Motor stalling detection tool

Abstract

The utility model belongs to the technical field of motor detection equipment, and relates to a motor stalling detection tool, which comprises a workbench, an electrical cabinet is arranged below the workbench, the electrical cabinet is electrically connected with a junction box of a motor to be detected, a motor fixing device is arranged on one side above the workbench, a motor locking device is arranged on the other side above the workbench, and the motor locking device is electrically connected with the electrical cabinet. The motor fixing device comprises an L-shaped fixing seat, a transverse plate of the fixing seat is used for bearing a motor and can slide relative to the motor locking device, a vertical plate of the fixing seat is fixedly connected with a motor mounting flange and is provided with a through hole for a motor shaft to penetrate out, and the motor locking device comprises a locking seat. A locking block is arranged on the locking seat, a locking hole coaxial with the motor shaft is formed in the locking block, and the locking hole and the motor shaft are locked in the circumferential direction through a matched flat face. The motor stalling detection tool provided by the utility model has the advantages of simple structure and convenient operation.

Description

Technical Field

[0001] This utility model belongs to the technical field of motor testing equipment, and relates to a motor stall detection fixture. Background Technology

[0002] When a motor is running normally, if the rotor fails to rotate or its speed drops sharply to near zero due to mechanical obstruction, excessive load, or other reasons, this state is called a stalled motor. In this stalled state, the motor experiences an abnormally high current and severe winding overheating. If not detected and addressed promptly, this can lead to motor burnout, circuit overload, or even a safety accident. To prevent such accidents, motors are typically equipped with a stall protection device. When the temperature rises to a predetermined level (e.g., above 155°C), the power supply is cut off, stopping the motor from operating.

[0003] Therefore, during the factory testing of motors, it is necessary to ensure that the motor's stall protection device is functioning properly. Chinese invention patent application CN118191597A (publication date: 2024-06-14) discloses a test device and method for motor stall, relating to the field of motor stall testing. It includes an L-shaped test frame, with an adjustable-height placement platform at the top of the horizontal plate of the test frame for placing the motor to be tested. A clamping and limiting mechanism for abutting the motor is provided on the side of the placement platform located at the end of the motor. The placement platform and the clamping and limiting mechanism are connected by a connecting member.

[0004] The aforementioned motor stall test device has a relatively complex structure and is not convenient to operate. Furthermore, it cannot simultaneously detect other data during stall testing. Utility Model Content

[0005] This utility model addresses the shortcomings of existing technologies by providing a motor stall detection fixture, which has the advantages of simple structure and convenient operation, and can also simultaneously detect other data.

[0006] To solve the above-mentioned technical problems, the objective of this utility model is achieved through the following technical solution:

[0007] A motor stall detection fixture includes a workbench with an electrical cabinet located below it. The electrical cabinet is electrically connected to the junction box of the motor to be tested. A motor fixing device is located on one side of the workbench, and a motor locking device is located on the other side. The motor fixing device includes an L-shaped fixing base. The horizontal plate of the fixing base supports the motor and can slide relative to the motor locking device. The vertical plate of the fixing base is fixedly connected to the motor mounting flange and has a through hole through which the motor shaft passes. The motor locking device includes a locking seat with a locking block. The locking block has a locking hole coaxial with the motor shaft, and the locking hole and the motor shaft are circumferentially locked by a mating flat surface.

[0008] In the aforementioned motor stall detection fixture, a slide rail is laid horizontally along the workbench, and a slider is slidably mounted on the slide rail. The bottom of the horizontal plate of the fixed seat is fixedly connected to the slider. Furthermore, the slide rails are laid in pairs. Furthermore, a locking device for locking the slider is provided on the slider.

[0009] In the aforementioned motor stall detection fixture, a pad is provided on the horizontal plate of the fixed base. The pad is in contact with the bottom of the motor and forms a support structure. The motor shaft and the locking holes on the locking block are distributed in the horizontal direction. Furthermore, the pad is detachably connected to the horizontal plate by fasteners.

[0010] In the aforementioned motor stall detection fixture, the locking block and the locking seat are detachably connected. The end of the locking block is provided with an expanded outer ring, and the locking seat is provided with a mounting hole that matches the locking block. The inner side of the outer ring abuts against the outer side of the locking seat, and the outer ring is fastened to the locking seat by fasteners. Preferably, the locking hole is an axially penetrating flat hole structure.

[0011] In the aforementioned motor stall detection fixture, several temperature sensors are embedded in the coil of the motor. The wires of the temperature sensors pass through radial holes on the motor mounting flange and are electrically connected to a handheld terminal. Preferably, multiple temperature sensors are arranged in different positions.

[0012] In the aforementioned motor stall detection fixture, the workbench is provided with wiring holes, the wires of the junction box pass through the wiring holes and are electrically connected to the electrical cabinet, and the junction box contains the speed block to be tested and an indicator light.

[0013] Compared with the prior art, this utility model has the following advantages:

[0014] This invention provides a motor stall detection fixture. By setting a motor fixing device that is fixed to the motor mounting flange and a motor locking device that circumferentially locks to the flat surface of the motor shaft, it achieves motor stall detection, offering advantages such as simple structure and convenient operation. Furthermore, this invention can also detect the temperature rise during motor stall using an embedded temperature sensor, making the detection results more detailed and accurate. Moreover, this invention can also be used to test electrical components such as motor speed reducers and indicator lights. Attached Figure Description

[0015] Figure 1 This is the front view of this utility model;

[0016] Figure 2 This is the front view of the present invention (excluding the electrical cabinet);

[0017] Figure 3 This is a perspective view of the present invention (excluding the electrical cabinet);

[0018] Figure 4 This is a perspective view of the motor fixing device of this utility model;

[0019] Figure 5 This is a perspective view of the motor locking device of this utility model;

[0020] Reference numerals: 1. Workbench; 11. Slide rail; 12. Slider; 2. Lower electrical cabinet; 3. Motor; 31. Junction box; 32. Motor mounting flange; 33. Motor shaft; 34. Radial hole; 4. Motor fixing device; 41. Fixing base; 42. Horizontal plate; 43. Vertical plate; 44. Through hole; 45. Pad; 5. Motor locking device; 51. Locking seat; 52. Locking block; 53. Locking hole; 54. Outer ring. Detailed Implementation

[0021] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. See also: Figure 1-5 :

[0022] A motor stall detection fixture includes a workbench 1, an electrical cabinet 2 located below the workbench 1, the electrical cabinet 2 being electrically connected to the junction box 31 of the motor 3 to be tested, a motor fixing device 4 located on one side of the workbench 1 and a motor locking device 5 located on the other side, the motor fixing device 4 including an L-shaped fixing base 41, the horizontal plate 42 of the fixing base 41 being used to support the motor 3 and being slidable relative to the motor locking device 5, the vertical plate 43 of the fixing base 41 being fixedly connected to the motor mounting flange 32 and having a through hole 44 through which the motor shaft 33 passes, the motor locking device 5 including a locking seat 51, a locking block 52 located on the locking seat 51, the locking block 52 having a locking hole 53 coaxial with the motor shaft 33, the locking hole 53 being circumferentially locked to the motor shaft 33 by a mating flat surface.

[0023] During testing, the motor mounting flange 32 of the motor 3 is fixedly connected to the fixed seat 41. Then, the fixed seat 41 carrying the motor 3 is slid towards the motor locking device 5, so that the motor shaft 33 is inserted into the locking hole 53 of the locking block 52 to form a circumferential locking structure. The motor 3 is started, and the stall protection device of the motor 3 is tested to see if it is working properly. After the test is completed, the fixed seat 41 is slid away from the motor locking device 5, so that the motor shaft 33 is disengaged from the locking hole 53. Then, the motor 3 is removed from the fixed seat 41.

[0024] The sliding structure of this embodiment is as follows: a slide rail 11 is laid horizontally on the worktable 1, and a slider 12 is slidably disposed on the slide rail 11. The bottom of the horizontal plate 42 of the fixed seat 41 is fixedly connected to the slider 12. Furthermore, the slide rail 11 is laid in pairs. Furthermore, a locking device is provided on the slider 12 to lock the slider 12. When the fixed seat 41 slides to a predetermined position, the locking device locks the slider 12, so that the fixed seat 41 and the worktable 1 remain relatively stationary, and then the detection begins.

[0025] A pad 45 is provided on the transverse plate 42 of the aforementioned fixed base 41. The pad 45 is in contact with the bottom of the motor 3 and forms a support structure. By providing the pad 45, the motor shaft 33 of the motor 3 is distributed in the horizontal direction, and the locking holes 53 on the locking block 52 are also distributed in the horizontal direction. Furthermore, the pad 45 is detachably connected to the transverse plate 42 by fasteners. By replacing different pads 45, motors 3 of different specifications can be adapted.

[0026] The locking block 52 and the locking seat 51 are detachably connected. The end of the locking block 52 is provided with an expanded outer ring 54. The locking seat 51 is provided with a mounting hole that matches the locking block 52. The inner side of the outer ring 54 abuts against the outer side of the locking seat 51. The outer ring 54 is fastened to the locking seat 51 by fasteners. Preferably, the locking hole 53 is a flat hole structure that penetrates axially. By replacing the locking block 52, motors 3 of different specifications can be adapted.

[0027] Furthermore, several temperature sensors are embedded in the coil of the motor 3. The wires of the temperature sensors pass through the radial holes 34 on the motor mounting flange 32 and are electrically connected to the handheld terminal. Preferably, multiple temperature sensors are set in different positions. The temperature sensors can detect the temperature rise of the motor 3 when it is stalled.

[0028] The workbench 1 is provided with a wiring hole. The wires of the junction box 31 pass through the wiring hole and are electrically connected to the electrical cabinet 2. The junction box 31 is provided with a speed block and an indicator light to be tested. After the equipment is started, it can be observed or tested whether the speed block and the indicator light are working properly.

[0029] The above embodiments are merely preferred embodiments of the present utility model and are not intended to limit the scope of protection of the present utility model. Therefore, all equivalent changes made to the structure, shape, and principle of the present utility model should be covered within the scope of protection of the present utility model.

Claims

1. A motor stall detection fixture, comprising a worktable (1), characterized in that, An electrical cabinet (2) is provided below the workbench (1). The electrical cabinet (2) is electrically connected to the junction box (31) of the motor (3) to be tested. A motor fixing device (4) is provided on one side of the workbench (1), and a motor locking device (5) is provided on the other side. The motor fixing device (4) includes an L-shaped fixing base (41). The horizontal plate (42) of the fixing base (41) is used to support the motor (3) and can slide relative to the motor locking device (5). The vertical plate (43) of the fixed base (41) is fixedly connected to the motor mounting flange (32) and is provided with a through hole (44) through which the motor shaft (33) passes. The motor locking device (5) includes a locking seat (51), and a locking block (52) is provided on the locking seat (51). The locking block (52) is provided with a locking hole (53) coaxial with the motor shaft (33). The locking hole (53) and the motor shaft (33) are locked circumferentially by a matching flat surface.

2. The motor stall detection fixture according to claim 1, characterized in that, The workbench (1) is provided with a slide rail (11) laid horizontally, and a slider (12) is slidably arranged on the slide rail (11). The bottom of the horizontal plate (42) of the fixed seat (41) is fixedly connected to the slider (12).

3. The motor stall detection fixture according to claim 1, characterized in that, A pad (45) is provided on the horizontal plate (42) of the fixed base (41). The pad (45) is in contact with the bottom of the motor (3) and forms a support structure. The motor shaft (33) of the motor (3) and the locking holes (53) on the locking block (52) are distributed in the horizontal direction.

4. The motor stall detection fixture according to claim 1, characterized in that, The locking block (52) is detachably connected to the locking seat (51). The end of the locking block (52) is provided with an expanded outer ring (54). The locking seat (51) is provided with a mounting hole that matches the locking block (52). The inner side of the outer ring (54) abuts against the outer side of the locking seat (51). The outer ring (54) is fastened to the locking seat (51) by fasteners.

5. The motor stall detection fixture according to claim 1, characterized in that, Several temperature sensors are embedded in the coil of the motor (3). The wires of the temperature sensors pass through the radial holes (34) on the motor mounting flange (32) and are electrically connected to the handheld terminal.

6. The motor stall detection fixture according to claim 1, characterized in that, The workbench (1) is provided with a wiring hole. The wires of the junction box (31) pass through the wiring hole and are electrically connected to the electrical cabinet (2). The junction box (31) is provided with a speed block to be tested and an indicator light.

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