Reversing fan capable of improving reverse blowing amount and vehicle

Abstract

The utility model relates to the technical field of reversing fans, in particular to a reversing fan capable of improving the reverse blowing amount and a vehicle. The reversing fan comprises a fan blade base body, a fan blade body and a wind protection ring, the inner diameter of the fan blade body is installed on the fan blade base body, the fan blade body is located in the wind protection ring, and in the axial direction of the fan, part of the fan blade body is located on the outer side of the wind protection ring, and part of the fan blade body is located on the inner side of the wind protection ring; a transition plate is arranged on the outer diameter of the fan blade body, the length of the transition plate is smaller than that of the outer diameter of the fan blade body in the circumferential direction of the fan blade body, the transition plate is located on the outer side of the axial direction of the fan protection ring before reversing, and the transition plate is located on the inner side of the axial direction of the fan protection ring after reversing. By means of the reversing fan, the air volume and efficiency in a reverse blowing mode are improved, and the more thorough impurity removal effect is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of reversing fans, in particular to a reversing fan and a vehicle for increasing the amount of back-blowing air. Background Art

[0002] In the field of engine cooling technology, the cooling fan is a key component, and its performance directly affects the cooling efficiency and service life of the engine. The cooling fan is usually installed on the engine and driven by the crankshaft to extract heat from the engine. A wind shield is installed outside the fan. In order to ensure that the fan does not interfere with the wind shield under various operating conditions, a certain safety gap is set between the wind shield and the outer diameter of the fan blade.

[0003] In the current prior art, there is a reversing fan that changes the wind direction by changing the angle of the fan blades. Before reversing, the fan is in a conventional heat dissipation mode, and after reversing, the purpose of blowing air in the reverse direction to remove impurities is achieved. In order to meet sufficient heat dissipation requirements, the fan blades are mostly designed with a structural shape that is conducive to the heat dissipation mode. However, after reversing, the reversing fan is affected by the shape of the fan blades, and the reverse blowing air volume of the reversing fan will be greatly reduced. There is a common situation of small reverse blowing air volume, low efficiency, and incomplete reverse blowing to remove impurities. 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 with increased back-blowing air volume, so as to increase the air volume and efficiency of the reversing fan in the back-blowing mode and achieve a more thorough impurity removal effect.

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

[0006] A reversing fan for increasing the amount of backblowing air comprises: a blade base, a blade body and a wind protection ring, wherein the inner diameter of the blade body is mounted on the blade base, and the blade body is located inside the wind protection ring, and along the axial direction of the fan, part of the blade body is located outside the wind protection ring, and part is located inside the wind protection ring; a transition plate is provided on the outer diameter of the blade body, and along the circumferential direction of the blade body, the length of the transition plate is smaller than the length at the outer diameter of the blade body, before reversing, the transition plate is located outside the wind protection ring in the axial direction, and after reversing, the transition plate is located inside the wind protection ring in the axial direction.

[0007] Optionally, the transition plate is made of flexible material.

[0008] Optionally, the transition plate and the fan blade body are integrally formed.

[0009] Optionally, the transition plate is fixed to the blade body by gluing.

[0010] Optionally, the transition plate is detachably connected to the blade body.

[0011] Optionally, the transition plate is fixed to the blade body by screws or rivets.

[0012] Optionally, the transition plate is connected to the fan blade body by a snap-fit ​​structure.

[0013] Optionally, an outer clamping portion is provided on the outer diameter of the fan blade body, and the outer clamping portion is Z-shaped. The Z-shaped outer clamping portion forms a first clamping groove located on the end face and a second clamping groove located on the radial outside. A bending portion is provided on the inner diameter of the transition plate, and the bending portion is clamped in the first clamping groove. An inner clamping portion is provided on the back side of the transition plate, and the inner clamping portion is L-shaped. The L-shaped inner clamping portion is clamped in the second clamping groove.

[0014] Optionally, along the circumferential direction, the length of the first slot is smaller than the length of the blade body, and both ends of the first slot in the circumferential direction are not open, and the length of the bent portion of the transition plate along the circumferential direction is smaller than the length of the transition plate body.

[0015] An embodiment of the utility model further provides a vehicle, comprising the reversing fan for increasing the amount of back-blowing air as described above.

[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] By setting the transition plate, the gap between the blades and the wind shield is reduced after the reversing of the reversing fan, thereby reducing air leakage. The shape of the transition plate is almost close to the shape of the blade edge, so the transition plate is equivalent to the extension of the blade part. Compared with the prior art, the reverse blowing air volume and fan efficiency of the reversing fan are greatly improved, and the reverse blowing and impurity removal effect is more thorough. In addition, the circumferential length of the transition plate is smaller than the circumferential length of the blade body, that is, the transition plate only occupies a part of the blade body. In the heat dissipation mode, that is, before reversing, the transition plate is located outside the wind shield, and in the reverse blowing mode, that is, after reversing, the transition plate is located inside the wind shield, which not only solves the problem of insufficient reversing blowing, but also avoids excessive power consumption increase in the heat dissipation mode, and can also reduce excessive wear of the transition plate.

[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 1It is a schematic diagram of the positional relationship between the transition plate and the wind shielding ring after the reversing provided by the embodiment of the utility model;

[0021] Figure 2 It is a schematic diagram of the positional relationship between the front transition plate and the wind protection ring provided by the embodiment of the utility model;

[0022] Figure 3 It is a schematic diagram of the relative positions of the fan blade body and the transition plate provided by the embodiment of the utility model;

[0023] Figure 4 This is a schematic diagram of the installation of the transition plate provided by the embodiment of the utility model through screws or rivets;

[0024] Figure 5 It is a cross-sectional view of a transition plate provided by an embodiment of the utility model connected by a buckle;

[0025] Figure 6 It is a front view of a transition plate provided by an embodiment of the utility model connected by a buckle;

[0026] In the figure: 1, wind protection ring; 2, transition plate; 21, inner clamping part; 22, bending part; 3, fan blade body; 31, outer clamping part; 4, fan blade base; 5, screws or rivets;

[0027] 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

[0028] It should be noted that the following detailed descriptions are 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 of ordinary skill in the art to which the present invention belongs. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or combinations thereof.

[0029] As introduced in the background technology, the heat dissipation fan in the prior art mainly comprises a fan base, a blade body and a wind shield. The blade body is driven to rotate by a crankshaft to generate airflow to achieve heat dissipation. The wind shield is installed on the periphery of the fan and maintains a certain safety gap with the blade body to avoid interference under various working conditions. However, when the reversing fan is performing a reversing operation, since the blade shape design is mainly aimed at the heat dissipation mode, the backblowing air volume is reduced after reversing, the efficiency is reduced, and the impurity removal effect is not thorough. In order to solve the above technical problems, the utility model proposes a reversing fan with increased backblowing air volume.

[0030] The present embodiment mainly improves the outer diameter of the blade body 3, and other parts such as the blade base 4 and the wind protection ring 1 are all existing technologies. The inner diameter of the blade body 3 is installed on the blade base 4, and the blade body 3 is located in the wind protection ring 1. The blade base 4 can drive the blade body 3 to change direction, which is forward heat dissipation before changing direction and reverse impurity removal after changing direction.

[0031] like Figure 1 , Figure 2 As shown, along the axial direction of the fan, part of the blade body 3 is located outside the wind protection ring 1, and part is located inside the wind protection ring 1. The outer diameter of the blade body 3 is provided with a transition plate 2, and along the circumferential direction of the blade body 3, the length of the transition plate 2 is less than the length at the outer diameter of the blade body 3, as shown in FIG. Figure 3 As shown, the transition plate 2 is shorter than the fan blade body 3. Before the reversing, the transition plate 2 is located on the axial outer side of the wind protection ring 1 (as shown in FIG. Figure 2 As shown), after the reversal, the transition plate 2 is located on the axial inner side of the wind protection ring 1 (as shown Figure 1 As shown), that is, the transition plate 2 is located at an end away from the wind protection ring 1 before the fan is reversed, and after the fan is reversed, the transition plate 2 enters the wind protection ring 1 as the fan blade body 3 changes angle.

[0032] By setting the transition plate 2, the gap between the fan blade and the wind protection ring 1 is reduced after the reversing fan is reversed, thereby reducing air leakage. The shape of the transition plate 2 is almost close to the shape of the fan blade edge, so the transition plate 2 is equivalent to the extension of the fan blade part. Compared with the prior art, the reverse air volume and fan efficiency of the reversing fan are greatly improved, and the reverse blowing and impurity removal effect is more thorough.

[0033] In normal heat dissipation mode (fan blowing forward), affected by the wind volume and wind pressure, the fan blade body 3 will produce radial deformation within the allowable range, while when the reversing fan is reverse blowing after reversing, the wind volume and wind pressure are relatively small, and the deformation of the fan blade body 3 is also relatively small. In normal heat dissipation mode, the fan wind volume meets the use requirements, so the circumferential length of the transition plate 2 is smaller than the circumferential length of the fan blade body 3, that is, the transition plate 2 only occupies a part of the fan blade body 3. In the heat dissipation mode, the transition plate 2 is located outside the wind protection ring 1 before reversing, and in the reverse blowing mode, the transition plate 2 is located inside the wind protection ring 1 after reversing, which not only solves the problem of insufficient reversing blowing, but also avoids excessive power consumption increase in the heat dissipation mode, and can also reduce excessive wear of the transition plate 2.

[0034] The transition plate 2 is made of a flexible material (such as rubber) with good elasticity and wear resistance. After the reversing fan is reversing, a small safety gap can be set between the transition plate 2 and the wind shield 1, or no gap can be set. During operation, the transition plate 2 of the reversing fan is prone to deformation and wear, which can avoid rigid impact with the wind shield 1, so that it will eventually perfectly match with the wind shield 1.

[0035] The transition plate 2 is integrally formed with the fan blade body 3. For example, the fan blade body 3 and the transition plate 2 can be fixed together using a process such as injection molding or vulcanization, and the mold is directly formed. Through integral molding, there is no seam between the transition plate 2 and the fan blade body 3, and the integrity is stronger, and there will be no performance degradation caused by loosening of the fixing method. This method not only improves the overall strength of the fan, but also simplifies the manufacturing process and reduces production costs.

[0036] In another embodiment, the transition plate 2 is fixed to the fan blade body 3 by gluing. The gluing fixing method is simple, and the transition plate 2 and the fan blade body 3 are tightly fitted after gluing. This fixing method simplifies the assembly process while ensuring performance.

[0037] In another embodiment, the transition plate 2 is detachably connected to the fan blade body 3. This connection method is flexible in design and is convenient for the user to replace or repair the transition plate 2 when necessary, thereby extending the service life of the fan.

[0038] Specifically, the fan blade body 3 can be fixed by screws or rivets 5 (such as Figure 4 As shown, screws or rivets 5 as a fixing method have high strength and reliability and are suitable for use under high-intensity working conditions. A snap-fit ​​structure can also be used for connection. The snap-fit ​​structure is set at the outer edge of the fan blade body 3. The transition plate 2 and the fan blade body 3 are tightly matched, and the installation is convenient and quick.

[0039] Specific as Figure 5 As shown, the outer diameter of the blade body 3 is provided with an outer clamping portion 31, and the outer clamping portion 31 is Z-shaped. The Z-shaped outer clamping portion 31 is formed on the end surface (i.e. Figure 5 The first slot on the upper middle side and the first slot on the radial outer side (i.e. Figure 5 The inner diameter of the transition plate 2 is provided with a bending portion 22, which is bent downward and clamped in the first slot. The back side of the transition plate 2 (i.e. Figure 5 An inner clamping portion 21 is provided on the middle bottom side, and the inner clamping portion 21 is L-shaped. The L-shaped inner clamping portion 21 is clamped in the second clamping slot.

[0040] The Z-shaped outer clamping portion 31 of the blade body 3 forms two clamping grooves, and the bending portion 22 and the inner clamping portion 21 of the transition plate 2 form anti-dropping clamping claws, wherein the outer clamping portion 31, the bending portion 22 and the inner clamping portion 21 can be directly formed by a mold. During installation, the bending portion 22 is clamped in the first clamping groove, and the inner clamping portion 21 is clamped in the second clamping groove. After installation, the structure is reliable and stable, and can prevent falling off. In addition, the mold molding structure is simple, the production cost is low, and the assembly processability is good.

[0041] Further, such as Figure 6As shown, along the circumferential direction, the length of the first slot is less than the length of the blade body 3, and both ends of the first slot in the circumferential direction are not opened, that is, the blade body 3 material is left at both ends of the first slot, and the length of the bending portion 22 of the transition plate 2 along the circumferential direction is less than the length of the transition plate 2 body. This design can prevent the transition plate 2 from sliding in the circumferential direction, and effectively control the position of the transition plate 2 when it is clamped, avoid loosening or displacement, and improve the stability of the connection and the overall performance of the fan.

[0042] In the reversing fan, two or more blade bodies 3 and transition plates 2 are combined and evenly arranged on the reversing fan base.

[0043] Based on the above reversing fan, the embodiment of the utility model also provides a vehicle suitable for road and non-road vehicles, such as cars, trucks, engineering vehicles, etc. Using the fan in the engine cooling system of these vehicles can significantly improve the heat dissipation efficiency and the back-blowing and impurity removal effect.

[0044] 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 for increasing the amount of back-blowing air, characterized in that: include: A blade base, a blade body and a wind protection ring, wherein the inner diameter of the blade body is mounted on the blade base, and the blade body is located in the wind protection ring, and along the axial direction of the fan, part of the blade body is located outside the wind protection ring, and part of the blade body is located inside the wind protection ring; A transition plate is provided on the outer diameter of the blade body. Along the circumferential direction of the blade body, the length of the transition plate is smaller than the length of the outer diameter of the blade body. Before reversing, the transition plate is located on the axial outside of the wind protection ring, and after reversing, the transition plate is located on the axial inside of the wind protection ring.

2. The reversing fan for increasing the back-blowing volume according to claim 1, characterized in that: The transition plate is made of flexible material.

3. The reversing fan for increasing the back-blowing volume according to claim 1, characterized in that: The transition plate and the fan blade body are integrally formed.

4. The reversing fan for increasing the back-blowing volume according to claim 1, characterized in that: The transition plate is fixed on the fan blade body by gluing.

5. The reversing fan for increasing the back-blowing volume according to claim 1, characterized in that: The transition plate is detachably connected to the fan blade body.

6. The reversing fan for increasing the back-blowing volume according to claim 5, characterized in that: The transition plate is fixed to the fan blade body by screws or rivets.

7. The reversing fan for increasing the back-blowing volume according to claim 5, characterized in that: The transition plate is connected to the fan blade body by a snap-fit ​​structure.

8. The reversing fan for increasing the back-blowing volume according to claim 7, characterized in that: An outer clamping portion is provided on the outer diameter of the fan blade body, and the outer clamping portion is Z-shaped. The Z-shaped outer clamping portion forms a first clamping groove located on the end face and a second clamping groove located on the radial outside. A bending portion is provided on the inner diameter of the transition plate, and the bending portion is clamped in the first clamping groove. An inner clamping portion is provided on the back side of the transition plate, and the inner clamping portion is L-shaped. The L-shaped inner clamping portion is clamped in the second clamping groove.

9. The reversing fan for increasing the back-blowing volume according to claim 8, characterized in that: Along the circumferential direction, the length of the first slot is smaller than the length of the blade body, and both ends of the first slot in the circumferential direction are not open, and the length of the bending portion of the transition plate along the circumferential direction is smaller than the length of the transition plate body.

10. A vehicle, characterized in that: It comprises a reversing fan for increasing the back-blowing air volume as described in any one of claims 1-9.

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