Electric device and damper thereof

Abstract

The utility model discloses an electric device and a damper thereof, the electric device comprises a shell and a core body arranged in the shell, the core body comprises a first inner core and a second inner core, the first inner core is provided with a shaft hole used for being fixedly connected with a motor shaft or a spline shaft, and the first inner core and the second inner core are arranged in a relative rotation mode to form a damping cavity. The damping cavity is filled with damping oil. The connecting cover can be detachably connected with the motor shell or the machine head shell, when the connecting cover is connected with the motor shell, the first inner core is fixedly connected with the motor shaft, the motor shaft drives the first inner core to rotate synchronously, when the connecting cover is connected with the machine head shell, the first inner core is fixedly connected with a spline shaft of the machine head, and when the spline shaft rotates along with the input shaft, the first inner core rotates synchronously. The spline shaft drives the first inner core to rotate synchronously, and the damping oil and the second inner core rub against the first inner core to generate resistance, so that constant load can be provided, stability in the testing process is ensured, and the requirement of an electromagnetic compatibility test of a motor or a machine head is met.

Description

Technical Field

[0001] The utility model relates to the technical field of motors, in particular to an electric device and a damper thereof. Background Art

[0002] During the development and production of electric devices, various tests are required to ensure their performance and quality. Among them, the electromagnetic compatibility test is an important test that aims to evaluate the device's anti-interference ability in an electromagnetic environment and the degree of radiation to external electromagnetic fields. When conducting this test, it is necessary to provide a constant load for the electric device to simulate the working state under actual use, so as to accurately evaluate its electromagnetic compatibility performance. In order to prevent the loading device from affecting the results of the electromagnetic compatibility test of the sample itself, the load fixture must be a non-electrical device, and the load device of the traditional electric device generally uses an electromagnetic brake, such as a motor. The electromagnetic brake can be powered on after the motor is turned off to pinch the motor shaft to achieve a braking effect, and the use of the electromagnetic brake requires power, which does not meet the requirements of the load fixture as a non-electrical device. Utility Model Content

[0003] In view of the above problems, the utility model proposes an electric device and a damper thereof, which achieves a damping effect on the rotation of the motor or the head of the electric device by friction between damping oil and the second inner core and the first inner core to generate resistance.

[0004] The technical solution adopted by the utility model is as follows: a damper includes a shell and a core body arranged inside the shell, the core body includes a first inner core and a second inner core, the first inner core is provided with an axial hole for fixed connection with a motor shaft or a spline shaft, the first inner core and the second inner core are relatively rotated to form a damping cavity, and the damping cavity is filled with damping oil. The damping oil can be silicone oil.

[0005] Optionally, the first inner core is provided with a plurality of annular grooves in sequence from the axial hole to the edge, and the second inner core is provided with a plurality of annular protrusions, and the plurality of annular protrusions are inserted into the plurality of annular grooves in a one-to-one correspondence.

[0006] Optionally, the annular bulge is provided with a plurality of grooves spaced apart along the circumferential direction, and the grooves are staggered with the grooves on the adjacent second annular bulge.

[0007] Optionally, the first inner core is provided with a plurality of oil grooves, and the oil grooves are connected to the annular grooves.

[0008] Optionally, the shell includes a first shell and a second shell cooperatively connected to the first shell, the first inner core rotates with the first shell and is located inside the first shell, and the second inner core is fixedly connected to the second shell.

[0009] Optionally, a limiting protrusion is provided on a side of the second inner core facing the second shell, and the second shell is provided with a limiting groove that cooperates with the limiting protrusion.

[0010] Optionally, the first shell is provided with a plurality of latching protrusions along the circumferential direction, and the second shell is provided with a plurality of latching grooves cooperating with the latching protrusions along the circumferential direction.

[0011] Optionally, the first shell is provided with a hanging ear, and the hanging ear is provided with a screw hole for connecting with the connection cover.

[0012] The utility model also discloses an electric device, comprising a connection cover and at least one damper as mentioned above, wherein the connection cover is used for detachably connecting with a motor housing or a head housing.

[0013] Optionally, there are multiple dampers, and the multiple dampers are sequentially stacked and installed on the connection cover.

[0014] The beneficial effects of the utility model are as follows: the connecting cover can be detachably connected to the motor housing or the machine head housing; when the connecting cover is connected to the motor housing, the first inner core is fixedly connected to the motor shaft, and the motor shaft drives the first inner core to rotate synchronously; when the connecting cover is connected to the machine head housing, the first inner core is fixedly connected to the spline shaft of the machine head; when the spline shaft rotates with the input shaft, the spline shaft drives the first inner core to rotate synchronously; the damping oil and the second inner core rub against the first inner core to generate resistance, which can provide a constant load, achieve a damping effect on the rotation of the motor or machine head, ensure stability during the test, and meet the requirements of the electromagnetic compatibility test of the motor or machine head. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 A schematic diagram of the structure of the damper proposed in the embodiment of the utility model;

[0016] Figure 2 An exploded view of a damper provided in an embodiment of the utility model;

[0017] Figure 3 A schematic diagram of a second inner core of a damper provided in an embodiment of the utility model;

[0018] Figure 4 A schematic diagram of a first inner core of a damper provided in an embodiment of the utility model;

[0019] Figure 5 A schematic diagram of the assembly of the connection cover and the motor housing according to an embodiment of the utility model;

[0020] Figure 6 A schematic diagram of the assembly of the connection cover and the head housing according to an embodiment of the utility model;

[0021] Figure 7 This is a schematic diagram of multiple dampers used in series according to an embodiment of the utility model.

[0022] The marks in the accompanying drawings are: 1. first inner core; 11. annular groove; 12. oil groove; 13. shaft hole; 2. second inner core; 21. annular convex; 22. groove; 23. limiting protrusion; 3. first shell; 31. clamping convex; 32. hanging ear; 33. screw hole; 4. second shell; 41. limiting groove; 42. clamping groove; 5. through hole; 6. connecting cover; 7. motor shaft; 8. screw; 9. spline shaft. DETAILED DESCRIPTION

[0023] The utility model is described in detail below in conjunction with the accompanying drawings.

[0024] like Figures 1 to 5 As shown, a damper comprises a housing and a core body arranged inside the housing, the core body comprises a first inner core 1 and a second inner core 2, the first inner core 1 is provided with an axial hole 13 for being fixedly connected with a motor shaft 7 or a spline shaft 9, the first inner core 1 and the second inner core 2 are arranged to rotate relative to each other to form a damping chamber, and the damping chamber is filled with damping oil. The connecting cover 6 can be detachably connected with the motor housing or the head housing, when the connecting cover 6 is connected with the motor housing, the first inner core 1 is fixedly connected with the motor shaft 7, the motor shaft 7 drives the first inner core 1 to rotate synchronously, when the connecting cover 6 is connected with the head housing, the first inner core 1 is fixedly connected with the spline shaft 9 of the head, when the spline shaft 9 rotates with the input shaft, the spline shaft 9 drives the first inner core 1 to rotate synchronously, the damping oil and the second inner core 2 rub against the first inner core 1 to generate resistance, which can provide a constant load, realize the damping effect on the rotation of the motor or the head, ensure stability during the test process, and meet the requirements of the electromagnetic compatibility test of the motor or the head.

[0025] In this embodiment, if Figure 2 and 3 As shown, the first inner core 1 is provided with a plurality of annular grooves 11 in sequence from the shaft hole 13 to the edge, and the second inner core 2 is provided with a plurality of annular protrusions 21, which are inserted into the plurality of annular grooves 11 in a one-to-one correspondence. The relative movement of the annular protrusions 21 and the annular grooves 11 generates friction.

[0026] In this embodiment, if Figure 3 As shown, the annular protrusion 21 is provided with a plurality of grooves 22 at intervals along the circumferential direction, and the grooves 22 are arranged alternately with the grooves 22 on the adjacent second annular protrusion 21. Since the damping oil is relatively viscous, when the annular protrusion 21 and the annular groove 11 move relative to each other, the grooves 22 on the annular protrusion 21 shear the damping oil.

[0027] In this embodiment, if Figure 4 As shown, the first inner core 1 is provided with a plurality of oil grooves 12, and the oil grooves 12 are communicated with the annular groove 11. The oil grooves 12 are used to store damping oil, and the damping oil flows from the oil grooves 12 into the annular groove 11.

[0028] In this embodiment, if Figure 2As shown, the shell includes a first shell 3 and a second shell 4 cooperatively connected to the first shell 3 , the first inner core 1 rotates with the first shell 3 and is located inside the first shell 3 , and the second inner core 2 is fixedly connected to the second shell 4 .

[0029] In this embodiment, if Figure 2 As shown, the second inner core 2 is provided with a limiting protrusion 23 on one side facing the second shell 4, and the second shell 4 is provided with a limiting groove 41 matched with the limiting protrusion 23. The second shell 4 is relatively fixedly connected to the limiting protrusion 23 to prevent the second inner core 2 from rotating circumferentially with the first inner core 1.

[0030] In this embodiment, if Figure 2 As shown, the first shell 3 is provided with a plurality of locking protrusions 31 along the circumferential direction, and the second shell 4 is provided with a plurality of locking grooves 42 along the circumferential direction to match the locking protrusions 31. The first shell 3 and the second shell 4 are relatively fixedly arranged in the circumferential direction.

[0031] In this embodiment, if Figure 5 As shown, the first shell 3 is provided with a hanging ear 32, and the hanging ear 32 is provided with a screw hole 33 for connecting with the connection cover 6. The first shell 3 is mounted on the connection cover 6 by screws 8. The first shell 3, the second inner core 2, and the second shell 4 are all provided with a through hole 5 through which the motor shaft 7 or the spline shaft 9 passes.

[0032] like Figure 5 and Figure 6 As shown, the utility model also discloses an electric device, including a connection cover 6 and at least one damper as described above, wherein the connection cover is detachably connected to the motor housing or the head housing, and the number of dampers can be increased or decreased as needed to adjust the load size. When there are multiple dampers, the dampers are connected in series on the motor shaft or the spline shaft, such as Figure 7 As shown, the continuity and stability of the load are ensured. The connection cover 6 is provided with multiple layers of screw holes for connecting with the hanging ears on the first shells.

[0033] The above description is only a preferred embodiment of the utility model, and does not limit the patent protection scope of the utility model. Any equivalent structural transformation made using the contents of the utility model specification and drawings, directly or indirectly used in other related technical fields, is also included in the protection scope of the utility model.

Claims

1. A damper, characterized in that: It includes a shell and a core body arranged inside the shell, the core body includes a first inner core and a second inner core, the first inner core is provided with an axial hole for fixed connection with a motor shaft or a spline shaft, the first inner core and the second inner core are arranged to rotate relative to each other to form a damping chamber, and the damping chamber is filled with damping oil.

2. The damper according to claim 1, characterized in that The first inner core is provided with a plurality of annular grooves in sequence from the shaft hole to the edge, and the second inner core is provided with a plurality of annular protrusions, and the plurality of annular protrusions are inserted into the plurality of annular grooves in a one-to-one correspondence.

3. The damper according to claim 2, characterized in that: The annular protrusion is provided with a plurality of grooves spaced apart along the circumferential direction, and the grooves are arranged alternately with the grooves on the adjacent second annular protrusion.

4. The damper according to claim 2, characterized in that: The first inner core is provided with a plurality of oil grooves, and the oil grooves are communicated with the annular grooves.

5. The damper according to claim 1, characterized in that: The shell comprises a first shell and a second shell matched with the first shell, the first inner core rotates with the first shell and is located inside the first shell, and the second inner core is fixedly connected with the second shell.

6. The damper according to claim 5, characterized in that A limiting protrusion is provided on a side of the second inner core facing the second shell, and a limiting groove matched with the limiting protrusion is provided on the second shell.

7. The damper according to claim 5, characterized in that The first shell is provided with a plurality of latching protrusions along the circumferential direction, and the second shell is provided with a plurality of latching grooves matched with the latching protrusions along the circumferential direction.

8. The damper according to claim 5, characterized in that The first shell is provided with a hanging ear, and the hanging ear is provided with a screw hole for connecting with the connection cover.

9. An electric device, characterized in that: It comprises a connection cover and the damper according to any one of claims 1 to 8, wherein the connection cover is used for detachably connecting with a motor housing or a head housing.

10. The electric device according to claim 9, characterized in that: There are multiple dampers, and the multiple dampers are sequentially stacked and installed on the connection cover.

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