Positioning structure for machining axial flow fan shell

Abstract

The invention provides a positioning structure for axial flow fan shell machining, and belongs to the technical field of axial flow fan machining. Comprising a mounting base, air cylinders which are evenly distributed are symmetrically mounted on the two sides of the mounting base, first clamping plates are fixedly connected to the tail ends of the air cylinders, second clamping plates are arranged between the adjacent first clamping plates, the outer sides of the second clamping plates are sleeved with movable frames, and buffer rollers are symmetrically mounted in the movable frames; and telescopic columns which are uniformly distributed are arranged on the movable frame in a sleeving manner. By arranging the first clamping plate, the second clamping plate, the buffering roller and the buffering assembly, the axial flow fan shell can be effectively buffered and protected in the clamping and positioning process of the axial flow fan shell, damage to the axial flow fan shell in the positioning process can be avoided, and the service life of the axial flow fan shell is prolonged. And a wrapping and clamping state can be formed, the stability after clamping and positioning is guaranteed, and convenience is provided for machining operation of the axial flow fan shell.

Description

Technical Field

[0001] The invention relates to the technical field of axial flow fan processing, and in particular to a positioning structure used for processing an axial flow fan shell. Background Art

[0002] The axial flow fan casing needs to be precisely positioned and clamped during the processing to ensure processing accuracy and stability. During the processing, the key dimensions of the axial flow fan casing such as roundness, coaxiality, and welding accuracy have high requirements to ensure smooth airflow, low noise, and high efficiency when the fan is running.

[0003] However, since the shell structure is mostly thin-walled and has low rigidity, it is easy to cause deformation or surface damage due to excessive clamping force during the traditional mechanical clamping process, affecting the final assembly accuracy and service life. Traditional clamping and positioning structures usually use rigid clamps, such as mechanical chucks, hydraulic clamping devices, etc. Although they can provide a stable fixing effect, they are easy to cause damage to the shell surface due to rigid contact during the clamping process, especially for fan shells with thin walls or high surface accuracy requirements. Excessive clamping force may cause deformation or scratches, affecting the quality of the final product. In addition, when processing different positions, it is usually necessary to loosen the clamp and manually adjust the shell angle, or rely on an additional rotation drive mechanism, which not only increases the complexity of the operation, but also reduces the processing efficiency. The existing rotation positioning structure is often complex in structure, and it is difficult to achieve a good balance between clamping and rotation functions, resulting in an inflexible processing process. Therefore, the present application provides a positioning structure for axial flow fan shell processing to meet the needs. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a positioning structure for processing an axial flow fan housing to solve the problem that the existing positioning structure is easy to cause damage to the axial flow fan housing and it is difficult to achieve a good balance between the clamping and rotation functions during processing.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions: A positioning structure for processing an axial flow fan casing comprises a mounting seat, cylinders that are evenly distributed are symmetrically mounted on both sides of the mounting seat, first clamping plates are fixedly connected to the ends of the cylinders, a second clamping plate is arranged between adjacent first clamping plates, a movable frame is sleeved on the outer side of the second clamping plate, buffer rollers are symmetrically mounted in the movable frame, and evenly distributed telescopic columns are sleeved on the movable frame; a buffer assembly is used for buffering when the first clamping plate and the second clamping plate are clamping, and the buffer assembly is connected to the first clamping plate; a reinforcement assembly is used for reinforcement when the first clamping plate and the second clamping plate are clamping, and the reinforcement assembly is connected to the telescopic column.

[0006] Optionally, evenly distributed electric telescopic rods are fixedly connected to the mounting seat, and a lifting platform is fixedly connected to the top of the electric telescopic rods, and the lifting platform is located below the cylinder.

[0007] Optionally, an elastic sheet is fixedly connected between the first clamping plate and the second clamping plate, the elastic sheet is wavy in shape, and a connecting seat located outside the elastic sheet is fixedly connected to both the first clamping plate and the second clamping plate.

[0008] Optionally, a connecting rod is sleeved between adjacent connecting seats, both ends of the connecting rod are sleeved in the connecting seats, and the connecting rod and the connecting seat are movably connected via a rotating shaft.

[0009] Optionally, the cross-section of the movable frame is U-shaped, the telescopic columns are distributed at the edge of the opening of the movable frame, the second clamping plate is provided with a socket, the movable frame is sleeved in the socket, and the movable frame is fixedly connected between the second clamping plates with evenly distributed first springs.

[0010] Optionally, a servo motor located between the buffer rollers is fixedly connected in the movable frame, the buffer rollers and the movable frame are movably connected via bearings, and the drive shaft of the servo motor and the buffer rollers are associated and connected via synchronous wheels and synchronous belts.

[0011] Optionally, the second clamping plate is provided with an escape opening adapted to the size of the servo motor, the synchronous wheel and the synchronous belt, and the second clamping plate is provided with a positioning groove adapted to the external shape of the buffer drum.

[0012] Optionally, the buffer assembly includes a buffer pad fixedly connected to the outside of the first clamping plate, the buffer pad has a trapezoidal cross-section, and a weakened groove is provided on the inner side wall of the buffer pad, and the first clamping plate is fixedly connected to the outside of a first support frame located on the inner side of the buffer pad.

[0013] Optionally, the reinforcement assembly includes a pressure head and a pressure plate fixedly connected to both ends of the telescopic column, the pressure head is located on the inner side of the movable frame, and a second spring is fixedly connected between the pressure head and the inner side wall of the movable frame, and the pressure plate is located on the outer side of the movable frame.

[0014] Optionally, a limit frame located between the pressure heads is fixedly connected to the inner side of the movable frame, an extrusion plate is symmetrically installed on the outside of the limit frame, an extrusion surface is provided on the outside of the extrusion plate, a pressure-bearing surface matched with the shape of the extrusion surface is provided on the outside of the pressure head, a pressure support plate is fixedly connected to the side of the extrusion plate away from the extrusion surface, and a second support frame supporting the pressure support plate is fixedly connected to the inner side of the limit frame.

[0015] Compared with the prior art, the present invention has at least the following beneficial effects: In the above scheme, by setting the first clamping plate and the second clamping plate as well as the buffer roller and the buffer assembly, the axial flow fan casing can be effectively buffered and protected during the process of clamping and positioning the axial flow fan casing, which can avoid damage to the axial flow fan casing during the positioning process, and can form a wrapped clamping state to ensure stability after clamping and positioning, thereby providing convenience for the processing operation of the axial flow fan casing.

[0016] By setting up a second clamping plate, a movable frame and a buffer roller, the positioning structure can maintain the clamping state of the axial flow fan housing through a small range of contraction of the cylinder after achieving clamping positioning, but unlock the buffer roller, so that the buffer roller can be driven by the servo motor to rotate and drive the axial flow fan housing to rotate, thereby changing the clamping position of the axial flow fan housing, so that the axial flow fan housing can be flexibly rotated and adjusted according to the needs of the processing flow.

[0017] By providing a second clamping plate, a movable frame and a reinforcement component, while the positioning structure realizes the clamping and positioning of the axial flow fan housing, the relative displacement between the second clamping plate and the movable frame also drives the reinforcement component to work, forming a pressure limit on the flange edge of the axial flow fan housing, and strengthening the working effects of the first clamping plate, the second clamping plate and the buffer roller, thereby further enhancing the stability of the entire positioning structure in clamping and fixing the axial flow fan housing.

[0018] By providing a limit frame, an extrusion plate and a second support frame in the reinforcement component, the reinforcement component can not only perform the work of pressing and limiting the flange edge of the axial flow fan housing, but also control the extrusion force of the reinforcement component on the flange edge through the deformation of the extrusion plate and the second support frame, thereby avoiding excessive extrusion of the flange edge by the reinforcement component and causing damage to the axial flow fan housing, which echoes the function of the buffer component and improves the technical solution of the entire positioning structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings, which are incorporated herein and constitute a part of the specification, illustrate embodiments of the invention and, together with the description, further serve to explain the principles of the invention and to enable those skilled in the relevant art to make and use the invention.

[0020] Figure 1 It is a three-dimensional structural schematic diagram of a positioning structure used for processing an axial flow fan housing; Figure 2 It is a schematic diagram of the first-view structure of the positioning structure used for machining the axial flow fan housing; Figure 3 A second perspective structural schematic diagram of a positioning structure used for machining an axial flow fan housing; Figure 4 It is a schematic diagram of the matching structure of the cylinder, the first clamping plate and the second clamping plate; Figure 5 It is a schematic diagram of the three-dimensional structure of the first clamping plate and the second clamping plate; Figure 6 for Figure 5 The enlarged structural diagram at A in the middle; Figure 7 for Figure 5 The enlarged structural diagram at B in the middle; Figure 8 It is a schematic diagram of the three-dimensional structure of the movable frame; Fig. 9 It is a schematic diagram of the three-dimensional structure of the pressure head and the pressure plate; Fig.10 It is a schematic diagram of the coordination structure between the limit frame and the pressure head.

[0021] Reference numerals: 1. Mounting seat; 2. Electric telescopic rod; 3. Lifting platform; 4. Cylinder; 5. First clamping plate; 6. Second clamping plate; 7. Movable frame; 8. Buffer roller; 9. Buffer pad; 10. Elastic sheet; 11. Telescopic column; 12. Limiting frame; 13. Socket; 14. Avoidance; 15. Positioning groove; 16. Weakened groove; 17. First support frame; 18. Connecting seat; 19. Connecting rod; 20. Rotating shaft; 21. Servo motor; 22. Synchronous wheel; 23. Synchronous belt; 24. First spring; 25. Pressure head; 26. Pressure plate; 27. Second spring; 28. Pressure surface; 29. ​​Extrusion plate; 30. Extrusion surface; 31. Second support frame; 32. Pressure support plate.

[0022] As shown in the figure, in order to clearly implement the structure of the embodiment of the present invention, specific structures and devices are marked in the figure, but this is only for illustrative purposes and is not intended to limit the present invention to the specific structure, device and environment. According to specific needs, ordinary technicians in this field can adjust or modify these devices and environments. DETAILED DESCRIPTION

[0023] The following is a detailed description of a positioning structure for machining an axial flow fan housing provided by the present invention in conjunction with the accompanying drawings and specific embodiments. At the same time, it is explained here that in order to make the embodiments more detailed, the following embodiments are the best and preferred embodiments, and those skilled in the art may also adopt other alternative methods to implement some known technologies; and the accompanying drawings are only for a more specific description of the embodiments, and are not intended to specifically limit the present invention.

[0024] It should be noted that the references to "one embodiment", "embodiment", "exemplary embodiments", "some embodiments" and the like in the specification indicate that the embodiments described may include specific features, structures or characteristics, but not every embodiment may include the specific features, structures or characteristics. In addition, when a specific feature, structure or characteristic is described in conjunction with an embodiment, it should be within the knowledge of a person skilled in the art to implement such feature, structure or characteristic in conjunction with other embodiments (whether or not explicitly described).

[0025] In general, a term can be understood, at least in part, from its use in context. For example, depending, at least in part, on the context, the term "one or more" as used herein can be used to describe any feature, structure, or characteristic in the singular sense, or can be used to describe a combination of features, structures, or characteristics in the plural sense. Additionally, the term "based on" can be understood as not necessarily intended to convey an exclusive set of factors, but can instead, depending, at least in part, on the context, allow for the presence of other factors that are not necessarily explicitly described.

[0026] It will be understood that the meanings of “on,” “over,” and “above” in the present invention should be interpreted in the broadest manner, so that “on” not only means “directly on” something, but also includes the meaning of being “on” something with intervening features or layers therebetween, and “on” or “over” not only means “on” or “above” something, but also includes the meaning of being “on” or “above” something with no intervening features or layers therebetween.

[0027] Additionally, spatially relative terms such as "under," "beneath," "lower," "above," "upper," and the like may be used herein for descriptive convenience to describe the relationship of one element or feature to another element or features, as shown in the accompanying drawings. Spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the accompanying drawings. The device may be oriented in other ways, and the spatially relative descriptors used herein may be similarly interpreted accordingly.

[0028] like Figures 1 to 10As shown, an embodiment of the present invention provides a positioning structure for processing an axial flow fan casing, comprising a mounting seat 1, on both sides of which are symmetrically mounted evenly distributed cylinders 4, the mounting seat 1 is fixedly connected with evenly distributed electric telescopic rods 2, the top of the electric telescopic rods 2 is fixedly connected with a lifting platform 3, the lifting platform 3 is located below the cylinders 4, the lifting platform 3 is used to place the casing of the axial flow fan to be processed, the electric telescopic rod 2 can drive the lifting platform 3 to move up and down through its driving rod when working, and then change the height of the axial flow fan casing between the cylinders 4, so that the cylinder 4 is corresponding to the middle position of the casing of the axial flow fan, so as to facilitate the subsequent cylinder 4 to drive other mechanisms to move, and clamp and position the axial flow fan casing on the lifting platform 3 to ensure the accuracy of its processing position.

[0029] The end of the cylinder 4 is fixedly connected with a first clamping plate 5, and a second clamping plate 6 is arranged between adjacent first clamping plates 5. A movable frame 7 is sleeved on the outer side of the second clamping plate 6, and a buffer roller 8 is symmetrically installed in the movable frame 7. The movable frame 7 is sleeved with evenly distributed telescopic columns 11. The first clamping plate 5 and the second clamping plate 6 are the main structures for clamping and positioning the axial flow fan housing. The cylinder 4 works to push the displacement of the first clamping plate 5, driving the second clamping plate 6 to approach the outside of the axial flow fan housing. The cylinder 4 and the first clamping plate 5 are arranged on the outer side of the axial flow fan housing. The holding plate 5 and the second clamping plate 6 cooperate to clamp and position the axial flow fan housing, and determine the processing position of the axial flow fan housing. When the second clamping plate 6 follows the first clamping plate 5 to clamp and position the axial flow fan housing, the movable frame 7 follows the second clamping plate 6 to generate displacement, and the edge of the buffer roller 8 in the movable frame 7 is outside the movable frame 7, which can form a barrier between the second clamping plate 6 and the movable frame 7 and the axial flow fan housing, replacing the second clamping plate 6 and the movable frame 7 to clamp and position the axial flow fan housing; A buffer component is used for buffering when the first clamping plate 5 and the second clamping plate 6 are clamping. The buffer component is connected to the first clamping plate 5. The setting of the buffer component can prevent the first clamping plate 5 from rigidly contacting with the outside of the axial flow fan housing during the clamping and positioning process, thereby causing damage to the axial flow fan housing; a reinforcement component is used for reinforcement when the first clamping plate 5 and the second clamping plate 6 are clamping. The reinforcement component is connected to the telescopic column 11 and can be started at the same time when the positioning structure as a whole contacts with the outside of the axial flow fan housing and generates pressure, and forms a pressure limit at the flange edge of the axial flow fan housing, thereby increasing the contact points between the positioning structure and the axial flow fan housing, dispersing the stress of various parts of the axial flow fan housing in the clamping and positioning state, thereby ensuring the stability of the axial flow fan housing after being clamped and positioned without causing damage to the axial flow fan housing.

[0030] In this embodiment, if Figures 1 to 7As shown, an elastic sheet 10 is fixedly connected between the first clamping plate 5 and the second clamping plate 6. The elastic sheet 10 is wavy, and the thickness of the elastic sheet 10 is less than the thickness of the first clamping plate 5 and the second clamping plate 6. With its wavy structure, it has good deformation ability and can be deformed after being subjected to external force, so that the first clamping plate 5 and the second clamping plate 6 can be offset and movable with each other, and adapt to the external shape of the axial flow fan housing during the clamping and positioning process. The first clamping plate 5 and the second clamping plate 6 are both fixedly connected with a plurality of elastic sheets located on the elastic sheet. 10, a connecting seat 18 on the outside, a connecting rod 19 is sleeved between adjacent connecting seats 18, both ends of the connecting rod 19 are sleeved in the connecting seat 18, and the connecting rod 19 and the connecting seat 18 are movably connected through a rotating shaft 20. When the cylinder 4 is working, it can drive the first clamping plate 5 and the second clamping plate 6 to clamp and position the outside of the axial flow fan housing. The first clamping plate 5 and the second clamping plate 6 can be offset to form a wrap around the outside of the axial flow fan housing, thereby generating more clamping points to ensure the clamping and positioning effect. The connecting seat 18, the connecting rod 19 and the rotating shaft 20 are connected to the connecting seat 18. The associated connection between the shafts 20 can form a range limit for the relative displacement of the first clamping plate 5 and the second clamping plate 6. During the process of the first clamping plate 5 and the second clamping plate 6 being clamped and positioned and offset under the drive of the cylinder 4, the connecting rod 19 and the connecting seat 18 are also correspondingly deflected to adapt to the offset of the first clamping plate 5 and the second clamping plate 6, but the deformation of the elastic sheet 10 is not too large. The connecting seat 18 and the connecting rod 19 will not be deformed during the deflection process, thereby effectively limiting the deflection range of the first clamping plate 5 and the second clamping plate 6, and also making The first clamping plate 5 can effectively drive the second clamping plate 6 to approach the outside of the axial flow fan housing under the thrust of the cylinder 4, and then after the buffer roller 8 is fitted to the outside of the axial flow fan housing, it can also generate corresponding extrusion force to clamp and position the axial flow fan housing. After the processing of the axial flow fan housing is completed, when the cylinder 4 drives the first clamping plate 5 and the second clamping plate 6 away from the axial flow fan housing, the elastic sheet 10 can drive the relative position of the first clamping plate 5 and the second clamping plate 6 to return to the initial state under the action of its own elastic force.

[0031] In this embodiment, if Figures 2 to 8As shown, the cross section of the movable frame 7 is U-shaped, the telescopic columns 11 are distributed at the edge of the opening of the movable frame 7, the second clamping plate 6 is provided with a socket 13, the movable frame 7 is sleeved in the socket 13, and the movable frame 7 is fixedly connected with uniformly distributed first springs 24 between the second clamping plate 6, the movable frame 7 is sleeved on the outside of the second clamping plate 6 through the socket 13, and is associated with the movable frame 7 through the first spring 24. When the movable frame 7 is not subjected to external force, the first spring 24 is in a contracted state, and after the buffer roller 8 in the movable frame 7 comes into contact with the outside of the axial flow fan housing, the buffer roller The extrusion force 8 received from the axial flow fan housing is transmitted to the movable frame 7, driving the movable frame 7 and the second clamping plate 6 to generate relative displacement, and allowing the first spring 24 to be stretched until the buffer roller 8 is squeezed to contact with the second clamping plate 6, which means that the clamping and positioning of the axial flow fan housing is completed. The relative displacement between the movable frame 7 and the second clamping plate 6 also buffers the work of the positioning structure. The hard rubber material of the buffer roller 8 has a certain deformation ability, which can effectively avoid rigid strong contact with the outside of the axial flow fan housing, causing damage to the axial flow fan housing.

[0032] A servo motor 21 located between the buffer rollers 8 is fixedly connected to the movable frame 7, and the buffer roller 8 is movably connected to the movable frame 7 through a bearing. The driving shaft of the servo motor 21 is associated with the buffer roller 8 through a synchronous wheel 22 and a synchronous belt 23. A avoidance opening 14 adapted to the size of the servo motor 21, the synchronous wheel 22 and the synchronous belt 23 is provided on the second clamping plate 6, and a positioning groove 15 adapted to the external shape of the buffer roller 8 is provided on the second clamping plate 6. The opening of the avoidance opening 14 can facilitate the relative displacement between the second clamping plate 6 and the movable frame 7, and avoid obstruction to the displacement of the servo motor 21, the synchronous wheel 22 and the synchronous belt 23 following the movable frame 7. When the axial flow fan housing is positioned and clamped, the buffer roller 8 contacts with the outside of the axial flow fan housing, and at the same time, the buffer roller 8 is pressed against the positioning groove 15 on the second clamping plate 6 and clamped by the second The extrusion limit of the holding plate 6 is locked and cannot rotate, thereby ensuring the clamping and positioning effect of the axial flow fan housing. In this state of the positioning structure, the first spring 24 is in a stretched state and accumulates elastic potential energy. During the processing of the axial flow fan housing, the axial flow fan housing needs to be rotated to change the processing position. The cylinder 4 can retract a distance and still maintain the clamping state of the axial flow fan housing, but the second clamping plate 6 and the movable frame 7 are reset a distance under the action of the elastic force of the first spring 24, so that the buffer roller 8 withdraws from the positioning groove 15, and the locking state of the buffer roller 8 is released. After that, the servo motor 21 works and drives the buffer roller 8 to rotate through the transmission of its drive shaft, synchronous wheel 22 and synchronous belt 23, and then drives the axial flow fan housing to rotate through the rolling friction between the buffer roller 8 and the axial flow fan housing to change the processing position of the axial flow fan housing.

[0033] In this embodiment, if Figures 4 to 6As shown, the buffer assembly includes a buffer pad 9 fixedly connected to the outside of the first clamping plate 5, the cross-section of the buffer pad 9 is trapezoidal, and a weakened groove 16 is opened on the inner side wall of the buffer pad 9, and the outside of the first clamping plate 5 is fixedly connected to a first support frame 17 located on the inner side of the buffer pad 9. The first support frame 17 is used to provide support for the buffer pad 9 after the buffer pad 9 is squeezed and deformed. It is made of hard plastic and has a certain deformation ability and a certain structural strength. It can limit the deformation range of the buffer pad 9 and avoid the buffer pad 9 from being misplaced during the deformation process. When the first clamping plate 5 wraps and clamps the outside of the axial flow fan housing under the traction of the cylinder 4, the buffer pad 9 can replace the first clamping plate 5 to contact the outside of the axial flow fan housing. The buffer pad 9 is made of rubber and has Good deformation ability prevents the first clamping plate 5 from directly contacting the axial flow fan housing during the clamping process and causing damage to the axial flow fan housing. It cooperates with the second clamping plate 6, the movable frame 7 and the buffer roller 8 to achieve buffer protection during the clamping and positioning process. The trapezoidal structure of the buffer pad 9 and the weakened groove 16 on its inner side make the buffer pad 9 thinner in thickness at the weakened groove 16 and weaker in strength, making it more likely to deform after being subjected to external force. After the buffer pad 9 is squeezed by the axial flow fan housing, it can be deformed along the guidance of its trapezoidal structure and the area opened by the weakened groove 16, thereby ensuring the shape of the buffer pad 9 after extrusion and deformation, so that the first clamping plate 5 and the buffer pad 9 can be evenly distributed on the outside of the axial flow fan housing in the extruded and clamped state, ensuring uniform stress distribution for clamping and positioning.

[0034] In this embodiment, if Figures 4 to 10As shown, the reinforcement assembly includes a pressure head 25 and a pressure plate 26 fixedly connected to both ends of the telescopic column 11, the pressure head 25 is located on the inner side of the movable frame 7, and a second spring 27 is fixedly connected between the pressure head 25 and the inner side wall of the movable frame 7, the pressure plate 26 is located on the outer side of the movable frame 7, the inner side of the movable frame 7 is fixedly connected with a limit frame 12 located between the pressure heads 25, and an extrusion plate 29 is symmetrically installed on the outer side of the limit frame 12. The limit frame 12 is located in the middle position of the inner side of the movable frame 7, between the two telescopic columns 11 distributed up and down, the cross-section of the structure formed by the limit frame 12 and the extrusion plate 29 is U-shaped, and the end of the extrusion plate 29 is inclined toward the middle of the limit frame 12, and an extrusion surface 30 is arranged on the outer side of the extrusion plate 29, and a pressure receiving surface 28 adapted to the shape of the extrusion surface 30 is opened on the outer side of the pressure head 25, and a pressure support plate 32 is fixedly connected to the side of the extrusion plate 29 away from the extrusion surface 30. The inner side of the limiting frame 12 is fixedly connected with a second supporting frame 31 that supports the pressing supporting plate 32. The second supporting frame 31 is distributed in an eight-shaped shape on the limiting frame 12, and its end faces the position of the pressing supporting plate 32 on the extrusion plate 29. The pressing supporting plate 32 is arc-shaped and contacts with the end of the second supporting frame 31. The second supporting frame 31 and the connection between the extrusion plate 29 and the limiting frame 12 are all provided with a deformation zone, which is thinned and has weaker strength, so that the extrusion plate 29 and the second supporting frame 31 can be deformed more easily in the deformation zone after being subjected to external force, so as to guide the deformation state of the extrusion plate 29 and the second supporting frame 31. The second supporting frame 31 is used for supporting and limiting the extrusion plate 29 after deformation. After the external force on the extrusion plate 29 is removed, the extrusion plate 29 is assisted in recovering quickly by squeezing the pressing supporting plate 32 by itself, and the extrusion plate 29 can also be prevented from being damaged due to excessive deformation.

[0035] When the first clamping plate 5, the second clamping plate 6, the movable frame 7 and the buffer roller 8 cooperate to clamp and position the outside of the axial flow fan housing, after the buffer roller 8 contacts the axial flow fan housing, the relative displacement between the second clamping plate 6 and the movable frame 7 will synchronously drive the relative displacement between the telescopic column 11 and the limiting frame 12, and the pressure head 25 on the telescopic column 11 will gradually approach the outside of the extrusion plate 29 on the limiting frame 12 and come into contact with the extrusion plate 29. The extrusion surface 30 on the extrusion plate 29 contacts and squeezes the pressure surface 28 on the pressure head 25. The pressure head 25 decomposes the extrusion force from the extrusion plate 29 through the pressure surface 28 to form an extrusion force in the direction away from the limiting frame 12, thereby driving the telescopic column 11 and the movable frame 7 to slide relative to each other and compressing the second spring 27 until the pressure plate 26 comes into contact with the flange edge of the axial flow fan housing and presses against the flange edge, thereby further increasing the entire positioning. The contact points between the positioning structure and the axial flow fan housing during the clamping and positioning process can produce clamping and positioning effects in different directions, thereby realizing the fixation of the axial flow fan housing during the processing process. Before the second clamping plate 6 is not docked with the positioning groove 15, if the pressure plate 26 has been in contact with the flange edge of the axial flow fan housing, the pressure head 25 will still follow the displacement of the movable frame 7 to further generate pressure on the extrusion plate 29, so that the extrusion plate 29 is bent and deformed in the deformation zone, and drive the pressure support plate 32 on the extrusion plate 29 to squeeze the second support frame 31 on the limit frame 12, and also make the second support frame 31 bend and deform in the deformation zone, so as to adapt to the relative displacement between the second clamping plate 6 and the movable frame 7. While adapting to the displacement, it will not cause excessive extrusion to the flange edge of the axial flow fan housing and cause damage to the flange edge. It can take into account the stability of the positioning structure in the clamping and positioning state and the buffering protection effect of the axial flow fan housing during the clamping process.

[0036] The present invention covers any substitution, modification, equivalent method and scheme made on the essence and scope of the present invention. In order to make the public have a thorough understanding of the present invention, specific details are described in detail in the following preferred embodiments of the present invention, but those skilled in the art can fully understand the present invention without the description of these details. In addition, in order to avoid unnecessary confusion about the essence of the present invention, well-known methods, processes, procedures, components and circuits are not described in detail.

[0037] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A positioning structure for machining an axial flow fan housing, characterized in that: It comprises a mounting seat, cylinders evenly distributed are symmetrically mounted on both sides of the mounting seat, first clamping plates are fixedly connected to the ends of the cylinders, second clamping plates are arranged between adjacent first clamping plates, a movable frame is sleeved on the outer side of the second clamping plate, buffer rollers are symmetrically mounted in the movable frame, and evenly distributed telescopic columns are sleeved on the movable frame; A buffer assembly, used for buffering when the first clamping plate and the second clamping plate perform clamping work, and the buffer assembly is connected to the first clamping plate; A reinforcement component is used for reinforcing the first clamping plate and the second clamping plate during clamping operation, and the reinforcement component is connected to the telescopic column.

2. The positioning structure for machining an axial flow fan housing according to claim 1, characterized in that: The mounting seat is fixedly connected with evenly distributed electric telescopic rods, the top ends of the electric telescopic rods are fixedly connected with a lifting platform, and the lifting platform is located below the cylinder.

3. The positioning structure for machining an axial flow fan housing according to claim 1, characterized in that: An elastic sheet is fixedly connected between the first clamping plate and the second clamping plate, and the elastic sheet is wavy in shape. A connecting seat located outside the elastic sheet is fixedly connected to both the first clamping plate and the second clamping plate.

4. The positioning structure for machining an axial flow fan housing according to claim 3, characterized in that: A connecting rod is sleeved between adjacent connecting seats, both ends of the connecting rod are sleeved in the connecting seats, and the connecting rod and the connecting seat are movably connected via a rotating shaft.

5. The positioning structure for machining an axial flow fan housing according to claim 1, characterized in that: The cross-section of the movable frame is U-shaped, the telescopic columns are distributed at the edge of the opening of the movable frame, the second clamping plate is provided with a sleeve interface, the movable frame is sleeved in the sleeve interface, and the movable frame is fixedly connected with uniformly distributed first springs between the second clamping plates.

6. The positioning structure for machining an axial flow fan housing according to claim 1, characterized in that: A servo motor located between the buffer rollers is fixedly connected in the movable frame, the buffer roller and the movable frame are movably connected via a bearing, and the driving shaft of the servo motor and the buffer roller are associated and connected via a synchronous wheel and a synchronous belt.

7. The positioning structure for machining an axial flow fan housing according to claim 6, characterized in that: The second clamping plate is provided with an escape opening matched with the sizes of the servo motor, the synchronous wheel and the synchronous belt, and the second clamping plate is provided with a positioning groove matched with the external shape of the buffer roller.

8. The positioning structure for machining an axial flow fan housing according to claim 1, characterized in that: The buffer assembly includes a buffer pad fixedly connected to the outside of the first clamping plate, the buffer pad has a trapezoidal cross-section, and a weakened groove is opened on the inner side wall of the buffer pad. The outside of the first clamping plate is fixedly connected to a first support frame located on the inner side of the buffer pad.

9. The positioning structure for machining an axial flow fan housing according to claim 1, characterized in that: The reinforcement assembly includes a pressure head and a pressure plate fixedly connected to both ends of the telescopic column, the pressure head is located on the inner side of the movable frame, and a second spring is fixedly connected between the pressure head and the inner side wall of the movable frame, and the pressure plate is located on the outer side of the movable frame.

10. The positioning structure for machining an axial flow fan housing according to claim 9, characterized in that: A limiting frame located between the pressure heads is fixedly connected to the inner side of the movable frame, an extrusion plate is symmetrically installed on the outer side of the limiting frame, an extrusion surface is arranged on the outer side of the extrusion plate, a pressure-bearing surface matched with the shape of the extrusion surface is arranged on the outer side of the pressure head, a pressure support plate is fixedly connected to the side of the extrusion plate away from the extrusion surface, and a second support frame supporting the pressure support plate is fixedly connected to the inner side of the limiting frame.

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