Tobacco leaf prepressing and weighing device

Abstract

The utility model belongs to the technical field of tobacco leaf metering and packaging, and particularly relates to a tobacco leaf pre-pressing and weighing device. A tobacco leaf pre-pressing weighing device comprises a rack, and a pre-pressing mechanism comprises a driving piece fixedly connected to the upper portion of the rack, a moving piece driven by the driving piece and a pre-pressing plate fixedly connected to the lower end of the moving piece. The weighing mechanism comprises a limiting block fixedly connected to the rack, a lifting frame arranged above the limiting block and the pre-pressing plate, a pulling-up plate arranged on the lower portion of the rack, a plurality of weighing sensors arranged on the pulling-up plate, and a connecting piece with the two ends connected with the lifting frame and the pulling-up plate respectively. The supporting mechanism comprises a supporting plate erected on the lower portion of the rack. When tobacco leaves are weighed, the pre-pressing plate drives the lifting frame to move upwards, so that the weighing sensor jacks the supporting plate; when the tobacco leaves are pre-pressed, the lifting frame abuts against the upper end face of the limiting block, and the weighing sensor is separated from the supporting plate. The tobacco leaf weighing and pressing device is simple in structure and low in cost, and tobacco leaves can be weighed and pressed through one driving piece.

Description

Technical Field

[0001] The utility model belongs to the technical field of tobacco leaf metering and packaging, and particularly relates to a tobacco leaf pre-pressing weighing device. Background Art

[0002] After the flue-cured tobacco leaves are purchased at the production base, they need to be weighed and compacted before the subsequent packaging process, so that they can be transported to the redrying plant for storage and redrying. Figure 1 The trolley is pushed to a weighing plate provided with a weighing sensor for weighing. After weighing, the tobacco leaves in the trolley are directly pre-pressed by a hydraulic mechanism, but this operation is easy to damage the weighing sensor. Alternatively, the trolley is pushed into another hydraulic pre-pressing mechanism for pre-pressing again, but this operation is labor-intensive.

[0003] In the prior art, for example, Chinese invention patent application number 201210120327.3 discloses a double hydraulic system tobacco weighing and packaging method and a tobacco weighing and packaging machine, which are composed of a frame, a packaging component, a tobacco weighing barrel, a weighing component and an operating component; the packaging component and the weighing component are respectively arranged on the upper and lower sides of the frame, the tobacco weighing barrel is arranged in the middle of the frame and on the upper side of the weighing component, and the operating component is arranged on the side of the frame; the method has the characteristics of high weighing accuracy, long service life, high efficiency, etc., and can be used for weighing and packaging tobacco, as well as for weighing and packaging other leaf materials or other compressible materials.

[0004] However, the above technology has the following technical problems: it needs to use two hydraulic systems, namely the driving parts composed of the baling cylinder and the weighing cylinder. The weighing cylinder is used to support the weighing sensor to weigh the tobacco leaves, and the baling cylinder drives the baling upper pressing plate to press down to press the tobacco leaves. The overall structure is relatively complex and the overall cost of the system is relatively high. Utility Model Content

[0005] In order to solve the technical problems existing in the prior art, the present application provides a tobacco leaf pre-pressing weighing device which has a simple structure, low cost and can achieve tobacco leaf weighing and pressing using only one driving component.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A tobacco leaf pre-pressing and weighing device comprises a frame and also comprises:

[0008] Pre-pressing mechanism: comprising a driving member fixedly connected to the upper part of the frame, a moving member driven by the driving member to move up and down, and a pre-pressing plate fixedly connected to the lower end of the moving member;

[0009] The weighing mechanism includes a limit block fixedly connected to the frame, a lifting frame arranged above the limit block and the pre-pressing plate, a pull-up plate arranged at the lower part of the frame, a plurality of weighing sensors fixedly connected to the pull-up plate, and a connecting piece with two ends respectively connected to the lifting frame and the pull-up plate;

[0010] Support mechanism: comprising a support plate mounted at the bottom of the frame;

[0011] When the tobacco leaves are weighed, the pre-pressing plate drives the lifting frame to move upward, so that the weighing sensor lifts the support plate; when the tobacco leaves are pre-pressed, the lifting frame abuts against the upper end surface of the limit block and the weighing sensor is separated from the support plate.

[0012] Preferably, the driving member includes a gear box fixedly connected to the upper part of the frame, two gears rotatably connected to the gear box and meshing with each other, and a reduction motor driving the gears to rotate; the moving member includes a pre-stress column vertically inserted in the gear box and respectively meshing with the two gears, and the pre-stress plate is fixedly connected to the lower end surfaces of the two pre-stress columns.

[0013] Preferably, two ends of the connecting plate are respectively fixedly connected to the upper end surfaces of the two pre-stressing columns.

[0014] Preferably, the connecting member includes a connecting chain whose two ends are respectively fixedly connected to the lifting frame and the lifting plate, a slide rail vertically fixedly connected to the frame, and a slider slidably mounted on the slide rail and fixedly connected to the lifting plate.

[0015] Preferably, the support plate includes a horizontally arranged base plate, vertical plates arranged on both sides of the base plate, and a lifting plate extending outward from the upper end surface of the vertical plates. A plurality of roller mounting frames are fixedly connected to the upper end surface of the base plate, and a plurality of rollers are rotatably connected to each of the roller mounting frames. The roller mounting frames can be mounted at the lower part of the frame.

[0016] Preferably, a guide plate is fixedly connected to each of the two lifting plates, and one end of the guide plate is smoothly bent toward the outside thereof.

[0017] Preferably, an inclined transition plate is fixedly connected to one side of the bottom of the frame.

[0018] Compared with the prior art, the beneficial effects of the utility model are:

[0019] When the tobacco leaves are not weighed and pre-pressed, the lifting frame of the weighing mechanism is supported by the limit block. At this time, the weighing sensor is out of contact with the support plate, thereby avoiding continuous pressure on the weighing sensor, which causes a decrease in its accuracy or even damage. When the tobacco leaves are weighed, the driving member drives the moving member to drive the pre-pressing plate to rise, and the pre-pressing plate drives the lifting frame to rise, and the weighing sensor drives the support plate to rise, thereby realizing the weighing of the tobacco leaves in the cart. When the tobacco leaves are pre-pressed, the driving member drives the moving member to drive the pre-pressing plate to descend, and the lifting frame is supported by the limit block again, the weighing sensor is out of contact with the support plate, and the pre-pressing plate continues to move downward to complete the pressing of the tobacco leaves. During the pressing process, the weighing sensor is out of contact with the support plate, thereby avoiding damage to the weighing sensor due to pressure. Therefore, the present invention has a simple structure, low cost and can realize tobacco weighing and pressing with only one driving member.

[0020] By setting up a pre-pressing mechanism including a gear box, gears, a reduction motor, a pre-pressing column and a pre-pressing plate, the structure is simple, the cost is low and no hydraulic system is required. In addition, it is also convenient to adjust the pre-pressing degree of the tobacco leaves by adjusting the downward pressing distance of the pre-pressing plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the structure of the utility model when working.

[0022] Figure 2 It is a schematic diagram of the overall structure of the utility model.

[0023] Figure 3 For Figure 2 The left view structure diagram is based on the reference.

[0024] Figure 4 For Figure 2 Schematic diagram of the front view structure based on the reference.

[0025] Figure 5 It is a schematic diagram of the connection structure of the frame and the weighing mechanism of the utility model.

[0026] Figure 6 It is a structural schematic diagram of the pre-pressing mechanism and the weighing mechanism of the utility model.

[0027] Figure 7 It is a structural schematic diagram of the pre-pressing mechanism of the utility model.

[0028] Figure 8 It is a structural schematic diagram of the support mechanism of the utility model.

[0029] In the figure: 1, frame, 11, vertical frame, 12, bottom frame, 13, top frame, 14, connecting frame,

[0030] 2. Preloading mechanism, 21. Preloading plate, 22. Gear box, 23. Gear, 24. Speed ​​reduction motor, 25. Preloading column,

[0031] 3. Weighing mechanism, 31. Limit block, 32. Lifting frame, 33. Pull-up plate, 34. Weighing sensor, 35. Connecting chain, 36. Slide rail, 37. Slider,

[0032] 4. Support mechanism, 41. Support plate, 411. Bottom plate, 412. Vertical plate, 413. Lifting plate, 42. Roller mounting frame, 43. Roller, 44. Guide plate, 45. Transition plate,

[0033] 5. Push the cart. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of them. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0035] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention. Example

[0036] See attached Figure 1 , 2 As shown in Figures 3 and 4, a tobacco leaf pre-pressing and weighing device comprises a frame 1, a pre-pressing mechanism 2 for pre-pressing the tobacco leaves in the cart 5, a weighing mechanism 3 for weighing the tobacco leaves in the cart 5, a supporting mechanism 4 for supporting the cart 5, and a control device (not shown in the figure).

[0037] See also Figure 5 As shown, the frame 1 includes four vertical frames 11 arranged vertically, a rectangular bottom frame 12 welded at the lower end of the vertical frame 11 or connected by bolts, a rectangular top frame 13 welded at the upper end of the vertical frame 11 or connected by bolts, and a connecting frame 14 welded on the upper part of the vertical frame 11 below the top frame 13, and the preloading mechanism 2 is fixedly mounted on the connecting frame 14.

[0038] See also Figure 6 ,7 As shown, the prestressing mechanism 2 includes a driving member fixedly connected to the upper part of the frame 1, a movable member driven up and down by the driving member, and a prestressing plate 21 fixedly connected to the lower end of the movable member. In other embodiments, the driving member may be a hydraulic cylinder, and the movable member may be a telescopic rod of the hydraulic cylinder.

[0039] However, in this embodiment, in order to avoid setting up a hydraulic system to simplify the structure and facilitate the adjustment of the pre-pressing stroke of the tobacco leaves, the driving member includes a gear box 22 fixedly connected to the connecting frame 14 by bolts, two gears 23 rotatably connected to the gear box 22 and meshing with each other through a rotating shaft and a corresponding rotating bearing (not shown in the figure) fixed in the gear box 22, and a reduction motor 24 that drives the gear 23 to rotate. The reduction motor 24 includes a motor and a reduction box connected to the output shaft of the motor, and the output shaft of the reduction box drives a certain gear 23 to rotate through a coupling.

[0040] The moving part includes a pre-stress column 25 which is vertically inserted into the gear box 22 and meshed with the two gears 23 respectively. The pre-stress column 25 is a cylindrical structure and has a toothed structure which can mesh with the gear 23 on the outer circumference opposite to the gear 23. The pre-stress plate 21 is fixedly connected to the lower end surfaces of the two pre-stress columns 25 by bolts. The rotation of the gear 23 can drive the pre-stress column 25 and the pre-stress plate 21 to rise or fall.

[0041] Furthermore, both ends of the connecting plate 26 are fixedly connected to the upper end surfaces of the two pre-stressing columns 25 by bolts, so as to improve the connection strength between the two pre-stressing columns 25 and the gear 23 when the two pre-stressing columns 25 move up and down.

[0042] See also Figure 5 , 6 As shown, the weighing mechanism 3 includes four limit blocks 31 welded on the vertical frame 11 below the connecting frame 14, a lifting frame 32 arranged above the limit blocks 31 and the pre-load plate 21, a pulling plate 33 horizontally arranged at the lower part of the vertical frame 11 of the frame 1, a plurality of weighing sensors 34 fixedly connected to the upper end surface of the pulling plate 33 by bolts, and connecting parts respectively connected to the lifting frame 32 and the pulling plate 33 at both ends.

[0043] Specifically, two weighing sensors 34 are installed on each lifting plate 33. The lifting frame 32 can be separated from the limit block 31 and move upward under the drive of the pre-pressing plate 21, thereby driving the connecting member, the lifting plate 33, and the weighing sensor 4 to move upward. In this embodiment, the connecting member includes a connecting chain 35 whose two ends are fixedly connected to the lifting frame 32 and the lifting plate 33 by a pin structure, a slide rail 36 vertically fixedly connected to the lower part of the vertical frame 11 of the frame 1 by bolts, and a slider 37 slidably arranged on the slide rail 36 and fixedly connected to the lifting plate 33 by bolts. The slide rail 36 and the slider 37 are provided to guide the lifting plate 33 when it is lifted.

[0044] See also Figure 2 , 8 As shown, the support mechanism 4 includes a support plate 41 mounted on the lower part of the frame 1. Specifically, the support plate 41 includes a horizontally arranged bottom plate 411, vertical plates 412 vertically fixedly connected on both sides of the bottom plate 411, and a lifting plate 413 formed by extending outward on the upper end surface of the vertical plate 412. The lifting plate 413 is arranged above the weighing sensor 34, and the bottom plate 411 is arranged above the hollow structure in the middle of the inner side of the bottom frame 12. A plurality of roller mounting frames 42 are fixedly connected to the upper end surface of the bottom plate 411 by bolts. In the present embodiment, three roller mounting frames 42 are arranged, and a plurality of rollers 43 are rotatably connected to each roller mounting frame 42 by a rotating pin shaft. When the lifting plate 33 is not lifted, the lower end surface of the roller mounting frame 42 is mounted on the bottom frame 12.

[0045] In order to facilitate pushing the cart 5 loaded with tobacco leaves onto the roller 43 on the support plate 41, guide plates 44 are fixedly connected to the two lifting plates 413 by bolts, one end of the guide plate 44 is smoothly bent toward the outside thereof, and in addition, an inclined transition plate 45 is fixedly connected to one side of the bottom frame 12. The bent end of the guide plate 44 and the end where the transition plate 45 is set are both the sides where the cart is pushed in.

[0046] Furthermore, in order to improve the automation level of the pre-stressing weighing device, a proximity sensor (not shown in the figure) can be installed on the vertical frame 11 in the pushing direction of the cart 5, and a positioning mechanism (not shown in the figure) can be installed on the vertical frame 11 in the pushing direction of the cart 5. When the cart 5 is pushed in, the proximity sensor is triggered and the positioning mechanism blocks and positions the cart 5. The proximity sensor and the positioning mechanism can be connected to the control device and the existing technology can be selected.

[0047] The working process of the embodiment of the utility model is as follows:

[0048] In the initial state, the lifting frame 32 is supported by the limit block 31, the pre-pressing plate 21 moves to the bottom of the lifting frame 32, the weighing sensor 34 is out of contact with the lifting plate 413, and the roller mounting frame 42 is mounted on the bottom frame 12 to support the support plate 41;

[0049] When weighing tobacco leaves, the cart 5 loaded with tobacco leaves is pushed from the transition plate 45 to the roller 43 on the support plate 41, and the reduction motor 24 drives the gear 23 to rotate, thereby driving the pre-pressing column 25 and the pre-pressing plate 21 to rise. In this process, the pre-pressing plate 21 rises and abuts against the lifting frame 32 and continues to drive the lifting frame 32 to rise, thereby driving the connecting chain 35, the lifting plate 33, and the weighing sensor 34 to rise. The weighing sensor 34 abuts against the lifting plate 413 and drives the support plate 41 and the cart 5 to rise. At this time, the tobacco leaves in the cart 5 can be weighed by the weighing sensor 34;

[0050] When pre-pressing tobacco leaves, the reduction motor 24 drives the gear 23 to reverse, so that the pre-pressing column 25 and the pre-pressing plate 21 are lowered until the pre-pressing plate 25 is separated from the lifting frame 32. At this time, the lifting frame 32 is supported by the limit block 31, the weighing sensor 34 is separated from the lifting plate 413, and the roller mounting frame 42 is mounted on the bottom frame 12, thereby supporting the support plate 41 and the trolley 5 thereon; thereafter, the pre-pressing plate 21 continues to descend into the trolley 5 to pre-press the tobacco leaves in the trolley 5;

[0051] After the pre-pressing of the tobacco leaves is completed, the reduction motor 24 drives the pre-pressing plate 21 to return to the initial state, after which the operator can push the cart 5 out from the side away from the transition plate 45 .

[0052] In this process, the control device connects and controls the reduction motor 24, the weighing sensor 34 and other components. The automation level of the utility model is realized by setting up the control device. The connection method and control principle of the control device and the above components are existing technologies and will not be repeated here. It is sufficient as long as the above working process can be realized.

[0053] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A tobacco leaf pre-pressing weighing device, comprising a frame, characterized in that: Also includes: Pre-pressing mechanism: comprising a driving member fixedly connected to the upper part of the frame, a moving member driven by the driving member to move up and down, and a pre-pressing plate fixedly connected to the lower end of the moving member; The weighing mechanism includes a limit block fixedly connected to the frame, a lifting frame arranged above the limit block and the pre-pressing plate, a pull-up plate arranged at the lower part of the frame, a plurality of weighing sensors fixedly connected to the pull-up plate, and a connecting piece with two ends respectively connected to the lifting frame and the pull-up plate; Support mechanism: comprising a support plate mounted at the bottom of the frame; When the tobacco leaves are weighed, the pre-pressing plate drives the lifting frame to move upward, so that the weighing sensor lifts the supporting plate; When the tobacco leaves are pre-pressed, the lifting frame abuts against the upper end surface of the limit block and the weighing sensor is separated from the support plate.

2. A tobacco leaf pre-pressing weighing device according to claim 1, characterized in that: The driving member includes a gear box fixedly connected to the upper part of the frame, two gears rotatably connected to the gear box and meshing with each other, and a reduction motor driving the gears to rotate; the moving member includes a pre-stressing column vertically inserted in the gear box and respectively meshing with the two gears, and the pre-stressing plate is fixedly connected to the lower end surfaces of the two pre-stressing columns.

3. A tobacco leaf pre-pressing weighing device according to claim 2, characterized in that: The two ends of the connecting plate are respectively fixedly connected to the upper end surfaces of the two pre-stressing columns.

4. The tobacco leaf pre-pressing weighing device according to claim 1, characterized in that: The connecting member includes a connecting chain whose two ends are respectively fixedly connected to the lifting frame and the lifting plate, a slide rail vertically fixedly connected to the frame, and a slider slidably arranged on the slide rail and fixedly connected to the lifting plate.

5. The tobacco leaf pre-pressing weighing device according to claim 1, characterized in that: The support plate includes a horizontally arranged bottom plate, vertical plates arranged vertically on both sides of the bottom plate, and a lifting plate extending outward from the upper end surface of the vertical plate. A plurality of roller mounting frames are fixedly connected to the upper end surface of the bottom plate, and a plurality of rollers are rotatably connected to each of the roller mounting frames. The roller mounting frames can be mounted at the lower part of the frame.

6. A tobacco leaf pre-pressing weighing device according to claim 5, characterized in that: A guide plate is fixedly connected to the two lifting plates respectively, and one end of the guide plate is smoothly bent toward the outside thereof.

7. The tobacco leaf pre-pressing weighing device according to claim 1, characterized in that: A transition plate arranged obliquely is fixedly connected to one side of the bottom of the frame.

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