Inflatable pump housing cutting device

Abstract

The present application relates to the technical fields of air pump processing, in particular to a kind of air pump shell cutting device, including base and multiple cutting machining heads being set around on base, still including: support shaft, set in the middle of multiple cutting machining heads, its inside is opened with through chip removal channel along central axis, the peripheral wall of support shaft is opened with several guide sliding slots along radial direction.The present application is by setting support shaft in the center of multiple cutting machining heads, and using axial driving rod displacement driving wedge surface extrusion expansion block, realizes the radial synchronous expansion clamping from inside to outside, can provide stable inner wall support for thin-walled cylindrical air pump shell, avoids the occupation to external processing space, allows multiple cutting machining heads around simultaneously to workpiece simultaneously work, saves multiple clamping procedures, shortens single piece processing rhythm, and can effectively support thin-walled shell, reduce the cutting deformation of shell when under stress, guarantee processing precision.

Description

Technical Field

[0001] This invention relates to the field of air pump processing technology, and in particular to an air pump housing cutting device. Background Technology

[0002] Air pumps, as a common inflation device, are widely used for pressure replenishment of automobile tires, ball products, and outdoor inflatable products. The shell of an air pump is usually a thin-walled cylindrical structure. In the manufacturing process of the air pump shell, machining is the key process for its formation, which mainly involves opening holes on the shell surface, milling mounting positions, and edge trimming. Due to the large market demand for air pumps and the rapid updates of product models, the shape and size specifications of the shell tend to be diversified. This requires the machining equipment to not only ensure the positional accuracy of the machined surface, but also to have high production efficiency and process adaptability.

[0003] Currently, in the machining of air pump housings, external clamps are often used for positioning and fixing. This involves multiple jaws or clamps gripping the workpiece from the outside towards the center. The clamping assembly covers most of the workpiece's outer perimeter, restricting the movement path of the machining tool. It is often impossible to complete the full circumferential machining in a single clamping, requiring multiple stops to change the clamping position. This not only prolongs the production cycle but also easily introduces accumulated errors from secondary clamping. Furthermore, the external clamping force acts directly on the thin-walled housing. If the clamping force is unevenly distributed, it can easily cause radial extrusion deformation of the workpiece. The external clamping structure usually forms a closed or semi-closed space inside the workpiece, making it easy for chips generated during cutting to accumulate inside the workpiece and difficult to remove. This can not only scratch the machined surface but also cause inconvenience for subsequent cleaning and maintenance. Summary of the Invention

[0004] In view of this, the purpose of this invention is to provide a cutting device for the outer shell of an air pump, so as to solve the problems that the workpiece machining surface is obscured by the external clamping structure used in the current cutting of the outer shell of the air pump, requiring multiple clamping, and the thin-walled shell is easily deformed by pressure, which affects the machining accuracy.

[0005] To achieve the above objectives, the present invention provides a cutting device for an air pump housing, comprising a base and a plurality of cutting heads arranged around the base, and further comprising: A support shaft is located in the middle of multiple cutting heads. A through chip removal channel is opened inside the shaft along the central axis. Several guide grooves are opened radially through the peripheral sidewall of the support shaft. The axial drive rod is a hollow tube that can be slidably inserted into the chip removal channel. The outer circumferential surface of the axial drive rod is machined with a wedge-shaped drive surface corresponding to the position of the guide groove. The expansion blocks are slidably disposed in the guide grooves in a one-to-one correspondence. The inner bottom surface of the expansion blocks has a force-bearing inclined surface that fits against the wedge-shaped driving surface. When the axial driving rod makes an axial displacement, the wedge-shaped driving surface squeezes the force-bearing inclined surface and drives the expansion blocks to extend radially outward. The outer surface of the expansion blocks is a clamping surface for fitting against the inner wall of the air pump housing. An elastic reset element is sleeved around the middle of several of the tightening blocks to provide a restoring force that forces the tightening blocks to contract inward; The clamping surface has a recessed groove for the cutting tool of the cutting head to be suspended after penetrating the outer shell. The expansion block has a chip removal through hole that penetrates its body. The outer end of the chip removal through hole is located inside the tool clearance groove, and the inner end passes through the side wall of the support shaft and is connected to the chip removal channel.

[0006] Furthermore, it also includes a drive motor, a drive screw, and a drive sleeve fixedly installed below the support shaft. The output shaft of the drive motor is coaxially connected to the drive screw to drive the drive screw to rotate. The drive sleeve is threaded onto the outside of the drive screw and is fixedly connected to the axial drive rod. When the drive motor drives the drive screw to rotate in place, the drive sleeve moves back in a straight line along the axis of the drive screw, thereby pushing and pulling the axial drive rod.

[0007] Furthermore, a chip extraction and conveying pipe is nested and slidably arranged in the inner cavity of the axial drive rod. The chip extraction and conveying pipe is fixedly connected to the support shaft, so that when the axial drive rod undergoes axial displacement, the chip extraction and conveying pipe and the axial drive rod maintain relative sliding and the internal air passage is continuously connected and conveyed. The outer end of the chip extraction and conveying pipe is connected to a negative pressure fan.

[0008] Furthermore, a negative pressure suction box is provided between the chip conveying pipe and the negative pressure fan. The top of the negative pressure suction box is provided with a suction opening, and a filter screen for intercepting chips is embedded in the suction opening. The negative pressure fan is installed outside the suction opening to generate negative pressure. The bottom of the negative pressure suction box is provided with a chip discharge port, and a one-way flap is installed in the chip discharge port. One side of the one-way flap is rotatably connected to the negative pressure suction box. The one-way flap is configured to only flip outward and downward and cannot flip upward and inward into the negative pressure suction box, so that the intercepted chips are automatically discharged after the negative pressure disappears.

[0009] Furthermore, the tensioning block includes an inner drive clamping block and an outer quick-change clamping block, wherein the drive clamping block and the quick-change clamping block are mutually matched and separable detachable structures. The drive clamping block is slidably disposed in the guide groove, the force-bearing inclined surface is disposed on the bottom surface of the drive clamping block, the quick-change clamping block is detachably installed on the radial outer side of the drive clamping block through the guide connection structure, and the outer peripheral surface of the quick-change clamping block has a clamping surface adapted to the inner cavity of the air pump housing. The chip removal through hole includes segmented through holes respectively opened inside the drive clamping block and the quick-change clamping block. When the drive clamping block and the quick-change clamping block are connected and locked, the segmented through holes inside the two are synchronously aligned and interconnected.

[0010] Furthermore, the guide connection structure includes an axially formed fitting connection groove on the outer side of the drive clamping block, and a fitting connection block protruding on the inner side of the quick-change clamping block and matching the cross-sectional shape of the fitting connection groove. The cross-section of the fitting connection groove is T-shaped, and the quick-change clamping block is slidably inserted into the fitting connection groove in a direction parallel to the central axis of the support shaft through the fitting connection block.

[0011] Furthermore, it also includes an auxiliary quick-change mechanism, which comprises: A horizontally arranged translation guide rail above the base, a translation screw rotatably installed inside the translation guide rail, and a translation screw sleeve threaded onto the outside of the translation screw; The transfer and changing frame is fixedly connected to the translation screw sleeve. Its bottom circumferentially distributed have gripping mating parts that correspond one-to-one with all the quick-change clamping blocks, and the top of the quick-change clamping blocks is provided with gripping connecting parts. A translation motor mounted on the end of the translation screw shaft drives the translation screw to rotate, which in turn drives the translation screw sleeve to move, causing the transfer and changing frame to reciprocate between the first and second positions along the translation guide rail. When the transfer and changing frame moves to the first position directly above the support shaft, it engages with the gripping connector through the gripping mating parts, thereby driving a whole set of quick-change clamping blocks to slide upward for disassembly or slide downward for installation. When the transfer and changing rack moves to the second position located on one side of the support shaft, it serves as a loading and unloading standby position for unloading the replaced quick-change clamping block or for pre-connecting the quick-change clamping block to be replaced to it.

[0012] Furthermore, an anti-disengagement locking component is provided between the drive clamping block and the quick-change clamping block, which is used to axially position and lock the quick-change clamping block after it is slidably assembled into place to prevent disengagement. The anti-loosening locking component includes: A mounting locking groove is provided on the side where the drive clamping block and the quick-change clamping block fit together; A locking guide sleeve is horizontally set inside the quick-change clamping block. An elastic locking pin is nested and slidably set inside the locking guide sleeve. The elastic locking pin is set in a position corresponding to the mounting locking groove, and one end of it extends out and is inserted into the mounting locking groove in normal state to achieve locking. A linkage inclined surface is set in the middle of the rod of the elastic locking pin. An unlocking guide sleeve is vertically positioned above a locking guide sleeve. An unlocking pressure rod is nested and slidably arranged inside the unlocking guide sleeve. An unlocking top pressure surface is provided at the bottom of the unlocking pressure rod. The unlocking top pressure surface is in contact with and cooperates with the linkage inclined surface. When the unlocking lever is pressed down, the unlocking top surface at the bottom of the unlocking lever presses against the linkage inclined surface, thereby pushing the elastic locking pin inward and disengaging it from the mounting locking groove, thus releasing the lock on the quick-change clamping block.

[0013] Furthermore, the transfer and changing frame is symmetrically provided with guide sleeves and telescopic cylinders located between the guide sleeves. A vertical guide rod is nested and slidably mounted on the inner side of the guide sleeve. The gripping fitting is specifically a gripping interlocking block connected to the vertical guide rod. The output end of the telescopic cylinder is connected to the gripping interlocking block to pull the gripping interlocking block to move up and down. The gripping connection part is specifically a fitting gripping groove opened on the top end face of the quick-change clamping block. A magnetic traction block is provided inside the fitting gripping groove. An electromagnet corresponding to the magnetic traction block is provided in the middle of the gripping fitting block. The gripping fitting block is driven downward into the fitting gripping groove by a telescopic cylinder for mechanical fitting and positioning. The magnetic connection gripping is achieved by the electromagnet attracting the magnetic traction block, or it can be pulled upward to disengage from the fitting gripping groove. The top of the unlocking lever extends upward and protrudes from the bottom of the engaging gripping slot.

[0014] Furthermore, a storage turntable is provided at the second position of the base, and multiple unit storage racks are evenly arranged around the top of the storage turntable in a circumferential direction. Each unit storage rack has a vertically cut-in storage slot that matches the shape of the quick-change clamping block.

[0015] The beneficial effects of the present invention are as follows: As can be seen from the above description, the air pump housing cutting device provided by the present invention, by setting a support shaft at the center of multiple cutting heads and using the axial drive rod displacement to drive the wedge surface to squeeze the expansion block, achieves radial synchronous expansion clamping from the inside to the outside. It can provide stable inner wall support for the thin-walled cylindrical air pump housing, and completely open the entire outer circumference of the workpiece, avoiding the occupation of external processing space. It allows multiple cutting heads surrounding the workpiece to work on the workpiece simultaneously, realizing one clamping and multi-position synchronous processing, eliminating the tedious process of multiple clamping, shortening the single-piece processing cycle, and the internal multi-point uniform expansion can also effectively support the thin-walled shell, reduce the cutting deformation of the shell under force, and ensure the processing accuracy and coaxiality of the product. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only for this invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a partial structural diagram of the base portion according to an embodiment of the present invention; Figure 2 This is a front view of an embodiment of the present invention. Figure 3 This is a schematic diagram of the internal structure of the storage turntable according to an embodiment of the present invention; Figure 4 This is a schematic diagram of the support shaft according to an embodiment of the present invention; Figure 5 This is a schematic diagram of the structure of the expansion block according to an embodiment of the present invention; Figure 6 This is a schematic diagram of the axial drive rod according to an embodiment of the present invention; Figure 7 This is a schematic diagram of the internal structure of the chip extraction and conveying pipe according to an embodiment of the present invention; Figure 8 This is a schematic diagram of the outer structure of the quick-change clamping block according to an embodiment of the present invention; Figure 9 This is a schematic diagram of the inner structure of the quick-change clamping block according to an embodiment of the present invention; Figure 10 This is a schematic diagram of the internal structure of the quick-change clamping block according to an embodiment of the present invention; Figure 11 This is a schematic diagram of the anti-loosening locking component according to an embodiment of the present invention; Figure 12 This is a schematic diagram of the negative pressure suction box according to an embodiment of the present invention; Figure 13 This is a schematic diagram of the transfer and changing rack according to an embodiment of the present invention; Figure 14 This is a schematic diagram of the gripping interlocking block according to an embodiment of the present invention; Figure 15 This is a schematic diagram of the storage turntable according to an embodiment of the present invention.

[0018] The diagram is marked as follows: 1. Machine base; 11. Cutting head; 2. Support shaft; 21. Chip removal channel; 22. Guide groove; 3. Axial drive rod; 31. Wedge-shaped drive surface; 32. Chip conveying pipe; 33. Drive screw sleeve; 34. Drive lead screw; 35. Drive motor; 4. Negative pressure suction box; 41. Suction opening; 42. Filter screen; 43. Negative pressure fan; 44. Chip discharge port; 45. One-way flap; 5. Expansion block; 51. Drive clamping block; 511. Force-bearing inclined surface; 512. Elastic reset component; 513. Fitting connecting block; 52. Quick-change clamping block; 521. Clamping surface; 522. Tool clearance groove; 523. Chip discharge through hole; 524. Fitting connection groove; 525. Fitting gripping groove; 526. Magnetic traction block; 6. Anti-loosening locking component; 61. Locking guide sleeve; 611. Elastic locking pin; 612. Linkage inclined surface; 62. Unlocking guide sleeve; 621. Unlocking pressure rod; 622. Unlocking top pressure surface; 63. Installation locking groove; 7. Translation guide rail; 71. Translation screw; 72. Translation screw sleeve; 73. Translation motor; 74. Transfer and changing rack; 741. Guide sleeve; 742. Telescopic cylinder; 75. Gripping fitting block; 751. Electromagnet; 752. Vertical guide rod; 8. Storage turntable; 81. Unit storage rack; 82. Fitting storage groove. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to specific embodiments.

[0020] It should be noted that, unless otherwise defined, the technical or scientific terms used in this invention should have the ordinary meaning understood by one of ordinary skill in the art to which this invention pertains. The terms "first," "second," and similar terms used in this invention do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0021] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Figure 9 , Figure 10 , Figure 11 , Figure 12 As shown, an air pump housing cutting device includes a base 1 and a plurality of cutting heads 11 arranged around the base 1, and further includes: The support shaft 2 is located in the middle of multiple cutting heads 11. A through chip removal channel 21 is opened inside the shaft along the central axis. Several guide grooves 22 are opened radially through the peripheral sidewall of the support shaft 2. The axial drive rod 3 is a hollow tube that can be slidably inserted into the chip removal channel 21. The outer peripheral surface of the axial drive rod 3 is machined with a wedge-shaped drive surface 31 corresponding to the guide groove 22. The expansion blocks 5 are slidably disposed in the guide groove 22 in a corresponding manner. The inner bottom surface of the expansion blocks 5 has a force-bearing inclined surface 511 that fits against the wedge-shaped driving surface 31. When the axial driving rod 3 makes axial displacement, the wedge-shaped driving surface 31 squeezes the force-bearing inclined surface 511 and drives the expansion blocks 5 to extend outward radially. The outer surface of the expansion blocks 5 is a clamping surface 521 for fitting against the inner wall of the air pump housing. The elastic reset member 512 is sleeved around the middle of a plurality of tensioning blocks 5 and is used to provide a restoring force that forces the tensioning blocks 5 to contract inward; Among them, the clamping surface 521 has a recessed tool relief groove 522 for the cutting tool of the cutting head 11 to be suspended after penetrating the outer shell. The expansion block 5 has a chip discharge through hole 523 that penetrates its body. The outer end of the chip discharge through hole 523 is located inside the tool relief groove 522, and the inner end penetrates the support shaft 2 and is connected to the chip discharge channel 21.

[0022] In this embodiment, the device mainly includes a base 1 and a plurality of cutting heads 11 arranged around the base 1. An internal expansion assembly for fixing the workpiece from the inside is provided in the middle of the base 1. The main body of the internal expansion assembly is a support shaft 2, which is located at the center of the plurality of cutting heads 11. This internal expansion support combined with the overall layout of the outer surrounding cutting fits the processing characteristics of hollow cylindrical parts such as the air pump housing, and can provide a stable workpiece holding environment for multi-station synchronous cutting. The support shaft 2 has a through chip removal channel 21 along its central axis inside. Several guide grooves 22 are radially through the peripheral wall of the support shaft 2. A hollow tubular axial drive rod 3 slides through the chip removal channel 21. Wedge-shaped drive surfaces 31 are machined on the outer peripheral surface of the axial drive rod 3 corresponding to the positions of each guide groove 22. Expansion blocks 5 are slidably arranged in each guide groove 22. The inner bottom surface of the expansion block 5 has a force-bearing inclined surface 511 that fits against the wedge-shaped drive surface 31, while the outer surface of the expansion block 5 serves as a clamping surface 521 that fits against the inner wall of the air pump housing. When it is necessary to clamp the workpiece, the drive source pulls the axial drive rod 3 to make axial displacement, causing the wedge-shaped drive surface 31 to compress the workpiece. The inclined plane 511 drives all the expansion blocks 5 to extend outward synchronously in the radial direction and press against the inner wall of the outer shell. This transmission method, which converts axial linear motion into radial multi-point expansion, ensures good synchronization of the movement of each expansion block 5, uniform force distribution, and good automatic centering function. It can firmly clamp the thin-walled outer shell and reduce its deformation under cutting force. In addition, an elastic reset element 512, i.e., a ring spring, is sleeved around the middle of several expansion blocks 5. When the cutting is completed and the axial drive rod 3 retracts, the elastic reset element 512 can provide a restoring force that forces the expansion blocks 5 to contract inward, ensuring that all expansion blocks 5 quickly and smoothly return to the initial position, thereby facilitating rapid unloading after processing and improving the efficiency of loading and unloading. To address the issues of interference and chip removal difficulties arising from penetrating cutting processes, this device features a tool clearance groove 522 recessed into the clamping surface 521 of the expansion block 5. The cutting head 11, mounted on a horizontal guide rail structure, can move back and forth, driving the cutting tool mounted at its front end to machine the pump body housing. The tool clearance groove 522 allows the cutting tool of the cutting head 11 to remain suspended after penetrating the housing. This design provides sufficient safety margin, effectively preventing the cutting tool from cutting into the fixture body when penetrating the housing, protecting the tool edge, and extending the fixture's service life. Simultaneously, the expansion block 5 has a chip removal through-hole 523 penetrating its body for chip removal. The outer opening of the through hole 523 is directly set inside the tool clearance groove 522, and its inner end passes through the support shaft 2 and is connected to the chip removal channel 21. During the machining process, the chips generated by the tool penetrating the outer shell will fall directly into the tool clearance groove 522. Under the guidance of the cutting fluid or airflow, they will enter the chip removal channel 21 of the support shaft 2 and the hollow tubular axial drive rod 3 through the chip removal through hole 523, and finally be discharged from the center of the device. This effectively avoids the accumulation of metal chips in the inner cavity of the workpiece or the machining area, reduces the risk of chips scratching the machined surface, and also reduces the difficulty of cleaning and maintenance inside the machine tool, ensuring the reliability of the equipment for long-term continuous cutting.

[0023] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Figure 9 , Figure 10 , Figure 11 , Figure 12 As shown, preferably, the device also includes a drive motor 35, a drive screw 34, and a drive sleeve 33 fixedly disposed below the support shaft 2. The output shaft of the drive motor 35 is coaxially connected to the drive screw 34 for directly driving the drive screw 34 to rotate. The drive sleeve 33 is threaded onto the outside of the drive screw 34 and is fixedly connected to the internal axial drive rod 3. In actual operation, the drive motor 35 rotates forward or backward to drive the drive screw 34 to rotate in place. Based on the threaded engagement principle, the drive sleeve 33 will move back and forth in a straight line along the axis of the drive screw 34, thereby pushing and pulling the axial drive rod 3 to move back and forth to achieve the aforementioned tightening and loosening actions. The radial elongation of the tightening block 5 can be precisely adjusted by controlling the rotation angle of the motor, thereby adapting to the inner diameter of the outer shell within a certain tolerance range. It can also maintain the clamping state of the workpiece by relying on its self-locking characteristics when the motor power is cut off during cutting or when a sudden power failure occurs, preventing the workpiece from loosening and flying out under the action of cutting force, thus improving the safety of the processing.

[0024] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Figure 9 , Figure 10 , Figure 11 , Figure 12 As shown, preferably, in the chip removal power and transmission structure of the device, a chip extraction and conveying pipe 32 is nested and slidably arranged in the inner cavity of the axial drive rod 3, and the chip extraction and conveying pipe 32 is fixedly connected to the fixed support shaft 2. In actual operation, when the drive mechanism pushes and pulls the axial drive rod 3 to generate axial displacement to complete the clamping or loosening action of the workpiece, the chip extraction and conveying pipe 32 and the axial drive rod 3 can maintain relative sliding, and the internal suction air passage maintains a continuous connected conveying state during the sliding process. The outer end of the chip extraction and conveying pipe 32 is connected to a negative pressure fan 43. The nested pipe design ensures the sealing and unobstructedness of the chip removal channel 21 when the device is in any action position. At the same time, with the active suction air force provided by the negative pressure fan 43, the chips generated in the cutting area can be quickly extracted outward. To achieve centralized chip collection and equipment protection, a negative pressure suction box 4 is connected in series between the chip conveying pipe 32 and the negative pressure fan 43. The top of the negative pressure suction box 4 has a suction opening 41, and a filter screen 42 for intercepting chips is embedded in the suction opening 41. The negative pressure fan 43 is installed outside the suction opening 41 to generate suction negative pressure. When the airflow containing chips is drawn into the negative pressure suction box 4, the filter screen 42 can intercept the metal chips inside the box, allowing only gas to pass through, thus achieving effective separation of airflow and solid chips. In addition, a chip discharge port 44 is provided at the bottom of the negative pressure suction box 4. A one-way flap 45 is installed inside the chip discharge port 44. One side of the one-way flap 45 is rotatably connected to the negative pressure suction box 4, and the structure is configured to only flip outward and downward, and cannot flip inward and upward. During the cutting process, the negative pressure fan 43 operates to create a negative pressure environment inside the box. Under the action of atmospheric pressure difference, the one-way flap 45 is sucked upward and the chip discharge port 44 is closed, thereby maintaining the sealing state of the box to ensure the suction force. When the cutting is finished and the fan stops, the negative pressure inside the box disappears, and the chips accumulated above the one-way flap 45 will naturally push open the flap under the action of their own gravity and fall outward and downward automatically. The automatic unloading design is achieved by using the air pressure change in the working state combined with gravity. There is no need to add an additional motor or cylinder or other drive mechanism to control the opening and closing of the chip discharge door, making the waste cleaning process more automated and smooth.

[0025] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Figure 9 , Figure 10 , Figure 11 , Figure 12 As shown, preferably, in order to adapt to the processing requirements of air pump housings of different specifications and reduce maintenance costs, the expansion block 5 adopts a split modular design, specifically including an inner drive clamping block 51 and an outer quick-change clamping block 52. The two are mutually matched and separable detachable structures. In the actual layout, the drive clamping block 51 is slidably disposed in the guide groove 22, and its bottom surface is provided with a force-bearing inclined surface 511 to bear the radial thrust of the transmission mechanism, while the quick-change clamping block 52 is detachably installed on the radial side of the drive clamping block 51 through a guide connection structure. On the outer side, its outer peripheral surface has a clamping surface 521 that is adapted to the inner cavity of the air pump housing of a specific model. With this split structure, when it is necessary to process housing parts with different inner diameters or shapes, or when the outer clamping surface 521 is worn due to long-term contact with the workpiece, the operator only needs to replace the outer quick-change clamping block 52. There is no need to completely disassemble the internal drive clamping block 51 and the pull rod system involved in the transmission. This not only simplifies the operation process of changing and debugging, shortens the downtime of equipment replacement, but also effectively saves the replacement cost of fixture consumables. Regarding the connection of the chip removal air passage, the chip removal through hole 523 inside the expansion block 5 is designed as a segmented through hole opened in the drive clamping block 51 and the quick-change clamping block 52 respectively. When the drive clamping block 51 and the quick-change clamping block 52 are assembled, connected and locked, the segmented through holes inside the two can be aligned synchronously and connected to each other, ensuring that the integrity of the internal central suction chip removal channel 21 can still be maintained under the premise of adopting the split quick-change structure, and avoiding leakage or blockage of chips and airflow at the splicing joint surface of the two clamping blocks. To ensure the stability of the assembly and the ease of disassembly, the guide connection structure between the quick-change clamping block 52 and the drive clamping block 51 specifically includes an axially oriented fitting connection groove 524 on the outer side of the drive clamping block 51, and a fitting connection block 513 protruding on the inner side of the quick-change clamping block 52 and matching the cross-sectional shape of the fitting connection groove 524. The fitting connection groove 524 has a T-shaped cross-section. When changing the clamp, the quick-change clamping block 52 slides into the fitting connection groove 524 through the fitting connection block 513 on its inner side, in a direction parallel to the central axis of the support shaft 2. This effectively resists the centrifugal force generated during cutting and the radial reaction force during tightening, preventing the quick-change clamping block 52 from radially displacing or coming out, thus ensuring the stability of the clamping state. Installation and disassembly can be completed simply by pushing and pulling along the front and back direction of the support shaft 2, further improving the convenience and efficiency of the changing operation.

[0026] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Figure 9 , Figure 10 , Figure 11 , Figure 12 , Figure 13 , Figure 14 and Figure 15 As shown, preferably, in order to further improve the automation level of the equipment and shorten the auxiliary time for changing the clamps, the device is equipped with an auxiliary quick-change mechanism. The core motion components of the mechanism include a translation guide rail 7 horizontally set above the base 1, a translation screw 71 rotatably installed inside the translation guide rail 7, and a translation sleeve 72 threadedly sleeved on its outer side. The transfer and changing frame 74 is fixedly connected to the translation sleeve 72. Its bottom circumferentially distributed have gripping engagement parts corresponding to all the quick-change clamping blocks 52, and the top of the quick-change clamping block 52 is provided with a gripping connection part. In actual operation, the translation screw 71 is driven to rotate by the translation motor 73 at the shaft end of the translation screw 71. Utilizing the precise guidance of the threaded transmission, the transfer and changing frame 74 is driven to switch back and forth between the first position and the second position along the translation guide rail 7. When the transfer and changing frame 74 is moved to the first position directly above the support shaft 2, the gripping mat at its bottom engages with the gripping connection at the top of the quick-change clamping block 52, thereby driving the entire set of quick-change clamping blocks 52 to slide upward synchronously to disengage from the drive clamping block 51, or to slide downward synchronously to insert into the drive clamping block 51 to complete the installation. This changes the tedious traditional manual disassembly and assembly of clamping blocks one by one, ensuring the consistency of force and positional coordination of the entire clamping unit during the installation process, reducing the risk of clamping eccentricity caused by improper installation of a single block, and also significantly reducing the downtime and debugging time of the production line when switching product specifications. When the transfer and changing frame 74 moves to the second position located on one side of the support shaft 2, this position serves as a loading and unloading standby position. It is used to unload the old quick-change clamping block 52 that has been replaced from the frame, or to pre-connect and install the new quick-change clamping block 52 to be replaced in the next batch. This shifts the loading and unloading operation area from the machining center to the lateral standby position, providing operators with a more spacious and safer working space. It avoids the safety hazards that may arise from manual maintenance in complex cutting areas. At the same time, this offline preparation method allows the pre-assembly of the fixture and the machining process of the workpiece to overlap in time, further optimizing the production cycle and improving the operational continuity of the entire machine system.

[0027] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Figure 9 , Figure 10 , Figure 11 , Figure 12 , Figure 13 , Figure 14 and Figure 15 As shown, preferably, in order to ensure that the quick-change clamping block 52 can maintain the stability of its assembly position in a high-speed rotation or vibration environment during the cutting process, an anti-disengagement locking component 6 is cleverly provided between the drive clamping block 51 and the quick-change clamping block 52. This component is specifically used to axially position and lock the quick-change clamping block 52 after it has been slidably assembled into place. The core structure of the anti-disengagement locking component 6 includes a mounting locking groove 63 on the mating side of the drive clamping block 51 and the quick-change clamping block 52. This embedded locking design utilizes the fit clearance between the parts and can effectively limit the relative sliding of the quick-change clamping block 52 in the axial direction without increasing the external space occupied, thereby preventing it from being dislodged under force during the processing and ensuring the safety of the cutting operation and the accuracy of the workpiece clamping. Regarding the specific locking and unlocking linkage logic, a locking guide sleeve 61 is horizontally arranged inside the quick-change clamping block 52. An elastic locking pin 611 is nested and slidably arranged inside the sleeve. The position of the elastic locking pin 611 corresponds precisely to the mounting locking groove 63. Under normal conditions, relying on the restoring force provided by its internal spring, one end of the elastic locking pin 611 will actively extend and insert into the mounting locking groove 63 of the drive clamping block 51 to achieve automatic physical locking. At the same time, a linkage inclined surface 612 is provided in the middle of the rod of the elastic locking pin 611. An unlocking guide sleeve 62 is vertically arranged above the locking guide sleeve 61. An unlocking pressure rod 621 is slidably installed inside the sleeve. The bottom of the unlocking pressure rod 621 is provided with an unlocking top pressure surface 622 that is attached to and cooperates with the linkage inclined surface 612. When the clamp needs to be replaced and the unlocking lever 621 is pressed down, the unlocking top surface 622 at the bottom of the unlocking lever 621 will press down on the linkage inclined surface 612. Through the transmission and steering action of the inclined surface, the vertical pressing force is converted into a horizontal thrust, thereby pushing the elastic locking pin 611 into the quick-change clamping block 52 until it disengages from the mounting locking groove 63 on the drive clamping block 51. The quick-change clamping block 52 can be quickly released by simply pressing down vertically and linearly, which improves the response speed and operation reliability of the entire quick-change system when executing the unlocking command.

[0028] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Figure 9 , Figure 10 , Figure 11 , Figure 12 , Figure 13 , Figure 14 and Figure 15 As shown, preferably, in order to achieve precise gripping and smooth lifting of the quick-change clamping block 52, the transfer and changing frame 74 is symmetrically provided with guide sleeves 741 and telescopic cylinders 742 located between the guide sleeves 741. A vertical guide rod 752 is nested and slidably mounted on the inner side of the guide sleeves 741. The gripping fitting is specifically a gripping fitting block 75 connected to the vertical guide rod 752. The output end of the telescopic cylinder 742 is connected to the gripping fitting block 75 to pull the gripping fitting block 75 to move up and down. In terms of the detailed structure of the gripping connection, the gripping connection part is specifically a fitting gripping groove 525 opened on the top end face of the quick-change clamping block 52. A magnetic traction block 526 is provided inside the fitting gripping groove 525, and an electromagnet 751 is correspondingly provided in the middle of the gripping fitting block 75. When performing gripping and changing, the telescopic cylinder 742 drives the gripping fitting block 75 to move downward and embed into the fitting gripping groove 525. The bottom of the gripping fitting block 75 and the top edge of the fitting gripping groove 525 are provided with guide chamfers to facilitate mechanical fitting and positioning of the two in terms of physical shape. Then, the electromagnet 751 is energized to attract the bottom. The magnetic traction block 526 of the part realizes magnetic connection and gripping. When it needs to be released after installation, the electromagnet 751 is de-energized and the cylinder is pulled upward to separate the two. The mechanical plug-in effectively limits the horizontal sway or relative offset of the quick-change clamping block 52 during the transportation process, ensuring the positional accuracy when lifting and docking. On the other hand, the electromagnetic force replaces the traditional mechanical gripper structure, eliminating the complex buckles and drive linkages, making the structure of the gripping end face simpler and more compact. Moreover, the control response of the adsorption and release action is fast, reducing the mechanical wear rate under long-term high-frequency change operation. Regarding the linkage unlocking logic, the top of the unlocking lever 621 is designed to extend upwards and protrude from the bottom surface of the interlocking gripping slot 525. Based on this structural layout, when the telescopic cylinder 742 drives the gripping interlocking block 75 to insert downwards into the interlocking gripping slot 525 for positioning, the flat bottom surface of the gripping interlocking block 75 will simultaneously press down on the protruding unlocking lever 621. This design allows the device to automatically push the unlocking lever 621 using the physical stroke of the gripping component itself while completing the downward gripping, thereby simultaneously unlocking the anti-detachment structure inside the quick-change clamping block 52. This combines the originally independent processes of downward gripping positioning and downward unlocking release into a continuous vertical mechanical action, simplifying the overall mechanical hierarchy and electrical control logic of the automated changing system, reducing fault points, shortening the changing time of a single station, and improving the overall changing efficiency of the cutting device.

[0029] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Figure 9 , Figure 10 , Figure 11 , Figure 12 , Figure 13 , Figure 14 and Figure 15As shown, preferably, in order to achieve orderly management and rapid scheduling of multiple sets of quick-change clamping blocks 52 of different specifications, the base 1 is specially equipped with a storage turntable 8 at the second position. Multiple unit storage racks 81 are evenly arranged around the storage turntable 8 in the circumferential direction, so that the equipment can centrally store multiple sets of clamping units of different models in a limited space. When facing multi-variety, small-batch production tasks, the equipment can directly call up the required fixtures from the on-board storage, which improves the processing adaptability of the cutting device to different specifications of air pump shells and the flexible production change capability. In terms of the specific storage structure, each unit storage rack 81 has a vertically opened fitting storage slot 82 that matches the shape of the quick-change clamping block 52, which provides a stable physical limit for the quick-change clamping block 52 and prevents it from tipping over or colliding when the turntable rotates or the equipment vibrates, thus preventing damage to the precision machining surface. At the same time, the layout of its vertical opening also conforms to the vertical lifting and lowering motion logic of the aforementioned gripping mechanism, laying the foundation for smooth automatic insertion and removal. In the actual automated changeover process, when the transfer changeover rack 74, carrying the replaced old quick-change clamping block 52, moves to the second position and stops directly above the storage turntable 8, the rotation of the storage turntable 8 is controlled to switch the designated empty unit storage rack 81 to the corresponding lower position. Subsequently, the telescopic cylinder 742 pulls and grabs the fitting block 75 downward, causing the replaced quick-change clamping block 52 to slide vertically into the fitting storage slot 82 to complete its return and storage. Immediately afterwards, the gripping mechanism releases, the storage turntable 8 rotates again, and the storage rack pre-stored with the next batch of quick-change clamping blocks 52 to be installed is switched to this position. The telescopic cylinder 742 descends again to grab and lifts upward, vertically sliding out the new quick-change clamping block 52 from the fitting storage slot 82. Through the coordinated action of the turntable positioning and the vertical storage and retrieval by the cylinder, manual handling and alignment are eliminated, effectively shortening the auxiliary preparation time of the cutting device during product changeover and improving the continuous processing rate and overall automation level of the machine tool.

[0030] The air pump housing cutting device provided by this invention achieves radial synchronous expansion clamping from the inside out by setting a support shaft 2 at the center of multiple cutting heads 11 and using an axial drive rod 3 to drive the wedge-shaped surface to squeeze the expansion block 5. This provides stable inner wall support for the thin-walled cylindrical air pump housing and completely opens the entire outer circumference of the workpiece, avoiding the occupation of external processing space. It allows multiple cutting heads 11 surrounding the workpiece to work simultaneously, realizing multi-position synchronous processing in one clamping, eliminating the cumbersome process of multiple clamping, shortening the single-piece processing cycle, and the internal multi-point uniform expansion can effectively support the thin-walled shell, reduce the cutting deformation of the shell under force, and ensure the processing accuracy and coaxiality of the product.

[0031] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of the invention is limited to these examples; within the framework of the invention, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of the different aspects of the invention as described above, which are not provided in detail for the sake of brevity. Any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the invention should be included within the scope of protection of the invention.

Claims

1. A cutting device for the housing of an air pump, comprising a base (1) and a plurality of cutting heads (11) arranged around the base (1), characterized in that, Also includes: The support shaft (2) is located in the middle of multiple cutting heads (11), and a through chip removal channel (21) is opened inside it along the central axis. Several guide grooves (22) are opened radially through the peripheral sidewall of the support shaft (2). The axial drive rod (3) is a hollow tube that can be slidably inserted into the chip removal channel (21). The outer peripheral surface of the axial drive rod (3) is machined with a wedge-shaped drive surface (31) corresponding to the guide groove (22). The expansion blocks (5) are slidably disposed in the guide groove (22) in a corresponding manner. The inner bottom surface of the expansion blocks (511) has a force-bearing inclined surface (511) that fits against the wedge-shaped driving surface (31). When the axial driving rod (3) makes an axial displacement, the wedge-shaped driving surface (31) squeezes the force-bearing inclined surface (511) and drives the expansion blocks (5) to extend outward in the radial direction. The outer surface of the expansion blocks (5) is a clamping surface (521) for fitting against the inner wall of the air pump housing. An elastic reset member (512) is sleeved around the middle of a plurality of the expansion blocks (5) to provide a restoring force that forces the expansion blocks (5) to contract inward; The clamping surface (521) has a recessed tool clearance groove (522) for the cutting tool of the cutting head (11) to be suspended after penetrating the outer shell. The expansion block (5) has a chip removal through hole (523) that penetrates its body. The outer end of the chip removal through hole (523) is located inside the tool clearance groove (522), and the inner end passes through the side wall of the support shaft (2) and is connected to the chip removal channel (21).

2. The air pump housing cutting device according to claim 1, characterized in that, It also includes a drive motor (35), a drive screw (34) and a drive sleeve (33) fixedly installed below the support shaft (2). The output shaft of the drive motor (35) is coaxially connected to the drive screw (34) to drive the drive screw (34) to rotate. The drive sleeve (33) is threaded onto the outside of the drive screw (34) and is fixedly connected to the axial drive rod (3). When the drive motor (35) drives the drive screw (34) to rotate in place, the drive sleeve (33) moves back in a straight line along the axis of the drive screw (34) to push and pull the axial drive rod (3).

3. The air pump housing cutting device according to claim 1, characterized in that, A chip removal and conveying pipe (32) is nested and slidably arranged in the inner cavity of the axial drive rod (3). The chip removal and conveying pipe (32) is fixedly connected to the support shaft (2), so that when the axial drive rod (3) undergoes axial displacement, the chip removal and conveying pipe (32) and the axial drive rod (3) maintain relative sliding and the internal air passage is continuously connected and conveyed. The outer end of the chip removal and conveying pipe (32) is connected to a negative pressure fan (43).

4. The air pump housing cutting device according to claim 3, characterized in that, A negative pressure suction box (4) is also provided between the chip conveying pipe (32) and the negative pressure fan (43). The top of the negative pressure suction box (4) is provided with a suction opening (41), and a filter screen (42) for intercepting chips is embedded in the suction opening (41). The negative pressure fan (43) is installed on the outside of the suction opening (41) to generate negative pressure. The bottom of the negative pressure suction box (4) is provided with a chip discharge port (44), and a one-way flap (45) is installed in the chip discharge port (44). One side of the one-way flap (45) is rotatably connected to the negative pressure suction box (4). The one-way flap (45) is configured to only flip outward and downward and cannot flip upward inward to the negative pressure suction box (4), so that the intercepted chips are automatically discharged after the negative pressure disappears.

5. The air pump housing cutting device according to claim 1, characterized in that, The expansion block (5) includes an inner drive clamping block (51) and an outer quick-change clamping block (52). The drive clamping block (51) and the quick-change clamping block (52) are mutually matched and separable detachable structures. The drive clamping block (51) is slidably disposed in the guide groove (22), the force-bearing inclined surface (511) is disposed on the bottom surface of the drive clamping block (51), the quick-change clamping block (52) is detachably installed on the radial outer side of the drive clamping block (51) through the guide connection structure, and the outer peripheral surface of the quick-change clamping block (52) has a clamping surface (521) adapted to the inner cavity of the air pump housing; The chip removal through hole (523) includes segmented through holes respectively opened inside the drive clamping block (51) and the quick-change clamping block (52). When the drive clamping block (51) and the quick-change clamping block (52) are connected and locked, the segmented through holes inside the two are synchronously aligned and interconnected.

6. The air pump housing cutting device according to claim 5, characterized in that, The guide connection structure includes an axially oriented fitting connection groove (524) on the outer side of the drive clamping block (51), and a fitting connection block (513) protruding on the inner side of the quick-change clamping block (52) and matching the cross-sectional shape of the fitting connection groove (524). The cross-section of the fitting connection groove (524) is T-shaped. The quick-change clamping block (52) slides into the fitting connection groove (524) through the fitting connection block (513) in a direction parallel to the central axis of the support shaft (2).

7. The air pump housing cutting device according to claim 6, characterized in that, It also includes an auxiliary quick-change mechanism, which includes: A horizontal translation guide rail (7) is set above the base (1), a translation screw (71) is rotatably installed inside the translation guide rail (7), and a translation screw sleeve (72) is threaded onto the outside of the translation screw (71). The transfer and changing frame (74) is fixedly connected to the translation screw sleeve (72). Its bottom circumferentially distributed are gripping mating parts corresponding to all the quick-change clamping blocks (52), and the top of the quick-change clamping block (52) is provided with a gripping connection part. The translation motor (73) installed at the shaft end of the translation screw (71) drives the translation screw (71) to rotate, which in turn drives the translation screw sleeve (72) to move, thereby causing the transfer and changing frame (74) to reciprocate between the first position and the second position along the translation guide rail (7): When the transfer and changing frame (74) moves to the first position directly above the support shaft (2), it engages with the gripping connector through the gripping mating part, thereby driving a whole set of quick-change clamping blocks (52) to slide upward for disassembly or slide downward for installation. When the transfer and replacement rack (74) moves to the second position located on one side of the support shaft (2), it serves as a loading and unloading standby position for unloading the replaced quick-change clamping block (52) or for pre-connecting the quick-change clamping block (52) to be replaced.

8. The air pump housing cutting device according to claim 7, characterized in that, An anti-disengagement locking component (6) is also provided between the drive clamping block (51) and the quick-change clamping block (52) for axial positioning and locking to prevent disengagement of the quick-change clamping block (52) after it is slidably assembled into place. The anti-loosening locking component (6) includes: A mounting locking groove (63) is provided on the side of the drive clamping block (51) that fits against the quick-change clamping block (52); A locking guide sleeve (61) is horizontally set inside the quick-change clamping block (52). An elastic locking pin (611) is nested and slidably set inside the locking guide sleeve (61). The elastic locking pin (611) is set in a position corresponding to the mounting locking groove (63), and one end of it extends out and is inserted into the mounting locking groove (63) in normal state to achieve locking. A linkage inclined surface (612) is set in the middle of the rod of the elastic locking pin (611). An unlocking guide sleeve (62) is vertically set above the locking guide sleeve (61). An unlocking pressure rod (621) is nested and slidably arranged inside the unlocking guide sleeve (62). An unlocking top pressure surface (622) is provided at the bottom of the unlocking pressure rod (621). The unlocking top pressure surface (622) is attached to and cooperates with the linkage inclined surface (612). When the unlocking lever (621) is pressed down, the unlocking top surface (622) at the bottom of the unlocking lever (621) presses against the linkage inclined surface (612) to push the elastic locking pin (611) to retract inward and disengage from the mounting locking groove (63), thereby releasing the lock on the quick-change clamping block (52).

9. The air pump housing cutting device according to claim 8, characterized in that, The transfer and changing frame (74) is symmetrically provided with guide sleeves (741) and telescopic cylinders (742) located between the guide sleeves (741). A vertical guide rod (752) is nested and slidably arranged inside the guide sleeves (741). The gripping fitting is specifically a gripping fitting block (75) connected to the vertical guide rod (752). The output end of the telescopic cylinder (742) is connected to the gripping fitting block (75) to pull the gripping fitting block (75) to move up and down. The gripping connection part is specifically a fitting gripping groove (525) opened on the top end face of the quick-change clamping block (52). A magnetic traction block (526) is provided inside the fitting gripping groove (525). An electromagnet (751) corresponding to the magnetic traction block (526) is provided in the middle of the gripping fitting block (75). The gripping fitting block (75) is driven to be inserted downward into the fitting gripping groove (525) by the telescopic cylinder (742) for mechanical fitting and positioning. The magnetic connection gripping is achieved by the electromagnet (751) adsorbing the magnetic traction block (526), ​​or by pulling upward to disengage from the fitting gripping groove (525). The top of the unlocking lever (621) extends upward and protrudes from the bottom surface of the engaging gripping slot (525).

10. The air pump housing cutting device according to claim 9, characterized in that, The base (1) is provided with a storage turntable (8) at the second position, and multiple unit storage racks (81) are uniformly arranged around the storage turntable (8) in the circumferential direction above it; Each unit storage rack (81) has a vertically opening fitted storage slot (82) that matches the shape of the quick-change clamping block (52).

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