Large rocker arm improved structure, overload protection device and packaging machine lifter
By setting a small rocker arm placement groove and an overload ball channel on the large rocker arm of the packaging machine elevator, and adding a protrusion and a mounting threaded hole, combined with an overload protection device, the problem of easy damage to the overload protection device is solved, and the stable operation of the equipment and the reduction of maintenance costs are achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HONGYUN HONGHE TOBACCO (GRP) CO LTD
- Filing Date
- 2025-05-21
- Publication Date
- 2026-05-12
AI Technical Summary
The overload protection device of the existing packaging machine elevator is prone to damage to the connecting parts due to frequent overload, requiring frequent replacement of the large rocker arm, which affects equipment efficiency and increases labor intensity.
By setting a small rocker arm placement groove and an overload ball channel on the large rocker arm, and setting a protrusion on one side of the groove bottom, and adding a threaded hole for fixing the overload protection device, including an overload ball, an overload elastic plate and a fastening threaded part, the structure of the large rocker arm is improved to enhance its strength and stability.
This reduces the frequency of large rocker arm replacements, decreases maintenance costs and labor intensity, and improves equipment operating efficiency and quality.
Smart Images
Figure CN224225383U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of cigarette manufacturing technology, and in particular to an improved structure of a large rocker arm, an overload protection device, and a packaging machine lifter. Background Technology
[0002] In cigarette production, cigarette box packaging is a crucial process that requires the use of packaging machines. The function of the packaging machine's lifter is generally to raise the packaged cigarette packs or cartons along with a single sheet of transparent paper with a pull string. During this lifting process, the transparent paper is wrapped in an inverted "U" shape on the surface of the cigarette box and raised to a position flush with the next packaging channel. Then, the transparent paper folding plate and the cigarette pusher plate push the cigarette packs or cartons with the transparent paper to the right.
[0003] During the production process of packaging machines, unexpected factors often result in cigarette cartons or packs not being properly wrapped with the outer label paper. These cigarette cartons or packs will then become clogged when pushed to the elevator and lifted during operation. For example... Figure 1 and Figure 2 As shown, to prevent the elevator from malfunctioning due to blockage and potentially damaging the machine, an overload protection device 300 is added to the elevator. The existing overload protection device 300 consists of an overload elastic plate 320 and an overload slip ball 310. The overload elastic plate 320, through a connector, presses the overload slip ball 310 into the placement hole of the small rocker arm 200, which is responsible for effective work, after passing through the large rocker arm 100. When blockage occurs at the elevator, causing machine overload, the overload slip ball 310 will disengage from the placement hole of the small rocker arm 200, overcoming the pressure of the overload elastic plate 320 and moving outward. At this time, the combination of the small rocker arm 200 and the large rocker arm 100 will disengage, and the elevator can continue its reciprocating mechanical action. The large rocker arm 100 will also continue to swing, but the small rocker arm 200 will no longer swing with the large rocker arm 100. The elevator will no longer perform effective work, and the blockage will no longer result in lifting action, thus protecting the machine from overload.
[0004] In existing technology, the force exerted by the overload elastic plate 320 during outward deformation acts on the connecting parts and the thin wall on one side of the large rocker arm 100 where the connecting parts are located. Frequent overloads can cause the thin wall to be stretched and deformed or the mating structure of the connecting parts to be damaged. In this case, the overload protection device 300 will fail, and the large rocker arm 100 will need to be replaced. Replacing the large rocker arm 100 is a very large workload, usually requiring on-site personnel to work continuously for 6-8 hours, which seriously affects the effective operating rate of the equipment and increases the labor intensity of the workers. Utility Model Content
[0005] The purpose of this utility model is to provide an improved structure for a large rocker arm, an overload protection device, and a packaging machine lift, which can improve the strength of the large rocker arm, stabilize the assembly structure, and enhance the overload protection effect; reduce maintenance manpower and material costs, ensure operational efficiency, and effectively improve operational quality.
[0006] To achieve this objective, the present invention adopts the following technical solution:
[0007] An improved structure for the large rocker arm enhances its strength. The large rocker arm includes a small rocker arm placement groove, with an overload ball bearing channel formed on one side wall of the groove. The large rocker arm also has a protrusion integrally formed on one side of the bottom of the small rocker arm placement groove. The protrusion has a threaded mounting hole, the extension direction of which is parallel to the extension direction of the overload ball bearing channel. The extension direction of the threaded mounting hole is the thickness direction of the protrusion, and the length of the threaded mounting hole is greater than the thickness of one side wall of the small rocker arm placement groove.
[0008] As an optional technical solution for improving the structure of the large rocker arm, the thickness of the protrusion is equal to the thickness of the large rocker arm.
[0009] As an optional technical solution for improving the structure of the large rocker arm, one or more mounting threaded holes are provided.
[0010] As an optional technical solution for improving the structure of the large rocker arm, two mounting threaded holes are provided, which are distributed horizontally or vertically.
[0011] An overload protection device is fixed to the improved rocker arm structure as described in any of the above embodiments. The overload protection device includes an overload ball, an overload elastic plate, and a fastening threaded component. The fastening threaded component can pass through the overload elastic plate and be threaded into the mounting threaded hole. The fastening threaded component and the mounting threaded hole are respectively provided. The overload elastic plate is fixedly covered on the outside of the overload ball channel to selectively prevent the overload ball from sliding out of the overload ball channel.
[0012] As an optional technical solution for the overload protection device, the overload protection device further includes a pressure block, the fastening threaded component passing through the pressure block, the overload elastic plate and the protrusion in sequence, the pressure block covering the side of the overload elastic plate away from the overload ball channel, and the projection of the overload ball on the overload elastic plate is located at the part of the overload elastic plate exposed in the pressure block.
[0013] As an optional technical solution for overload protection devices, a rubber pad is provided between the pressure block and the overload elastic sheet and / or between the overload elastic sheet and the protrusion, and the overload elastic sheet and the rubber pad are interference fit.
[0014] As an optional technical solution for overload protection devices, the fastening threaded component is configured as a bolt, and the tail of the bolt has an internal hexagonal groove.
[0015] A packaging machine lifter includes an overload protection device as described in any of the above claims. The packaging machine lifter also includes a large rocker arm and a small rocker arm. The small rocker arm is hinged to the large rocker arm so that the small rocker arm can be selectively placed in the small rocker arm placement slot. The small rocker arm has an overload slip ball placement position. When the small rocker arm is placed in the small rocker arm placement slot, the overload slip ball placement position is coaxially arranged with the overload slip ball channel.
[0016] As an optional technical solution for the packaging machine lifter, two opposing protective grooves are dug on the two side walls of the small rocker arm placement groove. The overload slip ball channel is opened at the bottom of the protective groove so that the overload slip ball placement position and the overload slip ball channel are spaced apart. The distance between the bottoms of the two protective grooves is greater than the diameter of the overload slip ball.
[0017] The beneficial effects of this utility model are:
[0018] The improved large rocker arm structure provided by this utility model includes a small rocker arm placement groove. One side wall of the small rocker arm placement groove has an overload ball channel. A protrusion is integrally formed on one side of the bottom of the small rocker arm placement groove. This redesign of the large rocker arm structure improves its strength. The protrusion has a threaded mounting hole, the extension direction of which is parallel to the extension direction of the overload ball channel and the thickness direction of the protrusion. The length of the threaded mounting hole is greater than the thickness of one side wall of the small rocker arm placement groove, increasing the mating length of the connecting parts on the large rocker arm, i.e., the length of the threaded mounting hole. This prevents the mating structure of the connecting parts from being easily damaged. It also avoids designing the mating structure of the connecting parts at thin-walled locations on the large rocker arm, eliminating the problem of deformation at these locations.
[0019] The overload protection device provided by this utility model is fixed to the above-mentioned improved structure of the large rocker arm, including an overload ball, an overload elastic plate, and a fastening threaded component. The fastening threaded component can pass through the overload elastic plate and be threaded into the mounting threaded hole of the protruding part. The fastening threaded component and the mounting threaded hole are set one-to-one. The fixed position of the fastening threaded component has been changed, and the mating structure of the original connecting parts is more open, providing more space for workers to install, disassemble, and maintain, and making the operation simpler and more convenient. The overload elastic plate is fixedly covered on the outside of the overload ball channel to selectively prevent the overload ball from sliding out of the overload ball channel.
[0020] The packaging machine lift provided by this utility model includes the overload protection device mentioned above. The packaging machine lift also includes a large rocker arm and a small rocker arm. The small rocker arm is hinged to the large rocker arm so that the small rocker arm can be selectively placed in the small rocker arm placement groove. The small rocker arm has an overload slip ball placement position. When the small rocker arm is placed in the small rocker arm placement groove, the overload slip ball placement position is coaxially arranged with the overload slip ball channel. By improving the large rocker arm and the overload protection device, not only is the frequency of replacement of the large rocker arm and maintenance costs reduced, and the labor intensity of the workers reduced, but also the work efficiency is guaranteed and the work quality is effectively improved. Attached Figure Description
[0021] Figure 1 This is a structural schematic diagram of a packaging machine elevator in the prior art;
[0022] Figure 2 This is an exploded view of a packaging machine lift (fastening threaded parts not shown) in the prior art;
[0023] Figure 3 This is a schematic diagram of the structure of the packaging machine elevator provided in a specific embodiment of the present utility model;
[0024] Figure 4 This is an exploded view of the packaging machine lifter (fastening threaded parts not shown) provided in a specific embodiment of this utility model;
[0025] Figure 5 This is a structural schematic diagram of the fastening threaded component of the packaging machine lifter provided in a specific embodiment of this utility model;
[0026] Figure 6 This is a schematic diagram of the structure of the large rocker arm of the packaging machine lift provided in a specific embodiment of this utility model.
[0027] In the picture:
[0028] 100. Large rocker arm; 101. Small rocker arm placement slot; 102. Overload ball bearing channel; 103. Protective groove; 110. Protrusion; 111. Mounting threaded hole;
[0029] 200. Small rocker arm; 201. Overload ball bearing holder;
[0030] 300. Overload protection device; 310. Overload slip ball; 320. Overload elastic plate; 330. Fastening threaded part; 331. Socket hexagonal groove; 340. Pressure block. Detailed Implementation
[0031] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.
[0032] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0033] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.
[0034] In the description of this embodiment, the terms "upper," "lower," "right," and "left," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.
[0035] like Figures 2 to 6As shown, this utility model discloses an improved structure for a large rocker arm. The large rocker arm 100 is provided with a small rocker arm placement groove 101. An overload ball bearing channel 102 is formed on one side wall of the small rocker arm placement groove 101. A protrusion 110 is provided on the large rocker arm 100, integrally formed on one side of the bottom of the small rocker arm placement groove 101. This redesign of the structure of the large rocker arm 100 improves its strength. The protrusion 110 has a threaded mounting hole 111, the extension direction of which is parallel to the overload ball bearing channel 102. The extension direction is parallel, and the extension direction of the mounting threaded hole 111 is the thickness direction of the protrusion 110. The length of the mounting threaded hole 111 is greater than the thickness of one side wall of the small rocker arm placement groove 101, which increases the mating length of the connector on the large rocker arm 100, that is, the length of the mounting threaded hole 111. This will prevent the mating structure of the connector from being easily damaged, reducing the probability of failure of the mounting threaded hole 111. At the same time, it also avoids the design of the mating structure of the connector at the thin wall position of the large rocker arm 100, eliminating the problem of deformation of the large rocker arm 100 at the thin wall position.
[0036] Specifically, the thickness of the protrusion 110 is equal to the thickness of the large rocker arm 100. The mounting threaded hole 111 is drilled through the thickness direction of the protrusion 110, and the length of the mounting threaded hole 111 is the thickness of the protrusion 110, which is the length of the connecting and mating structure. The protrusion 110 and the large rocker arm 100 are of the same thickness, which facilitates manufacturing. The protrusion 110 and the rest of the large rocker arm 100 are integrally set, so that the large rocker arm 100 has high strength as a whole and effectively resists stress damage during operation.
[0037] This utility model also discloses an overload protection device 300, which is fixedly applied to the above-mentioned improved rocker arm structure. It includes an overload ball 310, an overload elastic plate 320, and a fastening threaded component 330. The fastening threaded component 330 can pass through the overload elastic plate 320 and be threaded into the mounting threaded hole 111 of the protrusion 110. The fastening threaded component 330 and the mounting threaded hole 111 are arranged in a one-to-one correspondence. The fixed position of the fastening threaded component 330 has been changed, and the mating structure of the original connecting parts is more open, providing more space for workers to install, remove, and maintain, and making the operation simpler and more convenient. The overload elastic plate 320 is fixedly covered on the outside of the overload ball channel 102 to selectively prevent the overload ball 310 from sliding out of the overload ball channel 102.
[0038] Specifically, the fastening threaded part 330 is a bolt, and the tail of the bolt has an internal hexagonal groove 331. The side of the protrusion 110 away from the overload protection device 300 can expose the tail of the bolt. During operation, there is an inevitable risk of the bolt breaking. The internal hexagonal groove 331 at the tail can help the workers to remove the remaining bolt left in the installation threaded hole 111 more easily and effortlessly after the bolt breaks.
[0039] Optionally, one or more mounting threaded holes 111 are provided. To ensure more stable assembly of the overload elastic plate 320 and prevent rotational displacement, at least two mounting threaded holes 111 are required. Alternatively, a limiting groove can be provided at the contact position between the overload elastic plate 320 and the large rocker arm 100. For example, the overload elastic plate 320 is a rectangular spring sheet with a regular shape that can completely fit and cover the overload ball channel 102.
[0040] In this embodiment, two mounting threaded holes 111 are provided, which are distributed horizontally. Correspondingly, two fastening threaded parts 330 are provided. Alternatively, the mounting threaded holes 111 can be arranged vertically at intervals along the direction close to the overload ball channel 102. It is only necessary to ensure that the pressure of the overload elastic plate 320 being squeezed and lifted by the overload ball 310 will not damage the overload elastic plate 320 or cause serious wear to the small rocker arm 200, thus ensuring the structural stability of the overload protection device 300.
[0041] Furthermore, the overload protection device 300 also includes a pressure block 340. The fastening thread 330 passes through the pressure block 340, the overload elastic plate 320 and the protrusion 110 in sequence. The pressure block 340 covers the side of the overload elastic plate 320 away from the overload ball channel 102, and the projection of the overload ball 310 on the overload elastic plate 320 is located on the part of the overload elastic plate 320 exposed in the pressure block 340. This can also ensure the structural stability of the overload protection device 300 and protect the overload elastic plate 320 from damage.
[0042] In one embodiment of this invention, rubber pads are sandwiched between the pressure block 340 and the overload elastic plate 320, and between the overload elastic plate 320 and the protrusion 110, with the overload elastic plate 320 and the rubber pads having an interference fit. The rubber pads not only protect the pressure block 340 and the protrusion 110, reducing wear, but also have the characteristic of being able to undergo slight deformation under pressure. Due to the interference fit between the overload elastic plate 320 and the rubber pad, the rubber pad has a certain degree of concave flattening deformation immediately after installation. When the mating structure between the fastening threaded part 330 and the mounting threaded hole 111 becomes loose, the rubber pad can recover its deformation to compensate for the assembly wear gap generated during the operation of the overload protection device 300. The purpose of this arrangement is to further reduce the frequency of maintenance and replacement of the overload protection device 300.
[0043] In another embodiment of this invention, a rubber pad is sandwiched only between the pressure block 340 and the overload elastic sheet 320. In yet another embodiment of this invention, a rubber pad is sandwiched only between the overload elastic sheet 320 and the protrusion 110.
[0044] This utility model also discloses a packaging machine lifter, including the overload protection device 300 mentioned above. The packaging machine lifter also includes a large rocker arm 100 and a small rocker arm 200. The large rocker arm 100 has the improved structure of the large rocker arm mentioned above. The small rocker arm 200 is hinged to the large rocker arm 100 so that the small rocker arm 200 can be selectively placed in the small rocker arm placement groove 101. The small rocker arm 200 has an overload ball placement position 201. When the small rocker arm 200 is placed in the small rocker arm placement groove 101, the overload ball placement position 201 is coaxially arranged with the overload ball channel 102. By improving the large rocker arm 100 and the overload protection device 300, not only is the frequency of replacement and maintenance cost of the large rocker arm 100 reduced, and the labor intensity of the workers is reduced, but also the work efficiency is guaranteed and the work quality is effectively improved.
[0045] Specifically, two opposing protective grooves 103 are excavated on the two side walls of the small rocker arm placement groove 101. The overload ball channel 102 is located at the bottom of the protective groove 103, so that the overload ball placement position 201 and the overload ball channel 102 are spaced apart. The distance between the bottoms of the two protective grooves 103 is greater than the diameter of the overload ball 310, leaving a gap and tendency for the overload ball 310 to move, thus preventing the overload protection device 300 from jamming with the large rocker arm 100 and the small rocker arm 200. When the overload ball 310 slides out of the overload ball placement position 201 and pushes up the overload elastic plate 320, the large rocker arm 100 and the small rocker arm 200 disengage. The small rocker arm 200 naturally falls into the monitoring range of the stop signal, which will trigger a fault alarm of "lifter blockage" on the central control display and stop the machine in time, reminding the staff to handle and repair it in time.
[0046] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.
Claims
1. An improved structure for a large rocker arm (100) to enhance its strength, wherein the large rocker arm (100) is provided with a small rocker arm placement groove (101), and an overload ball bearing channel (102) is formed on one side wall of the small rocker arm placement groove (101), characterized in that, The large rocker arm (100) is provided with a protrusion (110), which is integrally disposed on one side of the bottom of the small rocker arm placement groove (101). The protrusion (110) is provided with a mounting threaded hole (111), the extension direction of which is parallel to the extension direction of the overload ball channel (102), the extension direction of which is the thickness direction of the protrusion (110), and the length of which is greater than the thickness of one side wall of the small rocker arm placement groove (101).
2. The improved structure of the large rocker arm according to claim 1, characterized in that, The thickness of the protrusion (110) is equal to the thickness of the large rocker arm (100).
3. The improved structure of the large rocker arm according to claim 1, characterized in that, One or more mounting threaded holes (111) are provided.
4. The improved structure of the large rocker arm according to claim 3, characterized in that, There are two mounting threaded holes (111), which are distributed horizontally or vertically.
5. An overload protection device, characterized in that, Fixed to the improved rocker arm structure as described in any one of claims 1-4, the overload protection device includes an overload ball (310), an overload elastic plate (320), and a fastening threaded component (330). The fastening threaded component (330) can pass through the overload elastic plate (320) and be threaded into the mounting threaded hole (111). The fastening threaded component (330) and the mounting threaded hole (111) are provided in a one-to-one correspondence. The overload elastic plate (320) is fixedly covered on the outside of the overload ball channel (102) to selectively prevent the overload ball (310) from sliding out of the overload ball channel (102).
6. The overload protection device according to claim 5, characterized in that, The overload protection device further includes a pressure block (340), the fastening threaded part (330) passes through the pressure block (340), the overload elastic sheet (320) and the protrusion (110) in sequence, the pressure block (340) covers the side of the overload elastic sheet (320) away from the overload ball channel (102), and the projection of the overload ball (310) on the overload elastic sheet (320) is located on the part of the overload elastic sheet (320) exposed in the pressure block (340).
7. The overload protection device according to claim 6, characterized in that, A rubber pad is provided between the pressure block (340) and the overload elastic sheet (320) and / or between the overload elastic sheet (320) and the protrusion (110), and the overload elastic sheet (320) and the rubber pad are interference fit.
8. The overload protection device according to any one of claims 5-7, characterized in that, The fastening threaded part (330) is configured as a bolt, and the tail of the bolt is provided with an internal hexagonal groove (331).
9. A packaging machine elevator, characterized in that, Including the overload protection device as described in any one of claims 5-8, the packaging machine lifter further includes a large rocker arm (100) and a small rocker arm (200), the small rocker arm (200) being hinged to the large rocker arm (100) so that the small rocker arm (200) can be selectively placed in a small rocker arm placement slot (101), the small rocker arm (200) having an overload ball placement position (201), when the small rocker arm (200) is placed in the small rocker arm placement slot (101), the overload ball placement position (201) is coaxially arranged with the overload ball channel (102).
10. The packaging machine elevator according to claim 9, characterized in that, The small rocker arm placement groove (101) has two opposing protective grooves (103) dug on its two side walls. The overload ball channel (102) is located at the bottom of the protective groove (103) so that the overload ball placement position (201) and the overload ball channel (102) are spaced apart. The distance between the bottoms of the two protective grooves (103) is greater than the diameter of the overload ball (310).