Centering press-fitting device for assembling rotor assembly and cylinder body assembly

Abstract

According to the centering press-fitting device for assembling the rotor assembly and the cylinder body assembly, the cylinder body assembly is positioned at the preset position on the pressing plate only through the first positioning assembly, and the rotor assembly is positioned at the preset position on the base through the second positioning assembly; and then the corresponding guide columns are sleeved with the guide sliding holes in the pressing plate respectively, and the cylinder body assembly can be pressed to the rotor assembly through linear drivers such as an air cylinder and the like. In the press-fitting process of the cylinder body assembly and the rotor assembly of the motor, the stability between the cylinder body assembly and the rotor assembly of the motor can be kept under the guiding action of the guide columns; the central axis of the alignment hole in the pressing plate, the central axis of the shaft hole in the cylinder body assembly and the central axis of the positioning hole in the second positioning assembly are always kept collinear, so that the phenomena of deviation and dislocation of the rotor assembly in the press fitting process can be avoided; therefore, the cylinder body assembly and the rotor assembly of the motor are kept centered and can be assembled in place at a time.

Description

Technical Field

[0001] The utility model belongs to the technical field of air compressor assembly equipment, and particularly relates to an alignment press-fitting device for assembling a rotor assembly and a cylinder block assembly. Background Art

[0002] The air compressor used in an automotive air suspension system is used to compress the input air to provide high-pressure compressed air and input the compressed air into a gas storage container such as a gas storage tank or an air spring to improve the driving stability, smoothness and comfort of the vehicle. Currently, the air compressor includes a compression cylinder, a piston assembly disposed in the compression cylinder, and an electric motor that drives the piston assembly to perform piston movement in the compression cylinder. During the production and manufacturing process of the air compressor, it is usually necessary to press-fit the cylinder block assembly and the rotor assembly of the electric motor. Since the cylinder block assembly and the rotor assembly of the electric motor are completely assembled by hand, it is difficult to maintain the stability between the cylinder block assembly and the rotor assembly of the electric motor, resulting in the rotor assembly being offset and misaligned during the press-fitting process, causing the cylinder block assembly and the rotor assembly of the electric motor to be misaligned and unable to achieve one-time assembly in place. Summary of the Utility Model

[0003] Based on the above problems existing in the prior art, one of the purposes of the embodiments of the present utility model is to provide an alignment press-fitting device for assembling a rotor assembly and a cylinder block assembly to solve the problem in the prior art that it is difficult to maintain the stability between the cylinder block assembly and the rotor assembly by relying on manual assembly of the cylinder block assembly and the rotor assembly, resulting in the cylinder block assembly and the rotor assembly being offset and misaligned and unable to achieve one-time assembly in place.

[0004] To achieve the above purpose, the technical solution adopted by the present utility model is: to provide an alignment press-fitting device for assembling a rotor assembly and a cylinder block assembly, including:

[0005] A base;

[0006] A pressing plate for press-fitting the cylinder block assembly onto the rotor assembly, and the pressing plate is disposed above the base;

[0007] A guiding assembly for guiding the pressing plate to press down the cylinder block assembly. The guiding assembly includes at least two guide posts that are parallel and spaced apart between the pressing plate and the base. Corresponding guiding sliding holes for slidingly cooperating with the guide posts are provided on the pressing plate, and each guiding sliding hole is sleeved on the corresponding guide post;

[0008] A first positioning assembly for positioning the cylinder block assembly on the pressing plate; and

[0009] A second positioning assembly for positioning the rotor assembly on the base;

[0010] Among them, the pressing plate is provided with alignment holes for aligning with the shaft holes on the cylinder block assembly, and the second positioning assembly is provided with positioning holes that align with the alignment holes; after the rotor assembly is positioned on the base through the second positioning assembly, the rotor shaft of the rotor assembly is received and positioned in the positioning holes, so that the central axis of the rotor shaft is collinear with the central axis of the alignment holes.

[0011] Further, the first positioning assembly includes two L-shaped positioning clamp blocks arranged in pairs and a first fastener for fastening the positioning clamp blocks to a predetermined position on the pressing plate.

[0012] Further, each of the positioning clamp blocks is provided with an arc-shaped bayonet for clamping the cylinder block assembly.

[0013] Further, the second positioning assembly includes a gantry arranged on the base, a second fastener for fastening the gantry to a predetermined position on the base, a positioning seat arranged on the base and below the gantry, and a third fastener for fastening the positioning seat to a predetermined position on the base. The positioning holes are arranged on the gantry.

[0014] Further, the gantry is provided with a guiding port for guiding the rotor shaft into the positioning holes, and the rotor shaft is provided with a shaft shoulder for abutting against the gantry to suspend the rotor assembly on the gantry.

[0015] Further, the centering and pressing device for assembling the rotor assembly and the cylinder block assembly further includes a heightening collar sleeved outside the shaft shoulder of the rotor shaft.

[0016] Further, the heightening collar includes at least three arc-shaped petal-shaped heightening blocks, and at least three of the arc-shaped petal-shaped heightening blocks enclose to form the annular heightening collar.

[0017] Further, the centering and pressing device for assembling the rotor assembly and the cylinder block assembly further includes a calibration head for calibrating whether the alignment holes are aligned with the shaft holes on the cylinder block assembly.

[0018] Further, the calibration head includes a plug-in column for slidably inserting into the alignment holes, a limit convex ring arranged at one end of the plug-in column, and a calibration shaft for being inserted into the shaft holes on the cylinder block assembly in a matching manner to calibrate the concentricity of the alignment between the alignment holes and the shaft holes on the cylinder block assembly. The calibration shaft is arranged at the other end of the plug-in column.

[0019] Further, the centering and pressing device for assembling the rotor assembly and the cylinder block assembly further includes a cylinder or a hydraulic cylinder for pushing the pressing plate to press down the cylinder block assembly and a shock absorber for stopping the pressing plate to limit the further downward pressing of the pressing plate. The shock absorber is arranged on the guide post or the base.

[0020] One or more of the above technical solutions in the embodiments of the present utility model, compared with the prior art, have at least one of the following beneficial effects:

[0021] For the centering press-fitting device for assembling the rotor assembly and the cylinder block assembly in the embodiments of the present utility model, only the cylinder block assembly needs to be positioned at a predetermined position on the pressing plate through the first positioning component, the rotor assembly is positioned at a predetermined position on the base through the second positioning component, and then the guiding sliding holes on the pressing plate are respectively sleeved on the corresponding guide posts, and a linear driver such as a cylinder can be used to press-fit the cylinder block assembly onto the rotor assembly. During the process of press-fitting the cylinder block assembly and the rotor assembly of the motor, the stability between the cylinder block assembly and the rotor assembly of the motor can be maintained under the guiding action of the guide posts, and the central axis of the alignment hole on the pressing plate, the central axis of the shaft hole on the cylinder block assembly, and the central axis of the positioning hole on the second positioning component are always collinear, which can avoid the phenomenon of the rotor assembly shifting and misaligning during the press-fitting process, so that the cylinder block assembly and the rotor assembly of the motor are centered and can be assembled in place at one time. Description of the Drawings

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model, the following will briefly introduce the drawings required for use in the embodiments or the description of the prior art. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0023] Figure 1 Schematic three-dimensional structure diagram of the centering press-fitting device for assembling the rotor assembly and the cylinder block assembly provided by the embodiment of the present utility model;

[0024] Figure 2 For Figure 1 Schematic cross-sectional structure diagram of the centering press-fitting device for assembling the rotor assembly and the cylinder block assembly shown in ;

[0025] Figure 3 Schematic three-dimensional structure diagram of the centering press-fitting device for assembling the rotor assembly and the cylinder block assembly provided by another embodiment of the present utility model;

[0026] Figure 4 Schematic three-dimensional structure diagram of the centering press-fitting device for assembling the rotor assembly and the cylinder block assembly provided by another embodiment of the present utility model;

[0027] Figure 5 For Figure 4 Schematic cross-sectional structure diagram of the centering press-fitting device for assembling the rotor assembly and the cylinder block assembly shown in ;

[0028] Figure 6 Schematic three-dimensional structure diagram of the pressing plate provided by an embodiment of the present utility model;

[0029] Figure 7 Schematic three-dimensional structure diagram of the heightening collar provided by an embodiment of the present utility model;

[0030] Figure 8 Exploded view of the centering press-fitting device for assembling the rotor assembly and the cylinder block assembly provided by an embodiment of the present utility model.

[0031] Among them, the reference numerals in the figures are as follows:

[0032] 1 - Base;

[0033] 2 - Pressing plate; 21 - Guide sliding hole; 22 - Alignment hole; 23 - Engaging groove;

[0034] 3 - Guide assembly; 31 - Guide post;

[0035] 4 - First positioning assembly; 41 - Positioning clamp block; 42 - Arc-shaped bayonet;

[0036] 5 - Second positioning assembly; 51 - Gantry; 52 - Positioning seat; 521 - Accommodating groove; 522 - Positioning groove; 53 - Second fastener; 54 - Third fastener; 55 - Positioning hole; 56 - Guiding port;

[0037] 6 - Cylinder block assembly; 61 - Axial hole;

[0038] 7 - Rotor assembly; 71 - Rotor shaft; 72 - Axial shoulder;

[0039] 8 - Heightening collar; 81 - Petal-shaped heightening block;

[0040] 9 - Calibration head; 91 - Insertion post; 92 - Limiting convex ring; 93 - Calibration shaft;

[0041] 10 - First bearing; 20 - Shock absorber; 30 - Second bearing. Detailed implementation manners

[0042] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0043] It should be noted that when an element is referred to as "connected to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0044] In addition, the terms "first" and "second" are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, "a plurality of" means two or more, unless otherwise specifically defined. "A plurality of" means one or more, unless otherwise specifically defined.

[0045] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the indicated device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation on the present utility model.

[0046] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installed", "connected" and "coupled" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0047] Reference throughout the specification to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the present application. Thus, the phrases "in one embodiment", "in some embodiments", or "in some of these embodiments" appearing throughout the specification are not necessarily all referring to the same embodiment. Additionally, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

[0048] Please refer to Figures 1 to 7, the centering and press-fitting device for the rotor assembly 7 and the cylinder block assembly 6 provided in the embodiments of the present invention will be described. The centering and press-fitting device for the rotor assembly 7 and the cylinder block assembly 6 provided in the embodiments of the present invention includes a base 1, a pressure plate 2, a guiding assembly 3, a first positioning assembly 4, and a second positioning assembly 5. The pressure plate 2 is disposed above the base 1, and the cylinder block assembly 6 can be press-fitted onto the rotor assembly 7 by a linear actuator such as a cylinder. The guiding assembly 3 is used to guide the pressure plate 2 to press down the cylinder block assembly 6 to prevent the pressure plate 2 from shifting in position during the process of pressing down the cylinder block assembly 6. The guiding assembly 3 includes at least two guide posts 31 that are parallel and spaced between the pressure plate 2 and the base 1. The central axis of each guide post 31 is perpendicular to the plane where the base 1 is located. Corresponding guiding sliding holes 21 for slidingly cooperating with the guide posts 31 are provided on the pressure plate 2. Each guiding sliding hole 21 is sleeved on the corresponding guide post 31, so that the pressure plate 2 is slidably mounted on at least two guide posts 31. The first positioning assembly 4 is used to position the cylinder block assembly 6 on the pressure plate 2, and the second positioning assembly 5 is used to position the rotor assembly 7 on the base 1. Among them, a positioning hole 22 for centering with the shaft hole 61 on the cylinder block assembly 6 is provided on the pressure plate 2, and a positioning hole 55 that is centered with the positioning hole 22 is provided on the second positioning assembly 5. After the rotor assembly 7 is positioned on the base 1 through the second positioning assembly 5, the rotor shaft 71 of the rotor assembly 7 is received and positioned in the positioning hole 55, so that the central axis of the rotor shaft 71 is collinear with the central axis of the positioning hole 22, and the central axes of the positioning hole 22 on the pressure plate 2, the shaft hole 61 on the cylinder block assembly 6, and the positioning hole 55 on the second positioning assembly 5 are collinear, so that the cylinder block assembly 6 and the rotor assembly 7 of the motor are kept centered and can be assembled in place at one time. In addition, for the centering and press-fitting device for the rotor assembly 7 and the cylinder block assembly 6 provided in the embodiments of the present invention, during the process of press-fitting the cylinder block assembly 6 and the rotor assembly 7 of the motor, the stability between the cylinder block assembly 6 and the rotor assembly 7 of the motor can be maintained, and the phenomenon that the rotor assembly 7 shifts or is misaligned during the press-fitting process can be avoided, so that the cylinder block assembly 6 and the rotor assembly 7 of the motor are kept centered and can be assembled in place at one time.

[0049] The centering and press-fitting device for the rotor assembly 7 and the cylinder block assembly 6 provided by the embodiment of the present utility model, compared with the prior art, only needs to position the cylinder block assembly 6 at a predetermined position on the pressing plate 2 through the first positioning assembly 4, position the rotor assembly 7 at a predetermined position on the base 1 through the second positioning assembly 5, and then respectively sleeved the guiding sliding holes 21 on the pressing plate 2 on the corresponding guiding columns 31. A linear driver such as a cylinder can be used to press-fit the cylinder block assembly 6 onto the rotor assembly 7. During the process of press-fitting the cylinder block assembly 6 and the rotor assembly 7 of the motor, the stability between the cylinder block assembly 6 and the rotor assembly 7 of the motor can be maintained under the guiding action of the guiding column 31, and the central axis of the alignment hole 22 on the pressing plate 2, the central axis of the shaft hole 61 on the cylinder block assembly 6, and the central axis of the positioning hole 55 on the second positioning assembly 5 are always kept collinear, which can avoid the phenomenon of offset and dislocation of the rotor assembly 7 during the press-fitting process, so that the cylinder block assembly 6 and the rotor assembly 7 of the motor are centered and can be assembled in place at one time.

[0050] Please further refer to Figure 1 、 Figure 2 and Figure 3 In some embodiments, the first positioning assembly 4 includes two L-shaped positioning clamping blocks 41 arranged in pairs and a first fastener for fastening the positioning clamping blocks 41 to a predetermined position on the pressing plate 2. When the positioning clamping blocks 41 are fastened to a predetermined position on the pressing plate 2 through the first fastener, the two L-shaped positioning clamping blocks 41 can clamp and position the cylinder block assembly 6 at a predetermined position on the pressing plate 2, so that the shaft hole 61 on the cylinder block assembly 6 is aligned with the alignment hole 22 on the pressing plate 2 without offset and dislocation.

[0051] Please further refer to Figure 1 、 Figure 2 and Figure 3 In some embodiments, each positioning clamping block 41 is provided with an arc-shaped bayonet 42 for clamping the lower part of the cylinder block assembly 6, and the pressing plate 2 is provided with a clamping groove 23 for clamping and positioning the upper part of the cylinder block assembly 6. After the upper part of the cylinder block assembly 6 is clamped in the clamping groove 23 of the pressing plate 2, the cylinder block assembly 6 can be installed in place according to the predetermined position. Then, the lower part of the cylinder block assembly 6 is clamped by the arc-shaped bayonets 42 on each positioning clamping block 41, and then fastened to the pressing plate 2 through the first fastener. While clamping and positioning the cylinder block assembly 6, each positioning clamping block 41 can also press the cylinder block assembly 6 against the clamping groove 23 of the pressing plate 2, which can enhance the stability between the cylinder block assembly 6 and the rotor assembly 7 of the motor and can avoid the phenomenon of offset and dislocation of the rotor assembly 7 during the press-fitting process of the cylinder block assembly 6.

[0052] Please further refer to Figure 1 、 Figure 2 and Figure 3, in some embodiments, the second positioning component 5 includes a gantry 51 disposed on the base 1, a second fastener 53 for fastening the gantry 51 to a predetermined position on the base 1, a positioning seat 52 disposed on the base 1 and below the gantry 51, and a third fastener 54 for fastening the positioning seat 52 to a predetermined position on the base 1. A positioning hole 55 is provided on the gantry 51. When the gantry 51 is fastened to a predetermined position on the base 1 by the second fastener 53, the positioning hole 55 on the gantry 51 and the alignment hole 22 on the pressing plate 2 can be kept in alignment without offset or dislocation, so that the central axis of the rotor shaft 71 in the positioning hole 55 is collinear with the central axis of the alignment hole 22, which is beneficial to keeping the cylinder block assembly 6 and the rotor assembly 7 of the motor in alignment and enabling one-time assembly in place.

[0053] Please further refer to Figure 1 , Figure 2 and Figure 3 , in some embodiments, a guiding opening 56 for guiding the rotor shaft 71 into the positioning hole 55 is provided on the gantry 51, which facilitates the rotor shaft 71 of the rotor assembly 7 to be received and positioned in the positioning hole 55 on the gantry 51. A shoulder 72 for abutting against the gantry 51 is provided on the rotor shaft 71. After the rotor shaft 71 of the rotor assembly 7 is received and positioned in the positioning hole 55 on the gantry 51, due to the abutting action between the shoulder 72 and the gantry 51, the rotor shaft 71 is supported on the gantry 51 through the shoulder 72, so that the entire rotor assembly 7 is only hung on the gantry 51 through the rotor shaft 71, which is beneficial to keeping the central axis of the rotor shaft 71 collinear with the central axis of the alignment hole 22.

[0054] Please further refer to Figure 1 , Figure 2 and Figure 3 , in some embodiments, the centering and press-fitting device for the rotor assembly 7 and the cylinder block assembly 6 further includes a heightening collar 8 sleeved outside the shoulder 72 of the rotor shaft 71. The bottom end of the heightening collar 8 is supported on the gantry 51, and the top end of the heightening collar 8 supports the outer ring of the first bearing 10 sleeved on the rotor shaft 71. By supporting the outer ring of the first bearing 10 through the heightening collar 8, deformation of the outer ring of the first bearing 10 during the press-fitting process is prevented. In addition, since the shoulder 72 supports the inner ring of the first bearing 10, the inner ring and the outer ring of the first bearing 10 may be offset or misaligned during the press-fitting process.

[0055] Please further refer to Figure 1 , Figure 2 and Figure 3, in some embodiments, the spacer collar 8 includes at least three arc-shaped flap-like spacer blocks 81, and the at least three arc-shaped flap-like spacer blocks 81 enclose to form an annular spacer collar 8, which can facilitate the disassembly and installation of the spacer collar 8.

[0056] Please further refer to Figure 1 , Figure 2 and Figure 3 , in some embodiments, the centering and pressing device for the rotor assembly 7 and the cylinder block assembly 6 further includes a calibration head 9 for calibrating whether the alignment hole 22 is centered with the shaft hole 61 on the cylinder block assembly 6. Specifically, the calibration head 9 includes a plug post 91 for slidably inserting into the alignment hole 22, a limit collar 92 provided at one end of the plug post 91, and a calibration shaft 93 for being inserted into the shaft hole 61 on the cylinder block assembly 6 to calibrate the concentricity of the alignment of the alignment hole 22 and the shaft hole 61 on the cylinder block assembly 6. The calibration shaft 93 is provided at the other end of the plug post 91. When calibrating, only need to slidably insert the plug post 91 into the alignment hole 22, and press down the limit collar 92 until the limit collar 92 abuts against the upper surface of the pressing plate 2. At this time, the calibration shaft 93 is inserted into the shaft hole 61 on the cylinder block assembly 6, which can play a role in calibrating the concentricity of the alignment of the alignment hole 22 on the pressing plate 2 and the shaft hole 61 on the cylinder block assembly 6, fully ensuring that the central axis of the rotor shaft 71 in the positioning hole 55 is collinear with the central axis of the alignment hole 22, which is beneficial to keeping the cylinder block assembly 6 and the rotor assembly 7 of the motor centered and enabling one-time assembly in place.

[0057] Please further refer to Figure 1 , Figure 2 and Figure 3 , in some embodiments, the centering and pressing device for the rotor assembly 7 and the cylinder block assembly 6 further includes a cylinder or a hydraulic cylinder for pushing the pressing plate 2 to press down the cylinder block assembly 6 and a shock absorber 20 for stopping the pressing plate 2 to limit the further downward pressing of the pressing plate 2. The shock absorber 20 is provided on the guide post 31 or the base 1. In addition, a second bearing 30 is sleeved on the end of the rotor shaft 71 away from the cylinder block assembly 6, and a receiving groove 521 for receiving the second bearing 30 and a positioning groove 522 for positioning the end of the rotor shaft 71 away from the cylinder block assembly 6 are provided on the positioning seat 52.

[0058] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A centering press-fitting device for assembling a rotor assembly and a cylinder block assembly, characterized in that Comprising: A base; A pressing plate for press-fitting a cylinder block assembly onto a rotor assembly, the pressing plate being disposed above the base; A guiding assembly for guiding the pressing plate to press down the cylinder block assembly. The guiding assembly includes at least two guide posts that are parallel and spaced between the pressing plate and the base. Corresponding guiding sliding holes for slidably cooperating with the guide posts are provided on the pressing plate, and each of the guiding sliding holes is sleeved on a corresponding guide post; A first positioning assembly for positioning the cylinder block assembly on the pressing plate; And A second positioning assembly for positioning the rotor assembly on the base; Wherein, a positioning hole for aligning with a shaft hole on the cylinder block assembly is provided on the pressing plate, and a positioning hole that aligns with the positioning hole is provided on the second positioning assembly; after the rotor assembly is positioned on the base through the second positioning assembly, the rotor shaft of the rotor assembly is received and positioned in the positioning hole, so that the central axis of the rotor shaft is collinear with the central axis of the positioning hole.

2. The centering press-fitting device for assembling a rotor assembly and a cylinder block assembly according to claim 1, wherein, The first positioning assembly includes two L-shaped positioning clamping blocks arranged in pairs and a first fastener for fastening the positioning clamping blocks to a predetermined position on the pressing plate.

3. The centering press-fitting device for assembling a rotor assembly and a cylinder block assembly according to claim 2, wherein, Each of the positioning clamping blocks is provided with an arc-shaped clamping opening for clamping the cylinder block assembly.

4. The centering press-fitting device for assembling a rotor assembly and a cylinder block assembly according to claim 1, wherein The second positioning assembly includes a gantry arranged on the base, a second fastener for fastening the gantry to a predetermined position on the base, a positioning seat arranged on the base and below the gantry, and a third fastener for fastening the positioning seat to a predetermined position on the base. The positioning hole is provided on the gantry.

5. The centering press-fitting device for assembling a rotor assembly and a cylinder block assembly according to claim 4, wherein, A guiding opening for guiding the rotor shaft into the positioning hole is provided on the gantry, and a shaft shoulder for abutting against the gantry to suspend the rotor assembly on the gantry is provided on the rotor shaft.

6. The centering press-fitting device for assembling a rotor assembly and a cylinder block assembly according to claim 5, characterized in that, The centering press-fitting device for assembling the rotor assembly and the cylinder block assembly further includes a heightening collar sleeved outside the shaft shoulder of the rotor shaft.

7. The centering press-fitting device for assembling the rotor assembly and the cylinder block assembly according to claim 6, characterized in that, The heightening collar includes at least three arc-shaped petal-shaped heightening blocks, and at least three of the arc-shaped petal-shaped heightening blocks enclose to form the circular heightening collar.

8. The centering press-fitting device for assembling a rotor assembly and a cylinder block assembly according to claim 1, characterized in that, The centering press-fitting device for assembling the rotor assembly and the cylinder block assembly further includes a calibration head for calibrating whether the positioning hole aligns with the shaft hole on the cylinder block assembly.

9. The centering press-fitting device for assembling the rotor assembly and the cylinder block assembly according to claim 8, wherein The calibration head includes a plugging post for slidably plugging into the positioning hole, a limiting convex ring provided at one end of the plugging post, and a calibration shaft for being correspondingly plugged into the shaft hole on the cylinder block assembly to calibrate the concentricity of the alignment between the positioning hole and the shaft hole on the cylinder block assembly. The calibration shaft is provided at the other end of the plugging post.

10. The centering press-fitting device for assembling a rotor assembly and a cylinder block assembly according to any one of claims 1 to 9, characterized in that The centering press-fitting device for assembling the rotor assembly and the cylinder block assembly further includes a cylinder or a hydraulic cylinder for pushing the pressing plate to press down the cylinder block assembly and a shock absorber for stopping the pressing plate to limit the further downward pressing of the pressing plate. The shock absorber is provided on the guide post or the base.

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