Bag opening structure

Abstract

The utility model belongs to the technical field of packaging mechanical equipment, and relates to a bag opening structure which comprises two opening-opening polished shaft seats arranged in parallel, a lead screw is arranged between the two opening-opening polished shaft seats in a rotating and supporting mode, and the two sides of the lead screw in the length direction are each connected with an opening-opening device in a threaded fit mode. The two opening supporting devices are close to or far away from each other; the two sides of the lead screw are each provided with an opening supporting optical axis, and the opening supporting device is guided and supported through the opening supporting optical axes. The opening expanding device comprises an opening expanding support, a four-connecting-rod assembly and a bag expanding air cylinder are installed on an outer end rod of the opening expanding support, the bag expanding air cylinder drives the four-connecting-rod assembly, and a supporting rod capable of being adjusted in a lifting mode is installed at the tail end of an execution part of a fourth connecting rod of the four-connecting-rod assembly. The bag opening structure can be suitable for bags with various heights and is wide in application range.

Description

Technical Field

[0001] This utility model belongs to the technical field of packaging machinery and equipment, and relates to a bag-supporting structure. Background Technology

[0002] In the bagging and packaging of powders, granules, etc., it is necessary to open the bag and then fill it with materials. Currently, the bag-opening structures in existing technologies are only suitable for bags of a certain height, which limits their application. Summary of the Invention

[0003] To address the aforementioned problems, this utility model provides a bag support structure that is suitable for pockets of various heights and has a wide range of applications.

[0004] According to the technical solution of this utility model: a bag support structure, characterized in that: it includes two mutually parallel support optical shaft seats, a screw rod is rotatably supported between the two support optical shaft seats, and a support device is threadedly connected to both sides of the screw rod along its length direction. When the screw rod rotates, the two support devices move closer to or further away from each other.

[0005] A support optical shaft is provided on each side of the lead screw, and the support device is guided and supported by the support optical shaft;

[0006] The mouth support device includes a mouth support bracket, a four-bar linkage assembly and a bag-supporting cylinder are mounted on the outer end rod of the mouth support bracket, the bag-supporting cylinder drives the four-bar linkage assembly, and an adjustable support rod is mounted at the end of the actuator of the fourth link of the four-bar linkage assembly.

[0007] As a further improvement of this utility model, one axial end of the lead screw extends from the corresponding support shaft seat and is fixedly connected to the handwheel.

[0008] As a further improvement of this utility model, the support device is connected by a screw nut and a screw thread.

[0009] As a further improvement of this utility model, the two ends of the lead screw are respectively rotatably supported on the corresponding support shaft seat by bearing seats.

[0010] As a further improvement of this utility model, the four-bar linkage includes a first link, a second link, a third link, and a fourth link. The upper end of the first link is fixedly connected to the lower end of the outer end rod of the support bracket. The upper end of the second link is rotatably connected to the middle part of the first link. The lower end of the first link is rotatably connected to one end of the third link. One end of the fourth link is rotatably connected to one end of the second link. The other end of the fourth link is rotatably connected to the other end of the third link.

[0011] The upper end of the bag-supporting cylinder is rotatably connected to the upper part of the outer end rod of the bag-supporting bracket, and the piston rod of the bag-supporting cylinder is hinged to the middle part of the second connecting rod.

[0012] The actuator end of the fourth link has a through-hole, and the strut is set in the through-hole and can be locked and positioned.

[0013] As a further improvement of this utility model, the threads on both sides of the lead screw in the length direction are rotated in opposite directions.

[0014] The technical advantages of this invention are as follows: The product has a reasonable and ingenious structure, addressing the limitation of existing bag-opening structures that are only suitable for pockets of specific heights. This invention uses a cylinder to drive the actuator of a four-bar linkage assembly for lifting and lowering, thereby raising and lowering the support rod. This allows it to be used for opening pockets of various heights, thus broadening its applicability. Attached Figure Description

[0015] Figure 1 This is the front view of the present invention.

[0016] Figure 2 This is the left view of the present invention.

[0017] Figure 3 This is a perspective view of the present invention. Detailed Implementation

[0018] The specific embodiments of this utility model will be further described below with reference to the accompanying drawings.

[0019] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. The described embodiments are merely some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention.

[0020] Figure 1-3 The components include: a support shaft seat 1, a support shaft 2, a lead screw 3, a handwheel 4, a support device 5, a first connecting rod 5-1, a second connecting rod 5-2, a third connecting rod 5-3, a fourth connecting rod 5-4, a bag-supporting cylinder 5-5, a support rod 5-6, a support bracket 5-7, a lead screw bearing seat 6, and a lead screw nut 7.

[0021] like Figure 1-3As shown, this utility model is a bag support structure, including two parallel support shaft seats 1. A screw rod 3 is rotatably supported between the two support shaft seats 1. The screw rod 3 is rotatably supported on the support shaft seat 1 through a screw rod bearing seat 6. A support device 5 is threadedly connected to each side of the screw rod 3 along its length. When the screw rod 3 rotates, the two support devices 5 move closer to or further away from each other.

[0022] like Figure 3 As shown, a support optical shaft 2 is provided on each side of the lead screw 3. The support device 5 is guided and supported by the support optical shaft 2, thereby ensuring that the support device 5 can move left and right smoothly and reliably.

[0023] The mouth-supporting device 5 includes a mouth-supporting bracket 5-7. A four-bar linkage assembly and a bag-supporting cylinder 5-5 are mounted on the outer end rod of the mouth-supporting bracket 5-7. The bag-supporting cylinder 5-5 drives the four-bar linkage assembly. An adjustable support rod 5-6 is installed at the end of the actuator of the fourth link 5-4 of the four-bar linkage assembly. The adjustment of the support rod 5-6 is achieved by: a mounting hole penetrating the end of the actuator of the fourth link 5-4; the support rod 5-6 is disposed in the mounting hole and can be locked and positioned. Since the actuator of the fourth link 5-4 has a groove communicating with the mounting hole, the groove includes a first groove parallel to the length direction of the actuator and a second groove perpendicular to the first groove and extending to the end face of the actuator. At the same time, an adjustment hole is also penetrating the actuator of the fourth link 5-4, and an adjustment bolt is threaded into the adjustment hole to limit and fix the support rod 5-6 by compressing the spacing of the first groove.

[0024] One axial end of the lead screw 3 extends from the corresponding support shaft seat 1 and is fixedly connected to the handwheel 4. During operation, the handwheel 4 is rotated according to the specifications of the bag to adjust the distance between the two support devices 5 to a suitable position.

[0025] Furthermore, the support device 5 is connected to the lead screw 3 via a screw nut 7.

[0026] Both ends of the lead screw 3 are rotatably supported on the corresponding support shaft seat 1 via bearing seats 6.

[0027] The four-bar linkage includes a first link 5-1, a second link 5-2, a third link 5-3, and a fourth link 5-4. The upper end of the first link 5-1 is fixedly connected to the lower end of the outer end rod of the support bracket 5-7. The upper end of the second link 5-2 is rotatably connected to the middle of the first link 5-1. The lower end of the first link 5-1 is rotatably connected to one end of the third link 5-3. One end of the fourth link 5-4 is rotatably connected to one end of the second link 5-2, and the other end of the fourth link 5-4 is rotatably connected to the other end of the third link 5-3. Figure 3As shown, the fourth link 5-4 is approximately right-angled. The actuator of the fourth link 5-4 is located at the outer end of one of the right-angled sides. The outer end of the other right-angled side is hinged to the lower end of the second link 5-2. The right-angled vertex of the fourth link 5-4 is rotatably connected to the third link 5-3.

[0028] The upper end of the bag-supporting cylinder 5-5 is rotatably connected to the upper part of the outer end rod of the bag-supporting bracket 5-7, and the piston rod of the bag-supporting cylinder 5-5 is hinged to the middle rod of the second connecting rod 5-2. For example... Figure 3 As shown, a cylinder seat is installed on the upper inner side of the outer end rod of the support bracket 5-7. The tail of the bag-supporting cylinder 5-5 is hinged to the cylinder seat. Specifically, two parallel ear plates are constructed on the cylinder seat, and the tail of the bag-supporting cylinder 5-5 is positioned between the two ear plates of the cylinder seat. The two ear plates guide the bag-supporting cylinder 5-5 during rotation. The first connecting rod 5-1 includes two parallel connecting rod plates, which are respectively placed on the two sides of the outer end rod of the support bracket 5-7.

[0029] It is understandable that the threads on both sides of the lead screw 3 along its length have opposite directions of rotation. At the same time, the screw nut 7, which is engaged with the two threads of the lead screw 3, has opposite directions of rotation. This allows the two support devices 5 to move closer or further apart when the lead screw 3 rotates.

[0030] Finally, it should be noted that the above specific embodiments are only used to illustrate the technical solution of this utility model and not to limit it. Although this utility model has been described in detail with reference to examples, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications and substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A bag support structure, characterized in that: It includes two parallel support optical shaft seats (1), and a screw rod (3) is rotatably supported between the two support optical shaft seats (1). A support device (5) is threadedly connected to both sides of the screw rod (3) along its length. When the screw rod (3) rotates, the two support devices (5) move closer to or further away from each other. A support shaft (2) is provided on each side of the lead screw (3), and the support device (5) is guided and supported by the support shaft (2). The mouth support device (5) includes a mouth support bracket (5-7), a four-bar linkage assembly and a bag-supporting cylinder (5-5) are installed on the outer end rod of the mouth support bracket (5-7), the bag-supporting cylinder (5-5) drives the four-bar linkage assembly, and an adjustable support rod (5-6) is installed at the end of the actuator of the fourth link (5-4) of the four-bar linkage assembly.

2. The bag support structure as described in claim 1, characterized in that: One axial end of the lead screw (3) extends from the corresponding support shaft seat (1) and is fixedly connected to the handwheel (4).

3. The bag support structure as described in claim 1, characterized in that: The support device (5) is connected to the screw (3) by a screw nut (7) threadedly.

4. The bag support structure as described in claim 1, characterized in that: The two ends of the lead screw (3) are rotatably supported on the corresponding support shaft seat (1) by bearing seats (6).

5. The bag support structure as described in claim 1, characterized in that: The four-bar linkage assembly includes a first link (5-1), a second link (5-2), a third link (5-3), and a fourth link (5-4). The upper end of the first link (5-1) is fixedly connected to the lower end of the outer end rod of the support bracket (5-7). The upper end of the second link (5-2) is rotatably connected to the middle of the first link (5-1). The lower end of the first link (5-1) is rotatably connected to one end of the third link (5-3). One end of the fourth link (5-4) is rotatably connected to one end of the second link (5-2). The other end of the fourth link (5-4) is rotatably connected to the other end of the third link (5-3). The upper end of the bag-supporting cylinder (5-5) is rotatably connected to the upper part of the outer end rod of the bag-supporting bracket (5-7), and the piston rod of the bag-supporting cylinder (5-5) is hinged to the middle rod of the second connecting rod (5-2). The actuator end of the fourth link (5-4) is provided with a through hole, and the support rod (5-6) is set in the mounting hole and can be locked and positioned.

6. The bag support structure as described in claim 1, characterized in that: The threads on the two sides of the lead screw (3) along the length direction are opposite.

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