Photovoltaic module

Abstract

The invention provides a photovoltaic module, and the photovoltaic module comprises a pedestal; the photovoltaic panel is obliquely arranged relative to the horizontal plane; the first supporting rope is movably supported on the base and is connected to the lower part of the photovoltaic panel; the vibration structure is arranged on the base and connected with the first supporting rope, and the vibration structure can drive the first supporting rope to vibrate so as to drive the photovoltaic panel to vibrate. According to the technical scheme, the problem that the snow removal effect is poor in the prior art can be effectively solved.

Description

Technical Field

[0001] The present invention relates to the field of new energy technology, and in particular to a photovoltaic module. Background Art

[0002] Photovoltaic modules are devices composed of multiple photovoltaic cells, used to convert sunlight into electrical energy. Photovoltaic cells are devices that use the photoelectric effect to convert sunlight into electrical energy, while photovoltaic modules are multiple photovoltaic cells connected together in a certain arrangement to form an overall power supply system. Globally, photovoltaic modules are widely used in homes, businesses and industries, bringing people sustainable and environmentally friendly energy solutions.

[0003] In some application scenarios, such as high altitude areas, where there is sufficient snowfall in winter, snow easily accumulates on the photovoltaic panels of photovoltaic modules and is difficult to melt. These will hinder the photovoltaic panels from receiving sunlight, reducing the light absorption efficiency of the photovoltaic modules. In related fields, photovoltaic modules mostly use a swing-type snow removal solution, using inertia to make the snow on the photovoltaic panels fall off. However, this solution will make the photovoltaic panels have a larger movement radius during rotation, which is easy to interfere with other components, and the horizontal area is larger, which has greater limitations. If the rotation frequency is too fast and the amplitude is too large, there is a potential safety risk. If the rotation frequency is too slow and the amplitude is too small, the snow removal effect is not good. Summary of the invention

[0004] The main purpose of the present invention is to provide a photovoltaic module to solve the problem of poor snow removal effect in the related art.

[0005] In order to achieve the above-mentioned purpose, the present invention provides a photovoltaic assembly, including: a base; a photovoltaic panel, which is arranged at an angle relative to a horizontal plane; a first support rope, which is movably arranged on the base and supported below the photovoltaic panel; and a vibration structure, which is arranged on the base and connected to the first support rope, and the vibration structure can drive the first support rope to vibrate to drive the photovoltaic panel to vibrate.

[0006] Furthermore, the photovoltaic assembly also includes a counterweight portion, which is connected to one end of the first support rope to tension the first support rope.

[0007] Furthermore, the vibration structure includes a mounting frame, a vibration motor and a first connecting rod. The mounting frame is connected to the base, the vibration motor is arranged on the mounting frame, the first end of the first connecting rod is hingedly connected to the vibration motor, and the second end of the first connecting rod is connected to the first support rope.

[0008] Furthermore, a first guide groove is provided on the base, the first support rope is passed through the first guide groove and cooperates with the first guide groove for guidance; and / or a second guide groove is provided on the mounting frame, the first connecting rod is passed through the second guide groove and cooperates with the second guide groove for guidance.

[0009] Furthermore, the first connecting rod is set at an angle to the vertical direction, and the vibration structure also includes a second connecting rod and a pressure sensor. The second connecting rod extends along the vertical direction and is passed through the mounting frame. The vibration motor is connected to the bottom end of the second connecting rod. A top block is provided at the top end of the second connecting rod. The pressure sensor is clamped between the top block and the upper surface of the mounting frame.

[0010] Furthermore, the photovoltaic assembly also includes a first support rod, a second support rod and a second support rope, the second support rope is movably supported on the base and connected under the photovoltaic panel, the first support rod is connected between the photovoltaic panel and the first support rope, the second support rod is connected between the photovoltaic panel and the second support rope, and the length of the second support rod is greater than that of the first support rod, so that the photovoltaic panel is inclined relative to the horizontal plane.

[0011] Further, the bottom end of the first support rod is detachably connected to the first support rope, and / or the bottom end of the second support rod is detachably connected to the second support rope.

[0012] Furthermore, the first support rod includes a rod body and a sliding member, a mounting ring is provided at the lower end of the rod body, and the sliding member is slidably disposed in the rod body and can extend into the mounting ring to clamp the first support rope together with the side wall of the mounting ring.

[0013] Furthermore, the rod body has an accommodating cavity, at least part of the sliding member is located in the accommodating cavity, and the first support rod also includes a push member arranged in the accommodating cavity, and the push member pushes downward against the sliding member; and / or, a mounting block is arranged at the lower end of the rod body, and the mounting block has a mounting groove with an opening at the lower end, and the first support rod also includes a screw rod passing through the lower end of the mounting block, the screw rod is detachably connected to the mounting block, and the side wall of the mounting groove and the screw rod are jointly arranged to form a mounting ring.

[0014] Further, the first support rod comprises a first rod body and a second rod body which are nested, and the first rod body can move relative to the second rod body to adjust the length of the first support rod; and / or, a position sensor is arranged on the base, and the position sensor can detect the height of the counterweight part.

[0015] The technical solution of the present invention is applied, the base is used to provide a support foundation for various components of the photovoltaic module, the photovoltaic panel is used to absorb light energy to realize the main function of the photovoltaic module, when encountering heavy snow weather, the photovoltaic panel is arranged obliquely relative to the horizontal plane, so that the photovoltaic panel is less likely to accumulate snow, even if snow accumulates, it makes it easier for the snow to separate from the photovoltaic panel, the first support rope is movably arranged on the base and connected to the bottom of the photovoltaic panel; the vibration structure is arranged on the base and connected to the first support rope, the vibration structure can drive the first support rope to vibrate to drive the photovoltaic panel to vibrate, when snow accumulates on the photovoltaic panel, the vibration structure works, and the vibration generated by the vibration structure is transmitted to the first support rope, the first support rope drives the photovoltaic panel to vibrate, so that the snow on the photovoltaic panel is shaken off, compared with the swing-type snow removal scheme in the related art, the present application can avoid interference between the photovoltaic panel and other structures, thereby reducing safety hazards. Therefore, the technical solution of the present application can effectively solve the problem of poor snow removal effect in the related art. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0017] Figure 1 A schematic diagram of the three-dimensional structure of an embodiment of a photovoltaic assembly according to the present invention is shown;

[0018] Figure 2 Shows Figure 1 A front view schematic diagram of a photovoltaic module;

[0019] Figure 3 Shows Figure 1 A three-dimensional structural schematic diagram of a partial structure of a photovoltaic module;

[0020] Figure 4 Shows Figure 1 A schematic diagram of the three-dimensional structure of another part of the photovoltaic module;

[0021] Figure 5 Shows Figure 4 An enlarged schematic diagram of the photovoltaic module at A;

[0022] Figure 6 Shows Figure 1 A schematic diagram of the three-dimensional structure of a photovoltaic panel of a photovoltaic module;

[0023] Figure 7 Shows Figure 6 An enlarged schematic diagram of point B of the photovoltaic panel.

[0024] The above drawings include the following reference numerals:

[0025] 10. base; 11. first guide groove;

[0026] 20. Photovoltaic panels;

[0027] 30. First support rope;

[0028] 40. Vibration structure; 41. Mounting frame; 411. Second guide groove; 42. Vibration motor; 43. First connecting rod; 44. Connecting sleeve; 45. Second connecting rod; 46. Pressure sensor;

[0029] 50. counterweight part; 51. bearing platform; 52. counterweight block; 501. pulley member;

[0030] 60. first support rod; 61. rod body; 62. sliding member; 63. mounting ring; 64. mounting block; 641. mounting groove; 642. screw rod;

[0031] 70. second support rod;

[0032] 80. Second support rope;

[0033] 90. Switch. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0035] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0036] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps set forth in these embodiments do not limit the scope of the present invention. Meanwhile, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, method and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but in appropriate cases, the technology, method and equipment should be considered as a part of the specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, and therefore, once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0037] like Figure 1 , Figure 2 , Figure 4 as well as Figure 5 As shown, the present application provides a photovoltaic component, and an embodiment of the photovoltaic component of the present application includes: a base 10, a photovoltaic panel 20, a first support rope 30, and a vibration structure 40; the photovoltaic panel 20 is arranged obliquely relative to the horizontal plane; the first support rope 30 is movably arranged on the base 10 and supported under the photovoltaic panel 20; the vibration structure 40 is arranged on the base 10 and connected to the first support rope 30, and the vibration structure 40 can drive the first support rope 30 to vibrate to drive the photovoltaic panel 20 to vibrate.

[0038] By applying the technical solution of this embodiment, the base 10 is used to provide a supporting foundation for various components of the photovoltaic module, and the photovoltaic panel 20 is used to absorb light energy to realize the main function of the photovoltaic module. When encountering heavy snow weather, the photovoltaic panel 20 is arranged at an angle relative to the horizontal plane, so that the photovoltaic panel 20 is less likely to accumulate snow. Even if snow accumulates, it makes it easier for the snow to break away from the photovoltaic panel 20. The first support rope 30 is movably arranged on the base 10 and connected to the bottom of the photovoltaic panel 20; the vibration structure 40 is arranged on the base 10 and connected to the first support rope 30. The vibration structure 40 can drive the first support rope 30 to vibrate to drive the photovoltaic panel 20 to vibrate. When snow accumulates on the photovoltaic panel 20, the vibration structure 40 works, and the vibration generated by the vibration structure 40 is transmitted to the first support rope 30. The first support rope 30 drives the photovoltaic panel 20 to vibrate, so that the snow on the photovoltaic panel 20 is shaken off. Compared with the swing-type snow removal scheme in the related art, this embodiment can avoid interference between the photovoltaic panel 20 and other structures, thereby reducing safety hazards. Therefore, the technical solution of this embodiment can effectively solve the problem of poor snow removal effect in the related art.

[0039] like Figures 1 to 3As shown, the photovoltaic assembly further includes a counterweight 50, which is connected to one end of the first support rope 30 to tension the first support rope 30. Specifically, the counterweight 50 is arranged so that the first support rope 30 can be tensioned to ensure that the first support rope 30 can achieve the snow removal function under tension. The tensioned first support rope 30 can ensure that the vibration generated by the vibration structure 40 can drive the first support rope 30 to vibrate, thereby driving the photovoltaic panel 20 to vibrate, so as to avoid the situation where the first support rope 30 cannot transmit vibration and cannot drive the photovoltaic panel 20 to vibrate. More specifically, the counterweight 50 includes a bearing platform 51 and a counterweight 52, and the photovoltaic assembly further includes a pulley 501, the first support rope 30 is arranged on the pulley 501, the bearing platform 51 is connected to the free end of the first support rope 30, the counterweight 52 can be placed on the bearing platform 51, and the staff can adjust the tension of the first support rope 30 by adjusting the weight of the counterweight 52.

[0040] It should be noted that in this embodiment, there are two photovoltaic panels 20 , which are arranged at an interval, and the vibration structure 40 is arranged between the two photovoltaic panels 20 . Counterweights 50 are provided at both ends of the first support rope 30 to tension the first support rope 30 .

[0041] like Figure 4 as well as Figure 5 As shown, the vibration structure 40 includes a mounting frame 41, a vibration motor 42 and a first connecting rod 43. The mounting frame 41 is connected to the base 10, the vibration motor 42 is arranged on the mounting frame 41, the first end of the first connecting rod 43 is hingedly connected to the vibration motor 42, and the second end of the first connecting rod 43 is connected to the first support rope 30. Specifically, the vibration structure 40 also includes a connecting sleeve 44, the connecting sleeve 44 is sleeved on the first support rope 30, the vibration generated by the vibration motor 42 drives the first connecting rod 43 to vibrate, thereby driving the first support rope 30 to vibrate; the first end of the first connecting rod 43 is hingedly connected to the vibration motor 42, and the second end of the first connecting rod 43 is hingedly connected to the connecting sleeve 44, so as to avoid the first connecting rod 43 from getting stuck during vibration.

[0042] like Figure 5 As shown, a first guide groove 11 is provided on the base 10, and the first support rope 30 is passed through the first guide groove 11 and cooperates with the first guide groove 11. The first guide groove 11 cooperates with the first support rope 30 to guide the vibration of the first support rope 30, so that the first support rope 30 is in a state of up and down vibration.

[0043] like Figure 5As shown, the mounting frame 41 is provided with a second guide groove 411, and the first connecting rod 43 is passed through the second guide groove 411 and cooperates with the second guide groove 411. The second guide groove 411 cooperates with the first connecting rod 43 to guide the movement of the first connecting rod 43, so that the first connecting rod 43 is in an up and down swinging state.

[0044] like Figure 5 As shown, the first connecting rod 43 is arranged at an angle with the vertical direction, and the vibration structure 40 further includes a second connecting rod 45 and a pressure sensor 46. The second connecting rod 45 extends in the vertical direction and is penetrated on the mounting frame 41. The vibration motor 42 is connected to the bottom end of the second connecting rod 45. The top end of the second connecting rod 45 is provided with a top block, and the pressure sensor 46 is sandwiched between the top block and the upper surface of the mounting frame 41. Specifically, the pressure sensor 46 is used to reflect the tension of the first support rope 30. The tighter the first support rope 30 is, the greater the pulling force of the first support rope 30 on the vibration structure 40, thereby the greater the pulling force on the second connecting rod 45, so that the pressing force of the top block on the pressure sensor 46 is greater, thereby realizing the function of the pressure sensor 46 reflecting the tension of the first support rope 30.

[0045] like Figures 1 to 4 as well as Figures 5 to 7 As shown, the photovoltaic assembly further includes a first support rod 60, a second support rod 70 and a second support rope 80, the second support rope 80 is movably supported on the base 10 and connected below the photovoltaic panel 20, the first support rod 60 is connected between the photovoltaic panel 20 and the first support rope 30, the second support rod 70 is connected between the photovoltaic panel 20 and the second support rope 80, and the length of the second support rod 70 is greater than the length of the first support rod 60, so that the photovoltaic panel 20 is tilted relative to the horizontal plane. Specifically, the structure of the second support rope 80 is similar to that of the first support rope 30, the second support rope 80 is at the same height as the first support rope 30, and the photovoltaic assembly further includes another vibration structure to drive the second support rope 80 to vibrate.

[0046] like Figure 6 as well as Figure 7 As shown, the bottom end of the first support rod 60 is detachably connected to the first support rope 30, and the bottom end of the second support rod 70 is detachably connected to the second support rope 80. Such an arrangement facilitates the staff to load, unload and maintain the photovoltaic panel 20.

[0047] like Figure 6 as well as Figure 7As shown, the first support rod 60 includes a rod body 61 and a sliding member 62. A mounting ring 63 is provided at the lower end of the rod body 61. The sliding member 62 is slidably disposed in the rod body 61 and can extend into the mounting ring 63 to clamp the first support rope 30 together with the side wall of the mounting ring 63. Specifically, the sliding member 62 cooperates with the side wall of the mounting ring 63 to achieve stable clamping of the first support rope 30, thereby achieving stable connection between the photovoltaic panel 20 and the first support rope 30.

[0048] like Figure 6 as well as Figure 7 As shown, the rod body 61 has a receiving cavity, at least part of the sliding member 62 is located in the receiving cavity, and the first support rod 60 also includes a resisting member disposed in the receiving cavity, and the resisting member resists downwardly the sliding member 62. Specifically, the resisting member is a compression spring, one end of which is connected to the inner surface of the receiving cavity, and the other end of which is connected to the sliding member 62. The sliding member 62 is a plate-shaped structure, and the sliding member 62 can also be other structures. The compression spring applies a downward force to the sliding member 62 so that the sliding member 62 can resist the first support rope 30.

[0049] like Figure 6 as well as Figure 7 As shown, a mounting block 64 is provided at the lower end of the rod body 61, and the mounting block 64 has a mounting groove 641 with an opening at the lower end. The first support rod 60 also includes a screw rod 642 passing through the lower end of the mounting block 64, and the screw rod 642 is detachably connected to the mounting block 64. The side wall of the mounting groove 641 and the screw rod 642 are jointly surrounded to form a mounting ring 63. Specifically, the setting of the screw rod 642 can facilitate the staff to load and unload the first support rope 30 and the first support rod 60. It should be noted that the second support rod 70 has a similar structure to the first support rod 60, which will not be repeated herein.

[0050] In addition, in this embodiment, the first support rod 60 includes a first rod body and a second rod body that are nested, and the first rod body can move relative to the second rod body to adjust the length of the first support rod 60. This arrangement allows the staff to adjust the length of the first support rod 60 as needed, thereby adjusting the inclination angle of the photovoltaic panel 20.

[0051] In addition, in the present embodiment, a position sensor is provided on the base 10, and the position sensor can detect the height of the counterweight 50. Specifically, the position sensor can sense the position change of the counterweight 52. When the weight of the snow on the photovoltaic panel 20 reaches a certain level, the gravity of the snow will drive the photovoltaic panel 20 to move downward, thereby driving the counterweight 52 to move upward, so that the change in the amount of snow is reflected by the position change of the counterweight 52. In addition, "detecting the height of the counterweight 50" means that when there is no snow or less snow, the position of the counterweight 50 in the height direction coincides with the position sensor, and the position sensor can detect the counterweight 50; when there is too much snow, the counterweight 50 moves upward, and the position sensor cannot detect the counterweight 50, that is, based on the detection result that the position sensor cannot detect the counterweight 50, it is judged that there is too much snow.

[0052] In addition, in this embodiment, the photovoltaic assembly further includes a switch 90. The switch 90 is electrically connected to the vibration motor 42 and is used to control the working state of the vibration motor 42.

[0053] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the devices or elements referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention. The directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0054] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0055] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.

[0056] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A photovoltaic module, characterized in that: include: Base (10); A photovoltaic panel (20) is arranged obliquely relative to a horizontal plane; A first supporting rope (30) is movably arranged on the base (10) and supported below the photovoltaic panel (20); A vibration structure (40) is arranged on the base (10) and connected to the first support rope (30); the vibration structure (40) can drive the first support rope (30) to vibrate so as to drive the photovoltaic panel (20) to vibrate.

2. The photovoltaic module according to claim 1, characterized in that: The photovoltaic assembly further comprises a counterweight portion (50), wherein the counterweight portion (50) is connected to one end of the first supporting rope (30) to tension the first supporting rope (30).

3. The photovoltaic module according to claim 2, characterized in that: The vibration structure (40) comprises a mounting frame (41), a vibration motor (42) and a first connecting rod (43); the mounting frame (41) is connected to the base (10); the vibration motor (42) is arranged on the mounting frame (41); the first end of the first connecting rod (43) is hingedly connected to the vibration motor (42); and the second end of the first connecting rod (43) is connected to the first supporting rope (30).

4. The photovoltaic module according to claim 3, characterized in that: The base (10) is provided with a first guide groove (11), the first support rope (30) is passed through the first guide groove (11) and is guided and matched with the first guide groove (11); and / or, The installation frame (41) is provided with a second guide groove (411), and the first connecting rod (43) is inserted into the second guide groove (411) and is guided and matched with the second guide groove (411).

5. The photovoltaic module according to claim 3, characterized in that: The first connecting rod (43) is arranged at an angle with the vertical direction. The vibration structure (40) also includes a second connecting rod (45) and a pressure sensor (46). The second connecting rod (45) extends along the vertical direction and is passed through the installation frame (41). The vibration motor (42) is connected to the bottom end of the second connecting rod (45). A support block is arranged at the top end of the second connecting rod (45). The pressure sensor (46) is clamped between the support block and the upper surface of the installation frame (41).

6. The photovoltaic module according to any one of claims 2 to 5, characterized in that: The photovoltaic assembly further comprises a first support rod (60), a second support rod (70) and a second support rope (80), wherein the second support rope (80) is movably arranged on the base (10) and supported below the photovoltaic panel (20), the first support rod (60) is connected between the photovoltaic panel (20) and the first support rope (30), and the second The support rod (70) is connected between the photovoltaic panel (20) and the second support rope (80). The length of the support rod (70) is greater than the length of the first support rod (60), so that the photovoltaic panel (20) is arranged to be inclined relative to the horizontal plane.

7. The photovoltaic module according to claim 6, characterized in that: The bottom end of the first support rod (60) is detachably connected to the first support rope (30), and / or the bottom end of the second support rod (70) is detachably connected to the second support rope (80).

8. The photovoltaic module according to claim 6, characterized in that: The first support rod (60) includes a rod body (61) and a sliding member (62), a mounting ring (63) is provided at the lower end of the rod body (61), and the sliding member (62) is slidably disposed in the rod body (61) and can extend into the mounting ring (63) to clamp the first support rope (30) together with the side wall of the mounting ring (63).

9. The photovoltaic module according to claim 8, characterized in that: The rod body (61) has a receiving cavity, at least part of the sliding member (62) is located in the receiving cavity, and the first support rod (60) also includes a resisting member arranged in the receiving cavity, the resisting member resists the sliding member (62) downward; and / or, A mounting block (64) is provided at the lower end of the rod body (61), and the mounting block (64) has a mounting groove (641) with an opening at the lower end. The first support rod (60) also includes a screw rod (642) passing through the lower end of the mounting block (64), and the screw rod (642) is detachably connected to the mounting block (64). The side wall of the mounting groove (641) and the screw rod (642) are jointly arranged to form the mounting ring (63).

10. The photovoltaic module according to claim 6, characterized in that: The first support rod (60) comprises a first rod body and a second rod body which are nested, and the first rod body can move relative to the second rod body to adjust the length of the first support rod (60); and / or, A position sensor is provided on the base (10), and the position sensor is capable of detecting the height of the counterweight part (50).

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