External rotor motor with detachable chain wheel

Abstract

The utility model discloses an external rotor motor with a detachable chain wheel, which relates to the field of external rotor motors, and comprises a stator main shaft and a rotor device, one end of the rotor device is fixedly provided with an end cover device, the end cover device comprises an end cover, and the center of the outer side surface of the end cover is provided with a connecting table. A mounting circular groove concentric with the stator main shaft is formed in the center of the connecting table, a mounting base device is connected in the mounting circular groove and comprises a mounting base, a concentric first shaft sleeve is arranged on the inner side of the mounting base, a concentric second shaft sleeve is arranged on the outer side of the mounting base, and a concentric outer spline shaft is fixedly connected to the outer side of the second shaft sleeve; according to the device, the installation base device is arranged, the installation base device is detachably installed on the end cover shell, the chain wheel is detachably installed on the installation base device, and the chain wheel is matched with the sealing ring and the framework oil seal; and the sealing performance and the later maintenance performance of the motor are greatly improved.

Description

An external rotor motor with a detachable sprocket Technical Field

[0001] This utility model belongs to the field of external rotor motors, and specifically relates to an external rotor motor with a detachable sprocket. Background Technology

[0002] An external rotor motor is a special type of motor. Unlike traditional internal rotor motors, its rotor is located outside the stator and is usually directly connected to the housing. Due to its advantages such as high torque and good heat dissipation, external rotor motors are widely used in fans, electric vehicles, and industrial equipment.

[0003] Chinese Patent Application No. CN202323117402.3 discloses an external rotor motor, including a motor shaft, a stator assembly, a rotor assembly, and an assembly component. The stator assembly is mounted on the motor shaft and inside the rotor assembly. The assembly component is mounted on the output portion of the motor shaft. The assembly component includes a retaining ring, a bearing, a pulley, a housing, and an end cover. The end cover is rotatably mounted on the motor shaft, the pulley is mounted on the output end of the motor shaft, the bearing is mounted in the middle of the motor shaft, the retaining ring is mounted close to the bearing and is secured to the motor shaft, and the housing is mounted on the rotor assembly. The housing and the end cover are fastened together by bolts. This external rotor motor has a reasonable structure, making it more convenient for customers to install and maintain the motor. However, the pulley of the aforementioned external rotor motor is threadedly connected to the motor shaft, which is in turn fixedly connected to the stator assembly. In order to drive the pulley, the rotor assembly needs to be fixed, which in turn causes the stator assembly to rotate. This not only makes the external structure of the device complex, but also greatly negates the high torque advantage of the external rotor motor and seriously affects the output efficiency of the external rotor motor. To solve this problem, the current solution is to directly fix the pulley and other transmission components to the end cover housing. However, this will reduce the overall sealing of the motor and make it difficult to maintain in the future. Summary of the Invention

[0004] To address the problems mentioned in the background art, this utility model provides an external rotor motor with a detachable sprocket and a mounting base device. The mounting base device is detachably mounted on the end cover housing, and the sprocket is detachably mounted on the mounting base device, which greatly improves the motor's sealing performance and subsequent maintenance.

[0005] To achieve the above objectives, the specific technical solution of this utility model is as follows:

[0006] An external rotor motor with a detachable sprocket includes a stator spindle and a rotor assembly. An end cover device is fixedly installed at one end of the rotor assembly. The end cover device includes an end cover, and a connecting platform is provided at the center of the outer side of the end cover. A mounting groove concentric with the stator spindle is provided at the center of the connecting platform. A mounting base device is connected in the mounting groove. The mounting base device includes a mounting base, and a first concentric bushing is provided on the inner side of the mounting base. A second concentric bushing is provided on the outer side of the second bushing. A concentric external spline shaft is fixedly connected to the outer spline shaft. A sprocket is fitted onto the external spline shaft. The sprocket is axially positioned on the external spline shaft by a shaft retaining ring.

[0007] As a further feature of the above solution, a sealing ring is provided in the mounting groove, and locking screw holes are provided on the connecting platform in a circular pattern, with the outer wall of the first bushing being sealed to the sealing ring.

[0008] As a further feature of the above solution, the outer edge of the mounting base is provided with circumferentially distributed connecting ears, which are distributed correspondingly with locking screw holes. Bolts are provided inside the connecting ears, and the bolts are connected to the locking screw holes. The mounting base is assembled into the mounting groove through the first bushing. The bolts pass through the connecting ears and connect with the locking screw holes. By tightening the bolts, the mounting base is fixed on the end cover.

[0009] As a further feature of the above solution, a locking ring groove is provided on the spline teeth of the external spline shaft, and an internal spline groove is provided on the inner wall of the sprocket. The internal spline groove is connected to the external spline shaft, and the shaft retaining ring is engaged in the locking ring groove. In conjunction with the internal spline groove, the sprocket is positioned and fixed on the external spline shaft. The sprocket can be easily disassembled by removing the shaft retaining ring.

[0010] As a further provision of the above scheme, the inner wall of the first bushing is provided with a bearing, the inner wall of the outer spline shaft is provided with a skeleton oil seal, the bearing is connected to the stator spindle, and the skeleton oil seal is connected to the stator spindle for rotational sealing.

[0011] This utility model has the following beneficial effects:

[0012] A mounting base device is provided, which can be detachably installed on the end cover device. It works in conjunction with the mounting groove, sealing ring, bearing, and skeleton oil seal to improve the motor's sealing performance. An external spline shaft is provided on the outer side of the mounting base device. The sprocket is assembled on the external spline shaft and, in conjunction with the internal spline groove, the sprocket is positioned and fixed on the external spline shaft. This allows for simple and convenient detachable installation of the sprocket on the mounting base device, greatly improving the motor's future maintainability. Attached Figure Description

[0013] Figure 1 is a schematic diagram of the appearance of this utility model;

[0014] Figure 2 is a schematic diagram of the end cap device of this utility model;

[0015] Figure 3 is a schematic diagram of the mounting base device of this utility model;

[0016] Figure 4 is a cross-sectional schematic diagram of the mounting base device of this utility model;

[0017] Figure 5 is a schematic diagram of the sprocket of this utility model.

[0018] 1. Stator spindle; 2. Rotor assembly; 3. End cover assembly; 4. Mounting base assembly; 5. Sprocket; 6. Shaft retaining ring; 301. End cover; 302. Connecting platform; 303. Mounting groove; 304. Sealing ring; 305. Locking screw hole; 401. Mounting base; 402. Connecting lug; 4021. Bolt; 403. First bushing; 404. Bearing; 405. Second bushing; 406. External splined shaft; 407. Skeleton oil seal; 408. Locking ring groove; 501. Internal spline groove. Detailed Implementation

[0019] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0020] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present application will now be described in detail with reference to Figures 1-5 and the embodiments.

[0021] An external rotor motor with a detachable sprocket includes a stator spindle 1 and a rotor assembly 2. An end cover assembly 3 is fixedly installed at one end of the rotor assembly 2. The end cover assembly 3 includes an end cover 301. A connecting platform 302 is provided at the center of the outer side of the end cover 301. A mounting groove 303 concentric with the stator spindle is provided at the center of the connecting platform 302. A mounting base assembly 4 is connected in the mounting groove 303. The mounting base assembly 4 includes a mounting base 401. A first bushing 403 concentrically located on the inner side of the mounting base 401 is provided, and a second bushing 405 concentrically located on the outer side is provided. A concentric external spline shaft 406 is fixedly connected to the outer side of the second bushing 402. A sprocket 5 is fitted onto the external spline shaft 406. The sprocket 5 is axially positioned on the external spline shaft 406 by a shaft retaining ring 6.

[0022] As shown in Figures 2 and 4, a sealing ring 304 is provided in the mounting groove 303, and a locking screw hole 305 is provided on the connecting platform 302. The outer wall of the first bushing 403 is sealed to the sealing ring 304.

[0023] As shown in Figures 3, 4, and 5, the outer edge of the mounting base 401 is provided with circumferentially distributed connecting ears 402, which correspond to the locking screw holes 305. Bolts 4021 are provided in the connecting ears 402, and the bolts 4021 are connected to the locking screw holes 305. The mounting base 401 is assembled into the mounting groove 303 through the first bushing 403. The bolts 4021 pass through the connecting ears 402 and are connected to the locking screw holes 305. Tightening the bolts 4021 fixes the mounting base 401 onto the end cover 301.

[0024] The splined shaft 406 has a locking ring groove 408 on its splined teeth, and the sprocket 5 has an inner spline groove 501 on its inner wall. The inner spline groove 501 is connected to the outer splined shaft 406. The shaft retaining ring 6 is engaged in the locking ring groove 408 and, together with the inner spline groove 501, positions and fixes the sprocket 6 on the outer splined shaft 406. The sprocket 5 can be easily disassembled by removing the shaft retaining ring 6. The inner wall of the first bushing 403 is provided with a bearing 404, and the inner wall of the outer splined shaft 406 is provided with a skeleton oil seal 407. The bearing 404 is connected to the stator spindle 1, and the skeleton oil seal 407 is rotatably sealed to the stator spindle 1.

[0025] The working principle of this utility model is as follows: The mounting base 401 is assembled into the mounting groove 303 through the first bushing 403. The bolt 4021 passes through the connecting ear 402 and connects with the locking screw hole 305. Tightening the bolt 4021 fixes the mounting base 401 onto the end cover 301. The outer wall of the first bushing 403 is sealed to the sealing ring 304 to ensure the sealing between the mounting base device 4 and the end cover device 3. At this time, the bearing 404 is connected to the stator spindle 1, and the skeleton oil seal 407 is connected to the stator spindle 1 for rotational sealing to ensure the overall sealing of the motor. The inner spline groove 501 is connected to the outer spline shaft 406. The shaft retaining ring 6 is engaged in the locking ring groove 408, forcing the sprocket 5 to abut against the outer end face of the second bushing 405, positioning and fixing the sprocket 5 on the outer spline shaft 406. The sprocket 5 is easy and quick to disassemble and assemble, improving the later maintenance of the motor, and will not affect the overall sealing of the motor.

[0026] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. It will be apparent to those skilled in the art that this utility model is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects. The scope of this utility model is defined by the appended claims rather than the foregoing description, and thus all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this utility model.

[0027] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This way of describing the specification is only for clarity. The technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. An external rotor motor with a detachable sprocket, comprising a stator shaft and a rotor assembly, wherein an end cover is fixedly mounted on one end of the rotor assembly, characterized in that, The end cover device includes an end cover, a connecting platform is provided at the center of the outer side of the end cover, and a mounting groove concentric with the stator spindle is provided at the center of the connecting platform. A mounting base device is connected in the mounting groove. The mounting base device includes a mounting base, a first bushing concentrically provided on the inner side of the mounting base, and a second bushing concentrically provided on the outer side. A concentric external spline shaft is fixedly connected to the outer side of the second bushing. A sprocket is fitted onto the external spline shaft. The sprocket is axially positioned on the external spline shaft by a shaft retaining ring.

2. The external rotor motor with a detachable sprocket according to claim 1, characterized in that, A sealing ring is provided in the mounting groove, and locking screw holes are provided on the connecting platform in a circular pattern. The outer wall of the first bushing is sealed to the sealing ring.

3. The external rotor motor with a detachable sprocket according to claim 2, characterized in that, The mounting base has circumferentially distributed connecting ears on its outer edge, which correspond to locking screw holes. Bolts are installed inside the connecting ears and are connected to the locking screw holes. The mounting base is assembled into the mounting groove through the first bushing.

4. The external rotor motor with a detachable sprocket according to claim 1, characterized in that, The external spline shaft has a locking ring groove on its spline teeth, and the sprocket has an internal spline groove on its inner wall. The internal spline groove is connected to the external spline shaft, and the shaft is secured in the locking ring groove with a retaining ring.

5. The external rotor motor with a detachable sprocket according to claim 1, characterized in that, The first bushing has a bearing on its inner wall and a skeleton oil seal on its inner wall. The bearing is connected to the stator spindle and the skeleton oil seal is connected to the stator spindle for rotational sealing.

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