Bag unfolding mechanism with buffering function
By using a buffered bag unfolding mechanism, which consists of a servo motor and a swing block, the problem of inconsistent bag unfolding in packaging machines is solved, achieving symmetrical bag unfolding and sealing, and improving production efficiency.
Patent Information
- Application Number
- CN202423201637.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-25
- Publication Date
- 2026-01-06
- Estimated Expiration
- 2034-12-25
AI Technical Summary
Existing packaging machines have problems with inconsistent bag unfolding at the bag unfolding station, which leads to sealing wrinkles and misalignment, especially in multi-station equipment for irregularly shaped bags.
The bag unfolding mechanism is equipped with a buffer, which consists of a servo motor, a reducer, a swing block, and a pull rod. Through the cooperation of the spring and the swing block, the bag unfolds in a central position and the force is adjusted to ensure consistent bag unfolding.
This achieves central symmetry in bag unfolding, reduces sealing offset and wrinkles, improves production efficiency, and saves equipment adjustment time.
Smart Images
Figure CN223764858U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of packaging machine technology, and in particular to a bag unfolding mechanism with cushioning. Background Technology
[0002] Currently, packaging machines are divided into single-station and multi-station types. The bag unfolding station is a crucial station affecting packaging quality, especially for multi-station machines handling irregularly shaped bags. Often, the bags unfold to varying degrees, resulting in wrinkles and uneven edges at the seal. Furthermore, the bags do not move outwards from the center at the start of unfolding, causing misalignment at the seal. Wrinkles, uneven edges, and misalignment are all unacceptable to customers. Therefore, we propose a bag unfolding mechanism with cushioning to solve these problems. Utility Model Content
[0003] The purpose of this invention is to address the shortcomings of existing technologies by proposing a cushioned bag unfolding mechanism.
[0004] To achieve the above objectives, the present invention adopts the following technical solution:
[0005] A buffered bag unfolding mechanism includes a servo motor, a reducer connected to one end of the servo motor, a fixed base mounted on the end of the reducer, a first swing block connected to the output end of the reducer, the first swing block being hinged to one end of a first pull rod, a second swing block hinged to the other end of the first pull rod, a second pull rod connected to the end of the second swing block via a rotating shaft, a connecting block fixedly connected above the second pull rod, a spring welded between the connecting block and the second pull rod, multiple sets of partitions sleeved on the surface of the rotating shaft, the connecting block being connected to a fixed base via a third swing block, a swing rod mounted on the end of the fixed base, an upper slider fixed base mounted below the swing rod, a lower slider fixed base mounted below the upper slider fixed base, and a front bag unfolding clamp and a rear bag unfolding clamp mounted on the surface of the lower slider fixed base.
[0006] Preferably, the end of the second swing block is adjusted with a shaft, and four small swing blocks are sleeved on the surface of the shaft. The small swing blocks are hinged to the bottom end of the second pull rod.
[0007] Preferably, a disc is fitted onto the upper surface of the second pull rod, one end of the spring is welded to the connecting block, and the other end of the spring is welded to the disc.
[0008] Preferably, the third pendulum block is provided in two groups, and each group is provided with four blocks, with the two groups of the third pendulum block being arranged symmetrically.
[0009] Preferably, the end of the pull rod is connected to the second swing block by bolts, and the interior of the second swing block has a through groove that matches the bolts.
[0010] Preferably, the small swing block is connected to the second pull rod by bolts, and the small swing block has a through groove inside that matches the bolt.
[0011] Preferably, the reducer is connected to the fixed base by screws, and screws are installed at all four corners of the reducer.
[0012] Compared with the prior art, the beneficial effects of this utility model are as follows:
[0013] The device features an upper and lower slider fixing seat arranged vertically, resulting in a compact structure that saves space. A buffer mechanism consisting of a second pull rod, spring, connecting block, and third swing block addresses the issue of varying bag unfolding strokes. Furthermore, the relative rotation of the connecting block and third swing block allows for bag unfolding from the center point outwards, accommodating more bag types without requiring equipment adjustments, thus reducing human intervention and improving production efficiency. Attached Figure Description
[0014] Figure 1 This is a front view schematic diagram of the structure of a bag unfolding mechanism with cushioning proposed in this utility model;
[0015] Figure 2 A three-dimensional structural diagram of a cushioned bag unfolding mechanism proposed in this utility model;
[0016] Figure 3 This is a three-dimensional schematic diagram of the fixed base and swing arm structure shown in the figure.
[0017] In the diagram: 1. Servo motor; 2. Reducer; 3. Fixed base; 4. First swing block; 5. First pull rod; 6. Second swing block; 7. Partition plate; 8. Second pull rod; 9. Spring; 10. Connecting block; 11. Third swing block; 12. Fixed base; 13. Swing rod; 14. Upper slider fixed base; 15. Lower slider fixed base; 16. Front opening bag clamp; 17. Rear opening bag clamp. Detailed Implementation
[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.
[0019] Reference Figure 1-3A buffered bag unfolding mechanism includes a servo motor 1, a reducer 2 connected to one end of the servo motor 1, a fixed base 3 mounted on one end of the reducer 2, a first swing block 4 connected to the output end of the reducer 2, the first swing block 4 being hinged to one end of a first pull rod 5, a second swing block 6 being hinged to the other end of the first pull rod 5, a second pull rod 8 connected to the end of the second swing block 6 via a rotating shaft, a connecting block 10 fixedly connected above the second pull rod 8, a spring 9 welded between the connecting block 10 and the second pull rod 8, multiple sets of partitions 7 sleeved on the surface of the rotating shaft, the connecting block 10 being connected to a fixed base 12 via a third swing block 11, a swing rod 13 mounted on the end of the fixed base 12, an upper slider fixed base 14 mounted below the swing rod 13, a lower slider fixed base 15 mounted below the upper slider fixed base 14, and a front bag unfolding clip 16 and a rear bag unfolding clip 17 mounted on the surface of the lower slider fixed base 15.
[0020] Furthermore, refer to Figure 1 and Figure 2 It can be seen that the end of the second swing block 6 is adjusted with a shaft, and four small swing blocks are sleeved on the surface of the shaft. The small swing blocks are hinged to the bottom of the second tie rod 8. Through the four small swing blocks, the power can be easily divided into four paths.
[0021] Furthermore, refer to Figure 1 and Figure 2 It can be seen that a disc is sleeved on the upper surface of the second pull rod 8, one end of the spring 9 is welded to the connecting block 10, and the other end of the spring 9 is welded to the disc. The disc facilitates the installation of the function of the spring 9, so that the second pull rod 8 and the spring 9 can play a buffering role.
[0022] Furthermore, refer to Figure 1 and Figure 2 It can be seen that there are two sets of the third pendulum block 11, and four blocks in each set. The two sets of the third pendulum block 11 are symmetrically arranged. By rotating the third pendulum block 11, the second pull rod 8, spring 9 and connecting block 10 can play a buffering role.
[0023] Furthermore, refer to Figure 1 and Figure 2 It can be seen that the end of the first pull rod 5 is connected to the second swing block 6 by bolts, and the second swing block 6 has a through groove that matches the bolts. By sliding the bolts in the through grooves, the first pull rod 5 can drive the second swing block 6 to swing.
[0024] Furthermore, refer to Figure 1 and Figure 2 It can be seen that the small pendulum block is connected to the second tie rod 8 by bolts, and the small pendulum block has a through groove that matches the bolts. By moving the bolts in the through grooves inside the small pendulum block, the third pendulum block 11 can be made to move up and down.
[0025] Furthermore, refer to Figure 1 and Figure 2 It can be seen that the reducer 2 is connected to the fixed base 3 by screws, and screws are installed at all four corners of the reducer 2. The distribution of screws at the four corners can increase the installation stability and reduce vibration and noise.
[0026] Working principle: When using this utility model, according to the appendix Figure 1 Appendix Figure 2 Appendix Figure 3 As shown, the staff powers on the servo motor 1, which drives the first swing block 4 to swing through the reducer 2. The first swing block 4 drives the second swing block 6 to swing through the first pull rod 5. The second swing block 6 drives the four small swing blocks to move through the shaft belt, thus dividing the power into four paths. The first path drives the swing rod 13 to swing, and the second path drives the front and rear sliders to move, thereby realizing the bag unfolding function. This is a bag unfolding mechanism that dispenses four bags at a time. The guide rail is installed on the upper and lower sides of the fixed position, and the slider fixing seat is one on the top and one on the bottom to save space.
[0027] The connecting block 10 and the third swing block 11 can rotate relative to each other. When the bag is unfolded, the swing block pushes upward, and the clamp head unfolds to achieve the bag unfolding function. Since the four sets of bags cannot be unfolded to the same size, some will unfold larger and some smaller. The buffer mechanism composed of the second pull rod 8, spring 9, connecting block 10, and third swing block 11 can effectively solve this problem. When the bag is unfolded to the desired position, the force of the second pull rod 8 is applied to the spring 9, which absorbs this force, allowing the bag to reach the desired state. The above is the complete working principle of this utility model.
[0028] In this utility model, the installation, connection or setting methods of all the components mentioned above are common mechanical methods, and the specific structure, model and coefficient index of all the components are their own technologies. As long as they can achieve their beneficial effects, they can be implemented, so they will not be described in detail.
[0029] The above embodiments are preferred embodiments of the present utility model, but the embodiments of the present utility model are not limited to the above embodiments. Any changes, modifications, substitutions, combinations, or simplifications made without departing from the spirit and principle of the present utility model shall be considered equivalent substitutions and shall be included within the protection scope of the present utility model.
[0030] In this utility model, unless otherwise stated, directional terms such as "up, down, left, right, front, back, inside, outside, and vertical and horizontal" in the terminology only represent the orientation of the term in its conventional use or are common names understood by those skilled in the art, and should not be regarded as limitations on the term. At the same time, numerals such as "first," "second," and "third" do not represent specific quantities or orders, but are only used to distinguish names. Moreover, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a series of elements includes not only those elements, but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.
Claims
1. A bag unfolding mechanism with a buffer, comprising a servo motor (1), characterized in that, The end of the servo motor (1) is connected with a speed reducer (2), and the end of the speed reducer (2) is installed with a fixed base (3), the output end of the speed reducer (2) is connected with a first swing block (4), and the first swing block (4) is hinged with one end of a first pull rod (5), the other end of the first pull rod (5) is hinged with a second swing block (6), the end of the second swing block (6) is connected with a second pull rod (8) through a rotating shaft, and the upper of the second pull rod (8) is fixedly connected with a connecting block (10), the connecting block (10) and the second pull rod (8) are welded with a spring (9), the surface of the rotating shaft is sleeved with a plurality of partitions (7), the connecting block (10) is connected with a fixed base (12) through a third swing block (11), and the end of the fixed base (12) is installed with a swing rod (13), the lower of the swing rod (13) is installed with an upper sliding block fixed base (14), and the lower of the upper sliding block fixed base (14) is provided with a lower sliding block fixed base (15), the surface of the lower sliding block fixed base (15) is installed with a front bag clamp (16) and a rear bag clamp (17).
2. A bag unfolding mechanism with a buffer according to claim 1, characterized in that, The end of the second swing block (6) is adjusted with a shaft, and the surface of the shaft is sleeved with four small swing blocks, the small swing blocks are hingedly installed with the bottom end of the second pull rod (8).
3. A bag unfolding mechanism with a buffer according to claim 1, characterized in that, The upper surface of the second pull rod (8) is sleeved with a disc, one end of the spring (9) is welded with the connecting block (10), and the other end of the spring (9) is welded with the disc.
4. A bag unfolding mechanism with a buffer according to claim 1, characterized in that, The third swing block (11) is provided with two groups, and each group is provided with four, two groups of the third swing block (11) are symmetrically arranged.
5. A bag unfolding mechanism with a buffer according to claim 1, characterized in that, The end of the first pull rod (5) is connected with the second swing block (6) through a bolt, and a through groove matched with the bolt is formed in the second swing block (6).
6. A bag unfolding mechanism with a buffer according to claim 2, characterized in that, The connecting part of the small swing block and the second pull rod (8) is connected through a bolt, and a through groove matched with the bolt is formed in the small swing block.
7. A bag unfolding mechanism with a buffer according to claim 1, characterized in that, The speed reducer (2) is connected with the fixed base (3) through a screw, and the speed reducer (2) is installed with a screw at four corners.