Gear box with motor

Abstract

A gearbox with a motor comprises the motor, a transmission gear set and an output end, the transmission gear set comprises a driving gear (2), an output gear (3) and an intermediate gear (4) between the driving gear (2) and the output gear (3), all gears of the transmission gear set are sequentially meshed to form flat distribution, and the gearbox further comprises an upper shell (5) and a lower shell (6). Each gear is mounted in an inner cavity (20) formed by vertically assembling the upper shell (5) and the lower shell (6), the upper shell (5) or the lower shell (6) is integrally provided with a vertical part (7), the motor is mounted on the vertical part (7) and is supported by the vertical part (7), the vertical part (7) is provided with an axial through hole (8), a bearing is mounted in the axial through hole (8), and the rotating shaft (1) is supported and positioned by the bearing; the gearbox provided with the motor is convenient to assemble, and meanwhile it can be guaranteed that the driving gear driven by the rotating shaft of the motor is well meshed with the next-stage gear.

Description

Technical Field

[0001] This utility model relates to the field of gearbox technology, and specifically to a gearbox equipped with a motor. Background Technology

[0002] In electromechanical products, a gearbox driven by a motor is the primary power source. In household appliances, especially small appliances, there are strict requirements regarding the size of the power source. One type of gearbox includes a motor, a transmission gear set, and an output end. The transmission gear set is located between the motor and the output end. A drive gear is coaxially mounted on the motor's shaft, and an output gear is coaxially mounted on the output end. The transmission gear set includes the drive gear, the output gear, and an intermediate gear between them. There can be one or more intermediate gears. The motor's shaft, the shafts of each gear in the transmission gear set, and the shaft of the output gear are all laterally distributed and arranged in parallel. The gears in the transmission gear set mesh sequentially to form a flat distribution. This design achieves a volume advantage.

[0003] While the gearbox equipped with a motor has a size advantage, it also presents some challenges. Further research is needed on how to facilitate assembly and ensure that the drive gear driven by the motor shaft maintains good meshing with the next stage gear. Maintaining good meshing is beneficial for stable and reliable transmission. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a gearbox equipped with a motor, which is easy to assemble and at the same time helps to ensure that the driving gear driven by the motor shaft maintains good meshing with the next stage gear.

[0005] The technical solution of this utility model is: a gearbox equipped with a motor, including a motor, a transmission gear set, and an output end. The transmission gear set is arranged between the motor and the output end. The motor shaft is coaxially provided with a driving gear, and the output end is provided with an output gear. The transmission gear set includes the driving gear, the output gear, and an intermediate gear between the driving gear and the output gear. The shaft of the motor, the shafts of each intermediate gear of the transmission gear set, and the shaft of the output gear are all distributed laterally and arranged in parallel. The gears of the transmission gear set mesh sequentially to form a flat distribution. It also includes an upper housing and a lower housing. The upper housing and the lower housing are both arranged laterally from the motor side to the output end side. The gears are installed in the inner cavity formed by the upper and lower housings. The upper housing or the lower housing is integrally provided with a vertical part. The motor is mounted on the vertical part and supported by the vertical part. The vertical part is provided with an axial through hole. A bearing is installed in the axial through hole. The motor shaft is connected to the bearing. The shaft is supported and positioned by the bearing.

[0006] With the above structure, this utility model has the following advantages:

[0007] Since the gears are installed in the inner cavity formed by the upper and lower housings, and the upper or lower housing is integrally provided with a vertical part, the motor is mounted on the vertical part and supported by the vertical part. The vertical part is provided with an axial through hole, and a bearing is installed in the axial through hole. The motor shaft is connected to the bearing and supported and positioned by the bearing. Therefore, it can better ensure the parallelism of the motor shaft and the coaxially arranged drive gear relative to the next stage gear. In other words, after adopting the technical solution of this disclosure, it is beneficial to avoid the skewing of the motor shaft and the coaxially arranged drive gear during mass production. Therefore, it is beneficial to ensure that the drive gear driven by the motor shaft maintains good meshing with the next stage gear. At the same time, due to the function of the vertical part and the bearing, the assembly difficulty is also reduced, that is, the process of repeated correction and locking to avoid the skewing in the prior art is eliminated, which is beneficial to the convenience of assembly.

[0008] In some embodiments, the motor is an external rotor motor, which includes an external rotor and a stator. The stator is fixedly mounted on the vertical part, and the external rotor is rotatably mounted on the stator. The upper end of the external rotor is connected to the shaft, and the rotation of the external rotor drives the shaft to rotate.

[0009] In some embodiments, the vertical portion is provided with vertical protruding ribs in the circumferential direction, and the stator is provided with vertical grooves in the inner circumference that engage with the vertical protruding ribs.

[0010] In some embodiments, a plurality of vertical protruding ribs are provided along the circumference of the vertical portion, and at least one of the vertical protruding ribs is provided with a guide portion extending upward to the upper end of the vertical portion, the guide portion being used for vertical groove insertion and engagement.

[0011] In some embodiments, the upper end of the guide portion is provided with a clearance ramp.

[0012] In some embodiments, a plurality of vertical protruding ribs are provided along the circumference of the vertical portion, and at least one of the vertical protruding ribs is configured as a trapezoid that is narrower at the top and wider at the bottom.

[0013] In some embodiments, the vertical part has a support surface for mounting the circuit board at the lower end of the vertical protruding rib, and a positioning structure is provided between the vertical part and the stator. The positioning structure positions the height of the stator mounted on the vertical part so that an installation gap is formed between the lower end surface of the stator and the support surface, and the circuit board is mounted in the installation gap.

[0014] In some embodiments, a plurality of vertical protruding ribs are provided along the circumference of the vertical portion, and at least one of the vertical protruding ribs is configured as a trapezoid with a narrow top and a wide bottom, the trapezoidal vertical protruding rib positioning the height of the stator so that an installation gap is formed between the lower end face of the stator and the support surface.

[0015] In some embodiments, when an external rotor is used, the upper end of the external rotor is provided with a sleeve hole. The circuit board and the stator are first sequentially mounted on the vertical part, and then the external rotor is rotatably mounted on the stator while the sleeve hole is fixedly fitted with the upper end of the rotating shaft.

[0016] In some embodiments, the bearing includes a first bearing and a second bearing, and the vertical portion includes a first mounting portion at its upper end and a second mounting portion at its lower end and located on one side of the inner cavity. The first mounting portion is used to mount the first bearing from top to bottom, and the second mounting portion is used to mount the second bearing from bottom to top. Attached Figure Description

[0017] Figure 1 This is a three-dimensional schematic diagram of a gearbox equipped with a motor.

[0018] Figure 2 This is an exploded schematic diagram of an external rotor motor mounted on a vertical section and a rotating shaft.

[0019] Figure 3 This is a top view schematic diagram of a gearbox equipped with a motor.

[0020] Figure 4 This is a sectional view along axis AA.

[0021] Figure 5 This is a three-dimensional schematic diagram of a lower housing equipped with various intermediate gears and output gears.

[0022] Figure 6 This is a three-dimensional schematic diagram of an upper shell from a lower perspective.

[0023] Figure 7 This is a three-dimensional schematic diagram of an upper shell from an upper side view.

[0024] Figure 8 This is a cross-sectional view of an upper shell in the AA direction.

[0025] In the figure of this utility model: 1-rotating shaft, 2-drive gear, 3-output gear, 4-intermediate gear, 5-upper housing, 6-lower housing, 7-vertical part, 8-axial through hole, 9-outer rotor, 10-stator, 11-vertical protruding rib, 12-vertical groove, 13-guide part, 14-avoidance slope, 15-support surface, 16-trapezoidal shape, 17-sleeve hole, 18-first bearing, 19-second bearing, 20-inner cavity, 21-circuit board, 22-output shaft, 23-insertion hole, 24-first mounting part, 25-second mounting part, 26-separation part. Detailed Implementation

[0026] To better understand this application, various aspects of this application will be described in more detail below with reference to the accompanying drawings. It should be understood that these detailed descriptions are merely illustrative of exemplary embodiments of this application and are not intended to limit the scope of this application in any way. Throughout the specification, the same reference numerals refer to the same elements.

[0027] like Figures 1 to 7 As shown, a gearbox equipped with a motor is disclosed. The gearbox includes a motor, a transmission gear set, and an output end. The transmission gear set is arranged between the motor and the output end. The motor shaft 1 is coaxially provided with a driving gear 2, and the output end is provided with an output gear 3. The transmission gear set includes the driving gear 2, the output gear 3, and an intermediate gear 4 between the driving gear 2 and the output gear 3. The shafts of the motor shaft 1, the intermediate gears 4 of the transmission gear set, and the output gear 3 are all distributed laterally and arranged in parallel. The gears of the transmission gear set mesh sequentially to form a flat distribution. The gearbox also includes an upper housing 5 and a lower housing 6. The upper housing 5 and the lower housing 6 are both arranged laterally from the motor side to the output end side. The inner cavity 20 formed by the upper housing 5 and the lower housing 6 is assembled vertically and installed with the gears. The upper housing 5 or the lower housing 6 is integrally provided with a vertical part 7. The motor is mounted on the vertical part 7 and supported by the vertical part 7. The vertical part 7 is provided with an axial through hole 8, and a bearing is installed in the axial through hole 8. The motor shaft 1 is connected to the bearing, and the shaft 1 is supported and positioned by the bearing.

[0028] like Figure 2 , 6 As shown in Figure 7, the upper housing 5 is integrally provided with a vertical part 7. For example, the upper housing 5 and the vertical part 7 are integrally formed by aluminum die casting, and then the axial through hole 8 is precision machined before the bearing and the shaft 1 are installed. Of course, if the aluminum die casting precision is sufficient, the bearing and the shaft 1 can be directly installed.

[0029] In terms of power output structure, the output gear 3 can be used directly as the output end, or it can be other structures, such as further installing an output shaft 22 on the output gear 3, with the output shaft 22 serving as the output end.

[0030] In some embodiments, such as Figure 4 As shown, the motor shaft 1 is integrally provided with a drive gear 2, and the inner cavity 20 is provided with an insertion hole 23 at the corresponding position of the shaft 1. The drive gear 2 extends into the insertion hole 23 and can be rotatably sleeved and fitted. Lubricating grease can be provided between the drive gear and the insertion hole.

[0031] like Figure 4 , 5As shown in Figure 8, the bearing includes a first bearing 18 and a second bearing 19. The vertical part 7 includes a first mounting part 24 at its upper end and a second mounting part 25 at its lower end and located on one side of the inner cavity 20. The first bearing 18 is mounted from top to bottom in the first mounting part 24, and the second bearing 19 is mounted from bottom to top in the second mounting part 25. A partition 26 is provided between the first mounting part 24 and the second mounting part 25 to axially limit the first bearing 18 and the second bearing 19 relative to each other. In this way, the rotating shaft 1 is better supported and positioned by the first bearing 18 and the second bearing 19.

[0032] like Figure 2 As shown, in this example, the motor is an external rotor motor, which includes an external rotor 9 and a stator 10. The stator 10 is fixedly mounted on the vertical part 7, and the external rotor 9 is rotatably mounted on the stator 10. The upper end of the external rotor 9 is connected to the rotating shaft 1, and the rotation of the external rotor 9 drives the rotating shaft 1 to rotate.

[0033] Furthermore, such as Figure 2 As shown, the vertical portion 7 has vertically protruding ribs 11 circumferentially, and the stator 10 has vertical grooves 12 on its inner circumference that engage with the vertically protruding ribs 11. In this example, there are multiple vertically protruding ribs 11, which are evenly distributed along the circumference of the vertical portion 7. This not only facilitates the installation of the stator 10, but also, since the rotating shaft 1 is supported and positioned by the bearing in the axial through hole 8, and the vertically protruding ribs 11 are provided on the vertical portion 7, the stator 10 and the rotating shaft 1 have a high relative positional accuracy after the stator 10 is installed. At the same time, since the upper end of the outer rotor 9 is connected to the rotating shaft 1, the stator 10 and the outer rotor 9 can be rotatably fitted together with high relative positional accuracy.

[0034] Furthermore, such as Figure 2 As shown, multiple vertical protruding ribs 11 are provided along the circumference of the vertical portion 7, and at least one of the vertical protruding ribs 11 is provided with a guide portion 13 extending upward to the upper end of the vertical portion 7. The guide portion 13 is used for insertion and engagement with the vertical groove 12. In this way, when there are multiple vertical protruding ribs 11, the guide portion 13 first engages with the vertical groove 12, and then the approximate positions of the other vertical protruding ribs 11 and the other vertical grooves 12 are realized, thereby facilitating and quickly installing the stator 10 onto the vertical portion 7.

[0035] To facilitate installation and prevent the upper surface of the guide section 13 from hitting the lower end of the stator 10 during installation, thus avoiding assembly problems, such as... Figure 2 As shown, the upper end of the guide section 13 is provided with a clearance slope 14.

[0036] In addition, in order to have a certain limit in the axial direction, such as Figure 2 As shown, one of the vertical protruding ribs 11 is set as a trapezoid 16 that is narrow at the top and wide at the bottom.

[0037] In some embodiments, such as Figure 1 , 2 As shown, the vertical part 7 has a support surface 15 for mounting the circuit board 21 at the lower end of the vertical protruding rib 11. A positioning structure is provided between the vertical part 7 and the stator 10. The positioning structure positions the stator 10 on the vertical part 7 at a certain height so that an installation gap is formed between the lower end surface of the stator 10 and the support surface 15. The circuit board 21 is mounted in this installation gap. This makes it easier to install the circuit board 21, and the circuit board 21 is also protected by being located in the installation gap.

[0038] Furthermore, such as Figure 2 As shown, multiple vertical protruding ribs 11 are provided along the circumference of the vertical portion 7, and at least one of the vertical protruding ribs 11 is set as a trapezoid 16 that is narrower at the top and wider at the bottom. The vertical protruding rib 11 of the trapezoid 16 positions the height of the stator 10 so that an installation gap is formed between the lower end face of the stator 10 and the support surface 15. In this way, the structure is simple and the positioning is convenient.

[0039] In some embodiments, such as Figure 2 As shown, the upper end of the outer rotor 9 is provided with a sleeve hole 17. The circuit board 21 and the stator 10 are first sequentially mounted on the vertical part 7. Then, the outer rotor 9 is rotatably mounted on the stator 10, so that the sleeve hole 17 is fixedly engaged with the upper end of the rotating shaft 1. This structural arrangement is more conducive to convenient assembly, improves assembly efficiency, and reduces costs.

[0040] The above description is merely an illustrative embodiment of this utility model. Therefore, all equivalent changes or modifications made to the structure, features, and principles described in the scope of protection of this utility model are included within the scope of protection of this utility model.

Claims

1. A gearbox equipped with a motor, comprising a motor, a transmission gear set, and an output end, wherein the transmission gear set is disposed between the motor and the output end, a drive gear (2) is coaxially disposed on the motor shaft (1), and an output gear (3) is disposed on the output end, the transmission gear set comprising the drive gear (2), the output gear (3), and an intermediate gear (4) between the drive gear (2) and the output gear (3), wherein the shafts of the motor shaft (1), the intermediate gears (4) of the transmission gear set, and the output gear (3) are all distributed laterally and arranged in parallel, and the gears of the transmission gear set mesh sequentially to form a flat distribution, characterized in that: It also includes an upper housing (5) and a lower housing (6). Both the upper housing (5) and the lower housing (6) are arranged to extend laterally from the motor side to the output end side. The gears are installed in the inner cavity (20) formed by the upper housing (5) and the lower housing (6) assembled vertically. The upper housing (5) or the lower housing (6) is integrally provided with a vertical part (7). The motor is installed on the vertical part (7) and supported by the vertical part (7). The vertical part (7) is provided with an axial through hole (8). The axial through hole (8) is equipped with a bearing. The motor shaft (1) is connected to the bearing. The shaft (1) is supported and positioned by the bearing.

2. A gearbox equipped with a motor according to claim 1, characterized in that: The motor is an external rotor motor, which includes an external rotor (9) and a stator (10). The stator (10) is fixed on the vertical part (7). The external rotor (9) is rotatably fitted on the stator (10). The upper end of the external rotor (9) is connected to the rotating shaft (1). The rotation of the external rotor (9) drives the rotating shaft (1) to rotate.

3. A gearbox equipped with a motor according to claim 2, characterized in that: The vertical part (7) is provided with a vertical protruding rib (11) in the circumference, and the stator (10) is provided with a vertical groove (12) that is inserted and matched with the vertical protruding rib (11) in the inner circumference.

4. A gearbox equipped with a motor according to claim 3, characterized in that: A plurality of vertical protruding ribs (11) are provided along the circumference of the vertical portion (7), and at least one of the vertical protruding ribs (11) is provided with a guide portion (13) extending upward to the upper end of the vertical portion (7), the guide portion (13) being used for insertion and engagement with the vertical groove (12).

5. A gearbox equipped with a motor according to claim 4, characterized in that: The upper end of the guide section (13) is provided with a clearance ramp (14).

6. A gearbox equipped with a motor according to claim 3 or 4, characterized in that: Multiple vertical protruding ribs (11) are provided along the circumference of the vertical part (7), and at least one of the vertical protruding ribs (11) is configured as a trapezoid (16) that is narrow at the top and wide at the bottom.

7. A gearbox equipped with a motor according to claim 1, 2, 3, or 4, characterized in that: The vertical part (7) has a support surface (15) for mounting the circuit board (21) at the lower end of the vertical protruding rib (11). A positioning structure is provided between the vertical part (7) and the stator (10). The positioning structure positions the height of the stator (10) mounted on the vertical part (7) so that an installation gap is formed between the lower end surface of the stator (10) and the support surface (15). The circuit board (21) is mounted in this installation gap.

8. A gearbox equipped with a motor according to claim 7, characterized in that: Multiple vertical protruding ribs (11) are provided along the circumference of the vertical part (7), and at least one of the vertical protruding ribs (11) is set as a trapezoid (16) that is narrow at the top and wide at the bottom. The vertical protruding rib (11) of the trapezoid (16) positions the height of the stator (10) so that an installation gap is formed between the lower end face of the stator (10) and the support surface (15).

9. A gearbox equipped with a motor according to claim 7, characterized in that: In the case of using an external rotor (9), the upper end of the external rotor (9) is provided with a sleeve hole (17). The circuit board (21) and the stator (10) are first sequentially mounted on the vertical part (7). Then, the external rotor (9) is rotatably mounted on the stator (10) while the sleeve hole (17) is fixedly fitted with the upper end of the rotating shaft (1).

10. A gearbox equipped with a motor according to claim 1, 2, 3, or 4, characterized in that: The bearing includes a first bearing (18) and a second bearing (19). The vertical part (7) includes a first mounting part (24) located at its upper end, a second mounting part (25) located at its lower end and on one side of the inner cavity (20), and a partition part (26) between the first mounting part (24) and the second mounting part (25). The first bearing (18) is mounted from top to bottom in the first mounting part (24), and the second bearing (19) is mounted from bottom to top in the second mounting part (25).

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