Bevel gear for photovoltaic tracking gearbox

Abstract

The utility model relates to a bevel gear for a photovoltaic tracking gearbox, and relates to the field of photovoltaic tracking gearboxes, the bevel gear comprises a gear body, a tooth surface is formed on the gear body, an oil groove is formed in the tooth surface, a gear block is provided with a thermal expansion and cold contraction pad, and the thermal expansion and cold contraction pad is located in the oil groove. The oil groove is formed in the tooth surface, and the thermal expansion and cold contraction pad is arranged in the gear body, so that when the external temperature is low, part of lubricating oil covering the gear enters the oil groove, and the thickness of an oil film on the tooth surface can be reduced. Along with the rise of external temperature, the thermal expansion and cold contraction pad expands to extrude lubricating oil in the oil groove, and the thickness of an oil film on the tooth surface is increased.

Description

Technical Field

[0001] This utility model belongs to the field of photovoltaic tracking gearbox technology, and specifically refers to a bevel gear for a photovoltaic tracking gearbox. Background Technology

[0002] A photovoltaic (PV) tracking system is a device that maximizes solar radiation reception by adjusting the angle of PV modules. One of its core components is the PV tracking gearbox. The bevel gear in the gearbox, as a key transmission element, plays a crucial role in converting the rotational motion of the drive motor into the angle adjustment of the PV modules.

[0003] The bevel gears in the gearbox are mostly stationary, only working briefly during adjustments. Therefore, they need to be started and stopped frequently during use. The photovoltaic tracking gearbox requires an oil film to be applied to the surface of the bevel gears before they start working.

[0004] Photovoltaic tracking systems are typically installed outdoors, where there are significant temperature differences between day and night, especially in areas with long hours of sunshine. During the day, the high temperatures cause the lubricating oil viscosity to decrease and the oil film to become thinner, which may lead to insufficient lubrication. At low temperatures, the lubricating oil viscosity increases and the oil film becomes too thick, which may increase starting resistance. These issues need to be addressed. Summary of the Invention

[0005] The purpose of this invention is to provide a bevel gear for a photovoltaic tracking gearbox to solve the technical problems mentioned in the background section.

[0006] This utility model is implemented as follows:

[0007] A bevel gear for a photovoltaic tracking gearbox includes a gear body with toothed surfaces machined on it. An oil groove is formed on the toothed surfaces, and a thermal expansion and contraction pad is provided on the gear block, with the thermal expansion and contraction pad located in the oil groove.

[0008] Preferably, the gear body is provided with an oil-absorbing pad, the oil-absorbing pad is located in the oil groove, and the thermal expansion and contraction pad is located on the side of the oil-absorbing pad away from the opening of the oil groove.

[0009] Preferably, a limiting groove is formed on the gear body, the limiting groove is connected to the oil groove, and the limiting groove is for the oil-absorbing pad to be inserted.

[0010] Preferably, the end of the oil-absorbing pad away from the bottom of the oil trough is joined to the gear body to form a sink groove.

[0011] Preferably, the oil groove is arranged around the gear body, and there are several thermal expansion and contraction pads, which are evenly distributed around the axis of the gear body.

[0012] Preferably, the thermal expansion and contraction pad includes a mounting part and a thermal expansion and contraction part, both of which are slidably connected to the gear body. The mounting part is located on the side of the thermal expansion and contraction part away from the oil absorbent pad. The mounting part slides into or out of the oil groove. The mounting part is provided with a guide surface one, which is inclined away from the thermal expansion and contraction part along the direction of insertion into the oil groove. The thermal expansion and contraction part abuts against the guide surface one. A drive rod is slidably connected to the gear body. The sliding direction of the drive rod is parallel to the sliding direction of the thermal expansion and contraction part. The mounting part is provided with a guide surface two, which is inclined away from the oil groove along the direction away from the drive rod. The drive rod abuts against the guide surface two. An elastic element is provided on the gear body. The elastic element abuts against the mounting part, causing the mounting part to tend to move out of the oil groove and causing the drive rod to tend to move into the gear groove.

[0013] Preferably, the drive rod includes a rod portion and a ball bearing, the ball bearing being rotatably connected to the rod portion, the rod portion abutting against the guide surface, and the elastic element being connected to the rod portion, so that the ball bearing extends into the tooth groove of the tooth surface.

[0014] Preferably, the oil-absorbing pad is elastic and presses against the thermally expanding and contracting part so that the thermally expanding and contracting part presses against the guide surface for positioning.

[0015] The outstanding advantages of this utility model compared to the prior art are:

[0016] 1. This utility model involves creating oil grooves on the gear teeth and installing thermal expansion and contraction pads inside the gear body. When the external temperature is low, some of the lubricating oil covering the gear enters the oil grooves, which helps reduce the thickness of the oil film on the gear teeth. As the external temperature rises, the thermal expansion and contraction pads expand, squeezing out the lubricating oil from the oil grooves and increasing the thickness of the oil film on the gear teeth.

[0017] 2. This utility model helps to reduce the loss of lubricating oil in the oil tank by setting an oil-absorbing pad in the oil tank;

[0018] 3. This utility model utilizes the cooperation between the drive rod and the mounting part. When the bevel gear is not working, the elastic element tightens the mounting part, causing it to partially lie outside the oil groove. The guide surface two abuts against the drive rod, causing the drive rod to extend into the tooth groove. When the bevel gear is working, its tooth surface meshes with other bevel gears, and the teeth engage with the tooth groove, causing the drive rod to disengage from the tooth groove and move towards the guide surface two. This allows the mounting part to move and extend into the oil groove, reducing the distance between the guide surface one and the oil-absorbing pad. This facilitates the expansion and compression of the oil-absorbing part by the thermal expansion and contraction part. When the ambient temperature is high but the bevel gear is not working, the drive rod extends into the tooth groove, and the distance between the mounting part and the guide surface one is larger, reducing the compression of the oil-absorbing pad by the thermal expansion and contraction part. This is beneficial for preserving lubricating oil at high temperatures. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0020] Figure 2 This is a cross-sectional view of the present invention, mainly showing the distribution relationship of the thermal expansion and contraction pads;

[0021] Figure 3 This is a partial sectional view from another perspective of the present invention, mainly showing the structural relationship between the drive rod and the thermal expansion and contraction pad.

[0022] Instruction manual drawing reference numerals: 1. Gear body; 11. Tooth surface; 12. Oil groove; 121. Limiting surface; 122. Sliding groove; 13. Limiting groove; 14. Telescopic groove; 2. Oil absorbent pad; 21. Sinking groove; 3. Thermal expansion and contraction pad; 31. Thermal expansion and contraction part; 32. Mounting part; 321. Elastic element; 322. Spring; 323. Guide surface one; 324. Guide surface two; 4. Drive rod; 41. Rod part; 42. Ball bearing. Detailed Implementation

[0023] The present invention will be further described below with reference to specific embodiments. See also: Figure 1 —3:

[0024] This application discloses a bevel gear for a photovoltaic tracking gearbox. See also: Figure 1 and Figure 2 The gear body 1 includes a gear body 1, on which a tooth surface 11 is machined. An oil groove 12 is formed on the tooth surface 11. The oil groove 12 is arranged around the outer periphery of the gear body 1. An oil-absorbing pad 2 is embedded in the oil groove 12. The oil-absorbing pad 2 is formed by splicing together several oil-absorbing cottons. The oil-absorbing pad 2 is arranged around the outer periphery of the axis of the gear body 1. The outer ring surface of the oil-absorbing pad 2 is spliced ​​with the gear body 1 to form a groove 21. The oil-absorbing pad 2 is used to absorb lubricating oil. When the oil-absorbing pad 2 is squeezed, it releases lubricating oil and returns to its shape after being released.

[0025] See Figure 2 and Figure 3 A limiting groove 13 is provided on the gear body 1. The distribution direction of the limiting groove 13 and the oil groove 12 is parallel to the axis of the gear body 1, and the limiting groove 13 and the oil groove 12 are connected. The limiting groove 13 is used for the oil suction pad 2 to be partially engaged and positioned, which facilitates the replacement of the oil suction pad 2.

[0026] See Figure 2 and Figure 3 A number of thermal expansion and contraction pads 3 are installed on the gear body 1. The thermal expansion and contraction pads 3 are evenly distributed at equal intervals around the outer circumference of the gear body 1 axis. The thermal expansion and contraction pads 3 are located on the side of the oil absorption pad 2 close to the axis of the gear body 1. The thermal expansion and contraction pads 3 are located in the oil groove 12. The thermal expansion and contraction pads 3 are used to squeeze the oil absorption pad 2 after being heated and expanded.

[0027] See Figure 2 Several limiting surfaces 121 are machined on the inner wall of the oil groove 12. The limiting surfaces 121 are spaced around the outer periphery of the gear body 1 axis, and each thermal expansion and contraction pad 3 corresponds to two limiting surfaces 121.

[0028] See Figure 2 and Figure 3 The thermal expansion and contraction pad 3 includes a thermal expansion and contraction part 31 and a mounting part 32. The mounting part 32 is located on the side of the thermal expansion and contraction part 31 away from the oil absorbent pad 2. The mounting part 32 and the thermal expansion and contraction part 31 are slidably connected to the gear body 1. The sliding directions of the mounting part 32 and the thermal expansion and contraction part 31 are perpendicular to each other. A sliding groove 122 is provided on the inner wall of the oil groove 12. There are several sliding grooves 122. The position and number of sliding grooves 122 correspond one-to-one with the position and number of mounting parts 32. The sliding groove 122 is located on the side of the oil absorbent pad 2 close to the axis of the gear body 1. The sliding groove 122 is located on one side of the oil groove 12. The distribution direction of the sliding groove 122 and the oil groove 12 is parallel to the axis of the gear body 1. The thermal expansion and contraction part 31 is located in the oil groove 12. The mounting part 32 is located in the sliding groove 122 and the oil groove 12. The mounting part 32 slides into or out of the oil groove 12. An elastic element 321 is fixed on the gear body 1. The elastic element 321 is a spring 322. The position and number of springs 322 correspond one-to-one with the position and number of sliding grooves 122. The springs 322 are located in the corresponding sliding grooves 122. The springs 322 are located on the side of the mounting part 32 away from the oil groove 12. The two ends of the springs 322 are fixedly connected to the mounting part 32 and the gear body 1, respectively. The springs 322 tighten the mounting part 32, causing the mounting part 32 to have a tendency to move out of the oil groove 12.

[0029] See Figure 1 and Figure 3 The mounting part 32 has a guide surface 323 formed at one end near the thermal expansion and contraction part 31. The guide surface 323 is inclined and is inclined away from the thermal expansion and contraction part 31 along the direction of extending into the oil groove 12. The end of the thermal expansion and contraction part 31 near the mounting part 32 is attached to the guide surface 323. The thermal expansion and contraction part 31 is slidably connected relative to the mounting part 32. The oil absorbent pad 2 presses against the other end of the thermal expansion and contraction part 31 so that the thermal expansion and contraction part 31 is attached to the guide surface 323. The mounting part 32 moves and extends into the oil groove 12. The thermal expansion and contraction part 31 moves along the guide surface 323 towards the oil absorbent pad 2. After the thermal expansion and contraction part 31 expands, it is easier to squeeze out the lubricating oil in the oil absorbent pad 2.

[0030] When the mounting part 32 moves out of the oil groove 12, the oil-absorbing pad 2 restores its deformation, causing the mounting part 32 to move away from the oil-absorbing pad 2 along the inclined direction of the guide surface 323, thereby reducing the amount of lubricating oil squeezed out by the oil-absorbing pad 2 after the thermal expansion and contraction part 31 expands.

[0031] See Figure 1 and Figure 3 A plurality of drive rods 4 are slidably connected to the gear body 1. The drive rods 4 are spaced apart around the outer circumference of the gear body 1 axis. The position and number of drive rods 4 correspond one-to-one with the position and number of mounting parts 32. A plurality of telescopic grooves 14 are provided on the tooth surface 11. The position and number of telescopic grooves 14 correspond one-to-one with the position and number of drive rods 4. The position and number of telescopic grooves 14 correspond one-to-one with the position and number of sliding grooves 122. The telescopic grooves 14 are connected to the corresponding sliding grooves 122. The telescopic grooves 14 are for the corresponding drive rods 4 to be inserted into. The drive rods 4 slide into or out of the tooth surface 11. The sliding direction of the drive rods 4 is parallel to the radial direction of the gear body 1.

[0032] See Figure 1 and Figure 3 The drive rod 4 includes a rod portion 41 and a ball 42. The rod portion 41 is located in the corresponding telescopic groove 14, and the ball 42 is located on the side of the rod portion 41 away from the corresponding mounting portion 32. The movement of the rod portion 41 drives the ball 42 to extend into or out of the tooth groove for contact with another bevel gear. A guide surface 324 is machined on the mounting part 32. Guide surface 324 and guide surface 323 are both located on the same side of the mounting part 32. The distribution direction of guide surface 323 and guide surface 324 is parallel to the sliding direction of the mounting part 32. Guide surface 324 is located on the side of the mounting part 32 closer to the rod 41. Guide surface 324 is inclined, moving away from the rod 41 and away from the oil groove 12. The end of the rod 41 closest to the mounting part 32 is in contact with the mounting part 32. The mounting part 32 is slidably connected to the rod 41. The sliding direction between the mounting part 32 and the rod 41 is parallel to the inclination direction of guide surface 324. A limiting protrusion is machined on the mounting part 32, limiting the mounting part 32 and the rod 41. The mounting part 32 supports the rod 41, allowing the ball 42 to extend into the tooth groove.

[0033] When the ambient temperature is low, the lubricating oil on the surface of the tooth surface 11 enters the oil groove 12 and is absorbed by the oil absorbent pad 2, which helps to reduce the thickness of the oil film on the surface of the tooth surface 11 when the temperature is low.

[0034] When the temperature is high, the bevel gears work, and the teeth of the adjacent bevel gears engage with the tooth grooves, causing the ball bearing 42 to extend into the telescopic groove 14. This drives the rod part 41 to drive the mounting part 32 to move along the inclined direction of the guide surface 324 and extend into the oil groove 12. This, in turn, drives the thermal expansion and contraction part 31 to move closer to the oil absorption pad 2. The thermal expansion and contraction part 31 expands and squeezes the oil absorption pad 2, causing the lubricating oil in the oil absorption pad 2 to be squeezed out, increasing the thickness of the oil film on the surface of the tooth surface 11.

[0035] When the temperature is high but the gear is not working, the thermal expansion and contraction part 31 only expands, and the pressure on the oil absorption pad 2 is small, reducing the outflow of lubricating oil.

[0036] The implementation principle of a bevel gear for a photovoltaic tracking gearbox in this application embodiment is as follows: through the action of the drive rod 4 and the thermal expansion and contraction pad 3, the oil absorption pad 2 can automatically absorb or squeeze out lubricating oil under different temperature conditions and during working and non-working periods, thereby adjusting the oil film thickness on the surface of the tooth surface 11 and effectively improving the service life of the bevel gear.

[0037] The above embodiments are only one of the preferred embodiments of this utility model and are not intended to limit the scope of implementation of this utility model. Therefore, all equivalent changes made in accordance with the shape, structure and principle of this utility model should be covered within the protection scope of this utility model.

Claims

1. A bevel gear for a photovoltaic tracking gearbox, characterized in that: The gear body (1) includes a gear body (1) on which a tooth surface (11) is formed. An oil groove (12) is provided on the tooth surface (11). A thermal expansion and contraction pad (3) is provided on the gear body (1) and the thermal expansion and contraction pad (3) is located in the oil groove (12).

2. The bevel gear for a photovoltaic tracking gearbox according to claim 1, characterized in that: The gear body (1) is provided with an oil-absorbing pad (2), which is located in the oil groove (12). The thermal expansion and contraction pad (3) is located on the side of the oil-absorbing pad (2) close to the axis of the gear body (1).

3. A bevel gear for a photovoltaic tracking gearbox according to claim 2, characterized in that: A limiting groove (13) is provided on the gear body (1). The limiting groove (13) is connected to the oil groove (12). The limiting groove (13) allows the oil-absorbing pad (2) to be partially locked in and limited.

4. A bevel gear for a photovoltaic tracking gearbox according to claim 2, characterized in that: The oil-absorbing pad (2) is spliced ​​with the gear body (1) to form a sink (21), which is used to hold lubricating oil.

5. A bevel gear for a photovoltaic tracking gearbox according to claim 1, characterized in that: The oil groove (12) is arranged around the circumference of the gear body (1), and there are a plurality of thermal expansion and contraction pads (3), which are evenly distributed around the axis of the gear body (1).

6. A bevel gear for a photovoltaic tracking gearbox according to claim 2, characterized in that: The thermal expansion and contraction pad (3) includes a mounting part (32) and a thermal expansion and contraction part (31). Both the mounting part (32) and the thermal expansion and contraction part (31) are slidably connected to the gear body (1). The mounting part (32) is located on the side of the thermal expansion and contraction part (31) away from the oil absorbent pad (2). The mounting part (32) slides into or out of the oil groove (12). The mounting part (32) is provided with a guide surface (323). The guide surface (323) is inclined away from the thermal expansion and contraction part (31) along the direction of extending into the oil groove (12). The thermal expansion and contraction part (31) abuts against the guide surface (323). The gear body (1) A drive rod (4) is slidably connected. The sliding direction of the drive rod (4) is parallel to the sliding direction of the thermal expansion and contraction part (31). A guide surface (324) is provided on the mounting part (32). The guide surface (324) is inclined away from the oil groove (12) in a direction away from the drive rod (4). The drive rod (4) abuts against the guide surface (324). An elastic element (321) is provided on the gear body (1). The elastic element (321) abuts against the mounting part (32), causing the mounting part (32) to have a tendency to move out of the oil groove (12), and causing the drive rod (4) to have a tendency to move into the tooth groove of the tooth surface (11).

7. A bevel gear for a photovoltaic tracking gearbox according to claim 6, characterized in that: The drive rod (4) includes a rod portion (41) and a ball (42). The ball (42) is rotatably connected to the rod portion (41). The rod portion (41) abuts against the guide surface (324). The elastic element (321) is connected to the rod portion (41) so that the ball (42) extends into the tooth groove of the tooth surface (11).

8. A bevel gear for a photovoltaic tracking gearbox according to claim 6, characterized in that: The oil-absorbing pad (2) is elastic, and the oil-absorbing pad (2) presses against the thermal expansion and contraction part (31) so that the thermal expansion and contraction part (31) presses against the guide surface (323).

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