Rotary transformer mounting structure of oil-cooled motor

Abstract

The utility model relates to an oil-cooled motor rotary transformer installation structure, which comprises a motor rear end cover, a rotary transformer stator installed on the inner side of the motor rear end cover, a rotary transformer rotor arranged on the inner side of the rotary transformer stator, and a motor shaft arranged on the inner side of the rotary transformer rotor. And the pressing ring is arranged on the outer side of the rotary transformer stator in a sleeving manner, and the pressing ring abuts against one side of the rotary transformer stator and one side of the motor rear end cover in the axial direction of the rotary transformer stator. According to the rotary transformer installation structure, the compression ring is adopted to abut against the rotary transformer stator and the motor rear end cover, so that the rotary transformer stator is limited in the axial direction, the compression ring replaces an original bolt, large installation space does not need to be reserved, the axial length of the motor is shortened, and the arrangement space of the rotary transformer installation structure is optimized.

Description

Technical Field

[0001] The utility model relates to the field of oil-cooled motor manufacturing, in particular to an oil-cooled motor resolver installation structure. Background Art

[0002] Oil-cooled motors achieve cooling effects by circulating cooling oil in the motor. After a round of circulation in the motor, the oil is collected in the oil pan at the bottom of the motor, then enters the casing oil channel, and then enters the bearing chamber, enters the stator spray oil, and enters the rotor oil through the motor shaft to achieve cooling. In the resolver installation structure of the oil-cooled motor, the resolver stator is usually fixed to the rear end cover by locking bolts, so space for the installation bolts needs to be reserved inside the motor. Since the bolts themselves are long, the axial length of the motor is increased. Utility Model Content

[0003] Based on the above description, the utility model provides an oil-cooled motor resolver installation structure to solve the problem in the related art that space for mounting bolts needs to be reserved inside the motor, thereby increasing the axial length of the motor.

[0004] The utility model solves the above-mentioned technical problem with the following technical solution: an oil-cooled motor resolver installation structure, comprising: a motor rear end cover, on the inner side of which a resolver stator is installed, on the inner side of the resolver stator a resolver rotor is arranged, on the inner side of the resolver rotor a motor shaft is arranged; a pressure ring, which is sleeved on the outer side of the resolver stator, and the pressure ring abuts against the resolver stator and one side of the motor rear end cover along the axial direction of the resolver stator.

[0005] On the basis of the above technical solution, the present invention can also be improved as follows.

[0006] Furthermore, a first oil passage is provided on the rear end cover of the motor, a second oil passage is provided on the pressure ring, the first oil passage is communicated with the second oil passage, and the second oil passage is communicated with the interior of the rear end cover of the motor.

[0007] Furthermore, a bearing is installed inside the rear end cover of the motor, the second oil channel is arranged at an angle, and the outlet is located above the bearing.

[0008] Furthermore, a bearing chamber base is installed above the bearing, and the pressure ring abuts against the top of the bearing chamber base through a wave spring washer.

[0009] Furthermore, the second oil channel is arranged on one side of the pressure ring.

[0010] Furthermore, a boss is provided on the inner side of the rear end cover of the motor, the resolver stator is mounted on the boss, and the top of the pressure ring abuts against the connection between the boss and the resolver stator.

[0011] Further, one side of the resolver stator away from the motor shaft abuts against one side of the inner part of the motor rear end cover connected to the boss.

[0012] Further, the press ring is in interference fit with the resolver stator.

[0013] Further, the press ring is in interference fit with the motor rear end cover.

[0014] Further, the press ring is coaxially arranged with the resolver stator.

[0015] Compared with the prior art, the technical solution of the present application has the following beneficial technical effects:

[0016] By using the press ring to abut against the resolver stator and the motor rear end cover, the resolver stator is axially limited. The press ring replaces the original bolt, eliminating the need to reserve a large installation space, thus shortening the axial length of the motor and optimizing the layout space of the resolver installation structure. Description of the Drawings

[0017] Figure 1 FIG. is a partial structural schematic diagram of the resolver installation structure of the oil-cooled motor provided by the embodiment of the present utility model;

[0018] Figure 2 FIG. is the overall structural schematic diagram of the resolver installation structure of the oil-cooled motor provided by the embodiment of the present utility model.

[0019] In the drawings, the list of components represented by each reference numeral is as follows:

[0020] 1. Motor rear end cover; 11. First oil passage; 12. Boss; 2. Resolver stator; 3. Resolver rotor; 4. Press ring; 41. Second oil passage; 5. Motor shaft; 6. Bearing; 7. Bearing chamber base. Detailed Embodiments

[0021] To facilitate the understanding of the present application, the present application will be described more comprehensively below with reference to the relevant drawings. Embodiments of the present application are shown in the drawings. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, these embodiments are provided to make the disclosure of the present application more thorough and comprehensive.

[0022] The embodiment of the present utility model provides a resolver installation structure for an oil-cooled motor, which can solve the problem in the related art that a space for installing bolts needs to be reserved inside the motor, increasing the axial length of the motor.

[0023] See Figure 1 and Figure 2As shown in the figure, a resolver installation structure for an oil-cooled motor provided by an embodiment of the present invention may include: a motor rear end cover 1, with a resolver stator 2 installed inside. A resolver rotor 3 is arranged inside the resolver stator 2, and a motor shaft 5 is arranged inside the resolver rotor 3. The resolver stator 2, the resolver rotor 3, and the motor shaft 5 are coaxially installed from outside to inside; a retaining ring 4, which is sleeved outside the resolver stator 2, and the retaining ring 4 axially abuts against one side of the resolver stator 2 and the motor rear end cover 1. In this embodiment, the end of the resolver stator 2 is installed inside the motor rear end cover 1. By using the retaining ring 4 to abut against the resolver stator 2 and the motor rear end cover, the retaining ring 4 presses the resolver stator 2 tightly, thereby axially limiting the resolver stator 2. The retaining ring 4 replaces the original bolt, eliminating the need to reserve a large installation space, thus shortening the axial length of the motor and optimizing the layout space of the resolver installation structure.

[0024] See Figure 1 As shown in the figure, further, a first oil passage 11 is provided on the motor rear end cover 1, a second oil passage 41 is opened on the retaining ring 4, the first oil passage 11 is communicated with the second oil passage 41, and the second oil passage 41 is communicated with the inside of the motor rear end cover 1. In this embodiment, by providing the first oil passage 11 on the motor rear end cover 1, the cooling oil enters from the first oil passage 11 and then enters the bearing chamber through the second oil passage 41, thereby lubricating and cooling the bearing and facilitating the heat dissipation of the motor.

[0025] See Figure 1 As shown in the figure, in some alternative embodiments, a bearing 6 is installed inside the motor rear end cover 1, the second oil passage 41 is inclined, and the outlet is located above the bearing 6. In this embodiment, by arranging the second oil passage 41 above the bearing 6, the cooling oil can enter the bearing 6 from the second oil passage 41, thereby providing lubrication for the bearing 6. In other embodiments, the second oil passage 41 can also be arranged in other directions to provide lubrication for other components of the motor.

[0026] See Figure 1 and Figure 2 As shown in the figure, in some embodiments, a bearing chamber base 7 is installed above the bearing 6, and the retaining ring 4 abuts against the top of the bearing chamber base 7 through a wave spring washer. In this embodiment, the bottom of the bearing chamber base 7 abuts against the top of the bearing 6, and the bottom of the retaining ring 4 abuts against the top of the bearing chamber base 7 through a wave spring washer, providing a preloading support for the bearing 6.

[0027] See Figure 1 As shown in the figure, preferably, the second oil passage 41 is arranged on one side of the retaining ring 4. In this embodiment, the second oil passage 41 is arranged on the side of the retaining ring 4 close to the bearing 6, which is convenient for processing and can shorten the oil path.

[0028] See Figure 1 As shown, preferably, a boss 12 is provided inside the motor rear end cover 1, the resolver stator 2 is installed on the boss 12, and the top of the retaining ring 4 abuts against the junction of the boss 12 and the resolver stator 2. In this embodiment, the resolver stator 2 is installed on the boss 12, the bottom of the resolver stator 2 is flush with the bottom of the boss 12, and the top of the retaining ring 4 abuts against the junction of the boss 12 and the resolver stator 2, providing an axial pre-tightening force to the resolver stator 2 and restricting the resolver stator 2 between the boss 12 and the retaining ring 4, resulting in a better limiting effect.

[0029] In other embodiments, the inner side of the motor rear end cover 1 can also be planar, and the retaining ring 4 can also entirely abut against the end of the resolver stator 2 or other positions of the resolver stator 2.

[0030] See Figure 1 As shown, in some embodiments, the side of the resolver stator 2 away from the motor shaft 5 abuts against the side of the motor rear end cover 1 connected to the boss 12. In this embodiment, the bottom of the boss 12 and the inner side of the motor rear end cover 1 form a right-angled step, and the retaining ring 4 just abuts against two adjacent right-angled sides of the step, ensuring the stability of the retaining ring 4 and thus further improving the limiting effect on the resolver stator 2.

[0031] See Figure 1 As shown, preferably, the retaining ring 4 and the resolver stator 2 are in interference fit. In this embodiment, when the retaining ring 4 is installed on the resolver stator 2, an interference fit is adopted, which has a simple structure, good centering between the retaining ring 4 and the resolver stator 2, and increases the bearing capacity of the retaining ring 4.

[0032] See Figure 1 As shown, preferably, the retaining ring 4 and the motor rear end cover 1 are in interference fit. In this embodiment, when the retaining ring 4 is installed on the motor rear end cover 1, an interference fit is adopted, which has a simple structure, good centering between the retaining ring 4 and the motor rear end cover 1, and increases the bearing capacity of the retaining ring 4.

[0033] See Figure 1 As shown, preferably, the retaining ring 4 and the resolver stator 2 are coaxially arranged, which is convenient for installation and has good bearing capacity.

[0034] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which this application belongs. The terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application.

[0035] It will be appreciated that spatial relationship terms such as "under", "below", "beneath", "underneath", "above", "over", etc. may be used herein to describe the relationship of one element or feature shown in the figures to other elements or features. It should be understood that, in addition to the orientations shown in the figures, spatial relationship terms also include different orientations of the device in use and operation. For example, if the device in the figures is flipped, an element or feature described as "under other elements" or "beneath them" or "underneath them" will be oriented "above" the other elements or features. Thus, the exemplary terms "under" and "beneath" can include both an upper and a lower orientation. In addition, the device may also include additional orientations (such as, rotated 90 degrees or other orientations), and the spatial descriptors used herein are to be interpreted accordingly.

[0036] It should be noted that when an element is considered to be "connected" to another element, it can be directly connected to the other element or connected to the other element through an intermediate element. In the following embodiments, "connection", if there is a transfer of electrical signals or data between the connected circuits, modules, units, etc., should be understood as "electrical connection", "communication connection", etc.

[0037] As used herein, the singular forms "a", "an" and "the" may also include the plural forms unless the context clearly dictates otherwise. It should also be understood that the terms "comprise / include" or "have" etc. specify the presence of the stated features, wholes, steps, operations, components, parts or combinations thereof, but do not preclude the possibility of the presence or addition of one or more other features, wholes, steps, operations, components, parts or combinations thereof.

[0038] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. An oil-cooled motor resolver installation structure, characterized in that: It includes: A rear end cover (1) of the motor has a resolver stator (2) mounted on its inner side, a resolver rotor (3) is arranged on the inner side of the resolver stator (2), and a motor shaft (5) is arranged on the inner side of the resolver rotor (3); A pressure ring (4) is sleeved on the outer side of the resolver stator (2), and the pressure ring (4) abuts against the resolver stator (2) and one side of the rear end cover (1) of the motor along the axial direction of the resolver stator (2).

2. The oil-cooled motor resolver installation structure according to claim 1 is characterized in that: The motor rear end cover (1) is provided with a first oil passage (11), the pressure ring (4) is provided with a second oil passage (41), the first oil passage (11) is communicated with the second oil passage (41), and the second oil passage (41) is communicated with the interior of the motor rear end cover (1).

3. The oil-cooled motor resolver installation structure according to claim 2 is characterized in that: A bearing (6) is installed inside the rear end cover (1) of the motor, and the second oil passage (41) is arranged at an angle, with the outlet located above the bearing (6).

4. The oil-cooled motor resolver installation structure according to claim 3 is characterized in that: A bearing chamber base (7) is installed above the bearing (6), and the pressure ring (4) abuts against the top of the bearing chamber base (7) via a wave spring washer.

5. The oil-cooled motor resolver installation structure according to claim 2 is characterized in that: The second oil channel (41) is arranged on one side of the pressure ring (4).

6. The oil-cooled motor resolver installation structure according to claim 1, characterized in that: A boss (12) is provided on the inner side of the rear end cover (1) of the motor, the resolver stator (2) is mounted on the boss (12), and the top of the pressure ring (4) abuts against the connection between the boss (12) and the resolver stator (2).

7. The oil-cooled motor resolver installation structure according to claim 6, characterized in that: The side of the rotary transformer stator (2) away from the motor shaft (5) abuts against the side of the motor rear end cover (1) connected to the boss (12).

8. The oil-cooled motor resolver installation structure according to claim 1, characterized in that: The pressure ring (4) is interference fit with the rotary stator (2).

9. The oil-cooled motor resolver installation structure according to claim 1, characterized in that: The pressure ring (4) is interference fit with the rear end cover (1) of the motor.

10. The oil-cooled motor resolver installation structure according to claim 1, characterized in that: The pressure ring (4) is coaxially arranged with the resolver stator (2).

Images