Reverse rotation cooling fan

Abstract

The invention discloses a reverse rotation cooling fan, and belongs to the technical field of cooling fans, the reverse rotation cooling fan comprises a fan main body, a brake device is mounted on the fan main body, the fan main body comprises a motor, a fan shaft is fixed on an output shaft of the motor, a fan head is mounted on the fan shaft, and the brake device is used for tightly holding the fan shaft. A cleaning assembly used for cleaning dust on the fan head is fixed to the brake device. According to the cooling fan, by arranging the brake device, when the motor stops rotating, the two clamping blocks can be controlled to be close to each other to lock the fan shaft, the fan is prevented from rotating reversely when stopping, the phenomenon of overcurrent can be avoided when the fan is started, the fan does not need to be started after manual stable stopping, and meanwhile the service life of the fan is prolonged; by arranging the detachable brake device, the fan can be conveniently installed on other produced fan bodies for use, by arranging the limiting assembly, the fan head can be replaced when the fan shaft is locked, and a nut is limited when the fan body runs.

Description

Technical Field

[0001] The invention belongs to the technical field of cooling fans, and in particular relates to a counter-rotating cooling fan. Background Art

[0002] Cooling circulating water is required in industry. This equipment includes cooling fans, which are common auxiliary equipment in industry. Common cooling water towers have 2 or more cooling fans.

[0003] Due to airflow reasons, the standby cooling fan often reverses, causing overcurrent when the standby cooling fan is started. Personnel are required to stop the cooling fan on site before starting it, which wastes manpower. When the overcurrent phenomenon is serious, the motor may burn out. To solve the above problem, a reverse rotating cooling fan is now provided.

[0004] It should be noted that the above contents belong to the technical knowledge of the inventor and do not necessarily constitute prior art. Summary of the invention

[0005] In order to solve the above problems, the purpose of the present invention is to provide a reverse-rotation cooling fan. By setting a brake device, when the motor stops, the two clamps can be controlled to approach each other to lock the fan shaft, thereby preventing the fan from reversing when it stops, and avoiding overcurrent when the fan starts. There is no need to manually stop the fan and then restart it, which saves manpower and increases the service life of the fan. By setting a detachable brake device, it can be conveniently installed on other produced fan bodies for use, without the need to produce the cooling fan as a whole, thereby reducing production costs.

[0006] To achieve the above-mentioned purpose, the present invention proposes a cooling fan comprising a fan body, a brake device is installed on the fan body, the fan body comprises a motor, a fan shaft is fixed on the output shaft of the motor, a fan head is installed on the fan shaft, the brake device is used to hold the fan shaft tightly, and a cleaning component for cleaning dust on the fan head is fixed on the brake device.

[0007] The brake device comprises a mounting sleeve, one end of which is recessed, and clamping arms are fixed on both sides of the mounting sleeve.

[0008] The clamping arm includes a first connecting plate fixed on the mounting sleeve, a first electric telescopic rod is vertically fixed to a side of the first connecting plate close to the recess, a second electric telescopic rod is vertically fixed to an output shaft of the first electric telescopic rod, and an arc-shaped clamping block is fixed to the output shaft of the second electric telescopic rod.

[0009] A pressing plate is also fixed on the output shaft of the first electric telescopic rod on one of the clamping arms, and the cleaning component is fixed on the other clamping arm.

[0010] Furthermore, the fan head includes a shaft sleeve, which is sleeved on the fan shaft, and a plurality of fan blades are fixed around the shaft sleeve.

[0011] Furthermore, the fan body also includes a fixing component for fixing the fan head.

[0012] Furthermore, the fan shaft is fixed with a limit ring, and the fixing assembly includes a washer, the washer and the limit ring are respectively located at both ends of the sleeve, and a nut for locking the fan head is installed at the end of the fan shaft away from the motor, and the nut is threadedly connected to the fan shaft.

[0013] Furthermore, a limiting component for limiting the position of the fixing component is installed in the fan shaft.

[0014] Furthermore, the inner wall of the nut is provided with limiting grooves distributed in a circumferential array.

[0015] Slide grooves are provided on both sides of the fan shaft, and a mounting groove communicating with the outside is provided on the side of the slide groove away from the motor.

[0016] The limit assembly includes a connecting strip arranged in the installation groove, a sliding shaft is vertically fixed at one end of the connecting strip, and a limit block is fixed at the other end. The sliding shaft slides in the sliding groove, and a plurality of springs are fixedly connected between the connecting strip and the installation groove.

[0017] Furthermore, the cleaning assembly includes an L-shaped connecting plate fixed on the second electric telescopic rod in the corresponding clamp arm, one end of the pressure plate is provided with a slot for inserting the fan shaft, a sliding rod is slidably provided on the L-shaped connecting plate, the sliding rod is parallel to the first electric telescopic rod, a limiting plate is fixed at one end of the sliding rod, and a connecting rod is fixed at the other end, and a brush head is fixed on the connecting rod.

[0018] Furthermore, bristles are provided on both sides of the brush head close to the L-shaped connecting plate and away from the L-shaped connecting plate.

[0019] The counter-rotating cooling fan proposed by the present invention can bring the following beneficial effects:

[0020] 1. The cooling fan of the present invention can control the two clamps to approach each other and lock the fan shaft when the motor stops by setting a brake device, so as to prevent the fan from reversing when it stops, and avoid overcurrent when the fan starts. There is no need to manually stop the fan and then restart it, which saves manpower and prolongs the service life of the fan.

[0021] 2. The cooling fan of the present invention is provided with a detachable brake device, so that it can be conveniently installed on other fan bodies that have been produced for use, without the need to produce the entire cooling fan, thereby reducing production costs;

[0022] 3. The cooling fan of the present invention is provided with a limit assembly, so that the fan head can be replaced when the fan shaft is locked, and the nut can be limited when the fan body is running, so as to prevent the nut from loosening or even falling off during the operation of the fan body, thereby affecting the normal operation of the cooling fan;

[0023] 4. The cooling fan of the present invention fixes the cleaning assembly on one of the clamping arms, and can adjust the position of the cleaning assembly by moving the air clamping arm, thereby cleaning the surfaces of both sides of the fan blades. There is no need to manually clean the dust on the surface of the fan blades, which reduces the difficulty of cleaning the fan blades. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0025] Figure 1 This is a schematic structural diagram of the counter-rotating cooling fan of the present invention from a first viewing angle.

[0026] Figure 2 It is a schematic cross-sectional structure diagram of the counter-rotating cooling fan of the present invention.

[0027] Figure 3 for Figure 2 Enlarged structural diagram at A in the middle.

[0028] Figure 4 This is a schematic structural diagram of the counter-rotating cooling fan of the present invention from a second viewing angle.

[0029] In the figure: 1. motor; 2. fan head; 3. fixing assembly; 4. limiting assembly; 5. brake device; 6. cleaning assembly; 11. limiting ring; 12. slide groove; 13. mounting groove; 21. bushing; 22. fan blade; 31. washer; 32. nut; 33. limiting groove; 41. connecting strip; 42. limiting block; 43. sliding shaft; 45. spring; 51. mounting sleeve; 52. first connecting plate; 53. first electric telescopic rod; 54. second electric telescopic rod; 55. clamping block; 56. pressure plate; 61. connecting plate; 62. sliding rod; 63. limiting piece; 64. connecting rod; 65. brush head. DETAILED DESCRIPTION

[0030] In order to more clearly illustrate the overall concept of the present invention, a detailed description is given below in an exemplary manner in conjunction with the accompanying drawings.

[0031] In the description of the present invention, it is necessary to understand that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0032] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0033] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or a communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0034] In the present invention, unless otherwise clearly specified and limited, the first feature "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. In the description of this specification, the description with reference to the terms "one scheme", "some schemes", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the scheme or example are included in at least one scheme or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same scheme or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more schemes or examples in a suitable manner.

[0035] An embodiment of the present invention provides a counter-rotating cooling fan, the cooling fan comprising a fan body, such as Figure 1As shown, a brake device 5 is installed on the fan body, and the fan body includes a motor 1. A fan shaft is fixed on the output shaft of the motor 1, and a fan head 2 is installed on the fan shaft. The brake device 5 is used to hold the fan shaft tightly. The fan body also includes a fixing component 3 for fixing the fan head 2, and a limiting component 4 for limiting the fixing component 3 is installed in the fan shaft. A cleaning component 6 for cleaning dust on the fan head 2 is fixed on the brake device 5.

[0036] The upper fixed limit ring 11 of the fan shaft, such as Figure 2 As shown, both sides of the fan shaft are provided with slide grooves 12, and the side of the slide groove 12 away from the motor 1 is provided with a mounting groove 13 connected to the outside. The fan head 2 includes a sleeve 21, which is mounted on the fan shaft, and a plurality of fan blades 22 are fixed around the sleeve 21.

[0037] The fixing assembly 3 includes a washer 31, such as Figure 3 As shown, the washer 31 and the limit ring 11 are respectively located at the two ends of the sleeve 21, and a nut 32 for locking the fan head 2 is installed at the end of the fan shaft away from the motor 1. The nut 32 is threadedly connected to the fan shaft, and the inner wall of the nut 32 is provided with limit grooves 33 distributed in a circumferential array.

[0038] The limiting assembly 4 includes a connecting strip 41 arranged in the mounting groove 13, a sliding shaft 43 is vertically fixed at one end of the connecting strip 41, and a limiting block 42 is fixed at the other end. The sliding shaft 43 slides in the sliding groove 12, and a plurality of springs 45 are fixedly connected between the connecting strip 41 and the mounting groove 13. In the natural state of the spring 45, one end of the sliding shaft 43 is located outside, and at the same time, the limiting block 42 is inserted into the corresponding limiting groove 33 to limit the nut 32.

[0039] The brake device 5 includes a mounting sleeve 51, such as Figure 4 As shown, one end of the installation sleeve 51 is recessed, and clamping arms are fixed on both sides of the installation sleeve 51.

[0040] The clamping arm includes a first connecting plate 52 fixed on the mounting sleeve 51, a first electric telescopic rod 53 is vertically fixed to the side of the first connecting plate 52 close to the recess, a second electric telescopic rod 54 is vertically fixed to the output shaft of the first electric telescopic rod 53, and an arc-shaped clamping block 55 is fixed to the output shaft of the second electric telescopic rod 54.

[0041] A pressing plate 56 is also fixed on the output shaft of the first electric telescopic rod 53 on one of the clamping arms, and the cleaning assembly 6 is fixed on the other clamping arm.

[0042] The cleaning assembly 6 includes an L-shaped connecting plate 61 fixed on the second electric telescopic rod 54 in the corresponding clamping arm, one end of the pressure plate 56 is provided with a slot for inserting the fan shaft, a sliding rod 62 is slidably provided on the L-shaped connecting plate 61, the sliding rod 62 is parallel to the first electric telescopic rod 53, one end of the sliding rod 62 is fixed with a limiting plate 63, and the other end is fixed with a connecting rod 64, a brush head 65 is fixed on the connecting rod 64, and bristles are provided on both sides of the brush head 65 close to the L-shaped connecting plate 61 and away from the L-shaped connecting plate 61.

[0043] The extension and retraction of the second electric telescopic rod 54 is interlocked with the power supply of the motor 1. After the motor 1 loses power, it is set that after 10-20 seconds, the second electric telescopic rod 54 extends to control the two clamping blocks 55 to approach each other and lock the fan shaft.

[0044] When in use, the brake device 5 is installed by putting the concave surface of the mounting sleeve 51 on the bottom of the motor 1 and controlling the pressure plate 56 to press on the top of the motor 1 by contracting the first electric telescopic rod 53. At this time, the two clamping blocks 55 correspond to the two sliding shafts 43 respectively. By starting the second electric telescopic rod 54, the two clamping blocks 55 are controlled to approach each other to lock the fan shaft to prevent the fan from reversing when it stops. At the same time, the sliding shaft 43 is pressed to move the limit block 42 out of the limit groove 33. The fan head 2 can be replaced by removing the nut 32.

[0045] When the fan blades 22 need to be cleaned, the first electric telescopic rod 53 and the second electric telescopic rod 54 on the corresponding clamping arm can cooperate to control the brush head 65 to move to contact the upper surface or the lower surface. By starting the second electric telescopic rod 54, the brush head 65 is controlled to move to clean the surface of the fan blade 22. By starting the motor 1, another fan blade 22 is rotated to correspond to the brush head 65, and then its surface is cleaned until all the fan blades 22 are cleaned.

[0046] Each embodiment in this specification is described in a progressive manner, and the same or similar parts between the embodiments can be referred to each other, and each embodiment focuses on the differences from other embodiments. In particular, for the system embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and the relevant parts can be referred to the partial description of the method embodiment.

[0047] The above description is only an embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent substitution, improvement, etc. made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.

Claims

1. A counter-rotating cooling fan, the cooling fan comprising a fan body, characterized in that: The fan body is provided with a brake device (5), the fan body comprises a motor (1), a fan shaft is fixed on the output shaft of the motor (1), a fan head (2) is installed on the fan shaft, the brake device (5) is used to hold the fan shaft tightly, and a cleaning component (6) for cleaning dust on the fan head (2) is fixed on the brake device (5); The brake device (5) comprises a mounting sleeve (51), one end of the mounting sleeve (51) is recessed, and clamping arms are fixed on both sides of the mounting sleeve (51); The clamping arm comprises a first connecting plate (52) fixed on the mounting sleeve (51); a first electric telescopic rod (53) is vertically fixed to a side of the first connecting plate (52) close to the recess; a second electric telescopic rod (54) is vertically fixed to an output shaft of the first electric telescopic rod (53); and an arc-shaped clamping block (55) is fixed to the output shaft of the second electric telescopic rod (54); A pressing plate (56) is also fixed on the output shaft of the first electric telescopic rod (53) on one of the clamping arms, and a cleaning assembly (6) is fixed on the other clamping arm.

2. The counter-rotating cooling fan according to claim 1, characterized in that: The fan head (2) comprises a shaft sleeve (21), the shaft sleeve (21) is sleeved on the fan shaft, and a plurality of fan blades (22) are fixed around the shaft sleeve (21).

3. The counter-rotating cooling fan according to claim 2, characterized in that: The fan body also includes a fixing assembly (3) for fixing the fan head (2).

4. The counter-rotating cooling fan according to claim 3, characterized in that: The fan shaft is fixed with a limit ring (11), the fixing assembly (3) comprises a washer (31), the washer (31) and the limit ring (11) are respectively located at two ends of the shaft sleeve (21), and a nut (32) for locking the fan head (2) is installed at one end of the fan shaft away from the motor (1), and the nut (32) is threadedly connected to the fan shaft.

5. The counter-rotating cooling fan according to claim 4, characterized in that: A limiting component (4) for limiting the position of the fixing component (3) is installed in the fan shaft.

6. The counter-rotating cooling fan according to claim 5, characterized in that: The inner wall of the nut (32) is provided with limiting grooves (33) distributed in a circumferential array; Both sides of the fan shaft are provided with a slide groove (12), and a mounting groove (13) communicating with the outside is provided on the side of the slide groove (12) away from the motor (1); The limit assembly (4) comprises a connecting strip (41) arranged in the mounting groove (13); a sliding shaft (43) is vertically fixed at one end of the connecting strip (41); a limit block (42) is fixed at the other end; the sliding shaft (43) is located in the sliding groove (12) and slides; and a plurality of springs (45) are fixedly connected between the connecting strip (41) and the mounting groove (13).

7. The counter-rotating cooling fan according to claim 6, characterized in that: The cleaning assembly (6) comprises an L-shaped connecting plate (61) fixed on the second electric telescopic rod (54) in the corresponding clamping arm, one end of the pressing plate (56) is provided with a slot for receiving the fan shaft, a sliding rod (62) is slidably provided on the L-shaped connecting plate (61), the sliding rod (62) is parallel to the first electric telescopic rod (53), one end of the sliding rod (62) is fixed with a limiting plate (63), the other end is fixed with a connecting rod (64), and a brush head (65) is fixed on the connecting rod (64).

8. The counter-rotating cooling fan according to claim 7, characterized in that: The brush head (65) is provided with bristles on both sides close to the L-shaped connecting plate (61) and away from the L-shaped connecting plate (61).

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