Motor stalling test tool

Abstract

The utility model discloses a motor locked-rotor test tool, which comprises a test bench and a locked-rotor frame fixedly connected to the upper end of the test bench, a connecting seat for mounting a test motor is movably arranged above the test bench, a power shaft is fixedly connected to the power end of the test motor, and an open slot is arranged on the outer side of the test bench in a penetrating manner. A sliding groove communicated with the open groove is formed in the upper end of the test bed in a penetrating mode, a sliding block is movably arranged in the open groove, the sliding block slidably penetrates through the sliding groove and then is fixedly connected to the bottom of the connecting base, a fixed clamping base is fixedly arranged at the bottom of an inner cavity of the locked-rotor frame, and a movable clamping base is longitudinally and movably arranged at the top of the inner cavity of the locked-rotor frame. According to the utility model, the motor locked-rotor test is carried out by adopting relatively automatic test steps, the operation is simpler, the power shaft of the motor is more stably limited and fixed, the looseness in the locked-rotor test is avoided, the test measurement result is ensured, and the whole structure is reasonable and attractive in arrangement and high in practicability.

Description

Technical Field

[0001] This utility model relates to the field of motor design, and in particular to a motor stall test fixture. Background Technology

[0002] Motor stall occurs when a motor continues to output torque even at zero revolutions per minute (0 RPM), typically due to mechanical or human error. It can be caused by excessive load, mechanical failure in the driven component, or bearing damage leading to rotor rubbing, preventing the motor from starting or stopping. During a stall, the power factor is extremely low, and the stall current can reach up to seven times the rated current; prolonged stalling can burn out the motor. Therefore, a stall test is a standard part of motor testing.

[0003] To better test the stall torque and losses of this motor, this experiment will provide a better foundation for future motor design and performance improvements. Traditional testing methods are rudimentary; workers use wooden levers to bind and press the motor shaft shut before conducting the stall test. While this manual binding method is simple and convenient, it is unsightly and prone to loosening during the stall test, affecting the measurement results. Utility Model Content

[0004] The purpose of this utility model is to solve the problems existing in the prior art as mentioned in the background art. To achieve the above objective, this utility model adopts the following technical solution:

[0005] A motor stall test fixture includes a test bench and a stall frame fixedly connected to the upper part of the test bench. A connecting seat for mounting the test motor is movably arranged above the test bench. A power shaft is fixedly connected to the power end of the test motor. A slot is provided through the outer side of the test bench, and a sliding groove communicating with the slot is provided through the upper part of the test bench. A slider is movably arranged inside the slot, and after sliding through the sliding groove, the slider is fixedly connected to the bottom of the connecting seat. A fixed bracket is fixedly arranged at the bottom of the inner cavity of the stall frame, and a movable bracket is movably arranged longitudinally at the top of the inner cavity of the stall frame. The mating surfaces of the fixed bracket and the movable bracket are provided with arc-shaped grooves that engage with the outer side of the power shaft. A locking pin is fixedly arranged on the inner wall of the arc-shaped groove at the bottom of the movable bracket, and a locking groove that engages with the locking pin is provided on the surface of the power shaft.

[0006] Preferably, the inner wall of the slot is provided with a threaded shaft that rotates laterally. The threaded shaft passes through the test bench and is fixedly connected to a handle. The threaded shaft is rotatably connected to the test bench through a bearing, and the threaded shaft is threadedly connected to the slider.

[0007] Preferably, the bottom of the slider is uniformly provided with embedding grooves, and a ball bearing is movably embedded in the inner cavity of the embedding groove.

[0008] Preferably, a switch assembly for electrically connecting the test motor is installed on the front of the stall frame.

[0009] Preferably, a guide rod is fixedly connected between the upper end of the fixed bracket and the top of the inner wall of the stall frame, and the guide rod movably passes through both sides of the movable bracket. A threaded rod is threadedly connected to the upper end of the stall frame, and the bottom of the threaded rod is rotatably connected to the upper end of the movable bracket through a bearing.

[0010] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0011] This utility model features a specially designed tooling test bench for motor stall testing. Unlike traditional stall testing methods, it employs a relatively automated testing procedure, making operation simpler and providing more stable limit fixation for the motor drive shaft. This prevents loosening during stall testing, ensuring accurate test results. Furthermore, the overall structure is reasonable, aesthetically pleasing, and highly practical, making it worthy of promotion and use in the current market. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of this utility model;

[0013] Figure 2 This is a side view of the stall frame structure of this utility model.

[0014] In the diagram: 1-Test bench, 2-Stalling frame, 3-Slotted, 301-Threaded shaft, 302-Handle, 4-Slide groove, 5-Slider, 501-Embedded groove, 502-Ball bearing, 6-Connecting seat, 7-Test motor, 8-Power shaft, 9-Slot, 10-Switch assembly, 11-Fixed seat, 12-Modible seat, 1201-Guide rod, 1202-Threaded rod, 13-Pin. Detailed Implementation

[0015] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0016] In the description of this utility model, "multiple" means two or more, unless otherwise explicitly specified.

[0017] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "sleeved / connected," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0019] Reference Figure 1-2 A motor stall test fixture includes a test bench 1 and a stall frame 2 fixedly connected to the upper end of the test bench 1. A connecting seat 6 for mounting a test motor 7 is also movably arranged above the test bench 1. A power shaft 8 is fixedly connected to the power end of the test motor 7. A slot 3 is provided through the outer side of the test bench 1, and a sliding groove 4 communicating with the slot 3 is provided through the upper end of the test bench 1. A slider 5 is movably arranged inside the slot 3, and the slider 5 is fixedly connected to the bottom of the connecting seat 6 after sliding through the sliding groove 4. A fixed card seat 11 is fixedly arranged at the bottom of the inner cavity of the stall frame 2, and a movable card seat 12 is movably arranged longitudinally at the top of the inner cavity of the stall frame 2. The mating surfaces of the fixed card seat 11 and the movable card seat 12 are provided with arc-shaped grooves that engage with the outer side of the power shaft 8. A locking pin 13 is fixedly arranged on the inner wall of the arc-shaped groove at the bottom of the movable card seat 12, and a slot 9 that engages with the locking pin 13 is provided on the surface of the power shaft 8. Among them, the inner wall of the slot 3 is rotatably provided with a threaded shaft 301. The threaded shaft 301 is movably connected to the test bench 1 and is fixedly connected to the handle 302. The threaded shaft 301 is rotatably connected to the test bench 1 through the bearing. The threaded shaft 301 is threadedly connected to the slider 5. The front of the stall frame 2 is equipped with a switch group 10 that is electrically connected to the test motor 7. The upper end of the fixed bracket 11 is fixedly connected to the top of the inner wall of the stall frame 2 with a guide rod 1201. The guide rod 1201 movably passes through both sides of the movable bracket 12. The upper end of the stall frame 2 is threadedly connected to the threaded rod 1202, and the bottom of the threaded rod 1202 is rotatably connected to the upper end of the movable bracket 12 through the bearing.

[0020] Based on the above structure, during use, the operator fixes the test motor 7 to the upper end of the connecting seat 6 using fasteners. Simultaneously, the switch assembly 10 controlling the test motor 7 is suspended outside the stall frame 2 for easy control of the test motor 7. The operator rotates the threaded shaft 301 via the handle 302, causing the threaded slider 5 to slide laterally along the slide groove 4 and adjust the position of the test motor 7 at the upper end of the connecting seat 6. This allows the power shaft 8 of the test motor 7 to engage with the arc-shaped groove at the upper end of the fixed clamp 11. Then, the threaded rod 1202 is rotated, causing the movable clamp 12 to descend along the guide rod 1201. At this time, the locking pin 13 at the bottom of the movable clamp 12 engages with the slot 9 at the upper end of the power shaft 8, thus locking the power shaft 8. This, combined with the threaded structure of the threaded rod 1202, achieves a complete lock, ensuring the stability of locking the power shaft 8 during subsequent motor stall tests. Based on this, the above-mentioned fixture has a reasonable structural design, an aesthetically pleasing layout, and strong stability during testing, effectively guaranteeing the test results.

[0021] It should be added that the bottom of the slider 5 is evenly provided with embedding grooves 501, and the inner cavity of the embedding grooves 501 is movably embedded with balls 502. During the movement of the slider 5, the balls 502 at the bottom move in contact with the inner wall of the groove 3, reducing the overall sliding friction, thereby facilitating the smooth sliding of the slider 5, the connected connecting seat 6, and the test motor 7 at the top.

[0022] The above embodiments are preferred embodiments of the present utility model, but the embodiments of the present utility model are not limited to the above embodiments. Any changes, modifications, substitutions, combinations, or simplifications made without departing from the spirit and principle of the present utility model shall be considered equivalent substitutions and shall be included within the protection scope of the present utility model.

[0023] In the description of this utility model, it should be understood that the terms indicating orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

Claims

1. A motor stall test fixture, comprising a test bench (1) and a stall frame (2) fixedly connected to the upper end of the test bench (1), wherein a connecting seat (6) for mounting a test motor (7) is movably provided above the test bench (1), and a power shaft (8) is fixedly connected to the power end of the test motor (7), characterized in that: The test bench (1) has a slot (3) through it on the outside, and a sliding groove (4) through it on the upper end of the test bench (1) to connect the slot (3). A slider (5) is movably arranged inside the slot (3), and the slider (5) is fixedly connected to the bottom of the connecting seat (6) after sliding through the sliding groove (4). A fixed card seat (11) is fixedly arranged at the bottom of the inner cavity of the stall frame (2), and a movable card seat (12) is movably arranged longitudinally at the top of the inner cavity of the stall frame (2). The mating surfaces of the fixed card seat (11) and the movable card seat (12) are both provided with arc-shaped grooves that are engaged with the outside of the power shaft (8). A locking pin (13) is fixedly arranged on the inner wall of the arc-shaped groove at the bottom of the movable card seat (12), and a slot (9) that is engaged with the locking pin (13) is provided on the surface of the power shaft (8).

2. The motor stall test fixture according to claim 1, characterized in that, The inner wall of the slot (3) is provided with a threaded shaft (301) that rotates laterally. The threaded shaft (301) passes through the test bench (1) and is fixedly connected to a handle (302). The threaded shaft (301) is rotatably connected to the test bench (1) through a bearing. The threaded shaft (301) is threaded through and connected to the slider (5).

3. The motor stall test fixture according to claim 2, characterized in that, The bottom of the slider (5) is uniformly provided with an embedding groove (501), and a ball (502) is movably embedded in the inner cavity of the embedding groove (501).

4. The motor stall test fixture according to claim 3, characterized in that, The front of the stall frame (2) is equipped with a switch group (10) that is electrically connected to the test motor (7).

5. The motor stall test fixture according to claim 4, characterized in that, A guide rod (1201) is fixedly connected between the upper end of the fixed bracket (11) and the top of the inner wall of the stall frame (2), and the guide rod (1201) moves through both sides of the movable bracket (12). A threaded rod (1202) is threadedly connected to the upper end of the stall frame (2), and the bottom of the threaded rod (1202) is rotatably connected to the upper end of the movable bracket (12) through a bearing.

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