Device for controlling single weight of cigarette through displacement of servo mechanism

Abstract

The utility model discloses a device for controlling the single weight of a cigarette through displacement of a servo mechanism. The device comprises an air suction chamber, a sector gear, a servo mechanism box body, a servo motor, a U-shaped groove block, a trimming disc, a cut tobacco suction belt pressing shoe and a sliding rod. Through low-cost transformation, a servo mechanism is directly fixed on the upper side of an air suction chamber, an original servo mechanism is moved to the upper end of the air suction chamber to be integrated with the air suction chamber, and on the basis, the relative height of a cut tobacco suction belt and a finishing disc is changed by moving a cut tobacco suction belt pressing shoe up and down. The transmission path length of the control system is obviously shortened, the structure of the weight control system is simplified, the response speed of the weight control system is improved, and the maintenance cost is reduced; the density and the section shape of the trimmed tobacco shreds are very stable, fluctuation of the weight of the cigarettes is reduced, stable filling of the tobacco shreds is guaranteed, and the weight control precision and the waste quantity of the cigarettes are improved.

Description

Technical Field

[0001] The utility model belongs to the field of cigarette production equipment, and in particular relates to a device for controlling the weight of a cigarette by shifting a servo mechanism. Background Art

[0002] During the tobacco leaf processing, weight control of cigarettes is an important link in ensuring product quality standards. If the weight of a cigarette cannot be guaranteed to meet a uniform standard, it will be a very serious production accident.

[0003] The existing technology of cigarette weight control devices often uses complex mechanical structures to achieve the movement of the suction belt and pressure shoe. For example, the widely used PROTOS70 cigarette making machine uses the method of moving the trimming disk assembly up and down to control the weight of the cigarette, and the corresponding servo mechanism is installed on the bottom plate of the frame on the lower side of the trimming disk assembly. The control device of this layout structure has problems such as long transmission path, slow response speed, and high maintenance cost. At the same time, the relative position adjustment of the trimming disk and the suction belt is not flexible enough, which affects the stability of tobacco filling and the uniformity of cigarette weight.

[0004] Therefore, providing a cigarette weight control device that can reduce the transmission path length of the control device, simplify the weight control system structure, improve the response speed of the weight control system, and reduce maintenance costs is a technical problem that urgently needs to be solved in this field. Utility Model Content

[0005] In order to solve the common problems of long transmission path and complex structure in the above-mentioned prior art cigarette weight control devices, this technical solution proposes an innovative device for controlling the weight of cigarettes through the displacement of a servo mechanism. The device aims to significantly shorten the transmission path length of the control system and simplify the weight control system structure by directly fixing the servo mechanism on the upper side of the suction chamber.

[0006] The utility model provides a device for controlling the weight of a single cigarette by shifting a servo mechanism. The specific technical solution is as follows: an air suction chamber, a sector gear, a servo mechanism housing, a servo motor, a U-shaped groove block, a trimming plate, a suction ribbon pressing shoe, and a slide rod;

[0007] The top of the air suction chamber is provided with a servo mechanism box with a hollow structure, the sector gear is provided in the servo mechanism box, and the servo motor is provided outside the servo mechanism box, and the output end thereof is engaged with the sector gear;

[0008] The sector gear is provided with a rotation hole, and the sector gear rotates around the rotation hole under the drive of the servo motor;

[0009] The sector gear is hingedly connected to the U-shaped slot block, and the U-shaped slot block is used to convert the circular swing motion of the sector gear into an up-and-down linear motion;

[0010] Inside the suction chamber, the sliding rod and the suction belt pressing shoe are arranged in a vertical direction, and the sliding rod is connected to the U-shaped groove block;

[0011] The servo motor is controlled to drive the sector gear to drive the suction belt pressing shoe to move, thereby adjusting the height distance between the suction belt pressing shoe and the trimming disk.

[0012] Preferably, a sliding seat is further provided on the top of the suction chamber, and the sliding rod is plugged into the sliding seat and penetrates the interior of the suction chamber to be connected with the suction belt pressure shoe.

[0013] Preferably, a rotation limiting assembly is further provided on the top of the sliding seat, and the sliding rod is plugged into the sliding seat via the rotation limiting assembly.

[0014] Preferably, the rotation limiting assembly specifically includes: a dovetail groove seat and a dovetail groove guide block;

[0015] The dovetail groove seat is arranged on the top of the sliding seat, and the sliding rod is connected to the dovetail groove seat through the dovetail groove guide block and inserted into the sliding seat.

[0016] Preferably, the U-shaped groove block and the rotation limiting assembly, the rotation limiting assembly and the sliding rod, and the sliding rod and the suction wire pressing shoe can be detachably connected to each other.

[0017] Preferably, the U-shaped groove block and the rotation limiting assembly, the rotation limiting assembly and the sliding rod, and the sliding rod and the suction belt pressing shoe are connected to each other specifically through threaded screws.

[0018] Preferably, the servo motor is a servo motor with a built-in reducer.

[0019] Preferably, a displacement sensor is further provided on the servo mechanism housing, and the displacement sensor is used to detect the displacement of the sector gear, and the displacement sensor is electrically connected to the servo motor.

[0020] Preferably, the servo motor is perpendicular to the servo mechanism housing and is arranged flat on the outer surface of the servo mechanism housing.

[0021] As an advantage, the control device provided by the present application also includes a control unit, which realizes closed-loop control of the sector gear and the servo motor through the control unit and the displacement sensor.

[0022] Compared to existing cigarette weight control devices, this proposed solution, which controls cigarette weight through servo-mechanism displacement, significantly shortens the control system's transmission path by positioning the servo mechanism above the suction chamber, simplifying the weight control system's structure, improving its response speed, and reducing maintenance costs. Furthermore, the improved trimming plate can be positioned at a fixed height within a narrow gap. The tobacco is enclosed within a relatively closed area formed by the suction belt, front and rear guide rails, and trimming plate. The trimmed tobacco maintains a stable density and cross-sectional shape, minimizing cigarette weight fluctuations and ensuring stable tobacco filling, thereby effectively reducing the rejection rate of excessively heavy and empty cigarettes. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments recorded in this application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0024] Figure 1 It is a schematic diagram of the three-dimensional structure of a device for controlling the weight of a cigarette by shifting a servo mechanism in a specific embodiment.

[0025] The reference numerals are as follows:

[0026] 1. Suction chamber; 2. Fan gear; 3. Servo mechanism housing; 4. Servo motor; 5. Displacement sensor; 6. U-shaped groove block; 7. Rotation limit assembly; 8. Sliding seat; 9. Trimming plate; 10. Suction wire pressing shoe; 11. Sliding rod. DETAILED DESCRIPTION

[0027] In order to help those skilled in the art better understand the technical solutions in this application, the technical solutions in the embodiments of this application will be clearly and completely described below. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without making any creative efforts shall fall within the scope of protection of this application.

[0028] It should be noted that when an element is referred to as being “fixed on” or “set on” another element, it can be directly on the other element or indirectly set on the other element; when an element is referred to as being “connected to” another element, it can be directly connected to the other element or indirectly connected to the other element.

[0029] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0030] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of technical features indicated. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of such features. Throughout the description of this application, "plurality" or "several" means two or more, unless otherwise specifically defined.

[0031] It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the conditions under which this application can be implemented. Therefore, they have no substantive technical significance. Any structural modification, change in proportional relationship or adjustment of size should still fall within the scope of the technical content disclosed in this application without affecting the efficacy and purpose that can be achieved by this application.

[0032] Please refer to Figure 1 The present invention specifically describes a device for controlling the weight of a cigarette by shifting a servo mechanism. The device comprises: an air suction chamber 1, a sector gear 2, a servo mechanism housing 3, a servo motor 4, a U-shaped groove block 6, a trimming plate 9, a suction ribbon pressing shoe 10, and a slide bar 11.

[0033] Compared with the prior art, the cigarette weight control device adopts a trimming plate 9 assembly mechanism to control the cigarette weight by moving up and down. The corresponding servo mechanism is installed on the frame bottom plate on the lower side of the trimming plate 9 assembly. Such a structural design occupies a large space structure. At the same time, the transmission path of the servo mechanism is long, which also brings a longer reaction time to the response speed of the trimming plate 9.

[0034] In a specific embodiment provided by the present utility model, Figure 1As shown, the top of the suction chamber 1 is provided with the servo mechanism box 3 of a hollow structure, which is used to set an overall servo transmission structure to drive and adjust the distance between the suction ribbon and the trimming disk 9. The sector gear 2 is provided in the servo mechanism box 3, and the servo motor 4 is provided outside the servo mechanism box 3. The output end of the servo motor 4 is engaged with the sector gear 2. Through the sector gear 2, the power output by the servo motor 4 is converted into the driving force for the circular swing of the sector gear 2;

[0035] like Figure 1 As shown, a rotation hole is provided on the sector gear 2, and the sector gear 2 rotates around the rotation hole under the drive of the servo motor 4, converting the circumferential rotation of the servo motor 4 into an arc swinging motion of the sector gear 2;

[0036] The sector gear 2 is hingedly connected to the U-shaped slot block 6, and the U-shaped slot block 6 is used to convert the circular swing motion of the sector gear 2 into the up and down linear motion of the U-shaped slot block 6;

[0037] like Figure 1 As shown, inside the suction chamber 1, the sliding rod 11 and the suction belt pressing shoe 10 are vertically arranged, and the sliding rod 11 is connected to the U-shaped groove block 6;

[0038] By controlling the servo motor 4 to drive the sector gear 2, the suction belt pressing shoe 10 is driven to move, thereby adjusting the height distance between the suction belt pressing shoe 10 and the trimming plate 9;

[0039] It can be understood that compared with the prior art in which a lengthy mechanical mechanism is used to transmit the power of the servo motor 4 to adjust the distance between the suction belt and the trimming disk 9, the present application greatly reduces the transmission distance and improves the response speed by arranging the servo motor 4 at the upper part of the suction chamber 1 and the sliding rod 11 is arranged through the suction chamber 1.

[0040] As a preference, the connection between the sliding rod 11 and the suction chamber 1 in the embodiment is further limited, such as Figure 1 As shown, before the slide rod 11 is passed through the suction chamber 1, a sliding seat 8 is also provided on the top of the suction chamber 1. The slide rod 11 is connected to the suction ribbon pressure shoe 10 by being plugged into the sliding seat 8 and passed through the interior of the suction chamber 1. The sliding seat 8 serves to guide the slide rod 11 so that the slide rod 11 always maintains vertical up and down movement in the suction chamber 1 to avoid deviation and affect the height adjustment of the suction ribbon.

[0041] More preferably, the connection between the slide bar 11 and the suction chamber 1 in the embodiment is further limited, such as Figure 1 As shown, before the slide rod 11 is inserted into the slide seat 8, the rotation limit assembly 7 is also provided on the top of the slide seat 8, so that the slide rod 11 always maintains vertical up and down movement in the suction chamber 1, avoiding circular motion around the axis of the slide rod 11, which affects the height adjustment of the suction ribbon.

[0042] Furthermore, the specific structure of the rotation limiting assembly 7 in the embodiment is further defined. In this embodiment, the rotation limiting assembly 7 includes: a dovetail groove seat and a dovetail groove guide block;

[0043] The dovetail groove seat is arranged on the top of the sliding seat 8, and the sliding rod 11 is connected to the dovetail groove seat through the dovetail groove guide block and inserted into the sliding seat 8;

[0044] Through the structural design of the dovetail groove, the circular motion of the slide rod 11 can be effectively avoided, and the vertical up and down motion can always be maintained. In other embodiments, the rotation limiting structure can also be other shapes, as long as it can satisfy the limitation of the circumferential rotation freedom of the slide rod 11.

[0045] Preferably, the connection relationship between the components in this example is further limited. In this example, the U-shaped groove block 6 and the rotation limit component 7, the rotation limit component 7 and the slide rod 11, and the slide rod 11 and the suction belt pressing shoe 10 can be detachably connected to each other, which is convenient for disassembly, maintenance and replacement. At the same time, the slide rod 11 of different lengths can also be set according to different usage requirements.

[0046] More preferably, specifically, in the present embodiment, the U-shaped groove block 6 and the rotation limiting assembly 7, the rotation limiting assembly 7 and the slide rod 11, and the slide rod 11 and the suction belt pressing shoe 10 are specifically connected to each other through threaded screws; in other embodiments, the components can also be connected through snap-on, magnetic and other detachable connection methods.

[0047] Preferably, the specific selection of the servo motor 4 in this embodiment is further limited. In this embodiment, the servo motor 4 is specifically a servo motor with a built-in reducer, which can effectively increase the torque, so that the sector gear 2 can be driven by a lower number of teeth.

[0048] As a preferred embodiment, in this embodiment, Figure 1 As shown, a displacement sensor 5 is further provided on the servo mechanism housing 3 , and the displacement sensor 5 is used to detect the displacement of the sector gear 2 . The displacement sensor 5 is electrically connected to the servo motor 4 and can accurately digitize the movement of the slide rod 11 .

[0049] Preferably, the placement position of the servo motor 4 in this embodiment is further limited; in this example in this embodiment, the servo motor 4 is perpendicular to the servo mechanism case 3 and is flatly arranged on the outer surface of the servo mechanism case 3. By placing the servo motor 4 in this way, the steering direction of the servo motor 4 can be ensured, and the logical relationship of changing the relative height of the trimming disk 9 and the suction ribbon remains unchanged. For example, before the improvement, the motor rotates clockwise, and the connecting rod moves the trimming disk 9 assembly downward, and the weight of the cigarette increases; after the improvement, the servo motor 4 rotates clockwise, and the book search sector gear 2 drives the suction ribbon press shoe 10 to move upward, which also increases the weight of the cigarette.

[0050] Preferably, in order to better achieve electronic and intelligent control of the height of the suction belt pressing shoe 10, in this example, the control device provided in the present application also includes a control unit, and closed-loop control is achieved on the sector gear 2 and the servo motor 4 through the control unit and the displacement sensor 5;

[0051] Here, the control unit may be a programmable processing unit such as a PLC or a single chip microcomputer, which is used to process the electrical signal provided by the displacement sensor 5 and issue an action command to the servo motor 4.

[0052] The above description of the disclosed embodiments will enable one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not limited to the embodiments shown herein but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A device for controlling the weight of a cigarette by shifting a servo mechanism, characterized in that: include: Suction chamber (1), sector gear (2), servo mechanism housing (3), servo motor (4), U-shaped slot block (6), trimming plate (9), suction ribbon pressing shoe (10), slide rod (11); The top of the suction chamber (1) is provided with a servo mechanism housing (3) having a hollow structure, the sector gear (2) being provided inside the servo mechanism housing (3), and the servo motor (4) being provided outside the servo mechanism housing (3), with its output end being in gear meshing connection with the sector gear (2); A rotation hole is provided on the sector gear (2), and the sector gear (2) rotates around the rotation hole under the drive of the servo motor (4); The sector gear (2) is hingedly connected to the U-shaped groove block (6), and the U-shaped groove block (6) is used to convert the circular arc swinging motion of the sector gear (2) into an up-and-down linear motion; Inside the suction chamber (1), the sliding rod (11) and the suction belt pressing shoe (10) are vertically arranged, and the sliding rod (11) is connected to the U-shaped groove block (6); The servo motor (4) is controlled to drive the sector gear (2), thereby driving the suction wire pressing shoe (10) to move, thereby adjusting the height distance between the suction wire pressing shoe (10) and the trimming disc (9).

2. The device for controlling the weight of cigarettes by shifting a servo mechanism according to claim 1, characterized in that: A sliding seat (8) is also provided on the top of the suction chamber (1), and the sliding rod (11) is inserted into the sliding seat (8), penetrates the interior of the suction chamber (1), and is connected to the suction belt pressing shoe (10).

3. The device for controlling the weight of cigarettes by shifting a servo mechanism according to claim 2, characterized in that: A rotation limiting assembly (7) is also provided on the top of the sliding seat (8), and the sliding rod (11) is plugged into the sliding seat (8) via the rotation limiting assembly (7).

4. The device for controlling the weight of cigarettes by shifting a servo mechanism according to claim 3, characterized in that: The rotation limiting assembly (7) specifically comprises: a dovetail groove seat and a dovetail groove guide block; The dovetail groove seat is arranged on the top of the sliding seat (8), and the sliding rod (11) is connected to the dovetail groove seat through the dovetail groove guide block and inserted into the sliding seat (8).

5. The device for controlling the weight of a cigarette by shifting a servo mechanism according to claim 4, characterized in that: The U-shaped groove block (6) and the rotation limiting assembly (7), the rotation limiting assembly (7) and the slide bar (11), and the slide bar (11) and the suction belt pressing shoe (10) are all detachably connected to each other.

6. The device for controlling the weight of cigarettes by shifting a servo mechanism according to claim 5, characterized in that: The detachable connection is specifically: a threaded connection between each other via screws.

7. The device for controlling the weight of cigarettes by shifting a servo mechanism according to any one of claims 1 to 6, characterized in that: The servo motor (4) is specifically a servo motor with a built-in reducer.

8. The device for controlling the weight of a cigarette by shifting a servo mechanism according to claim 7, characterized in that: A displacement sensor (5) is also provided on the servo mechanism housing (3). The displacement sensor (5) is used to detect the displacement of the sector gear (2). The displacement sensor (5) is electrically connected to the servo motor (4).

9. The device for controlling the weight of cigarettes by shifting a servo mechanism according to claim 8, characterized in that: The servo motor (4) is perpendicular to the servo mechanism box (3) and is arranged flat on the outer surface of the servo mechanism box (3).

10. The device for controlling the weight of a cigarette by shifting a servo mechanism according to claim 9, characterized in that: It also includes a control unit, which implements closed-loop control of the sector gear (2) and the servo motor (4) through the control unit and the displacement sensor (5).

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