Tensioning device

Abstract

The utility model relates to the technical field of harvesting machinery, in particular to a tensioning device which comprises a tensioning spring, a pull rod, an adjusting nut assembly, a fixing support and a control component, the pull rod is connected with the tensioning spring, and the adjusting nut assembly is installed on the pull rod; the fixed support is mounted on a second target object, and a first mounting through hole and a second mounting through hole are formed in the fixed support; a guide through hole is formed in the operating component, so that inserting parts are formed on the two sides of the end part of the guide through hole; the pull rod is movably mounted in the guide through hole; and along with the overturning of the operating component, the inserting part can be inserted into or moved out of the first mounting through hole, so that the pull rod is mounted in or moved out of the second mounting through hole of the fixed bracket. According to the novel tensioning device, the tensioning degree of the spring can be rapidly adjusted only by changing the state of the control component, operations such as mounting and dismounting of the spring can be completed, the operation is simple and convenient, time and labor are saved, and the working efficiency of the harvesting machine can be improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of harvesting machinery, in particular to a tensioning device. BACKGROUND

[0002] At present, when adjusting the tensioning degree of the spring of the tensioning device, the harvesting machinery needs to move the position of the tensioning adjusting nut to make the tensioning spring reach the required tensioning degree; when disassembling the belt, the harvesting machinery needs to disassemble the tensioning adjusting nut to make the tensioning device loose and can be disassembled, so as to complete the disassembly of the belt.

[0003] For the position which needs to frequently adjust the tensioning degree of the spring of the tensioning device and disassemble the belt, it is very inconvenient to frequently move and disassemble the tensioning adjusting nut, the tensioning adjusting nut is difficult to be screwed due to the force of the tensioning device, needs to be disassembled by using a wrench, and depends on tools and is time-consuming and laborious. CONTENT OF THE UTILITY MODEL

[0004] The purpose of the present application is to provide a tensioning device, which solves the technical problem in the prior art that the harvesting machinery needs to disassemble the tensioning adjusting nut when adjusting the tensioning degree of the spring of the tensioning device, which needs to be disassembled by using a wrench and is time-consuming and laborious.

[0005] The present application provides a tensioning device, comprising a tensioning spring, a pull rod, an adjusting nut assembly, a fixed support and a control member; wherein one end of the pull rod is connected with one end of the tensioning spring, the adjusting nut assembly is installed on the pull rod, and the other end of the tensioning spring is connected with a first target object; the fixed support is installed on a second target object, the fixed support is formed with a first installation through hole and a second installation through hole which penetrate through both sides of the fixed support along a first preset direction, and the second installation through hole penetrates through one side of the fixed support along a second preset direction;

[0006] The control member is formed with a guide through hole penetrating through one end thereof, so that both sides of the end of the guide through hole are formed with an insertion part, and the insertion part is used for being inserted in the first installation through hole; the pull rod is movably installed in the guide through hole, and the adjusting nut assembly and the tensioning spring are located on both sides of the guide through hole respectively; with the turning of the control member, the insertion part can be inserted into or moved out of the first installation through hole of the fixed support, so that the pull rod is installed into or moved out of the second installation through hole of the fixed support.

[0007] Further, the operating member comprises a holding portion, a flat portion and a plug-in portion connected in sequence, and the plug-in portion and the holding portion are arranged on opposite sides of the flat portion; the guide through hole comprises a first guide through hole, a second guide through hole and a third guide through hole connected in sequence, and the first guide through hole is formed in the holding portion, the second guide through hole is formed in the flat portion, and the third guide through hole is formed in the plug-in portion; the plug-in portion is arranged in the first mounting through hole, and the flat portion is arranged on the fixed support.

[0008] Further, the plug-in portion is an arc-shaped structure curved towards the flat portion.

[0009] Further, the flat portion and the holding portion are arranged perpendicularly, and the connection part therebetween is a circular arc transition.

[0010] Further, the plug-in portion, the flat portion and the holding portion all have a plate structure.

[0011] Further, the fixed support comprises a first support plate and a second support plate connected; the first support plate is arranged on the second target object; the first mounting through hole and the second mounting through hole are both formed in the second support plate, and both penetrate the second support plate along the thickness direction of the second support plate; and the second mounting through hole penetrates one side of the second support plate.

[0012] Further, the first support plate and the second support plate are arranged perpendicularly to form an L-shaped structure.

[0013] Further, the adjusting nut assembly comprises an adjusting nut and a locking nut; the pull rod is formed with an external thread; the adjusting nut and the locking nut are sequentially arranged outside the pull rod and are both threadedly connected with the pull rod; and the locking nut is arranged away from the tension spring.

[0014] Further, the adjusting nut is a T-shaped nut, and the barrel portion of the T-shaped nut can be arranged in the second mounting through hole.

[0015] Further, the adjusting nut assembly further comprises a limiting washer, and the limiting washer is movably arranged outside the pull rod and abuts against the side of the adjusting nut away from the locking nut.

[0016] Further, one end of the pull rod away from the adjusting nut assembly is formed with a mounting ring, one end of the tension spring is formed with a hook part, and the hook part is detachably hung in the mounting ring.

[0017] Compared with the prior art, the application has the following beneficial effects:

[0018] The application provides a novel tensioning device, which can quickly adjust the tensioning degree of the spring by changing the state of the operating member, complete the installation and disassembly and other operations, and is simple, convenient, time-saving and labor-saving, and helps to improve the working efficiency of the harvesting machine. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the specific embodiments or prior art, the drawings needed to be used in the specific embodiments or prior art description will be briefly introduced. Obviously, the drawings in the following description are some embodiments of the application, and other drawings can be obtained by those skilled in the art without creative labor.

[0020] Figure 1 The schematic diagram of the installation process of the tensioning device provided by the embodiment of the application is shown in the figure.

[0021] Figure 2 The schematic diagram of the installation process of the tensioning device provided by the embodiment of the application is shown in the figure.

[0022] Figure 3 The schematic diagram of the installation process of the tensioning device provided by the embodiment of the application is shown in the figure.

[0023] Figure 4 The schematic diagram of the installation process of the tensioning device provided by the embodiment of the application is shown in the figure. Figure 3 The enlarged structural schematic diagram at A is shown in the figure.

[0024] Figure 5 The structural schematic diagram of the operating member provided by the embodiment of the application is shown in the figure.

[0025] Figure 6 The structural schematic diagram of the operating member provided by the embodiment of the application is shown in the figure.

[0026] Figure 7 The structural schematic diagram of the operating member provided by the embodiment of the application is shown in the figure.

[0027] Figure 8 The structural schematic diagram of the operating member provided by the embodiment of the application is shown in the figure.

[0028] Figure 9 The structural schematic diagram of the operating member provided by the embodiment of the application is shown in the figure.

[0029] Reference signs:

[0030] 1-Tension spring, 11-Hook part, 2-Pull rod, 21-Mounting ring, 3-Adjusting nut assembly, 31-Adjusting nut, 32-Locking nut, 33-Limiting washer, 4-Fixed bracket, 41-First support plate, 42-Second support plate, 43-First mounting through hole, 44-Second mounting through hole, 5-Operating component, 51-Grip part, 52-Flat part, 53-Plug-in part, 54-Guide through hole, 541-First guide through hole, 542-Second guide through hole, 543-Third guide through hole. Detailed Implementation

[0031] The technical solutions of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some embodiments of this application, but not all embodiments.

[0032] The components of the embodiments of this application described and shown in the accompanying drawings can be arranged and designed in a variety of different configurations. Therefore, the following detailed description of the embodiments of this application provided in the drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application.

[0033] Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0034] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0035] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0036] The following reference Figures 1 to 9 This application describes a tensioning device according to some embodiments.

[0037] Referring to Figures 1 to 9 As shown in the drawings, the embodiment of the present application provides a tensioning device, comprising a tensioning spring 1, a pull rod 2, an adjusting nut assembly 3, a fixing bracket 4 and a manipulating member 5; wherein one end of the pull rod 2 is connected with one end of the tensioning spring 1, and the adjusting nut assembly 3 is installed on the pull rod 2, and the other end of the tensioning spring 1 is connected with a first target object; the fixing bracket 4 is installed on a second target object, and the fixing bracket 4 is formed with a first mounting through hole 43 and a second mounting through hole 44 which penetrate through two sides of the fixing bracket 4 along a first preset direction a, and the second mounting through hole 44 penetrates through one side of the fixing bracket 4 along a second preset direction b;

[0038] The manipulating member 5 is formed with a guide through hole 54 which penetrates through one end of the manipulating member 5, so that two sides of the end of the guide through hole 54 are formed with insertion parts 53, and the insertion parts 53 are used for being inserted in the first mounting through hole 43; the pull rod 2 is movably installed in the guide through hole 54, and the adjusting nut assembly 3 and the tensioning spring 1 are respectively located on two sides of the guide through hole 54; with the manipulating member 5 being turned over, the insertion parts 53 can be inserted into or moved out of the first mounting through hole 43 of the fixing bracket 4, so that the pull rod 2 is installed into or moved out of the second mounting through hole 44 of the fixing bracket 4.

[0039] According to the above-described structure, the installation and dismounting process of the tensioning device provided by the present application is as follows:

[0040] When assembling the device, the adjusting nut assembly 3 can be adjusted to a position close to the required tensioning position in advance, and then the pull rod 2 is moved inwards along the guide through hole 54 of the manipulating member 5, at this time the adjusting nut assembly 3 is clamped at one end of the manipulating member 5; the insertion parts 53 of the manipulating member 5 are aligned with the first mounting through hole 43 on the fixing bracket 4, the manipulating member 5 is rotated along the fulcrum of the insertion parts 53, forming a labor-saving lever, and the gripping part 51 end of the manipulating member 5 is easily pried upwards, so that the pull rod 2 and the adjusting nut assembly 3 are moved to the fixing bracket 4 along the guide through hole 54 of the manipulating member 5, and finally the manipulating member 5 and the fixing bracket 4 are assembled in place, at the same time, the pull rod 2 locks and fixes the manipulating member 5 in the working position under the tensioning force of the tensioning spring 1, so as to realize the rapid installation of the device.

[0041] When the tensioning degree of the tensioning spring 1 needs to be adjusted, the holding end of the operating member 5 is moved downward, the operating member 5 is rotated along the contact point of the operating member 5 and the fixed support 4, a force-saving lever is formed, the pull rod 2 and the adjusting nut assembly 3 are moved along the guide through hole 54 of the operating member 5 to the holding end of the operating member 5, the pull rod 2 is moved out of the second mounting through hole 44, at this time, the tensioning spring 1 is not tensioned, and the position of the adjusting nut assembly 3 can be adjusted easily; when the device needs to be disassembled, the operating member 5 is further removed from the fixed support 4, the pull rod 2 is moved out of the second mounting through hole 44, and the device can be disassembled quickly.

[0042] It can be seen that the tensioning device provided by the application can quickly adjust the tensioning degree of the spring, quickly complete the installation and disassembly of the device, and is simple, convenient, time-saving and labor-saving, and helps to improve the working efficiency of the harvesting machine.

[0043] It should be noted that the first target object can be a tensioning arm, that is, the other end of the tensioning spring 1 is connected to the tensioning arm to provide a spring tension to the tensioning arm, and the tensioning arm is a part of the existing structure of the harvesting machine, which will not be described in detail here.

[0044] In addition, the second target object can be a threshing machine body of the harvesting machine, that is, the fixed support 4 is fixed to the side wall of the threshing machine body of the harvesting machine.

[0045] Of course, it is not limited to this, and the first target object and the second target object can be freely selected according to actual needs.

[0046] In this embodiment, preferably, as shown in Figures 1 to 7 The operating member 5 comprises a holding portion 51, a planar portion 52 and a plug-in portion 53 connected in sequence, and the plug-in portion 53 and the holding portion 51 are arranged on opposite sides of the planar portion 52; the guide through hole 54 comprises a first guide through hole 541, a second guide through hole 542 and a third guide through hole 543 connected in sequence, the first guide through hole 541 is formed in the holding portion 51, the second guide through hole 542 is formed in the planar portion 52, and the third guide through hole 543 is formed in the plug-in portion 53; the plug-in portion 53 is arranged in the first mounting through hole 43, and the planar portion 52 is arranged on the fixed support 4.

[0047] According to the above structure, the insertion part 53 of the operating member 5 is mainly inserted into the first installation through hole 43 of the fixed support 4 and can rotate along the first installation through hole 43. When the insertion part 53 is assembled into the first installation through hole 43, the flat part 52 can be just placed on the fixed support 4 (and preferably, at this time, the flat part 52 is parallel to the horizontal plane, of course, not limited to this), that is, the stable assembly of the operating member 5 and the fixed support 4 is realized. The holding part 51 is mainly used for the operator to hold and facilitate the operator to rotate the operating member 5. Further, preferably, the holding part 51, the flat part 52 and the insertion part 53 are integrated, the overall strength is high, not easy to damage, long service life, of course, not limited to this, the holding part 51, the flat part 52 and the insertion part 53 can also be a split structure, which can be connected by welding or the like.

[0048] In this embodiment, preferably, as shown in Figure 1 、 Figure 5 and Figure 6 , the insertion part 53 is an arc-shaped structure curved towards the side of the flat part 52.

[0049] According to the above structure, the insertion part 53 adopts an arc-shaped structure, and it is curved towards the side of the flat part 52, that is, the center of the arc-shaped insertion part 53 is located on the side of the flat part 52, so that during the assembly of the insertion part 53 and the first installation through hole 43, no interference occurs and the assembly can be smoothly completed, improving the convenience of operation.

[0050] In this embodiment, preferably, as shown in Figure 1 and Figure 5 , the flat part 52 is arranged perpendicularly to the holding part 51, and the connection between the two is a circular arc transition.

[0051] According to the above structure, when the flat part 52 is placed on the surface of the top of the fixed support 4, for example, the flat part 52 is located on the horizontal plane, if the holding part 51 is arranged perpendicularly to the flat part 52, at this time, the holding part 51 is arranged along the vertical direction, that is, it is located in the vertical direction together with the pull rod 2, so that the assembly of the operating member 5 and the fixed support 4 is more stable, and displacement and the like will not occur due to inclination and the like, the structure is more reliable, and the connection between the flat part 52 and the holding part 51 is a circular arc transition, avoiding the generation of sharp corner structure, on the one hand, it can avoid interference during assembly, on the other hand, it can avoid stress concentration, which is helpful to prolong the service life and the like.

[0052] It should be noted that the structure in which the flat part 52 is perpendicular to the holding part 51 is not limited to the above, and the holding part 51 and the flat part 52 can form an acute angle and the like, which is selected according to actual needs.

[0053] In this embodiment, preferably, as shown in Figure 5And Figure 6 As shown in the figure, the insertion part 53, the flat part 52 and the holding part 51 all have a plate structure.

[0054] According to the above-described structure, the operating member 5 as a whole has a plate structure with a certain width, which helps to improve the strength, and increases the contact area when assembled with other components, so that the structure after assembly is more stable, and it is more convenient for the operator to hold, of course, not limited to this.

[0055] In this embodiment, preferably, as shown in Figure 2 , Figure 8 and Figure 9 The fixed support 4 comprises a first support plate 41 and a second support plate 42 connected; the first support plate 41 is used to be installed on the second target object; the first mounting hole 43 and the second mounting hole 44 are both formed on the second support plate 42, and both penetrate the second support plate 42 along the thickness direction of the second support plate 42, and the second mounting hole 44 penetrates one side of the second support plate 42.

[0056] According to the above-described structure, the fixed support 4 is designed to be composed of two support plates, one of which, i.e. the first support plate 41, is used to be installed on the second target object, and the other, i.e. the second support plate 42, is used to support the tension rod 2.

[0057] In this embodiment, preferably, as shown in Figure 8 and Figure 9 The first support plate 41 and the second support plate 42 are arranged perpendicularly to form an L-shaped structure.

[0058] According to the above-described structure, the fixed support 4 is designed to be L-shaped, which plays a role of adapter, and the structure is simple, convenient for processing and manufacturing and installation.

[0059] It should be noted that the structure of the fixed support 4 is not limited to the above, but can be designed according to actual needs.

[0060] In this embodiment, preferably, as shown in Figure 4 The adjusting nut assembly 3 comprises an adjusting nut 31 and a locking nut 32; the tension rod 2 is formed with external threads, the adjusting nut 31 and the locking nut 32 are sequentially sleeved on the outside of the tension rod 2, and are both threadedly connected with the tension rod 2, and the locking nut 32 is arranged away from the tension spring 1.

[0061] According to the above-described structure, the adjusting nut 31 can be adjusted on the tension rod 2 according to actual needs, so as to adjust the tensioning degree of the tension spring 1, and the locking nut 32 is used to fix the adjusting nut 31 at a specified position.

[0062] Further preferably, a gasket or the like structure can also be arranged between the adjusting nut 31 and the locking nut 32, which is specifically designed according to the needs.

[0063] In this embodiment, preferably, as shown in the drawings, the adjusting nut 31 is a T-shaped nut, and the cylindrical portion of the T-shaped nut can be inserted into the second mounting hole 44 to play a positioning role. Of course, it is not limited to this, and the adjusting nut 31 can also be a common nut. Figure 4

[0064] In this embodiment, preferably, as shown in the drawings, the adjusting nut assembly 3 further comprises a limiting gasket 33, and the limiting gasket 33 is movably sleeved on the outside of the pull rod 2 and abuts against the side of the adjusting nut 31 away from the locking nut 32. Figure 4 According to the above-described structure, when the adjusting nut assembly 3, the operating member 5 and the fixed bracket 4 are assembled in place, the limiting gasket 33 abuts against the upper surface of the aforementioned planar portion 52 to play a limiting role. Especially when the adjusting nut 31 is a T-shaped nut, the cylindrical portion of the T-shaped nut passes through the limiting gasket 33 and is sequentially inserted into the second guide hole 542 and the second mounting hole 44.

[0065] In this embodiment, preferably, as shown in the drawings, the end of the pull rod 2 away from the adjusting nut assembly 3 is formed with a mounting ring 21, and the end of the tension spring 1 is formed with a hook portion 11, and the hook portion 11 is detachably hung in the mounting ring 21.

[0066] Figure 2 Figure 2 According to the above-described structure, the mounting ring 21 is designed at one end of the pull rod 2, the hook portion 11 is designed at one end of the tension spring 1, and the hook portion 11 can be detachably mounted in the mounting ring 21, thereby facilitating installation and disassembly, especially facilitating later maintenance.

[0067] According to the above-described structure, the mounting ring 21 is designed at one end of the pull rod 2, the hook portion 11 is designed at one end of the tension spring 1, and the hook portion 11 can be detachably mounted in the mounting ring 21, thereby facilitating installation and disassembly, especially facilitating later maintenance.

[0068] In summary, the detailed installation, disassembly and adjustment process of the tensioning device provided by the present application is as follows:

[0069] ​​When assembling the device, the adjusting nut assembly 3 can be adjusted to the appropriate position required for tensioning in advance, and then the pull rod 2 is moved along the guide hole 54 of the operating member 5 to the innermost side, at which time the adjusting nut assembly 3 is clamped at one end of the operating member 5; the insertion part 53 of the operating member 5 is aligned with the first mounting hole 43 on the fixed support 4, and the holding part 51 end of the operating member 5 is pried upward with the insertion part 53 of the operating member 5, i.e., the arc-shaped part as the fulcrum, so that the pull rod 2 and the adjusting nut assembly 3 move along the guide hole 54 of the operating member 5 to the fixed support 4, and finally the flat part 52 of the operating member 5 is seated on the top flat surface of the fixed support 4, and at the same time, the pull rod 2 locks and fixes the operating member 5 in the working position under the tensioning force of the tensioning spring 1, so as to realize the quick installation of the device.

[0070] After the device is installed and fixed, when the tensioning degree of the tensioning spring 1 of the device needs to be adjusted, the holding part 51 of the operating member 5 is pried downward, so that the pull rod 2 and the adjusting nut assembly 3 move along the guide hole 54 of the operating member 5 to the holding part 51 end of the operating member 5, at which time the tensioning spring 1 is no longer tensioned, and the position of the adjusting nut assembly 3 can be easily adjusted; when the device needs to be disassembled, the operating member 5 is further removed from the fixed support 4, and the pull rod 2 and the adjusting nut assembly 3 are taken out along the guide hole 54 of the operating member 5, so as to complete the quick disassembly of the device.

[0071] It can be seen that the present application provides a novel tensioning device, which can quickly adjust the tensioning degree of the spring, complete the installation and disassembly of itself, and the like, is simple and convenient, saves time and effort, and helps to improve the working efficiency of the harvesting machine.

[0072] It should be noted that the first preset direction a can be a vertical direction, and the second preset direction b can be an X direction in a horizontal plane, but is not limited thereto.

[0073] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, and are not limited thereto; although the present application has been described in detail with reference to the above embodiments, those skilled in the art should understand that the technical solutions recorded in the above embodiments can be modified, or some or all of the technical features can be replaced equivalently; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A tensioning device, characterized in that The tension spring, the pull rod, the adjusting nut assembly, the fixing support and the operating member are included, wherein one end of the pull rod is connected with one end of the tension spring, the adjusting nut assembly is installed on the pull rod, the other end of the tension spring is connected with the first target object, the fixing support is installed on the second target object, the fixing support is formed with a first installation through hole and a second installation through hole penetrating through two sides of the fixing support along a first preset direction, and the second installation through hole penetrates through one side of the fixing support along a second preset direction; The operating member is formed with a guide through hole penetrating through one end of the operating member, so that both sides of the end of the guide through hole are formed with insertion parts, and the insertion parts are used for being inserted in the first installation through hole; the pull rod is movably installed in the guide through hole, and the adjusting nut assembly and the tension spring are respectively located on both sides of the guide through hole; with the turning of the operating member, the insertion parts can be inserted into or moved out of the first installation through hole of the fixing support, so that the pull rod is installed into or moved out of the second installation through hole of the fixing support. The operating member includes a holding part, a flat part and an insertion part connected in sequence, and the insertion part and the holding part are respectively arranged on opposite sides of the flat part; the guide through hole includes a first guide through hole, a second guide through hole and a third guide through hole connected in sequence, and the first guide through hole is formed in the holding part, the second guide through hole is formed in the flat part, the third guide through hole is formed in the insertion part, and the insertion part is used for being inserted in the first installation through hole, and the flat part is used for being seated on the fixing support.

2. The tensioning device of claim 1, wherein, The insertion part is an arc-shaped structure curved towards the flat part side.

3. A tensioning device according to claim 2, characterized in that The flat part and the holding part are arranged perpendicularly, and the connection part is a circular arc transition.

4. The tensioning device of claim 2, wherein, The insertion part, the flat part and the holding part all have a plate structure.

5. The tensioning device of claim 2, wherein, The fixing support includes a first support plate and a second support plate connected; wherein the first support plate is used for being installed on the second target object; the first installation through hole and the second installation through hole are both formed in the second support plate and penetrate through the second support plate along the thickness direction of the second support plate, and the second installation through hole penetrates through one side of the second support plate.

6. The tensioning device of claim 1, wherein, The first support plate and the second support plate are arranged perpendicularly to form an L-shaped structure.

7. A tensioning device according to claim 6, characterized in that The adjusting nut assembly includes an adjusting nut and a locking nut; wherein the pull rod is formed with an external thread, the adjusting nut and the locking nut are sequentially sleeved on the outside of the pull rod, and are both threadedly connected with the pull rod, and the locking nut is arranged away from the tension spring.

8. The tensioning device of claim 1, wherein, The adjusting nut is a T-shaped nut, and the cylindrical part of the T-shaped nut can be inserted into the second installation through hole; and / or 9. A tensioning device according to claim 8, characterized in that The adjusting nut assembly further includes a limiting washer, and the limiting washer is movably sleeved on the outside of the pull rod and abuts against the side of the adjusting nut away from the locking nut. ​ 10. A tensioning device according to any one of claims 1 to 9, characterized in that One end of the pull rod, which is away from the adjusting nut assembly, is formed with a mounting ring, one end of the tension spring is formed with a hook portion, and the hook portion is detachably hung in the mounting ring.

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