Bag opening expanding mechanism
By employing a combination structure of conical teeth and circumferentially limiting axial sliding parts in the plastic bag packaging equipment, the synchronous adjustment of the distance between the two rotating arms of the plastic bag opening expansion device is achieved, solving the problem of low equipment integration and improving the ease of operation and overall equipment efficiency.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-05-26
- Publication Date
- 2026-04-07
AI Technical Summary
Due to space limitations, the bag opening expansion device of existing plastic bag packaging equipment cannot simultaneously adjust the distance between the two rotating arms, resulting in low equipment integration and difficulty in adjustment.
The structure employs a combination of bevel teeth and circumferentially limiting axial sliding parts. By adjusting the spacing of the support blocks on one side of the cantilever, the support blocks on the other side of the cantilever can move synchronously. The synchronous adjustment of the spacing between the two cantilever arms is achieved through the meshing transmission of the screw and bevel teeth.
It improves the integration of the equipment, avoids the adjustment of the single-sided rotating arm due to obstacles, simplifies the operation of the bag opening expansion device, and improves the adjustment efficiency.
Smart Images
Figure CN224090550U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the technical field of plastic bag packing field especially relates to a bag mouth expansion mechanism. BACKGROUND
[0002] When packing plastic bags, the bag mouth needs to be expanded and then stably supported to facilitate the entrance of the plastic bags in the pile into the bag. Generally, when the bag mouth expansion device is used, the distance between the two sides of the rotary arm is adjustable, so it is necessary to set a separate rotary arm on each rotary arm to adjust the distance between the two side supporting blocks on the rotary arm. However, due to the limited installation space of the equipment, the adjustment mechanism of the rotary arm on the side close to the production line is not easy to touch and adjust, and at the same time, if the two rotary arms need to be adjusted at the same time, the distance between the two rotary arms needs to be adjusted. SUMMARY
[0003] The utility model provides a bag mouth expansion mechanism, which is used to solve the technical problems existing in the above-mentioned technical field. The conical gear provided on the rotary arm is matched with the circumferential limiting axial sliding member to realize the adjustment of the distance between the two supporting blocks on one side of the cantilever, so that the circumferential limiting axial sliding member is transmitted to the other side of the cantilever, the synchronous movement of the supporting blocks on the two sides of the cantilever is realized, the integration of the equipment is improved, the problem that the use of the rotary knob is affected by the obstacles of other devices due to the one side of the cantilever is avoided, and the distance between the two rotary arms can be adjusted by adjusting the distance between the two supporting blocks on one side of the cantilever.
[0004] To solve the above technical problems, the technical scheme adopted by the utility model is: two cantilevers with adjustable distance are arranged oppositely; supporting blocks are slidably arranged on the cantilevers; two supporting blocks on the same cantilever are further connected by a threaded rod; a first conical gear is arranged at the end of the threaded rod; a second conical gear meshing with the first conical gear is arranged on the cantilever; the second conical gears between the two cantilevers are connected by a circumferential limiting axial sliding member.
[0005] Further optimization of the technical scheme is that the circumferential limiting axial sliding member is an outer tube and an inner tube that are nested; the outer tube and the inner tube are connected with the two second conical gears respectively, and the outer tube and the inner tube are axially slidably arranged; a blocking body limiting the circumferential relative rotation of the outer tube and the inner tube is arranged on the outer tube and the inner tube.
[0006] Further optimization of the technical scheme is that the circumferential limiting axial sliding member is a mother-son outer hexagonal sleeve and an inner hexagonal sleeve; the two ends of the two sleeves are connected with the two second conical gears respectively; the two sleeves are nested.
[0007] Further optimization of the technical scheme is that a rotary knob is arranged outside the second conical gear on one side of the cantilever.
[0008] Further optimization of the technical scheme is that the threads on the two sides of the threaded rod used to connect the two supporting blocks on the same cantilever are symmetrically arranged.
[0009] Compared with the prior art, the utility model has the advantages that the bevel gear arranged on the rotary arm is matched with the circumferential limiting axial sliding piece, this structure beneficially guarantees that the distance between the two supporting blocks on one side of the cantilever is adjusted, the circumferential limiting axial sliding piece is transmitted to the other side of the cantilever, the synchronous movement of the supporting blocks on both sides of the cantilever is realized, the integration of the equipment is improved, the problem that the knob use is influenced due to the obstacle of other devices on one side of the cantilever is avoided, and the distance between both sides of the rotary arm can be adjusted by adjusting the distance between one side of the cantilever. BRIEF DESCRIPTION OF DRAWINGS
[0010] Fig. 1 It is a whole structure schematic view of a bag mouth expansion mechanism.
[0011] Fig. 2 It is a whole lower structure schematic view of a bag mouth expansion mechanism.
[0012] Fig. 3 It is a hexagonal sleeve and inner hexagonal sleeve schematic view of a bag mouth expansion mechanism.
[0013] In the figure: 1, cantilever; 2, supporting block; 3, screw rod; 4, first bevel gear; 5, second bevel gear; 6, circumferential limiting axial sliding piece; 7, outer hexagonal sleeve; 8, inner hexagonal sleeve; 9, knob; 10, outer tube; 11, inner tube. DETAILED DESCRIPTION
[0014] In order to make the purpose, technical scheme and advantages of the utility model more clear and obvious, the utility model is further explained in detail below by combining with specific implementation manners and referring to the drawings. It should be understood that these descriptions are only exemplary, and are not intended to limit the scope of the utility model. In addition, in the following description, the description of the known structure and technology is omitted to avoid unnecessary confusion of the concept of the utility model.
[0015] DETAILED DESCRIPTION: in combination with Figs. 1-3As shown in the figure, a bag mouth expansion mechanism, two cantilevers 1 with adjustable spacing are oppositely arranged; the supporting blocks 2 are slidably arranged on the cantilevers 1; the two supporting blocks 2 on the same cantilever 1 are further threadedly connected through a screw rod 3; the first bevel gears 4 are arranged at the ends of the screw rod 3; the second bevel gears 5 are arranged on the cantilevers 1 and engaged with the first bevel gears 4; the second bevel gears 5 between the two cantilevers 1 are connected through the circumferential limiting axial sliding members 6; the circumferential limiting axial sliding members 6 are outer tubes 10 and inner tubes 11 in outer- inner fitting; the outer tubes 10 and the inner tubes 11 are axially slidably arranged; the blocking bodies limiting the circumferential relative rotation of the outer tubes 10 and the inner tubes 11 are arranged between the outer tubes 10 and the inner tubes 11; the circumferential limiting axial sliding members 6 are a mother- daughter outer hexagonal sleeve 7 and an inner hexagonal sleeve 8; the two sleeves are connected with the two second bevel gears 5 at the two ends respectively; the two sleeves are fitted; the second bevel gears 5 on one side of the cantilever 1 are outwardly provided with knobs 9 outwardly; the screw rods 3 for connecting the two supporting blocks 2 on the same cantilever 1 are symmetrically provided with threads on the two sides.
[0016] In combination Figs. 1-3 As shown in the figure, in use, the spacing between the two side rotary arms is adjustable, the inner tubes 11 and the outer tubes 10 are axially slidably arranged or the inner hexagonal sleeves 8 and the outer hexagonal sleeves 7 are axially slidably arranged, both of which can take into account the spacing adjustment between the rotary arms and will not conflict; after the spacing between the rotary arms is adjusted, when the spacing between the two supporting blocks 2 on the same cantilever 1 needs to be adjusted, the second bevel gears 5 on one side are rotated by rotating the knobs 9 or by driving a motor, the inner tubes 11 and the outer tubes 10 are matched or the inner hexagonal sleeves 8 and the outer hexagonal sleeves 7 are matched, the synchronous rotation of the two second bevel gears 5 is realized, the synchronous rotation of the two screw rods 3 is further realized by the first bevel gears 4, and the synchronous rotation of the supporting blocks 2 on the two cantilevers 1 is realized by one side control.
[0017] It should be understood that the above specific embodiments of the present application are only used for illustrative or explanatory purposes of the principles of the present application, and do not constitute a limitation on the present application. Therefore, any modification, equivalent replacement, improvement, etc. made without departing from the spirit and scope of the present application shall be included in the protection scope of the present application. In addition, the appended claims of the present application are intended to cover all changes and modifications falling within the scope and boundary of the appended claims, or the equivalent forms of such scope and boundary.
Claims
1. A bag opening expansion mechanism comprising two cantilever arms (1) with adjustable spacing arranged opposite each other; a support block (2) is slidably disposed on each cantilever arm (1); characterized in that: The two support blocks (2) located on the same cantilever (1) are also connected by a screw (3); the end of the screw (3) is provided with a first bevel tooth (4); the cantilever (1) is provided with a second bevel tooth (5) that meshes with the first bevel tooth (4); the second bevel tooth (5) between the two cantilever (1) is connected by a circumferential limiting axial sliding member (6).
2. The bag opening expansion mechanism according to claim 1, characterized in that: The circumferential limiting axial sliding member (6) consists of an outer tube (10) and an inner tube (11) that are fitted together; the outer tube (10) and the inner tube (11) are axially slidably arranged; a blocking body is provided between the outer tube (10) and the inner tube (11) to restrict the relative circumferential rotation between them.
3. The bag opening expansion mechanism according to claim 2, characterized in that: The circumferential limiting axial sliding component (6) consists of a male and female external hexagonal sleeve (7) and an internal hexagonal sleeve (8); the two ends of the two sleeves are respectively connected to two second bevel teeth (5); the two sleeves fit together.
4. The bag opening expansion mechanism according to claim 1, characterized in that: A knob (9) is provided on the outer side of the second bevel tooth (5) on one side cantilever (1).
5. A bag opening expansion mechanism according to claim 1, characterized in that: The screw (3) used to connect two support blocks (2) on the same cantilever (1) has symmetrical threads on both sides.