Detection tool for motor cooling oil pipe

Abstract

The utility model provides a testing fixture for a cooling oil pipe of a motor, which comprises a bottom plate. The bottom is provided with a positioning assembly used for positioning the cooling oil pipe, a pressing assembly used for being matched with the positioning assembly to clamp the cooling oil pipe, a pipe end detection assembly used for conducting position degree detection on the pipe end of the cooling oil pipe, and a small hole detection assembly used for conducting position degree detection on a small spraying hole of the cooling oil pipe. According to the utility model, the problem of how to carry out more accurate and more efficient position degree detection on each pipe end and a small spraying hole on the pipe fitting of the cooling oil pipe in the prior art is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of detection of motor cooling oil pipes of new energy vehicles, in particular to a detection tool for motor cooling oil pipes. Background Art

[0002] At present, the cooling oil pipes used in the motors of new energy vehicles contain multiple pipe ends and multiple injection holes. In order to ensure the qualified rate of the cooling oil pipes, the cooling oil pipes need to be 100% inspected without omission, especially for each pipe end and injection hole on the pipe fittings of the cooling oil pipes, no missed inspection or misjudgment should occur. At present, the position accuracy of the cooling oil pipes is manually inspected by measuring methods such as calipers and three-coordinate detection. The operation is complicated, and missed inspection and / or misjudgment are prone to occur due to human factors, resulting in low inspection efficiency.

[0003] Therefore, how to perform more accurate and efficient position detection on each pipe end and injection hole on the cooling oil pipe fittings becomes a technical problem that needs to be solved. Utility Model Content

[0004] The purpose of the utility model is to provide a gauge for motor cooling oil pipes, mainly to solve the problem of how to more accurately and efficiently detect the position of each pipe end and injection hole on the pipe fittings of the cooling oil pipe in the above-mentioned prior art, and to provide a gauge for motor cooling oil pipes.

[0005] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is: a gauge for a motor cooling oil pipe, characterized in that: the gauge includes a base plate, on the bottom of which is provided a positioning assembly for positioning the cooling oil pipe, a clamping assembly for cooperating with the positioning assembly to clamp the cooling oil pipe, a pipe end detection assembly for detecting the position of the pipe end of the cooling oil pipe, and a small hole detection assembly for detecting the position of the injection small hole of the cooling oil pipe.

[0006] Further, the positioning assembly includes a first positioning portion and two second positioning portions, which are arranged in a triangle on the bottom plate;

[0007] A first V-shaped groove matching the pipe body of the cooling oil pipe is provided on the top of the first positioning portion, and a positioning protrusion matching the flange mounting hole of the cooling oil pipe is provided on one side of the first positioning portion;

[0008] The top of the second positioning portion is flat.

[0009] Furthermore, the clamping assembly includes a clamp seat and a clamp. The clamp seat is arranged on the base plate, the clamp seat is connected to the clamp, the clamp is connected to one end of the moving rod, and the other end of the moving rod is connected to the clamping block. The clamping block and the positioning protrusion are located on the same axis, and the clamping block cooperates with the first positioning part to clamp the flange of the cooling oil pipe.

[0010] Further, the pipe end detection assembly includes a set of first pipe end detection devices and six sets of second pipe end detection devices, corresponding to the seven pipe ends of the cooling oil pipe respectively;

[0011] The first pipe end detection device comprises a first fixing seat and an L-shaped first connecting rod, the first fixing seat is arranged on the bottom plate, the long side of the first connecting rod passes through the first fixing seat and is connected to the first handle part, the short side of the first connecting rod is connected to the first inspection sleeve, and the first inspection sleeve corresponds to a pipe end of the cooling oil pipe; a plurality of first positioning holes are arranged on the long side of the first connecting rod; a first limiting block and a first positioning pin are arranged on the top of the first fixing seat, a first convex block is arranged in the middle part of the first positioning pin, a first concave part is arranged on the side of the first limiting block facing the first positioning pin, a first sensor is arranged in the first concave part, when the first positioning pin is embedded in the corresponding first positioning hole, the first positioning pin is rotated so that the first convex block is embedded in the first concave part, and the first sensor senses the first convex block;

[0012] Each set of second pipe end detection devices includes a second fixing seat and a second connecting rod, the second fixing seat is arranged on the bottom plate, the second connecting rod passes through the second fixing seat, one end of the second connecting rod is connected to the second handle part, and the other end of the second connecting rod is connected to the second inspection sleeve, and the second inspection sleeve corresponds to a corresponding pipe end of the cooling oil pipe;

[0013] A second protrusion is provided on the second connecting rod between the second fixing seat and the second handle part, a second limiting block is provided on the side of the second fixing seat facing the second handle part, a second inner recess is provided on the side of the second limiting block facing the second connecting rod, a second sensor is provided in the second inner recess, and when the second inspection sleeve is nested in a corresponding pipe end of the cooling oil pipe, the second handle part is rotated so that the second protrusion is embedded in the second inner recess, and the second sensor senses the second protrusion.

[0014] Furthermore, the small hole detection assembly includes seven groups of small hole detection devices, corresponding to the seven injection small holes of the cooling oil pipe respectively;

[0015] Each group of small hole detection devices includes a third fixed seat and a third inspection pin. The third fixed seat is arranged on the bottom plate. The top of the third inspection pin passes through the third fixed seat and is connected to the third handle part. The third inspection pin between the third handle part and the third fixed seat is provided with a third protrusion. The third fixed seat is also provided with a third limit block. The third limit block is provided with a third recessed portion on the side facing the third inspection pin. The third recessed portion is provided with a third sensor. When the third inspection pin is embedded in the corresponding injection small hole, the third handle part is rotated so that the third protrusion is embedded in the third recessed portion, and the third sensor senses the third protrusion.

[0016] Further, the bottom plate is provided with a through hole;

[0017] The first sensor, the second sensor and the third sensor are connected to the control mechanism

[0018] Furthermore, the moving rod brings the pressing block to translate along the axial direction of the positioning protrusion.

[0019] In view of the above technical features, the utility model has the following beneficial effects:

[0020] 1. A checking fixture for motor cooling oil pipes, which is provided with a positioning component, a clamping component, a pipe end detection component and a small hole detection component. Manually, only the checking sleeve of the pipe end detection component and the checking pin of the small hole detection component are pushed, and the corresponding sensors are used to realize whether the positions of each pipe end of the cooling oil pipe and multiple injection holes are accurate, thereby realizing semi-automatic identification, making the detection operation more efficient and the detection results more accurate. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of a checking fixture for a motor cooling oil pipe in specific embodiment 1 (stereoscopic view, without the cooling oil pipe installed);

[0022] Figure 2 It is a structural schematic diagram of a checking fixture for a motor cooling oil pipe in specific embodiment 1 (top view angle, without the cooling oil pipe installed);

[0023] Figure 3 It is a structural schematic diagram of a checking fixture for a motor cooling oil pipe in specific embodiment 1 (stereoscopic view, with the cooling oil pipe installed);

[0024] Figure 4 It is a structural schematic diagram of a checking fixture for a motor cooling oil pipe in specific embodiment 1 (top view angle, with the cooling oil pipe installed);

[0025] Figure 5 is a schematic diagram of the structure after the positioning assembly and the cooling oil pipe are installed in the specific embodiment 1 (stereoscopic perspective);

[0026] Figure 6 is a schematic diagram of the structure after the positioning assembly and the cooling oil pipe are installed in the specific embodiment 1 (top view angle);

[0027] Figure 7 is a structural schematic diagram of the clamping assembly in specific embodiment 1 (front view angle);

[0028] Figure 8 is a structural schematic diagram of the positioning component in specific embodiment 1 (front view angle);

[0029] Fig. 9 is a structural schematic diagram of the first pipe end detection device in specific embodiment 1 (front view angle);

[0030] Fig.10 is a structural schematic diagram of the second pipe end detection device in specific embodiment 1 (front view angle);

[0031] Fig.11 It is a structural schematic diagram of the small hole detection component in specific embodiment 1 (front view angle).

[0032] In the figure: 1, cooling oil pipe; 1-1, pipe end; 1-2, injection hole; 1-3, flange; 1-3-1, flange mounting hole;

[0033] 2. Positioning assembly; 2-1. First positioning portion; 2-1-1. First V-shaped groove; 2-1-2. Positioning protrusion; 2-2. Second positioning portion;

[0034] 3. Clamping assembly; 3-1. Clamp seat; 3-2. Clamping block; 3-3. Clamp; 3-4. Moving rod;

[0035] 4-1, first pipe end detection device; 4-1-1, first fixing seat; 4-1-2, first connecting rod; 4-1-4, first inspection sleeve; 4-1-5, first handle; 4-1-6, first limit block; 4-1-7, first inner concave portion; 4-1-8, first convex block; 4-1-9, first positioning pin; 4-1-10, first sensor;

[0036] 4-2, second pipe end detection device; 4-2-1, second fixing seat; 4-2-2, second connecting rod; 4-2-3, second inspection sleeve; 4-2-4, second handle; 4-2-5, second limit block; 4-2-6, second inner concave portion; 4-2-7, second convex block;

[0037] 5. Small hole detection assembly; 5-1. Small hole detection device; 5-1-1. Third fixing seat; 5-1-2. Third inspection pin; 5-1-3. Third handle; 5-1-4. Third protrusion; 5-1-5. Third limit block; 5-1-6. Third inner concave portion; 5-1-7. Third sensor;

[0038] 6. Bottom plate; 6-1. Through hole. DETAILED DESCRIPTION

[0039] The present invention is further described below in conjunction with specific embodiments. It should be understood that these embodiments are only used to illustrate the present invention and are not used to limit the scope of the present invention. In addition, it should be understood that after reading the content taught by the present invention, those skilled in the art can make various changes or modifications to the present invention, and these equivalent forms also fall within the scope defined by the claims attached to this application.

[0040] See also Figures 1 to 11, Specific embodiment 1, this embodiment 1 provides a gauge for a motor cooling oil pipe 1, the gauge includes a base plate 6, the bottom of which is provided with a positioning component 2 for positioning the cooling oil pipe 1, a clamping component 3 for cooperating with the positioning component 2 to clamp the cooling oil pipe 1, a pipe end detection component for detecting the position of the pipe end 1-1 of the cooling oil pipe 1, and a small hole detection component 5 for detecting the position of the injection small hole 1-2 of the cooling oil pipe 1.

[0041] The positioning assembly 2 includes a first positioning portion 2-1 and two second positioning portions 2-2, which are arranged in a triangle on the bottom plate 6. The top of the first positioning portion 2-1 is provided with a first V-shaped groove 2-1-1 that matches the pipe body of the cooling oil pipe 1, and one side of the first positioning portion 2-1 is provided with a positioning protrusion 2-1-2 that matches the flange mounting hole 1-3-1 of the cooling oil pipe 1. The top of the second positioning portion 2-2 is flat. The product positioning assembly 2 is used for initial positioning when placing the product to be tested.

[0042] The first positioning part 2-1 and the two second positioning parts 2-2 are arranged in a triangular direction. The first V-shaped groove 2-1-1 of the first positioning part 2-1 plays a pre-positioning role for a section of the cooling oil pipe 1. Then the positioning protrusion 2-1-2 of the first positioning part 2-1 is embedded in the flange mounting hole 1-3-1 of the cooling oil pipe 1. At this time, the cooling oil pipe 1 has been basically positioned, and then the other two sections of the cooling oil pipe 1 are placed on the top plane of the two second positioning parts 2-2. The plane design of the top of the second positioning part 2-2 can avoid interference between the second positioning part 2-2 and the first V-shaped groove 2-1-1 and the positioning protrusion 2-1-2 of the first positioning part 2-1. Through a first positioning part 2-1 and two second positioning parts 2-2, the triangle is fixed more stably. After the position of the cooling oil pipe 1 is fixed, it is convenient for the pipe end detection component and the small hole detection component 5 to subsequently detect the position of the pipe end 1-1 and the injection small hole 1-2 of the cooling oil pipe 1.

[0043] The clamping assembly 3 includes a clamp seat 3-1 and a clamp 3-3. The clamp seat 3-1 is arranged on the bottom plate 6. The clamp seat 3-1 is connected to the clamp 3-3. The clamp 3-3 is connected to one end of the moving rod 3-4. The other end of the moving rod 3-4 is connected to the clamping block 3-2. The clamping block 3-2 is located on the same axis as the positioning protrusion 2-1-2. The clamping block 3-2 cooperates with the first positioning part 2-1 to clamp the flange 1-3 of the cooling oil pipe 1. The clamp 3-3 controls the translation of the moving rod 3-4. The moving rod 3-4 drives the clamping block 3-2 to move (that is, the moving rod 3-4 drives the clamping block 3-2 to translate along the axis direction of the positioning protrusion 2-1-2). The clamping block 3-2 is pressed on the positioning protrusion 2-1-2. The clamping block 3-2 and the first positioning part 2-1 press the flange 1-3 of the cooling oil pipe 1, thereby indirectly realizing the clamping function of the cooling oil pipe 1. The clamping assembly 3 is used to clamp the pipe fitting during testing to ensure that the pipe fitting is in a unique position. The clamping assembly can be a quick clamp, the brand is Gao Dehua, and the model is GH-36070.

[0044] The clamping block 3-2 and the positioning protrusion 2-1-2 are located on the same axis, and the clamping block 3-2 translates forward and backward along the axis. When the clamping block 3-2 is pressed on the flange 1-3 of the cooling oil pipe 1, the position of the positioning protrusion 2-1-2 is equivalent to the position of the bolt in the flange 1-3 of the cooling oil pipe 1 when the cooling oil pipe 1 is installed with the counterpart. This can more accurately simulate the position of the cooling oil pipe 1 in the bolted installation state, and ensure the accuracy of the detection result when the pipe end detection component and the small hole detection component 5 subsequently perform position detection on the pipe end 1-1 and the injection small hole 1-2 of the cooling oil pipe 1.

[0045] The pipe end detection assembly includes a set of first pipe end detection devices 4 - 1 and six sets of second pipe end detection devices 4 - 2 , which correspond to the seven pipe ends 1 - 1 of the cooling oil pipe 1 respectively;

[0046] The first pipe end detection device 4-1 includes a first fixed seat 4-1-1 and an L-shaped first connecting rod 4-1-2. The first fixed seat 4-1-1 is arranged on the bottom plate 6. The long side of the first connecting rod 4-1-2 passes through the first fixed seat 4-1-1 and is connected to the first handle part 4-1-5. The short side of the first connecting rod 4-1-2 is connected to the first inspection sleeve 4-1-4. The first inspection sleeve 4-1-4 corresponds to a pipe end 1-1 of the cooling oil pipe 1. The long side of the first connecting rod 4-1-2 is provided with a plurality of first positioning holes (not shown in the attached figure). The top of the first fixed seat 4-1-1 is provided with a first limit block 4-1-6 and a first positioning pin 4-1-9. The middle part of the first positioning pin 4-1-9 A first protrusion 4-1-8 is provided, and a first recess 4-1-7 is provided on the side of the first limiting block 4-1-6 facing the first positioning pin 4-1-9, and a first sensor 4-1-10 is provided in the first recess 4-1-7. When the first positioning pin 4-1-9 is embedded in the corresponding first positioning hole, the first positioning pin 4-1-9 is rotated so that the first protrusion 4-1-8 is embedded in the first recess 4-1-7, and the first sensor 4-1-10 senses the first protrusion 4-1-8. At this time, the first positioning pin 4-1-9 is embedded in the first positioning hole to limit the movement of the first connecting rod 4-1-2. At the same time, it can be confirmed that the first inspection sleeve 4-1-4 corresponds to the pipe end 1-1 of the cooling oil pipe 1. Accurate position. When the first inspection sleeve 4-1-4 is sleeved on the pipe end 1-1 of the corresponding cooling oil pipe 1, the first positioning pin 4-1-9 is rotated, but the first protrusion 4-1-8 cannot be embedded in the first recessed portion 4-1-7, the first sensor 4-1-10 cannot sense the first protrusion 4-1-8. At this time, it can be determined that the position of the pipe end 1-1 of the cooling oil pipe 1 is inaccurate.

[0047] The cooling oil pipe 1 is fixed by the positioning assembly 2 and the clamping assembly 3. The first inspection sleeve 4-1-4 corresponds to the pipe end 1-1 of the cooling oil pipe 1 and is located directly above the flange 1-3 of the cooling oil pipe 1. The L-shaped first connecting rod 4-1-2 can avoid position interference between the clamp seat 3-1 and the first fixing seat 4-1-1. The space on the bottom plate 6 is reasonably utilized to arrange the first pipe end detection device 4-1 and the clamping assembly 3.

[0048] Each set of second pipe end detection devices 4-2 includes a second fixed seat 4-2-1 and a second connecting rod 4-2-2. The second fixed seat 4-2-1 is arranged on the bottom plate 6. After the second connecting rod 4-2-2 passes through the second fixed seat 4-2-1, one end of the second connecting rod 4-2-2 is connected to the second handle 4-2-4, and the other end of the second connecting rod 4-2-2 is connected to the second inspection sleeve 4-2-3. The second inspection sleeve 4-2-3 corresponds to a corresponding pipe end 1-1 of the cooling oil pipe 1; the second connecting rod 4-2-2 between the second fixed seat 4-2-1 and the second handle 4-2-4 is connected to the second inspection sleeve 4-2-3. A second convex block 4-2-7 is arranged on the second fixing seat 4-2-1, a second stopper block 4-2-5 is arranged on the side facing the second handle portion 4-2-4, a second inner recess 4-2-6 is arranged on the side facing the second connecting rod 4-2-2, a second sensor is arranged in the second inner recess 4-2-6, when the second inspection sleeve 4-2-3 is nested in a corresponding pipe end 1-1 of the cooling oil pipe 1, the second handle portion 4-2-4 is rotated so that the second convex block 4-2-7 is embedded in the second inner recess 4-2-6, and the second sensor senses the second convex block 4-2-7. At this time, it can be confirmed that the position of the pipe end 1-1 of the cooling oil pipe 1 corresponding to the second inspection sleeve 4-2-3 is accurate. When the second inspection sleeve 4-2-3 is sleeved on the pipe end 1-1 of the corresponding cooling oil pipe 1, the second handle 4-2-4 is rotated, but the second protrusion 4-2-7 cannot be embedded in the second recess 4-2-6, the second sensor cannot sense the second protrusion 4-2-7. At this time, it can be determined that the position of the pipe end 1-1 of the cooling oil pipe 1 is inaccurate.

[0049] The small hole detection assembly 5 includes seven groups of small hole detection devices 5-1, which correspond to the seven injection holes 1-2 of the cooling oil pipe 1 respectively; each group of small hole detection devices 5-1 includes a third fixing seat 5-1-1 and a third inspection pin 5-1-2, the third fixing seat 5-1-1 is set on the bottom plate 6, the top of the third inspection pin 5-1-2 passes through the third fixing seat 5-1-1 and is connected to the third handle part 5-1-3, and the third inspection pin 5-1-2 between the third handle part 5-1-3 and the third fixing seat 5-1-1 is provided with a third protrusion 5 -1-4, the third fixing seat 5-1-1 is also provided with a third limit block 5-1-5, the third limit block 5-1-5 is provided with a third inner recess 5-1-6 on the side facing the third inspection pin 5-1-2, and the third inner recess 5-1-6 is provided with a third sensor 5-1-7. When the third inspection pin 5-1-2 is embedded in the corresponding injection hole 1-2, the third handle 5-1-3 is rotated so that the third convex block 5-1-4 is embedded in the third inner recess 5-1-6, and the third sensor 5-1-7 senses the third convex block 5-1-4. At this time, it can be confirmed that the third inspection pin 5-1-2 is accurately positioned in the injection hole 1-2 corresponding to the cooling oil pipe 1. When the third inspection pin 5-1-2 is embedded in the corresponding injection hole 1-2 of the cooling oil pipe 1, the third handle part 5-1-3 is rotated, but the third protrusion 5-1-4 cannot be embedded in the third recessed part 5-1-6, the third sensor 5-1-7 cannot sense the third protrusion 5-1-4. At this time, it can be determined that the position of the injection hole 1-2 of the cooling oil pipe 1 is inaccurate.

[0050] The bottom plate 6 is provided with a through hole 6-1 to help reduce the weight of the bottom plate 6 and the overall weight of the gauge. The first sensor 4-1-10, the second sensor (not shown in the figure) and the third sensor 5-1-7 are connected to a control mechanism, which may be a PLC.

[0051] The utility model discloses a checking fixture for a motor cooling oil pipe 1, and the specific use method is as follows:

[0052] First, the cooling oil pipe 1 is positioned using the positioning assembly 2 so that the positioning protrusion 2-1-2 is embedded in the flange mounting hole 1-3-1 of the cooling oil pipe 1;

[0053] Then, by manually operating the clamp 3-3 of the pressing assembly 3, the pressing block 3-2 of the pressing assembly 3 presses the flange 1-3 of the cooling oil pipe 1 onto the first positioning portion 2-1, thereby indirectly achieving the pressing of the cooling oil pipe 1;

[0054] Secondly, manually control the first handle so that the first inspection sleeve 4-1-4 covers the pipe end 1-1 of the corresponding cooling oil pipe 1 and inserts the first positioning pin 4-1-9 into the corresponding first positioning hole, rotate the first positioning pin 4-1-9 so that the first protrusion 4-1-8 is inserted into the first inner recess 4-1-7, and the first sensor 4-1-10 senses the first protrusion 4-1-8;

[0055] Again, manually control the second handle 4-2-4 so that the second inspection sleeve 4-2-3 covers the pipe end 1-1 of the corresponding cooling oil pipe 1, and rotate the second handle 4-2-4 so that the second convex block 4-2-7 is embedded in the second concave portion 4-2-6, and the second sensor senses the second convex block 4-2-7;

[0056] Finally, manually control the third handle so that the third inspection pin 5-1-2 is embedded in the corresponding injection hole 1-2, and at the same time rotate the third handle part 5-1-3 so that the third protrusion 5-1-4 is embedded in the third inner concave part 5-1-6, and the third sensor 5-1-7 senses the third protrusion 5-1-4. If the first sensor 4-1-10 senses the first protrusion 4-1-8, the second sensor senses the second protrusion 4-2-7, and the third sensor 5-1-7 senses the third protrusion 5-1-4, it can be determined that the position of the pipe end 1-1 of the cooling oil pipe 1 and the injection hole 1-2 are accurate, and the result is fed back to the control mechanism to realize the semi-automatic recognition function of the inspection tool, that is, manually control the clamping component 3, the pipe end detection component and the hole detection component 5, and the first sensor 4-1-10, the second sensor and the third sensor 5-1-7 automatically detect and determine whether the corresponding position is accurate, realizing a manual and automatic detection method, that is, a semi-automatic recognition inspection tool, which is simple to operate, efficient, and more accurate in position detection.

[0057] Only when one first sensor 4-1-10, six second sensors and seven third sensors 5-1-7 all give qualified feedback to the control mechanism (i.e., the sensors detect the corresponding bumps), the control mechanism will conclude that the position of the pipe end 1-1 and the injection hole 1-2 of the cooling oil pipe 1 is accurate. Otherwise, the control mechanism prompts that it is unqualified, and the operator needs to check whether there are omissions (for example, the inspection sleeve does not cover the pipe end 1-1 and / or the inspection pin is not inserted into the injection hole 1-2) or out-of-tolerance behavior (i.e., the position is not accurate), reduce the influence of human measurement factors, improve the accuracy of position detection, meet the requirements of local multi-point intensive detection of the cooling oil pipe 1, reduce missed detection and misjudgment, avoid human factors, and ensure that the spatial position of all produced products can be 100% detected.

[0058] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A checking fixture for motor cooling oil pipe, characterized in that: The inspection tool comprises a bottom plate (6), on the bottom of which are provided a positioning component (2) for positioning a cooling oil pipe (1), a clamping component (3) for cooperating with the positioning component (2) to clamp the cooling oil pipe (1), a pipe end detection component for detecting the position of a pipe end (1-1) of the cooling oil pipe (1), and a small hole detection component (5) for detecting the position of a small injection hole (1-2) of the cooling oil pipe (1).

2. A checking fixture for motor cooling oil pipe according to claim 1, characterized in that: The positioning assembly (2) comprises a first positioning portion (2-1) and two second positioning portions (2-2), which are arranged in a triangle on the bottom plate (6); A first V-shaped groove (2-1-1) matching the tube body of the cooling oil pipe (1) is provided on the top of the first positioning portion (2-1), and a positioning protrusion (2-1-2) matching the flange mounting hole (1-3-1) of the cooling oil pipe (1) is provided on one side of the first positioning portion (2-1); The top of the second positioning portion (2-2) is flat.

3. A checking fixture for motor cooling oil pipe according to claim 2, characterized in that: The clamping assembly (3) comprises a clamp seat (3-1) and a clamp (3-3); the clamp seat (3-1) is arranged on a base plate (6); the clamp seat (3-1) is connected to the clamp (3-3); the clamp (3-3) is connected to one end of a moving rod (3-4); the other end of the moving rod (3-4) is connected to a clamping block (3-2); the clamping block (3-2) and the positioning protrusion (2-1-2) are located on the same axis; the clamping block (3-2) cooperates with the first positioning portion (2-1) to clamp the flange (1-3) of the cooling oil pipe (1).

4. A checking fixture for motor cooling oil pipe according to claim 3, characterized in that: The pipe end detection assembly comprises a group of first pipe end detection devices (4-1) and six groups of second pipe end detection devices (4-2), which respectively correspond to seven pipe ends (1-1) of the cooling oil pipe (1); The first pipe end detection device (4-1) comprises a first fixing seat (4-1-1) and an L-shaped first connecting rod (4-1-2); the first fixing seat (4-1-1) is arranged on a bottom plate (6); the long side of the first connecting rod (4-1-2) passes through the first fixing seat (4-1-1) and is connected to a first handle portion (4-1-5); the short side of the first connecting rod (4-1-2) is connected to a first inspection sleeve (4-1-4); the first inspection sleeve (4-1-4) corresponds to a pipe end (1-1) of the cooling oil pipe (1); and a plurality of first positioning holes are arranged on the long side of the first connecting rod (4-1-2); A first limiting block (4-1-6) and a first positioning pin (4-1-9) are provided on the top of the first fixing seat (4-1-1), a first convex block (4-1-8) is provided in the middle of the first positioning pin (4-1-9), a first inner recess (4-1-7) is provided on the side of the first limiting block (4-1-6) facing the first positioning pin (4-1-9), a first sensor (4-1-10) is provided in the first inner recess (4-1-7), when the first positioning pin (4-1-9) is embedded in the corresponding first positioning hole, the first positioning pin (4-1-9) is rotated so that the first convex block (4-1-8) is embedded in the first inner recess (4-1-7), and the first sensor (4-1-10) senses the first convex block (4-1-8); Each set of second pipe end detection devices (4-2) comprises a second fixed seat (4-2-1) and a second connecting rod (4-2-2); the second fixed seat (4-2-1) is arranged on a bottom plate (6); after the second connecting rod (4-2-2) passes through the second fixed seat (4-2-1), one end of the second connecting rod (4-2-2) is connected to a second handle portion (4-2-4); the other end of the second connecting rod (4-2-2) is connected to a second inspection sleeve (4-2-3); the second inspection sleeve (4-2-3) corresponds to a corresponding pipe end (1-1) of the cooling oil pipe (1); A second protrusion (4-2-7) is provided on the second connecting rod (4-2-2) between the second fixing seat (4-2-1) and the second handle portion (4-2-4); a second limiting block (4-2-5) is provided on the side of the second fixing seat (4-2-1) facing the second handle portion (4-2-4); a second inner recess (4-2-6) is provided on the side of the second limiting block (4-2-5) facing the second connecting rod (4-2-2); a second sensor is provided in the second inner recess (4-2-6); when the second inspection sleeve (4-2-3) is nested in a corresponding pipe end (1-1) of the cooling oil pipe (1), the second handle portion (4-2-4) is rotated so that the second protrusion (4-2-7) is embedded in the second inner recess (4-2-6), and the second sensor senses the second protrusion (4-2-7).

5. A checking fixture for motor cooling oil pipe according to claim 4, characterized in that: The small hole detection assembly (5) comprises seven groups of small hole detection devices (5-1), which respectively correspond to the seven injection small holes (1-2) of the cooling oil pipe (1); Each group of small hole detection devices (5-1) comprises a third fixing seat (5-1-1) and a third inspection pin (5-1-2). The third fixing seat (5-1-1) is arranged on the bottom plate (6). The top of the third inspection pin (5-1-2) passes through the third fixing seat (5-1-1) and is connected to the third handle portion (5-1-3). The third inspection pin (5-1-2) between the third handle portion (5-1-3) and the third fixing seat (5-1-1) is provided with a third protrusion (5-1-4). The third fixing seat (5-1-1) is also provided with a third limit pin (5-1-2). The third limit block (5-1-5) is provided with a third inner recess (5-1-6) on one side of the third limit block (5-1-5) facing the third inspection pin (5-1-2), and the third inner recess (5-1-6) is provided with a third sensor (5-1-7). When the third inspection pin (5-1-2) is embedded in the corresponding injection hole (1-2), the third handle (5-1-3) is rotated to make the third protrusion (5-1-4) embedded in the third inner recess (5-1-6), and the third sensor (5-1-7) senses the third protrusion (5-1-4).

6. A checking fixture for motor cooling oil pipe according to claim 5, characterized in that: A through hole (6-1) is provided on the bottom plate (6); The first sensor (4-1-10), the second sensor and the third sensor (5-1-7) are connected to the control mechanism.

7. A checking fixture for a motor cooling oil pipe according to any one of claims 3 to 6, characterized in that: The moving rod (3-4) moves with the pressing block (3-2) along the axis direction of the positioning protrusion (2-1-2).

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