TWI679148B - In-wheel motor - Google Patents

Abstract

A hub motor includes: a first frame body; a drive motor, which is installed on the first side of the first frame body, includes a driving shaft, and makes the driving shaft pass through the second side of the first frame body and A driving gear is rotated in rotation; a second frame body; and a plurality of transmission gears are respectively pivoted between the second side of the first frame body and the second frame body, and each of the transmission gears includes a large gear portion and a small gear, respectively. A gear wheel that meshes with the drive gear; a linkage wheel that contains an internal gear portion that meshes with the small gear portion of each of the transmission gears; a wheel housing group consisting of a first wheel housing and a second wheel housing The first frame and the second frame are covered together, and the wheel housing group is meshed with the linkage wheel. The outer edge of the first frame is provided with an oil retaining flange, so that each The large gear portion of the transmission gear can move within the range surrounded by the oil-retaining flange portion, so as to block the lubricating oil splashing outward due to centrifugation, so that the new model can obtain sufficient lubrication during operation to increase the use. Life and reduce noise.

Description

In-wheel motor

The present invention relates to an in-wheel motor, and more particularly to an in-wheel motor that can return lubricating oil to various transmission locations.

Currently used in wheel motors for electric scooters and bicycles, as shown in TWM390917 or CN1702015A, all use planetary gear transmission mechanisms. However, in the above-mentioned wheel hub motor structure, there is no proper structure to maintain lubricant. Therefore, after long-term use, lubricating oil often loses a large amount; as shown in Figure 1, it includes: the first frame (81); the second frame (82); most transmission gears (83) are pivotally mounted on the first Between a frame body (81) and a second frame body (82), each of the transmission gears (83) contains a large gear portion (831) and a small gear portion (832), so that the large gear portion (831) ) Is a driving gear (832) to drive rotation; a linkage wheel (84) contains an internal gear portion (841), which meshes with the small gear portion (832) of each transmission gear (83), and each of the small gear portions (832) ), And a wheel housing (85) is pivotally mounted on the first and second frame bodies (81, 82), and rotates in conjunction with the linkage wheel (84).

The power of the conventional hub motor is transmitted by the transmission gear (83) to the linkage wheel (84). Because it is a transmission mode between gears and gears, it must be properly lubricated to avoid wear. In addition, the noise during transmission can also be reduced; however, as shown in FIG. 1, the outer edge of the large gear part (831) in each of the transmission gears (83) often exceeds the outer edge of the first frame (81). When running at high speed, the lubricant will splash outward due to centrifugal action, most of the lubricant will flow outward along the first frame (81) in the direction of arrow (a), and only a small part of the lubricant will flow back. Each of the transmission gears (83), similarly, as shown in FIG. 1, when the pinion portion (832) rotates the linkage wheel (84) at high speed, the outer diameter of the second frame (82) does not include the cover. The internal gear part (841) of the linkage wheel (84) is within its range, so part of the lubricating oil will also drain outward in the direction of the arrow (b). Therefore, after long-term use, the conventional wheel hub motor is often used for transmission. Lack of proper lubricating oil in the mechanism causes wear of transmission gear (83) or internal gear part (841) of linkage wheel (84) Crack, and easy to produce higher noise.

Furthermore, the conventional wheel hub motors, in which the first and second frames (81, 82) are usually locked with most bolts (86) and nuts (87), but this assembly method is time-consuming and inconvenient, Show its shortcomings.

In view of this, the creator of this new model has added research and innovation to reveal the wheel motor shown in this new model.

The purpose of the present invention is to provide a hub motor, comprising: a first frame body; a drive motor, which is arranged on the first side of the first frame body and includes a driving shaft, so that the driving shaft passes out of the first frame body; The second side of the second frame is linked with a driving gear to rotate; the second frame body; most of the transmission gears are each pivotally mounted between the second side of the first frame body and the second frame body, each containing a large gear. And a small gear portion, so that each of the large gear portions is meshed with the driving gear; a linkage wheel containing an internal gear portion is meshed with the small gear portion of each of the transmission gears; and a wheel housing group, The wheel shell and the second wheel shell are combined, and the first and second frame bodies are covered inside, and the wheel shell group is engaged with the outer edge of the linkage wheel, and is rotated accordingly; On the outer edge, a ring is provided with an oil retaining flange portion, so that the large gear portion of each of the transmission gears moves within a range surrounded by the oil retaining flange portion.

The wheel hub motor disclosed in the present invention, wherein the large gear portion and the small gear portion of each of the transmission gears are integrally formed and put on a rotating shaft, so that a first end of the rotating shaft is sleeved with a bearing and placed in the first In a frame, the second end of the rotating shaft is sleeved with a bearing and placed in the second frame.

The hub motor disclosed in the present invention, wherein the large gear portion and the small gear portion of each of the transmission gears are integrally formed, and a shaft portion is protruded axially integrally from the outside of the large and small gear portions, so as to be pivotally provided on Between the first and second frames.

In the wheel motor disclosed in the present invention, each of the shaft parts is respectively sleeved with a bearing so as to be pivotally mounted in the first and second frames.

In the wheel motor disclosed in the present invention, a plurality of gear shafts are provided on the second side of the first frame body to respectively pass through a transmission gear, and a buckle portion is provided at each end of the wheel shaft; the second frame body A plurality of buckle holes are provided for correspondingly buckling a buckle portion of a wheel shaft inside. The above-mentioned buckle part forms a concave part or a protruding tooth; the buckle hole of the second frame body contains a convex part or a concave part for correspondingly buckling the buckle part inside.

According to the disclosed hub motor, the outer diameter of the second frame body is larger than the diameter of the inner gear portion of the linkage wheel.

The wheel hub motor disclosed in the present invention, wherein an inner gear surface of the second wheel shell of the wheel shell group is provided with an internal gear surface to engage the external gear surface provided on the outer edge of the linkage wheel, and drive the linkage wheel to rotate. .

The wheel hub motor disclosed in the present invention, wherein the outer edge of the second wheel shell is embedded or inlaid with a layer of tire skin.

According to the disclosed hub motor, a bearing is interposed between the first wheel housing of the wheel housing group and the first frame body, and a bearing is interposed between the second wheel housing and the second frame body.

The desirable entity of the new model can be made clear by the following description and the accompanying drawings.

As shown in Figures 2-7, the present invention relates to a wheel hub motor, including: a first frame (10); a drive motor (20), mounted on the first side of the first frame (10) ( 10a), including a driving shaft (21), so that the driving shaft (21) penetrates the second side (10b) of the first frame (10) and rotates in conjunction with a driving gear (22); the second frame ( 30); most of the transmission gears (40) are pivotally mounted between the second side (10b) of the first frame body (10) and the second frame body (30), and each of the transmission gears (40) contains a A large gear part (41) and a small gear part (42), so that each of the large gear part (41) is meshed with the driving gear (22); a linkage wheel (50) contains an internal gear part (51), A pinion portion (42) of each of the transmission gears (40) meshes with the transmission; and a wheel housing group (60) is composed of a first wheel housing (61) and a second wheel housing (62) mated to cover the first The first and second frames (10, 30) are inside, and the wheel housing group (60) is engaged with the outer edge (52) of the linkage wheel (50); wherein the outer edge of the first frame (10), The ring is provided with an oil retaining flange portion (11), so that the height (H) of the oil retaining flange portion (11) is larger than the large gear portion (41) of each transmission gear (40) from the The distance (h) of the second side (10b) of the first frame (10) enables the large gear portion (41) of each transmission gear (40) to be bounded by the frame surrounded by the oil retaining flange portion (11). Within movement.

As shown in FIGS. 2 and 4, the wheel motor disclosed in the present invention, wherein the large gear portion (41) and the small gear portion (42) of each transmission gear (40) are integrally formed and put on a rotating shaft (43 ), The first end of the shaft (43) is sleeved with a bearing (43a) and placed in the first frame (10), and the second end of the shaft (43) is sleeved with a bearing (43b) ) And placed in the second frame (30). If so, when the wheel hub motor disclosed in the present invention is in motion, the transmission gear (40) does not rotate on the shaft (43), but rotates in synchronization with the shaft (43). The bearings (43a, 43b) at both ends of the rotating shaft (43) are rotating mechanisms, and the wear occurs at the ends of the bearings (43a, 43b). Because the transmission gears (40) and the rotating shaft (43) of the new model do not occur, The wear can completely improve the shortcomings of the transmission gear (40) on the rotating shaft (43), so that the new model can transmit greater torque, and can also avoid large and small gear parts (41, 42) due to wear and vibration However, it is easy to have the disadvantages of chipping and bursting when running at high speed.

As shown in FIG. 7, the wheel hub motor disclosed in the present invention, wherein the large gear portion (41) and the small gear portion (42) of each of the transmission gears (40) are integrally formed (can be made from plastic or metal materials. The new type is not self-limiting), and a shaft portion (411, 421) is protruded axially integrally from the outside of the large and small gear portions (41, 42), respectively, so as to be pivoted on the first and second frame bodies ( 10, 30). Each of the shaft portions (411, 421) is sleeved with a bearing (43a, 43b) to be pivotally mounted in the first and second frames (10, 30).

As shown in FIGS. 5 and 6, the wheel hub motor disclosed in the present invention is provided with a plurality of gear shafts (12) on the second side (10 b) of the first frame body (10) to pass through a transmission gear ( 40), and the buckle portion (121) is provided at the end of each of the gear shafts (12); the second frame body (30) is provided with a plurality of buckle holes (31) to correspondingly buckle a gear shaft (12) The buckle (121) is inside. The above-mentioned buckle portion (121) forms a concave portion or a protruding tooth; the buckle hole (31) of the second frame body (30) may contain a convex portion or a concave portion to correspondingly buckle the buckle portion (121) Within.

As shown in FIGS. 4, 6 and 7, the hub motor disclosed by the new model, wherein the outer diameter of the second frame body (30) is larger than the diameter of the inner gear portion (51) of the linkage wheel (50), so that The internal gear part (51) of the linkage wheel (50) is covered within its range, and the second frame body (30) is blocked outside the pinion gear part (42) and the internal gear part (51). So that the lubricating oil between the filling and the internal gear portion (51) and the small gear portion (42) is blocked by the second frame body (30), and it is not easy to splash out to ensure that the internal gear portion (51) and In addition to the lubrication between the pinion parts (42), in addition to protecting the parts from wear, it can also reduce noise during high-speed operation.

As shown in Figures 2 and 3, the wheel motor disclosed in the present invention, wherein an inner gear surface (621) is attached to the inner edge of the second wheel shell (62) of the wheel shell group (60) to engage the linkage wheel (50) An external gear surface provided on the outer edge (52) to rotate with the linkage wheel (50). The above-mentioned internal gear surface (621) coincides with the external gear surface provided on the outer edge (52) of the linkage wheel (50), so that the transmission between the linkage wheel (50) and the hub group (60) during transmission can be avoided. The shaking and collision with each other can also reduce the noise during transmission and make the new model quieter at high speeds.

The wheel hub motor disclosed in the present invention, wherein a first wheel shell (61) of the wheel shell group (60) and the first frame body (10) are interposed with bearings (13) and a second wheel shell (62). A bearing (14) is inserted through the second frame body (30), so that the wheel housing group (60) can rotate smoothly. The new wheel shell (60) can be made of PU and plastic, or as shown in FIG. 8, a layer of tire skin (620) is embedded or inlaid on the outer edge of the second wheel shell (62). The new type is not limited to its material.

The in-wheel motor disclosed in the present invention, wherein the driving gear (22), the large gear portion (41), the small gear portion (42), and the internal gear portion (51) form a helical gear, so that the new type can be applied to larger gears. Torque transmission.

As shown in FIG. 4, due to the structure disclosed by the new model, during operation, the lubricating oil filled between the transmission gear (40) and the linkage wheel (50) will splash outward due to centrifugal action, due to the pinion portion (42) It is located on the inner side of the internal gear part (51) of the linkage wheel (50), and its outer side is blocked by the second frame (30), so the lubricant cannot splash outward, and the large gear part (41) is located The first frame body (10) moves within the range surrounded by the oil retaining flange portion (11), so the outwardly splashed lubricant will hit the oil retaining flange portion (11), as shown by arrow A in FIG. 6 Display, and then back to the large gear (41) or small gear (42), no matter what, most of the lubricant will return to the transmission gear (40) and the linkage wheel (50), it is not easy Loss, so the new model can ensure good lubricating effect after long-term use, to extend the service life, and also reduce the noise generated during high-speed rotation, and show its superiority.

The structure and shape disclosed by the new model can be modified and applied without departing from the spirit and scope of the new model. The new model is not limited to the above embodiments.

(10) ‧‧‧First frame

(10a) ‧‧‧First side

(10b) ‧‧‧Second side

(11) ‧‧‧Oil retaining flange

(12) ‧‧‧Gear shaft

(121) ‧‧‧Deduction

(13) ‧‧‧bearing

(14) ‧‧‧bearing

(20) ‧‧‧Drive motor

(21) ‧‧‧Drive shaft

(22) ‧‧‧Drive Gear

(30) ‧‧‧Second frame

(31) ‧‧‧ buttonhole

(40) ‧‧‧Drive gear

(41) ‧‧‧Gear Gear Department

(411) ‧‧‧Shaft

(42) ‧‧‧Pinion gear

(421) ‧‧‧Shaft

(43) ‧‧‧Shaft

(43a) ‧‧‧Bearing

(43b) ‧‧‧Bearing

(50) ‧‧‧Linked wheel

(51) ‧‧‧Internal gear

(52) ‧‧‧Rim

(60) ‧‧‧Wheel shell set

(61) ‧‧‧First round shell

(62) ‧‧‧Second wheel shell

(81) ‧‧‧First Frame

(82) ‧‧‧Second Frame

(83) ‧‧‧Drive Gear

(831) ‧‧‧Gear Gear Department

(832) ‧‧‧Pinion Gear Department

(84) ‧‧‧Linked wheel

(841) ‧‧‧Internal gear

(85) ‧‧‧Wheel shell

(86) ‧‧‧Bolt

(87) ‧‧‧Nut

(H) ‧‧‧height

(h) ‧‧‧Distance

Fig. 1: Schematic diagram of the sectional structure of a conventional hub motor. FIG. 2 is an exploded perspective view of the first embodiment of the present invention. FIG. 3 is a schematic perspective view of the embodiment shown in FIG. 2 and after assembly. FIG. 4 is a schematic cross-sectional structure taken along the direction 4-4 in FIG. 3. FIG. 5 is an exploded perspective view of the second embodiment of the present invention. FIG. 6 is a schematic cross-sectional structure diagram of the embodiment shown in FIG. 5. FIG. 7 is a schematic cross-sectional structure diagram of a third embodiment of the present invention. FIG. 8 is an exploded view showing a tire skin embedded in the outer edge of the new second wheel shell.

Claims (10)

A hub motor includes: a first frame body; a drive motor, which is installed on the first side of the first frame body and includes a drive shaft that causes the drive shaft to pass through the second side of the first frame body and interlock A driving gear rotates; a second frame body; and a plurality of transmission gears, each of which is pivotally mounted between the second side of the first frame body and the second frame body, respectively, including a large gear portion and a small gear portion, Let each of the large gear portions be the driving gear meshing transmission; a linkage wheel including an internal gear portion that meshes with the small gear portion of each of the transmission gears; and a wheel housing group that is mated by the first wheel housing and the second wheel housing It is composed to cover the first and second frames inside, and to make the wheel shell group engage the outer edge of the linkage wheel; wherein the outer edge of the first frame is provided with an oil retaining flange portion, so that each The large gear portion of the transmission gear moves within a range surrounded by the oil retaining flange portion. The wheel hub motor according to claim 1, wherein the large gear portion and the small gear portion of each of the transmission gears are integrally formed and put on a rotating shaft, so that a first end of the rotating shaft is sleeved with a bearing and placed in In the first frame body, a second end of the rotating shaft is sleeved with a bearing and placed in the second frame body. The in-wheel motor according to claim 1, wherein the large gear portion and the small gear portion of each of the transmission gears are integrally formed, and a shaft portion is protruded axially integrally from the outside of the large and small gear portions to pivot Between the first and second frames. The wheel hub motor according to claim 3, wherein each of the shaft portions is respectively sleeved with a bearing to be pivotally mounted in the first and second frames. The wheel hub motor according to claim 1, wherein a plurality of gear shafts are provided on the second side of the first frame body to respectively pass through a transmission gear, and a buckle portion is provided at each end of the gear shaft; The two frame bodies are provided with a plurality of buckle holes for correspondingly buckling a buckle portion of a gear shaft inside. The wheel hub motor according to claim 5, wherein the buckle portion forms a concave portion or a protruding tooth; the buckle hole of the second frame body includes a convex portion or a concave portion to correspondingly buckle the buckle portion inward. The hub motor according to claim 1, wherein an outer diameter of the second frame is larger than an aperture of an internal gear portion of the linkage wheel. The hub motor according to claim 1, wherein an inner gear surface is provided on the inner edge of the second wheel shell of the wheel shell group to engage the outer gear surface provided on the outer edge of the linkage wheel, and the linkage wheel is the linkage wheel. Drive around. The wheel hub motor according to claim 1, wherein a layer of tire skin is embedded or inlaid on the outer edge of the second wheel shell. The in-wheel motor according to claim 1, wherein the driving gear, the large gear portion, the small gear portion, and the internal gear portion form a helical gear.