Air blower

Abstract

The utility model relates to the technical field of air blowers, and discloses an air blower which comprises an air blower body and a motor assembly connected to one side of the air blower body, the motor assembly comprises a motor body and a motor shell, a motor shaft is arranged on the motor body, and one end, away from the air blower body, of the motor shaft is connected with a fan. The motor body and the fan are both arranged in the motor shell, the motor shell is provided with a heat dissipation air outlet corresponding to the fan, one side, close to the motor body, of the fan is provided with a guide column in a protruding mode, the guide column is provided with an inserting groove used for being connected with a motor shaft in an inserting mode, and the motor body is provided with an avoiding groove corresponding to the motor shaft. According to the air blower, the guide columns are arranged, so that the fan and the motor shaft are installed stably, shaking is not prone to occurring, and noise is low; one end of the guide column is arranged on the inner side of the receding groove of the motor body, and a part of the guide column is embedded in the motor body, so that the axial occupied space of the fan is small, the axial thickness of the motor body is reduced, and the overall size of the air blower is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of air blower, specifically, an air blower. BACKGROUND

[0002] The air blower mainly consists of the following six parts: motor, air filter, air blower body, air chamber, base (also oil tank), oil nozzle (part of which does not have an oil nozzle). The air blower relies on the eccentric rotation of the rotor biased in the cylinder, and the volume between the blades in the rotor groove changes to suck, compress and expel air.

[0003] Some existing air blowers, the motor includes a motor body and a motor shell, the motor body is placed in the motor shell, a fan for heat dissipation is connected to the motor shaft, the fan is placed in the motor shell, due to the large thickness of the fan shaft, the volume of the motor shell is large, thus the volume of the air blower is large, which cannot meet the use requirement of small volume air blower, and is not suitable for some narrow space. Some existing air blowers, the motor shaft and the fan are not stable, which can easily cause the fan to shake when rotating, resulting in poor heat dissipation effect of the fan and generating a large noise, and the use experience is poor; in addition, some existing air blowers are provided with a circuit board for controlling the rotation of the motor, which does not have the function of dissipating heat for the circuit board, so that the circuit board is easily overheated and damaged, and the service life is short. SUMMARY

[0004] To solve at least one of the above problems, the utility model provides an air blower, which comprises: an air blower body and a motor assembly connected to one side of the air blower body, the motor assembly comprises a motor body and a motor shell, the motor body is provided with a motor shaft, one end of the motor shaft away from the air blower body is connected with a fan, the motor body and the fan are both placed in the motor shell, the motor shell is provided with a heat dissipation air outlet corresponding to the fan, one side of the fan close to the motor body is provided with a guide column, the guide column is provided with a plug-in slot for plugging with the motor shaft, the motor body is provided with an avoidance slot corresponding to the motor shaft, the motor shaft penetrates through the avoidance slot, and one end of the guide column is placed inside the avoidance slot; the air blower of the utility model is provided with a guide column, so that the fan and the motor shaft are stable and not easy to shake, and the noise is small; one end of the guide column is placed inside the avoidance slot of the motor body, and part of the guide column is embedded in the motor body, so that the axial space occupied by the fan is small, so as to reduce the axial thickness of the motor body, thereby reducing the volume of the air blower as a whole.

[0005] Optionally, the plug-in slot is a through slot.

[0006] Optionally, the guide column is a circular guide column, the insertion slot is a circular slot, and the fan is disc-shaped, and the fan, the guide column and the insertion slot are coaxially arranged.

[0007] Optionally, the motor body comprises a stator, a first mounting bracket and a second mounting bracket, the first mounting bracket and the second mounting bracket are respectively connected to two sides of the stator, the avoiding slot is arranged on the first mounting bracket, and the second mounting bracket is connected with the motor shell.

[0008] Optionally, the first mounting bracket is provided with an annular protrusion on a side close to the fan, and the avoiding slot is a circular through slot, and the annular protrusion and the avoiding slot are coaxially arranged.

[0009] Optionally, the guide column is annularly provided with a first guide slope at an end close to the motor body.

[0010] Optionally, the motor shaft is provided with a second guide slope at an end away from the blower body.

[0011] Optionally, the fan comprises a fan disc, an axial length of the fan disc is a first length, an axial length of the guide column is a second length, the first length is 0.8-1.2 times the second length, the fan disc is provided with an annular first reinforcing rib close to the motor body and a second reinforcing rib extending in a radial direction, the first reinforcing rib is concentrically provided with a plurality of first reinforcing ribs, and the second reinforcing rib is annularly and equidistantly provided with a plurality of second reinforcing ribs.

[0012] Optionally, the motor shell is provided with a circuit control board, the circuit control board is electrically connected with the motor body through wires, the circuit control board is connected with an interface terminal exposed to the motor shell, the motor shell comprises a main shell and a bottom cover connected with each other, the bottom cover is connected with the blower body, and a ventilation opening is arranged between the main shell and the bottom cover, and the ventilation opening is used for connecting an inner cavity of the main shell with the outside.

[0013] Optionally, the blower body is provided with an air inlet and an air outlet, the blower body is provided with an impeller, the motor body comprises a rotor, the motor shaft comprises a first motor shaft and a second motor shaft connected to two sides of the rotor respectively, one end of the first motor shaft away from the rotor is connected with the fan, and one end of the second motor shaft away from the rotor is connected with the impeller.

[0014] Relative to the prior art, the blower fan in the utility model is provided with guide columns, so that the fan and the motor shaft are installed stably and are not prone to shaking and have low noise; one end of the guide column is placed inside the avoiding groove of the motor body, and a part of the guide column is embedded in the motor body, so that the axial space occupied by the fan is small, so as to reduce the axial thickness of the motor body, thereby reducing the overall volume of the blower fan; the guide column is used to increase the contact area between the motor shaft and the inner groove wall of the plug-in groove, so that the fan and the motor shaft are connected stably; the plug-in groove is tightly plugged with the motor shaft, so that the motor shaft and the fan rotate synchronously; the motor shaft can drive the fan to rotate when rotating, so as to achieve the heat dissipation effect of the motor, so that the motor is not prone to overheating and has a long service life; the plug-in groove is a through groove, so that the upper end surface of the motor shaft can be flush with or slightly higher than the upper groove opening of the plug-in groove after the fan is installed, so that the contact area between the motor shaft and the inner groove wall of the plug-in groove is large, and the installation is more stable; the end of the guide column close to the motor body is annularly provided with a first guide slope, so as to guide the guide column into the avoiding groove, reduce the assembly difficulty of the fan, and improve the assembly speed; the end of the motor shaft away from the blower fan body is provided with a second guide slope, so as to guide the motor shaft into the plug-in groove, reduce the assembly difficulty of the fan, and improve the assembly speed; the fan and the impeller are driven to rotate by the motor shaft at the same time, the motor and the circuit control board are cooled at the same time of outputting the wind force, and the service life is increased. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is a perspective view of the blower fan of the utility model;

[0016] Figure 2 It is a sectional view of the blower fan of the utility model;

[0017] Figure 3 It is Figure 2 It is an enlarged view of A part in the middle;

[0018] Figure 4 It is a structural schematic view of the bottom of the blower fan of the utility model;

[0019] Figure 5 It is a structural schematic view of the circuit control board of the blower fan of the utility model;

[0020] Figure 6 It is a structural schematic view of the fan of the blower fan of the utility model;

[0021] The component names corresponding to the various labels in the figure are as follows: 1 is the blower body, 11 is the air inlet, 12 is the air outlet, 2 is the motor body, 201 is the clearance groove, 202 is the stator, 203 is the first mounting bracket, 204 is the second mounting bracket, 205 is the annular protrusion, 21 is the motor shaft, 211 is the second guide slope, 212 is the first motor shaft, 213 is the second motor shaft, 22 is the fan, 221 is the fan disc, 2211 is the first reinforcing rib, 2211 and 2212 are the second reinforcing ribs, 23 is the guide post, 231 is the first guide slope, 24 is the insertion slot, 3 is the motor housing, 31 is the heat dissipation outlet, 32 is the main housing, 33 is the bottom cover, 34 is the ventilation port, 4 is the circuit control board, 5 is the wire, 6 is the impeller, 7 is the rotor, L is the first length, and M is the second length. Detailed Implementation

[0022] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0023] In the description of this utility model, it should be understood that the terms "upper" and "lower" indicate the orientation or positional relationship based on the orientation or positional relationship when the product is in normal use.

[0024] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature.

[0025] See Figures 1-6This utility model provides a blower, including: a blower body 1 and a motor assembly connected to one side of the blower body 1. The motor assembly includes a motor body 2 and a motor housing 3. A motor shaft 21 is provided on the motor body 2, and a fan 22 is connected to the end of the motor shaft 21 away from the blower body 1. Both the motor body 2 and the fan 22 are placed inside the motor housing 3. A heat dissipation vent 31 corresponding to the fan 22 is provided on the motor housing 3. When the fan 22 rotates, it drives the air inside the motor housing 3 to be discharged to the outside through the heat dissipation vent 31 to achieve a heat dissipation effect. A guide post 23 is protruding on the side of the fan 22 near the motor body 2. The guide post 23 is provided with a insertion groove 24 for inserting into the motor shaft 21. The guide post 23 increases the contact between the motor shaft 21 and the inner wall of the insertion groove 24. The area ensures a stable connection between the fan 22 and the motor shaft 21; the insertion slot 24 is tightly fitted to the motor shaft 21 so that the motor shaft 21 and the fan 22 rotate synchronously. When the motor shaft rotates, it can drive the fan 22 to rotate, achieving a heat dissipation effect on the motor, making the motor less prone to overheating and extending its service life; the motor body 2 is provided with a relief slot 201 corresponding to the motor shaft 21, through which the motor shaft 21 passes, and one end of the guide post 23 is placed inside the relief slot 201; the blower of this utility model is provided with a guide post, which makes the fan and motor shaft installed stably, less prone to shaking, and with low noise; placing one end of the guide post inside the relief slot of the motor body and embedding part of the guide post into the motor body makes the axial space occupied by the fan small, so as to reduce the axial thickness of the motor body and thus reduce the overall volume of the blower.

[0026] See Figure 1 , Figure 2 , Figure 3 and Figure 6 The insertion slot 24 is a through slot, so that the upper end face of the motor shaft 21 can be flush with or slightly higher than the upper opening of the insertion slot 24 after the fan is installed, so that the contact area between the motor shaft 21 and the inner wall of the insertion slot 24 is larger and the installation is more stable; the guide post 23 is a circular guide post, the insertion slot 24 is a circular slot, and the fan 22 is disc-shaped. The fan 22, the guide post 23 and the insertion slot 24 are coaxially arranged, so that the fan rotates smoothly; the motor body 2 includes a stator 202, a first mounting bracket 203 and a second mounting bracket 204. The first mounting bracket 203 and the second mounting bracket 204 are respectively fixedly connected to the upper and lower sides of the stator 202 by tight fitting or other means. The clearance slot 201 is provided on the first mounting bracket 203. The second mounting bracket 204 is fixedly connected to the motor housing 3 by bolts. The structure is simple and the assembly is convenient.

[0027] See Figures 1-3The first mounting bracket 203 has an annular protrusion 205 on the side near the fan 22, and the clearance groove 201 is a circular through groove. The annular protrusion 205 and the clearance groove 201 are coaxially arranged. When the fan rotates, it will wobble slightly. The annular protrusion 205 can increase the axial length of the clearance groove 201 to increase the limiting effect on the guide post 23, and limit the wobbling amplitude of the guide post 23 and the fan as a whole to be less than large, so that the fan rotates more smoothly. The fan is made of aluminum, which is lightweight and high-strength, and has good temperature resistance. The fan can also be made of high-temperature resistant plastic. The end of the guide post 23 near the motor body 2 has a first guide slope 231, so that the guide post 23 can be guided into the clearance groove 201, reducing the assembly difficulty of the fan and increasing the assembly speed. The end of the motor shaft 21 away from the blower body 1 has a second guide slope 211, so that the motor shaft can be guided into the insertion groove 24, reducing the assembly difficulty of the fan and increasing the assembly speed.

[0028] See Figure 2 , Figure 3 and Figure 6 The fan 22 includes a fan disk 221, the axial length of which is a first length L, and the axial length of the guide post 23 is a second length M. The first length L is 0.8 to 1.2 times the second length M. In this embodiment, the first length L and the second length M are equal. The axial length of the guide post 23 is moderate and the structural design is reasonable. The length of the guide post 23 should not be set too small to avoid insufficient connection stability. The length of the guide post 23 should also not be set too large to avoid wasting materials and increasing manufacturing costs. The fan disk 221 is integrally provided with an annular first reinforcing rib 2211 and a radially extending second reinforcing rib 2212 on the side near the motor body 2 to increase structural strength and make the fan less prone to deformation and damage. Multiple first reinforcing ribs 2211 are concentrically arranged. In this embodiment, three first reinforcing ribs 2211 are provided. Multiple second reinforcing ribs 2212 are arranged annularly at equal intervals to increase structural strength.

[0029] See Figure 1 , Figure 2 and Figure 5The motor housing 3 houses a circuit control board 4, which is electrically connected to the motor body 2 via wires 5. The circuit control board 4 has an exposed interface terminal 41 connected to the motor housing 3, allowing connection to an external control system to control the motor body's switching, speed, etc. The motor housing 3 includes a main housing 32 and a bottom cover 33 connected together. The bottom cover 33 is connected to the blower body 1. A ventilation opening 34 is provided between the main housing 32 and the bottom cover 33, connecting the inner cavity of the main housing 32 to the outside. When the motor body is operating, the fan rotates, allowing outside air to enter the inner cavity of the motor housing 3 through the ventilation opening 34, thus dissipating heat from the motor body and the circuit control board 4 inside the motor housing 3. This prevents overheating and increases the service life of the motor body and the circuit control board 4. The design cleverly utilizes a single fan to simultaneously dissipate heat from both the motor body and the circuit control board 4.

[0030] See Figure 1 , Figure 2 and Figure 5 The blower body 1 is provided with an air inlet 11 and an air outlet 12, and the air is output through the air outlet 12. The blower body 1 is provided with an impeller 6. The motor body 2 includes a rotor 7. The motor shaft 21 includes a first motor shaft 212 and a second motor shaft 213, which are fixedly connected to the upper and lower sides of the rotor 7 by welding, integral connection or other means. The end of the first motor shaft 212 away from the rotor 7 is connected to the fan 22, and the end of the second motor shaft 213 away from the rotor 7 is connected to the impeller 6. The motor shaft drives the fan and the impeller 6 to rotate at the same time, and while outputting air, it also dissipates heat from the motor and the circuit control board 4, thereby increasing the service life.

[0031] The blower of this invention is equipped with guide posts, which ensures a stable installation of the fan and motor shaft, preventing wobbling and reducing noise. One end of the guide post is placed inside the clearance groove of the motor body, and a portion of the guide post is embedded in the motor body, minimizing the axial space occupied by the fan and reducing the axial thickness of the motor body, thereby reducing the overall size of the blower. The guide posts increase the contact area between the motor shaft and the inner wall of the insertion groove, ensuring a stable connection between the fan and the motor shaft. The insertion groove is tightly fitted to the motor shaft, allowing the motor shaft and fan to rotate synchronously. When the motor shaft rotates, it drives the fan to rotate, achieving a cooling effect on the motor, preventing overheating and extending its service life. The insertion slot is a through slot, allowing the upper surface of the motor shaft to be flush with or slightly higher than the upper opening of the insertion slot after fan installation. This results in a larger contact area between the motor shaft and the inner wall of the insertion slot, making the installation more stable. The guide post has a first guide ramp at the end closest to the motor body, facilitating its insertion into the clearance slot and reducing assembly difficulty while increasing assembly speed. The end of the motor shaft furthest from the blower body has a second guide ramp, again facilitating its insertion into the insertion slot and reducing assembly difficulty while increasing assembly speed. The motor shaft simultaneously drives the fan and impeller to rotate, providing cooling to the motor and circuit control board while outputting airflow, thus extending their service life.

[0032] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A blower, comprising: A blower body (1) and a motor assembly connected to one side of the blower body (1), the motor assembly including a motor body (2) and a motor housing (3), the motor body (2) having a motor shaft (21), characterized in that a fan (22) is connected to the end of the motor shaft (21) away from the blower body (1), the motor body (2) and the fan (22) are both placed inside the motor housing (3), and the motor housing (3) is provided with a connection to the fan (22). 22) Corresponding heat dissipation vent (31), the fan (22) has a protruding guide post (23) on one side near the motor body (2), the guide post (23) has a plug slot (24) for plugging into the motor shaft (21), the motor body (2) has a relief groove (201) corresponding to the motor shaft (21), the motor shaft (21) passes through the relief groove (201), and one end of the guide post (23) is placed inside the relief groove (201).

2. The blower according to claim 1, characterized in that, The insertion slot (24) is a through slot.

3. The blower according to claim 1, characterized in that, The guide post (23) is a circular guide post, the insertion slot (24) is a circular slot, the fan (22) is a disc, and the fan (22), the guide post (23) and the insertion slot (24) are coaxially arranged.

4. The blower according to claim 1, characterized in that, The motor body (2) includes a stator (202), a first mounting bracket (203) and a second mounting bracket (204). The first mounting bracket (203) and the second mounting bracket (204) are respectively connected to both sides of the stator (202). The clearance groove (201) is provided on the first mounting bracket (203). The second mounting bracket (204) is connected to the motor housing (3).

5. The blower according to claim 4, characterized in that, The first mounting bracket (203) has an annular protrusion (205) on the side near the fan (22), and the clearance groove (201) is a circular through groove. The annular protrusion (205) and the clearance groove (201) are coaxially arranged.

6. The blower according to claim 1, characterized in that, The guide post (23) has a first guide slope (231) arranged in a ring at one end near the motor body (2).

7. The blower according to claim 1, characterized in that, The motor shaft (21) is provided with a second guide slope (211) at the end away from the blower body (1).

8. The blower according to claim 1, characterized in that, The fan (22) includes a fan disk (221), the axial length of which is a first length (L), and the axial length of the guide post (23) is a second length (M). The first length (L) is 0.8 to 1.2 times the second length (M). The fan disk (221) is provided with an annular first reinforcing rib (2211) and a radially extending second reinforcing rib (2212) on the side near the motor body (2). Multiple first reinforcing ribs (2211) are concentrically arranged, and multiple second reinforcing ribs (2212) are annularly arranged at equal intervals.

9. The blower according to claim 1, characterized in that, A circuit control board (4) is provided inside the motor housing (3). The circuit control board (4) is electrically connected to the motor body (2) via a wire (5). An interface terminal (41) exposed outside the motor housing (3) is connected to the circuit control board (4). The motor housing (3) includes a main housing (32) and a bottom cover (33) connected to each other. The bottom cover (33) is connected to the blower body (1). A vent (34) is provided between the main housing (32) and the bottom cover (33). The vent (34) is used to connect the inner cavity of the main housing (32) with the outside.

10. The blower according to any one of claims 1-9, characterized in that, The blower body (1) is provided with an air inlet (11) and an air outlet (12). An impeller (6) is provided inside the blower body (1). The motor body (2) includes a rotor (7). The motor shaft (21) includes a first motor shaft (212) and a second motor shaft (213) respectively connected to both sides of the rotor (7). The end of the first motor shaft (212) away from the rotor (7) is connected to the fan (22). The end of the second motor shaft (213) away from the rotor (7) is connected to the impeller (6).

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