Belt tensioning device based on bidirectional ratchet wheel structure and tensioning driving device

Abstract

The utility model discloses a belt tensioning device and a tensioning driving device based on a two-way ratchet wheel structure, and relates to the technical field of belt tensioning adjusting devices, the belt tensioning device comprises a belt tensioning mechanism and a tensioning driving mechanism which are matched for use, the belt tensioning mechanism is installed on a rack of a belt conveying mechanism, and the tensioning driving mechanism is installed on the rack of the belt conveying mechanism. The belt roller is installed on the belt tensioning mechanism, a known conveying belt is wound on the belt roller, the belt tensioning mechanism and the tensioning driving mechanism are both based on a bidirectional ratchet mechanism, the belt tensioning mechanism is driven to rotate by driving the tensioning driving mechanism, and therefore the loosened conveying belt is tensioned / tightened, and the belt roller is driven by the tensioning driving mechanism to rotate. The belt tensioning mechanism can ensure that the belt does not return in the belt tensioning process, that is, the belt roller does not rotate; the tensioning driving mechanism can be suitable for a small operation space, meanwhile, frequent disassembly and adjustment are not needed in the operation process, operation steps are reduced, working hours are saved, working efficiency is improved, and meanwhile labor is saved and convenience is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of belt tension adjusting devices, in particular to a belt tensioning device and a tension driving device based on a bidirectional ratchet structure. Background Technique

[0002] The conveyor belt, also known as the transport belt, plays a role in carrying and transporting materials in the belt conveying mechanism. It is mainly a composite product composed of rubber, fiber and metal; or a product composed of plastic and fabric composites. Belt conveying mechanisms are widely used for conveying various solid, powder-like materials or finished items. The conveyor belt can transport continuously and efficiently, and is simple to operate, easy to use, easy to maintain, and can shorten the transportation distance, reduce the input of production costs, and save manpower and material resources.

[0003] Due to long-term use, the tension of the conveyor belt itself will decrease. In particular, a heating hopper is usually arranged below the cigarette packet conveying mechanism to quickly dry the cigarette packets, so that the packaging adhesion is firm. Therefore, the belt at the transmission mechanism of the cigarette packets is easily heated and stretched, resulting in slippage between the belt and the belt pulley, thereby affecting the conveying effect. Some of the existing tensioning structures of the conveying mechanism adopt spring automatic tensioning, but the spring automatic tensioning itself has instability, and at the same time, the pulling force during use is too large, resulting in the torsion spring not working; others adopt screws to push and tension the tensioning roller for adjustment. This kind of tensioning adjustment method requires the use of tools for operation, which is time-consuming and cumbersome, and very inconvenient.

[0004] Therefore, in order to solve the above existing problems, ensure the quick and convenient adjustment, and at the same time ensure the stability of the belt transmission after adjustment, it is urgent to design a device that uses a bidirectional ratchet to adjust the belt tension. Content of the Utility Model

[0005] Aiming at the above deficiencies, the utility model provides a belt tensioning device and a tension driving device based on a bidirectional ratchet structure. The device includes two supporting belt tensioning mechanisms and a tension driving mechanism. By driving the tension driving mechanism, the belt tensioning mechanism is driven to rotate, so as to tighten the loose conveyor belt. Among them, the belt tensioning mechanism can ensure that the belt will not retract during the belt tensioning process, that is, the belt roller will not rotate back; the tension driving mechanism can be applied to a smaller operation space, and at the same time, it is not necessary to disassemble and adjust frequently during the operation process, reducing the operation steps, saving the maintenance man-hours, improving the work efficiency, and being labor-saving and convenient. The specific technical solutions are as follows:

[0006] A belt tensioning device based on a bidirectional ratchet structure, including a belt roller and a conveyor belt on a belt conveying mechanism, the conveyor belt is wound around the belt roller, and further includes:

[0007] A belt tensioning mechanism, which is mounted on a frame of the belt conveying mechanism, and the belt roller is mounted on the belt tensioning mechanism;

[0008] The tensioning driving mechanism is detachably mounted on the belt roller, and the tensioning driving mechanism is used to drive the belt tensioning mechanism to rotate so as to tension the conveying belt.

[0009] Preferably, the belt tensioning mechanism includes a rear end cover, an intermediate T-shaped bracket, a chassis and a bidirectional ratchet mechanism, the rear end cover is 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 is used in conjunction with the chassis, the rear end cover and the chassis constitute an installation body, a mounting hole is provided through the center of the installation body, the intermediate T-shaped bracket is mounted in the mounting hole, the belt roller is mounted on the intermediate T-shaped bracket, and the bidirectional ratchet mechanism is mounted on the intermediate T-shaped bracket and is located in a accommodating bin formed between the rear end cover and the chassis.

[0010] Preferably, the middle T-shaped bracket includes an installation shaft, a square positioning column, a limit plate and a belt roller mounting rod. The installation shaft is rotatably installed in the mounting hole. The square positioning column, the limit plate and the belt roller mounting rod are sequentially arranged on the installation shaft. Two belt roller mounting rods are symmetrically arranged on the limit plate, and the belt roller is installed on the belt roller mounting rod.

[0011] Preferably, a receiving groove and a mounting groove are respectively provided on two opposite ends of the chassis.

[0012] Preferably, the two-way ratchet mechanism includes a two-way shift block, an intermediate shift block, a shift mounting shaft, a pawl mounting shaft, a left pawl, a right pawl, a restoring spring and a two-way ratchet; the center of the two-way ratchet is penetrated by a square hole adapted to the square positioning column; the two-way ratchet is fixedly mounted on the square positioning column through the square hole; the shift mounting shaft and the pawl mounting shaft are mounted on the mounting body; one end of the shift mounting shaft is provided with the intermediate shift block, and the other end is provided with the two-way shift block; the two-way shift block is located in the accommodating groove; the pawl mounting shaft is respectively provided with The left pawl and the right pawl, the middle shift block is located between the left pawl and the right pawl, the middle shift block, the left pawl, the right pawl and the two-way ratchet are located in the mounting groove, the left pawl and the right pawl are against the teeth of the two-way ratchet, and the restoring spring is provided on the two opposite inner sides of the mounting groove, one end of the restoring spring is connected to the inner wall, and the other end is connected to the left pawl / right pawl, the two-way shift block is shifted to release the resistance of the left pawl or the right pawl to the two-way ratchet, and under drive, the two-way ratchet can rotate around the center in the direction where it is not resisted.

[0013] Preferably, a tension driving device based on a bidirectional ratchet structure is used to drive a belt tensioning device. The tension driving mechanism includes:

[0014] A connecting tooling;

[0015] A driving tooling, which is detachably assembled with the connecting tooling. One end of the connecting tooling is connected to the belt roller, and the other end is connected to the driving tooling. The driving tooling is used to drive the belt tensioning mechanism to rotate.

[0016] Preferably, the connecting tooling includes a mounting plate, a connecting column, a driving tooling connecting shaft column and a square column. The square column is provided at one end of the driving tooling connecting shaft column, and the mounting plate is provided at the other end. Two connecting columns are provided on the mounting plate, and the connecting columns are inserted into the jacks at the ends of the belt roller.

[0017] Preferably, the driving tooling includes a tooling end cover, a tooling disc, a driving handle and a driving bidirectional ratchet mechanism. The tooling end cover is connected to the tooling disc by bolts. The tooling end cover and the tooling disc form a second mounting body. The driving handle and the tooling disc are of an integral structure. A connecting jack is provided through the tooling end cover. The driving bidirectional ratchet mechanism is rotatably arranged inside the second mounting body. The square column is inserted into the connecting jack and connected to the driving bidirectional ratchet mechanism.

[0018] Preferably, second accommodating grooves and second mounting grooves are respectively provided at opposite ends of the tooling disc.

[0019] Preferably, the driving bidirectional ratchet mechanism includes a rotating shaft, a driving gear, a second bidirectional shift block, a second intermediate shift block, a second shift mounting shaft, a second pawl mounting shaft, a second left pawl, a second right pawl and a second restoring spring, the rotating shaft is rotatably arranged at the center position of the second mounting body, the center of the rotating shaft is penetrated by a square hole adapted to the square column, the square column is inserted into the square hole on the rotating shaft to be connected with the driving bidirectional ratchet mechanism, the driving gear is mounted on the rotating shaft, the second shift mounting shaft and the second pawl mounting shaft are mounted on the second mounting body, one end of the second shift mounting shaft is provided with the second intermediate shift block, and the other end is provided with the second bidirectional shift block The second two-way shift block is located in the second accommodating groove, the second left pawl and the second right pawl are respectively provided on the second pawl mounting shaft, the second intermediate shift block is located between the second left pawl and the second right pawl, the second intermediate shift block, the second left pawl and the second right pawl are located in the second mounting groove, the second left pawl and the second right pawl are against the teeth of the driving gear, and the second restoring spring is provided on the opposite inner sides of the second mounting groove, one end of the second restoring spring is connected to the inner wall, and the other end is connected to the second left pawl / second right pawl, the second two-way shift block is moved to release the second left pawl or the second right pawl from resisting the driving gear.

[0020] Compared with the prior art, the beneficial effects of the utility model are:

[0021] 1. The utility model provides a belt tensioning device based on a bidirectional ratchet structure, which utilizes the structure of a bidirectional ratchet mechanism to reel in a conveyor belt to achieve tension adjustment of the conveyor belt. The setting of the bidirectional ratchet mechanism can, on the one hand, more conveniently reel in the conveyor belt to achieve belt tensioning, and on the other hand, the bidirectional ratchet mechanism can well prevent the belt from retreating (i.e., the rotation of the belt roller) after tensioning. The specific principle is that the belt roller located on the limit plate rotates around the center of the installation body under the drive of the tensioning drive mechanism to reel in the conveyor belt, thereby achieving the tensioning operation of the conveyor belt.

[0022] 2. The tensioning drive device based on a bidirectional ratchet structure provided by the present utility model has the same implementation principle as the belt tensioning mechanism, both of which utilize the structure of the bidirectional ratchet mechanism for driving. In the process of using the driving bidirectional ratchet mechanism in this tensioning drive mechanism, it is not necessary to remove it from the belt roller and then re - sleeve it for driving rotation. Only by driving the driving handle to reciprocally swing back and forth by a certain angle can the rotation of the belt tensioning mechanism be realized. This tensioning drive mechanism can be used in a smaller driving space. At the same time, different from the conventional driving handle, in order to drive the rotation of the belt tensioning mechanism, it is necessary to drive it to rotate a large angle, or perform the cumbersome driving operations of rotation - removal - reinstallation - rotation, reducing the difficulty of alignment connection. At the same time, this tensioning drive mechanism is convenient and labor - saving in driving, and it is stable without retracting during the driving process. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following will briefly introduce the drawings required for use in the description of the embodiments. In all the drawings, similar elements or parts are generally marked with similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0024] Figure 1 It is a schematic diagram of the overall structure of the device of the present utility model;

[0025] Figure 2 It is the front view of the installation of the belt tensioning mechanism in the present utility model;

[0026] Figure 3 It is a schematic diagram of the structure of the middle T - shaped bracket in the present utility model;

[0027] Figure 4 It is a schematic diagram of the structure of the bidirectional ratchet mechanism in the present utility model;

[0028] Figure 5 It is a schematic diagram of the structure of the connection tooling in the present utility model;

[0029] Figure 6 It is a schematic diagram of the structure of the tensioning drive mechanism in the present utility model;

[0030] Figure 7 It is a schematic diagram of the structure of the driving bidirectional ratchet mechanism in the present utility model.

[0031] 100-belt roller, 200-conveyor belt, 300-belt tensioning mechanism, 310-rear end cover, 320-middle T-shaped bracket, 321-installation shaft, 322-square card column, 323-limiting plate, 324-belt roller installation rod, 330-chassis, 331-accommodation groove, 332-installation groove, 340-bidirectional ratchet mechanism, 341-bidirectional shift block, 342-middle shift block, 343-shift installation shaft, 344-pawl installation shaft, 345-left ratchet, 346-right ratchet, 347-recovery spring, 348-bidirectional ratchet, 350-installation body, 400-tensioning drive mechanism, 410-connection tooling, 411-mounting plate, 412-connecting column, 413-driving tool connecting shaft column, 414-square column, 420-driving tool, 421-tool end cover, 422-tool plate, 4221-second accommodating groove, 4222-second mounting groove, 423-driving handle, 424-driving two-way ratchet mechanism, 4241-rotating shaft, 4242-driving gear, 4243-second two-way shift block, 4244-second intermediate shift block, 4245-second shift mounting shaft, 4246-second pawl mounting shaft, 4247-second left pawl, 4248-second right pawl, 4249-second return spring, 425-second mounting body. DETAILED DESCRIPTION

[0032] 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.

[0033] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention.

[0034] 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.

[0035] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be a direct connection or an indirect connection through an intermediate medium, and it may be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances. In addition, the technical features involved in different embodiments of the present utility model described below can be combined with each other as long as they do not conflict with each other.

[0036] Embodiment

[0037] As Figures 1-7 shown, the present utility model provides a belt tensioning device and a tensioning driving device based on a bidirectional ratchet structure, which specifically includes a belt tensioning mechanism 300 and a tensioning driving mechanism 400 that are used in a matching manner;

[0038] Preferably, the belt tensioning mechanism 300 is installed on a belt conveying mechanism. A conventional belt conveying mechanism includes a belt roller 100 and a conveying belt 200. The conveying belt 200 is wound around the belt roller 100, and the belt roller 100 supports and tightens the conveying belt 200, and drives the conveying belt 200 to perform a conveying operation by the rotation of the belt roller 100;

[0039] Preferably, the belt tensioning mechanism 300 is installed on the frame of the belt conveying mechanism, and the belt roller 100 is installed on the belt tensioning mechanism 300;

[0040] Preferably, the tensioning driving mechanism 400 is detachably installed on the belt roller 100. The belt roller 100 serves as an intermediate bridge between the belt tensioning mechanism 300 and the tensioning driving mechanism 400. The tensioning driving mechanism 400 is used to drive the belt tensioning mechanism 300 to rotate, so as to drive the position of the belt roller 100 to change, and further realize the tensioning operation of the conveying belt 200.

[0041] In some preferred embodiments, the belt tensioning mechanism 300 includes a rear end cover 310, an intermediate T-shaped bracket 320, a chassis 330, and a bidirectional ratchet mechanism 340. The rear end cover 310 is fixedly installed on the frame of the belt conveying mechanism. The chassis 330 is snap-fitted onto the rear end cover 310 through connecting bolts. The rear end cover 310 and the chassis 330 are used in a matching manner. The rear end cover 310 and the chassis 330 form an installation main body 350. The installation main body 350 is cylindrical. An installation hole runs through the center of the installation main body 350. The intermediate T-shaped bracket 320 is rotatably installed in the installation hole. The belt roller 100 is installed on the intermediate T-shaped bracket 320. The bidirectional ratchet mechanism 340 is installed on the intermediate T-shaped bracket 320 and is located in the accommodation bin formed between the rear end cover 310 and the chassis 330.

[0042] In some preferred embodiments, the intermediate T-shaped bracket 320 includes a mounting shaft rod 321, a square clamping column 322, a limiting plate 323, and a belt roller mounting rod 324. The mounting shaft rod 321 is rotatably installed in the installation hole. The square clamping column 322, the limiting plate 323, and the belt roller mounting rod 324 are sequentially arranged on the mounting shaft rod 321. Two belt roller mounting rods 324 are symmetrically arranged on the limiting plate 323. The belt roller 100 is installed on the belt roller mounting rod 324. Further, accommodation grooves 331 and installation grooves 332 are respectively arranged at opposite ends of the chassis 330.

[0043] In some preferred embodiments, the bidirectional ratchet mechanism 340 includes a bidirectional shift block 341, an intermediate shift block 342, a shift mounting shaft 343, a pawl mounting shaft 344, a left pawl 345, a right pawl 346, a recovery spring 347 and a bidirectional ratchet 348. The center of the bidirectional ratchet 348 is penetrated by a square hole that is compatible with the square positioning column 322. The bidirectional ratchet 348 is fixedly mounted on the square positioning column 322 through the square hole. The shift mounting shaft 343 and the pawl mounting shaft 344 are mounted on the mounting body 350. The middle shift block 342 is provided at one end of the shift mounting shaft 343, and the bidirectional shift block 341 is provided at the other end. The bidirectional shift block 341 is located in the accommodating groove 331. The left pawl 345 and the right pawl 346 are provided on the pawl mounting shaft 344, respectively. , the middle shift block 342 is located between the left pawl 345 and the right pawl 346, the middle shift block 342, the left pawl 345, the right pawl 346 and the two-way ratchet 348 are located in the mounting groove 332, the left pawl 345 and the right pawl 346 abut against the teeth of the two-way ratchet 348, the mounting groove 332 is provided with the recovery spring 347 on the two opposite inner sides, one end of the recovery spring 347 is connected to the inner wall, and the other end is connected to the left pawl 345 / right pawl 346, the two-way shift block 341 is shifted, the middle shift block 342 rotates to press the left pawl 345 or the right pawl 346, and the left pawl 345 or the right pawl 346 is pressed to the inner side of the mounting groove 332 to release the left pawl 345 or the right pawl 346 from abutting against the two-way ratchet 348:

[0044] Under drive, the two-way ratchet 348 can rotate around the center in the direction where it is not resisted; the original position of the middle shift block 342 is restored, and the pawl rebounds under the elasticity of the restoring spring 347 and returns to the original position. At this time, the left and right pawls again support the two-way ratchet 348, so that the two-way ratchet 348 cannot rotate. The purpose of setting the two-way ratchet mechanism 340 is, on the one hand, to more conveniently reel in the conveyor belt 200 to achieve belt tensioning, and on the other hand, to prevent rebound after belt tensioning. The two-way ratchet mechanism 340 can well prevent the retreat of the tensioned belt (i.e., the retreat / rotation of the belt roller 100). The specific principle is: the belt roller 100 located on the limit plate 323 rotates around the center of the mounting body 350 under the drive of the tensioning drive mechanism 400 to retract the conveyor belt 200, thereby achieving the tensioning operation of the conveyor belt 200.

[0045] Preferably, the tension driving mechanism 400 includes a connection tooling 410 and a driving tooling 420. The connection tooling 410 serves as a bridge between the driving tooling 420 and the belt tensioning mechanism 300. During operation, first install the connection tooling 410 on the driving tooling 420 (it can be seen therefrom that the connection tooling 410 and the driving tooling 420 are used in combination, and the connection tooling 410 is detachably installed on the driving tooling 420), and then align the connection tooling 410 with the insertion hole on the belt roller 100 and insert it. Drive the belt tensioning mechanism 300 by manually driving the driving tooling 420;

[0046] In some preferred embodiments, the connection tooling 410 includes a mounting plate 411, a connecting column 412, a driving tooling connecting shaft column 413, and a square column 414. The square column 414 is provided at one end of the driving tooling connecting shaft column 413, and the mounting plate 411 is provided at the other end. Two connecting columns 412 are provided on the mounting plate 411, and the connecting columns 412 are embedded in the insertion holes at the ends of the belt roller 100.

[0047] In some preferred embodiments, the driving tooling 420 includes a tooling end cover 421, a tooling plate 422, a driving handle 423, and a driving bidirectional ratchet mechanism 424. The tooling end cover 421 and the tooling plate 422 are connected by bolts. The tooling end cover 421 and the tooling plate 422 form a second mounting body 425. The driving handle 423 and the tooling plate 422 are of an integral structure. The tooling end cover 421 is provided with a connection insertion hole. The driving bidirectional ratchet mechanism 424 is rotatably arranged inside the second mounting body 425. The square column 414 is inserted through the connection insertion hole and connected to the driving bidirectional ratchet mechanism 424. Further, second accommodation grooves 4221 and second mounting grooves 4222 are respectively provided at opposite ends of the tooling plate 422.

[0048] In some preferred embodiments, the specific structural principle of the driving bidirectional ratchet mechanism 424 is the same as the bidirectional ratchet mechanism 340 described above. Specifically, the driving bidirectional ratchet mechanism 424 includes a rotating shaft 4241, a driving gear 4242, a second bidirectional shift block 4243, a second intermediate shift block 4244, a second shift mounting shaft 4245, a second pawl mounting shaft 4246, a second left pawl 4247, a second right pawl 4248 and a second restoring spring 4249. The rotating shaft 4241 is rotatably arranged on the second bidirectional shift block 4243. At the center position of the second mounting body 425, a square hole matching the square column 414 is penetrated through the center of the rotating shaft 4241, and the square column 414 is inserted into the square hole on the rotating shaft 4241 to connect with the driving two-way ratchet mechanism 424, and the driving gear 4242 is installed on the rotating shaft 4241, and the second toggle mounting shaft 4245 and the second pawl mounting shaft 4246 are installed on the second mounting body 425. One end of the second toggle mounting shaft 4245 is provided with the second center The second two-way shift block 4243 is disposed on the other end of the second two-way shift block 4243, the second two-way shift block 4243 is located in the second receiving groove 4221, the second pawl mounting shaft 4246 is respectively provided with the second left pawl 4247 and the second right pawl 4248, the second middle shift block 4244 is located between the second left pawl 4247 and the second right pawl 4248, the second middle shift block 4244, the second left pawl 4247 and the second right pawl 4248 are located in the second mounting In the mounting groove 4222, the second left pawl 4247 and the second right pawl 4248 abut against the teeth of the driving gear 4242. The second restoring spring 4249 is provided on the two opposite inner sides of the second mounting groove 4222. One end of the second restoring spring 4249 is connected to the inner wall, and the other end is connected to the second left pawl 4247 / the second right pawl. The second two-way shifting block 4243 is shifted to release the second left pawl 4247 or the second right pawl 4248 from abutting against the driving gear 4242:

[0049] Under driving, the driving gear 4242 can rotate around the center of the second mounting body 425 in the direction where it is not resisted; the second intermediate shifting block 4244 is restored to its original position, and the pawl rebounds under the elasticity of the second restoring spring 4249 and returns to its original (initial) position. At this time, the left and right second pawls resist the driving gear 4242 again, making the driving gear 4242 unable to rotate. The driving bi-directional ratchet mechanism 424 does not need to be removed from the belt roller 100 and then sleeved again for driving rotation during use. Only by driving the driving handle 423 to reciprocate and swing back and forth at a certain angle can the rotation of the belt tensioning mechanism 300 be driven. The tensioning driving mechanism 400 can be used in a smaller driving space. At the same time, different from the conventional driving handle that needs to drive a larger angle of rotation or the cumbersome driving operations of rotation - removal - reinstallation - rotation to drive the rotation of the belt tensioning mechanism 300, it reduces the difficulty of alignment connection. At the same time, the tensioning driving mechanism 400 is convenient and labor-saving to drive, and is stable and does not retreat during the driving process.

[0050] As described above, the above is only the specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed by the present invention should be covered by the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims.

Claims

1. A belt tensioning device based on a bidirectional ratchet structure, comprising a belt roller (100) and a conveying belt (200) on a belt conveying mechanism, wherein the conveying belt (200) is wound around the belt roller (100), characterized in that: Also includes: A belt tensioning mechanism (300) is mounted on a frame of a belt conveying mechanism, and the belt roller (100) is mounted on the belt tensioning mechanism (300); A tensioning drive mechanism (400) is detachably mounted on the belt roller (100), and the tensioning drive mechanism (400) is used to drive the belt tensioning mechanism (300) to rotate so as to tension the conveying belt (200).

2. A belt tensioning device based on a bidirectional ratchet structure according to claim 1, characterized in that: The belt tensioning mechanism (300) comprises a rear end cover (310), an intermediate T-shaped bracket (320), a chassis (330) and a bidirectional ratchet mechanism (340); the rear end cover (310) is mounted on a frame of the belt conveying mechanism; the chassis (330) is mounted on the rear end cover (310) by means of connecting bolts; the rear end cover (310) and the chassis (330) are used in conjunction with each other; the rear end cover (310) and the chassis (330) form a mounting body (350); a mounting hole is provided through the center of the mounting body (350); the intermediate T-shaped bracket (320) is mounted in the mounting hole; the belt roller (100) is mounted on the intermediate T-shaped bracket (320); the bidirectional ratchet mechanism (340) is mounted on the intermediate T-shaped bracket (320) and is located in a storage bin formed between the rear end cover (310) and the chassis (330).

3. A belt tensioning device based on a bidirectional ratchet structure according to claim 2, characterized in that: The middle T-shaped bracket (320) comprises a mounting shaft (321), a square positioning column (322), a limiting plate (323) and a belt roller mounting rod (324); the mounting shaft (321) is rotatably mounted in the mounting hole; the mounting shaft (321) is provided with the square positioning column (322), the limiting plate (323) and the belt roller mounting rod (324) in sequence; the limiting plate (323) is symmetrically provided with two belt roller mounting rods (324); the belt roller (100) is mounted on the belt roller mounting rod (324).

4. A belt tensioning device based on a bidirectional ratchet structure according to claim 3, characterized in that: The chassis (330) is provided with a receiving groove (331) and a mounting groove (332) at two opposite ends thereof.

5. A belt tensioning device based on a bidirectional ratchet structure according to claim 4, characterized in that: The bidirectional ratchet mechanism (340) comprises a bidirectional shift block (341), an intermediate shift block (342), a shifting installation shaft (343), a pawl installation shaft (344), a left pawl (345), a right pawl (346), a restoring spring (347) and a bidirectional ratchet (348). A square hole matching the square positioning column (322) is provided through the center of the bidirectional ratchet (348). The bidirectional ratchet (348) is fixedly installed on the square positioning column (322) through the square hole. The shifting installation shaft (343) and the pawl installation shaft (344) are installed on the installation body (350). The bidirectional shifting installation shaft (343) is provided with the intermediate shift block (342) at one end and the bidirectional shift block (341) at the other end. The bidirectional shift block (341) is located in the accommodating groove (331). The pawl installation shaft (344) is provided with the left pawl and the right pawl. The middle shift block (342) is located between the left ratchet (345) and the right ratchet (346), the middle shift block (342), the left ratchet (345), the right ratchet (346) and the bidirectional ratchet (348) are located in the mounting groove (332), the left ratchet (345) and the right ratchet (346) are against the teeth of the bidirectional ratchet (348), and the mounting groove (332) is provided with a plurality of teeth. The return spring (347) is provided on the two opposite inner sides of the two-way ratchet (32), one end of the return spring (347) is connected to the inner wall, and the other end is connected to the left ratchet (345) / right ratchet (346). The two-way shift block (341) is moved to release the left ratchet (345) or the right ratchet (346) from resisting the two-way ratchet (348). Under the drive, the two-way ratchet (348) can rotate around the center in the direction not resisted.

6. A tensioning drive device based on a bidirectional ratchet structure, used to drive the belt tensioning device based on a bidirectional ratchet structure according to any one of claims 1 to 5, characterized in that: The tensioning drive mechanism (400) comprises: Connecting tooling (410); A driving tool (420) is detachably assembled with the connecting tool (410); one end of the connecting tool (410) is connected to the belt roller (100), and the other end is connected to the driving tool (420); the driving tool (420) is used to drive the belt tensioning mechanism (300) to rotate.

7. A tensioning drive device based on a bidirectional ratchet structure according to claim 6, characterized in that: The connecting tool (410) comprises a mounting plate (411), a connecting column (412), a driving tool connecting shaft column (413) and a square column (414); the driving tool connecting shaft column (413) is provided with the square column (414) at one end and the mounting plate (411) is provided at the other end; the mounting plate (411) is provided with two connecting columns (412); the connecting columns (412) are embedded in the socket at the end of the belt roller (100).

8. A tensioning drive device based on a bidirectional ratchet structure according to claim 7, characterized in that: The driving tool (420) comprises a tool end cover (421), a tool disk (422), a driving handle (423) and a driving bidirectional ratchet mechanism (424); the tool end cover (421) and the tool disk (422) are connected by bolts; the tool end cover (421) and the tool disk (422) form a second installation body (425); the driving handle (423) and the tool disk (422) are an integrated structure; a connecting socket is penetrated through the tool end cover (421); the driving bidirectional ratchet mechanism (424) is rotatably arranged inside the second installation body (425); the square column (414) is inserted into the connecting socket and connected to the driving bidirectional ratchet mechanism (424).

9. A tensioning drive device based on a bidirectional ratchet structure according to claim 8, characterized in that: A second accommodating groove (4221) and a second installation groove (4222) are respectively provided on opposite ends of the tooling plate (422).

10. A tensioning drive device based on a bidirectional ratchet structure according to claim 9, characterized in that: The driving bidirectional ratchet mechanism (424) comprises a rotating shaft (4241), a driving gear (4242), a second bidirectional shifting block (4243), a second intermediate shifting block (4244), a second shifting installation shaft (4245), a second pawl installation shaft (4246), a second left pawl (4247), a second right pawl (4248) and a second restoring spring (4249); the rotating shaft (4241) is rotatably arranged at the center of the second installation body (425); a shaft (4241) is provided through the center of the rotating shaft (4241) so as to be aligned with the square column (41 4), the square column (414) is inserted into the square hole on the rotating shaft (4241) to connect with the driving two-way ratchet mechanism (424), the driving gear (4242) is installed on the rotating shaft (4241), the second shifting mounting shaft (4245) and the second ratchet mounting shaft (4246) are installed on the second mounting body (425), one end of the second shifting mounting shaft (4245) is provided with the second intermediate shifting block (4244), and the other end is provided with the second two-way shifting block (4243) ), the second two-way shift block (4243) is located in the second receiving groove (4221), the second left pawl (4247) and the second right pawl (4248) are respectively provided on the second pawl mounting shaft (4246), the second middle shift block (4244) is located between the second left pawl (4247) and the second right pawl (4248), the second middle shift block (4244), the second left pawl (4247) and the second right pawl (4248) are located in the second mounting groove (4222), and the second The left pawl (4247) and the second right pawl (4248) are pressed against the teeth of the driving gear (4242), and the second restoring spring (4249) is provided on the two opposite inner sides of the second mounting groove (4222), one end of the second restoring spring (4249) is connected to the inner wall, and the other end is connected to the second left pawl (4247) / second right pawl, and the second two-way shift block (4243) is moved to release the second left pawl (4247) or the second right pawl (4248) from pressing against the driving gear (4242).

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