A rotor suspension motor test tool

Abstract

The utility model provides a kind of rotor cantilever motor test tool, belong to mechanical technical field.It solves the problem of complex existing tool structure.The utility model, cantilever motor includes shell and the rotor shaft of horizontal setting in shell, and rotor shaft is hollow, test tool includes connecting shaft, connecting shaft rear end inserts rotor shaft front end, and connecting shaft and rotor shaft are locked together by flat key cooperation and through first bolt can be dismantled;Connecting shaft is equipped with two cylindrical connecting seats, two connecting seats are fixed together, and connecting seat in rear side is detachably fixed with shell by second bolt;Two connecting seats are rotatably matched with connecting shaft by one rolling bearing, and annular limit seat is formed on the outer wall of connecting shaft, and rolling bearing includes inner ring and outer ring, and the end face of two inner rings adjacent is respectively pressed on the end face of limit seat, and the end face of two outer rings away is respectively pressed on the inner wall of two connecting seats.The rotor cantilever motor test tool structure is simple.

Description

Technical Field

[0001] This utility model belongs to the field of mechanical technology and relates to a rotor cantilever motor, and more particularly to a rotor cantilever motor testing fixture. Background Technology

[0002] When using existing cantilever motors, the stator is fixed to the load end, and the rotor is directly rigidly connected to the load's rotating shaft end, resulting in the motor rotor being in a cantilever state. When testing this type of motor under simulated load conditions, a tooling that meets the requirements of the cantilever structure is needed to test the motor's performance.

[0003] Existing tooling structures for testing cantilever motors include a split-type motor performance testing tooling structure disclosed in the Chinese Patent Database (application number: 202120870141.4), comprising an integral mounting plate, a support plate, a connecting shaft, and a rotor mounting shaft. Both the integral mounting plate and the support plate have central holes. The connecting shaft is a hollow shaft, with both ends connected to the central holes of the integral mounting plate and the support plate, respectively. The rotor mounting shaft is rotatably mounted within the connecting shaft, with both ends extending beyond the connecting shaft. The rotor mounting shaft is mounted within the connecting shaft via bearings, which are interference-fitted with the connecting shaft. Two bearings are used.

[0004] As can be seen from the above tooling diagram, the axial positioning of the bearing requires the assistance of other additional components, which complicates the overall structure of the tooling and affects assembly. Utility Model Content

[0005] The purpose of this invention is to address the aforementioned problems in existing technologies by proposing a simple rotor cantilever motor testing fixture.

[0006] The objective of this utility model can be achieved through the following technical solution: A test fixture for a cantilever motor, the cantilever motor including a housing and a rotor shaft horizontally disposed within the housing, the rotor shaft being hollow; the test fixture including a connecting shaft coaxial with the rotor shaft, characterized in that the rear end of the connecting shaft is inserted into the front end of the rotor shaft, the connecting shaft and the rotor shaft are detachably locked together by a flat key and a first bolt; the connecting shaft is fitted with two cylindrical connecting seats, the two connecting seats are distributed along the axial direction of the connecting shaft and are fixed together, the connecting seat on the rear side is detachably fixed to the housing by a second bolt; both connecting seats are rotatably engaged with the connecting shaft by a rolling bearing, the outer wall of the connecting shaft is formed with an annular limiting seat coaxial with the connecting shaft, the rolling bearing including an inner ring fixed to the connecting shaft and an outer ring fixed to the inner wall of the corresponding connecting seat, the adjacent end faces of the two inner rings respectively abutting the two end faces of the limiting seat, and the far end faces of the two outer rings respectively abutting the inner walls of the two connecting seats.

[0007] In use, the connecting seat is fixed, and the front end of the connecting shaft is connected to the main shaft of the dynamometer via a coupling.

[0008] Two connecting seats are axially distributed on the connecting shaft. After the two connecting seats are fixed together, the bearing is directly clamped between the connecting seat and the limiting seat. This eliminates the need for additional parts to axially limit the bearing, and has the advantages of simple structure and convenient assembly.

[0009] In the aforementioned rotor cantilever motor test fixture, a central hole is formed between the two connecting seats for the connecting shaft to pass through. The two aforementioned rolling bearings are respectively located at both ends of the central hole, and the diameter of the central hole is larger than the diameters at both ends. This design reduces the material input for the connecting seats, lowers costs, and also facilitates bearing heat dissipation.

[0010] In the aforementioned rotor cantilever motor test fixture, there is a gap between the adjacent end faces of the two connecting seats that is aligned with the center hole, and the center hole is connected to the outside of the connecting seat through this gap to further accelerate bearing heat dissipation.

[0011] In the above-mentioned rotor cantilever motor test fixture, a ring of protrusions is formed on the outer wall of both connecting seats, evenly distributed around the circumference of the connecting seats. The two protrusions corresponding to each other are pressed together and can be detachably fixed by a horizontally set third bolt. It has the advantages of simple structure and convenient installation.

[0012] In the aforementioned rotor cantilever motor test fixture, the axis of the first bolt extends axially along the connecting shaft. A threaded hole, mates with the first bolt, is axially formed on the rear end face of the connecting shaft. The shank of the first bolt is screwed into the threaded hole, and the head of the first bolt is pressed against the rear end face of the rotor shaft. The direction in which the rotor shaft is fitted onto the connecting shaft is consistent with the installation direction of the first bolt, further facilitating assembly.

[0013] In the aforementioned rotor cantilever motor test fixture, a guide ring matching the front port of the housing is formed on the rear end face of the connecting seat located at the rear. The guide ring is inserted into the front port of the housing and is used for guiding the assembly of the connecting seat and the housing, facilitating assembly.

[0014] In the aforementioned rotor cantilever motor test fixture, the inner walls of both connecting seats are formed with annular steps that match the rolling bearings, and the two rolling bearings are respectively pressed into the two annular steps; the outer ring on the rear side directly presses against the bottom surface of the corresponding annular step, and the outer ring on the front side presses against the bottom surface of the corresponding annular step through a wave-shaped spring pad, so as to reduce the influence of cantilever sway caused by rolling bearing clearance and improve test accuracy.

[0015] Compared with existing technologies, this rotor cantilever motor testing fixture has the following advantages: 1. Two connecting seats are axially distributed on the connecting shaft. After the two connecting seats are fixed together, the bearing is directly clamped between the connecting seat and the limiting seat. This eliminates the need for additional parts to axially limit the bearing, and has the advantages of simple structure and convenient assembly.

[0016] 2. The direction in which the rotor shaft is inserted into the connecting shaft is consistent with the installation direction of the first bolt, which can further facilitate assembly. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the test fixture.

[0018] Figure 2 This is a schematic diagram showing the connection between the test fixture and the rotor cantilever motor.

[0019] In the diagram, 1. Housing; 2. Rotor shaft; 3. Connecting shaft; 3a. Limiting seat; 3b. Threaded hole one; 4. First bolt; 5. Key block; 6. Connecting seat; 6a. Annular step; 6b. Guide ring; 6c. Protrusion; 7. Center hole; 8. Second bolt; 9. Rolling bearing; 9a. Inner ring; 9b. Outer ring; 10. Wave-shaped spring washer; 11. Clearance; 12. Third bolt. Detailed Implementation

[0020] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0021] like Figure 2 As shown, in the test fixture for a cantilever motor, the cantilever motor includes a housing 1 and a rotor shaft 2 horizontally disposed inside the housing 1. The rotor shaft 2 is hollow and open at both ends.

[0022] like Figure 1 and Figure 2 As shown, this test fixture includes a connecting shaft 3 located on the front side of the rotor shaft 2, and the connecting shaft 3 is coaxially arranged with the rotor shaft 2. The rear end of the connecting shaft 3 is inserted into the front end of the rotor shaft 2. The connecting shaft 3 and the rotor shaft 2 are detachably locked together by a flat key and a first bolt 4. Specifically, a key block 5 is fixed on the outer wall of the connecting shaft 3, and the length of the key block 5 extends along the axial direction of the connecting shaft 3. A keyway matching the key block 5 is opened on the inner wall of the rotor shaft 2. The length of the keyway extends along the axial direction of the rotor shaft 2. The front end and the rear end of the keyway are open and closed, respectively, and the key block 5 is inserted into the keyway.

[0023] like Figure 1As shown, the connecting shaft 3 is fitted with two cylindrical connecting seats 6, which are distributed along the axial direction of the connecting shaft 3 and fixed together. A central hole 7 is formed between the two connecting seats 6 for the connecting shaft 3 to pass through. The rear connecting seat 6 is detachably fixed to the housing 1 by a second bolt 8. Both connecting seats 6 are rotatably fitted to the connecting shaft 3 by a rolling bearing 9. The rolling bearing 9 is an existing product and can be a double-row deep groove ball bearing, tapered roller bearing, etc. The rolling bearing 9 includes an inner ring 9a fixed to the connecting shaft 3 and an outer ring 9b fixed to the inner wall of the corresponding connecting seat 6. In the actual product, the inner ring 9a and the outer ring 9b are fixed to the connecting shaft 3 and the corresponding connecting seat 6 respectively by an interference fit. A ring-shaped limiting seat 3a is formed on the outer wall of the connecting shaft 3 and is coaxial with the connecting shaft 3. The limiting seat 3a is located between the two rolling bearings 9. The adjacent end faces of the two inner rings 9a press against the two end faces of the limiting seat 3a, and the far end faces of the two outer rings 9b press against the inner walls of the two connecting seats 6, so as to stabilize the rolling bearing 9 in the axial direction and ensure the stable rotation of the connecting shaft 3.

[0024] In use, the connecting seat 6 is fixedly set, and the front end of the connecting shaft 3 is connected to the main shaft of the dynamometer through a coupling.

[0025] Two connecting seats 6 are axially distributed on the connecting shaft 3. After the two connecting seats 6 are fixed together, the bearing is directly clamped between the connecting seat 6 and the limiting seat 3a. This eliminates the need for additional parts to axially limit the bearing, and has the advantages of simple structure and convenient assembly.

[0026] To further explain, both connecting seats 6 have annular steps 6a formed on their inner walls to match the rolling bearings 9, and the annular steps 6a are coaxial with the connecting shaft 3. The two rolling bearings 9 are respectively press-fitted into the two annular steps 6a. The outer ring 9b on the rear side directly presses against the bottom surface of the corresponding annular step 6a, while the outer ring 9b on the front side presses against the bottom surface of the corresponding annular step 6a through a wave-shaped spring pad 10. At this time, the wave-shaped spring pad 10 is sleeved on the connecting shaft 3, and the two end faces of the wave-shaped spring pad 10 press against the bottom surface of the corresponding annular step 6a and the end face of the corresponding outer ring 9b, respectively, to reduce the influence of cantilever sway caused by the clearance of the rolling bearings 9 and improve the test accuracy.

[0027] Furthermore, two annular steps 6a are formed at both ends of the central hole 7. At this point, two rolling bearings 9 are respectively positioned at both ends of the central hole 7, and the diameter of the central hole 7 is larger than the diameters at both ends. This design reduces the material input for the connecting seat 6, lowering costs, and also facilitates bearing heat dissipation. A gap 11 is provided between the adjacent end faces of the two connecting seats 6, directly opposite the central hole 7, and the central hole 7 connects to the outside of the connecting seat 6 through this gap 11, further accelerating bearing heat dissipation.

[0028] In this embodiment, The installation method of the second bolt 8 is as follows: the front end face of the housing 1 presses against the rear end face of the connecting seat 6 located at the rear; the front end face of the housing 1 is provided with a through hole extending along the axial direction of the housing 1, at least two through holes are provided and are evenly distributed around the circumference of the housing 1. The connecting seat 6 located at the rear is provided with a corresponding threaded hole two that matches the second bolt 8. The number of threaded holes two, through holes and the second bolt 8 are the same and their positions correspond one-to-one. The shank of the second bolt 8 passes through the through hole and is screwed into the corresponding threaded hole two. The head of the second bolt 8 is pressed against the inner wall of the housing 1 to stably connect the housing 1 and the corresponding connecting seat 6 together. Further, the rear end face of the connecting seat 6 located at the rear is formed with a guide ring 6b that matches the front port of the housing 1, and the guide ring 6b is inserted into the front port of the housing 1 for guiding the assembly of the connecting seat 6 and the housing 1, facilitating assembly.

[0029] The two connecting seats 6 are fixed as follows: A ring of evenly spaced protrusions 6c is formed on the outer wall of each connecting seat 6. Two corresponding protrusions 6c are pressed together and detachably fixed by a horizontally positioned third bolt 12. This design offers advantages such as simple structure and convenient installation. Specifically, one ring of protrusions 6c has an axially penetrating mounting hole, and the other ring of protrusions 6c has a corresponding threaded hole. The aforementioned third bolt 12 passes through the mounting hole, and the shank of the third bolt 12 is screwed into the corresponding threaded hole, with the head of the third bolt 12 pressing against the corresponding protrusion 6c.

[0030] like Figure 1 and Figure 2 As shown, the installation method of the first bolt 4 is as follows: the axis of the first bolt 4 extends along the axial direction of the connecting shaft 3, and a threaded hole 3b that mates with the first bolt 4 is axially opened on the rear end face of the connecting shaft 3. The shank of the first bolt 4 is screwed into the threaded hole 3b, and the head of the first bolt 4 is pressed against the rear end face of the rotor shaft 2. The direction in which the rotor shaft 2 is fitted into the connecting shaft 3 is consistent with the installation direction of the first bolt 4, which further facilitates assembly.

[0031] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

Claims

1. A test fixture for a cantilever motor, the cantilever motor comprising a housing (1) and a rotor shaft (2) horizontally disposed within the housing (1), wherein the rotor shaft (2) is hollow, and the test fixture comprising a connecting shaft (3) coaxial with the rotor shaft (2), characterized in that, The rear end of the connecting shaft (3) is inserted into the front end of the rotor shaft (2). The connecting shaft (3) and the rotor shaft (2) are connected together by a flat key and detachably locked together by a first bolt (4). The connecting shaft (3) is fitted with two cylindrical connecting seats (6). The two connecting seats (6) are distributed along the axial direction of the connecting shaft (3) and are fixed together. The connecting seat (6) on the rear side is detachably fixed to the housing (1) by a second bolt (8). Both connecting seats (6) are connected by a rolling bearing. 9) Rotatably engages with the connecting shaft (3). The outer wall of the connecting shaft (3) is formed with a ring-shaped limiting seat (3a) that is coaxial with the connecting shaft (3). The rolling bearing (9) includes an inner ring (9a) fixedly connected to the connecting shaft (3) and an outer ring (9b) fixedly connected to the inner wall of the corresponding connecting seat (6). The adjacent end faces of the two inner rings (9a) press against the two end faces of the limiting seat (3a), and the far end faces of the two outer rings (9b) press against the inner walls of the two connecting seats (6).

2. The rotor cantilever motor testing fixture according to claim 1, characterized in that, A central hole (7) is formed between the two connecting seats (6) for the connecting shaft (3) to pass through. The two aforementioned rolling bearings (9) are respectively set at both ends of the central hole (7), and the diameter of the central hole (7) in the middle is larger than the diameter of the central hole (7) at both ends.

3. The rotor cantilever motor testing fixture according to claim 2, characterized in that, There is a gap (11) between the adjacent end faces of the two connecting seats (6) that is directly opposite the center hole (7), and the center hole (7) is connected to the outside of the connecting seat (6) through the gap (11).

4. The rotor cantilever motor testing fixture according to claim 2 or 3, characterized in that, Both connecting seats (6) have a ring of protrusions (6c) evenly distributed around the circumference of the connecting seat (6). The two protrusions (6c) that are in corresponding positions are pressed together and can be detachably fixed by a third bolt (12) set horizontally.

5. The rotor cantilever motor testing fixture according to claim 1, characterized in that, The axis of the first bolt (4) extends along the axial direction of the connecting shaft (3). A threaded hole (3b) that mates with the first bolt (4) is provided on the rear end face of the connecting shaft (3). The shank of the first bolt (4) is screwed into the threaded hole (3b), and the head of the first bolt (4) is pressed against the rear end face of the rotor shaft (2).

6. The rotor cantilever motor testing fixture according to claim 1, characterized in that, The rear end face of the connecting seat (6) located at the rear side is formed with a guide ring (6b) that matches the front port of the housing (1), and the guide ring (6b) is inserted into the front port of the housing (1).

7. The rotor cantilever motor testing fixture according to claim 1, characterized in that, Both connecting seats (6) have annular steps (6a) formed on their inner walls to match the rolling bearings (9), and the two rolling bearings (9) are respectively pressed into the two annular steps (6a); the outer ring (9b) on the rear side directly presses against the bottom surface of the corresponding annular step (6a), and the outer ring (9b) on the front side presses against the bottom surface of the corresponding annular step (6a) through the wave spring pad (10).

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