Motor assembly with gear reducer

Abstract

A motor assembly with a gear reducer comprises a shell, a driving gear, a second-stage gear, a third-stage gear, a fourth-stage gear and an output gear are sequentially arranged in a containing cavity of the shell from bottom to top, the shell is provided with a driving motor, the output end of the driving motor is connected with a vertical first shaft body, and the driving gear is fixedly connected to the first shaft body in a sleeved mode; the shell is further provided with a second shaft body and a third shaft body, the second shaft body is rotationally sleeved with the second-stage gear and the fourth-stage gear, and the third shaft body is rotationally sleeved with the third-stage gear; the shell is detachably connected with a middle partition plate in the transverse direction, a protruding supporting shaft base is arranged on the upper side of the middle partition plate, and the output gear is rotationally connected to the supporting shaft base in a sleeving mode. A large fluted disc of the second-stage gear is meshed with the driving gear, a small fluted disc of the second-stage gear is meshed with a large fluted disc of the third-stage gear, a small fluted disc of the third-stage gear is meshed with a large fluted disc of the fourth-stage gear, and a small fluted disc of the fourth-stage gear is meshed with the output gear. According to the scheme, the structural layout is compact, meanwhile, large torque of the output gear is ensured, and good practicability is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of motor reducers, and in particular to a motor assembly with a gear reducer. Background Art

[0002] In recent years, the new energy vehicle industry has developed rapidly. Compared with fuel vehicles, new energy vehicles are driven by power batteries, and power batteries have higher requirements for ambient temperature, so it is necessary to centrally manage the energy of the vehicle body through a thermal management system. The thermal management system generally controls the temperature of the power battery through the water circuit, so in the thermal management system, an actuator is required to control the on and off of the water circuit, and the water valve can play this role.

[0003] The driving mechanism of ordinary water valves is driven by a servo motor and a flat gear system to drive the output shaft to rotate, and then the output shaft drives the valve core to realize the switch control of the water valve. However, when the flat gear system is used to achieve a larger reduction ratio, it often occupies a larger space area, which cannot meet customer needs. Summary of the invention

[0004] The purpose of the present invention is to solve the problem that the driving mechanism of ordinary water valves in the prior art adopts a planar gear system, which often occupies a large space area when a planar gear system is to achieve a larger reduction ratio and cannot meet the demand.

[0005] In order to solve the above problems, the present invention provides a motor assembly with a gear reducer, comprising a housing, the housing having an accommodating cavity with an upper end opening, the accommodating cavity being provided with a driving gear, a secondary gear, a tertiary gear, a quaternary gear and an output gear in sequence from bottom to top, the housing being provided with a driving motor located below the driving gear, the output end of the driving motor being connected with a vertical first shaft body, the driving gear being fixedly sleeved on the first shaft body, the housing being further provided with a second shaft body and a third shaft body both along the vertical direction, the first shaft body, the second shaft body and the third shaft body being staggered with each other in the transverse direction, the secondary gear and the quaternary gear being rotatably sleeved on the lower part and the upper part of the second shaft body respectively, the tertiary gear being rotatably sleeved on the third shaft body;

[0006] The housing is detachably connected with a middle partition in the transverse direction, the middle partition is located between the output gear and the driving motor, a raised support shaft seat is provided on the upper side of the middle partition, and the support shaft seat is staggered in the transverse direction relative to the four-stage gear, and the output gear is rotatably sleeved on the support shaft seat;

[0007] The secondary gear, the tertiary gear, and the quaternary gear all have a large toothed disc and a small toothed disc. The large toothed disc of the secondary gear is meshed with the driving gear and the small toothed disc is meshed with the large toothed disc of the tertiary gear. The small toothed disc of the tertiary gear is meshed with the large toothed disc of the quaternary gear, and the small toothed disc of the quaternary gear is meshed with the output gear.

[0008] Compared with the prior art, the driving gear, secondary gear, tertiary gear, fourth gear and output gear of the above scheme are stacked in sequence from bottom to top, which greatly reduces the occupied space area compared with the planar gear system of the prior art, and because the first shaft, the second shaft and the third shaft are staggered with each other, the secondary gear and the fourth gear are rotatably sleeved on the lower and upper parts of the second shaft respectively, and the third gear is rotatably sleeved on the third shaft, so that the structural layout of the secondary gear, the third gear and the fourth gear is very compact, and the overall volume can be kept very small, and the vertical position of the output gear is roughly close to that of the driving gear, which can be better adapted and installed; at the same time, the rotational power of the driving gear is transmitted to the output gear through the multi-stage transmission of the secondary gear, the third gear and the fourth gear, ensuring a larger torque of the output gear and having better practicality.

[0009] In an improved solution, a first circuit board is further provided in the accommodating cavity. The first circuit board is connected to the bottom of the middle partition and is located above the driving motor. The driving motor is electrically connected to the first circuit board, so that the start and stop or the speed of the driving motor can be controlled by the first circuit board. The first circuit board is connected and fixed by the middle partition, which is convenient for assembly.

[0010] In an improved solution, the drive motor is a brushless motor, the first shaft is connected to the rotor of the brushless motor, and the stator coil of the brushless motor is electrically connected to the first circuit board. The brushless motor has a compact structure, low noise, and stable operation. Since the first circuit board is arranged adjacent to the brushless motor, multiple stator coils of the brushless motor can be easily electrically connected to the first circuit board, which is convenient to assemble and has a reasonable layout.

[0011] In an improved scheme, the output gear is provided with a magnet, and a second circuit board is also provided in the accommodating cavity. The second circuit board is connected to the top of the middle partition and is located below the output gear. The second circuit board is provided with an avoidance hole for the support shaft seat to pass through. The second circuit board and the first circuit board are electrically connected to each other. The second circuit board is provided with a Hall sensor for sensing the magnet. The Hall sensor detects the rotation state of the output gear by sensing the magnet of the output gear, and the second circuit board transmits the data to the first circuit board for feedback adjustment of the output state of the drive motor. In addition, the first circuit board and the second circuit board are respectively connected to the bottom and the top of the middle partition, which is not only convenient for assembly, but also improves space utilization through stacking design. When the plane size remains unchanged, the first circuit board plus the second circuit board can have a larger usable area, that is, more electronic components can be installed.

[0012] In an improved solution, the output gear and the magnet are integrally injection molded, which ensures a stable connection and convenient processing.

[0013] In an improved solution, the first circuit board and the second circuit board are electrically connected via a power strip, and the middle partition plate is vertically provided with a wire hole for the power strip to pass through, thereby facilitating assembly.

[0014] In an improved solution, the middle partition is located vertically between the second-stage gear and the fourth-stage gear and is staggered laterally relative to the third-stage gear. The upper end of the first shaft is rotatably connected to the middle partition, thereby further making the layout of the parts in the accommodating cavity more compact and reasonable, which is conducive to reducing the volume of the shell.

[0015] In an improved solution, it also includes an upper cover, which is detachably connected to the upper side of the shell to achieve the closure of the accommodating cavity. A convex shaft is provided on the upper side of the output gear, and the upper cover is provided with a cover hole for the convex shaft to extend out, thereby achieving the closure of the accommodating cavity through the upper cover.

[0016] In an improved solution, an oil seal ring is provided between the upper cover and the output gear, and the oil seal ring is arranged around the cover hole to ensure the sealing between the upper cover and the output gear.

[0017] In an improved solution, a raised first boss is provided on the bottom wall of the accommodating cavity corresponding to the position of the second shaft body, and the lower side of the second-stage gear abuts against the first boss to be supported, and the lower side of the fourth-stage gear abuts against the upper side of the second-stage gear to be supported; a raised second boss is provided on the bottom wall of the accommodating cavity corresponding to the position of the third shaft body, and the lower side of the third-stage gear abuts against the second boss to be supported. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is an overall schematic diagram of a motor assembly with a gear reducer;

[0019] Figure 2 It is a schematic diagram of a motor assembly with a gear reducer with the upper cover hidden;

[0020] Figure 3 A schematic diagram of a motor assembly with a gear reducer without the housing Figure 1 ;

[0021] Figure 4 A schematic diagram of a motor assembly with a gear reducer without the housing Figure 2 ;

[0022] Figure 5 It is a top view schematic diagram of a motor assembly with a gear reducer with the upper cover hidden;

[0023] Figure 6 For along Figure 5Schematic cross-sectional view of the AA section line;

[0024] Figure 7 For along Figure 5 Schematic cross-sectional view of the BB section line;

[0025] Figure 8 For along Figure 5 Schematic cross-sectional view of the CC section line.

[0026] Description of reference numerals:

[0027] 1. Shell; 10. Accommodating cavity; 11. Middle partition; 111. Support shaft seat; 112. Wire hole; 12. First shaft body; 13. Second shaft body; 14. Third shaft body; 15. Upper cover; 151. Cover hole; 16. First boss; 17. Second boss; 2. Driving motor; 3. Active gear; 4. Secondary gear; 5. Third gear; 6. Fourth gear; 7. Output gear; 71. Magnet; 72. Protruding shaft; 72. Oil seal ring; 8. First circuit board; 81. Socket; 9. Second circuit board; 91. Hall sensor; 92. Avoidance hole. DETAILED DESCRIPTION

[0028] It should be understood by those skilled in the art that the following embodiments are only used to explain the technical principles of the embodiments of the present application and are not intended to limit the protection scope of the embodiments of the present application. Those skilled in the art may adjust them as needed to adapt to specific application scenarios.

[0029] In the description of the following embodiments, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of this application can be understood according to specific circumstances.

[0030] In the embodiments of the present application, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0031] The present application is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0032] See also Figure 1-Figure 8 , an embodiment of the present invention provides a motor assembly with a gear reducer, including a housing 1, the housing 1 having an accommodating chamber 10 with an upper opening, the accommodating chamber 10 being provided with a driving gear 3, a secondary gear 4, a tertiary gear 5, a quaternary gear 6 and an output gear 7 in sequence from bottom to top, the housing 1 being provided with a driving motor 2 located below the driving gear 3, the output end of the driving motor 2 being connected with a vertical first shaft 12, the driving gear 3 being fixedly sleeved on the first shaft 12, the housing 1 being further provided with a second shaft 13 and a third shaft 14 both along the vertical direction, the first shaft 12, the second shaft 13 and the third shaft 14 being staggered with each other in the transverse direction, the secondary gear 4 and the quaternary gear 6 being rotatably sleeved on the lower part and the upper part of the second shaft 13 respectively, the tertiary gear 5 being rotatably sleeved on the third shaft 14;

[0033] The housing 1 is detachably connected with a middle partition plate 11 in the transverse direction, the middle partition plate 11 is located between the output gear 7 and the driving motor 2, a raised support shaft seat 111 is provided on the upper side of the middle partition plate 11, and the support shaft seat 111 is staggered in the transverse direction relative to the fourth-stage gear 6, and the output gear 7 is rotatably sleeved on the support shaft seat 111;

[0034] The secondary gear 4, the tertiary gear 5 and the quaternary gear 6 all have a large toothed disc and a small toothed disc. The large toothed disc of the secondary gear 4 is meshed with the driving gear 3 and the small toothed disc is meshed with the large toothed disc of the tertiary gear 5. The small toothed disc of the tertiary gear 5 is meshed with the large toothed disc of the quaternary gear 6, and the small toothed disc of the quaternary gear 6 is meshed with the output gear 7.

[0035] The above scheme is designed by stacking the driving gear 3, the secondary gear 4, the tertiary gear 5, the fourth gear 6 and the output gear 7 from bottom to top in sequence, which greatly reduces the occupied space area compared with the planar gear system of the prior art. Moreover, since the first shaft 12, the second shaft 13 and the third shaft 14 are staggered with each other, the secondary gear 4 and the fourth gear 6 are rotatably sleeved on the lower part and the upper part of the second shaft 13 respectively, and the tertiary gear 5 is rotatably sleeved on the third shaft 14, so that the structural layout of the secondary gear 4, the tertiary gear 5 and the fourth gear 6 is very compact, and the overall volume can also be kept very small. The total number of the secondary gear 4, the tertiary gear 5 and the fourth gear 6 is three, that is, an odd number, so that the vertical position of the output gear 7 is roughly close to that of the driving gear 3, and can be better adapted and installed; and the rotational power of the driving gear 3 is transmitted to the output gear 7 through the multi-stage transmission of the secondary gear 4, the tertiary gear 5 and the fourth gear 6, which ensures a larger torque of the output gear 7 and has good practicality.

[0036] Regarding the rotational sleeve connection of the secondary gear 4 and the fourth gear 6 relative to the second shaft 13, or the rotational sleeve connection of the third gear 5 relative to the third shaft 14, a snap ring may be provided on the second shaft 13 to achieve axial fixation of the secondary gear 4 and the fourth gear 6 and circumferential rotation, and a snap ring may be provided on the third shaft 14 to achieve axial fixation of the third gear 56 and circumferential rotation, which belongs to the prior art. Or in this embodiment, as Figure 8 As shown, a raised first boss 16 is provided on the bottom wall of the accommodating cavity 10 at a position corresponding to the second shaft body 13, and the lower side of the second-stage gear 4 abuts against the first boss 16 to be supported, and the lower side of the fourth-stage gear 6 abuts against the upper side of the second-stage gear 4 to be supported; a raised second boss 17 is provided on the bottom wall of the accommodating cavity 10 at a position corresponding to the third shaft body 14, and the lower side of the third-stage gear 5 abuts against the second boss 17 to be supported, which makes assembly more convenient.

[0037] In this embodiment, a first circuit board 8 is further provided in the accommodating cavity 10. The first circuit board 8 is connected to the bottom of the middle partition 11 and is located above the driving motor 2. The driving motor 2 is electrically connected to the first circuit board 8, so that the start and stop or speed of the driving motor 2 can be controlled by the first circuit board 8. The first circuit board 8 is connected and fixed by the middle partition 11, which is convenient for assembly.

[0038] In this embodiment, the drive motor 2 is a brushless motor, the first shaft 12 is connected to the rotor of the brushless motor, and the stator coil of the brushless motor is electrically connected to the first circuit board 8. The brushless motor has a compact structure, low noise, and stable operation. Since the first circuit board 8 is arranged adjacent to the brushless motor, the multiple stator coils of the brushless motor can be conveniently electrically connected to the first circuit board 8, which is convenient to assemble and has a reasonable layout.

[0039] Furthermore, a magnet 71 is provided in the middle of the lower side of the output gear 7, and a second circuit board 9 is also provided in the accommodating cavity 10. The second circuit board 9 is connected to the top of the middle partition 11 and is located below the output gear 7. The second circuit board 9 is provided with an avoidance hole 92 for the support shaft seat 111 to pass through. The second circuit board 9 and the first circuit board 8 are electrically connected to each other. The second circuit board 9 is provided with a Hall sensor 91 for sensing the magnet 71. The Hall sensor 91 detects the rotation state of the output gear 7 by sensing the magnet 71 of the output gear 7, and then the second circuit board 9 transmits the data to the first circuit board 8 for feedback adjustment of the output state of the drive motor 2; in addition, the first circuit board 8 and the second circuit board 9 are respectively connected to the bottom and the top of the middle partition 11, which is not only convenient for assembly, but also improves the space utilization rate through the stacking design. When the plane size remains unchanged, the first circuit board 8 plus the second circuit board 9 can have a larger usable area, that is, more electronic components can be installed.

[0040] The output gear 7 and the magnet 71 are preferably formed by integrated injection molding, which ensures stable connection and convenient processing.

[0041] In this embodiment, vertical bolts are provided in the accommodating cavity 10 of the shell 1, and the middle partition 11 is fixed at the middle position in the height direction of the accommodating cavity 10 by bolts; the first circuit board 8 and the second circuit board 9 are also fixed by bolts, wherein the middle partition 11 is crimped to the upper side of the first circuit board 8, and at the same time, the middle partition 11 supports the lower side of the second circuit board 9, thereby ensuring the stability of the first circuit board 8 and the second circuit board 9 in the accommodating cavity 10.

[0042] like Figure 4 As shown, the first circuit board 8 and the second circuit board 9 are preferably electrically connected through a power strip 81, and the middle partition 11 is vertically provided with a wire hole 112 for the power strip 81 to pass through, so as to facilitate assembly. Of course, the first circuit board 8 and the second circuit board 9 can also be connected by wires, which is not limited to this.

[0043] In this embodiment, the middle partition 11 is located vertically between the secondary gear 4 and the fourth gear 6 and is staggered laterally relative to the third gear 5. The middle partition 11 is provided with a mounting hole for rotatably connecting the upper end of the first shaft 12, thereby further making the layout of the parts in the accommodating cavity 10 more compact and reasonable, which is beneficial to reducing the volume of the shell 1.

[0044] like Figure 1 As shown, an upper cover 15 is further provided on the upper side of the shell 1. The upper cover 15 is detachably connected to the upper side of the shell 1 by means of a snap connection or an interference fit to achieve the closure of the accommodating chamber 10. A convex shaft 72 is provided on the upper side of the output gear 7. The upper cover 15 is provided with a cover hole 151 for the convex shaft 72 to extend out, thereby achieving the closure of the accommodating chamber 10 through the upper cover 15.

[0045] Further, such as Figure 2 and Figure 7 As shown, an oil seal ring 73 is provided between the upper cover 15 and the output gear 7 , and the oil seal ring 73 is arranged around the cover hole 151 , thereby ensuring the sealing between the upper cover 15 and the output gear 7 .

[0046] In addition, the “offset arrangement” mentioned in the present application means that there is a gap between them and they do not interfere with each other.

[0047] It should be noted that, in the description of the present application, the terms "inside", "outside", etc. indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings. This is merely for the convenience of description and does not indicate or imply that the device or component must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present application. All directional indications (such as up, down, left, right, front, back, inside, and outside) are only used to explain the relative positional relationship, movement, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0048] In the description of the present application, the description with reference to the terms "one embodiment", "some embodiments", "in the present embodiment", "specific example", or "some examples" etc. means that the specific features, mechanisms, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, mechanisms, materials or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0049] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be based on the protection scope of the claims.

Claims

1. A motor assembly with a gear reducer, comprising a housing (1), wherein the housing (1) has a receiving cavity (10) with an upper opening, characterized in that: The accommodating cavity (10) is provided with a driving gear (3), a secondary gear (4), a tertiary gear (5), a quaternary gear (6) and an output gear (7) in order from bottom to top; the housing (1) is provided with a driving motor (2) located below the driving gear (3); the output end of the driving motor (2) is connected to a vertical first shaft (12); the driving gear (3) is fixedly sleeved on the first shaft (12); the housing (1) is further provided with a second shaft (13) and a third shaft (14) both in the vertical direction; the first shaft (12), the second shaft (13) and the third shaft (14) are mutually staggered in the horizontal direction; the secondary gear (4) and the quaternary gear (6) are respectively rotatably sleeved on the lower part and the upper part of the second shaft (13); the tertiary gear (5) is rotatably sleeved on the third shaft (14); The housing (1) is detachably connected to a middle partition (11) in the transverse direction, the middle partition (11) is located between the output gear (7) and the drive motor (2), a raised support shaft seat (111) is provided on the upper side of the middle partition (11), and the support shaft seat (111) is staggered in the transverse direction relative to the fourth-stage gear (6), and the output gear (7) is rotatably sleeved on the support shaft seat (111); The secondary gear (4), the tertiary gear (5), and the quaternary gear (6) all have a large toothed disc and a small toothed disc; the large toothed disc of the secondary gear (4) is meshed with the driving gear (3), and the small toothed disc is meshed with the large toothed disc of the tertiary gear (5); the small toothed disc of the tertiary gear (5) is meshed with the large toothed disc of the quaternary gear (6), and the small toothed disc of the quaternary gear (6) is meshed with the output gear (7).

2. The motor assembly with gear reducer according to claim 1, characterized in that: A first circuit board (8) is also provided in the accommodating cavity (10); the first circuit board (8) is connected below the middle partition (11) and is located above the drive motor (2); the drive motor (2) is electrically connected to the first circuit board (8).

3. The motor assembly with gear reducer according to claim 2, characterized in that: The driving motor (2) is a brushless motor, the first shaft (12) is connected to the rotor of the brushless motor, and the stator coil of the brushless motor is electrically connected to the first circuit board (8).

4. The motor assembly with gear reducer according to claim 2 or 3, characterized in that: The output gear (7) is provided with a magnet (71), and a second circuit board (9) is also provided in the accommodating cavity (10), the second circuit board (9) is connected to the top of the middle partition (11) and is located below the output gear (7), the second circuit board (9) and the first circuit board (8) are electrically connected to each other, and the second circuit board (9) is provided with a Hall sensor (91) for sensing the magnet (71).

5. The motor assembly with gear reducer according to claim 4, characterized in that: The output gear (7) and the magnet (71) are integrally injection molded.

6. The motor assembly with gear reducer according to claim 4, characterized in that: The first circuit board (8) and the second circuit board (9) are electrically connected via a power strip (81), and the middle partition plate (11) is vertically provided with a wire hole (112) for the power strip (81) to pass through.

7. The motor assembly with a gear reducer according to any one of claims 1 to 3, characterized in that: The middle partition (11) is located between the second-stage gear (4) and the fourth-stage gear (6) in the vertical direction and is staggered relative to the third-stage gear (5) in the horizontal direction. The upper end of the first shaft (12) is rotatably connected to the middle partition (11).

8. The motor assembly with gear reducer according to claim 1, characterized in that: The invention also comprises an upper cover (15), wherein the upper cover (15) is detachably connected to the upper side of the housing (1) to seal the accommodating chamber (10), a convex shaft (72) is provided on the upper side of the output gear (7), and the upper cover (15) is provided with a cover hole (151) for the convex shaft (72) to extend out.

9. The motor assembly with gear reducer according to claim 8, characterized in that: An oil seal ring (73) is provided between the upper cover (15) and the output gear (7), and the oil seal ring (73) is arranged around the cover hole (151).

10. The motor assembly with gear reducer according to claim 1, characterized in that: A raised first boss (16) is provided on the bottom wall of the accommodating cavity (10) at a position corresponding to the second shaft (13); the lower side of the second-stage gear (4) abuts against the first boss (16) so as to be supported; the lower side of the fourth-stage gear (6) abuts against the upper side of the second-stage gear (4) so ​​as to be supported; a raised second boss (17) is provided on the bottom wall of the accommodating cavity (10) at a position corresponding to the third shaft (14); the lower side of the third-stage gear (5) abuts against the second boss (17) so as to be supported.

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