Drive mechanism

Abstract

The embodiment of the utility model discloses a driving mechanism which comprises a motor, a first-stage planetary reducer, a second-stage planetary reducer and a cooling fan, and the first power input end of the first-stage planetary reducer is connected with the motor; the second power input end of the second-stage planetary reducer is connected with the first power output end of the first-stage planetary reducer, and the second power output end of the second-stage planetary reducer is used for outputting torque; the cooling fan is arranged at the first power output end of the first-stage planetary reducer. The cooling fan is arranged at the first power output end of the first-stage planetary reducer, the first-stage planetary reducer can drive the cooling fan to rotate, and therefore the effect of cooling the motor can be achieved, in addition, the cooling fan is not directly connected to the power output shaft of the motor, the motor does not need to directly drive the cooling fan to rotate, and the cooling efficiency is improved. Therefore, the power consumption of the motor is effectively reduced and the service life of the motor is prolonged.

Description

Technical Field

[0001] The present application relates to the field of smart home technology, and in particular to a driving mechanism. Background Art

[0002] In order to effectively solve the heat dissipation problem of the motor, the drive mechanism with planetary reduction mechanism on the market usually installs a cooling fan on the output shaft of the motor, so that the motor drives the cooling fan to rotate, thereby dissipating heat and cooling the motor. However, since the cooling fan is directly installed on the output shaft of the motor, the motor needs to consume a certain amount of additional power to drive the cooling fan to rotate, which increases the power consumption of the motor and greatly shortens the service life of the motor. Utility Model Content

[0003] Based on this, it is necessary to provide a driving mechanism that can dissipate heat and cool the motor and reduce the power consumption of the motor.

[0004] A driving mechanism, comprising:

[0005] Motor;

[0006] A first-stage planetary reducer, wherein a first power input end of the first-stage planetary reducer is connected to the motor;

[0007] A second-stage planetary reducer, wherein a second power input end of the second-stage planetary reducer is connected to a first power output end of the first-stage planetary reducer, and the second power output end of the second-stage planetary reducer is used to output torque; and

[0008] A cooling fan is arranged at the first power output end of the first-stage planetary reducer.

[0009] In one embodiment, the motor is a waterproof motor.

[0010] In one embodiment, the first stage planetary reducer comprises:

[0011] First stage planet carrier;

[0012] A first-stage planetary gear shaft, disposed at one end of the first-stage planetary carrier;

[0013] A first-stage planetary gear, rotatably disposed on the first-stage planetary gear shaft;

[0014] A first-stage sun gear is disposed on the output shaft of the motor and meshes with the first-stage planetary gear;

[0015] A first-stage gearbox is sleeved on the outer sides of the first-stage planet carrier, the first-stage planet gear shaft, the first-stage planet gear and the first-stage sun gear, and meshes with the first-stage planet gear; and

[0016] The first-stage power output shaft is arranged at one end of the first-stage planetary carrier away from the first-stage planetary gear shaft, the second power input end of the second-stage planetary reducer is connected to the first-stage power output shaft, and the cooling fan is arranged on the first-stage power output shaft.

[0017] In one embodiment, a positioning assembly is provided between the first-stage power output shaft and the cooling fan, and the positioning assembly is used to locate the relative positions of the cooling fan and the first-stage power output shaft; and / or

[0018] A limiting member is also provided on the first-stage power output shaft, and the limiting member is used to limit the axial movement of the cooling fan along the first-stage power output shaft.

[0019] In one embodiment, the positioning assembly includes a positioning shaft and a positioning hole, one of the first-stage power output shaft and the cooling fan is provided with a positioning shaft, and the other of the first-stage power output shaft and the cooling fan is provided with a positioning hole, and the positioning shaft is inserted into the positioning hole.

[0020] In one embodiment, the number of the first-stage planetary gear shafts and the first-stage planetary gears are both multiple, the multiple first-stage planetary gear shafts are arranged on the first-stage planet carrier at intervals, and the multiple first-stage planetary gears correspond one-to-one to the multiple first-stage planetary gear shafts, respectively.

[0021] In one embodiment, the first stage planetary reducer further comprises:

[0022] A first base, on which the first stage gearbox is mounted; and / or

[0023] The first bearing is arranged between the inner wall of the first-stage gear box and the outer wall of the first-stage planetary carrier.

[0024] In one embodiment, the second stage planetary reducer comprises:

[0025] Second stage planet carrier;

[0026] A second-stage planetary gear shaft is disposed at one end of the second-stage planetary carrier;

[0027] A second-stage planetary gear, rotatably disposed on the second-stage planetary gear shaft;

[0028] A second-stage sun gear is disposed at an end of the first-stage power output shaft away from the first-stage planetary carrier and meshes with the second-stage planetary gear; and

[0029] The second-stage gearbox is sleeved on the outer sides of the second-stage planetary carrier, the second-stage planetary gear shaft, the second-stage planetary gear and the second-stage sun gear, and is meshed with the second-stage planetary gear. The second-stage planetary carrier is used for outputting torque.

[0030] In one embodiment, the number of the second-stage planetary gear shafts and the second-stage planetary gears are both multiple, the multiple second-stage planetary gear shafts are arranged on the second-stage planet carrier at intervals, and the multiple second-stage planetary gears correspond one-to-one to the multiple second-stage planetary gear shafts, respectively.

[0031] In one of the embodiments, it further includes a shell, the first-stage planetary reducer, the second-stage planetary reducer and the cooling fan are all arranged in the shell, and the shell is provided with cooling holes at positions corresponding to the cooling fan.

[0032] The driving mechanism provided in the present application increases the transmission ratio of the motor by driving the first-stage planetary reducer and the second-stage planetary reducer through the motor, thereby increasing the output torque of the motor. The two-stage planetary reducer has a better and more stable deceleration effect than the traditional one-stage planetary reducer, and will not generate a large vibration force on the motor, thereby increasing the service life of the motor. In the present solution, the cooling fan is arranged at the first power output end of the first-stage planetary reducer, and the first-stage planetary reducer can drive the cooling fan to rotate, thereby achieving the effect of heat dissipation and cooling the motor, avoiding the problem of burning of internal parts of the motor due to the failure to dissipate the heat generated by the motor in time. In addition, since the cooling fan is not directly connected to the power output shaft of the motor, the motor does not need to directly drive the rotation of the cooling fan, thereby effectively reducing the power consumption of the motor and extending the service life of the motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0034] Figure 1 is a cross-sectional view of a driving mechanism in one embodiment;

[0035] Figure 2 is a cross-sectional view of a local structure of a driving mechanism in an embodiment;

[0036] Figure 3 is an exploded view of a driving mechanism in one embodiment;

[0037] Figure 4is a partial structural diagram of a driving mechanism in one embodiment;

[0038] Figure 5 It is a cross-sectional view of a local structure of a driving mechanism in one embodiment. DETAILED DESCRIPTION

[0039] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0040] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0041] In addition, the descriptions of "first", "second", etc. in the present utility model are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, "and / or" in the full text includes three solutions. Taking A and / or B as an example, it includes technical solution A, technical solution B, and technical solution that satisfies both A and B; in addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0042] like Figure 1 As shown, the present application provides a driving mechanism 10. In this embodiment, the driving mechanism 10 can be used for smart home products such as floor scrubbers and mops. The driving mechanism 10 includes a motor 100, a first-stage planetary reducer 200, a second-stage planetary reducer 300, and a cooling fan 400. The first power input end of the first-stage planetary reducer 200 is connected to the motor 100; the second power input end of the second-stage planetary reducer 300 is connected to the first power output end of the first-stage planetary reducer 200, and the second power output end of the second-stage planetary reducer 300 is used to output torque; the cooling fan 400 is arranged at the first power output end of the first-stage planetary reducer 200.

[0043] The drive mechanism 10 provided in the present application increases the transmission ratio of the motor 100 by driving the first-stage planetary reducer 200 and the second-stage planetary reducer 300 through the motor 100, thereby increasing the output torque of the motor 100. Compared with the traditional one-stage planetary reducer, the two-stage planetary reducer has a better and more stable deceleration effect, and will not generate a large vibration force on the motor 100, thereby increasing the service life of the motor 100. In the present solution, the cooling fan 400 is arranged at the first power output end of the first-stage planetary reducer 200, and the first-stage planetary reducer 200 can drive the cooling fan 400 to rotate, thereby achieving the effect of heat dissipation and cooling the motor 100, avoiding the problem of internal parts of the motor 100 burning out due to the heat generated by the motor 100 not being dissipated in time. In addition, since the cooling fan 400 is not directly connected to the output shaft of the motor 100, the motor 100 does not need to directly drive the rotation of the cooling fan 400, thereby effectively reducing the power consumption of the motor 100 and thus extending the service life of the motor 100.

[0044] Preferably, the motor 100 is a waterproof motor. Since the present application adopts the motor 100 as a waterproof motor, the waterproof performance of the motor 100 can be effectively improved to prevent water from entering the motor 100 and causing short circuit failure of the motor 100 or rust inside the motor 100.

[0045] like Figure 2 and Figure 3 As shown, the first-stage planetary reducer 200 includes a first-stage planetary carrier 210, a first-stage planetary gear shaft 220, a first-stage planetary gear 230, a first-stage sun gear 240, a first-stage gear box 250 and a first-stage power output shaft 260. The first-stage planetary gear shaft 220 is arranged at one end of the first-stage planetary carrier 210; the first-stage planetary gear 230 is rotatably arranged on the first-stage planetary gear shaft 220; the first-stage sun gear 240 is arranged on the output shaft of the motor 100 and meshes with the first-stage planetary gear 230; the first-stage gear box 250 is sleeved On the outside of the first-stage planetary carrier 210, the first-stage planetary gear shaft 220, the first-stage planetary gear 230 and the first-stage sun gear 240, and meshing with the first-stage planetary gear 230; the first-stage power output shaft 260 is arranged at one end of the first-stage planetary carrier 210 away from the first-stage planetary gear shaft 220, the second power input end of the second-stage planetary reducer 300 is connected to the first-stage power output shaft 260, and the cooling fan 400 is arranged on the first-stage power output shaft 260. Specifically, the cooling fan 400 is sleeved on the outside of the first-stage power output shaft 260.

[0046] Since the first-stage sun gear 240 is arranged on the output shaft of the motor 100, the rotation of the output shaft of the motor 100 can drive the first-stage sun gear 240 to rotate, thereby driving the first-stage planetary gear 230 meshing with the first-stage sun gear 240 to rotate. Since the first-stage gear box 250 is meshed with the first-stage planetary gear 230, the first-stage planetary gear 230 is installed on the first-stage planetary carrier 210 through the first-stage planetary gear shaft 220. The first-stage gear box 250 and the first-stage planetary carrier 210 both start to rotate, and the first-stage planetary carrier 210 drives the first-stage power output shaft 260 to rotate, thereby transmitting the output torque of the first-stage power output shaft 260 to the second-stage planetary reducer 300 and transmitting the output torque through the second power output end of the second-stage planetary reducer 300; and the cooling fan 400 is arranged on the first-stage power output shaft 260, and the rotation of the first-stage power output shaft 260 can also drive the cooling fan 400 to rotate, thereby achieving the effect of heat dissipation and cooling of the motor 100.

[0047] like Figure 4 and Figure 5 As shown, a positioning assembly 270 is provided between the first-stage power output shaft 260 and the cooling fan 400, and the positioning assembly 270 is used to position the relative positions of the cooling fan 400 and the first-stage power output shaft 260, so as to improve the operation stability of the cooling fan 400. Specifically, the positioning assembly 270 includes a positioning shaft 272 and a positioning hole 274, one of the first-stage power output shaft 260 and the cooling fan 400 is provided with the positioning shaft 272, and the other of the first-stage power output shaft 260 and the cooling fan 400 is provided with the positioning hole 274, and the positioning shaft 272 is inserted into the positioning hole 274.

[0048] Specifically in this embodiment, a positioning shaft 272 is provided on the first-stage power output shaft 260, and the positioning shaft 272 passes through the first-stage power output shaft 260. Both ends of the positioning shaft 272 extend outside the first-stage power output shaft 260. The axial direction of the positioning shaft 272 is perpendicular to the axial direction of the first-stage power output shaft 260. Positioning holes 274 are provided on the opposite sides of the cooling fan 400, and the two ends of the positioning shaft 272 are respectively inserted into the two positioning holes 274 of the cooling fan 400.

[0049] A limiting member 280 is also provided on the first-stage power output shaft 260, and the limiting member 280 is used to limit the axial movement of the cooling fan 400 along the first-stage power output shaft 260, thereby improving the operation stability of the cooling fan 400. Specifically, a clamping groove 262 is provided on the circumference of the first-stage power output shaft 260, and the limiting member 280 is a clamping ring. The limiting member 280 is clamped in the clamping groove 262, and the limiting member 280 can abut against the cooling fan 400 to limit the axial movement of the cooling fan 400 along the first-stage power output shaft 260.

[0050] like Figure 2 and Figure 3 As shown, there are multiple first-stage planetary gear shafts 220 and multiple first-stage planetary gears 230, multiple first-stage planetary gear shafts 220 are arranged at intervals on the first-stage planet carrier 210, and multiple first-stage planetary gears 230 correspond to multiple first-stage planetary gear shafts 220. Specifically, multiple first-stage planetary gear shafts 220 are arranged in an array on the first-stage planet carrier 210, multiple first-stage planetary gears 230 are arranged along the circumference of the first-stage sun gear 240, the first-stage sun gear 240 is meshed with each first-stage planetary gear 230, and the first-stage gear box 250 is meshed with each first-stage planetary gear 230.

[0051] The first-stage planetary reducer 200 further includes a first base 290, and the first-stage gearbox 250 is mounted on the first base 290. Specifically, the first base 290 is partially sleeved on the inner side of the first-stage gearbox 250, and the first base 290 and the first-stage gearbox 250 are fixedly connected by threaded fasteners. The first base 290 is disposed between the first-stage planetary gear 230 and the motor 100, and a through hole 291 is disposed in the middle of the first base 290, and the output shaft of the motor 100 passes through the through hole 291 and is connected to the first-stage sun gear 240.

[0052] In order to reduce the friction between the first-stage gearbox 250 and the first-stage planetary carrier 210 , the first-stage planetary reducer 200 also includes a first bearing 292 , which can be an oil-containing bearing and is arranged between the inner wall of the first-stage gearbox 250 and the outer wall of the first-stage planetary carrier 210 .

[0053] The first-stage planetary reducer 200 further includes a first gasket 294, which is disposed between the first-stage planetary gear 230 and the first base 290, thereby preventing the first-stage planetary gear 230 from axially moving, thereby improving the operating stability of the first-stage planetary gear 230. Specifically, the output shaft of the motor 100 sequentially passes through the through hole 291 of the first base 290, the first gasket 294, and is connected to the first-stage sun gear 240.

[0054] like Figure 2 and Figure 3As shown, the second-stage planetary reducer 300 includes a second-stage planetary carrier 310, a second-stage planetary gear shaft 320, a second-stage planetary gear 330, a second-stage sun gear 340 and a second-stage gearbox 350. The second-stage planetary gear shaft 320 is arranged at one end of the second-stage planetary carrier 310; the second-stage planetary gear 330 is rotatably arranged on the second-stage planetary gear shaft 320; the second-stage sun gear 340 is arranged at one end of the first-stage power output shaft 260 away from the first-stage planetary carrier 210, and is meshed with the second-stage planetary gear 330; the second-stage gearbox 350 is sleeved on the outer sides of the second-stage planetary carrier 310, the second-stage planetary gear shaft 320, the second-stage planetary gear 330 and the second-stage sun gear 340, and is meshed with the second-stage planetary gear 330; the second-stage planetary carrier 310 is used to output torque.

[0055] Specifically, since the second-stage sun gear 340 is arranged at one end of the first-stage power output shaft 260 away from the first-stage planetary carrier 210, the first-stage planetary carrier 210 drives the first-stage power output shaft 260 to rotate, the first-stage power output shaft 260 drives the second-stage sun gear 340 to rotate, and the second-stage sun gear 340 drives the second-stage planetary gear 330 meshing with the second-stage sun gear 340 to rotate. Since the second-stage gear box 350 is meshed with the second-stage planetary gear 330, the second-stage planetary gear 330 is installed on the second-stage planetary carrier 310 through the second-stage planetary gear shaft 320, the second-stage gear box 350 and the second-stage planetary carrier 310 both start to rotate, and finally the output torque of the motor 100 is transmitted and output through the rotation of the second-stage planetary carrier 310.

[0056] There are multiple second-stage planetary gear shafts 320 and multiple second-stage planetary gears 330. Multiple second-stage planetary gear shafts 320 are arranged at intervals on the second-stage planet carrier 310, and multiple second-stage planetary gears 330 correspond to multiple second-stage planetary gear shafts 320. Specifically, multiple second-stage planetary gear shafts 320 are arranged in an array on the second-stage planet carrier 310, and multiple second-stage planetary gears 330 are arranged along the circumference of the second-stage sun gear 340. The second-stage sun gear 340 is meshed with each second-stage planetary gear 330, and the second-stage gear box 350 is meshed with each second-stage planetary gear 330.

[0057] like Figure 2 and Figure 3 As shown, the cooling fan 400 is located between the first stage gearbox 250 and the second stage gearbox 350. An output ring gear 312 is disposed at one end of the second stage planet carrier 310 away from the second stage planet gear shaft 320, and the output ring gear 312 is used to output torque.

[0058] The second-stage planetary reducer 300 further includes a second base 360, and the second-stage gearbox 350 is mounted on the second base 360. Specifically, the second base 360 ​​is disposed between the inner wall of the second-stage gearbox 350 and the outer wall of the first-stage power output shaft 260, and the second base 360 ​​and the second-stage gearbox 350 are fixedly connected by threaded fasteners.

[0059] In order to reduce the friction between the second base 360 ​​and the first-stage power output shaft 260 , the second-stage planetary reducer 300 also includes a second bearing 370 , which can be an oil-containing bearing and is arranged between the inner wall of the second base 360 ​​and the outer wall of the first-stage power output shaft 260 .

[0060] The second-stage planetary reducer 300 further includes a second gasket 380, which is disposed between the second-stage planetary gear 330 and the second base 360, thereby preventing the second-stage planetary gear 330 from axially moving, thereby improving the operating stability of the second-stage planetary gear 330. Specifically, the second gasket 380 is sleeved on the outer side of the second-stage sun gear 340.

[0061] In order to reduce the friction between the second-stage gearbox 350 and the second-stage planetary carrier 310 , the second-stage planetary reducer 300 further includes a third bearing 390 , which may be an oil-containing bearing and is disposed between the inner wall of the second-stage gearbox 350 and the outer wall of the second-stage planetary carrier 310 .

[0062] like Figure 1 and Figure 2 As shown, the drive mechanism 10 further includes a housing 500, and the first-stage planetary reducer 200, the second-stage planetary reducer 300, and the heat dissipation fan 400 are all disposed in the housing 500. The housing 500 is provided with heat dissipation holes 510 at positions corresponding to the heat dissipation fan 400, so that the heat generated by the motor 100 can be smoothly discharged through the heat dissipation holes 510 to improve the heat dissipation performance of the drive mechanism 10. Specifically, one end of the housing 500 is connected to the motor 100, and the number of the heat dissipation holes 510 is multiple, and the multiple heat dissipation holes 510 are arranged at intervals along the circumference of the housing 500.

[0063] The above are only preferred embodiments of the present invention, and do not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the utility model concept, or directly / indirectly used in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A driving mechanism, characterized in that: include: Motor; A first-stage planetary reducer, wherein a first power input end of the first-stage planetary reducer is connected to the motor; A second-stage planetary reducer, wherein a second power input end of the second-stage planetary reducer is connected to a first power output end of the first-stage planetary reducer, and the second power output end of the second-stage planetary reducer is used to output torque; as well as A cooling fan is arranged at the first power output end of the first-stage planetary reducer.

2. The driving mechanism according to claim 1, characterized in that: The motor is a waterproof motor.

3. The driving mechanism according to claim 1, characterized in that: The first stage planetary reducer comprises: First stage planet carrier; A first-stage planetary gear shaft, disposed at one end of the first-stage planetary carrier; A first-stage planetary gear, rotatably disposed on the first-stage planetary gear shaft; A first-stage sun gear is disposed on the output shaft of the motor and meshes with the first-stage planetary gear; A first-stage gearbox is sleeved on the outer sides of the first-stage planet carrier, the first-stage planet gear shaft, the first-stage planet gear and the first-stage sun gear, and meshes with the first-stage planet gear; and The first-stage power output shaft is arranged at one end of the first-stage planetary carrier away from the first-stage planetary gear shaft, the second power input end of the second-stage planetary reducer is connected to the first-stage power output shaft, and the cooling fan is arranged on the first-stage power output shaft.

4. The driving mechanism according to claim 3, characterized in that: A positioning assembly is provided between the first-stage power output shaft and the cooling fan, and the positioning assembly is used to locate the relative positions of the cooling fan and the first-stage power output shaft; and / or A limiting member is also provided on the first-stage power output shaft, and the limiting member is used to limit the axial movement of the cooling fan along the first-stage power output shaft.

5. The driving mechanism according to claim 4, characterized in that: The positioning assembly includes a positioning shaft and a positioning hole. One of the first-stage power output shaft and the cooling fan is provided with a positioning shaft, and the other of the first-stage power output shaft and the cooling fan is provided with a positioning hole. The positioning shaft is inserted into the positioning hole.

6. The driving mechanism according to claim 3, characterized in that: There are multiple first-stage planetary gear shafts and multiple first-stage planetary gears. The multiple first-stage planetary gear shafts are arranged on the first-stage planet carrier at intervals, and the multiple first-stage planetary gears correspond to the multiple first-stage planetary gear shafts one by one.

7. The driving mechanism according to claim 3, characterized in that: The first stage planetary reducer also includes: A first base, on which the first stage gearbox is mounted; and / or The first bearing is arranged between the inner wall of the first-stage gear box and the outer wall of the first-stage planetary carrier.

8. The driving mechanism according to claim 3, characterized in that: The second stage planetary reducer comprises: Second stage planet carrier; A second-stage planetary gear shaft is disposed at one end of the second-stage planetary carrier; A second-stage planetary gear, rotatably disposed on the second-stage planetary gear shaft; A second-stage sun gear is disposed at an end of the first-stage power output shaft away from the first-stage planetary carrier and meshes with the second-stage planetary gear; and The second-stage gearbox is sleeved on the outer sides of the second-stage planetary carrier, the second-stage planetary gear shaft, the second-stage planetary gear and the second-stage sun gear, and is meshed with the second-stage planetary gear. The second-stage planetary carrier is used for outputting torque.

9. The driving mechanism according to claim 8, characterized in that: There are multiple second-stage planetary gear shafts and multiple second-stage planetary gears. The multiple second-stage planetary gear shafts are arranged on the second-stage planet carrier at intervals, and the multiple second-stage planetary gears correspond to the multiple second-stage planetary gear shafts one by one.

10. The driving mechanism according to claim 1, characterized in that: It also includes a shell, the first-stage planetary reducer, the second-stage planetary reducer and the cooling fan are all arranged in the shell, and the shell is provided with cooling holes at positions corresponding to the cooling fan.

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