CN216649460U

CN216649460U - Drive device

Info

Publication number: CN216649460U
Application number: CN202220211710.9U
Authority: CN
Inventors: 武君
Original assignee: Shenzhen Dousuo Technology Co ltd
Current assignee: Foshan Dousuo Technology Co ltd
Priority date: 2022-01-24
Filing date: 2022-01-24
Publication date: 2022-05-31
Anticipated expiration: 2032-01-24

Abstract

The utility model discloses a driving device, which comprises a motor and a gear box in transmission connection with the motor, wherein the motor comprises a motor shell, a stator and a rotor, wherein the stator and the rotor are arranged in the motor shell and can rotate relatively; the gear case comprises a gear shell and a transmission gear arranged in the gear shell, the transmission gear is in meshing transmission with the rotating shaft, the motor shell and the gear shell are of an integral structure, and the peripheral surface of the motor shell is provided with a radiating fin; in addition, the motor shell forms radiating fins to enhance the radiating effect of the motor and ensure the electrical safety.

Description

Drive device

Technical Field

The utility model relates to the technical field of power equipment, in particular to a driving device.

Background

The motor is used as the most common power source and widely applied to daily life, such as the power source of various household appliances, such as a washing machine, a range hood, an electric fan, an electric hair drier and the like; or as a drive motor for automobile engines, windows, doors, etc. Nowadays, motors are combined with intelligent systems as drives for unmanned operations, such as unmanned trolleys and the like.

In practical application, not only is the user body affected, but the high-speed rotation of the motor usually needs to be decelerated to a reasonable range through the gear box to drive the load to rotate. However, after the motor is assembled with the gear box, the product generates a relatively large noise test during operation due to component tolerance, assembly precision and the like, and the service life of the product is greatly reduced.

Disclosure of Invention

In view of this, a drive device with low noise and good experience is provided.

A driving device comprises a motor and a gear box in transmission connection with the motor, wherein the motor comprises a motor shell, a stator and a rotor, the stator and the rotor are arranged in the motor shell and can rotate relatively, and the rotor comprises a rotating shaft; the gear box includes the gear shell with set up in drive gear in the gear shell, drive gear with pivot meshing transmission, the motor casing with gear shell structure as an organic whole, the outer peripheral face of motor casing is provided with the fin.

Furthermore, the transmission gear comprises a plurality of gear sets arranged side by side, a containing hole is formed in the gear shell corresponding to each gear set, and the containing holes are communicated with each other.

Furthermore, the transmission gear further comprises an output shaft, and the tail end of the output shaft is of a hollow structure and extends out of the gear shell to be sleeved with a load.

Further, the rotating shaft comprises an output end connected with the transmission gear, the output end forms helical teeth, and the transmission gear comprises a helical gear meshed with the helical teeth.

Further, the rotating shaft comprises a supporting end deviating from the transmission gear, and the supporting end is connected with a balancing weight.

Further, an end cover is arranged on the upper cover of the motor shell, the balancing weight is contained in the end cover, and radiating fins are arranged on the peripheral face of the end cover.

Furthermore, the cross section of the supporting end is D-shaped or runway-shaped, a connecting hole spliced with the supporting end is formed in the center of the balancing weight, and the cross section of the connecting hole is consistent with that of the supporting end.

Further, its characterized in that, the rotor still includes rotor core and permanent magnet, the pivot is worn to locate rotor core's central authorities, the permanent magnet pastes and locates rotor core's outer peripheral face and following rotor core's circumference evenly spaced arrangement.

Further, rotor core includes a plurality of first blade of silicon steel and an at least second blade of silicon steel, first blade of silicon steel is polygonal structure and forms the recess between its adjacent both sides limit, second blade of silicon steel is polygonal structure and forms the convex part between its adjacent both sides limit, a plurality of first blade of silicon steel and the corresponding side of an at least second blade of silicon steel constitute binding face jointly, each the permanent magnet pastes and locates one of them binding face is last and centre gripping in between two adjacent convex parts of an at least second blade of silicon steel.

Further, a ring groove is formed in the center of the side end, facing the gear box, of the rotor core in an inward concave mode.

Compared with the prior art, the gear shell and the motor shell of the driving device are of an integrated structure, so that the axial directions of the motor rotor and the transmission gear are ensured to be parallel to each other after assembly, the assembly process can be simplified, the influence of element tolerance or assembly error during assembly can be effectively avoided, and the matching precision is high and the noise is low; in addition, the motor shell forms radiating fins to enhance the radiating effect of the motor and ensure the electrical safety.

Drawings

Fig. 1 is a schematic structural diagram of a driving device according to an embodiment of the present invention.

Fig. 2 is a sectional view of the driving apparatus shown in fig. 1.

Fig. 3 is an exploded view of the driving apparatus shown in fig. 1.

Fig. 4 is another angular view of fig. 3.

Fig. 5 is a plan view of a gear box of the drive device shown in fig. 1.

Fig. 6 is an exploded view of the motor rotor of the drive device shown in fig. 1.

Fig. 7 is a plan view of the rotor of the motor shown in fig. 6.

Detailed Description

To facilitate an understanding of the utility model, the utility model will now be described more fully with reference to the accompanying drawings. One or more embodiments of the present invention are illustrated in the accompanying drawings to provide a more accurate and thorough understanding of the disclosed embodiments. It should be understood, however, that the present invention may be embodied in many different forms and should not be construed as being limited to the embodiments set forth herein.

The same or similar reference numbers in the drawings correspond to the same or similar parts; in the description of the present invention, it should be understood that if there is an orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", etc. based on the orientation or positional relationship shown in the drawings, it is only for convenience of describing the present invention and simplifying the description, but it is not intended to indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and are not to be construed as limiting the present patent, and the specific meaning of the terms may be understood by those skilled in the art according to specific circumstances.

The utility model provides a driving device, which is preferably applied to an unmanned carrying trolley and an automobile as a power element. Fig. 1-7 show a specific embodiment of the driving device of the present invention, which includes a motor 100 and a gear box 200 in driving connection with the motor 100.

The motor 100 is preferably a brushless direct current motor (BLDC) including a motor housing 10, and a stator 20 and a rotor 30 disposed in the motor housing 10, and in the illustrated embodiment, the motor 100 is an inner rotor motor, and the rotor 30 is movably disposed at the center of the stator 20. As shown in fig. 2, the stator 20 includes a stator core 22 and a coil 24 wound on the stator core 22, and the coil 24 is energized to generate an alternating magnetic field and polarize the stator core 22, so that the stator 20 forms N, S magnetic poles alternately in the circumferential direction; as shown in fig. 6, the rotor 30 includes a rotor core 32 and permanent magnets 34 attached to the rotor core 32, the permanent magnets 34 are usually plural and uniformly spaced along the circumferential direction of the rotor 30, and the polarities of adjacent permanent magnets 34 are opposite, so that the rotor 30 forms N, S magnetic poles alternately in the circumferential direction. In this way, the magnetic field of the stator 20 and the magnetic field of the rotor 30 push the rotor 30 to rotate continuously under the combined action of the magnetic attraction force and the repulsion force. Preferably, the number of poles of the stator 20 is different from the number of poles of the rotor 30, so as to avoid dead spots from being formed to affect the starting of the rotor 30.

As shown in fig. 6 and 7, the rotor 30 is preferably of a surface mount (SPM) structure in which permanent magnets 34 are attached to an outer circumferential surface of a rotor core 32. The rotor core 32 is formed by stacking a plurality of

silicon steel sheets

32a, 32b, each

silicon steel sheet

32a, 32b is a regular polygon structure as a whole, and the corresponding side edges of each stacked

silicon steel sheet

32a, 32b form a joint plane 321 together, which facilitates the assembly of the permanent magnet 34. A through hole 323 is formed in the center of each

silicon steel sheet

32a, 32b, and the through holes 323 of the stacked

silicon steel sheets

32a, 32b together form a shaft hole for inserting the rotating shaft 36. As shown in fig. 2, the rotating shaft 36 includes opposite supporting ends 361 and an output end 363, and the output end 363 extends out of the motor housing 10 and is in driving fit with the gear box 200. In the illustrated embodiment, the output end 363 of the rotating shaft 36 is formed with helical teeth to engage with the helical gear 51 of the gear box 200 for power transmission. In other embodiments, the output end 363 may be formed with flat teeth, or the output end 363 may be sleeved with gears, etc.

To keep the rotation balance of the rotating shaft 36, the supporting end 361 is connected with the weight 38, and the weight 38 rotates synchronously with the rotating shaft 36 to balance the load of the output end 363 thereof, so as to avoid the deflection of the rotating shaft 36. Preferably, the supporting end 361 of the rotating shaft 36 is notched to form a cut 365 at the notched position, in this embodiment, the supporting end 361 is notched at both sides to form a runway-shaped cross section, and correspondingly, a runway-shaped connecting hole 381 is formed at the center of the weight block 38 to be inserted into the supporting end 361, and after the two are inserted, a limit is formed in the circumferential direction, so that relative rotation is avoided, the connecting strength is ensured, and the unbalance amount of the rotor 30 is reduced. In some embodiments, the supporting end 361 may also be cut at one side to have a D-shaped cross section, and correspondingly, the connecting hole 381 of the counterweight block 38 has a D-shaped cross section, which also forms a limit in the circumferential direction. Preferably, bearings 39 are disposed in the motor housing 10, and the bearings 39 are preferably ball bearings or the like, and are disposed near both ends of the rotating shaft 36, respectively, to stably support the rotor 30 at both ends thereof.

The rotor core 32 includes a plurality of first silicon steel sheets 32a and at least one second silicon steel sheet 32b, wherein the first silicon steel sheet 32a forms a small groove 325 between two adjacent sides, and the arrangement of the groove 325 enables two adjacent permanent magnets 34 to form an interval in the circumferential direction, thereby reducing harmonic waves. The second silicon steel sheet 32b forms a small convex portion 327 between two adjacent side edges, and the convex portion 327 extends outward along the radial direction of the second silicon steel sheet 32b to form a clamping effect on the permanent magnet 34, thereby simplifying the assembly process and increasing the connection stability of the permanent magnet 34 and the rotor core 32. Preferably, the convex portions 327 have a wedge-shaped structure, the circumferential width of the radial outer end of each convex portion 327 is greater than the circumferential width of the radial inner end of each convex portion, and the interval width between two adjacent convex portions 327 is reduced from inside to outside, so that the permanent magnet 34 is clamped, and the permanent magnet 34 is prevented from falling off due to vibration and the like. To secure the clamping effect on the permanent magnets 34, one or more second silicon steel sheets 32b may be provided at every certain number of the first silicon steel sheets 32 a.

As shown in fig. 5, the gear box 200 includes a gear housing 40 and a plurality of transmission gears 50 disposed in the gear housing 40, wherein the transmission gears 50 include a first gear set, a second gear set and a third gear set disposed side by side, wherein the first gear set includes a first large gear 51 and a first small gear 52 coaxially disposed, and the first large gear 51 has a larger diameter than the first small gear 52; the second gear set comprises a second large gear 53 and a second small gear 54 which are coaxially arranged, wherein the diameter of the second large gear 53 is larger than that of the second small gear 54; the third gear set comprises a third gearwheel 55 and an output shaft 56, wherein the third gearwheel 55 is fixedly sleeved on the output shaft 56 and the third gearwheel and the output shaft are coaxially arranged. The first gearwheel 51 is a helical gear, and is engaged with the output shaft 56 of the motor 100; the first small gear 52 is meshed with the second large gear 53, the second small gear 54 is meshed with the third large gear 55, so that the step-by-step reduction transmission is realized, and finally, the high-speed rotation of the rotating shaft 36 of the motor 100 is converted into the low-speed rotation of the output shaft 56.

Preferably, the motor case 10 and the gear case 40 are an integral structure and together constitute a case of the driving apparatus, the case forming a first space 12 and a second space 42 at both sides thereof, respectively, wherein the stator 20 and the rotor 30 are installed in the first space 12, and the transmission gear 50 is installed in the second space 42. The outside end cover of motor casing 10 is equipped with first end cover 14, and first end cover 14 passes through fixed connection such as screw with motor casing 10, seals first space 12, and balancing weight 38 holds in first end cover 14. The outer end cover of the gear housing 40 is provided with a second end cover 44, and the second end cover 44 is fixedly connected with the gear housing 40 through screws and the like to seal the second space 42. The housing forms a through hole 16 at a position corresponding to the rotating shaft 36 of the rotor 30, and the output end 363 of the rotating shaft 36 extends into the second space 42 through the through hole 16 to be meshed with a bevel gear of the transmission gear 50, i.e., the first large gear 51. Preferably, the rotor core 32 is recessed in the center of its end facing the through hole 16 to form a ring groove 329, and the bearing seat 390 for mounting the bearing 39 in the motor case 10 can be inserted into the ring groove 329, reducing the axial height of the motor 100 as a whole.

An output shaft 56 of the transmission gear 50 is arranged in parallel with the rotating shaft 36 of the rotor 30 at an interval, one end of the output shaft is connected with the third large gear 55, and the other end of the output shaft passes through the through hole 46 of the second end cover 44 and extends outwards to be connected with a load, so as to transmit power outwards. Preferably, the output shaft 56 is a hollow structure and can be sleeved on the input end of the load, so that the axial size of the whole is effectively reduced. Preferably, a plurality of accommodating

holes

421, 423, 425 are formed in the gear housing 40, and the plurality of accommodating

holes

421, 423, 425 are communicated with each other and jointly form the second space 42. Each

accommodating hole

421, 423, 425 accommodates one of the gear sets, and the

accommodating holes

421, 423, 425 are preferably stepped holes, and the size of each accommodating hole is matched with that of the

gears

51, 52, 53, 54, 55, so that the transmission gear 50 and the inner wall surface of the gear shell 40 form proper clearance fit, the structure is compact on the whole, the grease consumption filled between the transmission gear 50 and the gear shell 40 is saved, the noise and the loss generated by the operation of the transmission gear 50 are reduced, and the transmission efficiency and the reliability are improved.

The gear case 40 and the motor case 10 are of an integral structure, the consistency of the axial directions of the

accommodating holes

421, 423, 425 for assembling the gear sets and the through hole 16 penetrating the rotating shaft 36 can be ensured in the production process, the rotating shaft 36 and the output shaft 56 as well as the axial directions of the gear sets are ensured to be parallel to each other after assembly, the assembly process can be simplified, the influence of element tolerance or assembly error during assembly can be effectively avoided, the matching precision is high, and the reliability is high. Preferably, the heat sink 18 is formed on the outer peripheral surface of the motor casing 10 (including the first end cap 14), so as to enhance the heat dissipation effect of the motor 100, and timely dissipate heat generated by the electronic components of the motor 100, such as the coil 24, and ensure the electrical safety of the motor 100. In this embodiment, the motor casing 10 is made of a metal material with good heat conduction and light weight, such as aluminum or an aluminum alloy material, and the heat sink 18 and the motor casing 10 can be integrally formed by aluminum extrusion and other processes, so that the forming is fast and the cost is low.

It should be noted that the present invention is not limited to the above-mentioned embodiments, and other changes and modifications can be made by those skilled in the art according to the spirit of the present invention, and these changes and modifications made according to the spirit of the present invention should be included in the scope of the present invention as claimed.

Claims

1. A driving device comprises a motor and a gear box in transmission connection with the motor, and is characterized in that the motor comprises a motor shell, a stator and a rotor which are arranged in the motor shell and can rotate relatively, and the rotor comprises a rotating shaft; the gear box includes the gear shell with set up in drive gear in the gear shell, drive gear with pivot meshing transmission, the motor casing with gear shell structure as an organic whole, the outer peripheral face of motor casing is provided with the fin.

2. The drive of claim 1, wherein said drive gear includes a plurality of gear sets arranged side by side, said gear case defining a receiving hole corresponding to each of said gear sets, said receiving holes communicating with each other.

3. The drive of claim 2, wherein said drive gear further comprises an output shaft, said output shaft terminating in a hollow structure and extending out of said gear housing for telescoping with a load.

4. The drive of claim 2, wherein said shaft includes an output end coupled to said drive gear, said output end defining helical teeth, said drive gear including a helical gear in meshing engagement with said helical teeth.

5. The drive of claim 1, wherein the shaft includes a support end facing away from the drive gear, the support end having a weight coupled thereto.

6. The drive of claim 5, wherein the motor housing upper cover is provided with an end cap in which the weight is received, and an outer peripheral surface of the end cap is provided with a heat sink.

7. The driving apparatus as claimed in claim 5, wherein the supporting end has a D-shaped or racetrack-shaped cross section, and the weight member has a connecting hole formed at its center for mating with the supporting end, the connecting hole having a cross-sectional shape corresponding to the cross-sectional shape of the supporting end.

8. The driving device according to any one of claims 1 to 7, wherein the rotor further includes a rotor core and permanent magnets, the rotating shaft is disposed through the center of the rotor core, and the permanent magnets are attached to the outer circumferential surface of the rotor core and are uniformly spaced along the circumferential direction of the rotor core.

9. The driving device according to claim 8, wherein the rotor core includes a plurality of first silicon steel sheets and at least one second silicon steel sheet, the first silicon steel sheet is a polygonal structure and has a groove formed between two adjacent sides, the second silicon steel sheet is a polygonal structure and has a protrusion formed between two adjacent sides, corresponding sides of the plurality of first silicon steel sheets and the at least one second silicon steel sheet together form a joint surface, and each of the permanent magnets is attached to one of the joint surfaces and clamped between two adjacent protrusions of the at least one second silicon steel sheet.

10. The drive of claim 8, wherein a ring groove is formed inward in the center of the rotor core toward the side end of the gear case.