Reversing fan base body structure adapting to different hydraulic pressures

Abstract

The utility model relates to the technical field of cooling fans, in particular to a reversing fan base body structure suitable for different hydraulic pressures, which comprises a cylinder body, a piston and a reset spring. The cylinder body is provided with a middle boss and an outer boss, and an annular cavity is formed in the radial outer side of the outer boss; the piston comprises a middle roundabout and an outer roundabout, the middle boss is sleeved with the middle roundabout, the outer boss is sleeved with the outer roundabout, sealing rings are arranged on the inner wall of the outer roundabout and the outer wall of the outer boss, the end face of the middle roundabout is closed, and a first hydraulic cavity is formed between the end face of the middle roundabout and the end face of the middle boss. A second hydraulic cavity is formed between the inner end face of the outer roundabout and the end face of the outer boss; one end of the reset spring is connected to the outer side of the middle roundabout in a sleeving mode and abuts against the outer end face of the outer roundabout. The reversing fan structure can adapt to vehicles with different hydraulic pressures.

Description

Technical Field

[0001] The utility model relates to the technical field of heat dissipation fans, in particular to a reversing fan base structure adaptable to different hydraulic pressures. Background Art

[0002] The heat dissipation of the engine cooling system is mainly achieved by directly or indirectly driving the cooling fan through the engine crankshaft to remove the heat. Conventional fans can only suck or blow air, mainly to achieve the heat dissipation function of the engine cooling water tank. At present, agricultural machinery and some special work vehicles are easily affected by the external environment when working. For example, when the fan is working for heat dissipation, long-term air suction will cause objects in the environment to be adsorbed on the water tank body, reducing the cooling efficiency of the cooling fan to the water tank. In severe cases, it may cause the engine to overheat or even stop working.

[0003] The prior art discloses a multi-angle reversing fan device, which realizes the output of air volume in both positive and negative directions when the fan is rotating by adjusting the deflection angle of the fan blades. This structure realizes the reversal and resetting of the fan by the cooperation of hydraulic pressure and spring force, so it is required that the hydraulic pressure matches the elastic force of the spring. If the hydraulic pressure of the agricultural vehicle is smaller than the elastic force of the spring, it will lead to the inability to overcome the elastic force of the spring and adjust the fan angle. If the hydraulic pressure of the agricultural vehicle is too large relative to the elastic force of the spring, and the oil cannot be discharged to the external environment like air pressure after the pressure is released, there will be residual pressure, which will cause the fan angle to be unable to be reset normally. Utility Model Content

[0004] In view of the deficiencies in the prior art, the purpose of the embodiments of the utility model is to provide a reversing fan base structure that can adapt to different hydraulic pressures, so that the reversing fan structure can adapt to vehicles with different hydraulic pressures, especially vehicles with lower hydraulic pressures, without the need for a separate boosting device.

[0005] In order to achieve the above purpose, the embodiment of the utility model provides the following technical solutions:

[0006] A reversing fan base structure adaptable to different hydraulic pressures comprises: a cylinder body, a piston and a reset spring; the cylinder body comprises a middle protrusion and an outer protrusion, the outer protrusion is located radially outside the middle protrusion, and an annular cavity is arranged radially outside the outer protrusion; the piston comprises a middle ring island and an outer ring island, the middle ring island is sleeved on the outside of the middle protrusion, the outer ring island is sleeved on the outside of the outer protrusion, and the outer ring island is embedded in the annular cavity, a sealing ring is arranged on the inner wall of the outer ring island and the outer wall of the outer protrusion, the end face of the middle ring island is closed, a first hydraulic cavity is formed between the end face of the middle ring island and the end face of the middle protrusion, and a second hydraulic cavity is formed between the inner end face of the outer ring island and the end face of the outer protrusion; the reset spring comprises a plurality of springs of equal length arranged in a nested manner, one end of the spring is sleeved on the outside of the middle ring island and abuts against the outer end face of the outer ring island.

[0007] Optionally, an annular groove is provided on the inner wall of the outer ring island of the piston, and a sealing ring is installed in the annular groove.

[0008] Optionally, an annular groove is provided on the outer wall of the outer protrusion of the cylinder body, and a sealing ring is installed in the annular groove.

[0009] Optionally, the reversing fan base structure further includes a blade fixing component, wherein the blade fixing component includes a blade shaft, an inner end of the blade shaft is provided with an eccentrically arranged positioning pin, and the positioning pin is mounted on an outer ring island of the piston.

[0010] Optionally, a floating block is sleeved on the positioning pin, and the floating block can rotate relative to the positioning pin.

[0011] Optionally, an oil inlet channel is provided at the center position of the cylinder body, the oil inlet channel is communicated with the first hydraulic chamber, the first hydraulic chamber is communicated with the second hydraulic chamber, and an oil inlet component is provided in the oil inlet channel.

[0012] Optionally, the reversing fan base structure further includes a connecting disk, which is mounted on the opposite side of the cylinder body, and one end of the return spring abuts against the connecting disk, and the other end abuts against the piston.

[0013] The utility model embodiment also provides a reversing fan base structure that can adapt to different hydraulic pressures, including: a cylinder body, a piston and a return spring; the cylinder body has a middle protrusion and an outer protrusion, the outer protrusion is located radially outside the middle protrusion, and an annular cavity is arranged radially outside the outer protrusion; the piston includes a middle ring island and an outer ring island, the middle ring island is sleeved on the outside of the middle protrusion, the outer ring island is sleeved on the outside of the outer protrusion, and the outer ring island is embedded in the annular cavity, a sealing ring is arranged on the outer wall of the outer ring island and the outer wall of the annular cavity, the end face of the middle ring island is closed, a first hydraulic cavity is formed between the end face of the middle ring island and the end face of the middle protrusion, a second hydraulic cavity is formed between the inner end face of the outer ring island and the end face of the outer protrusion, and a third hydraulic cavity is formed between the outer end face of the outer ring island and the end face of the annular cavity; the return spring includes a plurality of springs of equal length arranged in a nested manner, one end of the spring is sleeved on the outside of the middle ring island and abuts against the outer end face of the outer ring island.

[0014] Optionally, an annular groove is provided on the outer wall of the piston outer ring island, and a sealing ring is provided in the annular groove.

[0015] Optionally, an annular groove is provided on the outer wall of the annular cavity of the cylinder body, and a sealing ring is provided in the annular groove.

[0016] One or more technical solutions provided in the embodiments of the present utility model have at least the following technical effects or advantages:

[0017] The reversing fan base divides the hydraulic chamber into two. According to different hydraulic pressures, cylinders with different outer protrusion diameters can be selected to adjust the size of the radial section of the second hydraulic chamber, thereby meeting the requirements of vehicles with different pressure configurations, reducing the difficulty of matching, and ensuring the realization of normal functions. This selection only adjusts the diameter of the outer protrusion and the outer ring island, does not involve external dimensions, does not affect the assembly relationship of other positions, is more convenient to use, has lower costs, and has better reliability. At the same time, multiple nested springs are used to shorten the length of the spring and make it located on the outer end surface of the piston outer ring island, that is, it will not be embedded in the annular cavity of the cylinder after extension, and does not affect the selection of the outer ring island diameter. In the case of limited space in the length direction of the spring installation, multiple spring collars are used for installation, which can reduce the compression ratio of the spring, meet the reset function of the spring, improve the stability of the spring during compression and reset, reduce the spring deflection, and reduce the reduction of the spring's elastic force after long-term reciprocating compression, effectively improving the service life of the product.

[0018] Additional advantages of the present invention will be given in the following description, and some will become apparent from the following description or will be understood through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The drawings in the specification, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention.

[0020] Figure 1 This is a schematic diagram of the structure of the reversing fan base provided in Example 1 of the utility model;

[0021] Figure 2 This is a schematic diagram of the adjusted base structure of the reversing fan provided in Example 1 of the utility model;

[0022] Figure 3 This is another schematic diagram of sealing ring installation provided in Example 1 of the utility model;

[0023] Figure 4 It is a schematic diagram of a fan blade fixing component provided in Example 1 of the utility model;

[0024] Figure 5 This is a schematic diagram of the structure of the reversing fan base provided in Example 2 of the utility model;

[0025] Figure 6 This is a schematic diagram of the adjusted base structure of the reversing fan provided in Example 2 of the utility model;

[0026] Figure 7 This is another schematic diagram of sealing ring installation provided in Example 2 of the utility model;

[0027] In the figure: 1, fan blade fixing component; 2, piston; 3, sealing ring; 4, cylinder body; 5, oil inlet component; 6, return spring; 7, connecting plate; 8, first hydraulic chamber; 9, second hydraulic chamber; 10, third hydraulic chamber; 101, fan blade shaft; 102, bearing; 103, positioning pin; 104, floating block; 201, middle ring island; 202, outer ring island; 401, middle protrusion; 402, outer protrusion;

[0028] In order to show the positions of various parts, the distances or sizes between them are exaggerated and the schematic diagram is for reference only. DETAILED DESCRIPTION

[0029] It should be noted that the following detailed descriptions are all illustrative and are intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used in the present invention have the same meanings as those commonly understood by those skilled in the art to which the present invention belongs.

[0030] like Figure 1 As shown, in one embodiment of the utility model, a reversing fan base structure adapted to different hydraulic pressures is proposed, including: a cylinder body 4, a piston 2 and a return spring 6; the cylinder body 4 has a middle protrusion 401 and an outer protrusion 402, the outer protrusion 402 is located radially outside the middle protrusion 401, and an annular cavity is arranged radially outside the outer protrusion 402; the piston 2 includes a middle ring island 201 and an outer ring island 202, the middle ring island 201 is sleeved on the outside of the middle protrusion 401, the outer ring island 202 is sleeved on the outside of the outer protrusion 402, and the outer ring island 202 is embedded in the annular cavity. Figure 2 As shown, the inner wall of the outer island 202 and the outer wall of the outer protrusion 402 are provided with a sealing ring 3, the end face of the middle island 201 is closed, a first hydraulic chamber 8 is formed between the end face of the middle island 201 and the end face of the middle protrusion 401, a second hydraulic chamber 9 is formed between the inner end face of the outer island 202 and the end face of the outer protrusion 402, and the second hydraulic chamber 9 is connected to the first hydraulic chamber 8. The reset spring 6 includes a plurality of springs of equal length arranged in a nested manner, one end of which is sleeved on the outer side of the middle island 201 and against the outer end face of the outer island 202.

[0031] There are few air sources on the current agricultural vehicles on the market, but most of them have hydraulic sources. However, the pressure of the hydraulic sources varies from vehicle to vehicle. If the hydraulic pressure is too low, it cannot overcome the spring force to adjust the fan angle. On the other hand, when resetting, it is necessary to ensure that the pressure is completely removed. However, there will be residual pressure after the hydraulic devices on most agricultural machines are depressurized. If the hydraulic pressure of the vehicle is too high, the residual pressure will also be relatively high. The residual pressure will cause the normal reset to fail.

[0032] In the existing reversing fan base structure, there is only one hydraulic chamber, the spring is relatively long, and the stretched spring is embedded in the annular chamber of the cylinder body 4. Therefore, this structure cannot be adjusted according to the hydraulic pressure of different vehicles and has poor adaptability.

[0033] The reversing fan base divides the hydraulic chamber into two, and can select cylinder bodies 4 with different outer protrusion 402 diameters for different hydraulic pressures to adjust the size of the radial cross-section of the second hydraulic chamber 9, thereby meeting the requirements of vehicles with different pressure configurations, reducing the difficulty of matching, and ensuring the realization of normal functions. This selection only adjusts the diameter of the outer protrusion 402 and the outer island 202, does not involve external dimensions, does not affect the assembly relationship of other positions, is more convenient to use, has lower costs, and has better reliability.

[0034] At the same time, multiple nested springs are used to shorten the length of the springs and place them on the outer end surface of the outer ring island 202 of the piston 2, that is, they will not be embedded in the annular cavity of the cylinder body 4 after being stretched, and will not affect the selection of the diameter of the outer ring island 202. In the case of limited space in the length direction of the spring installation, multiple spring collars are used for installation to reduce the compression ratio of the spring, which not only meets the reset function of the spring, but also improves the stability of the spring during the compression and reset process, reduces the spring deflection, and can also reduce the reduction in the elastic force of the spring after long-term reciprocating compression, effectively improving the service life of the product.

[0035] When the cylinder body 4 , the piston 2 and the sealing ring 3 together form two hydraulic chambers, the sealing ring 3 can be located in the annular groove of the inner diameter of the piston 2 , or in the annular groove of the cylinder body 4 .

[0036] Specifically, Figure 1 As shown, the inner wall of the outer ring island 202 of the piston 2 is provided with an annular groove, and a sealing ring 3 is installed in the annular groove. Figure 3 As shown, the outer wall of the outer protrusion 402 of the cylinder body 4 is provided with an annular groove, and the sealing ring 3 is installed in the annular groove. During the fan adjustment process, the piston 2 moves axially relative to the cylinder body 4, and the sealing ring 3 is located in the annular groove of the piston 2 (or the cylinder body 4), and moves with the movement of the piston 2 (or the cylinder body 4). During the installation of the sealing ring 3, the lip of the sealing ring 3 can be easily compressed, which is easy to install and does not cause extrusion damage to the lip of the sealing ring 3.

[0037] The reversing fan base structure also includes a blade fixing component 1, such as Figure 4 As shown, the fan blade fixing component 1 includes a fan blade shaft 101, a bearing 102 is installed on the fan blade shaft 101, and an eccentrically arranged positioning pin 103 is provided at the inner end of the fan blade shaft 101, and the positioning pin 103 is installed on the outer ring island 202 of the piston 2. A floating block 104 is sleeved on the positioning pin 103, and the floating block 104 can rotate relative to the positioning pin 103.

[0038] The fan blade fixing component 1 includes an eccentric positioning pin 103 arranged around the axis of the fan blade shaft 101, and the eccentric positioning pin 103 is positioned and installed on the piston 2 through a floating block 104. When the hydraulic pressure pushes the piston 2 to move axially in the direction of the compression return spring 6, the floating block 104 will move axially with the piston 2, and can also slide on the installation plane of the piston 2, thereby driving the positioning pin 103 to rotate around the axis of the fan blade shaft 101.

[0039] like Figure 1 As shown, an oil inlet channel is arranged at the center position of the cylinder body 4, and the oil inlet channel is connected with the first hydraulic chamber 8, and the first hydraulic chamber 8 is connected with the second hydraulic chamber 9. An oil inlet component 5 is arranged in the oil inlet channel, and the oil inlet component 5 can adopt the existing structure, and this embodiment is not limited.

[0040] like Figure 1 As shown, the reversing fan base structure also includes a connecting plate 7, which is installed on the opposite side of the cylinder body 4. One end of the reset spring 6 abuts against the connecting plate 7, and the other end abuts against the piston 2. The reset spring 6 is composed of a plurality of springs. In order to meet the installation boundary and the normal reset of the fan after adjustment, this structure preferably uses a combination of two reset springs 6, and the two reset springs 6 act between the connecting plate 7 and the piston 2. When the original structure is reset after the blade angle is adjusted, the oil inlet component 5 reduces or removes the pressure, and the piston 2 performs a reset movement under the action of the reset spring 6.

[0041] Adjustment process:

[0042] When the fan blades need to be adjusted, the oil inlet component 5 inputs a certain pressure into the two connected hydraulic chambers, and the pressure pushes the piston 2 to move axially in the direction of the compression return spring 6. The floating block 104 will move axially with the piston 2, and can also slide on the installation plane of the piston 2, thereby driving the positioning pin 103 to rotate around the axis of the fan blade shaft 101, thereby meeting the purpose of adjusting the fan blade angle. Multiple fan blade shafts 101 components are installed in a reversing fan, and the number can be arranged 3-10 according to the use requirements.

[0043] Example 2

[0044] The difference between this embodiment and embodiment 1 is that the sealing ring 3 is arranged at a different position. Figure 5As shown, the reversing fan base structure includes: a cylinder body 4, a piston 2 and a reset spring 6; the cylinder body 4 has a middle protrusion 401 and an outer protrusion 402, the outer protrusion 402 is located radially outside the middle protrusion 401, and an annular cavity is arranged radially outside the outer protrusion 402; the piston 2 includes a middle ring island 201 and an outer ring island 202, the middle ring island 201 is sleeved on the outside of the middle protrusion 401, the outer ring island 202 is sleeved on the outside of the outer protrusion 402, and the outer ring island 202 is embedded in the annular cavity, the outer ring island The outer wall of 202 and the outer wall of the annular cavity are provided with a sealing ring 3, the end face of the middle island 201 is closed, a first hydraulic cavity 8 is formed between the end face of the middle island 201 and the end face of the middle protrusion 401, a second hydraulic cavity 9 is formed between the inner end face of the outer island 202 and the end face of the outer protrusion 402, and a third hydraulic cavity 10 is formed between the outer end face of the outer island 202 and the end face of the annular cavity; the reset spring 6 includes a plurality of springs of equal length arranged in a nested manner, one end of the spring is sleeved on the outside of the middle island 201 and against the outer end face of the outer island 202. Figure 6 As shown, when the pressure does not meet the use requirements, three interconnected hydraulic chambers are used to meet the pressure requirements.

[0045] like Figure 5 As shown, an annular groove is provided on the outer wall of the outer ring island 202 of the piston 2, and a sealing ring 3 is provided in the annular groove. Figure 7 As shown, an annular groove is arranged on the outer wall of the annular cavity of the cylinder body 4, and a sealing ring 3 is arranged in the annular groove.

[0046] During the fan adjustment process, the piston 2 moves axially relative to the cylinder body 4. The sealing ring 3 is located in the annular groove of the piston 2 (or the cylinder body 4) and moves with the movement of the piston 2 (or the cylinder body 4). During the installation of the sealing ring 3, the lip of the sealing ring 3 can be easily compressed, which is easy to install without causing extrusion damage to the lip of the sealing ring 3.

[0047] Although the above describes the specific implementation methods of the utility model in conjunction with the accompanying drawings, it is not intended to limit the protection scope of the utility model. Technical personnel in the relevant field should understand that on the basis of the technical solution of the utility model, various modifications or deformations that can be made by technical personnel in this field without creative work are still within the protection scope of the utility model.

Claims

1. A reversing fan base structure adapted to different hydraulic pressures, characterized in that: include: Cylinder, piston and return spring; The cylinder body has a middle protrusion and an outer protrusion, the outer protrusion is located radially outside the middle protrusion, and an annular cavity is arranged radially outside the outer protrusion; The piston comprises a middle ring island and an outer ring island, the middle ring island is sleeved on the outside of the middle protrusion, the outer ring island is sleeved on the outside of the outer protrusion, and the outer ring island is embedded in the annular cavity, the inner wall of the outer ring island and the outer wall of the outer protrusion are provided with a sealing ring, the end face of the middle ring island is closed, a first hydraulic cavity is formed between the end face of the middle ring island and the end face of the middle protrusion, and a second hydraulic cavity is formed between the inner end face of the outer ring island and the end face of the outer protrusion; The return spring comprises a plurality of springs of equal length which are arranged in a nested manner, one end of the spring being sleeved on the outside of the middle ring island and resting against the outer end surface of the outer ring island.

2. The reversing fan base structure adapted to different hydraulic pressures according to claim 1 is characterized in that: The inner wall of the outer ring island of the piston is provided with an annular groove, and a sealing ring is installed in the annular groove.

3. The reversing fan base structure adapted to different hydraulic pressures according to claim 1, characterized in that: The outer wall of the outer protrusion of the cylinder body is provided with an annular groove, and a sealing ring is installed in the annular groove.

4. The reversing fan base structure adapted to different hydraulic pressures according to claim 1 is characterized in that: The reversing fan base structure also includes a blade fixing component, which includes a blade shaft. An eccentrically arranged positioning pin is provided at the inner end of the blade shaft, and the positioning pin is installed on the outer ring island of the piston.

5. The reversing fan base structure adapted to different hydraulic pressures according to claim 4, characterized in that: A floating block is sleeved on the positioning pin, and the floating block can rotate relative to the positioning pin.

6. The reversing fan base structure adapted to different hydraulic pressures according to claim 1, characterized in that: An oil inlet passage is arranged at the center of the cylinder body, the oil inlet passage is communicated with the first hydraulic chamber, the first hydraulic chamber is communicated with the second hydraulic chamber, and an oil inlet component is arranged in the oil inlet passage.

7. The reversing fan base structure adapted to different hydraulic pressures according to claim 1, characterized in that: The reversing fan base structure also includes a connecting disk, which is installed on the opposite side of the cylinder body. One end of the return spring abuts against the connecting disk, and the other end abuts against the piston.

8. A reversing fan base structure adapted to different hydraulic pressures, characterized in that: include: Cylinder, piston and return spring; The cylinder body has a middle protrusion and an outer protrusion, the outer protrusion is located radially outside the middle protrusion, and an annular cavity is arranged radially outside the outer protrusion; The piston comprises a middle ring island and an outer ring island, the middle ring island is sleeved on the outside of the middle protrusion, the outer ring island is sleeved on the outside of the outer protrusion, and the outer ring island is embedded in the annular cavity, the outer wall of the outer ring island and the outer wall of the annular cavity are provided with a sealing ring, the end face of the middle ring island is closed, a first hydraulic cavity is formed between the end face of the middle ring island and the end face of the middle protrusion, a second hydraulic cavity is formed between the inner end face of the outer ring island and the end face of the outer protrusion, and a third hydraulic cavity is formed between the outer end face of the outer ring island and the end face of the annular cavity; The return spring comprises a plurality of springs of equal length which are arranged in a nested manner, one end of the spring being sleeved on the outside of the middle ring island and resting against the outer end surface of the outer ring island.

9. The reversing fan base structure adapted to different hydraulic pressures according to claim 8, characterized in that: An annular groove is arranged on the outer wall of the piston outer ring island, and a sealing ring is arranged in the annular groove.

10. The reversing fan base structure adapted to different hydraulic pressures according to claim 8, characterized in that: An annular groove is arranged on the outer wall of the annular cavity of the cylinder body, and a sealing ring is arranged in the annular groove.

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