Stator shrinkage fit tool with guide mandrel

Abstract

The utility model discloses a stator shrinkage fit tool with a guide mandrel. The stator shrinkage fit tool comprises a stator; the cylinder body is matched with the stator and is provided with a matching hole for accommodating the stator; the pneumatic clamping jaw is used for clamping the stator; the guide core shaft is arranged on the lower end face of the pneumatic clamping jaw, the guide core shaft comprises a centering core shaft located at one end of the guide core shaft, the centering core shaft and the matching hole of the cylinder body are coaxially arranged, and the centering core shaft is used for positioning the guide core shaft; and the guide part is used for guiding the stator to move. And after the shrinkage fit is completed, the cylinder body is withdrawn. According to the utility model, the guide mandrel is arranged, and the pneumatic clamping jaw, the positioning step surface and other structures are combined, so that accurate, reliable and efficient shrinkage fit assembly between the stator and the cylinder body is realized, and the problems of stator inclination, cylinder body damage, low assembly efficiency and the like in the prior art are solved.

Description

Technical Field

[0001] The utility model relates to a new energy electric vehicle air-conditioning compressor, in particular to a stator shrink-fit tooling with a guide core shaft. Background Art

[0002] With the increasing awareness of environmental protection and the electrification trend of the automotive industry, new energy electric vehicles are gradually becoming an important part of future transportation. As a key component of electric vehicles, the performance and efficiency of electric air-conditioning systems directly affect the driving experience and driving range. As the core component of electric air-conditioning systems, the quality of the production and manufacturing process of electric scroll compressors directly determines the performance, reliability and cost of the products.

[0003] The electric scroll compressor is mainly composed of stator, rotor, scroll plate, controller and cylinder. Among them, the thermal assembly of stator and cylinder is a key link in the production process. This link requires the stator to be accurately assembled into the cylinder hole after heating and expansion to form the working cavity of the compressor.

[0004] However, the existing thermal assembly process of the stator and the cylinder has some defects that are difficult to overcome. The traditional assembly method usually uses a pneumatic three-jaw chuck to clamp the stator and then place it under the heated cylinder. After the cylinder hole expands due to heat, the jaws are released and the stator falls into the cylinder hole under the action of gravity or is directly pressed into the cylinder. This method seems simple, but it faces many challenges in actual operation.

[0005] The stator is difficult to position and prone to tilting: Due to the lack of effective guidance and restraint mechanisms, the stator is prone to tilting during the falling process, resulting in failure to accurately fall into the cylinder hole, or even stuck inside the cylinder, causing assembly failure. At the same time, the stator also presses and cuts the cylinder when it falls, generating aluminum chips and affecting the internal cleanliness.

[0006] Easy to damage the cylinder body and affect the product yield: The inclination of the stator may cause it to collide or rub against the inner wall of the cylinder body, causing scratches, deformation and other damages on the surface of the cylinder body, seriously affecting the sealing performance and service life of the compressor, and ultimately leading to a decrease in product yield and increased production costs.

[0007] Low operating efficiency and difficulty in achieving automation: The traditional assembly method requires manual repeated adjustment of the stator position, which is cumbersome and inefficient, and difficult to achieve automated production, limiting the improvement of production efficiency.

[0008] In order to overcome the above problems, some improved solutions try to use complex positioning fixtures or visual recognition systems to assist in positioning, but these solutions are often complex in structure, expensive, and the operation is still cumbersome, which makes it difficult to meet the needs of large-scale production. Therefore, developing a new stator shrink-fit tooling with simple structure, convenient operation, low cost and effective improvement of assembly accuracy and efficiency has become a technical problem that needs to be solved in the field of electric scroll compressor manufacturing. Utility Model Content

[0009] The utility model aims to provide a stator shrink-fit tool with a guide core shaft which is easier to position the stator.

[0010] The utility model solves the above technical problems through the following technical solutions:

[0011] A stator shrink-fit tool with a guide mandrel, comprising: a stator; a cylinder body matched with the stator, the cylinder body having a matching hole for accommodating the stator; a pneumatic clamp for clamping the stator; a guide mandrel, the guide mandrel is arranged on the lower end surface of the pneumatic clamp, and the guide mandrel comprises: a centering mandrel located at one end of the guide mandrel, the centering mandrel is coaxially arranged with the matching hole of the cylinder body, and is used to position the guide mandrel; and a guide part for guiding the movement of the stator.

[0012] Preferably, the cylinder body is provided with a bearing hole concentric with the aperture of the matching hole, and the centering mandrel can extend into the bearing hole. Through this design, the concentricity of the guide mandrel and the cylinder body can be further ensured, the assembly accuracy can be improved, and the assembly problem caused by the stator tilting can be effectively avoided.

[0013] Preferably, when one end surface of the stator contacts the positioning step surface on the cylinder body, the stator is restricted from displacement. This design can restrict the movement of the stator in the axial direction, avoid the problem of the stator being assembled too deep or too shallow, ensure the reliability of assembly, and improve the yield rate of the product.

[0014] Preferably, the diameter of the centering mandrel is smaller than the diameter of the guide portion. This design allows the guide mandrel to be sleeved on the outside of the centering mandrel and the bearing hole is used to limit the guide mandrel, which simplifies the structure, facilitates assembly, and also reduces manufacturing costs.

[0015] Preferably, the pneumatic clamp comprises: at least three evenly distributed clamping jaws, the clamping jaws are arranged in linkage to clamp the stator; and a cylinder driving the linkage of the clamping jaws.

[0016] This design enables the pneumatic clamp to stably clamp the stator, and drives the clamping jaws to work in conjunction with the cylinder to achieve the clamping and release of the stator.

[0017] Preferably, the pneumatic clamp is arranged above the guide mandrel and fixed to the guide mandrel. This design ensures that the pneumatic clamp can effectively clamp and release the stator during the assembly process, and cooperate with the guide mandrel to complete the precise positioning of the stator.

[0018] Preferably, the stator sleeve is outside the guide part of the guide core shaft, and the stator can slide up and down outside the guide part. This design ensures that the stator is always guided by the guide core shaft during the assembly process, avoids collision and friction, and improves assembly accuracy and efficiency.

[0019] In summary, the utility model realizes accurate, reliable and efficient shrink fit assembly between the stator and the cylinder body by setting a guide core shaft and combining structures such as pneumatic clamps and positioning step surfaces, thereby solving the problems of stator tilt, cylinder body damage, and low assembly efficiency existing in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 , which is a schematic diagram of the side structure of the stator of one embodiment of the utility model.

[0021] Figure 2 , which is a schematic diagram of the top view structure of the stator of one embodiment of the utility model.

[0022] Figure 3 , which is a schematic structural diagram of a stator shrink-fit tooling with a guide core shaft according to an embodiment of the utility model.

[0023] Figure 4 , which is a schematic structural diagram of a guide mandrel and a pneumatic clamp according to an embodiment of the utility model.

[0024] Figure 5 , which is a schematic side sectional structural diagram of a guide mandrel and a pneumatic clamp according to an embodiment of the utility model.

[0025] Figure 6 , which is a schematic diagram of the top view of the pneumatic clamping jaws according to one embodiment of the utility model.

[0026] Figure 7 , which is a schematic structural diagram of a cylinder body and a stator when assembled according to an embodiment of the present invention. DETAILED DESCRIPTION

[0027] The stator shrink-fit tooling with a guide mandrel of the utility model is further described in detail below with reference to the accompanying drawings.

[0028] Figure 3 , is a schematic structural diagram of a stator shrink-fit tooling with a guide mandrel according to an embodiment of the present invention. Figure 3As shown, the utility model provides a stator shrink-fit tooling with a guide mandrel, which includes: a stator 1, a cylinder body 2, a pneumatic clamp 3 and a guide mandrel 4.

[0029] Figure 1 This is a side view structural diagram of a stator according to an embodiment of the utility model. Figure 2 FIG. 1 is a schematic diagram of a top view of a stator according to an embodiment of the present invention. Figure 1 , 2 As shown, the stator 1 is an important component of the electric scroll compressor, and its appearance is usually annular, and has a matching outer diameter with the cylinder body 2.

[0030] like Figure 3 As shown, the cylinder body 2 is another important component of the electric scroll compressor, and is provided with a matching hole 201 for accommodating the stator 1. The inner diameter of the matching hole 201 is slightly smaller than the outer diameter of the stator 1, so as to form an interference fit during the shrink fitting process.

[0031] Figure 4 This is a schematic structural diagram of a guide mandrel and a pneumatic clamp according to an embodiment of the utility model. Figure 5 This is a schematic side cross-sectional view of a guide mandrel and a pneumatic clamp according to an embodiment of the utility model. Figure 6 FIG. 1 is a schematic diagram of a top view of a pneumatic clamp according to an embodiment of the present invention. Figure 3-6 As shown, the pneumatic clamp 3 is used to clamp the stator 1 and position it above the guide core shaft 4. The pneumatic clamp 3 includes at least three evenly distributed claws 301, which are arranged in linkage and can be opened and closed under the drive of the cylinder 302. When the cylinder 302 is inflated, the claws 301 are opened to clamp the stator 1; when the cylinder 302 is de-aired, the claws 301 are closed to release the stator 1.

[0032] Guide mandrel 4: The guide mandrel 4 is arranged on the lower end surface of the pneumatic clamp 3, such as Figure 3 As shown, the stator 1 extends into the interior of the cylinder 2 to guide the stator 1 to accurately fall into the matching hole 201 of the cylinder 2. Figure 4 and Figure 5 As shown, the guide mandrel 4 includes a centering mandrel 401 located at one end thereof and a guide portion 402 for guiding the movement of the stator 1 .

[0033] Centering mandrel 401: The centering mandrel 401 is coaxially arranged with the matching hole 201 of the cylinder body 2, and its outer cylindrical surface is coaxial with the inner cylindrical surface of the matching hole 201, which is used to accurately position the guide mandrel 4 to ensure that the stator 1 is always concentric with the cylinder body 2 during the shrink-fit process. In order to further improve the positioning accuracy, preferably, a bearing hole 202 concentric with the aperture of the matching hole 201 is provided on the cylinder body 2, and the centering mandrel 401 can extend into the bearing hole 202, and realizes its own precise positioning by cooperating with the bearing hole 202, such as Figure 3 In other embodiments, when the bearing hole 202 is not provided, a process positioning hole can be provided on the positioning tool of the cylinder body 2 .

[0034] Guide part 402: The guide part 402 is sleeved on the outside of the centering core shaft 401, and its inner hole is larger than the outer diameter of the stator 1, and its axis coincides with the axis of the centering core shaft 401. The stator 1 is sleeved on the outside of the guide part 402 and can slide up and down on the outside of the guide part 402.

[0035] In order to limit the falling depth of the stator 1 in the cylinder 2, preferably, a positioning step surface 203 is provided on the inner wall of the matching hole 201 of the cylinder 2. Figure 2 When the stator 1 falls to the positioning step surface 203 , one end surface of the stator 1 contacts the positioning step surface 203 , thereby limiting the further falling of the stator 1 .

[0036] In order to facilitate the assembly and disassembly of the guide mandrel 4, preferably, the diameter of the centering mandrel 401 is smaller than the diameter of the guide portion 402. Figure 4 shown.

[0037] In order to ensure that the pneumatic clamp 3 can reliably clamp and release the stator 1, preferably, the pneumatic clamp 3 is arranged above the guide mandrel 4 and is fixedly connected to the guide mandrel 4, such as Figure 6 and Figure 7 shown.

[0038] The working principle of the utility model is as follows:

[0039] The stator 1 is placed between the clamping jaws 301 of the pneumatic clamp 3 , and the air cylinder 302 is started to open the clamping jaws 301 to clamp the stator 1 .

[0040] The cylinder body 2 is heated to expand the inner diameter of the matching hole 201 thereof to be slightly larger than the outer diameter of the stator 1 .

[0041] The pneumatic clamping jaws 3 are moved downward together with the stator 1 , so that the stator 1 is inserted into the guide portion 402 of the guide core shaft 4 .

[0042] The pneumatic clamping jaw 3 continues to move downward until the centering mandrel 401 is inserted into the bearing hole 202 of the cylinder body 2, and the guide mandrel 4 is precisely positioned.

[0043] The cylinder 302 is activated to close the claw 301 and release the stator 1 .

[0044] Figure 7 , is a schematic diagram of the structure of the cylinder body and the stator when assembled according to one embodiment of the utility model. Figure 7 As shown, under the action of gravity, the stator 1 slides down along the guide portion 402 until its end surface contacts the positioning step surface 203 of the cylinder body 2.

[0045] After the cylinder body 2 is cooled, the stator 1 and the cylinder body 2 form an interference fit, and the assembly is completed.

[0046] Beneficial effects of the utility model:

[0047] Improved assembly accuracy: Due to the guiding and positioning function of the guide mandrel 4, the stator 1 is always concentric with the cylinder body 2 during the shrink-fit process, avoiding tilting, thereby improving assembly accuracy.

[0048] Avoiding damage to the cylinder body: The stator 1 falls smoothly into the matching hole 201 of the cylinder body 2 under the guidance of the guide core shaft 4, avoiding collision or friction with the inner wall of the cylinder body 2, effectively protecting the cylinder body 2 and reducing the defect rate of the product. Due to good centering, the heating temperature can also be reduced, reducing the deformation of the cylinder body due to heat, reducing power consumption, and achieving energy saving.

[0049] Improved production efficiency: The utility model has a simple structure and is easy to operate, can significantly improve the shrink-fit assembly efficiency between the stator 1 and the cylinder body 2, and is suitable for large-scale production.

[0050] In summary, the utility model provides a stator shrink-fit tooling with a guide mandrel that is simple in structure, easy to operate, and low in cost, which can effectively solve the problems of stator tilt, cylinder damage, and low assembly efficiency in the prior art, and save energy and reduce consumption, with significant technical progress and economic benefits. The above content is only a preferred embodiment of the utility model and cannot limit the scope of implementation of the utility model, that is, all equal changes and modifications made within the scope defined by the claims of the utility model should still fall within the protection scope of the utility model.

Claims

1. A stator shrink-fit tooling with a guide mandrel, characterized in that: include: stator; A cylinder body matched with the stator, the cylinder body having a matching hole for accommodating the stator; A pneumatic clamping jaw, used for clamping the stator; A guide mandrel, the guide mandrel being arranged on the lower end surface of the pneumatic clamping jaw, and the guide mandrel comprising: A centering mandrel located at one end of the guide mandrel, the centering mandrel being coaxially arranged with the matching hole of the cylinder body and being used for positioning the guide mandrel; A guide portion is used to guide the movement of the stator.

2. The stator shrink-fit tooling with a guide mandrel according to claim 1, characterized in that: The cylinder body is provided with a bearing hole which is concentric with the hole diameter of the matching hole, and the centering mandrel can extend into the bearing hole.

3. The stator shrink-fit tooling with a guide mandrel according to claim 2, characterized in that: When one end surface of the stator contacts the positioning step surface on the cylinder body, the stator is restricted from displacement.

4. The stator shrink-fit tooling with a guide mandrel according to claim 3, characterized in that: The diameter of the centering mandrel is smaller than the diameter of the guide portion.

5. The stator shrink-fit tooling with a guide mandrel according to claim 4, characterized in that: The pneumatic gripper comprises: At least three evenly distributed claws, the claws are arranged in linkage to clamp the stator; A cylinder driving the claw linkage.

6. The stator shrink-fit tooling with a guide mandrel according to claim 5, characterized in that: The pneumatic clamp is arranged above the guide core shaft and is fixed to the guide core shaft.

7. The stator shrink-fit tooling with a guide mandrel according to claim 6, characterized in that: The stator sleeve is arranged outside the guide part of the guide core shaft, and the stator can slide up and down outside the guide part.

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