Rotor assembly riveting device and compressor

Abstract

The rotor assembly riveting device comprises a rotor assembly, an expansion mandrel, a rotor fixing assembly and a riveting power assembly, and the expansion mandrel comprises an expansion sleeve and an inner supporting 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, the problems of deformation of an inner hole, difficulty in assembly and wear of a tool mandrel of a motor rotor riveting device in the prior art can be solved.

Description

Technical Field

[0001] The present invention relates to the technical field of rotor assemblies, and in particular to a rotor assembly riveting device and a compressor. Background Art

[0002] In the manufacturing process of variable frequency compressor, the riveting of rotor assembly is a key process. The traditional riveting process uses Figures 1 to 3 In the structure shown, the inner hole of the rotor assembly is supported by the mandrel during riveting, and the upper part of the riveting device is pressed down under the action of hydraulic pressure to complete the riveting of the rivet. During the riveting process, the mandrel supports the inner hole of the rotor assembly to reduce the deformation of the inner hole of the rotor assembly during the riveting process. In order to facilitate employees to take and place the rotor assembly, when the inner diameter of the rotor assembly is 12.870+0.018, the outer diameter of the mandrel is designed according to 12.86±0.005mm, and there is a gap between the mandrel and the rotor assembly hole. On the other hand, as the number of riveting increases, the outer diameter of the mandrel gradually decreases with wear, and the gap between the mandrel and the inner hole of the rotor assembly gradually increases. Without the support of the mandrel, the deformation of the inner hole of the rotor assembly will increase. If the outer diameter of the mandrel is increased, the inner diameter gap between the mandrel and the rotor assembly becomes smaller, which will make it difficult to take and place the rotor assembly during riveting. In addition, the riveting equipment of the original scheme does not have the function of measuring the inner diameter of the rotor assembly, and it needs to be placed on the measuring device for 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, due to the high pressure of the riveting machine, the inner hole of the rotor assembly is prone to deformation. This deformation will cause the overall inner diameter of the rotor assembly to become smaller, resulting in poor assembly during the subsequent assembly with the crankshaft, seriously affecting the quality and performance of the compressor. As the inner diameter of the rotor assembly becomes smaller, the original clearance fit between the rotor assembly and the mandrel of the riveting equipment becomes an interference fit. This means that after the riveting is completed, it is difficult to smoothly remove the rotor assembly from the mandrel, which increases the difficulty and time cost of assembly. The tooling mandrel is prone to wear during the process of taking and placing the rotor assembly. As the mandrel wears, the deformation of the inner diameter of the rotor assembly after riveting will gradually increase, further exacerbating the assembly problem. In addition, frequent replacement or maintenance of the mandrel will also increase production costs. After riveting is completed, a measuring instrument is needed to measure the inner diameter of the rotor assembly to ensure that its size meets the requirements. However, this process is cumbersome and time-consuming, affecting production efficiency.

[0004] Chinese patent CN201320286004.1 discloses a motor rotor riveting device, the main invention of which is to use equipment to perform riveting instead of manual operation, and to complete the simultaneous riveting of 8 rivets on the motor rotor at one time. Although this device improves the riveting efficiency to a certain extent, it still fails to completely solve the above-mentioned problems of inner hole deformation, assembly difficulty, tooling mandrel wear and measurement inconvenience.

[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 mandrel wear. Summary of the invention

[0006] The purpose of the present invention is to overcome the defects of the prior art and provide a rotor assembly riveting device and a compressor.

[0007] To solve the above technical problems, the objective of the present invention is achieved through the following technical solutions: A rotor assembly riveting device is provided, comprising: a rotor assembly, an expansion mandrel, a rotor fixing assembly and a riveting power assembly, the expansion mandrel comprising 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 placed in the inner hole, the inner support rod is inserted in the expansion sleeve, the rotor fixing assembly is located below the rotor assembly, the rotor fixing assembly is connected to the rotor assembly, the upper end of the inner support rod passes through the rotor fixing assembly, and the lower end of the inner support rod is placed in the rotor fixing assembly.

[0008] A further technical solution is as follows: the distance between the outer diameter of the expansion sleeve and the diameter of the inner hole is 0.015 mm to 0.043 mm.

[0009] Its further technical solution is: the rotor fixing assembly includes a rotor fixing assembly, a fixing seat mounting plate and a base assembly, the rotor fixing seat is connected to the bottom of the rotor assembly, and the fixing seat mounting plate is connected to the bottom of the rotor fixing seat; the base assembly includes a base, a reset assembly and a limit assembly, the lower end of the inner support rod is placed in the base, the middle of the base protrudes upward to form a protrusion, the limit assembly is located on the protrusion, one end of the reset assembly is connected to the base, and the other end of the reset assembly is connected to the fixing seat mounting plate.

[0010] Its further technical solution is: the reset assembly includes a connecting rod, a guide sleeve and an elastic member, a first mounting hole is provided on the fixing seat mounting plate, a second mounting hole is provided on the base, 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 member is located on the outer surface of the guide sleeve, one end of the elastic member abuts against the upper end surface of the base, and the other end of the elastic member abuts against the lower end surface of the fixing seat mounting plate.

[0011] Its further technical solution is: the riveting power assembly includes a rivet head, a guide plate, a mounting plate and a pneumatic cylinder connecting plate, the pneumatic cylinder connecting plate is connected to the mounting plate, the mounting plate is connected to the guide plate, one end of the rivet head is connected to the guide plate, and the other end of the rivet head abuts against the upper end surface of the rotor assembly.

[0012] A further technical solution is: the limit assembly includes a sensor.

[0013] A further technical solution is as follows: a third through hole is provided in the inner support rod, a side inner through hole is further provided on the inner support rod, the side inner through hole is connected to the third through hole, and a side outer through hole is provided on the side of the expansion sleeve.

[0014] A further technical solution is: it also includes a measuring component, the measuring component is connected to a pipeline, and the pipeline is inserted in the third through hole.

[0015] A further technical solution is as follows: the limiting assembly includes a limiting block.

[0016] In addition, in order to overcome the defects of the prior art, the present invention also provides a compressor, including the above-mentioned rotor assembly riveting device.

[0017] The beneficial effects of the present invention compared with the prior art are as follows: the present invention avoids deformation of the inner hole of the rotor during riveting through the design of an expansion mandrel and the use of a combination of an expansion sleeve and an inner support rod. The expansion sleeve is placed in the inner hole of the rotor, and the inner support rod provides additional support to ensure that the riveting pressure is evenly distributed, thereby reducing the risk of deformation of the inner hole. The design of the rotor fixing seat and the fixing seat mounting plate makes assembly more convenient and reduces the difficulty of assembly. The optimization of the inner support rod and the expansion sleeve prevents wear of the mandrel during use, improves durability, and solves the problems of the motor rotor riveting device in the prior art in terms of inner hole deformation, assembly difficulty, and tooling mandrel wear.

[0018] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying any creative work.

[0020] Figure 1 It is a schematic diagram of the cross-section structure of the riveted structure of the prior art;

[0021] Figure 2 It is a schematic diagram of the cross-section structure of a mandrel in the prior art;

[0022] Figure 3 It is a schematic diagram of the cross-section structure of a rotor assembly in the prior art;

[0023] Figure 4 A schematic cross-sectional view of a rotor assembly riveting device provided by an embodiment of the present invention;

[0024] Figure 5 A schematic diagram of the cross-sectional structure of an expansion mandrel provided in an embodiment of the present invention;

[0025] Figure 6 A schematic diagram of the cross-sectional structure of an expansion sleeve provided in an embodiment of the present invention;

[0026] Figure 7 A schematic diagram of the cross-section structure of an inner support rod provided in an embodiment of the present invention;

[0027] Figure 8 A schematic cross-sectional view of a rotor assembly riveting device provided by another embodiment of the present invention;

[0028] Fig. 9 A schematic diagram of a cross-sectional structure of an expansion mandrel provided in another embodiment of the present invention;

[0029] Fig.10 A schematic diagram of the three-dimensional structure of an expansion sleeve provided in another embodiment of the present invention;

[0030] Fig.11 A schematic cross-sectional view of an expansion sleeve provided in another embodiment of the present invention;

[0031] Fig.12 A schematic diagram of the three-dimensional structure of an inner support rod provided in another embodiment of the present invention;

[0032] Fig.13 A schematic cross-sectional view of an inner support rod provided in another embodiment of the present invention;

[0033] Description of the symbols in the figure:

[0034] 10. Rotor assembly; 11. Inner hole; 20. Expansion mandrel; 21. Expansion sleeve; 211. External through hole on the side; 22. Inner support rod; 221. Third through hole; 222. Internal through hole on the side; 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. Bump; 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. Stripping plate pad; 106. Stripping plate; 107. Mandrel; 108. Guide column. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0036] It should be understood that when used in this specification and the appended claims, the terms "include" and "comprises" indicate the presence of described features, integers, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or combinations thereof.

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

[0038] It should be further understood that the term "and / or" used in the present description and the appended claims refers to any and all possible combinations of one or more of the associated listed items, 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 3 As 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 pad 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 difficulties 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 solution lacks the inner diameter measurement function and requires additional measurement, which affects production efficiency. There are also existing technologies that propose automated riveting equipment to improve riveting efficiency, but do not solve the problems of deformation of the inner hole 11 and inconvenient measurement. Frequent replacement of the mandrel 107 and time-consuming measurement process increase production costs and difficulty.

[0040] To this end, an embodiment of the present invention provides a rotor assembly riveting device to solve the problems of the motor rotor riveting device in the prior art in terms of deformation of the inner hole 11, difficulty in assembly, and wear of the tooling mandrel 107.

[0041] Specifically, the embodiment of the present invention mentions two solutions, one of which adopts an expansion mandrel 20 structure, in which the expansion sleeve 21 cooperates with the inner support rod 22 to effectively avoid deformation of the inner hole 11 during the riveting process; by accurately designing the outer diameter of the expansion sleeve 21 and the diameter of the inner hole 11, accurate matching during the riveting process is ensured to reduce assembly difficulties; a base assembly and a reset assembly are provided so that the inner support rod 22 can stably support the rotor assembly 10, reduce the wear of the mandrel 107 and improve the stability of the assembly; the elastic member 53 in the reset assembly can provide the necessary elastic support during the riveting process to prevent assembly difficulties caused by excessive stress; by adding a limit assembly 54 and a sensor, precise control of the riveting process is achieved to ensure the accuracy and quality of the riveting. In addition, a measuring device is also provided to directly measure the diameter of the inner hole 11 of the rotor assembly 10.

[0042] The difference between another solution and the previous solution is that this solution uses a combination of an expansion sleeve 21 without a measuring hole and an inner support rod 22 without a measuring hole. During riveting, the pneumatic cylinder presses down the rotor assembly 10 and expands the expansion sleeve 21 to support the inner hole 11 of the rotor. The riveted limit block is used to limit the degree of expansion and avoid excessive deformation. After riveting, the outer diameter of the expansion sleeve 21 returns to its initial state, but 100% measurement of the inner diameter of the rotor cannot be achieved. This solution is suitable for occasions with low precision requirements by simplifying processing and reducing costs.

[0043] In order to better understand the above technical solution, the above technical solution will be described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0044] See also Figures 4 to 7 The above-mentioned rotor assembly riveting device includes: a rotor assembly 10, an expansion mandrel 20, a rotor fixing assembly and a riveting power assembly, the expansion mandrel 20 includes 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 placed in the inner hole 11, the inner support rod 22 is inserted in the expansion sleeve 21, the rotor fixing assembly is located below the rotor assembly 10, the rotor fixing assembly is connected to the rotor assembly 10, the upper end of the inner support rod 22 passes through the rotor fixing assembly, and the lower end of the inner support rod 22 is placed in the rotor fixing assembly.

[0045] Specifically, the above-mentioned rotor fixing assembly includes: a rotor fixing seat 30, a fixing seat mounting plate 40 and a base assembly; wherein, the rotor fixing seat 30 is connected to the bottom of the rotor assembly 10, the fixing seat mounting plate 40 is connected to the bottom of the rotor fixing seat 30, a first through hole 31 is provided in the rotor fixing seat 30, a second through hole 41 is provided in the fixing seat mounting plate 40, the lower end of the expansion sleeve 21 is placed in the first through hole 31, the upper end of the inner support rod 22 passes through the second through hole 41, the first through hole 31 and the inner hole 11 in sequence, and the lower end of the inner support rod 22 is placed in the base assembly.

[0046] In this embodiment, the expansion sleeve 21 adopts a hollow structure, which is more likely to deform under the action of the inner support rod 22, and the outer diameter becomes larger. The cross-section of the inner support rod 22 is an isosceles trapezoid, that is, the inner support rod 22 is a truncated cone, and the diameter gradually increases from top to bottom.

[0047] Place the rotor assembly 10 under the riveted power assembly, ensuring that its inner hole 11 is aligned with the expansion sleeve 21. At this point, the rotor assembly 10 can be easily placed and removed because the outer diameter of the expansion sleeve 21 is smaller than the diameter of the inner hole 11 of the rotor assembly 10, and there is an appropriate gap between the two.

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

[0049] As the fixing seat mounting plate 40 moves downward, the inner support rod 22 is subjected to downward pressure, causing 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, and finally fully supports the inner hole 11 of the rotor assembly 10 to prevent it from deforming during the riveting process.

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

[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 fixing seat 30, the fixing seat mounting plate 40, the rotor assembly 10 and the expansion sleeve 21 move upward together, the distance between the fixing seat mounting plate 40 and the base 50 gradually increases, and the expansion sleeve 21 returns to the initial state, which facilitates the removal of the rotor assembly 10 and the installation of the next set of rotor assemblies 10.

[0052] The above-mentioned device effectively reduces the deformation of the inner hole 11 of the rotor assembly 10 during the riveting process through the expansion effect 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 using a pneumatic measuring instrument to ensure that each riveting can meet the expected quality standards. The entire riveting process, from startup to measurement to resetting, can be automated, improving production efficiency and reducing human errors. The larger initial gap between the expansion sleeve 21 and the inner hole 11 of the rotor assembly 10 reduces the wear caused by frequent loading and unloading during long-term use, extending the service life of the equipment. The modular design makes it easy to replace and maintain each component, simplifying daily maintenance work.

[0053] In one embodiment, see 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 an appropriate gap between the two, so the rotor assembly 10 can be easily placed and removed.

[0054] In one embodiment, see Figure 4 The above-mentioned base assembly includes a base 50, a reset assembly and a limit assembly 54. The lower end of the inner support rod 22 is placed in the base 50. The middle of the base 50 protrudes upward to form a protrusion 56. The limit assembly 54 is located on the protrusion 56. One end of the reset assembly is connected to the base 50, and the other end of the reset assembly is connected to the fixed seat mounting plate 40.

[0055] In this embodiment, the distance between the fixing seat mounting plate 40 and the base 50 mentioned above specifically refers to the distance between the fixing seat mounting plate 40 and the upwardly protruding block 56 in the middle of the base 50 .

[0056] Reset components are provided on both sides of the protrusion 56. As the basic structure of the entire device, the base 50 not only provides stable support, but also integrates other key components. The protrusion 56 formed by the upward protrusion in the middle is to better cooperate with the installation of the limit component 54; when the riveting power component completes a riveting action, the reset component will immediately take effect and quickly restore the fixed seat mounting plate 40 together with the rotor assembly 10, the rotor fixed seat 30 and the expansion mandrel 20 to the initial position, ready for the next riveting. This design not only speeds up the production rhythm, but also helps to keep the relative positions of the components unchanged, thereby ensuring the accuracy and consistency of each riveting. The main function of the limit component 54 is to limit the maximum downward distance of the fixed seat mounting plate 40 during the riveting process to prevent excessive compression of the reset component and cause damage or affect the riveting quality. In addition, it can also ensure that the position of the fixed seat mounting plate 40 is consistent each time the riveting is performed, thereby improving the processing accuracy of the product.

[0057] By introducing the optimized design of the base 50, the reset assembly and the limit 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 limit assembly 54, but also enhances the stability of the overall structure. The reset assembly ensures that the device can be reset quickly and accurately, improving production efficiency. The limit assembly 54 ensures the riveting quality and safe operation of the equipment by accurately controlling the downward distance.

[0058] In one embodiment, see Figure 4 The above-mentioned reset assembly includes a connecting rod 51, a guide sleeve 52 and an elastic member 53. A first mounting hole is provided on the fixed seat mounting plate 40, and a second mounting hole is provided on the base 50. 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 elastic member 53 is located on the outer surface of the guide sleeve 52. One end of the elastic member 53 abuts against the upper end surface of the base 50, and the other end of the elastic member 53 abuts against the lower end surface of the fixed seat mounting plate 40.

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

[0060] Specifically, the connecting rod 51 not only ensures a stable connection between the fixing seat mounting plate 40 and the base 50, but also provides effective support for the elastic member 53, so that it can maintain linear motion during compression and release, and avoid deviation caused by lateral force. The main function of the guide sleeve 52 is to guide the linear motion of the connecting rod 51, ensure the stability and accuracy during the reset process, and also help protect the connecting rod 51 from external wear.

[0061] When the fixing 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 fixing seat mounting plate 40 back to the initial position, thereby achieving rapid reset.

[0062] The gap between the upper end surface of the non-bump 56 of the base 50 and the lower end surface of the fixed seat mounting plate 40 ensures that the elastic member 53 has sufficient 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 one embodiment, see Figure 4 The above-mentioned riveting power assembly includes a rivet 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 rivet head 60 is connected to the guide plate 61, and the other end of the rivet 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 to transmit the power from the pneumatic cylinder to the entire riveting power assembly. The mounting plate 62 is connected to the guide plate 61 to ensure that the rivet head 60 moves accurately along the predetermined path during the riveting process. One end of the rivet head 60 is connected to the guide plate 61, and the other end abuts against the upper end surface of the rotor assembly 10 to complete the riveting action. This structural design ensures that the force transmission path during the riveting process is clear and stable, and also ensures the accuracy and reliability of the riveting.

[0065] In one embodiment, see Figure 4 The above-mentioned position limiting assembly 54 includes a sensor. The function of the sensor is to detect the position information during the riveting process, ensure that the rivet head 60 stops moving when it reaches the predetermined position, and prevent damage caused by excessive riveting.

[0066] In one embodiment, see Figures 5 to 7 The inner support rod 22 is provided with a third through hole 221 , and the inner support rod 22 is further provided with a side inner through hole 222 , the side inner through hole 222 is connected with the third through hole 221 , and the side of the expansion sleeve 21 is provided with a side outer through hole 211 .

[0067] In one embodiment, the above-mentioned rotor assembly riveting device further includes a measuring assembly, the measuring assembly is connected to a pipe 70 , and the pipe 70 is inserted into the third through hole 221 .

[0068] Located at the center of the inner support rod 22, it serves as the main channel to guide the gas or other media from the measuring device to the end of the inner support rod 22. The side inner through hole 222 is arranged on the side of the inner support rod 22 and is connected to the third through hole 221. The function of these side inner through holes 222 is to guide the gas to the side outer through hole 211 of the expansion sleeve 21, and then discharge it through the gap between the inner hole 11 of the rotor assembly 10 and the outer diameter of the expansion sleeve 21. The side outer through hole 211 is located on the side of the expansion sleeve 21. When the riveting power assembly pushes the rotor assembly 10, the expansion sleeve 21, the rotor fixing seat 30 and the fixing seat mounting plate 40 down to their positions, that is, after the limit assembly 54 senses the fixing seat mounting plate 40, the side outer through hole 211 corresponds to and is connected to the side inner through hole 222 of the inner support rod 22. The purpose of designing these side outer through holes 211 is to allow the gas to flow smoothly from the inside of the inner support rod 22 to the inner hole 11 of the rotor assembly 10, thereby achieving a sensitive response to the change of the hole diameter.

[0069] The measuring component is mainly composed of a pneumatic measuring instrument. When it is necessary to measure the size of the inner hole 11 of the rotor assembly 10, the pneumatic measuring instrument 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 component. The gas flows along the third through hole 221, and then enters the side outer through hole 211 of the expansion sleeve 21 through the side inner through hole 222 of the inner support rod 22. The gas is discharged through the side outer through hole 211 of the expansion sleeve 21 and passes through the gap between the inner hole 11 of the rotor assembly 10 and the outer diameter of the expansion sleeve 21. As the gas flows, if the diameter of the inner hole 11 of the rotor assembly 10 changes, it will cause the gas flow path to change, thereby affecting the pressure or flow of the gas. The external pneumatic measuring instrument detects the changes in the pressure or flow of the gas through a sensor. These changes are converted into electrical signals through a gas-to-electric converter, and then processed by the single-chip control system, and finally the actual size of the inner hole 11 of the rotor assembly 10 is calculated.

[0070] This structure indirectly measures the size of the inner hole 11 of the rotor assembly 10 through changes in gas flow characteristics. This method can achieve high-precision non-contact measurement and avoid damage that may be caused by traditional mechanical measurement. The measuring component can monitor the aperture changes during the riveting process in real time, detect abnormal conditions in time, and improve production efficiency and product quality. The system is suitable for rotor assemblies 10 of different specifications and shapes, and different measurement requirements can be met by adjusting the corresponding parameter settings. The entire measurement process is highly automated, reducing manual intervention, reducing the difficulty of operation, and improving work efficiency.

[0071] In summary, through the ingenious design of the inner support rod 22 and the measuring assembly, this embodiment not only realizes the precise measurement of the size 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 above-mentioned limiting assembly 54 is installed on the protrusion 56 through an adjusting screw 55 , so that the height of the limiting assembly 54 can be adjusted by using the adjusting screw 55 .

[0073] In this embodiment, the working process of the whole device is as follows:

[0074] Place the rotor assembly 10 on the rotor fixing seat 30, ensuring that its position is stable and aligned with the expansion sleeve 21; insert the expansion sleeve 21 into the inner hole 11 of the rotor assembly 10, start the riveting power assembly, and the pneumatic cylinder connecting plate 63 drives the rivet head 60 to move downward, and the rivet head 60 presses the rotor assembly 10 to move downward; the rotor fixing seat 30 and the fixing seat mounting plate 40 move downward together with the expansion sleeve 21, at this time, the clearance value between the fixing seat mounting plate 40 and the base 50 ( Figure 4 The dimension A) in the expansion sleeve 21 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 receiving signal connected to the pneumatic cylinder connecting plate 63 stops descending. The elastic member 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 with each other, and the pneumatic measuring instrument starts to work to measure the size of the inner hole 11 of the rotor assembly 10. Specifically, insert the pipe 70 of the measuring assembly into the third through hole 221 of the inner support rod 22 to ensure a tight connection without leakage. Turn on the pneumatic measuring instrument, and the gas enters the third through hole 221 of the inner support rod 22 through the pipe 70, and then is discharged through the side inner through hole 222 and the side outer through hole 211 of the expansion sleeve 21. The pneumatic meter detects changes in gas pressure or flow, transmits the signal to the gas-to-electric converter, converts it into an electrical signal and 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 assembly is pulled out from the third through hole 221 of the inner support rod 22 .

[0076] Start the riveting power assembly, the pneumatic cylinder connecting plate 63 rises, and the rivet head 60 is no longer in contact with 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, the value of the dimension A gradually increases, the expansion sleeve 21 and the inner support rod 22 are separated, and the outer diameter of the expansion sleeve 21 returns to the initial state.

[0077] The device uses an expandable expansion sleeve 21 to support the inner hole 11 of the rotor assembly 10 during the riveting process, which effectively reduces the deformation of the inner hole 11 caused by the riveting pressure and ensures the consistency of the inner diameter before and after riveting. After the riveting is completed, the expansion sleeve 21 returns to its initial state under the action of the reset component, 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 to operate. The expansion sleeve 21 adopts a hollow structure, which is easy to deform under the action of the inner support rod 22, thereby reducing wear when taking and placing the rotor assembly 10 and extending the service life of the tooling core shaft 107. A measuring component is set up to automatically measure the inner diameter of the rotor assembly 10 after the riveting is completed, thereby improving the convenience and accuracy of the measurement.

[0078] Through the above design, the device of this 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 tooling mandrel 107, and realizes efficient automatic measurement. By redesigning the riveting equipment of the rotor assembly 10, the original mandrel 107 with a constant outer diameter is replaced with an expansion mandrel 20 whose outer diameter can change according to the pressure, the consistency of the inner diameter before and after riveting is ensured, and the rotor inner diameter measurement function is added, so that riveting and inner diameter measurement are completed at one time.

[0079] The above-mentioned rotor assembly riveting device, through the design of the expansion mandrel 20, adopts the combination of the expansion sleeve 21 and the inner support rod 22, so as to avoid the deformation of the rotor inner hole 11 during the riveting process. The expansion sleeve 21 is placed in the rotor inner hole 11, and the inner support rod 22 provides additional support to ensure that the riveting pressure is evenly distributed, thereby reducing the risk of deformation of the inner hole 11; the design of the rotor fixing seat 30 and the fixing seat mounting plate 40 makes assembly more convenient and reduces the difficulty of assembly. The structural optimization of the inner support rod 22 and the expansion sleeve 21 prevents the wear of the mandrel 107 during use, improves durability, and solves the problems existing in the prior art of the motor rotor riveting device in terms of deformation of the inner hole 11, difficulty in assembly, and wear of the tooling mandrel 107.

[0080] In another embodiment, see Figures 8 to 13 The above-mentioned limiting assembly 54 includes a limiting block. In this embodiment, please refer to Fig. 9 and Fig.13 The expansion 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 manner as in the previous embodiment, and is placed on the fixed seat mounting plate 40, the expansion sleeve 21 is placed in the inner hole 11 of the rotor assembly 10, and the inner support rod 22 is inserted into the expansion sleeve 21. The fixed seat mounting plate 40 and the rotor fixed seat 30 are connected in sequence 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 downward. At the same time, the rotor fixing seat 30 and the fixing seat mounting plate 40 move downward together with the expansion sleeve 21. In this process, the distance between the fixing seat mounting plate 40 and the limit block gradually decreases.

[0083] As the fixing seat mounting plate 40 descends, the expansion sleeve 21 begins to expand under the action of the inner support rod 22, and its outer diameter gradually increases, and finally completely supports 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 the riveting process, and ensure the consistency of the inner diameter after riveting.

[0084] A limit block is threadedly connected to the base 50. By adjusting the height of the limit block, the descending height of the fixing seat mounting plate 40 can be accurately controlled, thereby limiting the expansion degree of the expansion sleeve 21. This limit mechanism ensures that the expansion amount 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 is separated 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 dimension A gradually returns to the initial state. At this time, the expansion sleeve 21 is separated from the inner support rod 22, and the outer diameter of the expansion sleeve 21 returns to the initial state, which facilitates the removal of the rotor assembly 10.

[0086] The device of this embodiment is equivalent to the device of the previous embodiment. The expansion support of the expansion sleeve 21 without the side external through hole 211 significantly reduces the deformation of the inner hole 11 of the rotor assembly 10 during the riveting process. Since there is no need to open a hole in the inner support rod 22 to connect with the measuring equipment, the processing is simpler and the cost is lower. The use of limit blocks instead of sensors can accurately control the expansion degree of the expansion sleeve 21 through mechanical limit methods, reducing the requirements for accuracy. This solution does not have an inner diameter measurement function, and cannot perform 100% measurement and monitoring of the rotor assembly 10 after riveting. Additional measurement steps may be required to ensure product quality.

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

[0088] In one embodiment, a compressor is provided, comprising the above-mentioned rotor assembly riveting device, so as to solve the problems of the motor rotor riveting device in the compressor in the prior art in terms of inner hole 11 deformation, assembly difficulty, and tooling mandrel 107 wear.

[0089] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed by the present invention, and these modifications or replacements should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention shall be based on the protection scope of the claims.

Claims

1. A rotor assembly riveting device, characterized in that: include: A rotor assembly, an expansion mandrel, a rotor fixing assembly and a riveting power assembly, wherein the expansion mandrel includes 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 placed in the inner hole, the inner support rod is inserted in the expansion sleeve, the rotor fixing assembly is located below the rotor assembly, the rotor fixing assembly is connected to the rotor assembly, the upper end of the inner support rod passes through the rotor fixing assembly, and the lower end of the inner support rod is placed in the rotor fixing assembly.

2. A rotor assembly riveting device according to claim 1, characterized in that: The distance between the outer diameter of the expansion sleeve and the diameter of the inner hole is 0.015 mm to 0.043 mm.

3. A rotor assembly riveting device according to claim 2, characterized in that: The rotor fixing assembly includes a rotor fixing assembly, a fixing seat mounting plate and a base assembly, wherein the rotor fixing seat is connected to the bottom of the rotor assembly, and the fixing seat mounting plate is connected to the bottom of the rotor fixing seat; the base assembly includes a base, a reset assembly and a limit assembly, the lower end of the inner support rod is placed in the base, the middle of the base protrudes upward to form a protrusion, the limit assembly is located on the protrusion, one end of the reset assembly is connected to the base, and the other end of the reset assembly is connected to the fixing seat mounting plate.

4. A rotor assembly riveting device according to claim 3, characterized in that: The reset assembly includes a connecting rod, a guide sleeve and an elastic member. The fixed 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 member is located on the outer surface of the guide sleeve. One end of the elastic member abuts against the upper end surface of the base, and the other end of the elastic member abuts against the lower end surface of the fixed seat mounting plate.

5. A rotor assembly riveting device according to claim 4, characterized in that: The riveting power assembly includes a rivet head, a guide plate, a mounting plate and a pneumatic cylinder connecting plate, the pneumatic cylinder connecting plate is connected to the mounting plate, the mounting plate is connected to the guide plate, one end of the rivet head is connected to the guide plate, and the other end of the rivet head abuts against the upper end surface of the rotor assembly.

6. A rotor assembly riveting device according to claim 4, characterized in that: The limiting component includes a sensor.

7. A rotor assembly riveting device according to claim 1, characterized in that: The inner support rod is provided with a third through hole, and the inner support rod is also provided with a side inner through hole, the side inner through hole is communicated with the third through hole, and the side of the expansion sleeve is provided with a side outer through hole.

8. A rotor assembly riveting device according to claim 7, characterized in that: It also includes a measuring component, which is connected to a pipeline, and the pipeline is inserted in the third through hole.

9. A rotor assembly riveting device according to claim 3, characterized in that: The limiting assembly comprises a limiting block.

10. A compressor, characterized in that: It comprises a rotor assembly riveting device as claimed in any one of claims 1 to 9.

Images