Belt tensioning device capable of being automatically adjusted

Abstract

The utility model discloses a belt tensioning device capable of automatically adjusting, which relates to the technical field of belt tensioning adjusting devices, is used for adjusting a conveying belt on a belt conveying mechanism, and comprises a belt tensioning device, a first belt roller, a second belt roller, a driving motor and a control terminal, the first belt roller and the second belt roller are installed on the belt tensioning device, the conveying belt is wound on the first belt roller and the second belt roller in an S shape, a pressure sensor is embedded in the second belt roller, the driving motor is in transmission connection with the belt tensioning device, and the belt tensioning device, the pressure sensor and the driving motor are all electrically connected with the control terminal. The technical problems that in the prior art, due to the fact that a tensioning structure adopts a spring automatic tensioning mode or a screw jacking tensioning mode to adjust the conveying belt, adjustment of the tensioning degree of the conveying belt is unstable and even cannot be achieved, operation is tedious, and consumed time is long are solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of belt tensioning and adjusting devices, and particularly relates to an automatically adjustable belt tensioning device. Background Art

[0002] Conveyor belts, also known as conveyor belts, play the role of carrying and transporting materials in belt conveyor mechanisms. They are mainly composite products composed of rubber, fiber and metal; or products composed of plastic and fabric. Belt conveyor mechanisms are widely used to transport various solid, powdery materials or finished items. Conveyor belts can transport continuously and efficiently, and are simple to operate, easy to use, and easy to maintain. They can also shorten the transportation distance, reduce production costs, and save manpower and material resources.

[0003] The conveyor belt needs to be kept taut during operation, but due to long-term use, its own tension will decrease. In particular, a heating bucket is usually set under the cigarette pack conveying mechanism to quickly dry the cigarette packs and make the packaging firmly bonded. Therefore, the conveyor belt at the cigarette pack transmission mechanism is easily stretched by heat, which causes slippage between the belt and the pulley, thereby affecting the conveying effect. Some existing conveyor mechanism tensioning structures use springs for automatic tensioning, but the spring automatic tensioning itself is unstable, and the tension during use is too large, causing the torsion spring to fail; others use screws to push the tensioning roller for adjustment. This tensioning adjustment method requires the use of tools to operate, which is time-consuming and cumbersome, and very inconvenient. Utility Model Content

[0004] The purpose of the utility model is to provide an automatically adjustable belt tensioning device, so as to overcome the technical problems in the prior art that the tensioning structure uses a spring for automatic tensioning or a screw for tensioning to adjust the conveyor belt, resulting in unstable or even impossible adjustment of the conveyor belt tension, as well as cumbersome and time-consuming operation. The specific technical solution is as follows:

[0005] An automatically adjustable belt tensioning device, used for adjusting the tension of a conveying belt on a belt conveying mechanism, comprises a belt tensioning device, a first belt roller, a second belt roller, a driving motor and a control terminal;

[0006] The belt tensioning device is mounted on the frame of the belt conveying mechanism, and the first belt roller and the second belt roller are both mounted on the belt tensioning device;

[0007] The conveyor belt is S-shaped and wound around the first belt roller and the second belt roller, and the second belt roller is embedded with a pressure sensor;

[0008] The driving motor is in driving connection with the belt tensioning device, and is used to drive the belt tensioning device to rotate so as to adjust the tension of the conveying belt;

[0009] The belt tensioning device, the pressure sensor and the driving motor are all electrically connected to the control terminal.

[0010] Preferably, the belt tensioning device comprises a rear end cover, a chassis, a T-shaped belt roller bracket and a limiting mechanism;

[0011] The rear end cover is fixedly mounted on the frame of the belt conveyor mechanism, the chassis is mounted on the rear end cover by connecting bolts, the rear end cover and the chassis form a mounting body, and a mounting hole is provided through the center of the mounting body;

[0012] One end of the T-belt roller bracket passes through the mounting hole and is rotatably connected to the mounting hole, the other end of the T-belt roller bracket is connected to the first belt roller and the second belt roller, and the drive motor is transmission-connected to the end of the T-belt roller bracket passing through the mounting hole;

[0013] The limiting mechanism is arranged in a accommodating compartment formed between the rear end cover and the chassis, and is connected to the T-belt roller bracket. The limiting mechanism is electrically connected to the control terminal.

[0014] Preferably, the T-shaped belt roller bracket includes a mounting shaft, a limit plate and a belt roller mounting rod;

[0015] The mounting shaft rod passes through the mounting hole and is rotatably connected to the mounting hole. A polygonal limiting section is provided on the mounting shaft rod, and the polygonal limiting section is located in the accommodating bin. One end of the mounting shaft rod passing through the mounting hole is transmission-connected to the driving motor, and the limiting mechanism is connected to the polygonal limiting section.

[0016] The limit plate is connected to the end of the mounting shaft away from the driving motor, and the end of the limit plate away from the mounting shaft is symmetrically provided with two belt roller mounting rods, and the first belt roller and the second belt roller are respectively installed on the two belt roller mounting rods.

[0017] Preferably, the end of the chassis connected to the rear end cover is provided with a first receiving groove and a second receiving groove;

[0018] The first receiving groove is opened at the center of the chassis, and the second receiving groove is opened symmetrically at two ends of the first receiving groove.

[0019] Preferably, the limiting mechanism comprises a bidirectional ratchet and two electric push rods;

[0020] A polygonal hole matching the polygonal limiting section is provided through the center of the bidirectional ratchet, the bidirectional ratchet is fixedly mounted on the polygonal limiting section through the polygonal hole, and the bidirectional ratchet is located in the first accommodating groove;

[0021] The two electric push rods are arranged in the second accommodating groove, the fixed end of the electric push rod is connected to the chassis, and the movable end thereof faces the bidirectional ratchet, and one end of the electric push rod facing the bidirectional ratchet is set as a frustum structure to match the tooth groove on the bidirectional ratchet;

[0022] The electric push rod is electrically connected to the control terminal.

[0023] Preferably, a retract button is provided on the frame of the belt conveyor mechanism, and the retract button is electrically connected to the control terminal.

[0024] Preferably, the drive motor is a servo motor.

[0025] Preferably, the control terminal is a PLC controller.

[0026] Compared with the existing technology, the utility model has the following beneficial effects:

[0027] The utility model provides an automatically adjustable belt tensioning device, which is implemented by wrapping a conveying belt in an S shape around a first belt roller and a second belt roller, and arranging a pressure sensor on the second belt roller to detect the pressure of the conveying belt on the second belt roller to determine the tensioning force of the conveying belt. When the pressure detected by the pressure sensor is less than a preset pressure, a driving motor drives the belt tensioning device to rotate, thereby driving the first belt roller and the second belt roller to rotate as a whole, and the first belt roller and the second belt roller perform a winding operation on the conveying belt to adjust the tension of the conveying belt, thereby solving the technical problems in the prior art that the tensioning structure adopts a spring for automatic tensioning or a screw for tensioning to adjust the conveying belt, resulting in unstable or even impossible adjustment of the conveying belt tension, as well as complicated and time-consuming operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solution of the embodiment of the utility model, the following will briefly introduce the drawings required for the description of the embodiment. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, each element or part is not necessarily drawn according to the actual scale.

[0029] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0030] Figure 2 It is a front view of the installation of the belt tensioning device of the utility model.

[0031] Figure 3 It is a structural schematic diagram of a T-shaped belt roller bracket of the utility model.

[0032] Figure 4 It is a structural schematic diagram of the limiting mechanism and chassis of the utility model.

[0033] Description of main reference numerals:

[0034] 100- conveyor belt, 200- belt tensioning device, 210- rear end cover, 220- chassis, 221- first accommodating groove, 222- second accommodating groove, 230- T-type belt roller bracket, 231- mounting shaft, 2311- polygonal limiting section, 232- limiting plate, 233- belt roller mounting rod, 240- limiting mechanism, 241- bidirectional ratchet, 242- electric push rod, 250- mounting body, 300- first belt roller, 400- second belt roller, 410- pressure sensor, 500- driving motor. DETAILED DESCRIPTION

[0035] 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 the embodiments. 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.

[0036] In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "top", "bottom", "top surface", "bottom surface", "inside", "outside", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0037] In the description of the present utility model, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed" etc. are understood to exclude the number itself, and "above", "below", "within" etc. are understood to include the number itself. If the terms "first", "second", "third" are described, they are only used for the purpose of description and distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0038] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "set" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. The following is a description of the embodiments of the present invention based on its overall structure.

[0039] Example

[0040] like Figures 1 to 4 As shown, an embodiment of the present application provides an automatically adjustable belt tensioning device for adjusting the tension of a conveying belt 100 on a belt conveying mechanism, including a belt tensioning device 200, a first belt roller 300, a second belt roller 400, a driving motor 500 and a control terminal.

[0041] The driving motor 500 may be a servo motor, and the control terminal may be a PLC controller.

[0042] The belt tensioning device 200 is installed on the frame of the belt conveying mechanism, the first belt roller 300 and the second belt roller 400 are both installed on the belt tensioning device 200, the conveying belt 100 is S-shaped and arranged on the first belt roller 300 and the second belt roller 400, and the second belt roller 400 is embedded with a pressure sensor 410, and the pressure sensor 410 is used to collect the pressure of the conveying belt 100 on the second belt roller 400.

[0043] The driving motor 500 is in transmission connection with the belt tensioning device 200 , and is used to drive the belt tensioning device 200 to rotate so as to drive the first belt roller 300 and the second belt roller 400 to rotate as a whole so as to adjust the tension of the conveying belt 100 .

[0044] The belt tensioning device 200 , the pressure sensor 410 , and the driving motor 500 are all electrically connected to the control terminal.

[0045] Among them, Figure 2As shown, when the pressure sensor 410 detects that the pressure of the conveyor belt 100 on the second belt roller 400 is less than the threshold value preset in the control terminal, the control terminal sends a control signal to the drive motor 500 to drive the drive motor 500 to start, and the drive motor 500 drives the belt tensioning device 200 to rotate, so that the first belt roller 300 and the second belt roller 400 rotate as a whole to achieve the tension adjustment of the conveyor belt 100. When the tension of the conveyor belt 100 reaches the requirement, the pressure parameter collected by the pressure sensor 410 is greater than or equal to the threshold value preset in the control terminal, and the control terminal controls the drive motor 500 to stop rotating to maintain the tension of the conveyor belt 100.

[0046] In some preferred embodiments, the belt tensioning device 200 includes a rear end cover 210, a chassis 220, a T-belt roller bracket 230 and a limiting mechanism 240. The rear end cover 210 is fixedly mounted on the frame of the belt conveying mechanism. The chassis 220 is mounted on the rear end cover 210 by connecting bolts. The rear end cover 210 and the chassis 220 constitute an installation body 250. A mounting hole is provided through the center of the installation body 250. One end of the T-belt roller bracket 230 penetrates the mounting hole and is rotatably connected to the mounting hole. The other end of the T-belt roller bracket 230 is connected to the first belt roller 300 and the second belt roller 400. The driving motor 500 is transmission-connected to one end of the T-belt roller bracket 230 that penetrates the mounting hole. The limiting mechanism 240 is arranged in a accommodating bin formed between the rear end cover 210 and the chassis 220, and is connected to the T-belt roller bracket 230. The limiting mechanism 240 is electrically connected to the control terminal.

[0047] Furthermore, a plurality of waist grooves are provided on the chassis 220. The waist grooves are provided so that when the tensioning angle is not enough, the screws connected to the rear end cover 210 can be loosened, and the chassis 220 can be rotated to adjust the tension to avoid contact and winding interference of the belt.

[0048] Among them, the mounting body 250 formed by the rear end cover 210 and the chassis 220 provides a mounting reference for the T-belt roller bracket 230, the driving motor 500 drives the T-belt roller bracket 230 to rotate on the mounting body 250, and the limiting mechanism 240 is used to prevent the T-belt roller bracket 230 from rotating when the driving motor 500 stops running.

[0049] In some preferred embodiments, the T-shaped belt roller bracket 230 includes a mounting shaft 231, a limiting plate 232 and a belt roller mounting rod 233, the mounting shaft 231 passes through the mounting hole and is rotatably connected to the mounting hole, a polygonal limiting section 2311 is provided on the mounting shaft 231, and the polygonal limiting section 2311 is located in the accommodating bin, one end of the mounting shaft 231 passing through the mounting hole is transmission-connected to the drive motor 500, the limiting mechanism 240 is connected to the polygonal limiting section 2311, the limiting plate 232 is connected to the end of the mounting shaft 231 away from the drive motor 500, and two belt roller mounting rods 233 are symmetrically provided at the end of the limiting plate 232 away from the mounting shaft 231, and the first belt roller 300 and the second belt roller 400 are respectively installed on the two belt roller mounting rods 233.

[0050] Among them, the two ends of the mounting shaft 231 are cylindrical sections, and a polygonal limiting section 2311 is set between the two cylindrical sections. The two cylindrical sections are rotatably connected to the rear end cover 210 and the chassis 220 respectively. On the cross-section of the mounting shaft 231, the cross-sectional shape of the polygonal limiting section 2311 is inscribed in the cross-sectional shape of the cylindrical section rotatably connected to the chassis 220, and the driving motor 500 can be transmission-connected to the mounting shaft 231 through a coupling.

[0051] In some preferred embodiments, the end of the chassis 220 connected to the rear end cover 210 is provided with a first receiving groove 221 and a second receiving groove 222, the first receiving groove 221 is opened at the center of the chassis 220, and the second receiving groove 222 is symmetrically opened at both ends of the first receiving groove 221, the limiting mechanism 240 includes a bidirectional ratchet 241 and two electric push rods 242, the center of the bidirectional ratchet 241 is penetrated by a polygonal hole adapted to the polygonal limiting section 2311, and the bidirectional ratchet 241 is passed through The polygonal hole is fixedly mounted on the polygonal limiting section 2311, and the bidirectional ratchet 241 is located in the first accommodating groove 221, and the two electric push rods 242 are arranged in the second accommodating groove 222, the fixed end of the electric push rod 242 is connected to the chassis 220, and its movable end faces the bidirectional ratchet 241, and one end of the electric push rod 242 facing the bidirectional ratchet 241 is set as a frustum structure to adapt to the tooth groove on the bidirectional ratchet 241, and the electric push rod 242 is electrically connected to the control terminal.

[0052] When the chassis 220 is connected to the rear end cover 210, the first receiving groove 221, the second receiving groove 222 and the rear end cover 210 form the receiving bin, and the polygonal limiting section 2311 is provided on the mounting shaft 231 to prevent the bidirectional ratchet 241 and the mounting shaft 231 from rotating relative to each other. Figure 2 As shown, when the pressure sensor 410 detects that the pressure of the conveyor belt 100 on the second belt roller 400 is less than a threshold value preset in the control terminal, it means that the conveyor belt 100 is loose and the tension of the conveyor belt 100 does not meet the requirement. At this time, the electric push rod 242 contracts to make the active end of the electric push rod 242 away from the bidirectional ratchet 241. At the same time, the control terminal controls the drive motor 500 to rotate counterclockwise to drive the T-belt roller bracket 230 to rotate, so that the first belt roller 300 and the second belt roller 400 are rotated as a whole. The body rotates counterclockwise around the central axis of the mounting body 250 to adjust the tension of the conveyor belt 100. When the tension of the conveyor belt 100 reaches the requirement, the pressure parameter collected by the pressure sensor 410 is greater than or equal to the threshold value preset in the control terminal, and the control terminal controls the drive motor 500 to stop rotating. At the same time, the control terminal controls the active end of the electric push rod 242 to embed into the tooth groove of the bidirectional ratchet 241 to prevent the T-belt roller bracket 230 from rotating to maintain the tension of the conveyor belt 100.

[0053] In some preferred embodiments, a retraction button is further provided on the frame of the belt conveyor mechanism, and the retraction button is electrically connected to the control terminal.

[0054] Wherein, by setting the retraction button, when the belt conveyor mechanism needs to stop running for a long time, such as stopping production or taking a holiday, a loosening signal is sent to the control terminal through the retraction button. Figure 2 As shown, the control terminal controls the driving motor 500 to drive the first belt roller 300 and the second belt roller 400 to rotate clockwise as a whole, so as to loosen the conveyor belt 100, thereby preventing the conveyor belt 100 from being in a long-term tensioned state and reducing its service life.

[0055] To summarize, an automatically adjustable belt tensioning device is provided in an embodiment of the present application. The conveyor belt is arranged in an S shape on a first belt roller and a second belt roller, and a pressure sensor is arranged on the second belt roller to detect the pressure of the conveyor belt on the second belt roller to determine the tensioning force of the conveyor belt. When the pressure detected by the pressure sensor is less than a preset pressure, the driving motor drives the belt tensioning device to rotate, thereby driving the first belt roller and the second belt roller to rotate as a whole. The first belt roller and the second belt roller wind up the conveyor belt to adjust the tension of the conveyor belt. This solves the technical problems in the prior art that the tensioning structure uses a spring for automatic tensioning or a screw for tensioning, resulting in unstable or even impossible adjustment of the conveyor belt tension, as well as complicated and time-consuming operation.

[0056] The foregoing descriptions of specific exemplary embodiments of the present invention are for the purpose of explanation and illustration. These descriptions are not intended to limit the present invention to the precise form disclosed, and it is obvious that many changes and variations can be made based on the above teachings. Although an embodiment of the present invention has been shown and described, this specific embodiment is merely an explanation of the present invention and is not a limitation of the present invention. The specific features, structures, materials or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. The purpose of selecting and describing the exemplary embodiments is to explain the specific principles of the present invention and its practical application, so that those skilled in the art can make modifications, substitutions, variations and various selections and changes to the embodiments without creative contribution as needed after reading this specification without departing from the principles and purpose of the present invention, but they are protected by patent law as long as they are within the scope of the claims of the present invention.

Claims

1. An automatically adjustable belt tensioning device for adjusting the tension of a conveying belt (100) on a belt conveying mechanism, characterized in that: It comprises a belt tensioning device (200), a first belt roller (300), a second belt roller (400), a driving motor (500) and a control terminal; The belt tensioning device (200) is mounted on a frame of the belt conveying mechanism, and the first belt roller (300) and the second belt roller (400) are both mounted on the belt tensioning device (200); The conveying belt (100) is arranged in an S shape on the first belt roller (300) and the second belt roller (400), and the second belt roller (400) is embedded with a pressure sensor (410); The driving motor (500) is drivingly connected to the belt tensioning device (200) and is used to drive the belt tensioning device (200) to rotate so as to adjust the tension of the conveying belt (100); The belt tensioning device (200), the pressure sensor (410) and the driving motor (500) are all electrically connected to the control terminal.

2. An automatically adjustable belt tensioning device according to claim 1, characterized in that: The belt tensioning device (200) comprises a rear end cover (210), a chassis (220), a T-shaped belt roller bracket (230) and a limiting mechanism (240); The rear end cover (210) is fixedly mounted on the frame of the belt conveyor mechanism, the chassis (220) is mounted on the rear end cover (210) via connecting bolts, the rear end cover (210) and the chassis (220) form a mounting body (250), and a mounting hole is provided through the center of the mounting body (250); One end of the T-shaped belt roller bracket (230) passes through the mounting hole and is rotatably connected to the mounting hole, the other end of the T-shaped belt roller bracket (230) is connected to the first belt roller (300) and the second belt roller (400), and the drive motor (500) is transmission-connected to the end of the T-shaped belt roller bracket (230) passing through the mounting hole; The limiting mechanism (240) is arranged in a storage compartment formed between the rear end cover (210) and the chassis (220), and is connected to the T-belt roller bracket (230). The limiting mechanism (240) is electrically connected to the control terminal.

3. The automatically adjustable belt tensioning device according to claim 2, characterized in that: The T-shaped belt roller bracket (230) comprises a mounting shaft rod (231), a limiting plate (232) and a belt roller mounting rod (233); The mounting shaft (231) passes through the mounting hole and is rotatably connected to the mounting hole; a polygonal limiting section (2311) is provided on the mounting shaft (231); the polygonal limiting section (2311) is located in the accommodating bin; one end of the mounting shaft (231) passing through the mounting hole is transmission-connected to the driving motor (500); and the limiting mechanism (240) is connected to the polygonal limiting section (2311); The limiting plate (232) is connected to the end of the mounting shaft (231) away from the driving motor (500), and the end of the limiting plate (232) away from the mounting shaft (231) is symmetrically provided with two belt roller mounting rods (233), and the first belt roller (300) and the second belt roller (400) are respectively mounted on the two belt roller mounting rods (233).

4. The automatically adjustable belt tensioning device according to claim 3, characterized in that: One end of the chassis (220) connected to the rear end cover (210) is provided with a first receiving groove (221) and a second receiving groove (222); The first receiving groove (221) is opened at the center of the bottom plate (220), and the second receiving groove (222) is opened symmetrically at two ends of the first receiving groove (221).

5. The automatically adjustable belt tensioning device according to claim 4, characterized in that: The limiting mechanism (240) comprises a bidirectional ratchet (241) and two electric push rods (242); A polygonal hole matching the polygonal limiting section (2311) is provided through the center of the bidirectional ratchet (241); the bidirectional ratchet (241) is fixedly mounted on the polygonal limiting section (2311) through the polygonal hole, and the bidirectional ratchet (241) is located in the first accommodating groove (221); The two electric push rods (242) are arranged in the second receiving groove (222), the fixed end of the electric push rod (242) is connected to the chassis (220), and the movable end thereof faces the bidirectional ratchet (241), and one end of the electric push rod (242) facing the bidirectional ratchet (241) is configured as a frustum structure to match the tooth groove on the bidirectional ratchet (241); The electric push rod (242) is electrically connected to the control terminal.

6. The automatically adjustable belt tensioning device according to claim 1, characterized in that: A retraction button is arranged on the frame of the belt conveyor mechanism, and the retraction button is electrically connected to the control terminal.

7. The automatically adjustable belt tensioning device according to claim 1, characterized in that: The driving motor (500) is a servo motor.

8. The automatically adjustable belt tensioning device according to claim 1, characterized in that: The control terminal is a PLC controller.

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