Plug gauge tool

Abstract

The utility model provides a plug gauge tool which can be arranged in an inner circle of a stator, the plug gauge tool comprises a first tool split body, a second tool split body and a locking part, the first tool split body and the second tool split body are assembled and spliced to form a tool part, and the locking part is assembled in the tool part; the locking part has a locking state, and when the locking part is in the locking state, the locking part exerts force outwards on the tool part in the radial direction of the stator so that the tool part can abut against and be supported on the inner circumferential face of the stator. According to the utility model, in the process from sleeving the hot jacket shell on the stator to cooling, the plug gauge tool always supports the stator from the inside, so that the extrusion of the shell on the stator can be reduced, the deformation degree of an air gap between the stator and the rotor can be reduced, and finally, the motor efficiency, the torque ripple, the electromagnetic noise and the like are obviously improved.

Description

Technical Field

[0001] This utility model belongs to the field of motor assembly technology, specifically relating to a plug gauge tooling. Background Technology

[0002] Currently, the mainstream method for fixing the motor stator during compressor assembly is still the stator heat-shrink casing. This method relies on the interference fit between the casing and the motor stator, combined with the thermal expansion and contraction of the metal casing, to achieve fixation between the casing and the motor stator. However, this method causes the casing to compress the stator, resulting in irregular deformation of the stator. This leads to uneven air gap between the stator and rotor, ultimately negatively impacting motor efficiency, torque fluctuation, electromagnetic noise, and other performance indicators. Utility Model Content

[0003] Therefore, this utility model provides a plug gauge tooling that can solve the technical problem that when fixing the motor stator during compressor assembly, the method of using a stator heat-shrink housing will cause irregular deformation of the stator, which in turn leads to uneven air gap between the stator and rotor, and ultimately has a negative impact on motor efficiency, torque fluctuation, electromagnetic noise and other indicators.

[0004] To address the aforementioned problems, this utility model provides a plug gauge fixture that can be placed within the inner circle of a stator. The plug gauge fixture includes a first fixture component, a second fixture component, and a locking component. The first fixture component and the second fixture component are assembled to form a fixture component, and the locking component is assembled within the fixture component. The locking component has a locked state. When the locking component is in the locked state, the locking component applies a radial outward force to the fixture component along the stator to cause the fixture component to abut against and be supported against the inner circumferential surface of the stator.

[0005] In some embodiments, the locking component also has an unlocked state, in which the locking component releases the radially outward force applied to the tooling component.

[0006] In some embodiments, the first tooling component has a first assembly surface and a first snap-fit ​​portion, with a first slot formed between the first assembly surface and the first snap-fit ​​portion; the second tooling component has a second assembly surface and a second snap-fit ​​portion, with a second slot formed between the second assembly surface and the second snap-fit ​​portion; the width of the first snap-fit ​​portion is smaller than the groove width of the second slot, and the width of the second snap-fit ​​portion is smaller than the groove width of the first slot; after the first snap-fit ​​portion is snapped into the second slot and the second snap-fit ​​portion is snapped into the first slot, the first tooling component and the second tooling component are assembled to form the tooling part.

[0007] In some embodiments, the first tooling component has an arc-shaped first outer curved surface with a radius of curvature of R1, the second tooling component has an arc-shaped second outer curved surface with a radius of curvature of R2, the width of the first snap-fit ​​portion is D1, D1 = 0.2R1, the width of the first slot is D2, 0.23R2 < D2 < 0.25R2, the width of the second snap-fit ​​portion is D3, D3 = 0.2R2, and the width of the second slot is D4, 0.23R1 < D4 < 0.25R1.

[0008] In some embodiments, a first groove is formed within the first tooling component. The first groove has a first arc-shaped groove wall extending circumferentially along the first tooling component, with the radius of curvature of the first groove wall gradually decreasing along the circumferential direction of the first tooling component. The locking component has a first locking arm located within the first groove. The free end of the first locking arm forms an arc-shaped first mating surface, the radius of curvature of which is between the minimum and maximum radius of curvature of the first groove wall. A second groove is formed within the second tooling component. The second groove has a second arc-shaped groove wall extending circumferentially along the second tooling component, with the radius of curvature of the second groove wall gradually decreasing along the circumferential direction of the second tooling component. The locking component has a second locking arm located within the second groove. The free end of the second locking arm forms an arc-shaped second mating surface, the radius of curvature of which is between the minimum and maximum radius of curvature of the second groove wall. The locking component switches between the locked state and the unlocked state by rotating relative to the tooling component.

[0009] In some embodiments, the first tooling component has an arc-shaped first outer curved surface with a radius of curvature of R1. After the first locking arm rotates circumferentially along the first groove by an angle a1, the radius of curvature of the first groove wall decreases by K1R1, where 22° < a1 < 30° and 1.2% < K1 ≤ 1.5%. The second tooling component has an arc-shaped second outer curved surface with a radius of curvature of R2. After the second locking arm rotates circumferentially along the second groove by an angle a2, the radius of curvature of the second groove wall decreases by K2R2, where 22° < a2 < 30° and 1.2% < K2 ≤ 1.5%.

[0010] In some embodiments, the central angle corresponding to the first groove wall is b1, 3a1 < b1 < 4a1; the central angle corresponding to the second groove wall is b2, 3a2 < b2 < 4a2.

[0011] In some embodiments, when the locking component is in the locked state, both the first outer curved surface and the second outer curved surface are in contact with the inner circumferential surface of the stator.

[0012] In some embodiments, the locking component further includes an operating shaft on which both the first locking arm and the second locking arm are located, the operating shaft extending axially from the interior to the exterior of the tooling component; and / or, a first stop structure is formed within the first tooling component, which stops the first locking arm as it rotates along the first groove; a second stop structure is formed within the second tooling component, which stops the second locking arm as it rotates along the second groove.

[0013] In some embodiments, an assist wrench is mounted on the operating shaft, and the assist wrench is located outside the tooling component.

[0014] In some embodiments, the operating shaft includes a body and a locking protrusion formed on the body, the power wrench has a slot and a third locking groove communicating with the slot, the body is inserted into the slot, and the locking protrusion engages in the third locking groove.

[0015] In some embodiments, the first tooling component and the second tooling component have the same structure.

[0016] The plug gauge fixture provided by this utility model has the following beneficial effects:

[0017] When the locking component is in the locked state, it applies a radial force outward to the tooling component along the stator, causing the tooling component to abut against and support the inner circumferential surface of the stator. Therefore, during the process of the heat-shrinking housing being fitted onto the stator until cooling, the plug gauge tooling always provides internal support to the stator. This reduces the pressure of the heat-shrinking housing on the stator, thereby reducing the degree of deformation of the air gap between the stator and rotor, and ultimately significantly improving motor efficiency, torque fluctuation, and electromagnetic noise. Attached Figure Description

[0018] To more clearly illustrate the embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0019] Figure 1This is a schematic diagram of the locking component of the plug gauge tooling in an embodiment of the present invention, assembled within the tooling component.

[0020] Figure 2 This is a top view of the tooling components of the plug gauge tooling according to an embodiment of the present utility model;

[0021] Figure 3 This is a schematic diagram of the structure of the first tooling component of the plug gauge tooling according to an embodiment of the present utility model;

[0022] Figure 4 This is a top view of the first tooling component of the plug gauge tooling according to an embodiment of the present utility model;

[0023] Figure 5 This is a top view of the first tooling component of the plug gauge tooling according to an embodiment of the present utility model;

[0024] Figure 6 This is a side view of the tooling components of the plug gauge tooling according to an embodiment of the present utility model;

[0025] Figure 7 A top view of the locking component of the plug gauge tooling according to an embodiment of the present utility model, with the locking component in the unlocked state.

[0026] Figure 8 A cross-sectional view of the locking component of the plug gauge tooling according to an embodiment of the present utility model, with the locking component in the unlocked state;

[0027] Figure 9 A cross-sectional view of the locking component of the plug gauge tooling according to an embodiment of the present utility model, with the locking component assembled inside the tooling component and in a locked state.

[0028] Figure 10 This is a schematic diagram of the locking component of the plug gauge tooling according to an embodiment of the present utility model;

[0029] Figure 11 This is a side view of the locking component of the plug gauge tooling according to an embodiment of the present utility model;

[0030] Figure 12 This is a top view of the locking component of the plug gauge tooling according to an embodiment of the present utility model;

[0031] Figure 13 This is a schematic diagram of the structure of the assist wrench of the plug gauge tooling according to an embodiment of the present utility model;

[0032] Figure 14 This is a bottom view of the power-assisted wrench of the plug gauge tooling according to an embodiment of the present utility model;

[0033] Figure 15 This is a side view of the assisted wrench of the plug gauge tool according to an embodiment of the present utility model.

[0034] The reference numerals in the attached figures are as follows:

[0035] 1. First tooling component; 2. Second tooling component; 3. Locking component; 31. First locking arm; 32. Second locking arm; 33. Operating shaft; 4. First assembly surface; 5. First snap-fit ​​part; 6. Second assembly surface; 7. Second snap-fit ​​part; 8. First outer curved surface; 9. Second outer curved surface; 10. First groove; 11. First mating surface; 12. Second groove; 13. Second mating surface; 14. First stop structure; 15. Second stop structure; 16. Power wrench; 161. Torque part; 162. Sleeve part; 17. Snap protrusion; 18. Slot; 19. Third slot; 20. First clearance groove; 21. Second clearance groove. Detailed Implementation

[0036] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present utility model or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0037] In the description of this utility model, it should be understood that the directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this utility model. The directional terms "inner" and "outer" refer to the inner and outer contours of each component itself.

[0038] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0039] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be construed as limiting the scope of protection of this utility model.

[0040] See also Figures 1 to 15 As shown, according to an embodiment of the present invention, a plug gauge fixture is provided, which can be placed in the inner circle of a stator. The plug gauge fixture includes a first fixture part 1, a second fixture part 2, and a locking component 3. The first fixture part 1 and the second fixture part 2 are assembled to form a fixture component, and the locking component 3 is assembled inside the fixture component. The locking component 3 has a locked state. When the locking component 3 is in the locked state, the locking component 3 applies a force outward along the radial direction of the stator to the fixture component so that the fixture component abuts against and is supported on the inner circumferential surface of the stator.

[0041] In this technical solution, when the locking component 3 is in the locked state, the locking component 3 applies force outward along the radial direction of the stator to the tooling component so that the tooling component abuts and supports against the inner circumferential surface of the stator. Therefore, during the process of the heat-shrinking housing being fitted onto the stator until cooling, the plug gauge tooling always provides support to the stator from the inside. This can reduce the pressure of the heat-shrinking housing on the stator, thereby reducing the degree of deformation of the air gap between the stator and rotor, and ultimately significantly improving indicators such as motor efficiency, torque fluctuation, and electromagnetic noise.

[0042] In one specific implementation, the locking component 3 also has an unlocked state. When the locking component 3 is in the unlocked state, it releases the radially outward force applied to the tooling component. It is understood that after the housing cools and the stator compression stops, the locking component 3 is switched to the unlocked state, and then the plug gauge tooling is removed from the stator.

[0043] See also Figures 1 to 3As shown, the first tooling component 1 has a first assembly surface 4 and a first snap-fit ​​portion 5, and a first snap-fit ​​groove is formed between the first assembly surface 4 and the first snap-fit ​​portion 5; the second tooling component 2 has a second assembly surface 6 and a second snap-fit ​​portion 7, and a second snap-fit ​​groove is formed between the second assembly surface 6 and the second snap-fit ​​portion 7; the width of the first snap-fit ​​portion 5 is smaller than the groove width of the second snap-fit ​​groove, and the width of the second snap-fit ​​portion 7 is smaller than the groove width of the first snap-fit ​​groove. After the first snap-fit ​​portion 5 is snapped into the second snap-fit ​​groove and the second snap-fit ​​portion 7 is snapped into the first snap-fit ​​groove, the first tooling component 1 and the second tooling component 2 are assembled to form a tooling part.

[0044] In this embodiment, by making the width of the first snap-fit ​​portion 5 smaller than the groove width of the second snap-fit ​​slot and the width of the second snap-fit ​​portion 7 smaller than the groove width of the first snap-fit ​​slot, after the first tooling component 1 and the second tooling component 2 are assembled to form a tooling part, since the first snap-fit ​​portion 5 has a clearance allowance in the second snap-fit ​​slot and the second snap-fit ​​portion 7 has a clearance allowance in the first snap-fit ​​slot, the tooling part can be expanded and shrunk.

[0045] See also Figure 2 and Figure 4 As shown, the first tooling component 1 has an arc-shaped first outer curved surface 8 with a radius of curvature of R1. The second tooling component 2 has an arc-shaped second outer curved surface 9 with a radius of curvature of R2. The width of the first snap-fit ​​part 5 is D1, where D1 = 0.2R1. The width of the first slot is D2, where 0.23R2 < D2 < 0.25R2. The width of the second snap-fit ​​part 7 is D3, where D3 = 0.2R2. The width of the second slot is D4, where 0.23R1 < D4 < 0.25R1.

[0046] In this technical solution, when D1 = 0.2R1, 0.23R1 < D4 < 0.25R1, D3 = 0.2R2, 0.23R2 < D2 < 0.25R2, the assembled tooling parts have a certain amount of room for expansion and contraction, and can be easily placed into the stator when shrinking. At the same time, the first snap-fit ​​part 5 and the second snap-fit ​​part 7 have a certain thickness and are not easily deformed.

[0047] See also Figures 7 to 9As shown, a first groove 10 is formed in the first tooling component 1. The first groove 10 has a first groove wall surface that extends circumferentially along the first tooling component 1 and is arc-shaped. Along the circumferential direction of the first tooling component 1, the radius of curvature of the first groove wall surface gradually decreases. The locking component 3 has a first locking arm 31, which is located in the first groove 10. The free end of the first locking arm 31 forms an arc-shaped first mating surface 11. The radius of curvature of the first mating surface 11 is between the minimum radius of curvature and the maximum radius of curvature of the first groove wall surface. A second groove 12 is formed within the second tooling component 2. The second groove 12 has a second groove wall surface that extends circumferentially along the second tooling component 2 and is arc-shaped. The radius of curvature of the second groove wall surface gradually decreases along the circumferential direction of the second tooling component 2. The locking component 3 has a second locking arm 32, which is located within the second groove 12. The free end of the second locking arm 32 forms an arc-shaped second mating surface 13. The radius of curvature of the second mating surface 13 is between the minimum and maximum radius of curvature of the second groove wall surface. The locking component 3 switches between a locked state and an unlocked state by rotating relative to the tooling component.

[0048] In this embodiment, as Figure 8 and Figure 9 As shown, the radii of curvature of both the first and second groove walls gradually decrease in a clockwise direction. Alternatively, they can be designed to decrease gradually in a counter-clockwise direction. When the radii of curvature of both the first and second groove walls decrease clockwise, the circumferential direction refers to the clockwise direction; when the radii of curvature of both the first and second groove walls decrease counter-clockwise, the circumferential direction refers to the counter-clockwise direction. During the circumferential rotation of the locking component 3 along the tooling component, since the radius of curvature of the first mating surface 11 formed by the free end of the first locking arm 31 is between the minimum and maximum radius of curvature of the first groove wall, and the radius of curvature of the second mating surface 13 formed by the free end of the second locking arm 32 is between the minimum and maximum radius of curvature of the second groove wall, the first locking arm 31 will gradually push open the first tooling component 1 and the second locking arm 32 will gradually push open the second tooling component 2, eventually causing the tooling component to be expanded. Then the tooling component abuts against the inner circumferential surface of the stator and supports the stator, and the locking component 3 also switches from the unlocked state to the locked state.

[0049] See Figure 4As shown, the first tooling component 1 has an arc-shaped first outer curved surface 8 with a radius of curvature of R1. After the first locking arm 31 rotates by an angle a1 along the circumference of the first groove 10, the radius of curvature of the first groove wall decreases by K1R1, where 22° < a1 < 30° and 1.2% < K1 ≤ 1.5%. The second tooling component 2 has an arc-shaped second outer curved surface 9 with a radius of curvature of R2. After the second locking arm 32 rotates by an angle a2 along the circumference of the second groove 12, the radius of curvature of the second groove wall decreases by K2R2, where 22° < a2 < 30° and 1.2% < K2 ≤ 1.5%.

[0050] In this technical solution, when the first locking arm 31 rotates by an angle a1 along the circumference of the first groove 10, the radius of curvature of the first groove wall decreases by K1R1, 22° < a1 < 30°, 1.2% < K1 ≤ 1.5%; and when the second locking arm 32 rotates by an angle a2 along the circumference of the second groove 12, the radius of curvature of the second groove wall decreases by K2R2, 22° < a2 < 30°, 1.2% < K2 ≤ 1.5%, then the tooling components can achieve a good supporting effect when cooperating with the locking component 3 during rotation, while also ensuring that the first tooling component 1 and the second tooling component 2 have good mechanical strength and aesthetics. Specifically, as follows... Figure 4 As shown, when the first locking arm 31 rotates along the first groove 10 by the first angle a1, the radius of curvature of the first groove wall changes from R3 to R4. When the first locking arm 31 rotates along the first groove 10 by the second angle a1, the radius of curvature of the first groove wall changes from R4 to R5, satisfying R3=R4+K1R1=R5+2K1R1. When the second locking arm 32 rotates along the second groove 12, the degree of reduction in the radius of curvature of the second groove wall is similar to that of the first groove wall, and will not be elaborated here.

[0051] See Figure 4 As shown, the central angle corresponding to the first groove wall is b1, 3a1 < b1 < 4a1; the central angle corresponding to the second groove wall is b2, 3a2 < b2 < 4a2.

[0052] In this embodiment, when 3a1 < b1 < 4a1 and 3a2 < b2 < 4a2 are satisfied, the tooling components can achieve a better expansion effect when rotating in conjunction with the locking component 3, and the first tooling component 1 and the second tooling component 2 have better mechanical strength and aesthetics.

[0053] Figure 8The diagram shows the assembly of the first tooling component 1 and the second tooling component 2 to form a tooling part, with the locking component 3 assembled inside the tooling part and in the unlocked state. The dashed outer circle in the diagram represents the inner circumference of the stator, and the dashed inner circle represents the outer contours of the first locking arm 31 and the second locking arm 32. When the locking component 3 is in the unlocked state, the tooling part is not expanded, so the dashed outer circle surrounds the periphery of the tooling part. Figure 9 The diagram shows the locking component 3 in the locked state. In this diagram, the tooling component is expanded, and the outer contour of the tooling component is... Figure 8 The dotted outer circle in the middle coincides with the center, thus providing internal support for the stator.

[0054] In one specific implementation, when the locking component 3 is in the locked state, the first outer curved surface 8 and the second outer curved surface 9 are both in contact with the inner circumferential surface of the stator. This makes the force uniform throughout the stator, and the degree of extrusion deformation of the stator by the heat-shrinkable shell is less.

[0055] See Figure 1 As shown, the locking component 3 also has an operating shaft 33, on which the first locking arm 31 and the second locking arm 32 are both located. The operating shaft 33 extends from the inside of the tooling component to the outside of the tooling component along the axial direction of the tooling component.

[0056] In this technical solution, the operating shaft 33 extends from the inside of the tooling component to the outside of the tooling component, which can facilitate the rotation of the entire locking component 3, thereby realizing the switching of the locking component 3 between the locked state and the unlocked state by rotation.

[0057] See also Figures 1 to 3 As shown, the first tooling component 1 has a first clearance groove 20, which communicates with the first recess 10. The second tooling component 2 has a second clearance groove 21, which communicates with the second recess 12. During the assembly of the locking component 3 into the tooling component, the first clearance groove 20 and the second clearance groove 21 are used to avoid the first locking arm 31 and the second locking arm 32, respectively.

[0058] See also Figure 3 , Figure 8 and Figure 9 As shown, a first stop structure 14 is formed in the first tooling component 1. During the rotation of the first locking arm 31 along the first groove 10, the first stop structure 14 is used to stop the first locking arm 31. A second stop structure 15 is formed in the second tooling component 2. During the rotation of the second locking arm 32 along the second groove 12, the second stop structure 15 is used to stop the second locking arm 32.

[0059] In this embodiment, the first stop structure 14 and the second stop structure 15 have an indicative function. When the first locking arm 31 rotates to be stopped by the first stop structure 14 and the second locking arm 32 rotates to be stopped by the second stop structure 15, the first locking arm 31 and the second locking arm 32 can no longer rotate, thereby preventing the locking component 3 from rotating. This indicates that the locking component 3 has switched from the unlocked state to the locked state.

[0060] See also Figures 13 to 15 As shown, an assist wrench 16 is assembled on the operating shaft 33, and the assist wrench 16 is located outside the tooling component. The addition of the assist wrench 16 makes it more convenient and less strenuous to turn the locking component 3.

[0061] See also Figure 1 , Figure 10 , Figure 13 and Figure 14 As shown, the operating shaft 33 includes a main body and a locking protrusion 17 formed on the main body. The power wrench 16 has a slot 18 and a third locking groove 19 communicating with the slot 18. The main body is inserted into the slot 18, and the locking protrusion 17 is engaged in the third locking groove 19.

[0062] In this embodiment, the locking protrusion 17 ensures that when the power-assisted wrench 16 is turned, there will be no relative rotation between the power-assisted wrench 16 and the operating shaft 33, thereby ensuring that the force applied to the power-assisted wrench 16 is fully applied to the rotation of the locking component 3.

[0063] Preferably, the first tooling component 1 and the second tooling component 2 have the same structure, so that only one set of molds is needed to manufacture the first tooling component 1 and the second tooling component 2 during production. Moreover, the identical structure of the first tooling component 1 and the second tooling component 2 can also ensure that the abutting force of the tooling components on the inner circumference of the stator is uniform and consistent.

[0064] It should be noted that when the first tooling component 1 and the second tooling component 2 have the same structure, the first locking arm 31 and the second locking arm 32 of the locking component 3 are also identical. In order to make the opening force applied by the locking component 3 to the first tooling component 1 and the second tooling component 2 more uniform, preferably, there are two first grooves 10, two first stop structures 14, with the two first stop structures 14 located at the ends of the two first grooves 10 respectively, two first clearance grooves 20, with one side of the two first clearance grooves 20 overlapping with one side of the two first stop structures 14 respectively; there are two second grooves 12, two second stop structures 15, with the two second stop structures 15 located at the ends of the two second grooves 12 respectively, and two second clearance grooves 21, with one side of the two second clearance grooves 21 overlapping with one side of the two second stop structures 15 respectively. The number of first locking arms 31 and second locking arms 32 are both two. The two first locking arms 31 and the two second locking arms 32 are evenly distributed along the circumference of the operating shaft 33, that is, the included angle between two adjacent locking arms is a right angle. The number of latching protrusions 17 is four, and the four latching protrusions 17 correspond to the positions of the four locking arms, and the four latching protrusions 17 are located above the four locking arms. Since the four latching protrusions 17 correspond to the positions of the four locking arms, the locking component 3 can be determined to be in the locked or unlocked state by observing the positions of the four latching protrusions 17. The power wrench 16 includes a torque part 161 and a sleeve part 162. The slot 18 and the third slot 19 are both formed in the sleeve part 162. When the number of latching protrusions 17 is four, the number of third slots 19 is also four.

[0065] It should also be noted that the first engaging part 5 and the first slot are located below the first recess 10, and the second engaging part 7 and the second slot are located below the second recess 12. Since the first tooling component 1 and the second tooling component 2 have the same structure, only the first tooling component 1 will be used as an example. Figure 6As shown, the height of the first tooling component 1 is H, the height between the bottom of the first groove 10 and the upper surface of the first tooling component 1 is H1, the height of the first snap-fit ​​part 5 is H3, H = H1 + H3, the height of the first groove 10 is H2, and the height of the first clearance groove 20 is H4, H1 = H2 + H4. It is required that H1 = 1 / 3H, and 0.2H < H2 < 0.25H. This design ensures the overall mechanical strength of the first tooling component 1 and prevents deformation. The height of the locking component 3 is H5, and the height of the first locking arm 31 or the second locking arm 32 is H6. To ensure that the operating shaft 33 has sufficient length to cooperate with the assist wrench 16 outside the tooling component, H5 = 2H1 is required. To allow the first locking arm 31 to rotate smoothly within the first groove 10 and the second locking arm 32 to rotate smoothly within the second groove 12, H6 = H2 - 0.2mm is required. Both slot 18 and third slot 19 are at the same height as sleeve portion 162. The height of torque portion 161 is H7, and the height of sleeve portion 162 is H8. In order for sleeve portion 162 to completely cover the part of tooling component exposed outside operating shaft 33, H8 is required to be greater than H5 - H1.

[0066] Understandably, when the structures of the first tooling component 1 and the second tooling component 2 are identical, R1 = R2, D1 = D3, and D2 = D4. The width of the first clearance groove 20 or the second clearance groove 21 is D5, and the width of the first locking arm 31 or the second locking arm 32 is D6. To ensure that the locking component 3 can be assembled into the tooling component formed by assembling the first tooling component 1 and the second tooling component 2, D6 = D5 - 2mm is required. The width of the latching protrusion 17 is the same as the width of the first locking arm 31 or the second locking arm 32, which is also D6. The width of the third latching groove 19 is D7, and D7 = D6 + 0.1mm is required. The torque part 161 includes two intersecting cross blocks with a width of D8. To ensure the strength of the cross blocks and to allow for good force application when gripping the cross blocks, D8 = 2D5 is required.

[0067] Furthermore, such as Figure 5 and Figure 7 As shown, the first tooling component 1 and the second tooling component 2 are assembled to form a tooling part. The locking component 3 is assembled inside the tooling part. When the locking component 3 is in the unlocked state, an axial groove extending along the axial direction is formed on the tooling part. The radius of the axial groove is R6, and the radius of the circle containing the outer contours of the four locking protrusions 17 is R7. To ensure that the locking component 3 can smoothly enter the tooling part, R6 = R1 / 3 and R7 = R6 - 0.2mm are required. The radius of the circle containing the outer contours of the first locking arm 31 and the second locking arm 32 is R8, and the radius of the circle containing the outer contours of the four third locking slots 19 is R9. To ensure that the sleeve part 162 of the power wrench 16 can be fitted onto the operating shaft 33, R9 > R8 + 3mm are required. The radius of the circle containing the outer contour of the torque part 161 is R10 To ensure that the torque unit 161 can provide sufficient torque, it is required to meet R. 10 >R1.

[0068] Finally, it should be noted that the specific working process of the plug gauge tooling is as follows: First, place the first tooling component 1 and the second tooling component 2 in the stator, with the first clearance groove 20 and the second clearance groove 21 both facing upwards. Then, place the locking component 3 into the first tooling component 1 and the second tooling component 2 through the first clearance groove 20 and the second clearance groove 21. Next, put the power wrench 16 on the operating shaft 33 of the locking component 3 and rotate the power wrench 16 clockwise until it can no longer be rotated. Then remove the power wrench 16. After that, put the heated housing on the stator. Finally, after the housing cools down and stops pressing the stator, put the power wrench 16 back on and rotate it counterclockwise to remove the first tooling component 1, the second tooling component 2, and the locking component 3.

[0069] The following provides actual compressor assembly data for a certain model of 12-slot 8-pole motor:

[0070] Theoretical stator-rotor air gap width Actual air gap width after installation This application has not been used. 0.5mm <0.3mm Use this application 0.5mm >0.4mm

[0071] As can be seen from the table, after applying the solution of this application, the air gap width between the stator and rotor is significantly closer to the theoretical air gap width between the stator and rotor.

[0072] It will be readily understood by those skilled in the art that, without conflict, the advantageous technical features of the above-mentioned methods can be freely combined and superimposed.

[0073] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model. The above are only preferred embodiments of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of this utility model, and these improvements and modifications should also be considered within the protection scope of this utility model.

Claims

1. A plug gauge fixture, capable of being placed in the inner circle of a stator, characterized in that, The plug gauge tooling includes a first tooling component (1), a second tooling component (2), and a locking component (3). The first tooling component (1) and the second tooling component (2) are assembled to form a tooling component, and the locking component (3) is assembled inside the tooling component. The locking component (3) has a locked state. When the locking component (3) is in the locked state, the locking component (3) applies a force outward along the radial direction of the stator to the tooling component so that the tooling component abuts against and is supported on the inner circumferential surface of the stator.

2. The plug gauge fixture according to claim 1, characterized in that, The locking component (3) also has an unlocked state, in which the locking component (3) releases the radially outward force applied to the tooling component.

3. The plug gauge fixture according to claim 1, characterized in that, The first tooling component (1) has a first assembly surface (4) and a first snap-fit ​​part (5), and a first slot is formed between the first assembly surface (4) and the first snap-fit ​​part (5); the second tooling component (2) has a second assembly surface (6) and a second snap-fit ​​part (7), and a second slot is formed between the second assembly surface (6) and the second snap-fit ​​part (7); the width of the first snap-fit ​​part (5) is smaller than the groove width of the second slot, and the width of the second snap-fit ​​part (7) is smaller than the groove width of the first slot. After the first snap-fit ​​part (5) is snapped into the second slot and the second snap-fit ​​part (7) is snapped into the first slot, the first tooling component (1) and the second tooling component (2) are assembled to form the tooling part.

4. The plug gauge fixture according to claim 3, characterized in that, The first tooling component (1) has an arc-shaped first outer curved surface (8) with a radius of curvature of R1. The second tooling component (2) has an arc-shaped second outer curved surface (9) with a radius of curvature of R2. The width of the first snap-fit ​​part (5) is D1, where D1 = 0.2R1. The width of the first slot is D2, where 0.23R2 < D2 < 0.25R2. The width of the second snap-fit ​​part (7) is D3, where D3 = 0.2R2. The width of the second slot is D4, where 0.23R1 < D4 < 0.25R1.

5. The plug gauge fixture according to claim 2, characterized in that, The first tooling component (1) has a first groove (10) formed inside. The first groove (10) has a first groove wall surface that extends circumferentially along the first tooling component (1) and is arc-shaped. Along the circumferential direction of the first tooling component (1), the radius of curvature of the first groove wall surface gradually decreases. The locking component (3) has a first locking arm (31). The first locking arm (31) is located inside the first groove (10). The free end of the first locking arm (31) has a first mating surface (11) that is arc-shaped. The radius of curvature of the first mating surface (11) is between the minimum radius of curvature and the maximum radius of curvature of the first groove wall surface. The second tooling component (2) has a second groove (12) formed therein. The second groove (12) has a second groove wall surface that extends circumferentially along the second tooling component (2) and is arc-shaped. Along the circumferential direction of the second tooling component (2), the radius of curvature of the second groove wall surface gradually decreases. The locking component (3) has a second locking arm (32). The second locking arm (32) is located in the second groove (12). The free end of the second locking arm (32) has a second mating surface (13) that is arc-shaped. The radius of curvature of the second mating surface (13) is between the minimum radius of curvature and the maximum radius of curvature of the second groove wall surface. The locking component (3) switches between the locked state and the unlocked state by rotating relative to the tooling component.

6. The plug gauge fixture according to claim 5, characterized in that, The first tooling component (1) has an arc-shaped first outer curved surface (8) with a radius of curvature of R1. After the first locking arm (31) rotates by an angle a1 along the circumference of the first groove (10), the radius of curvature of the first groove wall decreases by K1R1, where 22° < a1 < 30° and 1.2% < K1 ≤ 1.5%. The second tooling component (2) has an arc-shaped second outer curved surface (9) with a radius of curvature of R2. After the second locking arm (32) rotates by an angle a2 along the circumference of the second groove (12), the radius of curvature of the second groove wall decreases by K2R2, where 22° < a2 < 30° and 1.2% < K2 ≤ 1.5%.

7. The plug gauge fixture according to claim 6, characterized in that, The central angle corresponding to the first groove wall is b1, 3a1 < b1 < 4a1; the central angle corresponding to the second groove wall is b2, 3a2 < b2 < 4a2.

8. The plug gauge tooling according to claim 6, characterized in that, When the locking component (3) is in the locked state, both the first outer curved surface (8) and the second outer curved surface (9) are in contact with the inner circumferential surface of the stator.

9. The plug gauge fixture according to claim 5, characterized in that, The locking component (3) also has an operating shaft (33), on which the first locking arm (31) and the second locking arm (32) are both located. The operating shaft (33) extends from the inside of the tooling component to the outside of the tooling component along the axial direction of the tooling component. And / or, a first stop structure (14) is formed in the first tooling section (1), and the first stop structure (14) is used to stop the first lock arm (31) during the rotation of the first lock arm (31) along the first groove (10); a second stop structure (15) is formed in the second tooling section (2), and the second stop structure (15) is used to stop the second lock arm (32) during the rotation of the second lock arm (32) along the second groove (12).

10. The plug gauge fixture according to claim 9, characterized in that, An assist wrench (16) is assembled on the operating shaft (33), and the assist wrench (16) is located outside the tooling component.

11. The plug gauge tooling according to claim 10, characterized in that, The operating shaft (33) includes a body and a latch (17) formed on the body. The power wrench (16) has a slot (18) and a third latch (19) communicating with the slot (18). The body is inserted into the slot (18), and the latch (17) is engaged in the third latch (19).

12. The plug gauge fixture according to claim 1, characterized in that, The first tooling component (1) has the same structure as the second tooling component (2).

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