A new type of motor shaft with speed increasing fan

Abstract

The utility model relates to motor manufacturing technical field, concretely disclose a kind of shaft of novel motor is increased speed fan, including motor shaft, transmission device, fan, the outside of the motor shaft is rotatably connected with heat dissipation shell by first bearing, the fan is installed in the outside of heat dissipation shell by transmission device, the transmission device is drivingly connected with motor shaft, two layers of gear sets are equipped in transmission device, two layers of gear sets are drivingly connected with fan after reducing torque and increasing speed by changing speed ratio. The scheme uses motor self power, improves fan speed after reducing torque and increasing speed, increases the heat dissipation effect of heat dissipation fan without improving motor speed. In the scheme, the overall compact total weight is lighter than other ordinary speed reduction mechanism, effectively improves motor forced air cooling heat dissipation efficiency, controls motor overall temperature, simultaneously without affecting the speed of bearing external output.

Description

Technical Field

[0001] This utility model relates to the field of motor manufacturing technology, and in particular to a novel motor shaft-driven speed-increasing fan. Background Technology

[0002] Motors rely on fans mounted at the rear end to rotate coaxially with the shaft for heat dissipation. However, existing motors, whether DC or AC, will overheat at low speeds due to insufficient fan airflow. Furthermore, when the motor shaft outputs high torque, the fan speed decreases, which also directly leads to overheating. Utility Model Content

[0003] The purpose of this invention is to provide a new type of motor shaft-driven speed-increasing fan to solve the problems encountered in the background art.

[0004] To achieve the above objectives, the technical solution of this utility model is as follows: A novel motor shaft-driven speed-increasing fan includes a motor shaft, a transmission device, and a fan. A heat dissipation shell is rotatably connected to the outer side of the motor shaft via a first bearing. The fan is mounted on the outer side of the heat dissipation shell via the transmission device. The transmission device is driven by the motor shaft. The transmission device has two gear sets, which are driven by the fan after changing the speed ratio to reduce torque and increase speed.

[0005] In the above scheme, the active drive side of the first gear set of the transmission device is fixedly connected to the motor shaft, the passive drive gear of the first gear set is fixedly connected to one side gear of the second gear set of the transmission device, the other side gear of the second gear set of the transmission device is rotatably connected to the motor shaft through the second bearing, and the top of the other side gear of the second gear set is fixedly connected to the fan.

[0006] In the above scheme, the first gear set of the transmission device includes a first gear and a second gear, and the second gear set of the transmission device includes a third gear and a fourth gear; the first gear is coaxially fixed on the motor shaft, the second gear is fixed on the connecting plate of the heat sink shell through the gear shaft, the second gear meshes with the first gear, the third gear is coaxially fixed on the top of the second gear, the gear ratio of the third gear is greater than the gear ratio of the second gear, the third gear meshes with the fourth gear, the fourth gear is coaxially and rotatably connected to the motor shaft through the second bearing, and the top of the fourth gear is fixedly connected to the fan.

[0007] In the above scheme, the fan is fixedly connected to the top of the fourth gear via a connecting frame, and heat dissipation fins are provided on the outer periphery of the fan. The top of the fourth gear is fixedly connected to the root of the connecting frame via fixing screws, and the outer end of the connecting frame is fixedly connected to the fan via threaded holes and screws. A positioning buckle with a concave-convex structure is provided at the connection between the connecting frame and the fan. Insertion blocks are provided on both sides of the top of the second gear, and insertion holes are provided on both sides of the third gear. The third gear is fixed to the top of the second gear by the cooperation of the insertion blocks and insertion holes.

[0008] In the above scheme, the gear shaft is rotatably connected to the second gear and the third gear via a third bearing. Weight reduction grooves are provided on the connecting frame and the connecting plate; the heat dissipation fins have arc-shaped blade structures.

[0009] In the above scheme, a bearing sleeve is rotatably connected to the outer side of the motor shaft via a first bearing. The top of the bearing sleeve is provided with a bearing cover, and the outer periphery of the bearing sleeve is fixedly connected to the heat dissipation shell via a connecting plate. As a preferred embodiment, the outer surface of the heat dissipation shell is provided with multiple layers of uniform heat dissipation fins, with adjacent layers of heat dissipation fins staggered; a locking head is provided at the top of the motor shaft.

[0010] Compared with existing technologies, the advantages of this invention are as follows: The fan is mounted on the outside of the heat dissipation casing via a transmission device, which is connected to the motor shaft. The transmission device contains two gear sets, which are connected to the fan after changing their speed ratio to reduce torque and increase speed. By using the motor's own power and increasing the speed through torque reduction, the cooling effect of the cooling fan is enhanced without increasing the motor's speed. In this design, the overall structure is compact and lighter than other ordinary reduction mechanisms, effectively improving the forced air cooling efficiency of the motor, controlling the overall motor temperature, and without affecting the bearing's output speed to the outside. Attached Figure Description

[0011] The disclosure of this utility model is illustrated with reference to the accompanying drawings. It should be understood that the drawings are for illustrative purposes only and are not intended to limit the scope of protection of this utility model. In the drawings, the same reference numerals are used to refer to the same parts. Wherein: Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a half-sectional schematic diagram of the present invention; Figure 3 This is a half-sectional view of the present invention from another perspective; Figure 4 for Figure 3 A partial enlarged view of the transmission device; Figure 5 This is a half-sectional schematic diagram of the transmission device in this utility model; Figure 6 This is a schematic diagram of the installation of the transmission device on the motor shaft in this utility model; Figure 7 This is a schematic diagram of the installation structure of the second and third gears in this utility model.

[0012] Numbering in the diagram: 1-Motor shaft; 11-Locking head; 12-First bearing; 13-Bearing cover; 14-Bearing sleeve; 15-Heat sink housing; 16-Housing fixing block; 17-Connecting plate; 2-Transmission device; 21-First gear; 22-Second gear; 221-Insertion block; 23-Third gear; 231-Insertion hole; 24-Fourth gear; 25-Second bearing; 26-Gear shaft; 27-Third bearing; 28-Fixing screw; 3-Fan; 31-Connecting frame; 32-Heat sink fins; 33-Positioning buckle; 34-Threaded hole. Detailed Implementation

[0013] To make the technical means, creative features, achieved objectives and effects of this utility model easier to understand, the utility model will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of this utility model, and therefore only show the relevant components of this utility model.

[0014] Based on the technical solution of this utility model, without changing the essential spirit of this utility model, those skilled in the art can propose various interchangeable structural methods and implementation methods. Therefore, the following detailed embodiments and accompanying drawings are merely illustrative descriptions of the technical solution of this utility model, and should not be regarded as the entirety of this utility model or as a limitation or restriction of the technical solution of this utility model.

[0015] The technical solution of this utility model will be further described in detail below with reference to the accompanying drawings and embodiments.

[0016] Example 1, such as Figure 1-3 As shown, a novel motor shaft-driven speed-increasing fan includes a motor shaft 1, a transmission device 2, and a fan 3. A heat dissipation casing 15 is rotatably connected to the outer side of the motor shaft 1 via a first bearing 12. During operation, heat is dissipated through the casing, a conventional heat dissipation method for motors. Furthermore, the fan 3 rotates along with the motor shaft 1. However, this design differs from existing technologies in that: Fan 3 is mounted on the outside of heat sink housing 15 via transmission device 2. Transmission device 2 is connected to motor shaft 1. Transmission device 2 contains two gear sets, which are connected to fan 3 after changing the speed ratio to reduce torque and increase speed. Using the motor's own power, the speed of fan 3 is increased after torque reduction and speed increase, thereby enhancing the cooling effect of the cooling fan without increasing the motor's speed. In this design, the overall structure is compact and lighter than other ordinary reduction mechanisms, effectively improving the forced air cooling efficiency of the motor, controlling the overall motor temperature, and without affecting the bearing's output speed to the outside.

[0017] In specific manufacturing, the active drive side of the first gear set of the transmission device 2 is coaxially and fixedly connected to the motor shaft 1, the passive drive end of the first gear set is fixedly connected to one side gear of the second gear set of the transmission device 2, the other side gear of the second gear set of the transmission device 2 is rotatably connected to the motor shaft 1 through the second bearing 25, and the top of the other side gear of the second gear set is fixedly connected to the fan 3 to realize the transmission of the fan 3.

[0018] More specifically, during manufacturing, such as Figures 4 to 6 As shown, the first gear set of the transmission device 2 includes a first gear 21 and a second gear 22, and the second gear set includes a third gear 23 and a fourth gear 24. The first gear 21 is coaxially fixed to the outside of the motor shaft 1. The second gear 22 is fixed to the connecting plate 17 of the heat dissipation housing 15 via a gear shaft 26, and meshes with the first gear 21. The third gear 23 is fixed to the top of the second gear 22 and coaxially arranged with it. The gear ratio of the third gear 23 is greater than that of the second gear 22, thus achieving a torque reduction and speed increase effect on the fan 3. The third gear 23 meshes with the fourth gear 24. The fourth gear 24 is coaxially and rotatably connected to the motor shaft 1 via a second bearing 25. The top of the fourth gear 24 is fixedly connected to the fan 3. Therefore, the third gear 23 only transmits power to the fourth gear 24. Since the design of the second bearing 25 does not affect the motor shaft 1, and the fan 3 is fixed to the fourth gear 24, it drives the fan 3 to rotate at an accelerated speed.

[0019] In implementation, it can also be designed as follows: insert blocks 221 are welded to both sides of the top of the second gear 22, and insertion holes 231 are opened on both sides of the third gear 23. The third gear 23 is fixed to the top of the second gear 22 through the cooperation of the insert blocks 221 and the insertion holes 231. The reason for adopting the insert method is that it is difficult to machine the tooth profile if the two gears are fixed together, so they must be designed separately. However, in order to achieve the stability of the separate design, the insert method is adopted here. The shape of the insert block 221 matches the inner wall of the insertion hole 231, which facilitates the insertion together. The stable connection of the two gears can cope with relatively large torque changes and speed changes, so as to achieve better and more efficient transmission.

[0020] When the motor shaft 1 is working, its own rotation drives the first gear 21 to rotate synchronously. Since the second gear 22 is meshed with the first gear 21, the first gear 21 will drive the second gear 22 to rotate. The second gear 22 and the third gear 23 are coaxially connected on the gear shaft 26, and the gear ratio of the third gear 23 is greater than that of the second gear 22. Therefore, when the third gear 23 drives the fourth gear 24 to rotate, it will drive the fourth gear 24 to rotate faster. Finally, the fourth gear 24 drives the fan 3 to rotate at high speed. The speed of the fan 3 is higher than that of the motor shaft 1, thereby achieving a better speed-up and cooling effect.

[0021] Example 2, based on the solution of Example 1, please continue reading. Figure 4 The fan 3 is fixedly connected to the top of the fourth gear 24 via the connecting frame 31. The fan 3 is provided with heat dissipation fins 32 on its outer periphery, and the blades of the heat dissipation fins 32 are arc-shaped and have a larger heat dissipation area.

[0022] Please see Figure 6 The top of the fourth gear 24 is fixedly connected to the root of the connecting frame 31 by a fixing screw 28. The outer end of the connecting frame 31 is fixedly connected to the fan 3 by a screw through a threaded hole 34. To facilitate positioning and installation, a positioning buckle 33 is provided at the connection between the connecting frame 31 and the fan 3. The positioning buckle 33 has a concave-convex structure. When the two are engaged, they can align the holes of the threaded hole 34, thus facilitating the installation of screws for fixation.

[0023] Please see Figure 5 The gear shaft 26 is rotatably connected to the second gear 22 and the third gear 23 via the third bearing 27. The second gear 22 and the third gear 23 are fixedly connected for synchronous rotation. The second gear 22 and the third gear 23 are connected to the outer ring of the third bearing 27, thus rotating relative to the gear shaft 26. Furthermore, in implementation, the connecting frame 31 and the connecting plate 17 are respectively provided with weight-reducing grooves. The weight-reducing grooves on the connecting frame 31 can reduce weight and also dissipate heat. The weight-reducing grooves on the connecting plate 17 also play a certain role in weight reduction and heat dissipation. The gear shaft 26 is installed on the connecting plate 17 at a position not covered by a weight-reducing groove, and the installation position is thickened to provide a sufficient mounting base.

[0024] Please continue reading. Figure 2A bearing sleeve 14 is rotatably connected to the outer side of the motor shaft 1 via a first bearing 12. A bearing cover 13 is provided on the top of the bearing sleeve 14, and the transmission device 2 is installed on the top of the bearing cover 13. The outer periphery of the bearing sleeve 14 is fixedly connected to the heat dissipation shell 15 via a connecting plate 17. The root of the connecting plate 17 is fixed to the middle of the outer periphery of the bearing sleeve 14, and the end of the connecting plate 17 is fixed to the heat dissipation shell 15. It can be manufactured by integral casting.

[0025] Alternatively, as a preferred option, see [link / reference]. Figure 1 and Figure 2 The outer surface of the heat dissipation housing 15 is provided with multiple layers of uniform heat dissipation fins, with adjacent layers of heat dissipation fins staggered to facilitate heat dissipation between them. The top of the motor shaft 1 is provided with a locking head 11, and a certain gap is left between the bottom of the locking head 11 and the connecting frame 31. Sealing materials, such as sealing sleeves or sealing strips, can be installed in the gap to prevent external impurities from entering the interior of the transmission device 2. In addition, a sealing cover is also installed on the top of the second bearing 25, but it does not contact the locking head 11 to avoid rotational interference.

[0026] Finally, it should be noted that after the fan 3 in this scheme is assembled, a protective cover should be added to wrap around the outside of the fan 3. The protective cover has evenly spaced heat dissipation holes. The protective cover is locked by locking head 11, but its shaft is also installed with other rotating shafts to achieve the effect of not rotating with the motor shaft 1, and preferably it is fixed to the heat dissipation shell 15.

[0027] Through the solutions in Examples 1 and 2, this solution solves the problem of motor overheating caused by insufficient cooling airflow and air speed at low motor speeds, and also solves the problem of reduced fan speed caused by the motor shaft 1 outputting high torque.

[0028] The advantages of this solution are: simple structure; light weight; convenient maintenance; no need to disassemble; significant speed increase effect; and it can be matched with different motor speeds.

[0029] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. These undisclosed elements are all prior art known to those skilled in the art.

[0030] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of this utility model. It should be understood that the above description is only a specific embodiment of this utility model and is not intended to limit the scope of protection of this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the scope of protection of this utility model.

Claims

1. A novel shaft-driven speed-increasing fan for an electric motor, characterized in that: The device includes a motor shaft (1), a transmission device (2), and a fan (3). The outer side of the motor shaft (1) is rotatably connected to a heat sink (15) via a first bearing (12). The fan (3) is installed on the outer side of the heat sink (15) via the transmission device (2). The transmission device (2) is connected to the motor shaft (1) in a transmission connection. The transmission device (2) is provided with two gear sets. The two gear sets are connected to the fan (3) in a transmission connection after the speed ratio is changed to reduce torque and increase speed.

2. The shaft-driven speed-increasing fan of a novel motor according to claim 1, characterized in that: The active drive side of the first gear set of the transmission device (2) is fixedly connected to the motor shaft (1), the passive drive gear of the first gear set is fixedly connected to one side gear of the second gear set of the transmission device (2), the other side gear of the second gear set of the transmission device (2) is rotatably connected to the motor shaft (1) through the second bearing (25), and the top of the other side gear of the second gear set is fixedly connected to the fan (3).

3. The shaft-driven speed-increasing fan of a novel motor according to claim 2, characterized in that: The first gear set of the transmission device (2) includes a first gear (21) and a second gear (22), and the second gear set of the transmission device (2) includes a third gear (23) and a fourth gear (24). The first gear (21) is coaxially fixed on the motor shaft (1), and the second gear (22) is fixed on the connecting plate (17) of the heat sink shell (15) through the gear shaft (26). The second gear (22) meshes with the first gear (21), and the third gear (23) is coaxially fixed on the top of the second gear (22). The gear ratio of the third gear (23) is greater than that of the second gear (22). The third gear (23) meshes with the fourth gear (24). The fourth gear (24) is coaxially and rotatably connected to the motor shaft (1) through the second bearing (25). The top of the fourth gear (24) is fixedly connected to the fan (3).

4. The shaft-driven speed-increasing fan of a novel motor according to claim 3, characterized in that: The fan (3) is fixedly connected to the top of the fourth gear (24) via a connecting frame (31), and heat dissipation fins (32) are provided on the outer periphery of the fan (3). The second gear (22) has inserts (221) on both sides of its top, and the third gear (23) has holes (231) on both sides. The third gear (23) is fixed to the top of the second gear (22) by the cooperation of the inserts (221) and the holes (231).

5. The shaft-driven speed-increasing fan of a novel motor according to claim 4, characterized in that: The top of the fourth gear (24) is fixedly connected to the root of the connecting frame (31) by a fixing screw (28), and the outer end of the connecting frame (31) is fixedly connected to the fan (3) by a screw through a threaded hole (34).

6. The shaft-driven speed-increasing fan of a novel motor according to claim 5, characterized in that: The connection between the connecting frame (31) and the fan (3) is provided with a positioning buckle (33), which has a concave-convex structure.

7. The shaft-driven speed-increasing fan of a novel motor according to claim 3, characterized in that: The gear shaft (26) is rotatably connected to the second gear (22) and the third gear (23) through the third bearing (27).

8. The shaft-driven speed-increasing fan of a novel motor according to claim 4, characterized in that: The connecting frame (31) and the connecting plate (17) are respectively provided with weight reduction grooves; the fins of the heat dissipation fins (32) are arc-shaped sheet structures.

9. The shaft-driven speed-increasing fan of a novel motor according to claim 1, characterized in that: The outer side of the motor shaft (1) is rotatably connected to a bearing sleeve (14) via a first bearing (12). The top of the bearing sleeve (14) is provided with a bearing cover (13). The outer periphery of the bearing sleeve (14) is fixedly connected to the heat dissipation shell (15) via a connecting plate (17).

10. A novel motor shaft-driven speed-increasing fan according to claim 9, characterized in that: The outer surface of the heat dissipation shell (15) is provided with multiple layers of uniform heat dissipation fins, with adjacent layers of heat dissipation fins being staggered; the top of the motor shaft (1) is provided with a locking head (11).

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