Electronic belt scale eccentric belt tensioner and method

Abstract

The application discloses an electronic belt scale eccentric swing type belt tensioning device and method, and relates to the technical field of electronic belt scales, which comprises a first straight rod rotatably connected to the side wall of a frame, a rack slidably arranged on the first straight rod along the axial direction of the first straight rod, and a tensioning wheel rotatably connected to the rack. The electronic belt scale eccentric swing type belt tensioning device and method can drive the first straight rod to swing through the first transmission assembly, drive the rack to slide along the axial direction of the first straight rod through the second transmission assembly, and limit the rotation of the driven roller through the cooperation between the brake assembly and the driven roller, so that the belt can be quickly braked, the belt can be quickly stopped, and the deviation of the conveying direction of the material caused by the deviation of the belt can be avoided.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electronic belt scale, in particular to an electronic belt scale eccentric swing type belt tensioning device and method. BACKGROUND

[0002] The scale frame structure of the electronic belt scale bearing device mainly has four types of double-lever multi-roller type, single-roller type, cantilever type and suspension type. The electronic belt scale measurement section of the double-lever multi-roller type and the suspension type scale frame is relatively long, generally 2-8 groups of rollers, the measurement accuracy is high, and it is suitable for places with large flow and high measurement accuracy requirements. The belt speed of the electronic belt scale with single-roller type and cantilever type scale frame can be determined by the manufacturer, and it is suitable for places with small flow or places for controlling flow batching.

[0003] For example, the Chinese patent CN101726347B entitled "Electronic belt scale eccentric swing type belt tensioning device" includes a tensioning frame mounted on both ends of the driven roller of the electronic belt scale and located between the upper and lower belts, two machine side plates symmetrically arranged on the outer sides of the tensioning frame, and a connecting rod mechanism installed on the machine side plates. The connecting rod mechanism is sequentially connected by a base, a first connecting rod, a second connecting rod, and an eccentric swing plate. The base is fixed to the machine side plate, the first connecting rod is hinged to the base through a first rotating shaft, the second connecting rod is hinged to the first connecting rod through a second rotating shaft, and the eccentric swing plate is hinged to the second connecting rod through a third rotating shaft and to the machine side plate through a fourth rotating shaft. A locking bolt is provided on the eccentric swing plate, and a wrench is installed on the second connecting rod. The eccentric swing plate is also connected to the tensioning frame through a first bearing, and the tensioning frame is connected to the center shaft of the driven roller through a second bearing. The above patent solves the problems of not being able to adjust the tensioning force in real time, not being able to adjust the tensioning force of each part of the belt cross section, and not being able to adjust the tensioning force of the belt.

[0004] The above patent has the following disadvantages: After the electronic belt scale is used for a long time, the belt will inevitably deviate during the process of conveying the material. If the deviated belt is not adjusted, it will easily cause the conveying direction of the material to deviate during the process of conveying the material by the belt. The above patent does not have the function of quickly stopping the belt, so when the belt deviates, it needs to wait for the belt to completely stop before adjusting the position of the belt. Therefore, not only does it affect the adjustment of the belt, but it also affects the use of the electronic belt scale to some extent. SUMMARY

[0005] The purpose of the present application is to provide an electronic belt scale eccentric swing type belt tensioning device and method to solve the above-mentioned problems in the prior art.

[0006] In order to achieve the above object, the present application provides the following technical scheme: an electronic belt scale eccentricity type belt tensioning device, the electronic belt scale comprising a rack and a driving roller and a driven roller rotatably arranged on the rack, and a belt slidingly sleeved on the driving roller and the driven roller; comprising: a first straight rod rotatably connected to the side wall of the rack; a rack slidingly arranged on the first straight rod along the axial direction of the first straight rod; a tensioning wheel rotatably connected to the rack and rolling against the inner side of the belt to tension the belt; a first transmission assembly driven by a driving unit to swing the first straight rod; a second transmission assembly driven by the driving unit to slide the rack along the first straight rod; and a brake assembly arranged on the first straight rod, the brake assembly having a brake station opposite to the driven roller during the swinging of the first straight rod.

[0007] Further, the first transmission assembly comprises a second motor fixedly installed on the rack, and the output end of the second motor is fixedly connected with a first pulley; the first transmission assembly further comprises a first rotating rod rotatably arranged on the rack, and the peripheral surface of the first rotating rod is fixedly installed with a second pulley; the first pulley and the second pulley are transmissionally connected through a first transmission belt.

[0008] Further, the second transmission assembly comprises a second rotating rod rotatably arranged on the rack, and the peripheral surface of the second rotating rod is fixedly installed with a second gear; the peripheral surface of the first rotating rod is engaged with a first gear engaged with the second gear; the peripheral surface of the second rotating rod is further fixedly installed with a third pulley; a connecting seat is further fixedly installed on the rack, and a second straight rod is rotatably connected to the connecting seat; a sliding shaft is slidingly arranged on the second straight rod; one end of the sliding shaft is fixedly installed with a fourth pulley; the third pulley and the fourth pulley are transmissionally connected through a second transmission belt; a sliding block is rotatably arranged on the peripheral surface of the sliding shaft, and the sliding block is slidingly arranged on the second straight rod; a first elastic member is arranged between the sliding block and the second straight rod; a connecting frame is fixedly installed on the sliding block, and a third gear engaged with the rack is arranged on the connecting frame; a clutch assembly is arranged between the sliding block and the connecting frame.

[0009] Further, a first connecting rail is fixedly connected to the second straight rod, a first connecting sliding block is slidingly arranged on the first connecting rail, a second connecting sliding block is rotatably connected to the first connecting sliding block, a second connecting rail is slidingly arranged on the second connecting sliding block, and the second connecting rail is fixedly installed on the first straight rod.

[0010] Further, the clutch assembly comprises an electric push rod fixedly installed on the connecting frame, and an output end of the electric push rod is rotationally provided with a connecting shaft opposite to the sliding shaft, and the third gear is fixedly installed on the peripheral surface of the connecting shaft.

[0011] Further, one end of the connecting shaft close to the sliding shaft is fixedly connected with a butt joint block, and one end of the sliding shaft close to the connecting shaft is provided with a butt joint groove matched with the butt joint block.

[0012] Further, the first elastic member is a compression spring, one end of the compression spring is fixedly connected with the sliding block, and the other end is fixedly arranged on the second straight rod through a connecting plate.

[0013] Further, the brake assembly comprises a rotating seat rotationally connected with the first straight rod, the rotating seat is slidably provided with a movable plate, a second elastic member is arranged between the movable plate and the rotating seat, a chuck is fixedly installed on the movable plate, and a plurality of clamping pins are fixedly installed on the chuck; an abutting disc is fixedly connected with the end surface of the driven roller, and a plurality of arc-shaped clamping grooves matched with the clamping pins are formed in the abutting disc.

[0014] Further, the second elastic member is a spring, and two ends of the spring are fixedly connected with the rotating seat and the movable plate respectively; a limiting rod is fixedly connected with the rotating seat, the movable plate is slidably sleeved on the limiting rod, and the spring is sleeved on the limiting rod.

[0015] An electronic belt scale eccentric swing type belt tensioning method is used for the electronic belt scale eccentric swing type belt tensioning device in any one of claims 1 to 9, and comprises the following steps: S1, starting a driving unit, the driving unit drives the first straight rod to rotate close to the driven roller through a first transmission assembly; S2, the driving unit drives the rack to slide along the first straight rod to tension the belt through a second transmission assembly; S3, the rotating rod drives the brake assembly to abut against the driven roller, the driving unit is turned off, and the brake assembly stops the driven roller and the belt.

[0016] In the above technical solution, the electronic belt scale eccentric swing type belt tensioning device has the following beneficial effects: the active roller, the driven roller and the belt arranged on the frame are used to achieve the effect that the electronic belt scale can be used to convey materials; and the tensioning wheel is used to achieve the effect that the slack belt can be tensioned.

[0017] By utilizing the first transmission assembly to drive the first straight rod to swing, the second transmission assembly to drive the rack to slide along the axial direction of the first straight rod, and by utilizing the cooperation between the brake assembly and the driven roller, when the belt deviates during operation, the driven roller can be limited to rotate, the belt can be quickly braked, and the deviation of the conveying direction of the material caused by the deviation of the belt can be avoided. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments will be briefly introduced. Obviously, the drawings in the following description are only some embodiments described in the present application, and other drawings can also be obtained by those skilled in the art according to these drawings.

[0019] Figure 1 The overall structural schematic diagram provided by the embodiment of the present application is shown in the figure.

[0020] Figure 2 The overall structural schematic diagram provided by the embodiment of the present application is shown in the figure. Figure 1 The structural schematic diagram of A in the figure is shown in the figure.

[0021] Figure 3 The overall structural schematic diagram provided by the embodiment of the present application is shown in the figure. Figure 1 The structural schematic diagram of B in the figure is shown in the figure.

[0022] Figure 4 The overall structural schematic diagram provided by the embodiment of the present application is shown in the figure. Figure 1 The partial structural schematic diagram of the figure is shown in the figure.

[0023] Figure 5 The overall structural schematic diagram provided by the embodiment of the present application is shown in the figure. Figure 4 The structural schematic diagram of C in the figure is shown in the figure.

[0024] Figure 6 The overall structural schematic diagram provided by the embodiment of the present application is shown in the figure. Figure 4 The structural schematic diagram of D in the figure is shown in the figure.

[0025] Figure 7 The overall structural schematic diagram provided by the embodiment of the present application is shown in the figure. Figure 4 The structural schematic diagram of E in the figure is shown in the figure.

[0026] Figure 8 The overall structural schematic diagram provided by the embodiment of the present application is shown in the figure. Figure 1 The partial disassembly structural schematic diagram of the second straight rod in the figure is shown in the figure.

[0027] Figure 9 The overall structural schematic diagram provided by the embodiment of the present application is shown in the figure. Figure 8 The side view structural schematic diagram of the figure is shown in the figure.

[0028] Figure 10 The overall structural schematic diagram provided by the embodiment of the present application is shown in the figure.Figure 9 Structure diagram of the structure at F;

[0029] Figure 11 Structure diagram of the brake assembly provided by the embodiment of the present application; Figure 4 Structure diagram of the brake assembly provided by the embodiment of the present application;

[0030] Figure 12 Structure diagram of the brake assembly provided by the embodiment of the present application; Figure 4 Structure diagram of the first straight rod provided by the embodiment of the present application;

[0031] Figure 13 Structure diagram of the brake assembly provided by the embodiment of the present application; Figure 12 Structure diagram of the brake assembly provided by the embodiment of the present application;

[0032] Figure 14 Structure diagram of the brake assembly provided by the embodiment of the present application; Figure 13 Structure diagram of the structure at G.

[0033] Explanation of reference signs:

[0034] 1, rack; 2, first motor; 3, driving roller; 4, driven roller; 5, belt; 601, first rotating rod; 602, first straight rod; 603, guide rail; 604, rack; 605, tension pulley; 606, second motor; 607, first pulley; 608, second pulley; 609, first transmission belt; 610, first gear; 611, second rotating rod; 612, second gear; 613, third pulley; 614, connecting seat; 615, second straight rod; 6151, first connecting rail; 6152, first connecting sliding block; 6153, second connecting sliding block; 6154, second connecting rail; 616, through hole; 617, sliding shaft; 618, fourth pulley; 619, second transmission belt; 620, sliding block; 621, first elastic member; 622, connecting plate; 623, connecting frame; 624, electric push rod; 625, connecting shaft; 626, third gear; 627, butt joint block; 628, butt joint groove; 71, rotating seat; 72, movable plate; 73, second elastic member; 74, chuck; 75, clamping pin; 76, butt joint disc; 77, arc-shaped clamping groove; 78, limiting rod. DETAILED DESCRIPTION

[0035] In order to make the technical personnel in the art better understand the technical solutions of the present application, the present application will be further described in detail below with reference to the drawings.

[0036] Please refer to Figures 1-14The electronic belt scale eccentric swing type belt tensioning device provided by the embodiment of the present application, the electronic belt scale comprising a rack 1 and a driving roller 3 and a driven roller 4 rotatably arranged on the rack 1, and a belt 5 slidingly sleeved on the driving roller 3 and the driven roller 4; comprising: a first straight rod 602 rotatably connected to the side wall of the rack 1; a rack 604 slidingly arranged on the first straight rod 602 along the axial direction of the first straight rod 602; a tensioning wheel 605 rotatably connected to the rack 604 and rolling against the inner side of the belt 5 to tension the belt 5; a first transmission assembly driven by a driving unit to swing the first straight rod 602; a second transmission assembly driven by the driving unit to slide the rack 604 along the first straight rod 602; and a brake assembly arranged on the first straight rod 602, the brake assembly having a brake position opposite to the driven roller 4 during the swinging of the first straight rod 602.

[0037] Specifically, a first motor 2 is fixedly installed on the rack 1, and the driving roller 3 is fixedly installed on the output end of the first motor 2; by using the first motor 2, the driving roller 3 can rotate under the action of the first motor 2, and at this time, through the cooperation between the driving roller 3 and the driven roller 4, the belt 5 can slide on the driving roller 3 and the driven roller 4, thereby achieving the effect of conveying the material.

[0038] Specifically, a guide rail 603 is fixedly installed on the first straight rod 602, and the rack 604 is slidingly connected to the guide rail 603; by using the guide rail 603 on the first straight rod 602, the sliding direction of the rack 604 and the maximum distance that the rack 604 can slide are limited.

[0039] In the above technical solution, the electronic belt scale eccentric swing type belt tensioning device provided by the present application uses the driving roller 3, the driven roller 4 and the belt 5 arranged on the rack 1 to achieve the effect of conveying the material by means of the electronic belt scale; by using the tensioning wheel 605, the effect of tensioning the slack belt 5 is achieved; by using the first transmission assembly to drive the first straight rod 602 to swing and the second transmission assembly to drive the rack 604 to slide along the axial direction of the first straight rod 602, and by using the cooperation between the brake assembly and the driven roller 4, when the belt 5 deviates during operation, the rotation of the driven roller 4 can be limited to quickly brake the belt 5, and by quickly stopping the belt 5, the deviation of the conveying direction of the material caused by the deviation of the belt 5 can be avoided as much as possible.

[0040] As the preferred technical scheme of the embodiment, the first transmission assembly comprises a second motor 606 fixedly installed on the rack 1, and an output end of the second motor 606 is fixedly connected with a first belt pulley 607; the first transmission assembly further comprises a first rotating rod 601 rotatably arranged on the rack 1, a first straight rod 602 is fixedly installed on an end face of the first rotating rod 601, a second belt pulley 608 is fixedly installed on a circumferential surface of the first rotating rod 601, and the first belt pulley 607 and the second belt pulley 608 are drivingly connected through a first transmission belt 609.

[0041] In the above technical scheme, the first belt pulley 607 can rotate under the action of the second motor 606, the first rotating rod 601 can rotate under the driving of the second belt pulley 608 through the first belt pulley 607, the second belt pulley 608 and the first transmission belt 609, and the first straight rod 602 can swing under the driving of the first rotating rod 601.

[0042] As the preferred technical scheme of the embodiment, the second transmission assembly comprises a second rotating rod 611 rotatably arranged on the rack 1, a second gear 612 is fixedly installed on a circumferential surface of the second rotating rod 611, a first gear 610 meshing with the second gear 612 is meshed on a circumferential surface of the first rotating rod 601, and a third belt pulley 613 is fixedly installed on the circumferential surface of the second rotating rod 611; a connecting seat 614 is further fixedly installed on the rack 1, a second straight rod 615 is rotatably connected to the connecting seat 614, a sliding shaft 617 is slidingly arranged on the second straight rod 615, a fourth belt pulley 618 is fixedly installed on one end of the sliding shaft 617, and the third belt pulley 613 and the fourth belt pulley 618 are drivingly connected through a second transmission belt 619; a sliding block 620 is rotatably arranged on a circumferential surface of the sliding shaft 617, the sliding block 620 is slidingly arranged on the second straight rod 615, and a first elastic member 621 is arranged between the sliding block 620 and the second straight rod 615; a connecting frame 623 is fixedly installed on the sliding block 620, a third gear 626 meshing with the rack 604 is arranged on the connecting frame 623; and a clutch assembly is arranged between the sliding block 620 and the connecting frame 623.

[0043] Specifically, a through hole 616 is formed in the second straight rod 615, and the sliding shaft 617 is movably arranged in the through hole 616; by utilizing the through hole 616 formed in the second straight rod 615, the sliding direction of the sliding shaft 617 can be limited.

[0044] In the above technical scheme, while the first rotating rod 601 swings under the action of the first transmission assembly, the first gear 610 on the first rotating rod 601 is used to cooperate with the second gear 612 on the second rotating rod 611, thereby driving the second rotating rod 611 to rotate. (It is worth mentioning that the number of teeth of the first gear 610 and the number of teeth of the second gear 612 have a certain number difference, so that the first gear 610 can drive the second gear 612 to rotate several turns while rotating a certain angle), while the first straight rod 602 swings, the second straight rod 615 on the connecting seat 614 is driven to swing under the action of the first straight rod 602, and while the second straight rod 615 swings, the sliding shaft 617 can slide along the length direction of the second straight rod 615, and during the entire sliding process of the sliding shaft 617, the sliding shaft 617 can rotate under the action of the third belt pulley 613, the fourth belt pulley 618 and the second transmission belt 619. Therefore, at this time, by means of the clutch assembly, the abutting shaft on the third gear 626 can be connected with the abutting shaft, so that when the teeth of the third gear 626 and the teeth of the rack 604 are engaged, the third gear 626 can rotate under the sliding rotation drive, and by means of the cooperation between the third gear 626 and the rack 604, when the first straight rod 602 swings towards the direction of the driven roller 4, the rack 604 can slide along the length direction of the first straight rod 602. Therefore, during the swinging of the first straight rod 602, the tensioning wheel 605 can roll against the inner side of the belt 5, so as to tension the belt 5, thereby achieving the effect that the rack 604 can slide along the length direction of the first straight rod 602 while the first straight rod 602 swings,

[0045] As a preferred technical scheme of the present embodiment, the second straight rod 615 is fixedly connected with a first connecting rail 6151, the first connecting rail 6151 is slidably provided with a first connecting sliding block 6152, the first connecting sliding block 6152 is rotatably connected with a second connecting sliding block 6153, and the second connecting sliding block 6153 is slidably provided with a second connecting rail 6154. The second connecting rail 6154 is fixedly installed on the first straight rod 602.

[0046] In the above technical scheme, by using the first connecting sliding block 6152 on the first connecting rail 6151 and the second connecting sliding block 6153 on the second connecting rail 6154, the effect that the first straight rod 602 can indirectly drive the second straight rod 615 on the connecting seat 614 to swing while the first straight rod 602 swings is achieved.

[0047] As the preferred technical scheme of the embodiment, the clutch assembly comprises an electric push rod 624 fixedly installed on the connecting frame 623, and an output end of the electric push rod 624 is rotationally provided with a connecting shaft 625 opposite to the sliding shaft 617, and the third gear 626 is fixedly installed on the peripheral surface of the connecting shaft 625.

[0048] In the above technical scheme, by using the clutch assembly, when the first straight rod 602 is swinging and the position of the rack 604 needs to be adjusted, the third gear 626 on the connecting shaft can be moved to the direction close to the rack 604 under the action of the electric push rod 624 on the connecting frame 623, so that the connecting shaft on the third gear 626 can be connected with the sliding shaft 617. At this time, the sliding shaft 617 is rotated under the action of the third belt pulley 613, the fourth belt pulley 618 and the second transmission, so that the third gear 626 is rotated under the action of the sliding shaft 617 after the connecting shaft on the third gear 626 is connected with the sliding shaft 617. Therefore, the rack 604 can slide along the length direction of the first straight rod 602 by the cooperation between the third gear 626 and the rack 604.

[0049] As the preferred technical scheme of the embodiment, the connecting shaft 625 is fixedly connected with an adapter block 627 at one end close to the sliding shaft 617, and the sliding shaft 617 is provided with an adapter groove 628 adapted to the adapter block 627 at one end close to the connecting shaft 625.

[0050] In the above technical scheme, by using the adapter block 627 on the sliding shaft 617 and the adapter groove 628 on the sliding shaft 617, after the connecting shaft is moved to the specified position under the action of the electric push rod 624, the adapter block 627 on the connecting shaft is clamped into the adapter groove 628 on the sliding shaft 617, so that the connecting shaft on the third gear 626 can rotate with the sliding shaft 617 under the abutting action of the adapter block 627 while the sliding shaft 617 is rotating.

[0051] As the preferred technical scheme of the embodiment, the first elastic member 621 is a compression spring, one end of the compression spring is fixedly connected to the sliding block 620, and the other end is fixedly arranged on the second straight rod 615 through the connecting plate 622.

[0052] In the technical scheme, the sliding block 620 on the second straight rod 615 can slide away from the connecting seat 614 along the length direction of the second straight rod 615 when the first straight rod 602 swings downward, and the compression spring is compressed at this time; and the sliding block 620 on the second straight rod 615 can slide reversely along the length direction of the second straight rod 615 under the action of the elastic force of the compression spring when the first straight rod 602 swings upward, so that the third gear 626 and the rack 604 can be engaged no matter how the first straight rod 602 and the second straight rod 615 swing,

[0053] As the preferred technical scheme of the embodiment, the brake assembly comprises a rotating seat 71 rotatably connected to the first straight rod 602, a movable plate 72 slidably arranged on the rotating seat 71, a second elastic member 73 arranged between the movable plate 72 and the rotating seat 71, a chuck 74 fixedly installed on the movable plate 72, and a plurality of clamping pins 75 fixedly installed on the chuck 74. An adapter disc 76 is fixedly connected to the end face of the driven roller 4, and a plurality of arc-shaped clamping grooves 77 matched with the clamping pins 75 are formed in the adapter disc 76.

[0054] Specifically, the side of the chuck 74 and the side of the adapter disc 76 close to each other are chamfered.

[0055] In the technical scheme, when the first straight rod 602 swings upward and the chuck 74 contacts the adapter disc 76, the chuck 74 can slide under the extrusion of the adapter disc 76 by using the chamfer of the chuck 74 and the adapter disc 76, and the chuck 74 can be connected to the adapter disc 76 by using the second elastic member 73 when the first straight rod 602 rotates to a proper position, so that the plurality of clamping pins 75 arranged on the chuck 74 can be inserted into the corresponding arc-shaped clamping grooves 77 formed in the adapter disc 76, and the rotation of the driven roller 4 can be limited by the cooperation between the clamping pins 75 and the arc-shaped clamping grooves 77.

[0056] As the preferred technical scheme of the embodiment, the second elastic member 73 is a spring, and the two ends of the spring are fixedly connected to the rotating seat 71 and the movable plate 72, respectively. A limiting rod 78 is fixedly connected to the rotating seat 71, the movable plate 72 is slidably sleeved on the limiting rod 78, and the spring is sleeved on the limiting rod 78.

[0057] In the embodiment, by using the spring, when the first straight rod 602 is rotated to the appropriate position, the chuck 74 can be clamped into the docking disc 76 under the action of the spring force, thereby playing the role of quickly stopping the driven roller 4; and by using the limiting rod 78, the sliding direction of the chuck 74 can be limited.

[0058] The application further provides an electronic belt scale eccentricity type belt tensioning method, which is used for the electronic belt scale eccentricity type belt tensioning device of any one of claims 1 to 9 and comprises the following steps: S1: starting a driving unit, the driving unit drives the first straight rod 602 to rotate and approach the driven roller 4 through a first transmission assembly; S2: the driving unit drives the rack 604 to slide along the first straight rod 602 to tension the belt 5 through a second transmission assembly; S3: the rotating rod drives the brake assembly to dock with the driven roller 4, the driving unit is turned off, and the brake assembly stops the driven roller 4 and the belt 5.

[0059] Working principle: by using the first motor 2, the first motor 2 on the rack 1 is positively rotated, so that the first rotating rod 601 can be positively rotated under the action of the first belt pulley 607, the second belt pulley 608 and the first transmission belt 609, the first straight rod 602 can be swung downward under the action of the first rotating rod 601, and the tensioning wheel 605 on the rack 604 can be swung downward under the action of the first straight rod 602, and in the whole downward swinging process, the third gear 626 is always separated from the rack 604 under the action of the clutch assembly, and the separation here means that the third gear 626 does not mesh with the rack 604 at this time, so that the rack 604 does not slide relative to the first straight rod 602 in the whole process of the first straight rod 602 swinging downward, and thus when the belt 5 is used for a long time, the electronic belt scale does not need to stop running, and the tensioning wheel 605 can be rolled against the inner side of the belt 5 by swinging the rack 604, so as to tension the belt.

[0060] When the belt 5 is used for a long time, it is inevitable that the belt 5 will be offset, and at this time, in order to avoid the impact of the offset of the belt 5 on the conveying of the material on the belt 5, it is necessary to quickly stop the belt 5. When the belt 5 needs to be quickly stopped, the first motor 2 is reversed to rotate the first rotating rod 601 under the action of the first belt pulley 607, the second belt pulley 608 and the first transmission belt 609, so that the first straight rod 602 can swing upward under the action of the first rotating rod 601. Through the cooperation between the first gear 610 and the second gear 612, since the number of teeth of the first gear 610 and the number of teeth of the second gear 612 are different, the first rotating rod 601 can rotate a certain number of turns after rotating a certain angle range, so that the second rotating rod 611 can rotate a certain number of turns. At this time, through the action of the third belt pulley 613, the fourth belt pulley 618 and the second transmission belt 619, the sliding shaft 617 on the second straight rod 615 can rotate. When the first straight rod 602 swings upward, the third gear 626 can slide to the direction of the rack 604 under the action of the electric push rod 624 on the connecting frame 623, so that the third gear 626 can be engaged with the rack 604. Through the connection between the butt joint shaft on the third gear 626 and the sliding shaft 617, the third gear 626 on the butt joint shaft can be rotated during the rotation of the sliding shaft 617, and the rack 604 can slide along the guide rail 603 on the first straight rod 602 under the action of the third gear 626, thereby adjusting the distance between the first rotating rod 601 and the tension pulley 605, so that the tension pulley 605 can abut to the inner side of the conveyor during the entire upward swinging of the first straight rod 602, thereby tensioning the belt 5.

[0061] When the first straight rod 602 is swung up to contact the abutting disc 76 on the driven roller 4, the first straight rod 602 can slide along the abutting disc 76 by the chamfered surface between the chuck 74 and the abutting disc 76. When the first straight rod 602 is rotated to a specified position, the chuck 74 can slide along the direction of the limiting rod 78 by the spring, so that the chuck 74 can be clamped into the abutting disc 76 on the driven roller 4. At this time, the plurality of clamping pins 75 on the chuck 74 are inserted into the arc-shaped clamping slots 77 on the abutting disc 76. The clamping pins 75 and the arc-shaped clamping slots 77 can limit the rotation of the driven roller 4, so that the belt 5 can be quickly stopped. At this time, the belt 5 on the rack 1 can be adjusted again.

[0062] When the belt 5 on the rack 1 is adjusted, the first motor 2 on the rack 1 is rotated by the first motor 2, so that the first rotating rod 601 can be rotated by the first belt pulley 607, the second belt pulley 608 and the first transmission belt 609. The first straight rod 602 can be swung down by the first rotating rod 601, so that the tensioner 605 on the rack 704 can be swung down by the first straight rod 602. The first straight rod 602 can adjust the distance between the first rotating rod 601 and the tensioner 605 by the gear and the rack 604, so that the tensioner 605 can abut the inner side of the belt 5 when the first straight rod 602 is swung to a proper position, so that the belt 5 can be tensioned.

[0063] The above describes some exemplary embodiments of the application by way of illustration, and it is needless to say that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the application. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of the claims of the application.

Claims

1. An oscillating belt tensioning device for an electronic belt scale, the electronic belt scale comprising a frame (1) and a drive roller (3) and a driven roller (4) rotatably mounted on the frame (1), wherein a belt (5) is slidably sleeved on the drive roller (3) and the driven roller (4); characterized in that, include: The first straight rod (602) is rotatably connected to the side wall of the frame (1); A rack (604) is slidably disposed on the first straight rod (602) along the axial direction of the first straight rod (602); The tensioning pulley (605) is rotatably connected to the rack (604) and rolls against the inside of the belt (5) to tension the belt (5). A first transmission assembly, which receives a drive from a drive unit to cause the first straight rod (602) to swing; The second transmission assembly is driven by the drive unit to make the rack (604) slide along the first straight rod (602); A braking assembly is mounted on the first straight rod (602), and the braking assembly has a braking position that engages with the driven roller (4) during the swinging process of the first straight rod (602); The first transmission assembly includes a second motor (606) fixedly mounted on the frame (1), and the output end of the second motor (606) is fixedly connected to a first pulley (607). The first transmission assembly further includes a first rotating rod (601) rotatably mounted on the frame (1), a second pulley (608) is fixedly mounted on the circumferential surface of the first rotating rod (601), and the first pulley (607) and the second pulley (608) are connected by a first transmission belt (609). The second transmission assembly includes a second rotating rod (611) rotatably mounted on the frame (1), a second gear (612) fixedly mounted on the circumferential surface of the second rotating rod (611), a first gear (610) meshing with the second gear (612) on the circumferential surface of the first rotating rod (601), and a third pulley (613) fixedly mounted on the circumferential surface of the second rotating rod (611). A connecting seat (614) is also fixedly installed on the frame (1). A second straight rod (615) is rotatably connected to the connecting seat (614). A sliding shaft (617) is slidably provided on the second straight rod (615). A fourth pulley (618) is fixedly installed at one end of the sliding shaft (617). The third pulley (613) and the fourth pulley (618) are connected by a second transmission belt (619). A sliding block (620) is rotatably disposed on the circumferential surface of the sliding shaft (617). The sliding block (620) is slidably disposed on the second straight rod (615), and a first elastic element (621) is disposed between the sliding block (620) and the second straight rod (615). A connecting frame (623) is fixedly installed on the sliding block (620), and a third gear (626) that meshes with the rack (604) is provided on the connecting frame (623). A clutch assembly is provided between the sliding block (620) and the connecting frame (623); A first connecting rail (6151) is fixedly connected to the second straight rod (615), a first connecting slider (6152) is slidably arranged on the first connecting rail (6151), a second connecting slider (6153) is rotatably connected to the first connecting slider (6152), a second connecting rail (6154) is slidably arranged on the second connecting slider (6153), and the second connecting rail (6154) is fixedly installed on the first straight rod (602); The clutch assembly includes an electric push rod (624) fixedly mounted on the connecting frame (623). The output end of the electric push rod (624) is rotatably provided with a connecting shaft (625) that is opposite to the sliding shaft (617). The third gear (626) is fixedly mounted on the circumferential surface of the connecting shaft (625).

2. The electronic belt scale oscillating belt tensioning device according to claim 1, characterized in that, The connecting shaft (625) is fixedly connected to a docking block (627) at one end near the sliding shaft (617), and a docking groove (628) adapted to the docking block (627) is provided at one end of the sliding shaft (617) near the connecting shaft (625).

3. The electronic belt scale oscillating belt tensioning device according to claim 1, characterized in that, The first elastic element (621) is a compression spring. One end of the compression spring is fixedly connected to the sliding block (620), and the other end is fixedly mounted on the second straight rod (615) through the connecting plate (622).

4. The oscillating belt tensioning device for an electronic belt scale according to claim 1, characterized in that, The brake assembly includes a rotating seat (71) rotatably connected to the first straight rod (602), a movable plate (72) slidably disposed on the rotating seat (71), a second elastic element (73) disposed between the movable plate (72) and the rotating seat (71), a chuck (74) fixedly mounted on the movable plate (72), and a plurality of locking pins (75) fixedly mounted on the chuck (74). A mating plate (76) is fixedly connected to the end face of the driven roller (4), and the mating plate (76) has a plurality of arc-shaped slots (77) that are adapted to the locking pin (75).

5. The electronic belt scale oscillating belt tensioning device according to claim 4, characterized in that, The second elastic element (73) is a spring, and the two ends of the spring are fixedly connected to the rotating seat (71) and the movable plate (72) respectively; A limiting rod (78) is fixedly connected to the rotating seat (71), the movable plate (72) is slidably sleeved on the limiting rod (78), and the spring is sleeved on the limiting rod (78).

6. A method for tensioning an oscillating belt in an electronic belt scale, used in any one of the oscillating belt tensioning devices for electronic belt scales as described in claims 1 to 5, characterized in that, Includes the following steps: S1: Start the drive unit, which drives the first straight rod (602) to rotate and approach the driven roller (4) through the first transmission component. S2: The drive unit drives the rack (604) to slide along the first straight rod (602) through the second transmission assembly so that the tensioning wheel (605) tensions the belt (5); S3: The rotating rod drives the brake assembly to engage with the driven roller (4), shuts off the drive unit, and the brake assembly stops the driven roller (4) and belt (5).

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