Gear motor

Abstract

The utility model discloses a gear motor, comprising a driving source comprising a housing, and a stator assembly and a rotor assembly arranged in the housing, the rotor assembly comprising a rotating shaft; the gear train unit is in transmission connection with the rotating shaft; wherein the shell is provided with a convex ring part which extends in the axial direction of the rotating shaft and towards the gear train unit, the convex ring part can define a mounting space used for mounting the gear train unit, and a cover plate is arranged on the end side, away from the shell, of the convex ring part; the output end of the gear train unit can extend to the outer side of a closed space defined by the convex ring part and the cover plate in the axial direction of the rotating shaft.

Description

TECHNICAL FIELD

[0001] The utility model relates to motor technical field, especially a kind of reduction motor. BACKGROUND

[0002] Reduction motor is the abbreviation of motor and reducer, with the characteristics of small size, light weight, high efficiency.The prior art, motor and reducer are provided with their own shell, thereby causing the overall size of reduction motor is larger, not conducive to the miniaturization of reduction motor.Therefore, it is necessary to improve the prior art to overcome the defects in the prior art. SUMMARY

[0003] The utility model discloses a kind of reduction motors which are beneficial to reduce overall size.

[0004] The utility model discloses a kind of reduction motors which are beneficial to reduce overall size.

[0005] A kind of reduction motor, comprising: drive source, including shell, stator assembly and rotor assembly in the shell are arranged, the rotor assembly includes shaft;Gear train unit is transmission connection with the shaft;Wherein, the shell has the convex ring portion along the axial direction of the shaft and extends towards the gear train unit, the convex ring portion can be surrounded to form the mounting space for installing the gear train unit, the end side of the convex ring portion away from the shell is provided with cover plate, the output end of the gear train unit can extend to the outside of the closed space by the convex ring portion and the cover plate surrounded to the axial direction of the shaft.

[0006] Preferably, the shell is divided into two parts in the axial direction, including first shell part and second shell part, wherein the convex ring portion is fixed to one of the first shell part and the second shell part.

[0007] Preferably, the convex ring portion is integrally formed with one of the first shell part and the second shell part.

[0008] Preferably, the first end of the convex ring portion is formed with a cooling chamber inside the shell, and the first end is provided with a plurality of heat dissipation portions protruding outward along the axial direction of the shaft, and the heat dissipation portions are configured to increase the heat dissipation outer surface area of the cooling chamber.

[0009] Preferably, the gear train unit is a planetary gear train, including a sun gear connected to the shaft, a plurality of planet gears meshing with the sun gear, a planet carrier provided with the planet gears, and a ring gear located outside the planet carrier and meshing with the planet gears, wherein the ring gear is fixed in the convex ring portion, one of the outer peripheral wall of the ring gear and the inner ring of the convex ring portion is provided with a plurality of axial ribs, and the other is provided with a rib groove matched with the ribs, and the ribs are distributed in the circumferential direction.

[0010] Preferably, the planet wheel is arranged on the planet carrier through a pin shaft, and a first bearing is arranged between the pin shaft and the planet wheel; wherein at least one side outer end surface of the planet carrier is provided with an oil guide structure, each pin shaft is provided with a liquid passage for connecting the oil guide structure and the first bearing, and the oil guide structure is configured to guide the lubricating oil in the closed space into the liquid passage during rotation of the planet carrier.

[0011] Preferably, the oil guide structure at least comprises a groove distributed in the circumferential direction, and the groove is communicated with the liquid passage.

[0012] Preferably, the oil guide structure is a groove recessed on the outer end surface of the planet carrier; or,

[0013] The oil guide structure is a flow guide member provided on the outer end surface of the planet carrier and having a groove.

[0014] Preferably, the flow guide member is in the shape of a ring, and the inner ring of the flow guide member is radially recessed to form the groove; wherein the end surface of the flow guide member close to the planet carrier is provided with a plug-in post, the planet carrier is provided with a plug hole matched with the plug-in post, and the flow guide member is detachably arranged on the planet carrier through the matching between the plug-in post and the plug hole.

[0015] The end surface of the flow guide member close to the planet carrier is further provided with a ring guide post communicated with the groove, the pin shaft has a central hole extending in the axial direction, the ring guide post is at least partially inserted into the central hole, the hole wall of the central hole is provided with a communication hole extending in the radial direction thereof, and the central hole and the communication hole constitute the liquid passage.

[0016] Preferably, the flow guide member comprises a first pad plate provided with the plug-in post and the ring guide post, a second pad plate opposite to the first pad plate, and a side wall plate connecting the first pad plate and the second pad plate, the first pad plate and the second pad plate are distributed perpendicular to the axial direction, the side wall plate is peripherally arranged at the outer edge of the first pad plate and the second pad plate, the plug-in post and the ring guide post are arranged on the first pad plate, and a protruding part is formed on the side wall plate corresponding to the ring guide post and protruding radially outward.

[0017] Compared with the prior art, the utility model has the following beneficial effects:

[0018] In the utility model, the shell and the cover plate of the driving source form the outer shell of the gear train unit, that is to say, the gear train unit does not have a separate outer shell, and shares part of the outer shell with the driving source, so that the overall size of the speed reducer motor can be reduced, and the miniaturization of the speed reducer motor structure is facilitated. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 is a three-dimensional structure schematic diagram of the speed reduction motor provided by the utility model.

[0020] Figure 2 is Figure 1 a schematic diagram of the exploded structure.

[0021] Figure 3 is Figure 1 a schematic diagram of the cross-sectional structure.

[0022] Figure 4 is a schematic diagram of the positional relationship between the shell and the convex ring part.

[0023] Figure 5 is a three-dimensional structure schematic diagram of the gear train unit.

[0024] Figure 6 is a schematic diagram of the positional relationship between the sun gear, the planet wheel and the planet carrier at the first visual angle.

[0025] Figure 7 is a schematic diagram of the positional relationship between the sun gear, the planet wheel and the planet carrier at the second visual angle.

[0026] Figure 8 is Figure 7 a schematic diagram of the cross-sectional structure.

[0027] Figure 9 is Figure 8 an enlarged structure schematic diagram of the A area in

[0028] Figure 10 is a schematic diagram of the groove being directly recessed in the planet carrier.

[0029] Figure 11 is a three-dimensional structure schematic diagram of the flow guide.

[0030] Figure 12 is Figure 11 a schematic diagram of the cross-sectional structure.

[0031] Figure 13 is a three-dimensional structure schematic diagram of the planet carrier.

[0032] Figure 14 is a schematic diagram of the flow guide in the front view direction. DETAILED DESCRIPTION

[0033] In order to make the above objectives, characteristics and advantages of the present application more obvious and easy to understand, the specific embodiments of the present application are described in detail below with reference to the drawings. It can be understood that the specific embodiments described herein are only used to explain the present application, but not to limit the present application. In addition, it should be noted that, for the purpose of description, only the parts related to the present application are shown in the drawings, not all the structures. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0034] The terms "comprising" and "having" and any variations thereof in the present application are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device including a series of steps or units is not limited to the listed steps or units, but optionally also includes steps or units not listed, or optionally also includes other steps or units inherent to these processes, methods, products or devices.

[0035] In this paper, the "embodiment" means that the specific features, structures or characteristics described in conjunction with the embodiment can be included in at least one embodiment of the present application. The phrase appears at various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment to other embodiments. Those skilled in the art explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.

[0036] As Figures 1 to 4 The utility model provides a speed reducer motor, the speed reducer motor includes drive source, gear train unit 200 and apron 300. Among them, drive source is power output part, in an embodiment, drive source is motor. Specifically, drive source includes casing 100, stator assembly (figure not shown) and rotor assembly (figure not shown) in casing 100 are equipped. Among them, rotor assembly includes shaft 110, and shaft 110 is equipped in casing 100 through bearing (figure not shown), and shaft 110 can rotate relative to casing 100. The part of shaft 110 extends from the inside of casing 100 to the outside of casing 100 to form the output end of shaft 110. Casing 100 is equipped with the through hole for the wear of shaft 110, and shaft 110 extends to the outside of casing 100 through the through hole. It is worth noting that the axial, radial and circumferential direction appearing in the present specification are with shaft 110 as reference datum, that is to say, the axial, radial and circumferential direction are the axial, radial and circumferential direction of shaft 110.

[0037] Gear train unit 200 is transmission connection with the output end of shaft 110, and the rotary drive of drive source output is transmitted to gear train unit 200 through shaft 110, and is transmitted to the executing member (figure not shown) after the speed reduction of gear train unit 200. As Figure 4As shown, the housing 100 has a convex ring portion 120 extending along the axial direction of the rotation shaft 110 and towards the gear train unit 200, which can surround to form a mounting space for mounting the gear train unit 200. The convex ring portion 120 is provided with a cover plate 300 at the end side away from the housing 100, and the output end of the gear train unit 200 can extend to the outside of the closed space surrounded by the convex ring portion 120 and the cover plate 300 along the axial direction of the rotation shaft 110. In this embodiment, the housing 100 and the cover plate 300 of the driving source surround to form the outer shell of the gear train unit 200, that is, the gear train unit 200 does not have a separate outer shell, and shares part of the outer shell with the driving source, thereby reducing the overall size of the speed reducer motor and facilitating the miniaturization of the speed reducer motor. It is worth noting that the form of the cover plate 300 is not limited, and the cover plate 300 can also be part of other housing parts adjacent to the housing 100, thereby minimizing the size of the speed reducer motor and making the overall structure compact and small.

[0038] Considering the convenience of installation, the housing 100 is divided into two parts in the axial direction. In the axial direction, the housing 100 can be divided into two parts, or three parts, or other number, which can be determined according to actual use.

[0039] Preferably, the housing 100 is divided into two parts in the axial direction, including a first shell portion 101 and a second shell portion 102. The convex ring portion 120 is fixed to one of the first shell portion 101 and the second shell portion 102, wherein the convex ring portion 120 is integrally formed with one of the first shell portion 101 and the second shell portion 102, and the integrally formed manner can simplify the assembly steps and facilitate installation.

[0040] In order to facilitate the cooling of the stator assembly and the rotor assembly inside the driving source, a cooling chamber (not shown) is provided in the housing 100, which is preferably provided at both ends of the housing 100. The cooling chamber is used to introduce liquid cooling medium, which can be water, oil, etc. After the relatively cold liquid cooling medium enters the cooling chamber, it can carry away part of the heat in the housing 100 through heat conduction principle, thereby achieving the purpose of cooling.

[0041] In order to realize the cooling of the driving source while also cooling the gear train unit 200, the first end portion of the housing 100 provided with the convex ring portion 120 is internally formed with a cooling chamber, and the first end portion is provided with a plurality of heat dissipation portions 130 protruding outward along the axial direction of the rotation shaft 110. The heat dissipation portions 130 serve to increase the heat dissipation outer surface area of the cooling chamber, thereby achieving the purpose of effectively cooling the gear train unit 200. One end of the heat dissipation portion 130 is fixed to the first end portion of the housing 100, and the opposite end portion approaches the gear train unit 200 without contact, thereby facilitating the removal of heat from the gear train unit 200.

[0042] The heat dissipation part 130 is in the shape of a cylinder, and the axial dimension of the heat dissipation part 130 is small. The size of the heat dissipation part 130 is determined by the size of the empty space in the closed space where the gear train unit 200 is located. When the empty space is large, the size of the heat dissipation part 130 is relatively large; when the empty space is small, the size of the heat dissipation part 130 is relatively small. There are a plurality of heat dissipation parts 130, and the axial dimensions of the plurality of heat dissipation parts 130 can be different and can be specifically set according to the empty space. For example, the axial dimension of the heat dissipation part 130 at a place where the empty space is large can be larger, and the axial dimension of the heat dissipation part 130 at a place where the empty space is small can be smaller. In this way, the heat dissipation parts 130 are distributed in a staggered manner.

[0043] The gear train unit 200 can be a gear set formed by a plurality of gears meshing, can be a worm gear, can be a planetary gear train, can be a combination of a worm gear and a planetary gear train, or can be a combination of a gear set and a worm gear. Hereinafter, the gear train unit 200 is taken as an example of a planetary gear train.

[0044] As shown in Figures 5 to 9 , the gear train unit 200 includes a sun gear 210 connected to the rotating shaft 110, a plurality of planet gears 220 meshing with the sun gear 210, a planet carrier 230 provided with the planet gears 220, and a ring gear 240 located at the outer circle of the planet carrier 230 and meshing with the planet gears 220. The ring gear 240 is fixedly arranged in the convex ring part 120 by means of gluing, welding, interference fit, etc.

[0045] In order to facilitate the alignment and installation between the ring gear 240 and the convex ring part 120, as shown in Figure 4 and Figure 5 , one of the outer peripheral wall of the ring gear 240 and the inner circle of the convex ring part 120 is provided with a plurality of ribs 121 extending in the axial direction, and the other is provided with a plurality of grooves 122 matched with the ribs 121, and the ribs 121 and the grooves 122 are one-to-one corresponding. Considering the convenience of processing, the ribs 121 are arranged on the outer peripheral wall of the ring gear 240, and the grooves 122 are arranged on the inner circle of the convex ring part 120. Among them, the ribs 121 are distributed at intervals in the circumferential direction of the ring gear 240, and the grooves 122 are distributed at intervals in the circumferential direction of the convex ring part 120.

[0046] The closed space surrounded by the convex ring part 120 and the cover plate 300 is provided with lubricating oil (not shown in the figure). The function of the lubricating oil is to lubricate the bearings in the gear train unit 200, so as to ensure the reliable and stable operation of the gear train unit 200 and prolong the service life of the gear train unit 200.

[0047] In the embodiment, the at least one outer end surface of the planet carrier 230 is provided with an oil guiding structure. The oil guiding structure is configured to guide the lubricating oil to the first bearing 260 at the planet wheel 220 during rotation of the planet carrier 230. The "outer end surface" refers to an outer surface perpendicular to the axial direction.

[0048] Specifically, the planet wheel 220 is arranged on the planet carrier 230 through the pin shaft 250, and the first bearing 260 is arranged between the planet wheel 220 and the pin shaft 250. Each pin shaft 250 is provided with a liquid passage for connecting the oil guiding structure and the first bearing 260. The oil guiding structure can guide the lubricating oil in the closed space to the liquid passage during rotation of the planet carrier 230.

[0049] The oil guiding structure includes at least a groove 400 arranged in the circumferential direction. The groove 400 is connected to the liquid passage of the pin shaft 250. Thus, after the lubricating oil enters the groove 400, the lubricating oil can enter the first bearing 260 through the liquid passage of the pin shaft 250, thereby lubricating the first bearing 260.

[0050] In an embodiment, as shown in Figure 10 , the oil guiding structure is a groove 400 arranged on the outer end surface of the planet carrier 230. The liquid level of the lubricating oil in the closed space is higher than the bottom of the groove 400. Thus, when the planet carrier 230 rotates, the lubricating oil at the bottom of the groove 400 can enter the liquid passage of the pin shaft 250 along the groove 400, and finally flow into the first bearing 260.

[0051] In another embodiment, as shown in Figure 7 and Figure 8 , the oil guiding structure is a flow guide 500 arranged on the outer end surface of the planet carrier 230 and having a groove 400. The flow guide 500 is in the shape of a ring, and the inner circle of the flow guide 500 is radially recessed to form the groove 400.

[0052] The flow guide 500 is detachably arranged on the planet carrier 230. Specifically, as shown in Figures 11 to 13 , the flow guide 500 is provided with a plug column 510 near the end surface of the planet carrier 230, and the planet carrier 230 is provided with a plug hole 231 matched with the plug column 510. The flow guide 500 is detachably arranged on the planet carrier 230 through the matching between the plug column 510 and the plug hole 231.

[0053] Specifically, the circumferential side of the end 511 of the plug post 510 is a conical surface, and the outer diameter of the conical surface gradually decreases in the direction of the plug post 510 being mounted to the planet carrier 230, thereby facilitating the insertion of the plug post 510 into the insertion hole 231. Further, the plug post 510 is further provided with an axially extending groove 512, and the groove 512 is provided with an opening at the end 511 of the plug post 510. During the insertion of the plug post 510 into the insertion hole 231, the plug post 510 has a tendency to be deflected towards the center thereof due to the presence of the groove 512, that is, the plug post 510 can be deformed to facilitate the insertion thereof into the insertion hole 231. Similarly, when it is necessary to remove the flow guide 500 from the planet carrier 230, the plug post 510 can be deformed under the action of an external force to be smoothly pulled out of the insertion hole 231.

[0054] Further, as shown in Figure 12 , the flow guide 500 comprises a first pad plate 501 provided with the plug post 510 and the ring post 520, a second pad plate 502 opposite to the first pad plate 501, and a side plate 503 connecting the first pad plate 501 and the second pad plate 502. The first pad plate 501 and the second pad plate 502 are substantially annular and are perpendicular to the axial direction. The side plate 503 is circumferentially arranged at the outer edge of the first pad plate 501 and the second pad plate 502. The plug post 510 is arranged on the first pad plate 501.

[0055] The first pad plate 501 is further provided with the ring post 520 which is in communication with the groove 400, and the ring post 520 is located on the end surface of the flow guide 500 close to the planet carrier 230. As shown in Figure 8 and Figure 9 , the pin shaft 250 has a central hole 251 extending in the axial direction, and the ring post 520 is at least partially inserted into the central hole 251. The hole wall of the central hole 251 is provided with a communication hole 252 extending in the radial direction thereof. The outer circle of the ring post 520 is in close contact with the inner circle of the central hole 251, thereby avoiding the leakage of lubricating oil introduced by the ring post 520 through the gap between the ring post 520 and the central hole 251. The ring post 520 is spaced apart from the communication hole 252 in the axial direction to avoid the blocking of the communication hole 252 by the ring post 520 while ensuring that sufficient lubricating liquid enters the communication hole 252. The central hole 251 and the communication hole 252 constitute the above-mentioned liquid passage.

[0056] In order to facilitate the lubricating liquid in the groove 400 to enter the ring post 520, as shown in Figure 14 , the side plate 503 is provided with a protruding portion 504 radially outward at the position corresponding to the ring post 520. The outward protruding protruding portion 504 can converge the lubricating liquid and has the function of temporarily storing the lubricating liquid, thereby facilitating the lubricating liquid in the groove 400 to enter the ring post 520.

[0057] In the embodiment, the gear train unit 200 further comprises a connecting shaft 270, the connecting shaft 270 is connected with the planet carrier 230, the planet carrier 230 drives the connecting shaft 270 to rotate synchronously. Wherein, as shown in Figure 3 the planet carrier 230 is supported on the housing 100 through a second bearing 600 at one end, and is supported on the housing 100 through a third bearing 700 at the other end. The connecting shaft 270 is arranged through the cover plate 300, and the cover plate 300 is provided with a cover plate opening 310 matched with the connecting shaft 270.

[0058] The above is only the embodiment of the application, and does not limit the patent scope of the application, and any equivalent structure or equivalent process transformation using the content of the application specification and drawings, or direct or indirect application in other related technical fields, are also included in the patent protection scope of the application.

Claims

1. A reduction motor characterized by, The application relates to a driving source, comprising a housing (100), a stator assembly and a rotor assembly arranged in the housing (100), wherein the rotor assembly comprises a rotating shaft (110); a gear train unit (200) in transmission connection with the rotating shaft (110); wherein the housing (100) has a convex ring part (120) extending along the axial direction of the rotating shaft (110) and towards the gear train unit (200), the convex ring part (120) can surround to form a mounting space for mounting the gear train unit (200), the end side of the convex ring part (120) away from the housing (100) is provided with a cover plate (300), and the output end of the gear train unit (200) can extend to the outside of a closed space formed by the convex ring part (120) and the cover plate (300) along the axial direction of the rotating shaft (110). The housing (100) is arranged in the axial direction and comprises a first housing part (101) and a second housing part (102), wherein the convex ring part (120) is fixed to one of the first housing part (101) and the second housing part (102). The convex ring part (120) is integrally formed with one of the first housing part (101) and the second housing part (102). The first end of the housing (100) provided with the convex ring part (120) is internally formed with a cooling chamber, the first end is provided with a plurality of heat dissipation parts (130) protruding outward along the axial direction of the rotating shaft (110), and the heat dissipation parts (130) are configured to increase the heat dissipation outer surface area of the cooling chamber.

2. The reduction gear motor as set forth in claim 1, wherein The gear train unit (200) is a planetary gear train, comprising a sun gear (210) connected with the rotating shaft (110), a plurality of planet gears (220) meshing with the sun gear (210), a planet carrier (230) provided with the planet gears (220), and a ring gear (240) located at the outer circle of the planet carrier (230) and meshing with the planet gears (220), wherein the ring gear (240) is fixed in the convex ring part (120), one of the outer peripheral wall of the ring gear (240) and the inner circle of the convex ring part (120) is provided with a plurality of axial ribs (121), and the other is provided with a rib groove (122) matched with the ribs (121), and the ribs (121) are distributed at intervals in the circumferential direction.

3. The reduction gear motor as set forth in claim 2, wherein The planet gears (220) are arranged on the planet carrier (230) through pin shafts (250), and a first bearing (260) is arranged between the pin shafts (250) and the planet gears (220).

4. The reduction gear motor of claim 1, wherein At least one side outer end surface of the planet carrier (230) is provided with an oil guide structure, each pin shaft (250) is provided with a liquid passage for connecting the oil guide structure and the first bearing (260), and the oil guide structure is configured to guide the lubricating oil in the closed space into the liquid passage during rotation of the planet carrier (230).

5. The reduction gear motor of claim 1, wherein The oil guide structure at least comprises circumferentially distributed grooves (400) in communication with the liquid passage.

6. The reduction gear as set forth in claim 5, characterized by ​ ​ 7. The reduction gear as set forth in claim 6, characterized by ​ 8. The reduction gear as set forth in claim 7, characterized by The oil guiding structure is a groove (400) concaved on the outer end surface of the planet carrier (230); or The oil guiding structure is a flow guide piece (500) externally arranged on the outer end surface of the planet carrier (230) and having a groove (400).

9. The reduction gear as set forth in claim 8, characterized by The flow guide piece (500) is in the shape of a ring, and the inner ring of the flow guide piece (500) is radially recessed to form the groove (400); The flow guide piece (500) is provided with a plug-in post (510) on the end surface close to the planet carrier (230), the planet carrier (230) is provided with a plug hole (231) matched with the plug-in post (510), and the flow guide piece (500) is detachably arranged on the planet carrier (230) through the matching between the plug-in post (510) and the plug hole (231). The flow guide piece (500) is further provided with a lead ring post (520) communicated with the groove (400) on the end surface close to the planet carrier (230), the pin shaft (250) has a central hole (251) extending in the axial direction, the lead ring post (520) is at least partially inserted into the central hole (251), the hole wall of the central hole (251) is provided with a communication hole (252) extending in the radial direction thereof, and the central hole (251) and the communication hole (252) constitute the liquid passage.

10. The reduction gear as set forth in claim 9, characterized by The flow guide piece (500) comprises a first pad plate (501) provided with the plug-in post (510) and the lead ring post (520), a second pad plate (502) opposite to the first pad plate (501), and a side wall plate (503) connecting the first pad plate (501) and the second pad plate (502), the first pad plate (501) and the second pad plate (502) are distributed perpendicularly to the axial direction, the side wall plate (503) is peripherally arranged at the outer edge of the first pad plate (501) and the second pad plate (502), and the plug-in post (510) and the lead ring post (520) are arranged on the first pad plate (501). The side wall plate (503) is radially outwardly convex to form a raised portion (504) corresponding to the lead ring post (520).

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