Tensioning mechanism and photovoltaic cleaning robot

Abstract

The utility model discloses a tensioning mechanism and a photovoltaic cleaning robot, and relates to the technical field of photovoltaic.The tensioning mechanism comprises a mounting base, a tensioning sliding block and a pushing mechanism; a limiting groove is formed in the mounting seat; the tensioning sliding block is arranged on one side of the mounting base and is in sliding fit with the limiting groove, a containing groove used for containing the traction piece is limited by the tensioning sliding block, and limiting blocking walls used for limiting deviation of the traction piece are formed on the two sides of the containing groove; the pushing mechanism is movably arranged on the mounting base and used for driving the tensioning sliding block to slide along the limiting groove so that the tensioning sliding block can tension the traction piece. According to the tensioning mechanism, sliding of the tensioning sliding block can be limited through the limiting groove in the mounting base, inclination caused by large stress is avoided, meanwhile, the derailing phenomenon caused by stretching of a traction piece after long-time operation can be effectively avoided through the limiting blocking walls on the two sides of the containing groove in the tensioning sliding block, and the tensioning mechanism is more stable in operation. Therefore, the reliability of the tensioning mechanism is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of photovoltaic, more particularly, to a tensioning mechanism and a photovoltaic cleaning robot. BACKGROUND

[0002] The conventional photovoltaic cleaning robot usually adopts the transmission form of belt or chain, and in order to avoid the belt or chain from loosening during use, a chain wheel tensioning mechanism is usually provided, but due to the ductility of the belt or chain, the elongation of the belt or chain will cause the derailment of the chain wheel after a long time of running, and the chain wheel is easy to tilt when the force is large, thereby causing the tensioning failure.

[0003] Therefore, how to improve the reliability of the tensioning mechanism has become a technical problem to be solved by the person skilled in the art. CONTENT OF THE UTILITY MODEL

[0004] Therefore, the purpose of the present application is to provide a tensioning mechanism to improve the reliability of the tensioning mechanism.

[0005] Another purpose of the present application is to provide a photovoltaic cleaning robot with the above tensioning mechanism.

[0006] In order to achieve the above purpose, the present application provides the following technical scheme:

[0007] A tensioning mechanism, comprising:

[0008] A mounting seat, a limiting groove is arranged on the mounting seat;

[0009] A tensioning sliding block is arranged on one side of the mounting seat and is in sliding cooperation with the limiting groove, the tensioning sliding block limits an accommodating groove for accommodating a traction member, and limiting stop walls for limiting the deviation of the traction member are formed on both sides of the accommodating groove;

[0010] A pushing mechanism is movably arranged on the mounting seat, and the pushing mechanism is used to drive the tensioning sliding block to slide along the limiting groove, so that the tensioning sliding block tensions the traction member.

[0011] Optionally, in the above tensioning mechanism, the pushing mechanism comprises a tensioning shaft and a locking mechanism, the tensioning shaft is movably arranged on the mounting seat, the tensioning sliding block is provided with a connecting hole, the tensioning shaft cooperates with the connecting hole to drive the tensioning sliding block to slide, and the locking mechanism is used to lock the action of the tensioning shaft.

[0012] Optionally, in the above tensioning mechanism, the tensioning shaft is threadedly connected with the connecting hole; or,

[0013] The elastic reset member is arranged on the tightening shaft and located between the tightening sliding block and the mounting base.

[0014] Optionally, in the above tightening mechanism, a thrust member for stopping the movement of the tightening shaft is arranged on the tightening sliding block, and a thrust hole for cooperating with the thrust member is arranged on the tightening sliding block and communicates with the connecting hole perpendicularly.

[0015] Optionally, in the above tightening mechanism, the locking mechanism comprises a rotation limiting member and a locking nut threadedly cooperating with the tightening shaft, the rotation limiting member has a rotation limiting groove cooperating with the locking nut, and the rotation limiting member is connected to the mounting base by a fastener.

[0016] Optionally, in the above tightening mechanism, two locking nuts are arranged on both sides of the mounting base respectively, and the rotation limiting member comprises a connecting plate and two rotation limiting plates arranged on both sides of the connecting plate, the rotation limiting groove is arranged on both rotation limiting plates to make the two rotation limiting grooves cooperate with the locking nuts on both sides of the mounting base respectively.

[0017] Optionally, in the above tightening mechanism, the two side walls of the rotation limiting groove are arranged in parallel to the two opposite side faces of the locking nut.

[0018] Optionally, in the above tightening mechanism, the tightening sliding block comprises two sliding arms arranged in parallel, and the limiting groove is adapted to the sliding arms, and the sliding arms can slide along the limiting groove.

[0019] Optionally, in the above tightening mechanism, the accommodating groove extends from the end of one of the sliding arms to the end of the other sliding arm, and a boss for cooperating with the traction member is arranged in the accommodating groove.

[0020] A photovoltaic cleaning robot comprises a transmission box and the above tightening mechanism, and the tightening mechanism is installed in the transmission box.

[0021] The tensioning mechanism provided by the application can limit the sliding of the tensioning slider through the limiting groove on the mounting seat, avoid tilting when the force is large, and effectively avoid the derailment phenomenon caused by the elongation of the traction member after long-time operation, thereby improving the reliability of the tensioning mechanism.

[0022] The technical features mentioned above, the technical features mentioned below, and the technical features shown in the drawings alone can be combined with each other arbitrarily, as long as the combined technical features are not contradictory to each other. All feasible combinations of features are explicitly described herein. Any one of the multiple sub-features included in the same sentence can be applied independently, and does not have to be applied together with other sub-features. BRIEF DESCRIPTION OF DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced as follows. Obviously, the drawings in the following description are only embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative effort on the basis of the provided drawings.

[0024] Figure 1 An exploded view of the tensioning mechanism provided by the embodiments of the present application;

[0025] Figure 2 A first perspective view of the tensioning mechanism provided by the embodiments of the present application;

[0026] Figure 3 A second perspective view of the tensioning mechanism provided by the embodiments of the present application;

[0027] Figure 4 A third perspective view of the tensioning mechanism provided by the embodiments of the present application;

[0028] Figure 5 A fourth perspective view of the tensioning mechanism provided by the embodiments of the present application;

[0029] Figure 6 A fifth perspective view of the tensioning mechanism provided by the embodiments of the present application;

[0030] Figure 7 The sixth perspective view of the tensioning mechanism provided for the embodiment of the present application;

[0031] Figure 8 The first perspective view of the tensioning slider provided for the embodiment of the present application;

[0032] Figure 9 The second perspective view of the tensioning slider provided for the embodiment of the present application;

[0033] Figure 10 The third perspective view of the tensioning slider provided for the embodiment of the present application;

[0034] Figure 11 The fourth perspective view of the tensioning slider provided for the embodiment of the present application;

[0035] Figure 12 The fifth perspective view of the tensioning slider provided for the embodiment of the present application;

[0036] Figure 13 The first perspective view of the mounting seat provided for the embodiment of the present application;

[0037] Figure 14 The second perspective view of the mounting seat provided for the embodiment of the present application;

[0038] Figure 15 The third perspective view of the mounting seat provided for the embodiment of the present application;

[0039] Figure 16 The fourth perspective view of the mounting seat provided for the embodiment of the present application;

[0040] Figure 17 The assembly view of the tensioning mechanism and the transmission box provided for the embodiment of the present application.

[0041] Among them, 100 is the mounting seat, 101 is the limiting groove, 102 is the connecting body, 103 is the base, and 104 is the through hole;

[0042] 200 is the tensioning slider, 201 is the accommodating groove, 2011 is the limiting stop wall, 2012 is the boss, 202 is the connecting hole, 203 is the thrust piece, 204 is the thrust hole, 205 is the sliding support arm, 206 is the arc segment, 207 is the reinforcing table, and 208 is the weight-reducing notch;

[0043] 300 is the pushing mechanism, 301 is the tensioning shaft, 302 is the locking mechanism, 3021 is the locking nut, 3022 is the rotation limiting piece, 3023 is the rotation limiting groove, 3024 is the connecting plate, 3025 is the rotation limiting plate, and 303 is the reset elastic piece;

[0044] 400 is the traction piece;

[0045] 500 is a power unit;

[0046] 600 is a driven unit. DETAILED DESCRIPTION

[0047] The core of the present application is to provide a tensioning mechanism to improve the reliability of the tensioning mechanism.

[0048] Another core of the present application is to provide a photovoltaic cleaning robot with the above tensioning mechanism.

[0049] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of protection of the present application.

[0050] The conventional photovoltaic cleaning robot usually adopts a transmission form of belt or chain, and in order to avoid loosening of the belt or chain during use, a chain wheel tensioning mechanism is usually provided. However, since the belt or chain itself has ductility, the elongation of the belt or chain after long-time operation will cause derailment of the chain wheel, and the chain wheel is prone to tilting when the force on the chain wheel is large, thereby causing tensioning failure.

[0051] In addition, the chain wheel in the chain wheel tensioning mechanism needs to be a complete ring structure, which occupies a large space and is difficult to arrange in a transmission box with relatively compact space, and needs good lubrication conditions. For a photovoltaic power station project site, it is difficult to meet the ideal requirements.

[0052] Therefore, as shown in the drawings, Figure 1 The present application discloses a tensioning mechanism, which comprises a mounting seat 100, a tensioning sliding block 200 and a pushing mechanism 300. The sliding of the tensioning sliding block 200 is limited by the limiting groove 101 on the mounting seat 100, so as to avoid tilting when the force is large. At the same time, the derailment phenomenon caused by the elongation of the traction member 400 after long-time operation can be effectively avoided through the limiting stop wall 2011 on both sides of the accommodating groove 201 on the tensioning sliding block 200, thereby improving the reliability of the tensioning mechanism.

[0053] The tensioning mechanism disclosed in the embodiments of the present application will be specifically explained and described below. Figures 1 to 15 The tensioning mechanism disclosed in the embodiments of the present application will be specifically explained and described below.

[0054] Among them, as shown in the drawings, Figures 1 to 7As shown, the mounting base 100 can be provided with a limiting groove 101, and the tensioning slider 200 can be arranged on one side of the mounting base 100 and can slide along the limiting groove 101, and the limiting groove 101 can limit the tensioning slider 200 to avoid tilting when the force is large. In addition, the tensioning slider 200 is formed with an accommodating groove 201 accommodating the traction member 400, and the two sides of the accommodating groove 201 are formed with limiting stop walls 2011 capable of limiting the deviation of the traction member 400, so as to prevent the traction member 400 such as a belt or a chain from being stretched and deformed to separate from the tensioning slider 200 after long-term use. And the pushing mechanism 300 is movably arranged on the mounting base 100 to drive the tensioning slider 200 to slide along the limiting groove 101, so that the tensioning slider 200 can tension the traction member 400.

[0055] In some embodiments, when the traction member 400 loosens during use, the pushing mechanism 300 can drive the tensioning slider 200 to slide along the limiting groove 101 to tension the traction member 400, and the limiting groove 101 on the mounting base 100 can limit the sliding of the tensioning slider 200 to avoid tilting when the force is large, and the limiting stop walls 2011 on both sides of the accommodating groove 201 of the tensioning slider 200 can effectively prevent the traction member 400 from derailing due to elongation after long-term operation, thereby improving the reliability of the tensioning mechanism.

[0056] In some embodiments, as shown in Figures 13 to 16 , the mounting base 100 can include a connecting body 102 and a base 103 arranged perpendicularly to the connecting body 102. As shown in Figure 1 , the limiting groove 101 can be arranged on the side of the connecting body 102, so that the tensioning slider 200 can slide along the limiting groove 101 towards the direction perpendicular to the connecting body 102. At the same time, the mounting base 100 can be installed in the transmission box of the photovoltaic cleaning robot through the base 103 to fix the tensioning mechanism. Alternatively, as shown in Figure 13 and Figure 16 , one or more fixing holes can be arranged on the base 103 on both sides of the connecting body 102, so that the mounting base 100 can be fixed in the transmission box through bolts and other fasteners, as shown in Figure 17 .

[0057] In some embodiments, as shown in Figure 8 , Figure 9 and Figure 12As shown, the tensioning slider 200 can include two parallel sliding arms 205, and the limiting grooves 101 are adapted to the sliding arms 205, that is, there are two limiting grooves 101, and the two limiting grooves 101 are respectively located on the two sides of the connecting body 102, so that the two sliding arms 205 can slide along the two limiting grooves 101 respectively, to ensure the stability of the sliding of the tensioning slider 200 along the limiting grooves 101. Moreover, the two sliding arms 205 are connected by an arc-shaped segment 206, to better adapt to the traction member 400. For the convenience of understanding, the side opposite to the two sliding arms 205 is defined as the inner side of the tensioning slider 200, and the side away from the two sliding arms 205 is defined as the outer side of the tensioning slider 200. As shown in Figure 8 As shown, the accommodating groove 201 can extend from the end of one sliding arm 205 to the end of the other sliding arm 205 along the outer side of the tensioning slider 200, so that the tensioning slider 200 can have a larger contact area with the traction member 400, to ensure the stability of the tensioning of the traction member 400 by the tensioning slider 200.

[0058] In some embodiments, as shown in Figures 8 to 11 When the traction member 400 is a chain, a boss 2012 that cooperates with the rollers of the chain can be arranged in the accommodating groove 201, so as to further avoid the phenomenon of derailment of the chain.

[0059] In some embodiments, in order to improve the service life of the tensioning slider 200, the tensioning slider 200 can be made of ultra-high molecular weight polyethylene (UPE) or polyoxymethylene (POM), so that the tensioning slider 200 has higher strength and wear resistance, and is lighter in weight and lower in cost, thereby reducing the pressure applied to the photovoltaic module by the photovoltaic cleaning robot, to meet the lightweight design requirement.

[0060] In some embodiments, as shown in Figure 1 The pushing mechanism 300 can include a tensioning shaft 301 and a locking mechanism 302, and the tensioning shaft 301 can be movably arranged on the mounting base 100, and the tensioning slider 200 is provided with a connecting hole 202, the tensioning shaft 301 can cooperate with the connecting hole 202 to drive the tensioning slider 200 to slide, and the locking mechanism 302 can be used to lock the movement of the tensioning shaft 301 in the direction perpendicular to the connecting body 102. Alternatively, as shown in Figure 13 and Figure 14 A through hole 104 can be arranged on the connecting body 102 of the mounting base 100, and the tensioning shaft 301 can pass through the through hole 104 and move in the direction perpendicular to the connecting body 102 along the through hole 104, as shown in Figure 1 and Figure 2 As shown in Figure 1 ,Figure 8 and Figure 12 As shown, a reinforcing platform 207 can be provided on the arc-shaped segment 206 between the two sliding arms 205 of the tensioning slider 200, facing inward towards the inner side of the tensioning slider 200, i.e., near the connecting body 102. A connecting hole 202 is provided on the end face of the reinforcing platform 207, thereby locally reinforcing the arc-shaped segment 206 through the reinforcing platform 207, preventing penetration of the arc-shaped segment 206 when the connecting hole 202 is opened. Furthermore, as... Figure 8 and Figure 12 As shown, weight-reducing recesses 208 can be provided on both sides of the reinforcing platform 207 to further reduce the weight of the tensioning slider 200.

[0061] In some embodiments, the connecting hole 202 of the tensioning slider 200 may be a threaded hole, and the end of the tensioning shaft 301 may be provided with a threaded portion, so that the tensioning shaft 301 can be threadedly connected to the connecting hole 202. When the traction member 400 becomes loose due to elongation during use, the tensioning shaft 301 can be moved to drive the tensioning slider 200 to move away from the connecting body 102 of the mounting base 100, thereby tensioning the traction member 400 through the tensioning slider 200, and then locking the movement of the tensioning shaft 301 through the locking mechanism 302.

[0062] In some embodiments, such as Figure 1As shown, the connecting hole 202 of the tensioning slider 200 can also be a light hole, and the end of the tensioning shaft 301 can be inserted into the connecting hole 202 and can move relative to the connecting hole 202 of the tensioning slider 200, and a reset elastic member 303 can be sleeved on the tensioning shaft 301, and the reset elastic member 303 is located between the tensioning slider 200 and the mounting seat 100, so that the two ends of the reset elastic member 303 can abut against the reinforcing table 207 of the tensioning slider 200 and the mounting seat 100, respectively. When the tensioning mechanism is installed, the traction member 400 is located in the accommodating groove 201 of the tensioning slider 200, the end of the tensioning shaft 301 is moved to push the tensioning slider 200 away from the connecting body 102 of the mounting seat 100, so that the traction member 400 is tensioned by the tensioning slider 200, and then the action of the locking mechanism 302 locks the tensioning shaft 301, and the reset elastic member 303 is in a compressed state, and the traction member 400 is in a tensioned state; when the traction member 400 is relaxed due to elongation during use, the reset elastic member 303 releases part of the elastic force, and under the guidance of the end of the tensioning shaft 301, the tensioning slider 200 is continuously pushed away from the connecting body 102 of the mounting seat 100, so that the traction member 400 is tensioned again, thereby realizing the self-adaptive tensioning function of the traction member 400. When the reset elastic member 303 returns to the normal state or the reset elastic member 303 fails, and the traction member 400 is loosened, the limiting stop wall 2011 on both sides of the accommodating groove 201 still limits the traction member 400 in the accommodating groove 201 of the tensioning slider 200, so that the traction member 400 can maintain its predetermined track operation, avoiding derailment of the traction member 400. It should be noted that the reset elastic member 303 can be a conventional compression spring.

[0063] In some embodiments, as shown in Figure 1 and Figure 2 As shown, the tensioning slider 200 is further provided with a thrust piece 203, and the tensioning slider 200 is provided with a thrust hole 204 matched with the thrust piece 203, the thrust hole 204 is communicated perpendicularly with the connecting hole 202, so that the thrust piece 203 can be inserted into the thrust hole 204 to stop the movement of the tensioning shaft 301 and prevent the tensioning shaft 301 from penetrating the tensioning slider 200. Alternatively, the thrust hole 204 can be a through hole arranged on the reinforcing table 207, and the thrust piece 203 can include a thrust bolt and a pin, and a pin hole is formed at the end of the thrust bolt to insert the pin. During installation, the thrust bolt can be inserted through the thrust hole 204, and the pin is inserted into the pin hole at the end of the thrust bolt, and part of the thrust bolt is located in the connecting hole 202, thereby stopping the movement of the tensioning shaft 301.

[0064] In some embodiments, as shown in Figures 1 to 3As shown, the locking mechanism 302 can include a rotation limiting member 3022 and a locking nut 3021 threadedly engaged with the tensioning shaft 301, and the tensioning shaft 301 can be locked relative to the mounting base 100 by the locking nut 3021. The rotation limiting member 3022 can be connected to the connecting body 102 of the mounting base 100 by a bolt or the like fastener, and the rotation limiting member 3022 has a rotation limiting groove 3023 engaged with the locking nut 3021, and the two side walls of the rotation limiting groove 3023 are arranged opposite to the two side surfaces of the locking nut 3021, so that the rotation of the locking nut 3021 can be limited by the rotation limiting groove 3023 of the rotation limiting member 3022, and the locking failure between the tensioning shaft 301 and the mounting base 100 can be avoided.

[0065] In some embodiments, as shown in the accompanying drawings, Figure 1 As shown, the locking nut 3021 can include two, and the two locking nuts 3021 can be located on both sides of the connecting body 102 of the mounting base 100. Meanwhile, the rotation limiting member 3022 can include a connecting plate 3024 and rotation limiting plates 3025 located on both sides of the connecting plate 3024, and the two rotation limiting plates 3025 are provided with the rotation limiting groove 3023, so that the two rotation limiting grooves 3023 are engaged with the locking nuts 3021 on both sides of the mounting base 100, thereby limiting the rotation of the two locking nuts 3021.

[0066] As can be seen from the above embodiments, compared with the traditional chain wheel tensioning mechanism, the tensioning mechanism disclosed in the embodiments of the present application occupies less space, meets the lightweight design requirement, reduces the pressure of the photovoltaic cleaning robot on the photovoltaic module, and can effectively prevent the problem of derailment of the traction member 400 such as a belt or a chain after loosening, and can also have a limiting and correcting function and realize a self-compensation tensioning function, thereby reducing the maintenance frequency.

[0067] The embodiments of the present application also disclose a photovoltaic cleaning robot, as shown in the accompanying drawings, Figure 17 As shown, the photovoltaic cleaning robot includes a transmission box and a tensioning mechanism, and the tensioning mechanism is the tensioning mechanism disclosed in the above embodiments, so it has all the technical effects of the above tensioning mechanism, which will not be described herein. The transmission box can include a power unit 500 and a plurality of driven units 600, and the power unit 500 and each driven unit 600 can be connected by a traction member 400 such as a chain, and the tensioning mechanism can be installed in the transmission box and located at the side of the traction member 400, so that the traction member 400 is located in the accommodating groove 201 of the tensioning sliding block 200, so that the tensioning effect of the traction member 400 can be achieved by pushing the tensioning shaft 301.

[0068] The terms "first" and "second" and the like, in the description and in the claims of the present application and in the above figures, are used for distinguishing between similar elements and not necessarily for describing a specific sequential or chronological order. Descriptions using the terms "including", "containing" or "comprising" and variations thereof, are meant not to be limiting. For example, a process, method, object, or apparatus that comprises a list of steps or elements is not necessarily limited to the listed steps or elements, but can include additional steps or elements not expressly listed or inherent to such process, method, object, or apparatus.

[0069] The above description of disclosed embodiments is intended to be illustrative and not restrictive. Many modifications of the embodiments described herein will obvious to those with skill and other embodiments that incorporate the general principles described herein can be used without departing from the spirit and scope of the present application. Thus, the present application is not to be limited to the embodiments described herein but rather can be practiced with modification and alteration within the scope and spirit of the appended claims. Accordingly, the specification and drawings are to be regarded in an illustrative, rather than a restrictive, sense.

Claims

1. A take-up mechanism, characterized in that The utility model relates to a kind of traction device, including: Mounting seat (100), the mounting seat (100) is provided with limiting recess (101) on it; Expansion slider (200), it is set to one side of the mounting seat (100) and is slidably matched with the limiting recess (101), the expansion slider (200) limits the accommodating slot (201) for accommodating traction piece (400), and the two sides of the accommodating slot (201) are formed with limiting stop wall (2011) for limiting the deviation of the traction piece (400); Push mechanism (300), the push mechanism (300) is movably arranged on the mounting seat (100), and the push mechanism (300) is used to drive the expansion slider (200) to slide along the limiting recess (101), so that the expansion slider (200) tightens the traction piece (400).

2. The tensioner of claim 1, wherein The push mechanism (300) includes expansion shaft (301) and locking mechanism (302), the expansion shaft (301) is movably arranged on the mounting seat (100), the expansion slider (200) is provided with connecting hole (202), the expansion shaft (301) is matched with the connecting hole (202), to drive the expansion slider (200) to slide, and the locking mechanism (302) is used to lock the action of the expansion shaft (301).

3. The tensioner of claim 2, wherein The expansion shaft (301) is threadedly connected with the connecting hole (202);Or, Reset elastic member (303) is sleeved on the expansion shaft (301), and the reset elastic member (303) is located between the expansion slider (200) and the mounting seat (100).

4. The tensioner of claim 2, wherein The expansion slider (200) is further provided with thrust piece (203) for stopping the movement of the expansion shaft (301), and the expansion slider (200) is provided with thrust hole (204) matched with the thrust piece (203), and the thrust hole (204) is communicated with the connecting hole (202) perpendicularly.

5. The tensioner of claim 2, wherein The locking mechanism (302) includes limit rotation piece (3022) and locking nut (3021) threadedly matched with the expansion shaft (301), the limit rotation piece (3022) has limit rotation groove (3023) matched with the locking nut (3021), and the limit rotation piece (3022) is connected to the mounting seat (100) by fastener.

6. The tensioner of claim 5, wherein, The locking nut (3021) includes two, and two locking nuts (3021) are located on the two sides of the mounting seat (100) respectively, the limit rotation piece (3022) includes connecting plate (3024) and limit rotation plate (3025) located on the two sides of the connecting plate (3024), two limit rotation plates (3025) are both provided with the limit rotation groove (3023), so that two limit rotation grooves (3023) are matched with the locking nut (3021) on the two sides of the mounting seat (100) respectively.

7. The tensioner of claim 5, wherein Two side walls of the limit rotation groove (3023) are arranged in parallel to two side faces of the locking nut (3021) oppositely arranged.

8. The tensioner of claim 1, wherein The tensioning slider (200) comprises two sliding arms (205) arranged in parallel, and the limiting groove (101) is matched with the sliding arms (205), and the sliding arms (205) can slide along the limiting groove (101).

9. The tensioner of claim 8, wherein, The accommodating groove (201) extends from the end of one of the sliding arms (205) to the end of the other, and a boss (2012) for matching with the traction member (400) is arranged in the accommodating groove (201).

10. A photovoltaic cleaning robot, characterized in that The tensioning mechanism as claimed in any one of claims 1-9 is installed in a transmission case.

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