Driving device and closestool unit

Abstract

A driving device and a toilet unit, the driving device including: a motor having a rotating shaft that rotates about a first axis; an output shaft; a transmission assembly transmitting power of the motor to the output shaft, the transmission assembly including a worm rotating about a worm axis, the first axis being parallel to the worm axis, the worm coupled to the rotation shaft; wherein the transmission assembly includes a first gear mounted to the rotating shaft, the first gear rotating in common with the rotating shaft, the worm having a gear portion, the gear portion meshing with the first gear, and wherein a tooth flank of the gear portion is inclined to the first axis, the transmission assembly being configured such that, in a direction of the worm axis, the tooth flank of the gear portion is inclined to the first axis. The force applied to the gear part by the first gear is opposite to the force applied to the worm part by the second gear in direction.

Description

Technical Field

[0001] The utility model relates to a driving device and a toilet unit, and more specifically, to a driving device with higher space utilization rate and a corresponding toilet unit. Background Art

[0002] There is a driving device in a smart toilet for automatically opening or closing the toilet lid. The miniaturization of the driving device is crucial for the smart toilet. In the prior art, while miniaturizing the driving device, some technical problems are brought, such as low assembly accuracy, difficult wiring, poor connection strength, and easy wear of the motor.

[0003] Therefore, it is desirable to propose a driving device to improve the defects of the prior art. Summary of the Utility Model

[0004] According to a first aspect of the present disclosure, a driving device is proposed, including: a motor having a rotating shaft that rotates about a first axis; an output shaft configured to output power to the outside of the driving device; a transmission assembly, one end of which is connected to the rotating shaft and the other end is connected to the output shaft to transmit the power of the motor to the output shaft. The transmission assembly includes a worm that rotates about a worm axis, the first axis is parallel to the worm axis, and the worm is coupled to the rotating shaft; wherein, the transmission assembly includes a first gear mounted on the rotating shaft, the first gear rotates together with the rotating shaft, the worm has a gear portion, and the gear portion meshes with the first gear.

[0005] According to this solution, the rotating shaft of the motor is arranged parallel to the worm, which improves the space utilization rate and is easy for wiring. In addition, by setting the first gear, the worm is not directly connected to the rotating shaft of the motor, avoiding damage to the rotating shaft of the motor caused by the axial force of the worm.

[0006] In some solutions, the transmission assembly may further include a second gear, the worm has a worm portion, and the worm portion forms a worm and worm gear engagement with the second gear.

[0007] In some solutions, the second gear may rotate about a second axis, the second axis is perpendicular to the first axis, and the second gear is located on a side of the worm facing the rotating shaft.

[0008] According to this solution, the worm and the second gear are arranged radially centered with respect to the rotating shaft of the motor, making full use of the space on both radial sides of the rotating shaft of the motor, which is beneficial to the miniaturization of the driving device.

[0009] In some solutions, the tooth surface of the gear portion may be inclined with respect to the first axis, and the transmission assembly is configured such that in the direction of the worm axis, the force exerted by the first gear on the gear portion is opposite to the force exerted by the second gear on the worm portion.

[0010] According to this solution, the force exerted by the first gear on the gear part and the force exerted by the second gear on the worm part cancel each other out in the direction of the worm axis, thereby reducing the axial backlash of the worm and making the operation of the drive device more stable.

[0011] In some solutions, the transmission assembly may further include a third gear and a fourth gear. The third gear rotates around a third axis, and the fourth gear rotates around a fourth axis. Both the third axis and the fourth axis are parallel to the second axis, and the rotation axis of the output shaft is also parallel to the second axis. The third gear meshes with the second gear, the fourth gear meshes with the third gear, and the fourth gear is connected to the output shaft. The power output by the motor is sequentially transmitted to the output shaft via the first gear, the worm, the second gear, the third gear, and the fourth gear.

[0012] In some solutions, the drive device may further include: a first housing, the motor is disposed within the first housing, and the first axis is parallel to the surface of the first housing; a second housing, the transmission assembly is disposed within the second housing; a third housing, the output shaft is disposed within the third housing; screw holes, passing through the first housing, the second housing, and the third housing, and screws pass through the screw holes to fasten the first housing, the second housing, and the third housing together; the first housing, the second housing, and the third housing are sequentially stacked along the direction of the second axis, and the first housing, the second housing, and the third housing together enclose to form the internal space of the drive device.

[0013] According to this solution, any corresponding screw holes of the three housings are coaxially installed with the same screw, which greatly improves the assembly accuracy, reduces the cumulative error, and at the same time improves the connection strength.

[0014] In some solutions, the output shaft may include a first shaft portion and a second shaft portion. The second housing is provided with a first shaft hole and a second shaft hole. The first shaft portion is fitted with the first shaft hole, the second shaft portion is fitted with the second shaft hole, and the second shaft portion is disposed around the first shaft portion.

[0015] According to this solution, the first shaft portion is thinner and has a high cylindricity accuracy, mainly used to control the transmission accuracy. The second shaft portion is thicker and has better structural strength, mainly used to improve the connection strength.

[0016] In some solutions, the drive device may further include a bearing component, the bearing component is disposed around the outer periphery of the worm in the radial direction, and the worm is rotatably connected to the bearing component.

[0017] According to this solution, the bearing component can provide support for the worm, improve the bending resistance of the worm, and ensure the transmission accuracy of the drive device. In addition, the worm is only connected to the bearing component, which improves its assembly accuracy.

[0018] In some embodiments, the worm has two axial ends, and the worm part and the gear part are located between the two axial ends; the bearing component includes a first support part and a second support part. The first support part is arranged around the axial end, and the second support part is arranged around the worm part.

[0019] According to this embodiment, the first support part is used to support the axial end of the worm, and the second support part is used to support the worm part of the worm.

[0020] In some embodiments, the bearing component can be fixed to the first housing and the second housing.

[0021] According to the second aspect of the present disclosure, a toilet unit is provided, including: the driving device according to the first aspect of the present disclosure; a toilet lid rotatably connected to the output shaft. Description of the Drawings

[0022] Figure 1 A schematic diagram of the driving device according to an embodiment of the present disclosure is shown;

[0023] Figure 2 An exploded view of the driving device according to an embodiment of the present disclosure is shown;

[0024] Figure 3 A partial schematic diagram of the driving device according to an embodiment of the present disclosure is shown;

[0025] Figure 4 A schematic diagram of the worm according to an embodiment of the present disclosure is shown;

[0026] Figure 5 A schematic diagram of the second housing according to an embodiment of the present disclosure is shown;

[0027] Figure 6 A schematic diagram of the housing assembly according to an embodiment of the present disclosure is shown;

[0028] Figure 7 A schematic diagram of the output shaft according to an embodiment of the present disclosure is shown.

[0029] Reference Signs:

[0030] 100 Driving Device

[0031] 110 Motor

[0032] 112 Rotating Shaft

[0033] 120 Transmission Assembly

[0034] 122 First Gear

[0035] 124 Second Gear

[0036] 124-1 Second Large Gear

[0037] 124 - 2 Second pinion gear

[0038] 126 Third gear

[0039] 126 - 1 Third large gear

[0040] 126 - 2 Third pinion gear

[0041] 128 Fourth gear

[0042] 130 Worm

[0043] 134 Worm part

[0044] 136 Gear part

[0045] 137 Tooth surface

[0046] 140 Output shaft

[0047] 142 First shaft part

[0048] 144 Second shaft part

[0049] 162 First housing

[0050] 164 Second housing

[0051] 165 - 1 First shaft hole

[0052] 165 - 2 Second shaft hole

[0053] 166 Third housing

[0054] 167 Screw hole

[0055] 168 Screw Detailed implementation manners

[0056] In order to make the objectives, solutions, and advantages of the technical solutions of the present disclosure clearer, the technical solutions of the embodiments of the present disclosure will be clearly and completely described below with reference to the accompanying drawings of the specific embodiments of the present disclosure. Unless otherwise specified, the terms used herein have the ordinary meanings in the art. The same reference numerals in the drawings represent the same components.

[0057] Figure 1FIG. 0 shows a schematic diagram of a drive device 100 according to an embodiment of the present disclosure. The drive device 100 is configured to output power to the outside and can be used, for example, to drive the opening or closing of a toilet lid of a toilet unit. The drive device 100 mainly includes a motor 110, a transmission assembly 120, and an output shaft 140. The motor 110 has a rotating shaft 112 that rotates about a first axis. One end of the transmission assembly 120 is connected to the rotating shaft 112, and the other end is connected to the output shaft 140 to transmit the power of the motor 110 to the output shaft 140, and then output the power to the outside through the output shaft 140. For example, the output shaft 140 is connected to the toilet lid, and the rotation of the output shaft 140 drives the rotation of the toilet lid, so that the drive device 100 controls the opening or closing of the toilet lid. In order to obtain a large transmission ratio in a small space, the transmission assembly 120 includes a worm 130 that rotates about a worm axis.

[0058] When the user manually operates the toilet lid, it may cause a large axial force on the worm 130 of the drive device 100. If the worm 130 is directly connected to the rotating shaft 112 of the motor 110, the axial force received by the worm 130 directly acts on the rotating shaft 112 of the motor 110, resulting in a decrease in the life of the motor 110 and even possible damage to the motor 110. For this reason, as Figure 3 shown, the drive device 100 further includes a first gear 122 mounted on the rotating shaft 112. The first gear 122 rotates together with the rotating shaft 112. The worm 130 has a gear portion 136 that meshes with the first gear 122. By arranging the first gear 122 between the worm 130 and the rotating shaft 112, the worm 130 does not directly apply a force to the rotating shaft 112, avoiding damage to the motor 110 caused by the axial force of the worm 130. Although in this arrangement, the first gear 122 applies a force to the rotating shaft 112, the component of the force applied by the first gear 122 is mainly a radial force, rather than an axial force. Therefore, its influence on the rotating shaft 112 is small.

[0059] Specifically, the transmission assembly may further include a second gear 124. The worm 130 has a worm portion 134, and the worm portion 134 and the second gear 124 form a worm and worm wheel meshing. The second gear 124 can rotate about a second axis, and the second axis is perpendicular to the first axis. Preferably, the first axis is parallel to the worm axis, and the second gear 124 is located on the side of the worm 130 facing the rotating shaft 112. Compared with the inclined arrangement of the motor 110, the parallel arrangement of the rotating shaft 112 of the motor 110 and the worm 130 is more regular, which is conducive to improving the assembly accuracy and wiring. At the same time, the regular arrangement makes the gap distribution between the side wall of the motor 110 and the housing uniform, so that the screws for fixing the motor 110 can also be evenly distributed accordingly, improving the connection strength. In addition, the worm 130 and the second gear 124 are arranged radially centered with respect to the rotating shaft 112 of the motor 110, making full use of the space on both radial sides of the rotating shaft 112 of the motor 110, which is beneficial to the miniaturization of the driving device 100. It should be noted that although the present disclosure adds the first gear 122, the presence of the first gear 122 does not increase the volume of the driving device 100. On the contrary, the first gear 122 enables the worm axis of the worm 130 to be at a certain distance from the first axis of the motor 110, and then the second gear 124 is arranged on the other side of the worm 130 with respect to the first axis, making full use of the space on both sides of the motor 110. In contrast, if there is no first gear 122 and the rotating shaft 112 of the motor 110 is directly connected to the worm 130, then there must be no transmission components arranged on one side of the motor 110, wasting space and making the driving device 100 larger in volume.

[0060] Preferably, as Figure 4 shown, the tooth surface 137 of the gear portion 136 can be inclined with respect to the first axis, and the transmission assembly 120 is configured such that in the direction of the worm axis, the force exerted by the first gear 122 on the gear portion 136 of the worm 130 and the force exerted by the second gear 124 on the worm portion 134 of the worm 130 are in opposite directions. For example, as Figure 4 shown, the direction of the force exerted by the first gear 122 on the gear portion 136 of the worm 130 is to the right, and the direction of the force exerted by the second gear 124 on the worm portion 134 of the worm 130 is to the left. In this way, the force exerted by the first gear 122 on the gear portion 136 of the worm 130 and the force exerted by the second gear 124 on the worm portion 134 of the worm 130 cancel each other out in the direction of the worm axis, thereby reducing the axial backlash force of the worm 130 and making the operation of the driving device 100 more stable. In other words, in general, the axial component force of a helical gear is an undesired loss force, but in the present disclosure, the axial force of the helical gear (the first gear 122) is used to cancel the axial backlash force of the worm 130.

[0061] Preferably, as Figure 2As shown, the transmission assembly 120 may further include a third gear 126 and a fourth gear 128. The third gear 126 rotates about a third axis, and the fourth gear 128 rotates about a fourth axis. Both the third axis 126 and the fourth axis 128 are parallel to the second axis, and the rotation axis of the output shaft 140 is also parallel to the second axis. The third gear 126 meshes with the second gear 124, the fourth gear 128 meshes with the third gear 126, and the fourth gear 128 is connected to the output shaft 140. The power output by the motor 110 is sequentially transmitted to the output shaft 140 via the first gear 122, the worm 130, the second gear 124, the third gear 126, and the fourth gear 128.

[0062] Specifically, the second gear 124 includes a second large gear 124-1 and a second small gear 124-2. The radius of the second large gear 124-1 is greater than the radius of the second small gear 124-2. The second large gear 124-1 and the second small gear 124-2 rotate synchronously about the second axis. The second large gear 124-1 meshes with the worm portion 134 of the worm 130 in the form of a worm and worm gear, and the second small gear 124-2 meshes with the third gear 126. The third gear 126 includes a third large gear 126-1 and a third small gear 126-2. The radius of the third large gear 126-1 is greater than the radius of the third small gear 126-2. The third large gear 126-1 and the third small gear 126-2 rotate synchronously about the third axis. The third large gear 126-1 meshes with the second small gear 124-2, and the third small gear 126-2 meshes with the fourth gear 128.

[0063] Preferably, as Figure 5 and Figure 6As shown, the driving device 100 may further include a first housing 162, a second housing 164, and a third housing 166. The first housing 162, the second housing 164, and the third housing 166 are stacked in sequence along the direction of the second axis. The first housing 162, the second housing 164, and the third housing 166 together enclose to form the internal space of the driving device 100. The motor 110 is disposed within the first housing 162, and the first axis is parallel to the surface of the first housing 162. The transmission assembly 120 is disposed within the second housing 164, and the output shaft 140 is disposed within the third housing 166. Screw holes 167 penetrate through the first housing 162, the second housing 164, and the third housing 166, and screws 168 pass through the screw holes 167 to fasten the first housing 162, the second housing 164, and the third housing 166 together. Any corresponding screw holes 167 of the three housings are coaxially installed with the same screw 168, greatly improving the assembly accuracy, reducing the cumulative error, and at the same time improving the connection strength. In addition, the motor 110 is placed parallel to the first housing 162, making the arrangement of the motor 110 more regular, which means that the assembly accuracy of the motor 110 can be improved, and it is also easier to route wires. At the same time, it is also convenient to set screw holes for fastening the motor 110, improving the connection strength between the motor 110 and the first housing 162.

[0064] Preferably, as Figure 7 shown, the output shaft 140 may include a first shaft portion 142 and a second shaft portion 144. The second housing 164 is provided with a first shaft hole 165-1 and a second shaft hole 165-2. The first shaft portion 142 cooperates with the first shaft hole 165-1, and the second shaft portion 144 cooperates with the second shaft hole 165-2. The second shaft portion 144 is disposed around the first shaft portion 142. According to the above arrangement, the first shaft portion 142 is thinner and has a high cylindricity accuracy, mainly used for controlling the transmission accuracy. The second shaft portion 144 is thicker and has better structural strength, mainly used for improving the connection strength.

[0065] Preferably, the driving device 100 may further include a bearing component. The bearing component is disposed around the outer periphery of the worm 130, and the worm 130 is rotatably connected to the bearing component. The bearing component can provide support for the worm 130, improve the bending resistance of the worm 130, and ensure the transmission accuracy of the driving device 100. In addition, the worm 130 is only connected to the bearing component, improving its assembly accuracy. For example, the bearing component can be fixed to the first housing 162 and the second housing 164. In addition, the worm 130 may have two axial ends, and the worm portion 134 and the gear portion 136 are located between the two axial ends. The bearing component includes a first support portion and a second support portion. The first support portion is disposed around the axial end, and the second support portion is disposed around the worm portion 134. In this way, the first support portion is used to support the axial end of the worm 130, and the second support portion is used to support the worm portion 134 of the worm 130.

[0066] The present disclosure has been described in detail with reference to preferred embodiments. However, those skilled in the art can understand that various modifications and variations can be made to the above specific embodiments without departing from the concept of the present disclosure. Various technical features and structures proposed by the present disclosure can also be combined without exceeding the protection scope of the present disclosure. The protection scope of the present disclosure is determined by the appended claims.

Claims

1. A driving device, characterized in that, Comprising: A motor having a rotating shaft that rotates about a first axis; An output shaft configured to output power to the outside of the drive device; A transmission assembly having one end connected to the rotating shaft and the other end connected to the output shaft to transmit the power of the motor to the output shaft. The transmission assembly includes a worm that rotates about a worm axis, the first axis being parallel to the worm axis, and the worm being coupled to the rotating shaft; Wherein the transmission assembly includes a first gear mounted on the rotating shaft, the first gear rotating together with the rotating shaft, the worm having a gear portion that meshes with the first gear, And wherein the tooth surface of the gear portion is inclined with respect to the first axis, and the transmission assembly is configured such that in the direction of the worm axis, the force exerted by the first gear on the gear portion is opposite in direction to the force exerted by a second gear on the worm portion.

2. The drive device according to claim 1, characterized in that, The transmission assembly further includes a second gear, the worm having a worm portion that forms a worm and worm gear engagement with the second gear.

3. The drive device according to claim 2, characterized in that, The second gear rotates about a second axis that is perpendicular to the first axis, and the second gear is located on a side of the worm facing the rotating shaft.

4. The drive device according to claim 3, characterized in that, The transmission assembly further includes a third gear and a fourth gear, the third gear rotating about a third axis and the fourth gear rotating about a fourth axis, both the third axis and the fourth axis being parallel to the second axis, and the axis of rotation of the output shaft also being parallel to the second axis; The third gear meshes with the second gear, the fourth gear meshes with the third gear, and the fourth gear is connected to the output shaft. The power output by the motor is sequentially transmitted to the output shaft via the first gear, the worm, the second gear, the third gear, and the fourth gear.

5. The drive device according to claim 4, characterized in that Further comprising: A first housing in which the motor is disposed, the first axis being parallel to the surface of the first housing; A second housing in which the transmission assembly is disposed; A third housing in which the output shaft is disposed; Screw holes passing through the first housing, the second housing, and the third housing, and screws passing through the screw holes to fasten the first housing, the second housing, and the third housing together; The first housing, the second housing, and the third housing are sequentially stacked in the direction of the second axis, and the first housing, the second housing, and the third housing together enclose an internal space of the drive device.

6. The drive device according to claim 5, characterized in that, The output shaft includes a first shaft portion and a second shaft portion. The second housing is provided with a first shaft hole and a second shaft hole. The first shaft portion is fitted with the first shaft hole, the second shaft portion is fitted with the second shaft hole, and the second shaft portion is disposed around the first shaft portion.

7. The drive device according to claim 5, characterized in that, Further comprising a bearing member disposed around the outer periphery of the worm in the radial direction, and the worm is rotatably connected to the bearing member.

8. The drive device according to claim 7, wherein, The worm has two axial ends, and the worm part and the gear part are located between the two axial ends; The bearing component includes a first support part and a second support part. The first support part is arranged around the axial end, and the second support part is arranged around the worm part.

9. The drive device according to claim 7, characterized in that, The bearing component is fixed to the first housing and the second housing.

10. A toilet unit, characterized in that, Comprising: The drive device according to any one of claims 1 to 9; A toilet lid rotatably connected to the output shaft.

Images