint, and an inner turntable, wherein the connecting joint is connected to the outer shell, the outer shell is connected to a cylinder, the inner turntable is installed in the outer shell via a bearing, the cylinder is connected to the inner turntable via a steering mechanism, the bottom end of the inner turntable is provided with inner teeth, the bottom end of the outer shell is provided with outer teeth, the outer shell is sleeved with a suction cup, the connecting joint is provided with an air duct, and the inner turntable is provided with an air duct to connect the air duct with the interior of the inner turntable. The present invention has a reasonable design and is suitable for grabbing woven bags with warp and weft lines and good air permeability. An external negative pressure device maintains a certain negative pressure between the suction cup and the bag through the air duct, the outer teeth press the woven bag so that it does not move, and the cylinder drives the inner teeth of the inner turntable to rotate relative to the outer shell via the steering mechanism, so that the inner teeth grab the warp and weft lines of the bag, destroying the vacuum between the suction cup and the lower bag, ensuring that the suction cup can only grab the bag of the upper layer at a time, and the inner and outer teeth grab the woven bag at the same time, so that the woven bag is not easy to fall off.

Description

Technical Field

[0001] The present invention relates to the technical field of material packaging equipment, and more particularly to a toothed suction cup. Background Art

[0002] In the fully automatic production line for packaging materials in packaging bags, rubber suction cups are needed in multiple processes. For example, suction cups are needed to grab the packaging bags during the bag-taking process, and suction cups are needed to hold the two sides of the packaging bags to open them during the bag-opening process.

[0003] The current suction cups have some defects that have been found after use, mainly manifested in the following aspects: First, for some woven bags with warp and weft lines and good air permeability, due to their good air permeability, when using the suction cup to suck the bags, two or more bags will usually be sucked up; second, after the suction cup sucks the packaging bag, because some bags have good air permeability and the bag's own gravity, the grip is not firm and there is a risk of falling off. Summary of the Invention

[0004] In order to solve the above problems, the present invention provides a toothed suction cup, which can ensure that one packaging bag is sucked up each time and is not easy to fall off after being sucked up.

[0005] According to one aspect of the present invention, a toothed suction cup is provided, comprising an outer shell, a connecting joint, and an inner turntable, wherein the connecting joint is connected to the top of the outer shell, a cylinder is connected to the side wall of the outer shell, the inner turntable is mounted in the outer shell via a bearing, the cylinder is connected to the inner turntable via a steering mechanism to drive the inner turntable to rotate relative to the outer shell, the bottom end of the inner turntable is provided with internal teeth, the outer side of the outer shell is covered with a suction cup, the connecting joint is provided with an air duct, and the inner turntable is provided with an air hole to connect the air duct with the interior of the inner turntable. Thus, the bottom of the toothed suction cup is pressed against a woven bag, the connecting joint is externally connected to a negative pressure device, and a certain negative pressure is maintained between the suction cup and the bag via the air duct of the connecting joint, the cylinder drives the inner turntable to rotate relative to the outer shell via the steering mechanism, the outer shell and the suction cup are stationary, the inner teeth at the bottom end of the inner turntable rotate, and the inner teeth move relative to the outer shell, causing the inner teeth to grasp the warp and weft of the bag, thereby breaking the vacuum between the suction cup and the lower bag, and ensuring that the suction cup can only grab the upper bag at a time.

[0006] In some embodiments, the steering mechanism includes a drive arm, a crank, and a connecting rod. One end of the drive arm is connected to the piston rod of the cylinder, and the other end of the drive arm is connected to the connecting rod. The lower end of the connecting rod is connected to one end of the crank, which is fixedly connected to the upper end of the inner turntable. The cylinder acts on the drive arm to drive the connecting rod, which in turn causes the crank to rotate about the inner turntable. Thus, the piston rod of the cylinder extends and contracts, causing the drive arm to displace. The drive arm, via the connecting rod, drives the crank to swing about the inner turntable. As the crank swings, the inner turntable rotates, thereby causing the inner teeth to rotate relative to the outer shell. The steering mechanism driving the inner turntable is sophisticated; only a slight rotation of the crank required for the inner turntable to cause the inner teeth to grip the warp and weft of the bag, thereby breaking the vacuum between the suction cup and the bag below.

[0007] In some embodiments, the bottom end of the outer shell is provided with external teeth that protrude outward from the outer shell. Thus, when the bottom of the toothed suction cup is pressed against the woven bag, the external teeth press against the surface of the woven bag. When the inner turntable rotates, the external teeth firmly compress the woven bag. When the inner teeth move, both the inner and outer teeth simultaneously grip the woven bag, ensuring a secure grip and reducing the chance of the bag falling out after suction.

[0008] In some embodiments, the outer wall of the outer shell is provided with an inwardly recessed mounting groove, and the suction cup is mounted in the mounting groove. Therefore, the suction cup is generally made of soft rubber material and is a consumable part. The suction cup is positioned and installed in the mounting groove, which is very convenient and easy to maintain and replace later.

[0009] In some embodiments, the inner turntable comprises a main shaft portion and a turntable portion. The outer diameter of the turntable portion is larger than that of the main shaft portion, forming a stepped shape. Multiple vents are provided and evenly distributed on the top of the turntable portion. Thus, the outer diameter of the turntable portion is larger than that of the main shaft portion, ensuring that the diameter of the end surface where the internal teeth are located is as large as possible, allowing for the maximum distribution of the internal teeth, allowing them to grip the warp and weft of the bag while simultaneously breaking the vacuum between the suction cup and the underlying bag.

[0010] In some embodiments, a gap is provided between the top of the turntable portion and the outer sidewall of the turntable portion and the inner sidewall of the outer shell. Thus, when the inner turntable rotates, the turntable portion does not contact the inner sidewall of the outer shell, thereby preventing friction between the inner turntable and the outer shell and extending the service life of the device.

[0011] In some embodiments, a first support portion is provided on the outer sidewall of the main shaft, and a second support portion is provided on the inner sidewall of the outer shell. The first and second support portions are located on the same horizontal plane. The inner and outer rings of the bearing are located on the first and second support portions, respectively. A retaining ring is provided on the upper end surface of the bearing. This facilitates assembly of the bearing with the inner turntable and the outer shell.

[0012] In some embodiments, the bearing is a seal-less bearing.

[0013] In some embodiments, the outer shell, the connecting joint, the inner rotating disk and the suction cup are on the same central axis. Thus, during assembly, there is no need to pay attention to the installation angles of the various components, making assembly more convenient.

[0014] Compared with the prior art, the beneficial effects of the present invention are: the toothed suction cup provided by the present invention is reasonably designed, suitable for grabbing woven bags with warp and weft lines and good air permeability, ensuring that one bag is sucked up each time. During operation, the bottom of the toothed suction cup is pressed onto the woven bag, and the external negative pressure device maintains a certain negative pressure between the suction cup and the bag through the air duct of the connecting joint. The outer teeth of the outer shell firmly press the woven bag and do not move. The piston rod of the cylinder is extended and retracted to cause the driving arm to displace. The driving arm drives the crank to swing with the inner turntable as the center through the connecting rod. As the crank swings, the inner turntable rotates relative to the outer shell, so that the inner teeth grasp the warp and weft lines of the bag, destroying the vacuum between the suction cup and the lower bag, ensuring that the suction cup can only grab the bag of the upper layer at a time, and the woven bag is grabbed at the same time by the outer teeth and the inner teeth. After grabbing, the woven bag is not easy to fall off. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of an embodiment of a toothed suction cup of the present invention;

[0016] Figure 2 It is a three-dimensional schematic diagram of the assembly of various components of a toothed suction cup of the present invention;

[0017] Figure 3 It is a three-dimensional schematic diagram of a toothed suction cup of the present invention;

[0018] Figure 4 yes Figure 3 Schematic diagram of the internal structure. DETAILED DESCRIPTION

[0019] The present invention will be further described below in conjunction with specific embodiments.

[0020] like Figure 1 and 3As shown, a toothed suction cup according to one embodiment of the present invention includes an outer shell 1, a connecting joint 2 and an inner turntable 3. The connecting joint 2 is connected to the top of the outer shell 1 by a thread. The side wall of the outer shell 1 is provided with a cylinder 4 by bolts. The inner turntable 3 is installed in the outer shell 1 through a bearing 5. The cylinder 4 is connected to the inner turntable 3 through a steering mechanism 6 to drive the inner turntable 3 to rotate relative to the outer shell 1. The bottom end of the inner turntable 3 is provided with internal teeth 301, and the outer side of the outer shell 1 is provided with a suction cup 7. An air duct 21 is provided through the connecting joint 2, and the connecting joint 2 is used for external negative pressure equipment (not shown in the figure). The inner turntable 3 is provided with an air vent 302 to connect the air duct 21 with the inside of the inner turntable 3. During operation, the bottom of the toothed suction cup is pressed onto the woven bag, and the connecting joint 2 is externally connected to the negative pressure equipment. A certain negative pressure is maintained between the suction cup 7 and the bag through the air duct 21 of the connecting joint 2. The cylinder 4 drives the inner turntable 3 to rotate relative to the outer shell 1 through the steering mechanism 6. The outer shell 1 and the suction cup 7 remain stationary, and the inner teeth 301 at the bottom end of the inner turntable 3 rotate. The inner teeth 301 move relative to the outer shell 1, so that the inner teeth 301 grasp the warp and weft of the bag, destroying the vacuum between the suction cup 7 and the lower bag, ensuring that the suction cup 7 can only grab the bag of the upper layer at a time.

[0021] like Figure 2 and 4 As shown, the steering mechanism 6 includes a driving arm 61, a crank 62 and a connecting rod 63. The driving arm 61 adopts an arc-shaped structure. One end of the driving arm 61 is connected to the piston rod 41 of the cylinder 4, and the other end of the driving arm 61 is provided with a slot 611. The upper end of the connecting rod 63 is engaged with the slot 611. The lower end of the connecting rod 63 is fixedly connected to one end of the crank 62, and the crank 62 is sleeved and fixedly connected to the upper end of the inner turntable 3. The cylinder 4 acts on the driving arm 61 to drive the connecting rod 63 to drive the crank 62 to rotate around the inner turntable 3. Specifically, the piston rod 41 of the cylinder 4 is extended and retracted to cause the driving arm 61 to displace, and the driving arm 61 drives the crank 62 to swing around the inner turntable 3 through the connecting rod 63. As the crank 62 swings, the inner turntable 3 rotates, that is, the inner teeth 301 rotate relative to the outer shell 1. The steering mechanism 6 driving the inner turntable 3 is precise, and only the crank 62 is required to drive the inner turntable 3 to rotate slightly, and the rotation angle of the crank 62 is 5 to 20 degrees. After the inner teeth 301 rotate, the warp and weft of the bag are tightened, destroying the vacuum between the suction cup 7 and the lower bag.

[0022] like Figure 1As shown, the bottom end of the outer shell 1 is provided with outer teeth 101, and the outer teeth 101 protrude toward the outside of the outer shell 1. The lower part of the outer wall of the outer shell 1 is provided with an inwardly recessed mounting groove 102, and the suction cup 7 is sleeved in the mounting groove 102. When the bottom of the toothed suction cup is pressed onto the woven bag, the outer teeth 101 press against the surface of the woven bag. When the inner turntable 3 rotates, the outer teeth 101 play a role in firmly pressing the woven bag. When the position of the inner teeth 301 moves, the inner teeth 301 and the outer teeth 101 simultaneously grasp the woven bag, which can ensure that the woven bag is firmly grasped and reduce the chance of the bag falling off after being sucked. The suction cup 7 is generally made of soft rubber material and is a wearing part. The suction cup 7 is positioned and installed through the mounting groove 102, which is very convenient and easy to maintain and replace later.

[0023] like Figure 2 As shown, the inner turntable 3 includes 31 and a turntable portion 32. The outer diameter of the turntable portion 32 is larger than the outer diameter of 31 to form a step-like shape. A plurality of vents 302 are provided and evenly distributed on the top of the turntable portion 32. A gap 10 is provided between the top of the turntable portion 32 and the outer wall of the turntable portion 32 and the inner wall of the outer shell 1. The outer diameter of the turntable portion 32 is larger than the outer diameter of 31, and the diameter of the end face where the inner teeth 301 are located is as large as possible so that the inner teeth 301 are distributed as much as possible and can grasp the warp and weft of the bag. When the inner turntable 3 rotates, the turntable portion 32 will not contact the inner wall of the outer shell 1, avoiding friction between the inner turntable 3 and the outer shell 1, thereby extending the service life of the equipment.

[0024] like Figure 4 As shown, the outer wall of housing 31 is provided with a first support portion 311, and the inner wall of outer housing 1 is provided with a second support portion 11. The first and second support portions 311 and 11 are located on the same horizontal plane. Bearing 5 utilizes a ringless bearing, with its inner and outer rings resting on the first and second support portions 311 and 11, respectively. A retaining ring 8 is provided on the upper end face of bearing 5. Outer housing 1, connecting joint 2, inner turntable 3, suction cup 7, and bearing 5 are all aligned on the same central axis. During assembly, there is no need to pay attention to the installation angles of the various components, making assembly more convenient.

[0025] The toothed suction cup provided by the present invention is rationally designed and suitable for grabbing woven bags with warp and weft threads and good air permeability, ensuring that one bag is sucked up at a time. During operation, the bottom of the toothed suction cup is pressed against the woven bag, and the external negative pressure device maintains a certain negative pressure between the suction cup 7 and the bag through the air duct 21 of the connecting joint 2, so that the outer teeth 101 of the outer shell 1 firmly press the woven bag so that it does not move; the piston rod 41 of the cylinder 4 is extended and retracted to cause the driving arm 61 to displace, and the driving arm 61 drives the crank 62 to swing around the inner turntable 3 through the connecting rod 63. As the crank 62 swings, the inner turntable 3 rotates relative to the outer shell 1, so that the inner teeth 301 can grasp the warp and weft threads of the bag, destroying the vacuum between the suction cup 7 and the lower bag, ensuring that the suction cup 7 can only grab the bag of the upper layer at a time, and the woven bag is grabbed simultaneously by the outer teeth 101 and the inner teeth 301. After grabbing, the woven bag is not easy to fall off.

[0026] The above are only some embodiments of the present invention. It should be pointed out that for ordinary technicians in this field, other variations and improvements can be made without departing from the creative concept of the present invention, and these all fall within the scope of protection of the present invention.

Claims

1. A toothed suction cup, characterized in that: The invention comprises an outer shell (1), a connecting joint (2) and an inner turntable (3), wherein the connecting joint (2) is connected to the top of the outer shell (1), a cylinder (4) is connected to the side wall of the outer shell (1), the inner turntable (3) is installed in the outer shell (1) through a bearing (5), the cylinder (4) is connected to the inner turntable (3) through a steering mechanism (6) to drive the inner turntable (3) to rotate relative to the outer shell (1), the bottom end of the inner turntable (3) is provided with an inner tooth (301), and the outer shell (1) The bottom end of the outer shell (1) is provided with an outer tooth (101), the outer tooth (101) protrudes toward the outside of the outer shell (1), the lower part of the outer wall of the outer shell (1) is provided with an inwardly recessed mounting groove (102), the mounting groove (102) of the outer shell (1) is sleeved with a suction cup (7), the connecting joint (2) is provided with an air duct (21), the inner turntable (3) is provided with an air hole (302) so that the air duct (21) is communicated with the inside of the inner turntable (3), and the connecting joint (2) is used for externally connecting to a negative pressure device; The bottom of the toothed suction cup is pressed onto the woven bag, and the connecting joint (2) is externally connected to the negative pressure device. The air duct (21) of the connecting joint (2) maintains negative pressure between the suction cup (7) and the bag. The cylinder (4) drives the inner turntable (3) to rotate relative to the outer shell (1) through the steering mechanism (6). The outer shell (1) and the suction cup (7) remain stationary. The inner teeth (301) at the bottom end of the inner turntable (3) rotate, and the inner teeth (301) move relative to the outer shell (1), so that the inner teeth (301) grasp the longitude and latitude of the bag, destroying the vacuum between the suction cup (7) and the lower bag, ensuring that the suction cup (7) can only grab the bag of the upper layer at a time.

2. The toothed suction cup according to claim 1, characterized in that The steering mechanism (6) includes a driving arm (61), a crank (62) and a connecting rod (63), one end of the driving arm (61) is connected to the piston rod of the cylinder (4), the other end of the driving arm (61) is connected to the connecting rod (63), the lower end of the connecting rod (63) is connected to one end of the crank (62), and the crank (62) is fixedly connected to the upper end of the inner turntable (3). The cylinder (4) acts on the driving arm (61) to drive the connecting rod (63) to drive the crank (62) to rotate around the inner turntable (3).

3. The toothed suction cup according to claim 2, wherein: The inner turntable (3) comprises a main shaft portion (31) and a turntable portion (32); the outer diameter of the turntable portion (32) is larger than the outer diameter of the main shaft portion (31) to form a step shape; a plurality of vent holes (302) are provided and are evenly distributed on the top of the turntable portion (31).

4. The toothed suction cup according to claim 3, wherein: A gap (10) is provided between the top of the turntable portion (31) and the outer side wall of the turntable portion (31) and the inner side wall of the outer shell (1).

5. The toothed suction cup according to claim 4, characterized in that The outer side wall of the main shaft portion (31) is provided with a first supporting portion (311), and the inner side wall of the outer shell (1) is provided with a second supporting portion (11). The first supporting portion (311) and the second supporting portion (11) are located on the same horizontal plane. The inner and outer rings of the bearing (5) are located on the first supporting portion (311) and the second supporting portion (11), respectively. A retaining ring (8) is provided on the upper end surface of the bearing (5).

6. The toothed suction cup according to claim 5, characterized in that The bearing (5) is a bearing without a sealing ring.

7. The toothed suction cup according to claim 1, wherein: The outer shell (1), the connecting joint (2), the inner rotating disk (3) and the suction cup (7) are located on the same central axis.

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