Fixing equipment for air tightness test of motor end cover

Abstract

The utility model discloses a fixing device for air tightness test of a motor end cover, which belongs to the technical field of motor air tightness detection, and comprises a fixed support and a movable support, the fixed support is fixedly connected with an upper fixed plate, the lower end of the fixed plate is fixedly connected with a plurality of hydraulic rods, the lower ends of the hydraulic rods are fixedly connected with sealing devices, and the sealing devices are fixedly connected with the movable support. The utility model discloses a motor end cover tightness detection device, which comprises a movable support, two sides of the movable support are respectively provided with a screw rod mechanism, the middle part of the movable support is provided with a fixing device, and the fixing device is movably connected with the movable support through the screw rod mechanisms. The motor end cover tightness detection device not only can detect the tightness of a motor end cover, but also can detect the tightness of a motor provided with the motor end cover; the sealing cover, the end cover placing groove and the motor placing groove are replaced through bolts, so that air tightness detection can be conveniently carried out on motor end covers of different sizes or motors provided with the motor end covers.

Description

Technical Field

[0001] The utility model relates to the technical field of motor air tightness detection, in particular to a fixing device for motor end cover air tightness test. Background Art

[0002] The air tightness test of the motor end cover for automobiles is an important part of the manufacturing of new energy vehicles. It is related to whether the automobile motor can effectively prevent water and dust, and ensure the performance and safety of the motor and the whole vehicle. This article will discuss the significance, function, importance and related test methods of the air tightness test of the motor end cover for automobiles from multiple angles.

[0003] The air tightness test of the automobile motor end cover is to ensure that the motor will not be flooded or short-circuited due to poor sealing when driving in harsh environments, such as wading or muddy roads, affecting the performance of the entire vehicle. Air tightness testing can effectively avoid these problems and ensure that the motor can work stably under various climatic conditions, thereby extending the service life of the motor and improving the overall performance and safety of new energy vehicles.

[0004] Air tightness testing is crucial for new energy vehicle motors, because as a power source, the performance of the motor directly affects the vehicle's range and power performance. If the air tightness of the motor end cover is not good, it may cause the motor efficiency to decrease or even fail completely, posing a great hidden danger to driving safety.

[0005] Since the motors used in automobiles are large in size and heavy in weight, when conducting air tightness testing on automobile end covers, it is necessary to conduct air tightness testing not only before the motor end covers are installed, but also after the motor end covers are installed. The existing equipment is not convenient for moving the automobile motor end covers or installing the motor end covers, which reduces the detection efficiency. Different car models require different motor models, and different motor sizes require testing equipment of different specifications, resulting in an increase in the procurement cost of the testing equipment. Utility Model Content

[0006] In order to solve the above technical problems, the utility model provides a fixing device for testing the air tightness of a motor end cover.

[0007] The technical solution of the utility model is: a fixing device for testing the air tightness of a motor end cover, comprising a fixed bracket and a movable bracket, wherein an upper fixing plate is fixedly connected to the fixed bracket, a plurality of hydraulic rods are fixedly connected to the lower end of the fixed plate, a closing device is fixedly connected to the lower end of the hydraulic rod, screw mechanisms are provided on both sides of the movable bracket, a fixing device is provided in the middle of the movable bracket, and the fixing device is movably connected to the movable bracket through the screw mechanism.

[0008] Furthermore, the closing device includes a closing plate, the top of the closing plate is fixedly connected to the lower end of the hydraulic rod, the middle of the closing plate is fixedly connected to a closed cover, the top of the closed cover is provided with an inflation interface, the inflation interface is externally connected to an air supply pipe, the top inner wall of the closed cover is fixedly connected to an air pressure sensor, the side of the fixed bracket is fixedly connected to a display for displaying the air pressure inside the closed cover, and the display is electrically connected to the air pressure sensor.

[0009] Note: Seal the motor end cover with a closing cover whose shape can be changed. Then fill the inside of the closing cover with air. When the filling of air stops, observe whether the air pressure drops through the display to determine whether the air tightness of the motor end cover is qualified.

[0010] Furthermore, the fixing device includes a connecting base plate, both sides of which are slidably connected to the movable bracket and are connected to the screw mechanism by screw transmission, the top of the connecting base plate is connected to an end cover placement groove for placing the motor end cover, and the bottom of the connecting base plate is connected to a motor placement groove for placing the motor.

[0011] Description: The fixing device is used to fix the motor end cover or the motor with the motor end cover installed, and the movable bracket is convenient for moving the motor end cover or the motor with the motor end cover installed.

[0012] Furthermore, the screw mechanism includes a transmission screw, the upper and lower ends of which pass through a connecting bottom plate and are rotatably connected to the movable bracket, and a rotating motor for driving the transmission screw to rotate is fixedly connected to the top of the movable bracket.

[0013] Description: The connecting bottom plate is lifted by the screw mechanism so that the motor end cover or the motor with the motor end cover installed is engaged with the sealing cover to form a closed space.

[0014] Furthermore, the fixed bracket is fixedly connected to two guide rails, and the movable bracket is rotatably connected to guide wheels for rolling on the guide rails.

[0015] Description: The guide wheel moves on the guide rail to facilitate the alignment of the motor end cover or the motor with the motor end cover installed with the sealing cover.

[0016] The beneficial effects of the utility model are:

[0017] The utility model can not only detect the airtightness of the motor end cover, but also detect the airtightness of the motor installed with the motor end cover. The airtight cover, the end cover placement groove and the motor placement groove are replaced by bolts to facilitate airtightness detection of motor end covers of different sizes or motors installed with motor end covers. The detection is performed by observing the pressure changes of the air pressure sensor. The motor end cover or the motor installed with the motor end cover is convenient to move during movement, which saves manpower transportation costs to a certain extent. During the process of producing motors, the device is convenient for replacing production lines of different motor models. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of the utility model.

[0019] Figure 2 It is a top view of the connection base plate of the utility model.

[0020] Among them, 1-fixed bracket, 2-movable bracket, 3-fixed plate, 4-hydraulic rod, 5-closing device, 6-screw mechanism, 7-fixing device, 51-closing plate, 52-sealed cover, 53-inflation interface, 54-air pressure sensor, 55-display, 71-connecting base plate, 72-end cover placement slot, 73-motor placement slot, 61-transmission screw, 62-rotating motor, 11-guide rail, 21-guide wheel. DETAILED DESCRIPTION

[0021] Embodiment 1:

[0022] like Figure 1 As shown, a fixing device for testing the air tightness of a motor end cover comprises a fixed bracket 1 and a movable bracket 2, the fixed bracket 1 is fixedly connected with an upper fixing plate 3, the lower end of the fixed plate 3 is fixedly connected with a plurality of hydraulic rods 4, the lower end of the hydraulic rods 4 is fixedly connected with a closing device 5, screw mechanisms 6 are provided on both sides of the movable bracket 2, a fixing device 7 is provided in the middle of the movable bracket 2, and the fixing device 7 is movably connected to the movable bracket 2 through the screw mechanism 6.

[0023] The closing device 5 includes a closing plate 51, the top of which is fixedly connected to the lower end of the hydraulic rod 4, a closed cover 52 is fixedly connected to the middle of the closing plate 51 by bolts, an inflation interface 53 is provided on the top of the closed cover 52, the inflation interface 53 is externally connected to an air supply pipeline, an air pressure sensor 54 is fixedly connected to the inner wall of the top of the closed cover 52, a display 55 for displaying the internal air pressure of the closed cover 52 is fixedly connected to the side of the fixed bracket 1, and the display 55 is electrically connected to the air pressure sensor 54.

[0024] The motor end cover is closed by a closing cover 52, the shape of which can be changed, and then the inside of the closing cover 52 is filled with air. When the filling of air is stopped, the display 55 is used to observe whether the air pressure drops, thereby judging whether the air tightness of the motor end cover is qualified.

[0025] like Figure 2 As shown, the fixing device 7 includes a connecting base plate 71, both sides of which are slidably connected to the movable bracket 2 and are connected to the screw mechanism screw transmission, the top of the connecting base plate 71 is detachably connected with an end cover placement groove 72 for placing the motor end cover by bolts, and the bottom of the connecting base plate 71 is detachably connected with a motor placement groove 73 for placing the motor by bolts.

[0026] The fixing device 7 is used to fix the motor end cover or the motor with the motor end cover installed, and the movable bracket 2 facilitates the movement of the motor end cover or the motor with the motor end cover installed.

[0027] The screw mechanism 6 includes a transmission screw 61 , the upper and lower ends of which pass through the connecting bottom plate 71 and are rotatably connected to the movable bracket 2 , and a rotating motor 62 is fixedly connected to the top of the movable bracket 2 for driving the transmission screw 61 to rotate.

[0028] The connecting bottom plate 71 is lifted by the screw mechanism 6 so that the motor end cover or the motor with the motor end cover installed is engaged with the sealing cover 52 to form a closed space.

[0029] Embodiment 2:

[0030] Based on Example 1, Example 2 differs from Example 1 in that two guide rails 11 are fixedly connected to the fixed bracket 1, and guide wheels 21 for rolling on the guide rails 11 are rotatably connected to the movable bracket 2.

[0031] The guide wheel 21 in the second embodiment moves on the guide track 11, so as to facilitate the alignment of the motor end cover or the motor on which the motor end cover is installed with the sealing cover 52. Therefore, the second embodiment has a better use effect than the first embodiment.

[0032] The working method of the above embodiment 1 comprises the following steps:

[0033] S1. Inspection of the motor end cover before installation:

[0034] Place the motor end cover in the end cover placement slot 72, then push the mobile bracket 2 to the bottom of the sealed cover 52, adjust the height of the motor end cover by the screw mechanism 6, and then lower the height of the fixing plate 3 by the night-pressing rod 4 so that the sealed cover 52 and the motor end cover are tightly combined, and fill the sealed cover 52 with gas through the inflation interface until the display 55 shows that the relative air pressure in the sealed cover reaches 0.3Mpa, then stop inflating, wait for 2 minutes, and observe whether the air pressure on the display drops. If it drops, it is unqualified, and if it remains unchanged, it is qualified;

[0035] S2. Check the motor end cover after installation:

[0036] Place the motor end cover in the end cover placement groove 72, and then push the movable bracket 2 to just below the sealed cover 52, adjust the height of the motor end cover through the screw mechanism 6, and then lower the height of the fixed plate 3 through the night pressing rod 4 so that the sealed cover 52 is tightly combined with one side of the motor to form a closed space, and fill the sealed cover 52 with gas through the inflation interface until the display 55 shows that the relative air pressure in the sealed cover reaches 0.3Mpa. Stop inflation, wait for 2 minutes, and observe whether the air pressure on the display drops. If it drops, it is unqualified, and if it remains unchanged, it is qualified.

[0037] In the above embodiments, the rotating motor 62, the air pressure sensor 54, and the display 55 are all commercially available products. As long as they can achieve the functions of the utility model, those skilled in the art can choose to use them according to common sense, and no special limitation is made here.

Claims

1. A fixing device for testing the air tightness of a motor end cover, characterized in that: The invention comprises a fixed support (1) and a movable support (2), wherein an upper fixed plate (3) is fixedly connected to the fixed support (1), a plurality of hydraulic rods (4) are fixedly connected to the lower end of the fixed plate (3), a closing device (5) is fixedly connected to the lower end of the hydraulic rod (4), screw mechanisms (6) are provided on both sides of the movable support (2), a fixing device (7) is provided in the middle of the movable support (2), and the fixing device (7) is movably connected to the movable support (2) via the screw mechanism (6).

2. A fixing device for testing the air tightness of a motor end cover as claimed in claim 1, characterized in that: The closing device (5) comprises a closing plate (51), the top of which is fixedly connected to the lower end of the hydraulic rod (4), the middle of which is fixedly connected to a sealed cover (52), the top of which is provided with an air charging interface (53), the air charging interface (53) being externally connected to an air supply pipeline, the top inner wall of the sealed cover (52) being fixedly connected to an air pressure sensor (54), and the side of the fixed bracket (1) being fixedly connected to a display (55) for displaying the air pressure inside the sealed cover (52), the display (55) being electrically connected to the air pressure sensor (54).

3. A fixing device for testing the air tightness of a motor end cover as claimed in claim 1, characterized in that: The fixing device (7) comprises a connecting base plate (71), the two sides of which are slidably connected to the movable bracket (2) and are drivingly connected to the screw rod of the screw mechanism, the top of the connecting base plate (71) is connected to an end cover placement groove (72) for placing the motor end cover, and the bottom of the connecting base plate (71) is connected to a motor placement groove (73) for placing the motor.

4. A fixing device for testing the air tightness of a motor end cover as claimed in claim 3, characterized in that: The screw mechanism (6) comprises a transmission screw (61), the upper and lower ends of which pass through a connecting bottom plate (71) and are rotationally connected to the movable bracket (2), and the top of the movable bracket (2) is fixedly connected with a rotating motor (62) for driving the transmission screw (61) to rotate.

5. A fixing device for testing the air tightness of a motor end cover as claimed in claim 1, characterized in that: The fixed bracket (1) is fixedly connected to two guide rails (11), and the movable bracket (2) is rotatably connected to guide wheels (21) for rolling on the guide rails (11).

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