Hydraulic system applied to photovoltaic equipment

Abstract

The invention particularly relates to a hydraulic system applied to photovoltaic equipment, and belongs to the technical field of hydraulic equipment. The hydraulic system applied to the photovoltaic equipment comprises a hydraulic cylinder, the hydraulic cylinder comprises a cylinder body and a piston rod, the cylinder body comprises a first wall, the first wall is provided with an extending opening, the piston rod penetrates through the extending opening, and the hydraulic system further comprises a mounting part, a sleeve body, an elastic part, a ring body and an elastic shielding part. The mounting part is connected to the first wall and provided with a through hole, and the piston rod penetrates through the through hole. The piston rod is sleeved with the sleeve body. The elastic piece is connected to the sleeve body and the mounting part, the ring body is arranged on the mounting part and arranged around the piston rod in the circumferential direction, and a plurality of air holes are formed in the circumferential wall of the ring body. The elastic shielding part is in a hollow frustum shape, the small-diameter side of the elastic shielding part is connected to the sleeve body, and the large-diameter side of the elastic shielding part is connected to the ring body. The hydraulic cylinder can reduce the risk of dust accumulation.

Description

Technical Field

[0001] The present invention belongs to the technical field of hydraulic equipment, and in particular relates to a hydraulic system applied to photovoltaic equipment. Background Art

[0002] A hydraulic cylinder typically consists of a cylinder body, a piston, and a piston rod. The piston is located within the cylinder body and, under the action of oil pressure, moves linearly along the cylinder chamber. The cylinder body is provided with an extension port, through which the piston rod is inserted into the cylinder body and connected to the piston, allowing the piston to move along with the piston rod. The extension port is typically formed in the cylinder head of the cylinder body.

[0003] Hydraulic cylinders are widely used in various fields, including the photovoltaic industry. For example, hydraulic cylinders are currently used to lift photovoltaic panels during installation. Another example is that some photovoltaic systems integrate multiple panels, which need to be unfolded for use. Hydraulic cylinders can be used to power the panel unfolding mechanism.

[0004] Dust accumulation at the end of the extension port of the cylinder body is a common problem for hydraulic cylinders, especially in the photovoltaic field. Hydraulic cylinders are mostly used in harsh outdoor environments, which makes the dust accumulation problem more serious. Dust accumulation at the end causes the hard particles in the dust to come into contact with the piston rod for a long time. During the movement of the piston rod, it may cause a variety of problems such as piston rod wear and reduced sealing effect of the sealing ring, which in turn leads to reduced working reliability of the hydraulic cylinder. To address this problem, a dust ring is provided on the inner wall of the extension port of a common hydraulic cylinder, but the dust ring can only prevent dust from entering the interior of the cylinder body at the extension port and cannot solve the problem of dust accumulation. Another solution is to install the hydraulic cylinder upside down, that is, when installing the hydraulic cylinder, ensure that the end face where the extension port is provided is facing downward, but this will limit the use of the hydraulic cylinder. In summary, how to reduce the risk of dust accumulation at the end is an urgent problem that needs to be solved for hydraulic cylinders. Summary of the Invention

[0005] The object of the present invention is to provide a hydraulic system for photovoltaic equipment, which can reduce the risk of dust accumulation at the end of the extension port of the hydraulic cylinder.

[0006] In order to achieve the above-mentioned purpose of the invention, the technical solution adopted by the present invention is as follows: The embodiment of the present application provides a hydraulic system for photovoltaic equipment, including a hydraulic cylinder, the hydraulic cylinder including a cylinder body and a piston rod, the cylinder body including a first wall, the first wall being provided with an extension port, the piston rod being passed through the extension port, and further including a mounting portion, a sleeve, an elastic member, a ring body and an elastic shielding portion. The mounting portion is connected to the first wall, the mounting portion being provided with a through hole, the piston rod being passed through the through hole. The sleeve body is sleeved on the piston rod, and the sleeve body is configured so that when the stroke of the piston rod moving out of the cylinder reaches a set value, the tightening force of the sleeve body on the piston rod is reduced. The elastic member is connected to the sleeve body and the mounting portion, the ring body is provided on the mounting portion, the ring body is arranged circumferentially around the piston rod, and the peripheral wall of the ring body is provided with a plurality of air holes. The elastic shielding portion is in the shape of a hollow cone, the small diameter side of the elastic shielding portion is connected to the sleeve body, and the large diameter side is connected to the ring body.

[0007] In some embodiments, it also includes two mating parts, which are mated to form a sleeve body, and the ends of the two mating parts are respectively rotatably provided with elastic limiting parts, and the rotation axis of the elastic limiting part is parallel to the axial direction of the sleeve body. The movable ends of the two elastic limiting parts abut against each other, and the movable ends protrude from the peripheral wall of the sleeve body. One of the two elastic limiting parts is provided with a guide rod, and the other is provided with a limiting hole. The guide rod is passed through the limiting hole, and a flexible blocking part is provided at the end of the guide rod. The elastic blocking part is connected to the side of the sleeve body away from the first wall.

[0008] In some embodiments, a matching portion is provided on a side of the mating portion away from the first wall, and the matching portions of the two mating portions cooperate to form a disc-shaped structure, and the sleeve is connected to the matching portion.

[0009] In some embodiments, the flexible barrier is shuttle-shaped, one of the two ends of the flexible barrier along the long axis is connected to the guide rod, and a plurality of barrier rings are arranged at intervals on the peripheral wall of the flexible barrier along the long axis.

[0010] In some embodiments, the inner wall of the limiting hole is provided with a plurality of protruding rings, and the plurality of protruding rings are arranged at intervals along the axial direction of the limiting hole.

[0011] In some embodiments, one of the movable ends of the two elastic limiting portions is provided with a convex arc surface, and the other is provided with a concave arc surface, and the convex arc surface is inserted into the concave arc surface.

[0012] In some embodiments, the mounting portion is provided with a reset portion, which includes two bent wall portions, with the inner bent side of the reset portion facing the piston rod, and the sleeve is configured so that when the sleeve moves to the reset portion, the two wall portions abut against the opposite sides of the two elastic limiting portions respectively.

[0013] In some embodiments, guide plates are respectively provided on the tops of the two wall portions, and the guide plates are inclined in a direction gradually away from the sleeve body from a side of the guide plate close to the wall portion to a side away from the wall portion.

[0014] In some embodiments, a plurality of notches are provided at one end of the ring body close to the mounting portion, and the notches form air holes.

[0015] In some embodiments, the cylinder body is rotatably provided with a rotating seat, the piston rod is provided with a connecting sleeve, and the axial direction of the connecting sleeve is perpendicular to the axial direction of the piston rod.

[0016] The present invention has the following beneficial effects: 1. When the piston rod moves out of the cylinder, it drives the sleeve away from the first wall until it reaches the set position. During this process, the peripheral wall of the elastic shield is stretched straight, forming an inclined surface, which facilitates the sliding of dust that has landed on the peripheral wall of the elastic shield onto the mounting portion. The sleeve then reduces its tightening force on the piston rod. Under the action of the elastic member, the sleeve drives the elastic shield to move rapidly toward the mounting portion, allowing the vents to eject gas, blowing away dust that has landed on the mounting portion and reducing the risk of dust accumulation.

[0017] 2. The sleeve can scrape the piston rod. When the piston rod moves toward the inside of the cylinder, the movement of the sleeve is restricted by the elastic member. At this time, the sleeve can scrape the piston rod to remove dust adhering to the piston rod. The accumulated dust stays at the small-diameter end of the elastic shielding part. When the piston rod moves toward the outside of the cylinder next time, the dust can slide down to the mounting part through the inclined surface formed by the elastic shielding part, reducing the risk of dust adhering to the piston rod accumulating on the first wall under the action of the dust ring of the cylinder body. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 Schematic diagram of the structure of the hydraulic cylinder of the present invention (showing the sleeve-shaped structure); Figure 2 Schematic diagram of the structure of the hydraulic cylinder of the present invention (showing the elastic shielding portion); Figure 3 It is a structural schematic diagram of the hydraulic cylinder of the present invention (elastic shielding portion is partially opened); Figure 4 for Figure 3 A magnified view of point A; Figure 5 It is a structural schematic diagram of the hydraulic cylinder of the present invention (with the elastic shielding portion and the ring body removed); Figure 6 for Figure 5 Enlarged view of point B; Figure 7 for Figure 6 Enlarged view of point C; Figure 8 A schematic structural diagram of the hydraulic cylinder of the present invention (viewed from above after the elastic shielding portion and the mating portion are removed, with the movable end of the elastic limiting portion provided with a convex arc surface and a concave arc surface); Figure 9 for Figure 8 Enlarged view of point D.

[0019] Figure numbers: 1-hydraulic cylinder, 11-cylinder body, 12-piston rod, 13-sleeve structure, 14-connecting sleeve, 15-rotating seat, 21-mounting part, 22-ring body, 23-elastic shielding part, 24-sleeve body, 25-matching part, 26-matching part, 27-elastic limiting part, 28-elastic member, 29-notch groove, 211-resetting part, 210-guide plate, 212-flexible blocking part, 213-convex ring, 214-limiting hole, 215-guide rod, 216-blocking ring, 217-rubber pad. DETAILED DESCRIPTION

[0020] The following will be combined with the accompanying drawings 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, not all of them. Unless otherwise specified, the technical means used in the embodiments are conventional means well known to those skilled in the art.

[0021] In the description of the present invention, it should be understood that the terms "longitudinal", "transverse", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0022] See also Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 and Figure 5The embodiment of the present application provides a hydraulic system for photovoltaic equipment, including a hydraulic cylinder 1, which includes a cylinder body 11 and a piston rod 12. The cylinder body 11 includes a first wall, the first wall is provided with an extension port, and the piston rod 12 is inserted into the extension port. The system also includes a mounting portion 21, a sleeve 24, an elastic member 28, a ring body 22, and an elastic shielding portion 23. The mounting portion 21 is connected to the first wall, and the mounting portion 21 is provided with a through hole, and the piston rod 12 is inserted into the through hole. The sleeve 24 is sleeved on the piston rod 12, and the sleeve 24 is configured to reduce the tightening force of the sleeve 24 on the piston rod 12 when the stroke of the piston rod 12 moving out of the cylinder body 11 reaches a set value. The elastic member 28 is connected to the sleeve 24 and the mounting portion 21, and the ring body 22 is provided on the mounting portion 21. The ring body 22 is arranged around the circumference of the piston rod 12, and the circumferential wall of the ring body 22 is provided with multiple air holes. The elastic shielding portion 23 is in a hollow frustum shape. The small diameter side of the elastic shielding portion 23 is connected to the sleeve body 24 , and the large diameter side is connected to the ring body 22 .

[0023] The hydraulic cylinder 1 of the embodiment of the present application can be used to drive the photovoltaic panel to rotate or move. For example, if the photovoltaic panel is rotatably mounted on a fixed frame, the hydraulic cylinder 1 can be installed on the fixed frame, and the photovoltaic panel can be lifted and rotated by the piston rod 12. For another example, if the photovoltaic panel is movably mounted on the fixed frame, the hydraulic cylinder 1 can be installed on the fixed frame, and the photovoltaic panel can be pushed and moved by the piston rod 12.

[0024] The hydraulic cylinder 1 of the embodiment of the present application may be a bidirectional oil cylinder, that is, the piston rod 12 may move into or out of the cylinder body 11 under the drive of hydraulic pressure.

[0025] The extension port is used to enable the piston rod 12 to be connected to the piston in the cylinder body 11 , so that the piston can drive the piston rod 12 to move.

[0026] On the one hand, the mounting portion 21 is used for mounting and fixing other components such as the ring body 22 and the elastic member 28 . On the other hand, the mounting portion 21 can shield the first wall to reduce the risk of dust falling into the extension port or accumulating on the first wall.

[0027] The specific connection structure between the mounting portion 21 and the cylinder body 11 can be selected from existing structures. For example, an existing cylinder body 11 includes a sleeve structure 13, and the piston rod 12 passes through the sleeve structure 13 into the interior of the cylinder body 11, then the mounting portion 21 can be sleeved on the sleeve structure 13.

[0028] The sleeve 24 is sleeved on the piston rod 12 so that when the piston rod 12 moves, the piston rod 12 can drive the sleeve 24 to move. The sleeve 24 and the piston rod 12 are fixed in relative position by friction, so that the sleeve 24 does not hinder the movement of the piston rod 12.

[0029] When the piston rod 12 moves out of the cylinder body 11 to the set position, the tightening force of the sleeve 24 on the piston rod 12 is reduced. At this time, the friction between the sleeve 24 and the piston rod 12 is reduced, and the piston rod 12 can no longer drive the sleeve 24 to move with it.

[0030] The elastic member 28 can be a spring. When the piston rod 12 moves out of the cylinder body 11, the sleeve body 24 pulls the elastic member 28, causing the elastic member 28 to deform, thereby allowing the elastic member 28 to provide an elastic force to move the sleeve body 24 toward the mounting portion 21.

[0031] The elastic shielding portion 23 is a hollow sleeve structure made of elastic material, for example, can be made of rubber material. The sleeve body 24 closes the small end of the elastic shielding portion 23, and the ring body 22 closes the large end of the elastic shielding portion 23.

[0032] The outer peripheral wall of the elastic shielding portion 23 may be provided with a coating that reduces friction, so that dust can slide off more easily.

[0033] The operating principle of the hydraulic cylinder 1 according to the embodiment of the present application is as follows: when the piston rod 12 moves outward from the cylinder body 11, the piston rod 12 drives the sleeve 24 to move away from the first wall until the sleeve 24 reaches the set position. During this process, the peripheral wall of the elastic shielding portion 23 is straightened, forming an inclined surface, which facilitates the sliding of dust that lands on the peripheral wall of the elastic shielding portion 23 onto the mounting portion 21. Because the piston rod 12 moves relatively slowly, dust on the mounting portion 21 is not drawn into the ring body 22 through the air vent during this process.

[0034] Afterwards, the tightening force of the sleeve 24 on the piston rod 12 is reduced. Under the action of the elastic member 28, the sleeve 24 drives the elastic shielding portion 23 to move quickly toward the mounting portion 21, so that the air vent can spray gas to blow away the dust that falls on the mounting portion 21, reducing the risk of dust accumulation.

[0035] For the hydraulic cylinder 1 in the prior art, dust adhered to the piston rod 12 is easily accumulated on the first wall under the action of the dust ring inside the extension port when the piston rod 12 moves into the extension port.

[0036] In the embodiment of the present application, when the piston rod 12 moves toward the inside of the cylinder body 11, the movement of the sleeve 24 is restricted under the action of the elastic member 28. Therefore, when the piston rod 12 moves into the cylinder body 11, relative sliding can occur between the sleeve 24 and the piston rod 12. At this time, the sleeve 24 can scrape the piston rod 12 to remove dust adhering to the piston rod 12. The accumulated dust stays at the small diameter end of the elastic shielding portion 23. The dust can slide down to the mounting portion 21 through the inclined surface formed by the elastic shielding portion 23 when the piston rod 12 moves to the outside of the cylinder body 11 next time, reducing the risk of dust adhering to the piston rod 12 accumulating on the first wall under the action of the dustproof ring of the cylinder body 11.

[0037] Other auxiliary equipment adapted for the hydraulic cylinder 1, such as a hydraulic station, are well known to those skilled in the art. The technical solution of this application does not improve these auxiliary equipment, and thus they will not be described in detail.

[0038] See also Figure 6 In some embodiments, two mating parts 25 are further included, and the two mating parts 25 are mated to form a sleeve body 24. The ends of the two mating parts 25 are respectively rotatably provided with elastic limiting parts 27. The rotation axis of the elastic limiting part 27 is parallel to the axial direction of the sleeve body 24. The movable ends of the two elastic limiting parts 27 abut against each other, and the movable ends protrude from the peripheral wall of the sleeve body 24. One of the two elastic limiting parts 27 is provided with a guide rod 215, and the other is provided with a limiting hole 214. The guide rod 215 is passed through the limiting hole 214, and a flexible blocking part 212 is provided at the end of the guide rod 215. The elastic shielding part 23 is connected to the side of the sleeve body 24 away from the first wall.

[0039] The two mating parts 25 form a sleeve 24, so that there is a certain gap between the two mating parts 25. Although a very small amount of dust may enter the space enclosed by the elastic shielding part 23 and the ring body 22 through the gap between the two mating parts 25, when the sleeve 24 moves toward the first wall, the airflow can blow out this part of the dust. Even if a small amount adheres to the inner wall of the ring body 22, it will not contact the piston rod 12 and have an adverse effect on the hydraulic cylinder 1.

[0040] The elastic limiting portion 27 can be made of a metal material that can produce elastic deformation.

[0041] The flexible barrier portion 212 can be made of rubber and is configured so that when it is not deformed, the flexible barrier portion 212 cannot pass through the limiting hole 214, and can only pass through the limiting hole 214 when the force applied to the flexible barrier portion 212 reaches a threshold.

[0042] The movable ends of the two elastic shielding parts 23 abut against each other to form a triangle-like structure.

[0043] When the two elastic limiting parts 27 are closed until their movable ends abut against each other, the guide rod 215 passes through the limiting hole 214, so that the flexible blocking part 212 can pass through between the two elastic limiting parts 27, thereby allowing the two elastic limiting parts 27 to remain in a closed state. At this time, the sleeve 24 can be tightly clamped on the piston rod 12, and the piston rod 12 can drive the sleeve 24 to move, and the friction force between the sleeve 24 and the piston rod 12 can meet the requirement that the elastic shielding part 23 applies pressure on the movable end to cause the elastic deformation part 27 to deform.

[0044] The elastic shielding portion 23 is connected to the side of the sleeve 24 away from the first wall. On the one hand, this can increase the inclination of the elastic shielding portion 23 when it is stretched straight, making it easier for dust to slide off. On the other hand, because the movable end protrudes from the peripheral wall of the sleeve 24, when the sleeve 24 moves to the set position, the elastic shielding portion 23 can apply pressure to the movable end. During this process, the middle portions of the two elastic limiting portions 27 separate from each other, allowing the guide rod 215 to pull the flexible blocking portion 212 through the limiting hole 214 and move between the two elastic limiting portions 27. At this time, the tightening force of the two mating portions 25 on the piston rod 12 is reduced, allowing the elastic member 28 to pull the sleeve 24 toward the first wall. On the other hand, when the movable end of the elastic limiting portion 27 abuts against the inner wall of the elastic shielding portion 23, it can increase the straightening effect of the elastic shielding portion 23, thereby improving the dust discharge effect.

[0045] In the embodiment of the present application, the guide rod 215 can be arranged on the opposite side of one elastic limiting portion 27 and the other elastic limiting portion 27. The relative position of the guide rod 215 and the limiting hole 214 can be set to various positions according to actual needs and can be selected according to actual conditions during implementation, as long as it can meet the requirement that when the middle portions of the two elastic limiting portions 27 are separated from each other, the guide rod 215 can pull the flexible blocking portion 212 out of the limiting hole 214. When the movable ends of the two elastic limiting portions 27 abut against each other, the guide rod 215 can carry the flexible blocking portion 212 through the limiting hole 214.

[0046] See also Figure 6 In some embodiments, a mating portion 26 is provided on a side of the mating portion 25 away from the first wall. The mating portions 26 of the two mating portions 25 cooperate to form a disc-shaped structure, and the sleeve 24 is connected to the mating portion 26 .

[0047] On one hand, the mating portion 26 allows the elastic shielding portion 23 to have a longer axial length, thereby increasing the inclination of the elastic shielding portion 23 when in its stretched state. On the other hand, the disc-shaped structure of the mating portion 26 increases the scraping area of ​​the sleeve 24 against the piston rod 12. Furthermore, the connection of the sleeve 24 to the mating portion 26 ensures that even after the flexible blocking portion 212 loses its securing effect on the two elastic stoppers 27, the two mating portions 25 remain connected and prevent them from detaching from the piston rod 12.

[0048] See also Figure 7 In some embodiments, the flexible blocking portion 212 is spindle-shaped, and one of the two ends of the flexible blocking portion 212 along the long axis direction is connected to the guide rod 215. Along the long axis direction of the flexible blocking portion 212, a plurality of blocking rings 216 are arranged at intervals on the peripheral wall of the flexible blocking portion 212.

[0049] Since the flexible blocking portion 212 is in a shuttle shape, the diameter of the blocking ring 216 can gradually increase from the two ends of the long axis to the middle of the flexible blocking portion 212 .

[0050] The shuttle-shaped structure of the flexible barrier 212 facilitates the insertion of the flexible barrier 212 into the limiting hole 214. On the other hand, under the action of the blocking ring 216, the flexible barrier 212 can produce a stuck effect when passing through the end of the limiting hole 214, thereby improving the limiting effect of the flexible barrier 212 on the two elastic limiting parts 27 and allowing the elastic shielding part 23 in contact with the elastic limiting part 27 to vibrate, thereby reducing the risk of dust adhering to the elastic limiting part 27 and preventing it from sliding off.

[0051] Furthermore, the guide rod 215 can be connected to the elastic limiting portion 27 at a variable angle within a certain range, so that even if the flexible blocking portion 212 is not directly facing the limiting hole 214, the guide rod 215 can still drive the flexible blocking portion 212 to be inserted into the limiting hole 214. For example, the elastic limiting portion 27 can be provided with a rubber pad 217, and the guide rod 215 can be connected to the elastic limiting portion 27 via the rubber pad 217, so that the guide rod 215 can deflect relative to the elastic limiting portion 27 within a certain range.

[0052] See also Figure 7 and Figure 9 In some embodiments, a plurality of protruding rings 213 are provided on the inner wall of the limiting hole 214 , and the plurality of protruding rings 213 are spaced apart along the axial direction of the limiting hole 214 .

[0053] On the one hand, the convex ring 213 can improve the limiting effect of the flexible blocking part 212 on the two elastic limiting parts 27. On the other hand, when the flexible blocking part 212 passes through the convex ring 213, the flexible blocking part 212 can be stuck, thereby causing the elastic shielding part 23 in contact with the elastic limiting part 27 to vibrate.

[0054] See also Figure 8 and Figure 9 In some embodiments, one of the movable ends of the two elastic limiting portions 27 is provided with a convex arc surface, and the other is provided with a concave arc surface, and the convex arc surface is inserted into the concave arc surface.

[0055] The convex arc surface is inserted into the concave arc surface. On the one hand, when the elastic shielding portion 23 applies pressure to the two elastic limiting portions 27, the movable ends of the two elastic limiting portions 27 can rotate relative to each other, thereby separating the middle portions of the two elastic limiting portions 27 from each other. This not only facilitates the guide rod 215 to pull the flexible blocking portion 212 out of the limiting hole 214, but also increases the contact area of ​​the elastic limiting portion 27 on the elastic shielding portion 23, thereby increasing the straightening effect of the elastic shielding portion 23. On the other hand, the risk of the elastic limiting portion 27 puncturing the elastic shielding portion 23 is reduced.

[0056] See also Figure 6 In some embodiments, the mounting portion 21 is provided with a reset portion 211, and the reset portion 211 includes two bent wall portions, with the inner bent side of the reset portion 211 facing the piston rod 12, and the sleeve 24 is configured so that when the sleeve 24 moves to the reset portion 211, the two wall portions abut against the opposite sides of the two elastic limiting portions 27 respectively.

[0057] When the sleeve 24 approaches the first wall under the action of the elastic member 28, the two elastic stoppers 27 can be inserted between the two walls. Under the restraining action of the two walls, the two elastic stoppers 27 can be reclosed, and the guide rod 215 drives the flexible blocking portion 212 through the stopper hole 214. This is to prepare the sleeve 24 for movement the next time the piston rod 12 extends out of the cylinder 11. Furthermore, when the piston rod 12 moves into the cylinder 11, the sleeve 24 can be in a state of tightly clamping the piston rod 12, increasing the scraping effect of the sleeve 24 on the piston rod 12.

[0058] See also Figure 6 In some embodiments, guide plates 210 are respectively provided on the top of the two walls, and the guide plates 210 are inclined in a direction gradually away from the sleeve body 24 from the side of the guide plate 210 close to the wall to the side away from the wall.

[0059] The guide plate 210 can guide the two elastic limiting portions 27 so that the two elastic limiting portions 27 can move between the two wall portions.

[0060] See also Figure 4 In some embodiments, a plurality of notches 29 are provided at one end of the ring body 22 close to the mounting portion 21 , and the notches 29 form air holes.

[0061] When one end of the ring body 22 close to the mounting portion 21 abuts against the vent hole, the notch groove 29 and the mounting portion 21 form a vent hole, so that the vent hole can be as close to the mounting portion 21 as possible, thereby increasing the dust blowing effect on the mounting portion 21.

[0062] See also Figure 1 and Figure 2 In some embodiments, the cylinder body 11 is rotatably provided with a rotating seat 15 , and the piston rod 12 is provided with a connecting sleeve 14 , and the axial direction of the connecting sleeve 14 is perpendicular to the axial direction of the piston rod 12 .

[0063] The rotation axis of the rotating seat 15 and the axis of the connecting sleeve 14 can be arranged in parallel.

[0064] The swivel base 15 allows the cylinder body 11 to rotate after being fixed, and the connecting sleeve 14 allows the piston rod 12 to be rotatably connected to the force application point. Taking a photovoltaic panel as an example, the photovoltaic panel is rotatably mounted on a fixed frame. In this way, the swivel base 15 can be fixed to the mounting base, and a rotating shaft is provided on the photovoltaic panel. The rotating shaft passes through the connecting sleeve 14, allowing the piston rod 12 to be rotatably connected to the photovoltaic panel. In this way, the photovoltaic panel can be driven to rotate by the hydraulic cylinder 1.

[0065] The above embodiments are merely descriptions of preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Without departing from the spirit of the present invention, various deformations, modifications, and substitutions made by ordinary technicians in this field to the technical solutions of the present invention should all fall within the scope of protection determined by the claims of the present invention.

Claims

1. A hydraulic system for photovoltaic equipment, comprising a hydraulic cylinder (1), wherein the hydraulic cylinder (1) comprises a cylinder body (11) and a piston rod (12), wherein the cylinder body (11) comprises a first wall, wherein the first wall is provided with an extension opening, and the piston rod (12) is provided through the extension opening, wherein: Also includes: A mounting portion (21) connected to the first wall, the mounting portion (21) being provided with a through hole, and the piston rod (12) passing through the through hole; a sleeve (24) sleeved on the piston rod (12), wherein the sleeve (24) is configured such that when the stroke of the piston rod (12) moving out of the cylinder (11) reaches a set value, the clamping force of the sleeve (24) on the piston rod (12) is reduced; an elastic member (28) connected to the sleeve (24) and the mounting portion (21); A ring body (22) is provided on the mounting portion (21), the ring body (22) is provided around the circumference of the piston rod (12), and a peripheral wall of the ring body (22) is provided with a plurality of air holes; The elastic shielding portion (23) is in the shape of a hollow cone, and the small diameter side of the elastic shielding portion (23) is connected to the sleeve body (24), and the large diameter side is connected to the ring body (22).

2. The hydraulic system for photovoltaic equipment according to claim 1, characterized in that: The invention also includes two mating parts (25), the two mating parts (25) are mated to form the sleeve (24), the ends of the two mating parts (25) are respectively rotatably provided with elastic limiting parts (27), the rotation axis of the elastic limiting parts (27) is parallel to the axial direction of the sleeve (24), the movable ends of the two elastic limiting parts (27) abut against each other, and the movable ends protrude from the peripheral wall of the sleeve (24), one of the two elastic limiting parts (27) is provided with a guide rod (215), and the other is provided with a limiting hole (214), the guide rod (215) is passed through the limiting hole (214), the end of the guide rod (215) is provided with a flexible blocking part (212), and the elastic blocking part (23) is connected to the side of the sleeve (24) away from the first wall.

3. The hydraulic system for photovoltaic equipment according to claim 2, characterized in that: A matching portion (26) is provided on one side of the mating portion (25) away from the first wall. The matching portions (26) of the two mating portions (25) match to form a disc-shaped structure. The sleeve (24) is connected to the matching portion (26).

4. The hydraulic system for photovoltaic equipment according to claim 2, characterized in that: The flexible blocking portion (212) is in a shuttle shape, one of the two ends of the flexible blocking portion (212) along the longitudinal direction is connected to the guide rod (215), and a plurality of blocking rings (216) are provided at intervals on the peripheral wall of the flexible blocking portion (212) along the longitudinal direction of the flexible blocking portion (212).

5. The hydraulic system for photovoltaic equipment according to claim 4, characterized in that: The inner wall of the limiting hole (214) is provided with a plurality of convex rings (213), and the plurality of convex rings (213) are arranged at intervals along the axial direction of the limiting hole (214).

6. The hydraulic system for photovoltaic equipment according to claim 2, characterized in that: One of the movable ends of the two elastic limiting parts (27) is provided with a convex arc surface, and the other is provided with a concave arc surface, and the convex arc surface is inserted into the concave arc surface.

7. The hydraulic system for photovoltaic equipment according to claim 2, characterized in that: The mounting portion (21) is provided with a reset portion (211), and the reset portion (211) includes two bent wall portions, with the inner bent side of the reset portion (211) facing the piston rod (12), and the sleeve (24) is configured so that when the sleeve (24) moves to the reset portion (211), the two wall portions abut against opposite sides of the two elastic limiting portions (27).

8. The hydraulic system for photovoltaic equipment according to claim 7, characterized in that: A guide plate (210) is respectively provided on the top of the two wall portions, and the guide plate (210) is tilted in a direction gradually away from the sleeve (24) from the side of the guide plate (210) close to the wall portion to the side away from the wall portion.

9. The hydraulic system for photovoltaic equipment according to claim 1, characterized in that: A plurality of notched grooves (29) are provided at one end of the ring body (22) close to the mounting portion (21), and the notched grooves (29) form the air holes.

10. The hydraulic system for photovoltaic equipment according to claim 1, characterized in that: The cylinder body (11) is rotatably provided with a rotating seat (15), and the piston rod (12) is provided with a connecting sleeve (14), and the axial direction of the connecting sleeve (14) is perpendicular to the axial direction of the piston rod (12).

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