Torque device in hollow shaft motor test loading mechanism

Abstract

The utility model discloses a torque device in a hollow shaft motor test loading mechanism, which comprises a support and a lever, the front section of the lever is a supporting arm, the rear end of the lever is a pressing arm, the front end of the supporting arm is provided with a supporting assembly, the rear end of the pressing arm is provided with a pressing assembly, and the supporting assembly can slide forwards or backwards on the lever. The supporting assembly and the pressing assembly are each provided with an elastic piece. And the elastic piece is a pressure spring. The supporting assembly further comprises a first upper seat body and a lower seat body, the lower seat body is pressed on the supporting arm, and the compression spring is located between the first upper seat body and the lower seat body. The lower seat body is provided with a sliding groove with a downward opening, and the sliding groove is arranged on the supporting arm in a sleeved mode and can slide back and forth on the supporting arm. The device has the advantages that acting force is applied to the extension shaft through the lever, the supporting assembly and the downward pressing assembly, and supporting force F0 can be synchronously provided while downward pressing force F1 is applied; the size proportion of the supporting force F0 to the downward pressure F1 can be easily adjusted by sliding the supporting assembly forwards or backwards on the supporting arm.

Description

TECHNICAL FIELD

[0001] The utility model relates to a moment device in hollow shaft motor test loading mechanism belongs to motor test frock technical field. BACKGROUND

[0002] The minimum load of bearing refers to the minimum load that the bearing must bear in order to ensure the normal operation of the bearing and protect the bearing from damage. This minimum load is crucial for the normal operation of the bearing, because it ensures that the rolling elements inside the bearing can obtain the necessary support and lubrication during rotation, so that all rolling elements can roll uniformly, thereby avoiding the formation of long-term unlubricated friction in some local positions of the rolling elements, which can cause wear and tear, and maintaining the performance and service life of the bearing.

[0003] The mechanism by which the bearing is damaged below the minimum load is as follows: due to the inherent frictional resistance between the axially arranged rolling elements and the cage, as well as between the inner and outer rings, when the force applied to the inner ring by the shaft is too small, the force applied to the rolling elements (balls or cylinders) by the inner ring is also small, and the frictional resistance formed between the inner ring and the rolling elements is insufficient to overcome the inherent frictional resistance of the rolling elements, so the rotating inner ring cannot drive the rolling elements to roll together. Therefore, the inner ring and the contacting rolling elements form a high-speed relative frictional motion, significantly increasing the rapid wear of the contact parts of the inner ring and the rolling elements. Further, due to the presence of a set oil film gap between the inner ring and the rolling elements, when the inner ring is in relative friction with one side of the rolling elements, the other side of all the rolling elements does not come into contact with the inner ring, and since the rolling elements subjected to friction do not roll in the grooves of the outer ring, the following situations arise:

[0004] 1. Since the rolling elements subjected to friction do not roll in the grooves of the outer ring, the frictional parts of the rolling elements cannot be lubricated with new lubricating oil, which not only exacerbates the wear of the frictional parts of the rolling elements, but also exacerbates the wear of the inner ring.

[0005] 2. Since the rolling elements subjected to friction do not roll in the grooves of the outer ring, only the fixed parts of the rolling elements subjected to friction are worn out, their circumferences are damaged, and their rolling performance is lost.

[0006] The motor shaft of a hollow shaft motor has front and rear bearings inside the motor. During the idle test at the factory, the motor shaft has no load, and the weight of the rotor is used to achieve the minimum load requirement. However, in recent years, with the promotion of lightweight requirements, the motor shaft has been hollowed out, reducing the weight of the original heavy motor shaft by about half. This causes the load on the front and rear bearings of the motor shaft in the motor to be below the minimum load during the idle test. If this problem is not solved, the above-mentioned damage to the bearings will occur during the idle test. Utility model content

[0007] To solve the above problems, the applicant has invented a hollow shaft motor test loading mechanism (a patent application is filed on the same day), which is characterized in that a extending shaft is fixedly connected to the outer end of the motor shaft, then an upward supporting force F0 is applied to the front end of the extending shaft, a downward pressing force F1 is applied to the rear end of the extending shaft, and the sizes of the supporting force F0 and the pressing force F1 and the ratio between them are adjusted, so that the front end bearing and the rear end bearing of the motor shaft in the motor bear loads exceeding the minimum load.

[0008] The technical problem to be solved by the utility model is how to apply an upward supporting force F0 to the front end of the extending shaft and a downward pressing force F1 to the rear end of the extending shaft and adjust the sizes of the supporting force F0 and the pressing force F1 and the ratio between them.

[0009] In view of the above problems, the technical solution provided by the utility model is characterized in that

[0010] A torque device in a hollow shaft motor test loading mechanism, comprising a support and a lever, the front section of the lever is a supporting arm, the rear end is a pressing arm, a supporting assembly is arranged at the front end of the supporting arm, and a pressing assembly is arranged at the rear end of the pressing arm, the supporting assembly can slide forward or backward on the lever.

[0011] The supporting assembly and the pressing assembly both have elastic members.

[0012] The elastic members are compression springs.

[0013] The supporting assembly further comprises an upper seat body and a lower seat body, the lower seat body is pressed on the supporting arm, and the compression spring is located between the upper seat body and the lower seat body.

[0014] The lower seat body is provided with a downwardly-opened sliding groove, the sliding groove is sleeved on the supporting arm and can slide forward or backward on the supporting arm.

[0015] The pressing assembly further comprises an upper seat body and a lower pulling member, the lower pulling member comprises a downwardly-opened inverted U-shaped pulling frame and a hanging column transversely passing through the rear end of the pressing arm, the pulling frame comprises a top plate, a first pulling plate and a second pulling plate which are vertically suspended and fixed at both ends of the top plate, the lower ends of the first pulling plate and the second pulling plate are respectively provided with hanging holes sleeved on both ends of the hanging column, and the compression spring is arranged between the top plate and the upper seat body.

[0016] The utility model further comprises a loading hanging member and a counterweight, the loading hanging member is hung at the rear end of the pressing arm, and the counterweight is placed on the hanging member.

[0017] The loading hanging member has a hanging rod, the lower end of the hanging rod has a bottom supporting plate, and the counterweight is placed on the bottom supporting plate. Advantageous effects

[0018] 1. The over-lever and support assembly and the down-press assembly apply force to the extension shaft, which can provide support force F0 simultaneously while applying down-press force F1;

[0019] 2. The size ratio of the support force F0 and the down-press force F1 can be easily adjusted by sliding the support assembly forward or backward on the support arm;

[0020] 3. The size ratio of the support force F0 and the down-press force F1 can be easily adjusted by adding or subtracting the counterweight. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 Fig. 1 is a perspective view of the loading mechanism in use;

[0022] Figure 2 Fig. 2 is a perspective view of the extension shaft;

[0023] Figure 3 Fig. 3 is a perspective view of the torque device;

[0024] Figure 4 Fig. 4 is a perspective view of the support assembly;

[0025] Figure 5 Fig. 5 is a perspective view of the down-press assembly;

[0026] Figure 6 Fig. 6 is a perspective view of the loading pendant;

[0027] Figure 7 Fig. 7 is a cross-sectional view of the hollow shaft motor.

[0028] In the figure: 100, motor; 110, rotor; 1, support; 101, horizontal support shaft; 2, lever; 201, support arm; 202, down-press arm; 3, support assembly; 301, upper body one; 3011, arc-shaped slot one; 302, lower body; 3021, sliding groove; 4, down-press assembly; 401, upper body two; 4011, arc-shaped slot two; 402, pull-down frame; 4021, top plate; 4022, pull-down plate one; 4023, pull-down plate two; 4020, hanging hole; 5, loading pendant; 501, hanging rod; 502, bottom support plate; 6, hanging column; 7, compression spring; 8, counterweight; 9, whole shaft; 901, motor shaft; 902, extension shaft; 10, front end bearing; 11, rear end bearing; 12, support bearing; 13, pressure bearing. DETAILED DESCRIPTION

[0029] As Figure 1 , 7As shown, this utility model relates to a test loading mechanism for a hollow shaft motor. The mechanism includes an extension shaft 902 that is fixedly connected to the outer end of the motor shaft 901, so that the motor shaft 901 and the extension shaft 902 become a rigid whole shaft 9. An upward support force F0 and a downward pressure F1 are applied to the front end and rear end of the extension shaft 902, respectively, so that the front bearing 10 and the rear bearing 11 of the motor shaft 901 in the motor 100 are evenly stressed and subjected to sufficient force.

[0030] To ensure that the high-speed rotation of the extension shaft 902 is not affected while applying force to it, a support bearing 12 and a pressure bearing 13 are respectively provided at the front and rear ends of the extension shaft 902 to withstand the upward support force F0 and the downward pressure F1, respectively.

[0031] To ensure that the front bearing 10 and rear bearing 11 of the motor shaft 901 are subjected to uniform force and sufficient force within the motor 100, the hollow shaft motor test loading mechanism needs to provide a device that can apply an upward support force F0 and a downward pressure F1 to the front and rear ends of the extension shaft 902, respectively. Furthermore, the device is required to be able to easily increase or decrease the magnitude of the support force F0 and the downward pressure F1, and to be able to easily adjust the magnitude between the two.

[0032] The present invention will be further described below with reference to the accompanying drawings.

[0033] like Figure 1 , 7 As shown, a torque device in a hollow shaft motor test loading mechanism includes a support 1 and a lever 2. The front section of the lever 2 is a support arm 201, and the rear section is a pressing arm 202. A support component 3 is provided at the front end of the support arm 201, and a pressing component 4 is provided at the rear end of the pressing arm 202. The support component 3 can slide forward or backward on the lever 2. In application, the torque device is located below the extension shaft 902, and the lever 2 is parallel to the extension shaft 902. The support component 3 at the front end of the support arm 201 and the pressing component 4 at the rear end of the pressing arm 202 provide an upward support force F0 and a downward pressure force F1 to the support bearing 12 and the pressure bearing 13, respectively. The ratio of the support force F0 and the downward pressure F1 can be adjusted by sliding the support component 3 forward or backward on the lever 2. The magnitude of the support force F0 and the downward pressure F1 can be adjusted by the magnitude of the force applied to the rear end of the pressing arm 202. In this way, by applying force to the extension shaft 902 through the lever 2, the support component 3, and the pressing component 4, the supporting force F0 can be provided simultaneously while the downward pressure F1 is applied. Moreover, by sliding the support component 3 forward or backward on the support arm 201, the effective length of the support arm 201 is actually changed, which changes the torque ratio of the supporting force F0 multiplied by the effective length of the support arm 201 to the downward pressure F1 multiplied by the length of the pressing arm 202. Thus, the magnitude ratio of the supporting force F0 to the downward pressure F1 can be easily adjusted.

[0034] Here, preferably, a horizontal support shaft 101 is arranged on the support, and the lever 2 is installed on the horizontal support shaft 101 to rotate around the horizontal support shaft 101 as a fulcrum.

[0035] As shown in Figs. Figure 1 , 3 , 4, 5, the support assembly 3 and the pressing assembly 4 are both provided with elastic members. Since it is difficult to accurately set the height of the support 1 in the torque device, if the elastic members are not arranged, only one of the support assembly 3 and the pressing assembly 4 can contact the extension shaft 902, and the other cannot contact the extension shaft 902, so that the force cannot be applied. Therefore, the arrangement of the extension assembly can automatically adjust the force relationship of all related force receiving components including the support assembly 3, the pressing assembly 4, and the front end bearing 10 and the rear end bearing 11.

[0036] Preferably, the elastic member is a compression spring 7 with a long compression stroke and easy to set the compression stroke, but it can also be a rubber body.

[0037] As shown in Figs.

[0038] As shown in Figs. Figure 1 , 5As shown, the downward pressing assembly 4 further comprises an upper seat body two 401 and a downward pulling member. The upper seat body two 401 is pressed on the upper part of the pressure bearing 13. The downward pulling member comprises a downward opening inverted U-shaped downward pulling frame 402 and a hanging column 6 which transversely passes through the rear end of the downward pressing arm 202. The downward pulling frame 402 comprises a top plate 4021, downward pulling plates one 4022 and two 4023 which are vertically fixed on both ends of the top plate 4021. The downward pulling plates one 4022 and two 4023 are respectively provided with hanging holes 4020 at their lower ends. In use, the downward pulling frame 402 straddles the extension shaft 902, the hanging holes 4020 at the lower ends of the downward pulling plates one 4022 and two 4023 are respectively sleeved on both ends of the hanging column 6, the upper seat body two 401 and the pressure bearing are located in the downward pulling frame 402, and the compression spring 7 is compressed between the top plate 4021 and the upper seat body. In this way, the downward pressing arm 202 exerts a downward force on the downward pulling frame 402, and the compression spring 7 and the upper seat body two 401 can exert a downward force on the pressure bearing 13. In order to facilitate stable contact with the pressure bearing 13, the upper seat body two 401 is provided with an arc-shaped slot two 4011 which opens downward and has an arc consistent with the arc of the outer ring of the pressure bearing 13.

[0039] As shown in the drawings, Figure 6 The moment device further comprises a loading hanging member 5 and a counterweight 8. The loading hanging member 5 is hung on the rear end of the downward pressing arm 202, and the counterweight 8 is placed on the hanging member. The counterweight 8 can have multiple pieces and different weights.

[0040] The loading hanging member 5 has a hanging rod 501, and the lower end of the hanging rod has a bottom supporting plate 502. The counterweight 8 is placed on the bottom supporting plate 502.

[0041] The above embodiments are only used to more clearly describe the utility model and cannot be regarded as limiting the protection scope covered by the utility model. Any equivalent modification shall be regarded as falling within the protection scope covered by the utility model.

Claims

1. A torque device in a test loading mechanism for a hollow shaft motor, characterized by: The utility model provides a kind of supporting and pressing device, including support (1) and lever (2), the front section of lever (2) is support arm (201), rear end is press-down arm (202), support assembly (3) is equipped in the front end of support arm (201), press-down assembly (4) is equipped in the rear end of press-down arm (202).The support assembly (3) can slide forward or backward on lever (2).

2. A torque device in a hollow shaft motor test loading mechanism according to claim 1, characterized in that: The support assembly (3) and press-down assembly (4) both have elastic members.

3. A torque device in a hollow shaft motor test loading mechanism according to claim 2, characterized in that: The elastic members are compression springs (7).

4. A torque device in a hollow shaft motor test loading mechanism according to claim 3, characterized in that: The support assembly (3) further includes upper seat one (301) and lower seat (302), the lower seat (302) is pressed on support arm (201), and the compression spring (7) is located between upper seat one (301) and lower seat (302).

5. A torque device in a hollow shaft motor test loading mechanism according to claim 4, characterized in that: The lower seat (302) is provided with a downwardly open chute (3021), which is sleeved on the support arm (201) and can slide forward and backward on the support arm (201).

6. The torque device in a hollow shaft motor test loading mechanism of claim 4 wherein: The press-down assembly (4) further includes upper seat two (401) and a lower puller, the lower puller includes a downwardly open inverted U-shaped lower pull frame (402) and a hanging column (6) transversely passing through the rear end of the press-down arm (202), the lower pull frame (402) includes a top plate (4021), a lower pull plate one (4022) and a lower pull plate two (4023) vertically suspended and fixed at both ends of the top plate (4021), the lower ends of the lower pull plate one (4022) and the lower pull plate two (4023) are respectively provided with hanging holes (4020) sleeved on both ends of the hanging column (6), and the compression spring (7) is arranged between the top plate (4021) and the upper seat two (401).

7. The torque device in a hollow shaft motor test loading mechanism according to any one of claims 1 to 6, characterized in that: It also includes a loading hanging piece (5) and a counterweight (8), the loading hanging piece (5) is hung on the rear end of the press-down arm (202), and the counterweight (8) is placed on the loading hanging piece (5).

8. A torque device in a hollow shaft motor test loading mechanism according to claim 7, characterized in that: The loading hanging piece (5) has a hanging rod (501), and the lower end of the hanging rod has a bottom supporting plate (502), and the counterweight (8) is placed on the bottom supporting plate (502). The loading hanging piece (5) has a hanging rod (501), and the lower end of the hanging rod has a bottom supporting plate (502), and the counterweight (8) is placed on the bottom supporting plate (502).

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