Motor housing coaxiality detection device

Abstract

The utility model discloses a motor casing coaxial degree detection device is set up on the upper surface of base and places the groove, and the slider is in the translation of placing groove, and the reference motor casing is placed in the placing groove with the bottom surface in the upper, and the top surface is in the lower, and the slider is combined to the positioning side of reference motor casing and placing groove, and the reference coaxial line position is obtained, and the detection sleeve is the hollow sleeve rod structure, and the vertical through -hole is set up on the top plate, and the through -hole diameter is matched with the outer diameter of detection sleeve, and the inside diameter of detection sleeve is greater than the outer diameter of reference motor casing mandrel, and the top plate is relatively arranged to the bottom, and the both are connected through the guide mechanism, and the top plate is vertically moved along the guide mechanism relative to the bottom, and the through -hole center axis is coaxial with the reference coaxial line position, and the motor casing is placed in the placing groove with the bottom surface in the upper, and the top surface is in the lower, and the slider is combined to the one side of motor casing and placing groove, and the detection sleeve is set down to the through -hole, and the detection sleeve is smoothly set in the motor casing mandrel, and the same axial degree detection requirement is met, and the quick detection is carried out.

Description

Technical Field

[0001] This application relates to a motor housing testing device, and in particular a motor housing coaxiality testing device. Background Technology

[0002] The core function of the battery cooling system in new energy vehicles is to ensure that the battery pack operates within a suitable temperature range in order to balance performance, range and safety. DC brushless motor centrifugal pumps, with their higher power density and lower noise, are suitable for cooling systems of hybrid and electric vehicles.

[0003] These types of water pump motor housings undergo multiple deep-drawing processes, which are complex and result in instability during production, leading to dimensional deviations. Furthermore, because the product is made of stainless steel, the internal spindle is connected to the housing via riveting. (See attached image) Figure 1 As shown in the figure, springback may occur during the riveting process, resulting in non-compliance of coaxiality and a low product qualification rate after pressing. Therefore, online full inspection of the product is required, usually using coordinate measuring machine (CMM). In order to avoid being limited by this, a new inspection device needs to be developed. Summary of the Invention

[0004] Purpose of this utility model: The purpose of this application is to provide a coaxiality detection device for motor housing to detect whether there is a dimensional deviation in the coaxiality after the mandrel is riveted.

[0005] Technical Solution: A coaxiality detection device for a motor housing includes a base, a top plate, a guide mechanism, a detection sleeve, and a slider. A placement groove is formed on the upper surface of the base. The slider moves within the placement groove. A reference motor housing is placed in the placement groove with its bottom surface up and top surface down. Moving the slider causes the reference motor housing to abut against the positioning side of the placement groove, thus obtaining the reference coaxial line position. The detection sleeve is a hollow sleeve structure. A vertical through hole is formed on the top plate. The diameter of the through hole matches the outer diameter of the detection sleeve, and the inner diameter of the detection sleeve is larger than the outer diameter of the reference motor housing spindle. The top plate and the base are arranged vertically opposite each other and connected by the guide mechanism. The top plate moves vertically relative to the base along the guide mechanism, and the central axis of the through hole is coaxial with the reference coaxial line position.

[0006] The motor housing to be tested is placed in the placement groove with the bottom surface facing up and the top surface facing down. The slider is moved to make the motor housing to be tested abut against one side of the placement groove. The detection sleeve is inserted through the through hole and faces downward. If the detection sleeve is smoothly fitted onto the spindle of the motor housing to be tested, it meets the coaxiality detection requirements.

[0007] Ideally, the inner diameter of the testing sleeve is the sum of the outer diameter of the reference motor housing spindle and its tolerance deviation. The inner diameter of the testing sleeve is designed and correlated with the usage method and testing effect of the testing device.

[0008] Furthermore, it also includes an auxiliary block, which matches the shape of the step on the bottom surface of the reference motor housing. The auxiliary block is installed on the lower surface of the top plate, and an extension hole corresponding to the through hole is opened on the auxiliary block. The top plate moves down along the guide mechanism, and the auxiliary block is repositioned with the step on the bottom surface of the motor housing to be tested. Then, the detection sleeve is inserted through the through hole with the extension hole facing downward. The detection sleeve is smoothly fitted onto the mandrel of the motor housing to be tested, which meets the coaxiality detection requirements.

[0009] Furthermore, the slider is connected to a pull rod that passes through the base, and pulling the pull rod causes the slider to move horizontally within the placement groove.

[0010] Furthermore, a guide is connected between the slider and the non-positioning side of the placement slot, which helps to keep the slider moving multiple times with reference to the translation standard under the motor housing, maintain the consistency of the motor housing under test after it is placed in, and reduce detection errors.

[0011] Ideally, the guide is a rigid column, with one end fixed to the non-positioning side of the placement groove and the other end extending into the slider for sliding connection.

[0012] Ideally, a spring is fitted onto the guide member, with one end fixed to the non-positioning side of the placement groove and the other end fixed to the slider. When the slider abuts against the wall of the motor housing, the spring force helps to prevent the motor housing from rotating or moving during fixation.

[0013] Furthermore, both the slider and the positioning side of the placement slot are V-shaped surfaces. The V-shaped surfaces effectively abut and fix the motor housing to the cylindrical wall surface, preventing the motor housing from rotating or moving.

[0014] Furthermore, the guiding mechanism includes a guide post and a guide sleeve. The guide post is mounted on the base, and the guide sleeve is mounted on the top plate. The guide sleeve is fitted onto the guide post for connection. The guiding mechanism is positioned at each of the four corners between the top plate and the base. The guiding mechanism vertically positions the top plate and the base, ensuring the stability and parallelism of the top plate's vertical movement relative to the base through the guiding mechanism, and maintaining the coaxiality of the through-hole's central axis with the reference coaxial line.

[0015] Beneficial effects: The motor housing coaxiality detection device of this application ensures the coaxiality reference between the spindle and the motor housing through the detection device, thereby detecting whether the product meets the coaxiality detection requirements. It can be used repeatedly to quickly detect the product, and the operation is fast, meeting the production pressure of online full detection of products. The top plate can be replaced to adapt to different motor housing detection, and it has a certain degree of versatility. Attached Figure Description

[0016] Figure 1A schematic diagram of the motor housing structure for riveting the mandrel;

[0017] Figure 2 This is a schematic diagram of the detection device structure in this application;

[0018] Figure 3 This is a schematic diagram of the base structure;

[0019] Figure 4 This is a schematic diagram of the top slab structure;

[0020] Figure 5 A schematic diagram showing the motor housing placed inside the base;

[0021] Figure 6 This is a diagram showing the usage status of the testing device in this application. Detailed Implementation

[0022] The present application will be further explained below with reference to the accompanying drawings and specific embodiments.

[0023] A device for detecting the coaxiality of a motor housing, as shown in the attached figure. Figures 2-4 As shown, it includes a base 1, a top plate 2, a guide mechanism 3, a detection sleeve 4, a slider 5, and an auxiliary block 6.

[0024] The base 1 is flat, with a recessed placement groove 11 on its upper surface. The slider 5 is located in the placement groove 11. A horizontally extending pull rod 51 is provided inside the base 1. The inner end of the pull rod 51 is connected to the slider 5, and the outer end of the pull rod 51 extends out of the base 1. Pulling the pull rod 51 causes the slider 5 to move horizontally within the placement groove 11. A space for the motor housing is formed between the non-connecting side of the slider 5 and one side of the placement groove 11. The side of the placement groove 11 facing the non-connecting side of the slider 5 is the positioning side of the placement groove 11, and the side of the placement groove 11 facing the connecting side of the slider 5 is the non-positioning side of the placement groove 11.

[0025] Combined with appendix Figure 5 As shown, the reference motor housing is first placed between the non-connecting side of the slider 5 and the positioning side of the placement groove 11. The reference motor housing is placed with its bottom surface up and its top surface down. The slider 5 is moved to abut against the positioning side of the placement groove 11 and the reference motor housing is fixed. The position of the reference coaxial line is then obtained through the position of the reference motor housing at this time.

[0026] The non-connecting side of slider 5 and the positioning side of placement groove 11 are both designed with V-shaped surfaces to effectively fix the cylindrical motor housing. The V-shaped surface abuts against the cylindrical wall to prevent the motor housing from rotating or moving. A guide member 12 is provided between the connecting side of slider 5 and the non-positioning side of placement groove 11. This helps to keep slider 5 moving multiple times with reference to the translation standard under the motor housing, maintaining the consistency of the fixed position of the motor housing after placement and reducing detection errors. For this purpose, the guide member 12 is preferably a rigid component, such as a cylinder. One end is fixed to the non-positioning side of placement groove 11, and the other end extends into the guide groove opened in slider 5 to form a sliding connection. Alternatively, a spring can be fitted on the cylinder, with one end fixed to the non-positioning side of placement groove 11 and the other end fixed to the side of slider 5. When slider 5 abuts against the wall of motor housing, the spring force helps to prevent the motor housing from rotating or moving during fixation.

[0027] The top plate 2 is flat, with a vertical through hole 21 for the detection sleeve 4 to pass through. The detection sleeve 4 is a hollow sleeve structure, and its outer diameter matches the diameter of the through hole 21, allowing it to be inserted and removed. The inner diameter of the detection sleeve 4 is larger than the outer diameter of the reference motor housing spindle; the inner diameter of the detection sleeve 4 can be designed as the sum of the outer diameter of the reference motor housing spindle and its tolerance deviation. The auxiliary block 6 matches the step shape on the bottom surface of the reference motor housing. The auxiliary block 6 is installed on the lower surface of the top plate 2 corresponding to the position of the through hole 21. The auxiliary block 6 has a through hole corresponding to the through hole 21 as an extension hole for the detection sleeve 4 to pass through. The diameter of the extension hole on the auxiliary block 6 can be the same as or larger than the diameter of the through hole 21.

[0028] The top plate 2 and the base 1 are arranged vertically opposite each other and connected by a guide mechanism 3. The guide mechanism 3 ensures that the central axis of the through hole 21 is coaxial with the reference coaxial line. The guide mechanism 3 vertically positions the top plate 2 and the base 1, maintaining the coaxiality of the central axis of the through hole 21 with the reference coaxial line. The guide mechanism 3 includes a guide post 31 and a guide sleeve 32. The guide post 31 is mounted on the base 1, and the guide sleeve 32 is mounted on the top plate 2. The guide sleeve 32 is fitted onto the guide post 31. A guide mechanism 3 is provided at each of the four corners between the top plate 2 and the base 1 to ensure the stability and parallelism of the vertical movement of the top plate 2 relative to the base 1 via the guide mechanism 3, and to maintain the coaxiality of the central axis of the through hole 21 with the reference coaxial line.

[0029] Combined with appendix Figure 6As shown, during testing, pull outwards slider 5 to place the motor housing under test in the placement groove 11 with the bottom surface up and the top surface down, just like the reference motor housing. Move slider 5 inwards to fix the motor housing under test against the positioning side of the placement groove 11. Move top plate 2 downwards along guide mechanism 3, and first reposition it with the step on the bottom surface of the motor housing under test through auxiliary block 6. Then, both the top and bottom ends of the motor housing are positioned. After top plate 2 abuts against the bottom surface of the motor housing under test, insert test sleeve 4 through through hole 21 with extension hole downwards. The test sleeve 4 is designed to fit smoothly onto the mandrel of the motor housing under test, especially to fit smoothly onto all the mandrels inside the motor housing under test. The product is considered to meet the coaxiality test requirements. The inner diameter of test sleeve 4 is designed according to the usage method and test effect of the testing device and is related to it. After the test is completed, lift top plate 2, pull slider 5, and replace the motor housing under test.

[0030] This application uses a testing device to ensure the coaxiality benchmark between the mandrel and the motor housing, thereby detecting whether the product meets the coaxiality testing requirements. It can be used repeatedly for rapid product testing, is quick to operate, meets the production pressure of online full testing of products, and the top plate can be replaced to adapt to different motor housings for testing, thus having a certain degree of versatility.

Claims

1. A device for detecting the coaxiality of a motor housing, characterized in that: The system includes a base (1), a top plate (2), a guide mechanism (3), a detection sleeve (4), and a slider (5). A placement groove (11) is opened on the upper surface of the base (1). The slider (5) moves within the placement groove (11). The reference motor housing is placed in the placement groove (11) with its bottom surface on top and its top surface on the bottom. The slider (5) is moved to abut against the positioning side of the reference motor housing and the placement groove (11) to obtain the reference coaxial line position. The detection sleeve (4) is a hollow sleeve structure. A vertical through hole (21) is opened on the top plate (2). The diameter of the through hole (21) matches the outer diameter of the detection sleeve (4). The inner diameter of the detection sleeve (4) is larger than the outer diameter of the reference motor housing spindle. The top plate (2) and the base (1) are arranged vertically opposite each other and are connected by the guide mechanism (3). The top plate (2) moves vertically relative to the base (1) along the guide mechanism (3). The central axis of the through hole (21) is coaxial with the reference coaxial line position. The motor housing to be tested is placed in the placement groove (11) with the bottom surface on top and the top surface on the bottom. The slider (5) is moved to make the motor housing to be tested abut against one side of the placement groove (11). The detection sleeve (4) is inserted through the through hole (21) downwards. The detection sleeve (4) is smoothly fitted onto the spindle of the motor housing to be tested, which meets the coaxiality detection requirements.

2. The motor housing coaxiality detection device according to claim 1, characterized in that: The inner diameter of the test sleeve (4) is the sum of the outer diameter of the reference motor housing spindle and its tolerance deviation.

3. The motor housing coaxiality detection device according to claim 1, characterized in that: It also includes an auxiliary block (6), which matches the shape of the step on the bottom surface of the reference motor housing. The auxiliary block (6) is installed on the lower surface of the top plate (2). The auxiliary block (6) has an extension hole corresponding to the through hole (21). The top plate (2) moves down along the guide mechanism (3). The auxiliary block (6) is repositioned with the step on the bottom surface of the motor housing to be tested. Then the detection sleeve (4) is inserted through the through hole (21) with the extension hole facing downward. The detection sleeve (4) is smoothly fitted onto the mandrel of the motor housing to be tested, which meets the coaxiality detection requirements.

4. The motor housing coaxiality detection device according to claim 1, characterized in that: The slider (5) is connected to the pull rod (51) that passes through the base (1).

5. The motor housing coaxiality detection device according to claim 1, characterized in that: A guide (12) is also connected between the slider (5) and the non-positioning side of the placement groove (11).

6. The motor housing coaxiality detection device according to claim 5, characterized in that: The guide (12) is a rigid column, one end of which is fixed to the non-positioning side of the placement groove (11), and the other end extends into the slider (5) for sliding connection.

7. The motor housing coaxiality detection device according to claim 6, characterized in that: A spring is fitted on the guide member (12), one end of which is fixed to the non-positioning side of the placement groove (11), and the other end is fixed to the slider (5).

8. The motor housing coaxiality detection device according to claim 1, characterized in that: Both the slider (5) and the placement groove (11) have V-shaped surfaces on their positioning sides.

9. The motor housing coaxiality detection device according to claim 1, characterized in that: The guiding mechanism (3) includes a guide post (31) and a guide sleeve (32). The guide post (31) is installed on the base (1), and the guide sleeve (32) is installed on the top plate (2). The guide sleeve (32) is sleeved on the guide post (31) for connection. The guiding mechanism (3) is provided at the four corners between the top plate (2) and the base (1).

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