A range-extending belt tensioner

Abstract

The application discloses a range-extending belt tensioning device, which comprises a transmission mechanism and a tensioning mechanism. The transmission mechanism comprises a fixed support, support supports arranged on the outer surfaces of the two ends of the fixed support, bearing seats mounted on the outer surfaces of the support supports, a roller connected to one end of the bearing seat, a motor arranged on the other end of the bearing seat and used for outputting the rotation of the roller, a transmission belt connected to the outer surface of the roller, and a support assembly fixed to the fixed support and matched with the transmission belt. The range-extending belt tensioning device can flexibly adjust the required tensioning force of the rubber belt conveyor by using counterweights, and has a good tensioning effect on the belt tensioning of the rubber belt conveyor with a short stroke.

Description

Technical Field

[0001] The present invention relates to the field of cargo transport technology, and more particularly to a range-extended belt tensioning device. Background Technology

[0002] During coal mining, due to the excavation of dedicated drainage channels, two belt conveyors are often used in an "L" shape to overlap for coal discharge. Among them, the No. 1 belt conveyor has a shorter transport distance. During the overlapping use of the belt conveyors, the No. 1 belt conveyor cannot be equipped with the mine's matching belt tensioning device due to its short stroke. After installation, the belt is prone to loosening and deviation. Adjustment can only be made by remaking the belt joint or pulling the tail of the machine. The adjustment methods are cumbersome and ineffective. In order to improve this passive situation of difficulty in tensioning after the installation of this short belt, a range-extended belt tensioning device was developed by taking advantage of the principle of increasing the belt stroke to achieve belt tension. Summary of the Invention

[0003] In view of the problems existing in the above-mentioned range-extended belt tensioning devices, the present invention is proposed.

[0004] Therefore, the purpose of this invention is to provide a range-extended belt tensioning device, which aims to increase the belt travel according to actual conditions to achieve belt tensioning.

[0005] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a transmission mechanism and a tensioning mechanism are included. The transmission mechanism includes a fixed bracket, support brackets disposed on the outer surfaces of both ends of the fixed bracket, bearing seats mounted on the outer surface of the support bracket, a roller connected to one end of the bearing seat, a motor disposed at the other end of the bearing seat and used to output the rotation of the roller, a transmission belt connected to the outer surface of the roller, and a support assembly fixed to the fixed bracket and cooperating with the transmission belt. The tensioning mechanism is disposed on the outer surface of the fixed bracket and includes fixed plates disposed on both sides of the fixed bracket, a tensioning assembly disposed at one end of the fixed plate and extending into the fixed bracket to cooperate with the transmission belt, an auxiliary assembly extending to the outer surface of the fixed plate and cooperating with the transmission belt, and an air intake assembly disposed on the fixed plate.

[0006] In a preferred embodiment of the range-extending belt tensioning device of the present invention, the support assembly includes a fixed frame symmetrically and equally spaced on the fixed bracket, a first roller respectively disposed at one end of the symmetrical fixed frame, and a second roller disposed on the symmetrical first roller and connected to each other.

[0007] In a preferred embodiment of the extended-range belt tensioning device of the present invention, the first roller and the second roller are combined to form a contact section with the transmission belt. The contact section is divided into a first planar section, an inclined section and a second planar section. The inclined section is located between the first planar section and the second planar section, and the sum of the lengths of the first planar section and the second planar section is greater than that of the inclined section.

[0008] In a preferred embodiment of the extended belt tensioning device of the present invention, the second roller is inclined on the first roller via X1 or X2 in the Y2 direction, and there is an angle between the first roller and the second roller, wherein the angle is greater than 1° and less than 89°.

[0009] As a preferred embodiment of the range-extending belt tensioning device of the present invention, the tensioning assembly includes: a mounting shaft disposed on the outer surface of the fixed plate and extending to its other end; a tensioning roller disposed on one side of the mounting shaft and connected to the fixed plate for positioning; a ventilation groove formed in the tensioning roller; and an air bladder disposed in a groove formed in the middle of the tensioning roller; the portion of the tensioning roller that is in contact with the conveyor belt is a tensioning section, wherein the tensioning section is divided into a top-pressure section where the air bladder is located, and a first extrusion section and a second extrusion section at both ends of the top-pressure section; at the position where the air bladder needs to extend out of the tensioning roller, the extension surface of the groove of the tensioning roller is an inclined surface, and the top-pressure section and the inclined surface section are both intermediate sections.

[0010] As a preferred embodiment of the range-extending belt tensioning device of the present invention, the auxiliary component includes a hanging rod extending from one side of the fixed plate, an auxiliary rod disposed at one end of the hanging rod and extending from the other side of the fixed plate, a baffle fixedly disposed at one end of the hanging rod, a clamping component cooperating with the hanging rod, a moving component limited in the fixed plate and cooperating with the clamping component, and a pulling component fixedly disposed on the outer surface of the moving component.

[0011] In a preferred embodiment of the range-extended belt tensioning device of the present invention, a hanger can be installed on the outer surface of the hanging rod to increase the weight.

[0012] In a preferred embodiment of the range-extended belt tensioning device of the present invention, the air intake assembly includes a connector disposed at one end of the fixed plate and a vent hole opened on the fixed plate and extending through both sides, wherein the connector is disposed at one end of the vent hole.

[0013] As a preferred embodiment of the range-extending belt tensioning device of the present invention, the clamping component includes a compression spring fixed in the fixed plate, a push block disposed at one end of the compression spring, and a protrusion disposed on the outer surface of the push block.

[0014] The moving component includes a moving block confined within the fixed plate and a groove formed on the outer surface of the moving block;

[0015] The outer surface of the movable block can fit against the protrusion, and the width of the symmetrically arranged groove is greater than the width of the symmetrically arranged protrusion.

[0016] As a preferred embodiment of the range-extending belt tensioning device of the present invention, the pulling component includes a barrier rod fixed to the outer surface of the moving block and extending out of the fixed plate, a circular hole opened on the outer surface of the barrier rod, a handle provided at one end of the barrier rod, a one-way valve provided at one end of the barrier rod and coinciding with the center of the circular hole, and a return spring provided at the top of the barrier rod and connected to the fixed plate.

[0017] The beneficial effects of this invention are: the tension can be flexibly adjusted using counterweights according to the required tension of the conveyor belt, and it has a better tensioning effect for conveyor belts with shorter strokes. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Wherein:

[0019] Figure 1 This is a schematic diagram of the overall structure of the range-extended belt tensioning device of the present invention.

[0020] Figure 2 This is a schematic side sectional view of the overall structure of the range-extended belt tensioning device of the present invention.

[0021] Figure 3 This is a schematic diagram of the contact section distribution structure of the range-extended belt tensioning device of the present invention.

[0022] Figure 4 This is a schematic diagram of the front section of the tensioning roller structure of the range-extended belt tensioning device of the present invention.

[0023] Figure 5 This is a front sectional view of the tensioning section of the range-extended belt tensioning device of the present invention.

[0024] Figure 6 This is a schematic diagram of the overall front sectional structure of the range-extended belt tensioning device of the present invention.

[0025] Figure 7 This is a three-dimensional structural diagram of the clamping component of the range-extended belt tensioning device of the present invention.

[0026] Figure 8 The extended-range belt tensioning device of the present invention Figure 6 Enlarged structural diagram at point A in the middle.

[0027] Figure 9 This is a partial cross-sectional view of the fixing plate of the range-extended belt tensioning device of the present invention.

[0028] Figure 10 This is a schematic diagram illustrating the evolution of the clamping component in the range-extended belt tensioning device of the present invention.

[0029] Figure 11 This is a side sectional view of the auxiliary rod of the extended belt tensioning device of the present invention in contact with the transmission belt. Detailed Implementation

[0030] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0031] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the invention. Therefore, the invention is not limited to the specific embodiments disclosed below.

[0032] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that is mutually exclusive with other embodiments.

[0033] Secondly, the present invention is described in detail with reference to the schematic diagrams. When detailing the embodiments of the present invention, for ease of explanation, the cross-sectional views illustrating the device structure may be partially enlarged, not according to the usual scale. Furthermore, the schematic diagrams are merely examples and should not limit the scope of protection of the present invention. In addition, actual fabrication should include three-dimensional spatial dimensions of length, width, and depth.

[0034] Example 1

[0035] Reference Figures 1-5 The first embodiment of the present invention provides a range-extended belt tensioning device, which includes a transmission mechanism 100 and a tensioning mechanism 200.

[0036] The transmission mechanism 100 includes a fixed bracket 101, a support bracket 102 disposed on the outer surfaces of both ends of the fixed bracket 101, a bearing seat 103 mounted on the outer surface of the support bracket 102, a roller 104 connected to one end of the bearing seat 103, a motor 105 disposed at the other end of the bearing seat 103 and used to output the rotation of the roller 104, a transmission belt 106 connected to the outer surface of the roller 104, and a support assembly 107 fixed to the fixed bracket 101 and cooperating with the transmission belt 106.

[0037] During use, by passing the conveyor belt 106 around the drum 104 and the support assembly 107, and since the drum 104 is mounted on the bearing seat 103, the motor 105 on the support bracket 102 can drive the drum 104 to rotate, thereby enabling the drum 104 to drive the conveyor belt 106 to operate, so that the conveyor belt 106 transports the mined material.

[0038] Meanwhile, since the support components 107 are evenly spaced on the fixed bracket 101, they can provide auxiliary support and tension for the conveyor belt 106. This prevents the conveyor belt 106 from being subjected to excessive force due to its weight during transportation, thus preventing it from breaking. At the same time, the presence of multiple support components 107 provides initial tension to the conveyor belt 106, ensuring that it remains taut and does not become too loose, which would result in insufficient transmission force.

[0039] Furthermore, the tensioning mechanism 200, which is disposed on the outer surface of the fixed bracket 101, includes a fixed plate 201 disposed on both sides of the fixed bracket 101, a tensioning component 202 disposed at one end of the fixed plate 201 and extending into the fixed bracket 101 to cooperate with the conveyor belt 106, an auxiliary component 203 extending to the outer surface of the fixed plate 201 and cooperating with the conveyor belt 106, and an air intake component 205 disposed on the fixed plate 201.

[0040] By fixing plate 201, tensioning component 202 is limited, enabling secondary tensioning using tensioning component 202. At the same time, tertiary tensioning is achieved by setting auxiliary component 203. Under the symmetrical action of auxiliary component 203, a continuous tension force can be effectively maintained by hanging a weight on auxiliary component 203, thereby improving the overall tensioning device.

[0041] Example 2

[0042] Reference Figures 1-6This is the second embodiment of the present invention. The difference between this embodiment and the first embodiment is that the support component 107 includes a fixed frame 107a symmetrically and equally spaced on the fixed bracket 101, a first roller 107b respectively disposed at one end of the symmetrical fixed frame 107a, and a second roller 107c disposed on the symmetrical first roller 107b and connected to each other.

[0043] from Figure 3 As can be seen, the fixed frame 107a is symmetrically arranged on the fixed bracket 101, and two first rollers 107b are symmetrically arranged on the symmetrical fixed bracket 101. Through the symmetrical first rollers 107b, two symmetrical second rollers 107c are respectively arranged and connected to each other.

[0044] Compared to Embodiment 1, the first roller 107b and the second roller 107c are combined to form a contact section H with the conveyor belt 106. The contact section H is divided into a first planar section H1, an inclined section H2, and a second planar section H3. The inclined section H2 is located between the first planar section H1 and the second planar section H3, and the sum of the lengths of the first planar section H1 and the second planar section H3 is greater than that of the inclined section H2.

[0045] The first planar segment H1 and the second planar segment H3 form the inclined segment H2, which consists of two symmetrically connected second rollers 107c. During the conveying process of the conveyor belt 106, the weight of the material will press on the conveyor belt 106. By utilizing the inclined segment H2, the conveyor belt 106 can also be squeezed into the angle of the inclined segment H2 by the weight of the material, which is more suitable for conveying small objects such as coal and effectively ensures the safety during conveying.

[0046] Furthermore, the second roller 107c is inclined on the first roller 107b in the Y2 direction via X1 or X2. There is an angle α between the first roller 107b and the second roller 107c. The angle α is greater than 1° and less than 89°. By varying the angle α, the angle of the conveyor belt 106 that the first roller 107b and the second roller 107c cooperate with can adapt to different modes of material transportation, and the range of materials that can be carried varies.

[0047] During use, the tensioning assembly 202 includes a mounting shaft 202a disposed on the outer surface of the fixing plate 201 and extending to its other end, a tensioning roller 202b disposed on one side of the mounting shaft 202a and connected to the fixing plate 201 for positioning, a ventilation groove 202c opened in the tensioning roller 202b, and an airbag 202d disposed in a groove opened in the middle of the tensioning roller 202b.

[0048] Since the mounting shaft 202a is installed in the fixed plate 201 and cannot rotate, the part of its tail end connected to the tension roller 202b is provided with a limit rotation structure. Through this limit ring, the tension roller 202b can be installed on the fixed plate 201 through another shaft, so that it can rotate on the mounting shaft 202a. When the auxiliary component 203 fails, the airbag 202d can open, so that the airbag 202d expands and squeezes the conveyor belt 106, performing four tensioning operations to increase the tension.

[0049] Furthermore, the part of the tension roller 202b that is in contact with the conveyor belt 106 is the tension section G, which is divided into the top pressure section G2 where the airbag 202d is located, and the first extrusion section G1 and the second extrusion section G3 at both ends of the top pressure section G2; at the position where the airbag 202d needs to extend out of the tension roller 202b, the groove extension surface B of the tension roller 202b is an inclined surface, and the top pressure section G2 and the inclined section H2 are both intermediate sections.

[0050] During normal use, the first extrusion section G1, the top pressure section G2, and the second extrusion section G3 all tension and pressurize the conveyor belt 106 normally. Once the airbag 202d expands, it will extend out from the groove extension surface B. The top pressure section G2 tensions the conveyor belt 106 four times, and this tensioning position corresponds to the inclined section H2. This allows the airbag 202d to also pressurize the material pressure section when the conveyor belt 106 of the inclined section H2 is under normal material pressure, achieving uniform pressure and preventing the conveyor belt 106 of the inclined section H2 or the top pressure section G2 from becoming loose due to the weight of the material, resulting in insufficient tension and difficulty in transmission.

[0051] The remaining structure is the same as that in Example 1.

[0052] Example 3

[0053] Reference Figures 1-11 This is the third embodiment of the present invention. This embodiment differs from the second embodiment in that: the auxiliary component 203 includes a hanging rod 203a extending out of one side of the fixed plate 201, an auxiliary rod 203b disposed at one end of the hanging rod 203a and extending out of the other side of the fixed plate 201, a baffle 203c fixedly disposed at one end of the hanging rod 203a, a clamping component 203d cooperating with the hanging rod 203a, a moving component 203e limited in the fixed plate 201 and cooperating with the clamping component 203d, and a pulling component 203f fixedly disposed on the outer surface of the moving component 203e.

[0054] During use, a hanger 204 can be installed on the outer surface of the hanging rod 203a. The weight is increased by the hanger 204, which allows the hanging rod 203a to tension the conveyor belt 106 three times through the auxiliary rod 203b. Since the conveyor belt 106 itself has a limiting force, it can effectively prevent the hanging rod 203a from continuously driving the auxiliary rod 203b downward when the weight is increased, thus allowing the conveyor belt 106 to be continuously tensioned. The weight effectively ensures the tension of the conveyor belt 106.

[0055] The clamping component 203d includes a compression spring 203d-3 fixed in the fixing plate 201, a push block 203d-1 disposed at one end of the compression spring 203d-3, and a protrusion 203d-2 disposed on the outer surface of the push block 203d-1; the moving component 203e includes a moving block 203e-1 limited in the fixing plate 201 and a groove 203e-2 formed on the outer surface of the moving block 203e-1; the outer surface of the moving block 203e-1 can fit against the protrusion 203d-2, and the width of the groove 203e-2 is symmetrically arranged greater than the width of the protrusion 203d-2 symmetrically arranged.

[0056] As the conveyor belt 106 continues to loosen, the weight of the hanging component 204 will cause the hanging rod 203a to continue to descend. When the hanging rod 203a descends, it will cause the baffle 203c to continue to descend. At this time, the top of the hanging rod 203a will press against the inclined surface of the push block 203d-1. When the push block 203d-1 is subjected to the pressing force, it will move and compress the compression spring 203d-3 to retract and recharge.

[0057] When the inclined surface of the push block 203d-1 is squeezed and moves, it simultaneously drives the protrusion 203d-2 to move until it moves to the position of the groove 203e-2. Since the width of the groove 203e-2 is symmetrically set to be greater than the width of the protrusion 203d-2, the protrusion 203d-2 can no longer continuously squeeze the moving block 203e-1.

[0058] During use, the pulling component 203f includes a barrier rod 203f-1 fixed to the outer surface of the moving block 203e-1 and extending out of the fixing plate 201, a circular hole 203f-2 opened on the outer surface of the barrier rod 203f-1, a handrail 203f-3 provided at one end of the barrier rod 203f-1, a one-way valve 203f-4 provided at one end of the barrier rod 203f-1 and coinciding with the center of the circular hole 203f-2, and a return spring 203f-5 provided at the top of the barrier rod 203f-1 and connected to the fixing plate 201.

[0059] When the moving block 203e-1 is not squeezed and limited, the force of the return spring 203f-5 will always pull the blocking rod 203f-1 and the moving block 203e-1 connected to it. Once the moving block 203e-1 loses its limiting force, the return spring 203f-5 will drive the moving block 203e-1 to move upward, thereby driving the circular hole 203f-2 and the one-way valve 203f-4 to move upward.

[0060] Compared to Embodiment 2, the intake assembly 205 further includes a connector 205a disposed at one end of the fixed plate 201 and a vent hole 205b opened on the fixed plate 201 and extending through both sides, with the connector 205a disposed at one end of the vent hole 205b.

[0061] When the circular hole 203f-2 and the one-way valve 203f-4 move upward, they will coincide with the vent hole 205b. At this time, when the connector 205a is inflated, the air will pass through the circular hole 203f-2 and the one-way valve 203f-4 into the vent hole 205b, and then enter the vent groove 202c from the vent hole 205b to inflate the airbag 202d, causing the airbag 202d to expand.

[0062] In daily use, the connector 205a can be pre-set with an air pump or have another air bag pre-installed on it. Since the vent 205b is blocked by the moving block 203e-1 during daily use, the air bag or air pump will only supply gas to the vent 205b under the effect of balance conservation when the vent 205b is released, similar to the principle of a faucet in this existing technology.

[0063] If the airbag 202d can no longer tighten the conveyor belt 106 after inflating, it means that the conveyor belt 106 is already unusable. Continuing to use the conveyor belt 106, which is tightened to such a degree, carries a certain risk of breakage and can serve as a warning.

[0064] When the device needs to be reused for replacing the conveyor belt 106, one hand can pull the handle 203f-3 downwards to move the moving block 203e-1 downwards to its initial position. At the same time, the other hand can pull the hanging rod 203a upwards to move the baffle 203c to stop squeezing the push block 203d-1. As a result, the push block 203d-1 will be pushed back to its original position by the compression spring 203d-3, allowing the protrusion 203d-2 to move away from the groove 203e-2 and squeeze the top surface of the moving block 203e-1. Thus, everything returns to its initial state, and the inflated airbag 202d can be deflated by the valve it has on its own, just like an inflated ball.

[0065] The remaining structure is the same as that in Example 2.

[0066] It is important to note that the constructions and arrangements of this application shown in several different exemplary embodiments are merely illustrative. Although only a few embodiments are described in detail in this disclosure, those who consult this disclosure will readily understand that many modifications are possible (e.g., changes in the size, dimensions, structure, shape, and proportions of various elements, as well as parameter values ​​(e.g., temperature, pressure, etc.), mounting arrangements, use of materials, color, orientation, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in this application). For example, an element shown as integrally formed may be composed of multiple parts or elements, the position of elements may be inverted or otherwise altered, and the nature or number or position of discrete elements may be changed or altered. Therefore, all such modifications are intended to be included within the scope of the invention. The order or sequence of any process or method steps may be changed or rearranged according to alternative embodiments. In the claims, any "device plus function" clause is intended to cover the structure described herein that performs the function, and not only structurally equivalent but also equivalent in structure. Other substitutions, modifications, alterations, and omissions may be made in the design, operation, and arrangement of the exemplary embodiments without departing from the scope of the invention. Therefore, the present invention is not limited to the specific embodiments, but extends to various modifications that still fall within the scope of the appended claims.

[0067] Furthermore, in order to provide a concise description of exemplary embodiments, not all features of actual embodiments (i.e., those features that are not relevant to the currently considered best mode for carrying out the invention, or those features that are not relevant to implementing the invention) may be omitted.

[0068] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A range-extended belt tensioning device, characterized in that: include, The transmission mechanism (100) includes a fixed bracket (101), a support bracket (102) disposed on the outer surfaces of both ends of the fixed bracket (101), a bearing seat (103) mounted on the outer surface of the support bracket (102), a roller (104) connected to one end of the bearing seat (103), a motor (105) disposed at the other end of the bearing seat (103) and used to output the rotation of the roller (104), a transmission belt (106) connected to the outer surface of the roller (104), and a support assembly (107) fixed to the fixed bracket (101) and cooperating with the transmission belt (106). The tensioning mechanism (200) is disposed on the outer surface of the fixed bracket (101) and includes a fixed plate (201) disposed on both sides of the fixed bracket (101), a tensioning component (202) disposed at one end of the fixed plate (201) and extending into the fixed bracket (101) to cooperate with the conveyor belt (106), an auxiliary component (203) extending to the outer surface of the fixed plate (201) and cooperating with the conveyor belt (106), and an air intake component (205) disposed on the fixed plate (201). The support assembly (107) includes a fixed frame (107a) symmetrically and equally spaced on the fixed bracket (101), a first roller (107b) respectively disposed at one end of the symmetrical fixed frame (107a), and a second roller (107c) disposed on the symmetrical first roller (107b) and connected to each other. The first roller (107b) and the second roller (107c) are combined to form a contact section (H) with the conveyor belt (106). The contact section (H) is divided into a first planar section (H1), an inclined section (H2), and a second planar section (H3). The inclined section (H2) is located between the first planar section (H1) and the second planar section (H3), and the sum of the lengths of the first planar section (H1) and the second planar section (H3) is greater than that of the inclined section (H2). The tensioning assembly (202) includes a mounting shaft (202a) disposed on the outer surface of the fixed plate (201) and extending to its other end, a tensioning roller (202b) disposed on one side of the mounting shaft (202a) and limitedly connected to the fixed plate (201), a ventilation groove (202c) formed in the tensioning roller (202b), and an airbag (202d) disposed in a groove formed in the middle of the tensioning roller (202b). The tensioning roller (202b) and the conveyor belt (106) are attached to the tensioning section (G), which is divided into the top pressure section (G2) where the airbag (202d) is located, and the first extrusion section (G1) and the second extrusion section (G3) at both ends of the top pressure section (G2). At the position where the airbag (202d) needs to extend out of the tension roller (202b), the groove extension surface (B) of the tension roller (202b) is an inclined surface, and the top pressure section (G2) and the inclined section (H2) are both middle sections. The auxiliary component (203) includes a hanging rod (203a) extending out of one side of the fixed plate (201), an auxiliary rod (203b) disposed at one end of the hanging rod (203a) and extending out of the other side of the fixed plate (201), a baffle (203c) fixedly disposed at one end of the hanging rod (203a), a clamping component (203d) cooperating with the hanging rod (203a), a moving component (203e) limited in the fixed plate (201) and cooperating with the clamping component (203d), and a pulling component (203f) fixedly disposed on the outer surface of the moving component (203e).

2. The range-extended belt tensioning device according to claim 1, characterized in that: The second roller (107c) is inclined on the first roller (107b) in the Y2 direction via X1 or X2, and there is an included angle (α) between the first roller (107b) and the second roller (107c), the included angle (α) being greater than 1° and less than 89°.

3. The range-extended belt tensioning device according to claim 2, characterized in that: The outer surface of the hanging rod (203a) can be fitted with a hanging piece (204) to increase the weight.

4. The range-extended belt tensioning device according to claim 3, characterized in that: The air intake assembly (205) includes a connector (205a) disposed at one end of the fixed plate (201) and a vent (205b) opened on the fixed plate (201) and extending through both sides, wherein the connector (205a) is disposed at one end of the vent (205b).

5. The range-extended belt tensioning device according to claim 4, characterized in that: The clamping component (203d) includes a compression spring (203d-3) fixed in the fixing plate (201), a push block (203d-1) disposed at one end of the compression spring (203d-3), and a protrusion (203d-2) disposed on the outer surface of the push block (203d-1). The moving component (203e) includes a moving block (203e-1) confined in the fixed plate (201) and a groove (203e-2) formed on the outer surface of the moving block (203e-1). The outer surface of the movable block (203e-1) can fit with the protrusion (203d-2), and the width of the groove (203e-2) is symmetrically arranged greater than the width of the protrusion (203d-2).

6. The range-extended belt tensioning device according to claim 5, characterized in that: The pulling component (203f) includes a barrier rod (203f-1) fixed to the outer surface of the moving block (203e-1) and extending out of the fixed plate (201), a circular hole (203f-2) opened on the outer surface of the barrier rod (203f-1), a handrail (203f-3) provided at one end of the barrier rod (203f-1), a one-way valve (203f-4) provided at one end of the barrier rod (203f-1) and coinciding with the center of the circular hole (203f-2), and a return spring (203f-5) provided at the top of the barrier rod (203f-1) and connected to the fixed plate (201).

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