Intelligent photovoltaic support wind load self-adaptive adjusting mechanism based on multi-mode perception
Through the multi-modal perception intelligent photovoltaic bracket wind-load adaptive adjustment mechanism, the multi-angle adjustment and stability of the photovoltaic panel are achieved, solving the looseness and damage problems of existing photovoltaic brackets under the action of wind, and improving the power generation efficiency and service life.
Patent Information
- Application Number
- CN202510484318.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-17
- Publication Date
- 2025-07-18
AI Technical Summary
The existing photovoltaic brackets are prone to loosening or damage under the action of wind, and the mechanical transmission structure increases the installation difficulty and maintenance frequency, so it is impossible to adjust the angle effectively and improve power generation efficiency.
The multi-modal perception intelligent photovoltaic bracket wind-load adaptive adjustment mechanism includes a horizontal rotation driving mechanism, an inclined angle driving mechanism, a wind speed and wind direction sensor, an angle sensor and a pressure sensor. Through hydraulic drive and sensor monitoring, the multi-angle adjustment and stability of the photovoltaic panel are achieved.
It improves the solar light reception efficiency of photovoltaic panels, extends service life, reduces maintenance frequency, and enhances overall stability and wind resistance.
Smart Images

Figure CN120342305A_ABST
Abstract
Description
Technical Field
[0001] The invention belongs to the technical field of photovoltaic brackets, and specifically relates to an intelligent photovoltaic bracket wind load adaptive adjustment mechanism based on multi-modal perception. Background Art
[0002] Due to the characteristics of being clean, safe, convenient, and efficient, solar power generation products have become an emerging industry that has attracted widespread attention and key development in various countries around the world. In order to enable photovoltaic panels to fully receive sunlight, photovoltaic tracking brackets are currently widely used. Through the photovoltaic tracking brackets, sun-tracking is realized, thereby improving the power generation efficiency. However, in order to achieve the angle adjustment function, the existing photovoltaic tracking brackets widely adopt mechanical transmission structures such as gears, worm wheels, and worm shafts. The mechanical transmission structure not only increases the installation difficulty but also requires frequent maintenance during the later use process. In addition, the existing photovoltaic tracking brackets cannot effectively adjust the angle according to the wind direction. When strong winds occur, the wind force will act on the photovoltaic panels, easily causing the photovoltaic panels to be loose or damaged during installation. Therefore, this application proposes an intelligent photovoltaic bracket wind load adaptive adjustment mechanism based on multi-modal perception. Summary of the Invention
[0003] In view of the above situation, in order to overcome the defects of the prior art, the invention provides an intelligent photovoltaic bracket wind load adaptive adjustment mechanism based on multi-modal perception, effectively solving the problem that the existing photovoltaic brackets are not convenient for adaptive adjustment.
[0004] To achieve the above object, the invention provides the following technical solution: An intelligent photovoltaic bracket wind load adaptive adjustment mechanism based on multi-modal perception, including a support base. A horizontal rotation drive mechanism, an intelligent controller, and a support vertical rod are fixedly arranged at the top of the support base. A wind speed and wind direction sensor is arranged at the top of the support vertical rod. An angle sensor one is fixedly arranged at the middle position of the bottom end of the horizontal rotation drive mechanism. A rotation support platform is fixedly arranged at the top of the horizontal rotation drive mechanism. An inclination angle drive mechanism is fixedly arranged at the top of the rotation support platform. An angle sensor two is fixedly arranged at the middle position of one side of the inclination angle drive mechanism. A V-shaped bracket is fixedly arranged at the other side of the inclination angle drive mechanism. A photovoltaic panel support frame is fixedly arranged at the top of the V-shaped bracket. A pressure sensor one is arranged between one end of the bottom of the photovoltaic panel support frame and the V-shaped bracket. A pressure sensor two is arranged between the other end of the bottom of the photovoltaic panel support frame and the V-shaped bracket.
[0005] Both the horizontal rotation drive mechanism and the inclination angle drive mechanism are composed of a rotation drive assembly, a two-way pumping assembly, a first tensioning assembly, and a second tensioning assembly. The two-way pumping assembly, the first tensioning assembly, and the second tensioning assembly are all fixedly connected to the side of the rotation drive assembly. The first tensioning assembly and the second tensioning assembly are symmetrically arranged on both sides of the two-way pumping assembly. One ends of the first tensioning assembly and the second tensioning assembly both extend into the interior of the rotation drive assembly.
[0006] The rotation drive assembly is composed of an outer housing, an inner positioning block, a central rotating seat, and a hydraulic drive inner liner. The inner positioning block is fixedly connected to one side inside the outer housing. The central rotating seat is rotatably connected to the central position inside the outer housing. One end of the central rotating seat extends to the outside of the outer housing. The hydraulic drive inner liner is located inside the outer housing and is slidably connected to the inner surface of the outer housing. The hydraulic drive inner liner is sleeved on the central rotating seat and is fixedly connected to the central rotating seat. A first hydraulic chamber and a second hydraulic chamber are formed between the hydraulic drive inner liner and the outer housing.
[0007] Preferably, a wedge-shaped groove is formed between one end of the inner positioning block and the inner side wall of the outer housing.
[0008] Preferably, a first stepped groove and a second stepped groove matching the inner positioning block are provided on one side of the arc-shaped outer surface of the hydraulic drive inner liner.
[0009] Preferably, a third stepped groove and a fourth stepped groove matching the inner positioning block are provided on the other side of the arc-shaped outer surface of the hydraulic drive inner liner.
[0010] Preferably, the central rotating seat is composed of a rotating main shaft and a micro shaft. The micro shaft is fixedly connected to the middle position of one end of the rotating main shaft. The rotating main shaft is rotatably connected to the outer housing through a first shaft seal. One end of the rotating main shaft away from the micro shaft extends to the outside of the outer housing. The micro shaft is rotatably connected to the outer housing through a second shaft seal.
[0011] Preferably, the micro shafts on the horizontal rotation drive mechanism and the tilt angle drive mechanism are respectively connected to a first angle sensor and a second angle sensor.
[0012] Preferably, the two-way pumping assembly is composed of a two-way booster pump, a first pumping pipe, a second pumping pipe, a first solenoid valve, and a second solenoid valve. The first pumping pipe and the second pumping pipe are both connected between the two-way booster pump and the outer housing. The first solenoid valve and the second solenoid valve are respectively connected to the first pumping pipe and the second pumping pipe.
[0013] Preferably, through holes one and two for connecting the first pumping pipe and the second pumping pipe are provided on the outer housing. Through hole one and through hole two are respectively communicated with the first hydraulic chamber and the second hydraulic chamber.
[0014] Preferably, both the first tensioning assembly and the second tensioning assembly are composed of a fixed seat, an electric push rod, and a push head. The electric push rod is fixedly connected to the outer housing through the fixed seat and extends into the outer housing. The push head is fixedly connected to one end of the electric push rod.
[0015] Preferably, mounting grooves one and two matching the first tensioning assembly and the second tensioning assembly are provided on the outer housing.
[0016] Compared with the prior art, the beneficial effects of the present invention are as follows:
[0017] (1) During operation, by providing a horizontal rotation drive mechanism and an inclination angle drive mechanism composed of a rotation drive assembly, a two-way pumping assembly, a first tensioning assembly, and a second tensioning assembly, it is possible to drive the V-shaped bracket and the photovoltaic panel support frame to perform rotation adjustment and inclination angle adjustment, and further drive the photovoltaic panel to perform multi-angle adjustment, enabling the photovoltaic panel to fully receive sunlight, thereby improving the power generation efficiency;
[0018] (2) By providing a rotation drive assembly composed of an outer housing, an inner positioning block, a central rotation seat, and a hydraulic drive bushing, and a two-way pumping assembly composed of a two-way booster pump, a first pumping pipe, a second pumping pipe, a solenoid valve 1, and a solenoid valve 2, it is possible to achieve two-way drive adjustment using hydraulic oil, improve the overall stability, eliminate the need for frequent maintenance, and effectively extend the service life;
[0019] (3) By providing a first tensioning assembly and a second tensioning assembly composed of a fixed seat, an electric push rod, and a push head, it is possible to squeeze the hydraulic oil inside the first hydraulic chamber and the second hydraulic chamber, filling the gaps inside the first hydraulic chamber and the second hydraulic chamber, thereby preventing the central rotation seat and the hydraulic drive bushing from rotating automatically, and further improving the overall stability;
[0020] (4) By providing an anemometer and a wind vane sensor, it is possible to directly monitor the wind force and wind direction. By providing an angle sensor 1 and an angle sensor 2, it is possible to monitor the angles of the horizontal rotation drive mechanism and the inclination angle drive mechanism. By providing a pressure sensor 1 and a pressure sensor 2, it is possible to achieve pressure monitoring, and further achieve auxiliary monitoring of the wind direction and wind force. BRIEF DESCRIPTION OF THE DRAWINGS
[0021] The drawings are used to provide a further understanding of the present invention, and constitute a part of the specification. They are used in conjunction with the embodiments of the present invention to explain the present invention, and do not constitute a limitation to the present invention.
[0022] In the drawings:
[0023] Figure 1 is a schematic structural diagram of an intelligent photovoltaic bracket wind load adaptive adjustment mechanism based on multi-modal perception according to the present invention;
[0024] Figure 2 is a schematic connection structure diagram of an inclination angle drive mechanism, a V-shaped bracket, and a photovoltaic panel support frame according to the present invention;
[0025] Figure 3 is a top view of a horizontal rotation drive mechanism according to the present invention;
[0026] Figure 4One of the top view cross-sectional views of the horizontal rotation drive mechanism of the present invention;
[0027] Figure 5 Two of the top view cross-sectional views of the horizontal rotation drive mechanism of the present invention;
[0028] Figure 6 Three of the top view cross-sectional views of the horizontal rotation drive mechanism of the present invention;
[0029] Figure 7 Schematic structural diagram of the outer housing of the present invention;
[0030] Figure 8 Schematic structural diagram of the connection structure between the hydraulic drive inner lining sleeve and the central rotating seat of the present invention;
[0031] Figure 9 Schematic structural diagram of the two-way pumping assembly of the present invention;
[0032] Figure 10 Schematic structural diagram of the central rotating seat of the present invention;
[0033] Figure 11 Schematic structural diagram of the first tensioning assembly of the present invention;
[0034] In the figure: 1, support base; 2, horizontal rotation drive mechanism; 3, intelligent controller; 4, support vertical rod; 5, wind speed and direction sensor; 6, angle sensor one; 7, rotating support platform; 8, tilt angle drive mechanism; 9, angle sensor two; 10, V-shaped bracket; 11, photovoltaic panel support frame; 12, pressure sensor one; 13, pressure sensor two; 14, rotation drive assembly; 15, two-way pumping assembly; 16, first tensioning assembly; 17, second tensioning assembly; 18, outer housing; 19, inner positioning block; 20, central rotating seat; 21, hydraulic drive inner lining sleeve; 22, first hydraulic chamber; 23, second hydraulic chamber; 24, wedge-shaped groove; 25, step groove one; 26, step groove two; 27, step groove three; 28, step groove four; 29, rotating main shaft; 30, micro shaft; 31, shaft seal one; 32, shaft seal two; 33, two-way booster pump; 34, first pumping pipe; 35, second pumping pipe; 36, solenoid valve one; 37, solenoid valve two; 38, through hole one; 39, through hole two; 40, fixed seat; 41, electric push rod; 42, push head; 43, installation groove one; 44, installation groove two. Detailed implementation manners
[0035] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments; based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.
[0036] Embodiment 1 is given by Figures 1 to 11 Figures 1 to 11
[0037]
[0037]
[0038]
[0038]
[0039]
[0039]
[0040] The rotation drive assembly 14 is composed of a housing 18, an inner positioning block 19, a central rotating seat 20, and a hydraulic drive bushing 21. The inner positioning block 19 is fixedly connected to one side inside the housing 18. The central rotating seat 20 is rotatably connected to the central position inside the housing 18. One end of the central rotating seat 20 extends to the outside of the housing 18. The hydraulic drive bushing 21 is located inside the housing 18 and is slidably connected to the inner surface of the housing 18. The hydraulic drive bushing 21 is sleeved on the central rotating seat 20 and is fixedly connected to the central rotating seat 20. A first hydraulic chamber 22 and a second hydraulic chamber 23 are formed between the hydraulic drive bushing 21 and the housing 18;
[0041] The first hydraulic chamber 22 and the second hydraulic chamber 23 are filled with hydraulic oil. The two-way pumping assembly 15 adjusts the amount of oil inside the first hydraulic chamber 22 and the second hydraulic chamber 23. The hydraulic oil drives the hydraulic drive bushing 21 to rotate, and the hydraulic drive bushing 21 drives the central rotating seat 20 to rotate. The inner positioning block 19 limits the hydraulic oil, so that the hydraulic oil generates a driving force, and at the same time can limit the hydraulic drive bushing 21;
[0042] A wedge-shaped groove 24 is formed between one end of the inner positioning block 19 and the inner side wall of the housing 18, which can form an original gap, so that the hydraulic oil can smoothly enter the inside of the first hydraulic chamber 22;
[0043] On one side of the arc-shaped outer surface of the hydraulic drive bushing 21, there are a first stepped groove 25 and a second stepped groove 26 that match the inner positioning block 19. The first stepped groove 25 can contact the inner positioning block 19 to form a rotation stroke limit. The second stepped groove 26 can accommodate the first tensioning assembly 16, and at the same time assist in forming the original gap, facilitating the hydraulic oil to enter the inside of the first hydraulic chamber 22;
[0044] On the other side of the arc-shaped outer surface of the hydraulic drive bushing 21, there are a third stepped groove 27 and a fourth stepped groove 28 that match the inner positioning block 19. The third stepped groove 27 can contact the inner positioning block 19 to form a rotation stroke limit. The fourth stepped groove 28 can accommodate the second tensioning assembly 17, and at the same time assist in forming the original gap, facilitating the hydraulic oil to enter the inside of the second hydraulic chamber 23;
[0045] The central rotating seat 20 is composed of a rotating main shaft 29 and a micro shaft 30. The micro shaft 30 is fixedly connected to the middle position of one end of the rotating main shaft 29. The rotating main shaft 29 is rotatably connected to the housing 18 through a first shaft seal 31. One end of the rotating main shaft 29 away from the micro shaft 30 extends to the outside of the housing 18. The micro shaft 30 is rotatably connected to the housing 18 through a second shaft seal 32. The first shaft seal 31 and the second shaft seal 32 can improve the mobility and sealing performance of the connection between the rotating main shaft 29 and the micro shaft 30;
[0046] The microshafts 30 on the horizontal rotation drive mechanism 2 and the tilt angle drive mechanism 8 are respectively connected to the angle sensor one 6 and the angle sensor two 9, enabling the angle sensor one 6 and the angle sensor two 9 to monitor the rotation angle in real time;
[0047] The two-way pumping assembly 15 is composed of a two-way booster pump 33, a first pumping pipe 34, a second pumping pipe 35, a solenoid valve one 36 and a solenoid valve two 37. The first pumping pipe 34 and the second pumping pipe 35 are both connected between the two-way booster pump 33 and the outer housing 18, and the solenoid valve one 36 and the solenoid valve two 37 are respectively connected to the first pumping pipe 34 and the second pumping pipe 35;
[0048] When the two-way pumping assembly 15 works, the two-way booster pump 33 starts. The two-way booster pump 33 can control the pumping direction, and realizes the output and input of the hydraulic oil through the first pumping pipe 34 and the second pumping pipe 35, so that the hydraulic oil reciprocally flows inside the first hydraulic chamber 22 and the second hydraulic chamber 23, and realizes the angle adjustment through the drive of the hydraulic oil. After each adjustment is completed, the solenoid valve one 36 and the solenoid valve two 37 block the first pumping pipe 34 and the second pumping pipe 35;
[0049] The outer housing 18 is provided with a through hole one 38 and a through hole two 39 connected to the first pumping pipe 34 and the second pumping pipe 35. The through hole one 38 and the through hole two 39 are respectively communicated with the first hydraulic chamber 22 and the second hydraulic chamber 23, and can install the first pumping pipe 34 and the second pumping pipe 35;
[0050] Both the first tensioning assembly 16 and the second tensioning assembly 17 are composed of a fixed seat 40, an electric push rod 41 and a push head 42. The electric push rod 41 is fixedly connected to the outer housing 18 through the fixed seat 40 and extends into the interior of the outer housing 18, and the push head 42 is fixedly connected to one end of the electric push rod 41;
[0051] During the pumping process, there may be a small gap inside the first hydraulic chamber 22 and the second hydraulic chamber 23. The generation of the gap will affect the stability. At this time, the electric push rod 41 can drive the push head 42 to move, so that the push head 42 and the rod body of the electric push rod 41 enter into the first hydraulic chamber 22 and the second hydraulic chamber 23, thereby filling the gap and improving the overall stability;
[0052] The outer housing 18 is provided with an installation groove one 43 and an installation groove two 44 matching the first tensioning assembly 16 and the second tensioning assembly 17, and can respectively install the first tensioning assembly 16 and the second tensioning assembly 17.
[0053] During work, by setting up a horizontal rotation drive mechanism and an inclination angle drive mechanism composed of a rotation drive component, a two-way pumping component, a first tensioning component, and a second tensioning component, it is possible to drive the V-shaped bracket and the photovoltaic panel support frame to perform rotation adjustment and inclination angle adjustment. Furthermore, it can drive the photovoltaic panel to perform multi-angle adjustment, enabling the photovoltaic panel to fully receive sunlight, thereby improving the power generation efficiency. By setting up a rotation drive component composed of an outer housing, an inner positioning block, a central rotation seat, and a hydraulic drive bushing, and a two-way pumping component composed of a two-way booster pump, a first pumping pipe, a second pumping pipe, solenoid valve one, and solenoid valve two, it is possible to achieve two-way drive adjustment using hydraulic oil, improve the overall stability, and eliminate the need for frequent maintenance, effectively extending the service life. By setting up a first tensioning component and a second tensioning component composed of a fixed seat, an electric push rod, and a push head, it is possible to extrude the hydraulic oil inside the first hydraulic chamber and the second hydraulic chamber, filling the gaps inside the first hydraulic chamber and the second hydraulic chamber, thereby preventing the central rotation seat and the hydraulic drive bushing from rotating automatically, and further improving the overall stability. By setting up a wind speed and wind direction sensor, it is possible to directly monitor the wind force and wind direction. By setting up angle sensor one and angle sensor two, it is possible to monitor the angles of the horizontal rotation drive mechanism and the inclination angle drive mechanism. By setting up pressure sensor one and pressure sensor two, it is possible to achieve pressure monitoring, and thus achieve auxiliary monitoring of the wind direction and wind force.
Claims
1. An intelligent photovoltaic support wind load adaptive adjustment mechanism based on multimodal perception, including a support base (1), characterized in that: At the top of the support base (1), a horizontal rotation drive mechanism (2), an intelligent controller (3) and a support vertical rod (4) are fixedly arranged. At the top of the support vertical rod (4), a wind speed and wind direction sensor (5) is arranged. At the middle position of the bottom end of the horizontal rotation drive mechanism (2), an angle sensor I (6) is fixedly arranged. At the top of the horizontal rotation drive mechanism (2), a rotation support platform (7) is fixedly arranged. At the top of the rotation support platform (7), an inclination angle drive mechanism (8) is fixedly arranged. At the middle position of one side of the inclination angle drive mechanism (8), an angle sensor II (9) is fixedly arranged. On the other side of the inclination angle drive mechanism (8), a V-shaped bracket (10) is fixedly arranged. At the top of the V-shaped bracket (10), a photovoltaic panel support frame (11) is fixedly arranged. Between one end of the bottom of the photovoltaic panel support frame (11) and the V-shaped bracket (10), a pressure sensor I (12) is arranged. Between the other end of the bottom of the photovoltaic panel support frame (11) and the V-shaped bracket (10), a pressure sensor II (13) is arranged. Both the horizontal rotation drive mechanism (2) and the inclination angle drive mechanism (8) are composed of a rotation drive component (14), a two-way pumping component (15), a first tensioning component (16) and a second tensioning component (17). The two-way pumping component (15), the first tensioning component (16) and the second tensioning component (17) are all fixedly connected to the side of the rotation drive component (14). The first tensioning component (16) and the second tensioning component (17) are symmetrically arranged on both sides of the two-way pumping component (15). One ends of the first tensioning component (16) and the second tensioning component (17) both extend into the interior of the rotation drive component (14). The rotation drive component (14) is composed of an outer housing (18), an inner positioning block (19), a central rotation seat (20) and a hydraulic drive inner sleeve (21). The inner positioning block (19) is fixedly connected to one side inside the outer housing (18). The central rotation seat (20) is rotatably connected to the central position inside the outer housing (18). One end of the central rotation seat (20) extends to the outside of the outer housing (18). The hydraulic drive inner sleeve (21) is located inside the outer housing (18) and is slidably connected to the inner surface of the outer housing (18). The hydraulic drive inner sleeve (21) is sleeved on the central rotation seat (20) and is fixedly connected to the central rotation seat (20). A first hydraulic chamber (22) and a second hydraulic chamber (23) are formed between the hydraulic drive inner sleeve (21) and the outer housing (18).
2. The intelligent photovoltaic support wind load adaptive adjustment mechanism based on multi-modal perception according to claim 1, characterized in that: A wedge-shaped groove (24) is formed between one end of the inner positioning block (19) and the inner side wall of the outer housing (18).
3. The intelligent photovoltaic support wind load adaptive adjustment mechanism based on multi-modal perception according to claim 1, characterized in that: On one side of the arc-shaped outer surface of the hydraulic drive inner sleeve (21), a first step groove (25) and a second step groove (26) matching the inner positioning block (19) are arranged.
4. The intelligent photovoltaic bracket wind load adaptive adjustment mechanism based on multi-modal perception according to claim 1, characterized in that: On the other side of the arc-shaped outer surface of the hydraulic drive inner sleeve (21), a third step groove (27) and a fourth step groove (28) matching the inner positioning block (19) are arranged.
5. The intelligent photovoltaic bracket wind load adaptive adjustment mechanism based on multi-modal perception according to claim 1, characterized in that: The central rotating seat (20) is composed of a rotating main shaft (29) and a micro shaft (30). The micro shaft (30) is fixedly connected to the middle position of one end of the rotating main shaft (29). The rotating main shaft (29) is rotatably connected to the outer housing (18) through a first shaft seal (31). One end of the rotating main shaft (29) away from the micro shaft (30) extends to the outside of the outer housing (18). The micro shaft (30) is rotatably connected to the outer housing (18) through a second shaft seal (32).
6. The intelligent photovoltaic bracket wind load adaptive adjustment mechanism based on multimodal perception according to claim 5, characterized in that: The micro shafts (30) on the horizontal rotation driving mechanism (2) and the tilt angle driving mechanism (8) are respectively connected to a first angle sensor (6) and a second angle sensor (9).
7. The intelligent photovoltaic support wind load adaptive adjustment mechanism based on multi-modal perception according to claim 1, characterized in that: The two-way pumping assembly (15) is composed of a two-way booster pump (33), a first pumping pipe (34), a second pumping pipe (35), a first solenoid valve (36) and a second solenoid valve (37). The first pumping pipe (34) and the second pumping pipe (35) are both connected between the two-way booster pump (33) and the outer housing (18). The first solenoid valve (36) and the second solenoid valve (37) are respectively connected to the first pumping pipe (34) and the second pumping pipe (35).
8. The intelligent photovoltaic bracket wind load adaptive adjustment mechanism based on multi-modal perception according to claim 7, characterized in that: Through holes one (38) and two (39) connected to the first pumping pipe (34) and the second pumping pipe (35) are formed in the outer housing (18). The through holes one (38) and two (39) are respectively communicated with a first hydraulic chamber (22) and a second hydraulic chamber (23).
9. The intelligent photovoltaic support wind load adaptive adjustment mechanism based on multi-modal perception according to claim 1, characterized in that: Both the first tensioning assembly (16) and the second tensioning assembly (17) are composed of a fixed seat (40), an electric push rod (41) and a push head (42). The electric push rod (41) is fixedly connected to the outer housing (18) through the fixed seat (40) and extends into the inner part of the outer housing (18). The push head (42) is fixedly connected to one end of the electric push rod (41).
10. The intelligent photovoltaic support wind load adaptive adjustment mechanism based on multi-modal perception according to claim 1, wherein: Mounting grooves one (43) and two (44) matching the first tensioning assembly (16) and the second tensioning assembly (17) are formed in the outer housing (18).