Three-phase line detection device based on electric vehicle driving motor rotating speed research

Abstract

The utility model relates to the technical field of three-phase line resistance detection, in particular to a three-phase line detection device based on electric vehicle driving motor rotating speed research. According to the technical scheme, the three-phase line detection device based on the research on the rotating speed of the driving motor of the electric vehicle comprises an installation shell, a first detection piece, a second detection piece, a third detection piece, a fourth detection piece, a stand column, a rotary knob, a contact block, a fifth detection piece, a sixth detection piece, a seventh detection piece and the like, a sensor is connected to the rear side in the mounting shell, a fifth detection piece is connected to the left side in the mounting shell, and a first detection piece is connected to the bottom of the fifth detection piece. The lifting of the upright post and the contact block is controlled through remote operation, and the horizontal rotation adjustment of the contact block is driven by rotating the knob, so that the system can realize the connection of various resistors aiming at the resistors among different three-phase lines, not only can quickly detect various results, but also does not need to directly contact the three-phase lines manually, and the detection efficiency is improved. And the use safety is greatly improved.

Description

Technical Field

[0001] The utility model relates to the technical field of three-phase line resistance detection, in particular to a three-phase line detection device based on the research on the rotation speed of a driving motor of an electric vehicle. Background Art

[0002] The electric vehicle (EV) drive motor is one of the core components of the electric vehicle power system, which converts electrical energy into mechanical energy to drive the vehicle forward. In the electric vehicle system, the three-phase motor is one of the key components, which works through three-phase alternating current and is responsible for converting electrical energy into mechanical energy to drive the vehicle. In order to ensure that the motor works efficiently and stably, it is very important to monitor its operating parameters (such as speed).

[0003] Traditional three-phase line detection devices often require manual contact with the detection head to detect the resistance of the three-phase line. This method has the following disadvantages:

[0004] 1. Manual operation may cause electric shock to the operator, especially in complex or high-voltage environments. Wrong connection sequence or improper contact method may cause danger;

[0005] 2. Manual operation requires more time to prepare, locate and perform the test, which affects the operation efficiency. In addition, the operation method of each test may not be completely consistent, resulting in reduced consistency and reliability of the test results.

[0006] Therefore, developing a three-phase line detection device based on the research of electric vehicle drive motor speed has important practical application value. Utility Model Content

[0007] In order to overcome the shortcomings of the traditional manual method of three-phase line resistance detection, such as low safety and low detection efficiency, the technical problem to be solved is: providing a three-phase line detection device based on the research of electric vehicle drive motor speed.

[0008] The technical scheme is: a three-phase line detection device based on the research on the speed of an electric vehicle drive motor, comprising a mounting shell, a sensor, a first detection piece, a second detection piece, a third detection piece, a fourth detection piece, a column, a knob, a contact block, a fifth detection piece, a sixth detection piece, a seventh detection piece, an eighth detection piece, a connecting assembly and a lifting assembly. The mounting shell is mounted on the motor housing, the rear side of the mounting shell is connected with a sensor, the left side of the mounting shell is connected with a fifth detection piece, the bottom of the fifth detection piece is connected with a first detection piece, the right side of the mounting shell is connected with a seventh detection piece, the bottom of the seventh detection piece is connected with a third detection piece, the rear side of the mounting shell is connected with an eighth detection piece, the bottom of the eighth detection piece is connected with a second detection piece, the rear side of the mounting shell is connected with a sixth detection piece, the sixth detection piece is located to the left of the eighth detection piece, the front side of the mounting shell is connected with a fourth detection piece, the middle part of the mounting shell is slidably and rotatably connected with a column, the top of the column is connected with a knob, both sides of the lower part of the column are connected with contact blocks, initially the two contact blocks are in contact with the fourth detection piece and the first detection piece respectively, and a lifting assembly and a connecting assembly are provided on the mounting shell.

[0009] Furthermore, the connecting assembly includes a connecting tube, a connecting plate, a push block and a conductive plate. The connecting tube is symmetrically connected to the front and rear of the right side of the mounting shell, the inner side of the connecting tube is connected to the connecting plates, the push block is slidingly connected to the right side of the top of the mounting shell, and the conductive plates are connected to the front and rear sides of the bottom of the push block. The two conductive plates are in contact and cooperate with the corresponding connecting plates, and the two conductive plates are respectively connected to the contact blocks through wires.

[0010] Furthermore, the lifting assembly includes an electric push rod and a clamping ring. The electric push rod is installed on the front side of the mounting shell. The electric push rod is electrically connected to the sensor. The electric push rod telescopic rod is connected to the clamping ring, which is rotatably connected to the column.

[0011] Furthermore, it also includes a marking ring, and the top of the mounting shell is connected with a marking ring for indicating the direction.

[0012] Furthermore, it also includes a cable tie ring and a power connector. The cable tie ring is connected to the upper side of the interior of the installation shell. The cable connecting the conductive sheet and the contact block passes through the cable tie ring. The power connector is fixedly connected to the rear side of the installation shell.

[0013] Furthermore, an adapter is included, and the left side inside the installation shell is connected with the adapter for cable connection.

[0014] The utility model has the following advantages: 1. By remotely controlling the lifting and lowering of the column and the contact block, and by turning the knob to drive the horizontal rotation adjustment of the contact block, the utility model can realize multiple resistance connections for different resistances between three-phase lines, which can not only quickly detect multiple results, but also does not require manual direct contact with the three-phase line, greatly improving the safety of use;

[0015] 2. A sliding mechanism for the conductive sheet and the insulating sheet is designed, which can realize the power on and off function between the connecting sheet and the connecting sheet when the contact block is adjusted. When the contact block is in the adjusted position, the interface is closed, ensuring safety during operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a three-dimensional structural schematic diagram of the utility model.

[0017] Figure 2 It is a three-dimensional structural schematic diagram of components such as the installation shell, three-phase wires and the first detection piece of the utility model.

[0018] Figure 3 It is a three-dimensional structural schematic diagram of the components such as the column, the knob and the electric push rod of the utility model.

[0019] Figure 4 It is a three-dimensional structural schematic diagram of the components such as the column, the knob and the push block of the utility model.

[0020] Figure 5 It is a three-dimensional structural schematic diagram of the push block, conductive sheet, connecting tube and other components of the utility model.

[0021] Figure 6 It is a three-dimensional structural diagram of the utility model including the installation shell, the eighth detection piece and the contact block.

[0022] Figure 7 It is a three-dimensional structural schematic diagram of the utility model including the installation shell, the column and the eighth detection piece.

[0023] Figure 8 It is a three-dimensional structural diagram of the utility model including the installation shell, sensor, power connector and other components.

[0024] Wherein: 1-mounting shell, 2-sensor, 3-adapter, 4-first detection piece, 5-second detection piece, 6-third detection piece, 7-fourth detection piece, 8-three-phase line, 9-column, 10-knob, 11-identification ring, 12-electric push rod, 121-clamp ring, 13-wire ring, 14-contact block, 15-power connector, 16-connecting tube, 17-connecting piece, 19-push block, 20-conductive piece, 21-fifth detection piece, 22-sixth detection piece, 23-seventh detection piece, 25-eighth detection piece. DETAILED DESCRIPTION

[0025] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments, but is not intended to limit the present invention.

[0026] Embodiment: A three-phase line detection device based on the research of electric vehicle drive motor speed, such as Figure 1-Figure 8As shown, it includes a mounting shell 1, a sensor 2, an adapter 3, a first detection piece 4, a second detection piece 5, a third detection piece 6, a fourth detection piece 7, a column 9, a knob 10, an identification ring 11, a contact block 14, a fifth detection piece 21, a sixth detection piece 22, a seventh detection piece 23, an eighth detection piece 25, a connecting component and a lifting component. The mounting shell 1 is installed on the motor housing, the rear side of the mounting shell 1 is connected to the sensor 2, the left side of the mounting shell 1 is connected to the adapter 3 for cable connection, the top of the mounting shell 1 is connected to the identification ring 11 for indicating the direction, the left side of the mounting shell 1 is connected to the fifth detection piece 21, and the bottom of the fifth detection piece 21 is connected to the fifth detection piece 21. A first detection piece 4 is connected, a seventh detection piece 23 is connected to the right side of the mounting shell 1, a third detection piece 6 is connected to the bottom of the seventh detection piece 23, an eighth detection piece 25 is connected to the rear side of the mounting shell 1, a second detection piece 5 is connected to the bottom of the eighth detection piece 25, a sixth detection piece 22 is connected to the rear side of the mounting shell 1, a fourth detection piece 7 is connected to the front side of the mounting shell 1, a column 9 is slidably and rotatably connected to the middle of the mounting shell 1, a knob 10 is welded on the top of the column 9, contact blocks 14 are connected to both sides of the lower part of the column 9, and initially the two contact blocks 14 are in contact with the fourth detection piece 7 and the first detection piece 4 respectively, and a lifting component and a connecting component are provided on the mounting shell 1.

[0027] like Figure 1 , Figure 4 and Figure 5 As shown, the connection assembly includes a connection cylinder 16, a connection piece 17, a push block 19 and a conductive piece 20. The right side of the installation shell 1 is symmetrically connected to the connection cylinder 16 for connecting the positive and negative cables. The inner side of the connection cylinder 16 is connected to the connection piece 17. The top right side of the installation shell 1 is slidably connected to the push block 19. The bottom front and rear sides of the push block 19 are connected to the conductive piece 20. The two conductive pieces 20 are in contact with the corresponding connection pieces 17, and the two conductive pieces 20 are respectively connected to the contact block 14 through wires.

[0028] like Figure 3 and Figure 8 As shown, the lifting assembly includes an electric push rod 12 and a retaining ring 121. The electric push rod 12 for controlling the lifting of the contact block 14 is installed on one side of the mounting shell 1 close to the column 9 through bolts. The electric push rod 12 is electrically connected to the sensor 2. The retaining ring 121 is connected to the telescopic rod of the electric push rod 12, and the retaining ring 121 is rotatably connected to the column 9.

[0029] like Figure 8 As shown, it also includes a cable tie ring 13 and a power connector 15. The cable tie ring 13 is fixedly connected to the upper side of the interior of the mounting shell 1. The cable connected between the conductive sheet 20 and the contact block 14 passes through the cable tie ring 13. The power connector 15 is fixedly connected to the rear side of the mounting shell 1.

[0030] When performing resistance detection on the three-phase line 8 of the motor, it is first necessary to fix the mounting shell 1 on the motor housing so that it is located above the three-phase line 8. The two ends of the fourth detection piece 7 should contact the inner wall of the motor housing, while the first detection piece 4, the second detection piece 5, and the third detection piece 6 in the lower position are in contact with the three-phase line 8 respectively.

[0031] In the initial state, the two contact blocks 14 are aligned with and in contact with the fourth detection piece 7 and the first detection piece 4, respectively. At this time, the positive and negative lines of the resistance detection meter are plugged into the connecting tubes 16 on both sides, and the connecting piece 17 conducts the current to the conductive piece 20, and then transmits it to the contact block 14 through the cable. When the push block 19 is pulled upward, the conductive piece 20 will be driven upward together. When the conductive piece 20 is separated from the connecting piece 17, the conductive piece 20 and the connecting piece 17 will not be energized, thereby playing a role of isolation, and the circuit can be closed when no detection is required. When the contact block 14 is powered on, the contact block 14 will contact the fourth detection piece 7 and the first detection piece 4, respectively. At this time, the two ends of the fourth detection piece 7 are in contact with the mounting shell 1, and the first detection piece 4 is in contact with the first three-phase line 8 from left to right. The starting resistance tester can detect the resistance value between the first three-phase line 8 and the motor housing, and the test result will be displayed on the instrument. After the test is completed, the power cord is then connected to the power connector 15 to power the electric push rod 12 and the sensor 2. The staff can use the remote control to remotely control the sensor 2 to start the electric push rod 12, and the telescopic rod of the electric push rod 12 retracts to drive the clamping ring 121 to move upward, thereby driving the column 9, the knob 10 and the contact block 14 to move upward, so that they are separated from the fourth detection piece 7 and the first detection piece 4, and the electric push rod 12 is started. After completing the above operations, close the electric push rod 12, then turn the knob 10, use the identification ring 11 as a reference for the orientation, turn the knob 10 90 degrees, and drive the contact block 14 to rotate 90 degrees. At this time, the two contact blocks 14 will be aligned with the fourth detection piece 7 and the third detection piece 6 respectively. Then, the electric push rod 12 drives the column 9 and the contact block 14 to move downward so that they are in contact with the fourth detection piece 7 and the third detection piece 6. When adjusting the position of the contact block 14, the connecting piece 17 can be disconnected from the conductive piece 20 to avoid being affected by the current during the adjustment process. Because the third detection piece 6 is in contact with the third three-phase line 8, the resistance detection between the third three-phase line 8 and the motor housing can be started. After the detection is completed, the contact block 14 is controlled to be lifted again, and the knob 10 is continued to be rotated 90 degrees to drive the contact block 14 to rotate so that it contacts the second detection piece 5 and the third detection piece 6, thereby detecting the resistance between the second and third three-phase lines 8. After the detection is completed, the contact block 14 continues to rotate 90 degrees to control the two contact blocks 14 to contact the second detection piece 5 and the first detection piece 4 respectively, so as to detect the resistance between the first and second three-phase lines 8.

[0032] Finally, in order to detect the resistance between the second three-phase line 8 and the motor housing, and the resistance between the first and third three-phase lines 8, first, by turning the knob 10, the two contact blocks 14 are controlled to be aligned with the eighth detection piece 25 and the sixth detection piece 22 respectively, and then the electric push rod 12 drives the clamping ring 121 and the column 9 to move upward, thereby driving the contact block 14 to move, so that the contact block 14 moves to contact the eighth detection piece 25 and the sixth detection piece 22 above, and the eighth detection piece 25 is connected to the second detection piece 5 to connect the second three-phase line 8 , the sixth detection piece 22 is connected to the fourth detection piece 7 to connect to the motor housing, so that the resistance between the second three-phase line 8 and the motor housing can be detected. After the detection is completed, the above adjustment process is repeated, and the contact block 14 is adjusted to contact the fifth detection piece 21 and the seventh detection piece 23. The fifth detection piece 21 is connected to the first detection piece 4, then the first three-phase line 8 is connected, and the seventh detection piece 23 is connected to the third detection piece 6, then the third three-phase line 8 is connected, so the resistance between the first and third three-phase lines 8 can be detected. In this way, the detection of all six results is completed.

[0033] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A three-phase line detection device based on the research of electric vehicle drive motor speed, characterized by: The invention comprises a mounting shell (1), a sensor (2), a first detection sheet (4), a second detection sheet (5), a third detection sheet (6), a fourth detection sheet (7), a column (9), a knob (10), a contact block (14), a fifth detection sheet (21), a sixth detection sheet (22), a seventh detection sheet (23), an eighth detection sheet (25), a connecting component and a lifting component. The mounting shell (1) is mounted on a motor housing. The rear side of the mounting shell (1) is connected to the sensor (2). The left side of the mounting shell (1) is connected to the fifth detection sheet (21). The bottom of the fifth detection sheet (21) is connected to the first detection sheet (4). The right side of the mounting shell (1) is connected to the seventh detection sheet (23). The bottom of the seventh detection sheet (23) is connected to the first detection sheet (4). A third detection piece (6) is connected, an eighth detection piece (25) is connected to the rear side of the mounting shell (1), the bottom of the eighth detection piece (25) is connected to the second detection piece (5), a sixth detection piece (22) is connected to the rear side of the mounting shell (1), the sixth detection piece (22) is located to the left of the eighth detection piece (25), a fourth detection piece (7) is connected to the front side of the mounting shell (1), a column (9) is slidably and rotatably connected to the middle of the mounting shell (1), a knob (10) is connected to the top of the column (9), contact blocks (14) are connected to both sides of the lower part of the column (9), and initially the two contact blocks (14) are in contact with the fourth detection piece (7) and the first detection piece (4) respectively, and a lifting component and a connecting component are provided on the mounting shell (1).

2. The three-phase line detection device based on the research of the speed of the electric vehicle drive motor according to claim 1 is characterized in that: The connection assembly comprises a connection cylinder (16), a connection sheet (17), a push block (19) and a conductive sheet (20). The right side of the mounting shell (1) is symmetrically connected to the connection cylinder (16) at the front and rear ends, the inner side of the connection cylinder (16) is connected to the connection sheet (17), the top right side of the mounting shell (1) is slidably connected to the push block (19), the bottom front and rear sides of the push block (19) are connected to the conductive sheet (20), the two conductive sheets (20) are in contact with the corresponding connection sheets (17), and the two conductive sheets (20) are respectively connected to the contact block (14) through wires.

3. The three-phase line detection device based on the research of the electric vehicle driving motor speed according to claim 2 is characterized in that: The lifting assembly comprises an electric push rod (12) and a clamping ring (121). The electric push rod (12) is installed on the front side of the interior of the mounting shell (1). The electric push rod (12) is electrically connected to the sensor (2). The clamping ring (121) is connected to the telescopic rod of the electric push rod (12). The clamping ring (121) is rotatably connected to the column (9).

4. The three-phase line detection device based on the research of the speed of the electric vehicle drive motor according to claim 3 is characterized in that: It also includes an identification ring (11), and the top of the mounting shell (1) is connected to the identification ring (11) for indicating the orientation.

5. The three-phase line detection device based on the research of the electric vehicle driving motor speed according to claim 4 is characterized in that: It also includes a cable tie ring (13) and a power connector (15); the cable tie ring (13) is connected to the upper side of the interior of the mounting shell (1); a cable connecting the conductive sheet (20) and the contact block (14) passes through the cable tie ring (13); and the power connector (15) is fixedly connected to the rear side of the mounting shell (1).

6. The three-phase line detection device based on the research of the speed of the electric vehicle driving motor according to claim 5 is characterized in that: An adapter (3) is also included. The left side inside the installation shell (1) is connected to the adapter (3) for cable connection.

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