Rotor assembly riveting device and compressor

Abstract

The utility model discloses a rotor assembly riveting device and a compressor, the rotor assembly riveting device comprises a rotor assembly, an expansion mandrel, a rotor fixing assembly and a riveting power assembly, the expansion mandrel comprises an expansion sleeve and an inner support rod; the rotor assembly is located below the riveting power assembly, the rotor assembly is provided with an inner hole, the expansion sleeve is arranged in the inner hole, the inner supporting rod is inserted in the expansion sleeve, the rotor fixing assembly is located below the rotor assembly, the rotor fixing assembly is connected with the rotor assembly, the upper end of the inner supporting rod penetrates through the rotor fixing assembly, and the lower end of the inner supporting rod is arranged in the rotor fixing assembly. By implementing the device provided by the utility model, the problems of the motor rotor riveting device in the prior art that the inner hole is deformed, the assembly is difficult, and the tool mandrel is abraded can be solved.

Description

Technical Field

[0001] This utility model relates to the field of rotor assembly technology, and in particular to a rotor assembly riveting device and a compressor. Background Technology

[0002] In the manufacturing process of variable frequency compressors, the riveting of the rotor assembly is a critical step. Traditional riveting processes employ methods such as... Figures 1 to 3 The structure shown depicts a rotor assembly whose inner bore is supported by a mandrel during riveting. The upper part of the riveting device is pressed down under hydraulic pressure to complete the riveting. During riveting, the mandrel supports the inner bore of the rotor assembly, reducing deformation. To facilitate handling of the rotor assembly, when the inner diameter of the rotor assembly is 12.870 ± 0.018 mm, the outer diameter of the mandrel is designed to be 12.86 ± 0.005 mm. This results in a gap between the mandrel and the rotor assembly bore. Furthermore, with increasing riveting cycles, the outer diameter of the mandrel gradually decreases due to wear, increasing the gap between the mandrel and the inner bore of the rotor assembly. Without the support of the mandrel, the deformation of the rotor assembly's inner bore will increase. Increasing the outer diameter of the mandrel would reduce the gap between the mandrel and the inner diameter of the rotor assembly, making it difficult to handle during riveting. Additionally, the original riveting equipment lacks a rotor assembly inner diameter measurement function, requiring measurement after riveting. These problems not only affect production efficiency but also lead to a decline in product quality.

[0003] Specifically, during the riveting process, the high pressure of the riveting machine can easily deform the inner diameter of the rotor assembly. This deformation leads to a reduction in the overall inner diameter of the rotor assembly, resulting in poor assembly during subsequent crankshaft assembly and severely impacting the compressor's quality and performance. Because the rotor assembly's inner diameter is smaller, the original clearance fit with the riveting equipment's mandrel becomes an interference fit. This means that after riveting, the rotor assembly is difficult to remove smoothly from the mandrel, increasing assembly difficulty and time costs. The tooling mandrel is also prone to wear during the handling of the rotor assembly. As the mandrel wears, the deformation of the rotor assembly's inner diameter after riveting gradually increases, further exacerbating assembly problems. Furthermore, frequent replacement or repair of the mandrel also increases production costs. After riveting, a measuring instrument is needed to measure the inner diameter of the rotor assembly to ensure its dimensions meet requirements. However, this process is cumbersome and time-consuming, impacting production efficiency.

[0004] Chinese patent CN201320286004.1 discloses a motor rotor riveting device. The main utility model of this device is that it uses equipment to perform riveting instead of manual operation, and can rivet eight rivets on the motor rotor at the same time. Although this device improves riveting efficiency to a certain extent, it still fails to completely solve the problems mentioned above, such as inner hole deformation, assembly difficulties, tooling mandrel wear, and inconvenient measurement.

[0005] Therefore, it is necessary to design a new device to solve the problems of the motor rotor riveting device in the prior art in terms of inner hole deformation, assembly difficulty and tooling core shaft wear. Utility model content

[0006] The utility model discloses to overcome the defects of prior art, provide a rotor assembly riveting device and compressor.

[0007] To solve the above technical problems, the utility model discloses a rotor assembly riveting device, which comprises a rotor assembly, an expansion core shaft, a rotor fixing assembly and a riveting power assembly.The expansion core shaft comprises a sleeve and an inner support rod.The rotor assembly is located below the riveting power assembly, and the rotor assembly is provided with an inner hole.The sleeve is placed in the inner hole, and the inner support rod is inserted into the sleeve.The rotor fixing assembly is located below the rotor assembly, and the rotor fixing assembly is connected with the rotor assembly.The upper end of the inner support rod penetrates through the rotor fixing assembly, and the lower end of the inner support rod is placed in the rotor fixing assembly.

[0008] Further technical solutions are as follows: the distance between the outer diameter of the sleeve and the diameter of the inner hole is 0.015mm to 0.043mm.

[0009] Further technical solutions are as follows: the rotor fixing assembly comprises a rotor fixing assembly, a fixing seat mounting plate and a base assembly.The rotor fixing seat is connected below the rotor assembly, and the fixing seat mounting plate is connected below the rotor fixing seat.The base assembly comprises a base, a reset assembly and a limiting assembly.The lower end of the inner support rod is placed in the base, and the middle of the base is upwardly convex to form a convex block.The limiting assembly is located on the convex block.One end of the reset assembly is connected with the base, and the other end of the reset assembly is connected with the fixing seat mounting plate.

[0010] Further technical solutions are as follows: the reset assembly comprises a connecting rod, a guide sleeve and an elastic piece.The fixing seat mounting plate is provided with a first mounting hole, and the base is provided with a second mounting hole.One end of the connecting rod is inserted into the first mounting hole, and the other end of the connecting rod is inserted into the second mounting hole.The guide sleeve is connected to the outer surface of the connecting rod, and the elastic piece is located on the outer surface of the guide sleeve.One end of the elastic piece abuts against the upper end surface of the base, and the other end of the elastic piece abuts against the lower end surface of the fixing seat mounting plate.

[0011] Further technical solutions are as follows: the riveting power assembly comprises a riveting head, a guide plate, a mounting plate and a pneumatic cylinder connecting plate, the pneumatic cylinder connecting plate is connected with the mounting plate, the mounting plate is connected with the guide plate, one end of the riveting head is connected with the guide plate, and the other end of the riveting head abuts against the upper end surface of the rotor assembly.

[0012] Further technical solutions are as follows: the limiting assembly comprises an inductor.

[0013] Further technical solutions are as follows: the inner support rod is internally provided with a third through hole, and the inner support rod is further provided with a side edge inner through hole, the side edge inner through hole is communicated with the third through hole, and the side edge of the expansion sleeve is provided with a side edge outer through hole.

[0014] Further technical solutions are as follows: the measuring assembly is further connected with a pipeline, and the pipeline is inserted into the third through hole.

[0015] Further technical solutions are as follows: the limiting assembly comprises a limiting block.

[0016] In addition, the utility model discloses a kind of compressors to overcome the defects of prior art, comprising the rotor assembly riveting device described above.

[0017] The utility model has the advantages that: the utility model discloses an expansion sleeve and an inner support rod are combined by the design of the expansion mandrel, the deformation of the inner hole of the rotor during riveting is avoided, the expansion sleeve is placed in the inner hole of the rotor, the inner support rod provides additional support, ensures that the riveting pressure is evenly distributed, and reduces the risk of inner hole deformation;The design of the rotor fixing seat and the fixing seat mounting plate makes assembly more convenient, reduces assembly difficulty, the inner support rod and the expansion sleeve optimize the wear of the mandrel during use, improve durability, and solve the problems of the motor rotor riveting device of the prior art, such as inner hole deformation, assembly difficulty and tool mandrel wear.

[0018] The utility model will be further described below in combination with the drawings and specific embodiments. DRAWINGS

[0019] In order to more clearly illustrate the technical scheme of the embodiments of the utility model, the drawings needed in the embodiment description will be briefly introduced below, and obviously, the drawings in the following description are some embodiments of the utility model, and those skilled in the art can also obtain other drawings according to these drawings without creating labor.

[0020] Figure 1 It is a sectional structure schematic view of the riveting structure of the prior art;

[0021] Figure 2 It is a sectional structure schematic view of the mandrel of the prior art.

[0022] Figure 3 A sectional structure schematic view of a rotor assembly of the prior art;

[0023] Figure 4 A sectional structure schematic view of a riveting device for a rotor assembly provided by an embodiment of the present application;

[0024] Figure 5 A sectional structure schematic view of an expansion mandrel provided by an embodiment of the present application;

[0025] Figure 6 A sectional structure schematic view of a sleeve provided by an embodiment of the present application;

[0026] Figure 7 A sectional structure schematic view of an inner support rod provided by an embodiment of the present application;

[0027] Figure 8 A sectional structure schematic view of a riveting device for a rotor assembly provided by another embodiment of the present application;

[0028] Figure 9 A sectional structure schematic view of an expansion mandrel provided by another embodiment of the present application;

[0029] Figure 10 A perspective structure schematic view of a sleeve provided by another embodiment of the present application;

[0030] Figure 11 A sectional structure schematic view of a sleeve provided by another embodiment of the present application;

[0031] Figure 12 A perspective structure schematic view of an inner support rod provided by another embodiment of the present application;

[0032] Figure 13 A sectional structure schematic view of an inner support rod provided by another embodiment of the present application;

[0033] Explanation of signs in the figure:

[0034] 10, rotor assembly; 11, inner hole; 20, expanding mandrel; 21, expanding sleeve; 211, side outer through hole; 22, inner support rod; 221, third through hole; 222, side inner through hole; 30, rotor fixing seat; 31, first through hole; 40, fixing seat mounting plate; 41, second through hole; 50, base; 51, connecting rod; 52, guide sleeve; 53, elastic member; 54, limiting assembly; 55, adjusting screw; 56, protruding block; 60, rivet head; 61, guide plate; 62, mounting plate; 63, pneumatic cylinder connecting plate; 70, pipeline; 100, top plate; 101, rivet head mounting plate; 102, rivet head guide plate; 103, spring; 104, spring guide sleeve; 105, stripper plate backing plate; 106, stripper plate; 107, mandrel; 108, guide column. DETAILED DESCRIPTION

[0035] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0036] It should be understood that the terms "comprising" and "including" as used in the specification and the appended claims indicate the presence of the recited features, integers, steps, operations, elements, and / or components but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or groups thereof.

[0037] It should also be understood that the terms used in the present application specification are only for the purpose of describing specific embodiments and are not intended to limit the present application. As used in the present application specification and the appended claims, the singular forms "a", "an" and "the" are intended to include the plural forms unless the context clearly indicates otherwise.

[0038] It should be further understood that the term "and / or" as used in the present application specification and the appended claims means any combination of one or more of the associated listed items and all possible combinations thereof, and includes these combinations.

[0039] In the manufacturing process of the variable frequency compressor, the riveting device of the rotor assembly 10 is as follows Figures 1 to 3As shown, it includes a top plate 100, a rivet head mounting plate 62, a rivet head guide plate 102, a rivet head 60, a spring 103, a spring guide sleeve 104, a stripper plate backing plate 105, a stripper plate 106, a rotor assembly 10, a mandrel 107, a guide column 108, and a base 50. The riveting process faces problems such as deformation of the inner hole 11, assembly difficulty, and wear of the tooling mandrel 107. The traditional riveting process relies on the mandrel 107 to support the rotor inner hole 11, but as the mandrel 107 wears, the deformation of the inner hole 11 gradually increases. If the outer diameter of the mandrel 107 is increased, it may cause difficulty in taking and placing the rotor. The original scheme lacks an inner diameter measurement function and requires additional measurement, affecting production efficiency. There are also existing technologies that propose automated riveting equipment to improve riveting efficiency, but they do not solve the problems of inner hole 11 deformation and inconvenient measurement. Frequent replacement of the mandrel 107 and the time-consuming measurement process increase production costs and difficulty.

[0040] Therefore, the utility model embodiment provides a rotor assembly riveting device to solve the problems of the motor rotor riveting device in the prior art in terms of inner hole 11 deformation, assembly difficulty, and tooling mandrel 107 wear.

[0041] Specifically, the utility model embodiment proposes two solutions, one of which uses an expansion mandrel 20 structure, in which the expansion sleeve 21 cooperates with the inner support rod 22 to effectively prevent the inner hole 11 from deforming during riveting. By accurately designing the outer diameter of the expansion sleeve 21 and the diameter of the inner hole 11, precise fitting during riveting is ensured, and assembly difficulty is reduced. The setting of the base assembly and the reset assembly enables the inner support rod 22 to stably support the rotor assembly 10, reducing the wear of the mandrel 107 and improving the stability of assembly. The elastic member 53 in the reset assembly can provide necessary elastic support during riveting, preventing assembly difficulty caused by excessive stress. By adding the limiting component 54 and the inductor, accurate control of the riveting process is achieved, ensuring the accuracy and quality of riveting. In addition, a measuring device is also added, which can directly measure the diameter of the inner hole 11 of the rotor assembly 10.

[0042] The other solution differs from the above solution in that it uses a combination of a measuring hole-free expansion sleeve 21 and a measuring hole-free inner support rod 22. During riveting, the rotor assembly 10 is pressed down by the air cylinder and the expansion sleeve 21 expands to support the rotor inner hole 11. The riveting limit block is used to limit the expansion degree to avoid excessive deformation. After riveting, the outer diameter of the expansion sleeve 21 returns to the initial state, but it cannot achieve 100% measurement of the rotor inner diameter. This solution simplifies processing and reduces costs, making it suitable for occasions with lower accuracy requirements.

[0043] In order to better understand the above technical solutions, the above technical solutions will be described in detail below in conjunction with the drawings in the specification and specific embodiments.

[0044] Please refer to Figures 4 to 7The riveting device for the rotor assembly comprises a rotor assembly 10, an expansion mandrel 20, a rotor fixing assembly and a riveting power assembly. The expansion mandrel 20 comprises an expansion sleeve 21 and an inner support rod 22. The rotor assembly 10 is located below the riveting power assembly. The rotor assembly 10 is provided with an inner hole 11. The expansion sleeve 21 is arranged in the inner hole 11. The inner support rod 22 is arranged in the expansion sleeve 21. The rotor fixing assembly is located below the rotor assembly 10. The rotor fixing assembly is connected with the rotor assembly 10. The upper end of the inner support rod 22 penetrates through the rotor fixing assembly. The lower end of the inner support rod 22 is arranged in the rotor fixing assembly.

[0045] Specifically, the rotor fixing assembly comprises a rotor fixing seat 30, a fixing seat mounting plate 40 and a base assembly. The rotor fixing seat 30 is connected below the rotor assembly 10. The fixing seat mounting plate 40 is connected below the rotor fixing seat 30. The rotor fixing seat 30 is provided with a first through hole 31. The fixing seat mounting plate 40 is provided with a second through hole 41. The lower end of the expansion sleeve 21 is arranged in the first through hole 31. The upper end of the inner support rod 22 penetrates through the second through hole 41, the first through hole 31 and the inner hole 11 in sequence. The lower end of the inner support rod 22 is arranged in the base assembly.

[0046] In the embodiment, the expansion sleeve 21 adopts a hollow structure. Under the action of the inner support rod 22, the expansion sleeve 21 is more likely to deform and the outer diameter increases. The cross section of the inner support rod 22 is isosceles trapezoidal, that is, the inner support rod 22 is circular truncated cone-shaped. The diameter gradually increases from top to bottom.

[0047] The rotor assembly 10 is placed below the riveting power assembly to ensure that the inner hole 11 is aligned with the expansion sleeve 21. At this time, the rotor assembly 10 can be easily placed and taken out because the outer diameter of the expansion sleeve 21 is smaller than the diameter of the inner hole 11 of the rotor assembly 10. There is a proper gap between the two.

[0048] The riveting power assembly is started. The pneumatic cylinder connecting plate 63 moves downward to drive the rivet head 60 to press against the rotor assembly 10 and push the rotor assembly 10, the rotor fixing seat 30 and the fixing seat mounting plate 40 to move downward together. In this process, the distance between the fixing seat mounting plate 40 and the base 50 gradually decreases.

[0049] With the downward movement of the fixing seat mounting plate 40, the inner support rod 22 is subjected to downward pressure, which causes the expansion sleeve 21 to expand outward under the action of the inner support rod 22. The outer diameter of the expansion sleeve 21 gradually increases to finally completely support the inner hole 11 of the rotor assembly 10 to prevent the deformation of the rotor assembly 10 during the riveting process.

[0050] When the fixed seat mounting plate 40 contacts the inductor on the base assembly, the inductor triggers a signal to stop the pneumatic cylinder connecting plate 63 from descending. At this time, the pneumatic plug gauge outer nozzle of the expansion sleeve 21, i.e. the side outer through hole 211, is aligned with the pneumatic plug gauge inner nozzle of the inner support rod 22, i.e. the side inner through hole 222, and the pneumatic gauge starts to work to measure the actual size of the inner hole 11 of the rotor assembly 10, thereby ensuring the riveting quality.

[0051] After riveting is completed, the pneumatic cylinder connecting plate 63 moves upward to release the pressure on the rotor assembly 10. Under the action of the elastic member 53, the rotor fixed seat 30, the fixed seat mounting plate 40, the rotor assembly 10 and the expansion sleeve 21 move upward together, the distance between the fixed seat mounting plate 40 and the base 50 gradually increases, and the expansion sleeve 21 returns to the initial state, thereby facilitating the extraction of the rotor assembly 10 and the installation of the next set of rotor assembly 10.

[0052] The device described above effectively reduces the deformation of the inner hole 11 of the rotor assembly 10 during riveting through the expansion of the expansion sleeve 21, thereby improving the consistency and reliability of the product. The size of the inner hole 11 is monitored in real time by using the pneumatic gauge to ensure that each riveting can meet the expected quality standard. The entire riveting process, from starting to measuring to resetting, can be automatically controlled, thereby improving the production efficiency and reducing human errors. The large initial gap between the expansion sleeve 21 and the inner hole 11 of the rotor assembly 10 reduces the wear caused by frequent assembly and disassembly during long-term use, thereby prolonging the service life of the equipment. The modular design makes it easy to replace and maintain each component, thereby simplifying the daily maintenance work.

[0053] In an embodiment, as shown in Figure 4 , the distance between the outer diameter of the expansion sleeve 21 and the diameter of the inner hole 11 is 0.015mm to 0.043mm. Specifically, the outer diameter of the expansion sleeve 21 is 12.845mm to 12.855mm, and the diameter of the inner hole 11 is 12.870mm to 12.888mm. Because the outer diameter of the expansion sleeve 21 is smaller than the diameter of the inner hole 11 of the rotor assembly 10, there is a proper gap between them, so the rotor assembly 10 can be easily placed and taken out.

[0054] In an embodiment, as shown in Figure 4 , the base assembly includes the base 50, a resetting assembly and a limiting assembly 54, the lower end of the inner support rod 22 is placed in the base 50, the middle of the base 50 is upwardly protruding to form a protrusion 56, the limiting assembly 54 is located on the protrusion 56, one end of the resetting assembly is connected with the base 50, and the other end of the resetting assembly is connected with the fixed seat mounting plate 40.

[0055] In the embodiment, the distance between the fixed seat mounting plate 40 and the base 50 specifically refers to the distance between the fixed seat mounting plate 40 and the protrusion 56 of the middle of the base 50 which is upwardly protruding.

[0056] The reset assembly is arranged on both sides of the protrusion 56. The base 50 serves as the basic structure of the entire device, providing stable support and integrating other key components. The protrusion 56 formed by the upward protrusion of the middle part is designed to better fit the installation of the limiting assembly 54. After completing a riveting action of the riveting power assembly, the reset assembly immediately comes into play, quickly restoring the fixed seat mounting plate 40, along with the rotor assembly 10, the rotor fixed seat 30, and the expansion mandrel 20, to the initial position, preparing for the next riveting. This design not only speeds up the production rhythm but also helps to maintain the relative positions between the components, ensuring the accuracy and consistency of each riveting. The main function of the limiting assembly 54 is to limit the maximum downward distance of the fixed seat mounting plate 40 during riveting, preventing excessive compression of the reset assembly and affecting the riveting quality. In addition, it also ensures the consistent position of the fixed seat mounting plate 40 during each riveting, thereby improving the processing accuracy of the product.

[0057] By introducing the optimized design of the base 50, reset assembly, and limiting assembly 54, the functionality and reliability of the rotor assembly riveting device are significantly enhanced. The protrusion 56 of the base 50 not only provides an ideal installation position for the limiting assembly 54 but also enhances the stability of the overall structure. The reset assembly ensures that the device can quickly and accurately reset, improving production efficiency. The limiting assembly 54 precisely controls the downward distance, ensuring the quality of riveting and the safe operation of the equipment.

[0058] In an embodiment, referring to Figure 4 The reset assembly described above includes a connecting rod 51, a guide sleeve 52, and a resilient member 53. The fixed seat mounting plate 40 is provided with a first mounting hole, and the base 50 is provided with a second mounting hole. One end of the connecting rod 51 is inserted into the first mounting hole, and the other end of the connecting rod 51 is inserted into the second mounting hole. The guide sleeve 52 is connected to the outer surface of the connecting rod 51, and the resilient member 53 is located on the outer surface of the guide sleeve 52. One end of the resilient member 53 abuts against the upper end surface of the base 50, and the other end of the resilient member 53 abuts against the lower end surface of the fixed seat mounting plate 40.

[0059] In this embodiment, the resilient member 53 includes but is not limited to a spring. There is a gap between the upper end surface of the base 50 (excluding the protrusion 56) and the lower end surface of the fixed seat mounting plate 40. The resilient member 53 is placed in this gap.

[0060] Specifically, the connecting rod 51 not only ensures the stable connection between the fixed seat mounting plate 40 and the base 50, but also provides effective support for the elastic member 53, enabling it to maintain linear motion during compression and release, avoiding deviation caused by lateral force. The main function of the guide sleeve 52 is to guide the linear motion of the connecting rod 51, ensuring smoothness and accuracy during the reset process, and also helping to protect the connecting rod 51 from external wear and tear.

[0061] When the fixed seat mounting plate 40 moves downward, the elastic member 53 will be compressed to store energy; when the external force is removed, the elastic member 53 will quickly release the energy, pushing the fixed seat mounting plate 40 back to the initial position, achieving rapid reset.

[0062] The gap between the upper end surface of the non-bulge 56 of the base 50 and the lower end surface of the fixed seat mounting plate 40 ensures that the elastic member 53 has enough travel space to perform optimally during compression and release. At the same time, it also avoids direct contact between the fixed seat mounting plate 40 and the base 50, reducing wear and noise.

[0063] In an embodiment, please refer to Figure 4 The riveting power assembly described above includes a riveting head 60, a guide plate 61, a mounting plate 62, and a pneumatic cylinder connecting plate 63. The pneumatic cylinder connecting plate 63 is connected to the mounting plate 62, the mounting plate 62 is connected to the guide plate 61, one end of the riveting head 60 is connected to the guide plate 61, and the other end of the riveting head 60 abuts against the upper end surface of the rotor assembly 10.

[0064] In this embodiment, the pneumatic cylinder connecting plate 63 is connected to the mounting plate 62, which is used to transmit power from the pneumatic cylinder to the entire riveting power assembly. The mounting plate 62 is connected to the guide plate 61, ensuring that the riveting head 60 moves accurately along the predetermined path during riveting. One end of the riveting head 60 is connected to the guide plate 61, and the other end abuts against the upper end surface of the rotor assembly 10, completing the riveting action. This structural design ensures that the power transmission path during riveting is clear and stable, and also guarantees the accuracy and reliability of riveting.

[0065] In an embodiment, please refer to Figure 4 The limiting component 54 described above includes a sensor. The function of the sensor is to detect the position information during riveting, ensuring that the riveting head 60 stops moving when it reaches the predetermined position, preventing damage caused by over-riveting.

[0066] In an embodiment, please refer to Figures 5 to 7 The inner support rod 22 is internally provided with a third through hole 221, and the inner support rod 22 is further provided with a side inner through hole 222, which communicates with the third through hole 221. The side of the expansion sleeve 21 is provided with a side outer through hole 211.

[0067] In an embodiment, the riveting device for a rotor assembly further comprises a measuring assembly, and the measuring assembly is connected with a pipe 70 inserted into the third through hole 221.

[0068] The central inner support rod 22 is provided with a main channel for guiding the gas or other medium to flow from the measuring device to the end of the inner support rod 22. The side inner through holes 222 are arranged on the side of the inner support rod 22 and are in communication with the third through hole 221. The side inner through holes 222 are designed to guide the gas to the side outer through holes 211 of the sleeve 21, and then the gas is discharged through the gap between the inner hole 11 of the rotor assembly 10 and the outer diameter of the sleeve 21. The side outer through holes 211 are arranged on the side of the sleeve 21, and when the riveting power assembly drives the rotor assembly 10, the sleeve 21, the rotor fixing seat 30 and the fixing seat mounting plate 40 to move downward to the position, that is, when the limiting assembly 54 senses the fixing seat mounting plate 40, the side outer through holes 211 correspond to and communicate with the side inner through holes 222 of the inner support rod 22. The design purpose of the side outer through holes 211 is to enable the gas to flow smoothly from the inside of the inner support rod 22 to the inner hole 11 of the rotor assembly 10, so as to achieve sensitive response to the change of the hole diameter.

[0069] The measuring assembly is mainly composed of a pneumatic gauge. When it is necessary to measure the size of the inner hole 11 of the rotor assembly 10, the pneumatic gauge is started, and the gas is introduced into the third through hole 221 of the inner support rod 22 through the pipe 70 of the measuring assembly. The gas flows along the third through hole 221, and then enters the side outer through holes 211 of the sleeve 21 through the side inner through holes 222 of the inner support rod 22. The gas is discharged through the side outer through holes 211 of the sleeve 21 and passes through the gap between the inner hole 11 of the rotor assembly 10 and the outer diameter of the sleeve 21. With the flow of the gas, if the diameter of the inner hole 11 of the rotor assembly 10 changes, it will cause the change of the gas flow path, and then affect the pressure or flow of the gas. The external pneumatic gauge detects the changes of the pressure or flow of the gas through a sensor, and the changes are converted into electrical signals through a gas-electric converter, and then processed by a single-chip microcomputer control system, so as to finally calculate the actual size of the inner hole 11 of the rotor assembly 10.

[0070] The structure indirectly measures the size of the inner hole 11 of the rotor assembly 10 through the change of the gas flow characteristics. This method can realize high-precision non-contact measurement and avoid the damage caused by traditional mechanical measurement. The measuring assembly can monitor the change of the hole diameter in real time during the riveting process, so as to discover abnormal conditions in time and improve the production efficiency and product quality. The system is suitable for different specifications and shapes of the rotor assembly 10, and only needs to adjust the corresponding parameter settings to meet different measurement requirements. The whole measurement process is highly automated, reduces manual intervention, reduces the operation difficulty and improves the work efficiency.

[0071] In summary, through the ingenious design of the inner support rod 22 and the measuring components, this embodiment not only achieves accurate measurement of the inner hole 11 of the rotor assembly 10, but also improves the automation level and measurement accuracy of the overall system, providing strong technical support for the production and quality control of the rotor assembly 10.

[0072] In one embodiment, the aforementioned limiting component 54 is mounted on the protrusion 56 by adjusting screws 55, so that the height of the limiting component 54 can be adjusted using adjusting screws 55.

[0073] In this embodiment, the entire device operates as follows:

[0074] Place the rotor assembly 10 on the rotor mounting base 30, ensuring its stable position and alignment with the expansion sleeve 21; insert the expansion sleeve 21 into the inner hole 11 of the rotor assembly 10, and start the riveting power assembly. The pneumatic cylinder connecting plate 63 drives the riveting head 60 downward, pressing the rotor assembly 10 downward; the rotor mounting base 30 and the mounting base mounting plate 40, along with the expansion sleeve 21, move downward together. At this time, the gap between the mounting base mounting plate 40 and the base 50 is ( Figure 4 The dimension A) gradually decreases. As the pressure increases, the expansion sleeve 21 gradually expands in the outer diameter direction, fully supporting the inner hole 11 of the rotor assembly 10 and reducing the deformation of the inner hole 11. When the fixed seat mounting plate 40 contacts the sensor on the base 50, the cylinder connected to the pneumatic cylinder connecting plate 63 receives the signal and stops descending. The elastic element 53 is gradually compressed. At this time, the outer nozzle of the pneumatic plug gauge of the expansion sleeve 21 and the inner nozzle of the pneumatic plug gauge of the inner support rod 22 coincide, and the pneumatic gauge starts to work, measuring the dimension of the inner hole 11 of the rotor assembly 10. Specifically, the pipe 70 of the measuring component is inserted into the third through hole 221 of the inner support rod 22, ensuring a tight and leak-free connection. The pneumatic gauge is turned on, and the gas enters the third through hole 221 of the inner support rod 22 through the pipe 70, and then exits through the side inner through hole 222 and the side outer through hole 211 of the expansion sleeve 21. The pneumatic gauge detects changes in gas pressure or flow rate, transmits the signal to the gas-to-electric converter, converts it into an electrical signal, and then transmits it to the microcontroller control system to calculate and record the initial aperture.

[0075] After the measurement is completed, the pipe 70 of the measuring component is pulled out from the third through hole 221 of the inner support rod 22.

[0076] When the riveting power assembly is activated, the pneumatic cylinder connecting plate 63 rises, and the riveting head 60 no longer contacts the rotor assembly 10. Under the action of the elastic element 53, the rotor fixing seat 30, the fixing seat mounting plate 40, the rotor assembly 10, and the expansion sleeve 21 rise, the value of dimension A gradually increases, the expansion sleeve 21 and the inner support rod 22 separate, and the outer diameter of the expansion sleeve 21 returns to its initial state.

[0077] The device effectively reduces the deformation of the inner hole 11 caused by riveting pressure by supporting the inner hole 11 of the rotor assembly 10 with the expandable sleeve 21 during riveting, ensuring the consistency of the inner diameter before and after riveting. After riveting is completed, the sleeve 21 returns to its original state under the action of the reset assembly, eliminating the interference fit with the inner hole 11 of the rotor assembly 10, making the rotor assembly 10 easy to remove and more labor-saving. The sleeve 21 adopts a hollow structure, which is easy to deform under the action of the inner support rod 22, thereby reducing wear and tear when the rotor assembly 10 is placed and removed, prolonging the service life of the tool mandrel 107. The measurement assembly can automatically measure the inner diameter of the rotor assembly 10 after riveting is completed, improving the convenience and accuracy of measurement.

[0078] Through the above design, the device of the embodiment not only ensures the consistency of the inner diameter of the rotor assembly 10 after riveting, but also simplifies the operation process, reduces the wear of the tool mandrel 107, and realizes efficient automatic measurement. By redesigning the rotor assembly 10 riveting equipment, the original mandrel 107 with a constant outer diameter is replaced by an expandable mandrel 20 with an outer diameter that can change according to pressure, ensuring the consistency of the inner diameter before and after riveting, and adding the rotor inner diameter measurement function, completing riveting and inner diameter measurement at one time.

[0079] The above-mentioned rotor assembly riveting device, through the design of the expandable mandrel 20, uses the combination of the sleeve 21 and the inner support rod 22 to avoid deformation of the rotor inner hole 11 during riveting. The sleeve 21 is placed in the rotor inner hole 11, and the inner support rod 22 provides additional support to ensure uniform distribution of riveting pressure and reduce the risk of inner hole 11 deformation. The design of the rotor fixing seat 30 and the fixing seat mounting plate 40 makes assembly more convenient and reduces assembly difficulty. The structure optimization of the inner support rod 22 and the sleeve 21 prevents wear of the mandrel 107 during use, improves durability, and solves the problems of existing motor rotor riveting devices in terms of inner hole 11 deformation, assembly difficulty, and tool mandrel 107 wear.

[0080] In another embodiment, please refer to Figures 8 to 13 The above-mentioned limiting assembly 54 includes a limiting block. In this embodiment, please refer to Figure 9 and Figure 13 The sleeve 21 is not provided with a side outer through hole 211, and the inner support rod 22 is not provided with a side outer through hole 211.

[0081] The rotor assembly 10 is placed in the same way as in the previous embodiment, placed on the fixing seat mounting plate 40, the sleeve 21 is placed in the inner hole 11 of the rotor assembly 10, and the inner support rod 22 is inserted into the sleeve 21. The fixing seat mounting plate 40 and the rotor fixing seat 30 are connected in turn to form a complete assembly unit.

[0082] When the riveting power assembly is started, the pneumatic cylinder connecting plate 63 moves downward under the pressure, driving the rivet head 60 to press the rotor assembly 10 to move downward. At the same time, the rotor fixing seat 30 and the fixing seat mounting plate 40 together with the expansion sleeve 21 also move downward. In this process, the distance between the fixing seat mounting plate 40 and the limiting block gradually decreases.

[0083] With the descent of the fixing seat mounting plate 40, the expansion sleeve 21 begins to expand under the action of the inner support rod 22, and its outer diameter gradually increases, eventually fully supporting the inner hole 11 of the rotor assembly 10. This design can significantly reduce the deformation of the inner hole 11 caused by pressure during riveting, ensuring the consistency of the inner diameter after riveting.

[0084] A limiting block is threadedly connected to the base 50, and by adjusting the height of the limiting block, the descent height of the fixing seat mounting plate 40 can be accurately controlled, thereby limiting the expansion degree of the expansion sleeve 21. This limiting mechanism ensures that the expansion of the expansion sleeve 21 is within a controllable range, further improving the riveting quality.

[0085] After riveting is completed, the pneumatic cylinder connecting plate 63 rises, and the rivet head 60 separates from the rotor assembly 10. Under the action of the elastic member 53, the rotor fixing seat 30, the fixing seat mounting plate 40, the rotor assembly 10, and the expansion sleeve 21 rise together, and the size A gradually returns to the initial state. At this time, the expansion sleeve 21 separates from the inner support rod 22, and the outer diameter of the expansion sleeve 21 returns to the initial state, facilitating the removal of the rotor assembly 10.

[0086] The device of this embodiment is equivalent to that of the previous embodiment, and the deformation of the inner hole 11 of the rotor assembly 10 during riveting is significantly reduced through the expansion support of the expansion sleeve 21 without side edges and outer through holes 211. Since there is no need to drill holes in the inner support rod 22 to connect with the measuring equipment, the processing is simpler and the cost is lower. The limiting block is used instead of the inductor, and the expansion degree of the expansion sleeve 21 is accurately controlled by mechanical limiting, reducing the requirement for precision. This scheme has no inner diameter measurement function and cannot perform 100% measurement monitoring on the riveted rotor assembly 10, which may require additional measurement steps to ensure product quality.

[0087] Therefore, it can be seen that this alternative scheme has obvious advantages in reducing the deformation of the inner hole 11, simplifying the processing, and reducing the cost, but has some shortcomings in the measurement function.

[0088] In an embodiment, a compressor including the above-mentioned rotor assembly riveting device is also provided. The problems of the motor rotor riveting device in the compressor of the prior art in terms of deformation of the inner hole 11, assembly difficulty, and wear of the tool mandrel 107 are solved.

[0089] The above merely describes a specific implementation of the present application, but the protection scope of the present application is not limited thereto, and any skilled person in the art can easily think of various equivalent modifications or replacements within the technical scope disclosed by the present application, and these modifications or replacements should be encompassed within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A rotor assembly riveting device characterized by, It comprises a rotor assembly, an expansion mandrel, a rotor fixing assembly and a riveting power assembly, the expansion mandrel comprises a sleeve and an inner support rod; the rotor assembly is located below the riveting power assembly, the rotor assembly is provided with an inner hole, the sleeve is placed in the inner hole, the inner support rod is inserted in the sleeve, the rotor fixing assembly is located below the rotor assembly, the rotor fixing assembly is connected with the rotor assembly, the upper end of the inner support rod penetrates through the rotor fixing assembly, and the lower end of the inner support rod is placed in the rotor fixing assembly. The distance between the outer diameter of the sleeve and the diameter of the inner hole is 0.015mm to 0.043mm.

2. A rotor assembly riveting device according to claim 1, wherein The rotor fixing assembly comprises a rotor fixing assembly, a fixing seat mounting plate and a base assembly, the rotor fixing seat is connected below the rotor assembly, and the fixing seat mounting plate is connected below the rotor fixing seat; the base assembly comprises a base, a reset assembly and a limiting assembly, the lower end of the inner support rod is placed in the base, the middle of the base is upwardly protruded to form a protruding block, the limiting assembly is located on the protruding block, one end of the reset assembly is connected with the base, and the other end of the reset assembly is connected with the fixing seat mounting plate.

3. A rotor assembly riveting device according to claim 2, wherein The reset assembly comprises a connecting rod, a guide sleeve and an elastic piece, the fixing seat mounting plate is provided with a first mounting hole, the base is provided with a second mounting hole, one end of the connecting rod is inserted in the first mounting hole, the other end of the connecting rod is inserted in the second mounting hole, the guide sleeve is connected to the outer surface of the connecting rod, and the elastic piece is located on the outer surface of the guide sleeve, one end of the elastic piece abuts against the upper end surface of the base, and the other end of the elastic piece abuts against the lower end surface of the fixing seat mounting plate.

4. A rotor assembly riveting device according to claim 3, wherein The riveting power assembly comprises a riveting head, a guide plate, a mounting plate and a pneumatic cylinder connecting plate, the pneumatic cylinder connecting plate is connected with the mounting plate, the mounting plate is connected with the guide plate, one end of the riveting head is connected with the guide plate, and the other end of the riveting head abuts against the upper end surface of the rotor assembly.

5. A rotor assembly riveting device according to claim 4, wherein The limiting assembly comprises an inductor.

6. A rotor assembly riveting device according to claim 4, wherein The inner support rod is provided with a third through hole, and is further provided with a side edge inner through hole, the side edge inner through hole is communicated with the third through hole, and the side edge of the sleeve is provided with a side edge outer through hole.

7. A rotor assembly riveting device according to claim 1 wherein, It further comprises a measuring assembly, the measuring assembly is connected with a pipeline, and the pipeline is inserted in the third through hole.

8. A rotor assembly riveting device according to claim 7, wherein The limiting assembly comprises a limiting block.

9. A rotor assembly riveting device according to claim 3, wherein It comprises the rotor assembly riveting device as claimed in any one of claims 1 to 9.

10. A compressor characterized by, ​

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