Speed reducer built in motor

Abstract

The utility model discloses a speed reducer built in a motor. The speed reducer comprises a casing, the partition table is arranged in the machine shell and integrally formed with the machine shell, and the interior of the machine shell is divided into a first space and a second space under the action of the partition table; the limiting guide rails are distributed in the first space and are used for positioning and mounting the speed reducer; the speed reducer comprises an integrated gear ring and a gear set; wherein the two ends of the speed reducer are correspondingly assembled with the corresponding separation tables and the output pieces respectively, and the speed reducer is used for positioning the integrated gear ring. According to the speed reducer built in the motor provided by the utility model, the traditional split first-stage planet carrier and second-stage planet carrier are changed into the integrated gear ring, so that the structural integration between the first planetary gear set and the second planetary gear set is ensured, and the assembly clearance increase caused by the split type is reduced; and assembly errors are easy to generate to influence the transmission precision.

Description

Technical Field

[0001] This utility model relates to the field of speed reducer technology, and in particular to a speed reducer built into a motor. Background Technology

[0002] Currently, in some special working conditions, some motors are equipped with reducers for integrated assembly with the motor. For example, Chinese Patent CN 221263554 U discloses a DC brushless motor integrating a planetary reducer, driver, and magnetic encoder. It includes a motor housing, within which rotor magnetic poles and an inner stator are arranged. After being powered on, the rotor magnetic poles rotate. It also includes: a first-stage reduction gear system, including a first-stage sun gear, multiple first-stage planetary gears, and a first-stage planetary carrier. The first-stage sun gears are connected and rotate synchronously on the rotor magnetic poles, and the first-stage planetary carrier simultaneously meshes with multiple first-stage planetary gears; and a second-stage reduction gear system, including a second-stage sun gear, multiple second-stage planetary gears, and a second-stage planetary carrier. The second-stage sun gears are connected and rotate synchronously on the revolution of the first-stage planetary gears, and the second-stage planetary carrier simultaneously meshes with multiple second-stage planetary gears. The multiple second-stage planetary gears are connected to the output components of the motor. This application has the effect of reducing the overall size of the motor, increasing the applicable scenarios of the motor, and improving its flexibility.

[0003] The aforementioned conventional motors with reducers have a split internal gear ring, meaning that for both single-stage and two-stage reduction, a single-stage planetary carrier and a two-stage planetary carrier need to be used separately. Therefore, in practical applications, the single-stage and two-stage planetary carriers need to be assembled independently. However, each of the single-stage and two-stage planetary carriers will generate assembly gaps on both sides during independent assembly. As a result, the independently configured single-stage and two-stage planetary carriers will have gaps in at least four positions. Due to the increased assembly gaps, the reducer may have a large overall assembly error due to the superposition of these gaps in practical applications, which can easily affect the transmission accuracy of the gears. Therefore, a reducer built into the motor is proposed. Utility Model Content

[0004] Based on this, it is necessary to provide a reducer built into the motor to address the above-mentioned technical problems. This reducer integrates the traditionally separate primary and secondary planetary carriers into a single structure and incorporates a first and second positioning boss at both ends. This reduces the amount of assembly gaps while ensuring assembly accuracy and improving the precision of gear transmission.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0006] A speed reducer built into a motor, comprising:

[0007] chassis;

[0008] A partition platform is provided inside the housing and integrally formed therewith, which divides the interior of the housing into a first space and a second space by the action of the partition platform;

[0009] Limiting guide rails are distributed within the first space for positioning and mounting the reducer;

[0010] The reducer includes an integrated gear ring and a gear set;

[0011] The two ends of the reducer are respectively assembled with corresponding partitions and output components to form a positioning for the integrated gear ring.

[0012] Furthermore, the gear set includes a first planetary gear set and a second planetary gear set.

[0013] Furthermore, a first positioning cavity is provided between one end of the integrated gear ring and the outer end of the first planetary gear set, and a second positioning cavity is provided between the other end of the integrated gear ring and the outer end of the second planetary gear set.

[0014] Furthermore, a second positioning boss is formed on one side of the partition platform facing the integrated toothed ring.

[0015] Furthermore, the output component is fixedly installed inside the first space by bolts, and a first positioning boss is formed on one side of the output component facing the integrated toothed ring;

[0016] The first positioning boss and the second positioning boss are respectively interference-fitted to both ends of the integrated gear ring, and the centering of the integrated gear ring can be achieved by the action of the first positioning boss and the second positioning boss.

[0017] Furthermore, the limiting guide rail has a groove inside, and the surface of the integrated toothed ring has a rib that matches the groove. The rib is placed in the corresponding groove to position the integrated toothed ring in the circumferential direction.

[0018] Furthermore, the first planetary gear set includes a first support disk, an outer sun gear, an inner sun gear, and a first planet gear;

[0019] The first planetary gear has three parts, which are arranged in a ring on one side of the first support disk and are movably connected thereto. The outer sun gear meshes with the three first planetary gears. The inner sun gear is fixed to the other side of the first support disk and is coaxial with the outer sun gear.

[0020] Furthermore, the first planetary gear set also includes a positioning disc that is movably connected to the surfaces of the three first planetary gears, and the positioning disc is fixed in contact with the second positioning boss on one side;

[0021] The positioning plate has a through slot for the input shaft to pass through and be assembled and connected to the outer sun gear.

[0022] Furthermore, the second planetary gear set includes a second support disk and a second planetary gear;

[0023] The second planetary gear has three parts, which are arranged in a ring on the second support disk and are movably connected to it. All three second planetary gears mesh with the inner sun gear on the inner side.

[0024] Furthermore, a connecting groove is provided at the center of the second support plate, and the output end of the output component is fixedly assembled with the connecting groove.

[0025] Compared with the prior art, the present invention has the following beneficial effects:

[0026] The reducer built into the motor provided by this utility model replaces the traditional separate first-stage planetary carrier and second-stage planetary carrier with an integrated gear ring. This ensures the structural integration between the first planetary gear set and the second planetary gear set, reducing the increased assembly clearance caused by the separate design, which can easily lead to assembly errors that affect transmission accuracy.

[0027] The first and second positioning bosses, in conjunction with the first and second positioning cavities, allow the integrated gear ring to be stably assembled inside the first space without axial displacement. At the same time, the limiting fit between the rail groove and the rib satisfies the circumferential positioning of the integrated gear ring, thereby further ensuring the stable transmission of the reducer. Attached Figure Description

[0028] Figure 1 A schematic diagram of the structure of the speed reducer built into the motor provided by this utility model;

[0029] Figure 2 A cross-sectional view of the speed reducer built into the motor provided by this utility model;

[0030] Figure 3 A schematic diagram of the housing structure of the reducer built into the motor provided by this utility model;

[0031] Figure 4 A cross-sectional view of the integrated gear ring structure of the reducer built into the motor provided by this utility model;

[0032] Figure 5 The present invention provides a speed reducer built into a motor. Figure 4 Enlarged structural diagram at point A in the middle;

[0033] Figure 6 A side view of the reducer built into the motor provided by this utility model;

[0034] Figure 7 A schematic diagram of the disassembly structure of the speed reducer built into the motor provided by this utility model;

[0035] Figure 8 An exploded structural diagram of the reducer portion built into the motor provided by this utility model;

[0036] Figure 9 A schematic diagram of the gear set structure of the reducer built into the motor provided by this utility model.

[0037] The markings in the diagram are explained as follows:

[0038] Casing 1, First Space 11, Second Space 12;

[0039] Partition 2, Second positioning boss 21;

[0040] Reducer 3, integrated gear ring 31, first planetary gear set 32, second planetary gear set 33, first positioning cavity 34, second positioning cavity 35;

[0041] Ribs 310;

[0042] First support plate 320, outer sun gear 321, inner sun gear 322, first planetary gear 323, positioning plate 324, through slot 325;

[0043] Second support plate 330, second planetary gear 331, connecting groove 332;

[0044] Output component 4, first positioning boss 41, output end 42;

[0045] Limiting guide rail 5, rail groove 51. Detailed Implementation

[0046] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention.

[0047] As described in the background section, the internal gear ring of the conventional motor with a reducer is a split type. That is, when facing the first-stage reduction and the second-stage reduction, the first-stage planetary carrier and the second-stage planetary carrier need to be used separately. Therefore, in the actual application process, the first-stage planetary carrier and the second-stage planetary carrier need to be assembled independently. When the first-stage planetary carrier and the second-stage planetary carrier are assembled independently, assembly gaps will be generated on the left and right sides. Therefore, the independently set first-stage planetary carrier and the second-stage planetary carrier will have gaps in at least four positions. Due to the increase in assembly gaps, in the actual application process, the reducer may have a large assembly error due to the superposition of assembly gaps, which can easily affect the transmission accuracy of the gears.

[0048] To solve this technical problem, this utility model provides a speed reducer built into a motor, which is applied to speed reducers.

[0049] For details, please refer to Figures 1-9 The speed reducer built into the motor specifically includes:

[0050] Casing 1;

[0051] The partition 2 is located inside the housing 1 and integrally formed therewith. The partition 2 divides the interior of the housing 1 into a first space 11 and a second space 12.

[0052] Limiting guide rails 5 are distributed within the first space 11 for positioning and installing the reducer 3;

[0053] The reducer 3 includes an integrated gear ring 31 and a gear set;

[0054] The two ends of the reducer 3 are respectively assembled with the corresponding partition 2 and output component 4 to form a positioning of the integrated gear ring 31.

[0055] The reducer built into the motor provided by this utility model replaces the traditional separate first-stage planetary carrier and second-stage planetary carrier with an integrated gear ring 31. This ensures the structural integration between the first planetary gear set 32 ​​and the second planetary gear set 33, reducing the increased assembly clearance caused by the separate design and the potential for assembly errors that could affect transmission accuracy.

[0056] To enable those skilled in the art to better understand the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.

[0057] It should be noted that, unless otherwise specified, the embodiments and features and technical solutions in the present invention can be combined with each other.

[0058] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0059] Please refer to Figures 1-9 As shown, a speed reducer built into a motor includes: a housing 1; a partition platform 2, which is disposed inside the housing 1 and integrally formed therewith, and the partition platform 2 divides the interior of the housing 1 into a first space 11 and a second space 12; and a limiting guide rail 5, which is distributed in the first space 11 for positioning and installation of the speed reducer 3.

[0060] The reducer 3 includes an integral gear ring 31 and a gear set. The two ends of the reducer 3 are respectively assembled with the corresponding partition 2 and output component 4 to form a positioning of the integral gear ring 31.

[0061] The gear set includes a first planetary gear set 32 ​​and a second planetary gear set 33;

[0062] A first positioning cavity 34 is provided between one end of the integrated gear ring 31 and the outer end of the first planetary gear set 32, and a second positioning cavity 35 is provided between the other end of the integrated gear ring 31 and the outer end of the second planetary gear set 33.

[0063] A second positioning protrusion 21 is formed on one side of the partition platform 2 facing the integrated toothed ring 31;

[0064] The output component 4 is fixedly installed inside the first space 11 by bolts, and a first positioning boss 41 is formed on one side of the output component 4 facing the integrated toothed ring 31.

[0065] The first positioning boss 41 and the second positioning boss 21 are respectively interference-fitted to both ends of the integrated toothed ring 31, and the centering of the integrated toothed ring 31 can be achieved by the action of the first positioning boss 41 and the second positioning boss 21.

[0066] Since the first-stage and second-stage planetary carriers in the traditional reducer have been replaced with an integrated gear ring 31 in this embodiment, the structural integration between the first planetary gear set 32 ​​and the second planetary gear set 33 is ensured. In the actual assembly process, it is only necessary to ensure that the two ends of the integrated gear ring 31 are assembled in place, which reduces the increase in assembly gap caused by the split design and the situation that assembly errors may occur, affecting the transmission accuracy.

[0067] In actual application, the two ends of the integrated gear ring 31 are respectively press-fitted with the corresponding first positioning boss 41 and second positioning boss 21. This restricts the axial positioning function of the integrated gear ring 31 inside the housing 1, ensuring its positioning accuracy and thus meeting the transmission accuracy requirements.

[0068] The reducer built into the motor provided in Example 1 is further optimized, specifically, as follows: Figure 4 As shown, the limiting guide rail 5 has a rail groove 51 inside, and the surface of the integrated toothed ring 31 has a rib 310 that matches the position of the rail groove 51. The rib 310 is placed in the corresponding rail groove 51 to position the integrated toothed ring 31 in the circumferential direction.

[0069] When the reducer 3 is installed inside the first space 11, the ribs 310 on the surface of the reducer 3 are first aligned with the inside of the rail groove 51, and then pushed inward to assemble the reducer 3 into place. The ribs 310 can restrict the positioning of the integrated gear ring 31 in the circumferential direction, thereby cooperating with the axial positioning of the integrated gear ring 31 in Embodiment 1, further improving the overall stability of the integrated gear ring 31 after assembly, and thus ensuring the transmission accuracy in its actual application.

[0070] The reducer built into the motor provided in Embodiment 1 or 2 is further optimized, such as... Figures 1-9 As shown, the first planetary gear set 32 ​​includes a first support disk 320, an outer sun gear 321, an inner sun gear 322, and a first planet gear 323. There are three first planet gears 323, which are arranged in a ring on one side of the first support disk 320 and are movably connected thereto. The outer sun gear 321 meshes with the three first planet gears 323. The inner sun gear 322 is fixed to the other side of the first support disk 320 and is coaxially arranged with the outer sun gear 321.

[0071] The first planetary gear set 32 ​​also includes a positioning disk 324 that is movably connected to the surfaces of the three first planetary gears 323. The positioning disk 324 is fixed in contact with the second positioning boss 21 on one side. Since the positioning disk 324 is fixed in contact with the second positioning boss 21, the first support disk 320 connected to the positioning disk 324 ensures the stability of the connection during use.

[0072] The positioning disk 324 has a through slot 325 for the input shaft to pass through and be assembled and connected with the outer sun gear 321.

[0073] The second planetary gear set 33 includes a second support disk 330 and a second planetary gear 331. There are three second planetary gears 331, which are distributed in a ring on the second support disk 330 and are movably connected thereto. All three second planetary gears 331 mesh with the inner sun gear 322 on the inner side.

[0074] A connecting groove 332 is provided at the center of the second support plate 330, and the output end 42 of the output component 4 is fixedly assembled with the connecting groove 332;

[0075] Specifically, the input shaft (not shown in the figure) in the second space 12 is passed through the partition platform 2 and the through slot 325 and fixed coaxially with the corresponding outer sun gear 321. Then, when installing the input component 4, after the reducer 3 is installed in place, the output end 42 on the output component 4 is fixed with the connecting slot 332 on the second support plate 330. At this time, the first support plate 320 indirectly forms a connection support with the partition platform 2 through the connection of the first planetary gear 323 and the positioning plate 324, while the second support plate 330 indirectly forms a connection support with the output component 4 through the connecting slot 332.

[0076] When the input shaft (not shown in the figure) in the second space 12 is driven, the outer sun gear 321 will rotate and promote the meshing of the first planetary gear 323 on its outer side. The first planetary gear 323, which is driven by the transmission, will rotate through the meshing of the integrated gear ring 31 and drive the first support disk 320 to rotate. The rotation of the first support disk 320 will drive the inner sun gear 322 on it to rotate. Since the inner sun gear 322 meshes with multiple second planetary gears 331, the multiple second planetary gears 331 will also rotate and drive the second support disk 330 to rotate through the meshing of the integrated gear ring 31. Through the above process, the deceleration effect of the input shaft is completed, and finally the power is output through the output end 42 connected to the connecting groove 332.

[0077] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0078] Obviously, the embodiments described above are only some embodiments of this utility model, not all embodiments. The accompanying drawings show preferred embodiments of this utility model, but do not limit the patent scope of this utility model. This utility model can be implemented in many different forms; rather, the purpose of providing these embodiments is to provide a more thorough and comprehensive understanding of the disclosure of this utility model. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing specific embodiments, or make equivalent substitutions for some of the technical features. Any equivalent structures made using the content of this utility model specification and drawings, directly or indirectly applied to other related technical fields, are similarly within the patent protection scope of this utility model.

Claims

1. A speed reducer built into a motor, characterized in that, It includes: Casing (1); The partition (2) is located inside the housing (1) and integrally formed therewith. The partition (2) divides the interior of the housing (1) into a first space (11) and a second space (12). Limiting guide rails (5) are distributed in the first space (11) for positioning and installation of the reducer (3); The reducer (3) includes an integral gear ring (31) and a gear set; The two ends of the reducer (3) are respectively assembled with the corresponding partition (2) and output component (4) to form the positioning of the integrated gear ring (31).

2. The reducer built into the motor according to claim 1, characterized in that, The gear set includes a first planetary gear set (32) and a second planetary gear set (33).

3. The reducer built into the motor according to claim 2, characterized in that, A first positioning cavity (34) is provided between one end of the integrated gear ring (31) and the outer end of the first planetary gear set (32), and a second positioning cavity (35) is provided between the other end of the integrated gear ring (31) and the outer end of the second planetary gear set (33).

4. The reducer built into the motor according to claim 3, characterized in that, The partition (2) has a second positioning boss (21) formed on one side facing the integrated toothed ring (31).

5. The reducer built into the motor according to claim 4, characterized in that, The output component (4) is fixedly installed inside the first space (11) by bolts, and a first positioning boss (41) is formed on one side of the output component (4) facing the integrated toothed ring (31). The first positioning boss (41) and the second positioning boss (21) are respectively interference-fitted to the two ends of the integrated gear ring (31). The centering of the integrated gear ring (31) can be achieved by the action of the first positioning boss (41) and the second positioning boss (21).

6. The reducer built into the motor according to claim 1, characterized in that, The limiting guide rail (5) has a rail groove (51) inside. The surface of the integrated toothed ring (31) has a rib (310) that matches the position of the rail groove (51). The rib (310) is placed in the corresponding rail groove (51) to position the integrated toothed ring (31) in the circumferential direction.

7. The reducer built into the motor according to claim 5, characterized in that, The first planetary gear set (32) includes a first support disk (320), an outer sun gear (321), an inner sun gear (322), and a first planet gear (323). The first planetary gear (323) has three parts, which are arranged in a ring on one side of the first support disk (320) and are movably connected thereto. The outer sun gear (321) is engaged with the three first planetary gears (323). The inner sun gear (322) is fixed to the other side of the first support disk (320) and is coaxially arranged with the outer sun gear (321).

8. The reducer built into the motor according to claim 7, characterized in that, The first planetary gear set (32) also includes a positioning disk (324) that is movably connected to the surfaces of the three first planetary gears (323), and the positioning disk (324) is fixed in contact with the second positioning boss (21) on one side; The positioning disk (324) has a through slot (325) for the input shaft to pass through and be assembled and connected with the outer sun gear (321).

9. The speed reducer built into the motor according to claim 8, characterized in that, The second planetary gear set (33) includes a second support disk (330) and a second planetary gear (331); Among them, there are three second planetary gears (331), which are distributed in a ring on the second support disk (330) and are movably connected thereto, and all three second planetary gears (331) are engaged with the inner sun gear (322) on the inner side.

10. The reducer built into the motor according to claim 9, characterized in that, A connecting groove (332) is provided at the center of the second support plate (330), and the output end (42) of the output component (4) is fixedly assembled with the connecting groove (332).

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