Pipe expanding and rotating mechanism of automatic pipe arranging and expanding machine

Abstract

The utility model relates to the technical field of expansion bender, especially an expansion pipe and rotating mechanism of automatic expansion bender. The expansion pipe and rotating mechanism of automatic expansion bender, including push expansion mechanism and pneumatic rotating mechanism, push expansion mechanism includes push expansion frame, push expansion subassembly and push expansion retainer, and push expansion subassembly sets up on push expansion frame, and is located between the front fixed plate and rear fixed plate of push expansion frame, and push expansion retainer is close to front fixed plate setting, and the expansion rod of push expansion subassembly passes through this push expansion retainer, and the front fixed plate and push expansion retainer are equipped with the guide mould of aluminium pipe, still including the drive module of drive push expansion subassembly to and fro in push expansion frame, pneumatic rotating mechanism includes cylinder, main shaft and main shaft box, and one end of main shaft passes through main shaft box and is connected with the bottom surface of push expansion frame, and cylinder installs at the bottom surface of push expansion frame, and the piston rod of cylinder is close to the end portion place and is connected at the outer edge of main shaft box through connecting piece. The utility model drives more stable, accurate, and the expansion pipe size is accurate and stable.

Description

Technical Field

[0001] This utility model relates to the field of sheet expansion machine technology, and in particular to an expansion and rotation mechanism for an automatic sheet expansion machine. Background Technology

[0002] Traditional automatic tube expansion machines use hydraulic power. A hydraulic cylinder pushes a push plate with Cr12 rhomboid holes for the expansion rod to pass through. The push plate drives the expansion rod to insert the aluminum tube into the arranged fins, completing the expansion. However, after the cylinder extends to the expansion position, the expansion dimensions are unstable due to the use of hydraulic power, resulting in dimensional deviations. Furthermore, the Cr12 rhomboid holes are machined using wire cutting, which has a long processing cycle and high cost.

[0003] In addition, the rotating mechanism on the automatic tube expander uses a motor as its power source. The expansion mechanism rotates through gear meshing to perform tube threading. When it stops, the inertia is large, which can easily damage the motor. Summary of the Invention

[0004] The technical problem to be solved by this utility model is: in order to solve the problems existing in the prior art in the background art, to provide an expansion and rotation mechanism for an automatic sheet expansion machine.

[0005] The technical solution adopted by this utility model to solve its technical problem is: an expansion and rotation mechanism for an automatic tube expander, including a pushing expansion mechanism and a pneumatic rotation mechanism.

[0006] The expansion mechanism includes an expansion frame, an expansion assembly, and an expansion retainer. The expansion assembly is mounted on the expansion frame and located between the front and rear fixed plates of the expansion frame. The expansion retainer is positioned close to the front fixed plate, and the expansion rod of the expansion assembly passes through the expansion retainer. The front fixed plate and the expansion retainer are equipped with guide molds for aluminum tubes. The mechanism also includes a drive module for driving the expansion assembly to move back and forth within the expansion frame.

[0007] The pneumatic rotation mechanism includes a cylinder, a main shaft, and a main shaft housing. One end of the main shaft passes through the main shaft housing and is connected to the bottom surface of the expansion frame. The cylinder is installed on the bottom surface of the expansion frame, and the piston rod of the cylinder is connected to the outer edge of the main shaft housing near its end via a connector.

[0008] Furthermore, the drive module includes a servo geared motor, a transmission assembly, two lead screws, and two guide rods. The servo geared motor is mounted on the rear fixed plate via a motor base plate. The transmission assembly includes a driving synchronous pulley, a driven synchronous pulley, and a synchronous belt wound around the driving and driven synchronous pulleys. The driving synchronous pulley is mounted on the output end of the servo geared motor. The two guide rods are respectively located near the two sides of the push-expansion frame and between the front and rear fixed plates. The lead screws are located on the outside of the guide rods. One end of the lead screw passes through the rear fixed plate and the driven synchronous pulley is mounted on the end of the lead screw. The other end of the lead screw is movably connected to the front fixed plate.

[0009] Furthermore, two belt tensioning idler pulleys are mounted side by side on the motor base plate, and an idler pulley mounting bracket is connected to the bottom of the motor base plate. An idler pulley with a seat is tunably mounted on the idler pulley mounting bracket.

[0010] Furthermore, the rear fixing plate is provided with a protective cover, and the driven synchronous pulley, belt tension idler pulley and belt seat idler pulley are all located inside the protective cover.

[0011] Furthermore, the expansion assembly includes a push plate and two sets of expansion rods connected to one side of the push plate. The push plate has a first through hole and a second through hole. A linear bearing is installed in the first through hole. The guide rod passes through the linear bearing. The lead screw nut on the lead screw passes through the second through hole and is connected to the push plate through a transition plate. Each set of expansion rods consists of several rows and columns of expansion rods.

[0012] Furthermore, a mounting plate is connected to one side of the push plate, and the mounting plate has a rhomboid hole through which the expansion rod passes.

[0013] Furthermore, the expansion retainer includes a retaining plate, the retaining plate having a mounting hole in the middle for mounting a guide mold, mold stops being provided on the front and rear surfaces of the retaining plate along both sides of the mounting hole, and a handle being provided on the top of the retaining plate.

[0014] Furthermore, the guide mold is provided with guide holes that cooperate with the expansion rod assembly that carries the aluminum tube.

[0015] Furthermore, the piston rod end of the cylinder is connected to a connecting flange fixed to the bottom surface of the push frame, and a connecting seat for connecting to the connecting parts is fixed at the outer edge of the spindle box.

[0016] Furthermore, the main shaft includes a disc portion and a shaft portion, the disc portion being connected to the bottom surface of the push-expansion frame, and the shaft portion being mounted on the main shaft box via bearings.

[0017] The beneficial effects of this utility model are:

[0018] The expansion mechanism of this utility model adopts a structure of servo geared motor + synchronous belt assembly transmission + lead screw assembly, which makes the transmission more stable and accurate, and ensures the precise and stable size of the expansion tube.

[0019] The structure of push plate plus mounting plate is adopted instead of directly setting Cr12 rhomboid holes on push plate, which reduces processing costs and processing cycle. The mounting plate with rhomboid holes is easy to process, install and replace, and can be adjusted according to product size to realize the production of multiple product sizes.

[0020] An expansion retainer is provided to ensure stability during expansion; the expansion retainer is equipped with a detachable guide mold, which can be replaced according to different products, making it highly versatile.

[0021] The pneumatic rotary mechanism uses a cylinder as the rotational power source, which has a large thrust, simple control, low cost, and easy installation. Attached Figure Description

[0022] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0023] Figure 1 This is a schematic diagram of the structure of this utility model.

[0024] Figure 2 This is a schematic diagram of the expansion mechanism in this utility model.

[0025] Figure 3 yes Figure 2 A schematic diagram of the drive module.

[0026] Figure 4 yes Figure 2 A schematic diagram of the structure of the push-up assembly.

[0027] Figure 5 yes Figure 4 A schematic diagram of the mounting plate.

[0028] Figure 6 yes Figure 2 A schematic diagram of the structure of the push-expansion cage.

[0029] Figure 7 yes Figure 2 A schematic diagram of the structure of the guide mold.

[0030] Figure 8 This is a schematic diagram of the pneumatic rotating mechanism in this utility model.

[0031] Figure 9 yes Figure 8 A schematic diagram of the structure from another direction.

[0032] Figure 10 yes Figure 8 A schematic diagram of the central spindle.

[0033] In the diagram: 1. Push-expansion mechanism; 10. Guide mold; 101. Guide hole; 11. Push-expansion frame; 111. Front fixed plate; 112. Rear fixed plate; 12. Push-expansion assembly; 121. Expansion rod; 122. Push plate; 1221. First through hole; 1222. Second through hole; 1223. Linear bearing; 123. Transition plate; 124. Mounting plate; 1241. Rhomboid hole; 13. Push-expansion retainer; 131. 1311. Holding plate; 132. Mounting hole; 133. Mold stop; 134. Handle; 15. Drive module; 16. Servo geared motor; 17. Lead screw; 18. Guide rod; 19. Motor base plate; 10. Driving synchronous pulley; 11. Driven synchronous pulley; 12. Synchronous belt; 133. Belt tensioning idler pulley; 144. Idler pulley mounting bracket; 15. Idler pulley with seat; 16. Protective cover;

[0034] 2. Pneumatic rotating mechanism; 21. Cylinder; 22. Main shaft; 221. Disc part; 222. Shaft part; 23. Main shaft box; 24. Connecting parts; 25. Connecting flange; 26. Connecting seat. Detailed Implementation

[0035] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the present invention, and therefore only show the components relevant to the present invention.

[0036] like Figure 1 , Figure 2 and Figure 8 As shown, an automatic tube expander and rotater includes an expansion mechanism 1 and a pneumatic rotating mechanism 2. The expansion mechanism 1 includes an expansion frame 11, an expansion assembly 12, and an expansion retainer 13. The expansion assembly 12 is mounted on the expansion frame 11 and located between the front fixed plate 111 and the rear fixed plate 112 of the expansion frame 11. The expansion retainer 13 is located close to the front fixed plate 111, and the expansion rod 121 of the expansion assembly 12 passes through the expansion retainer 13. The guide mold 10 with aluminum tubes is provided on the expansion retainer 13 and the expansion frame 111; it also includes a drive module 14 that drives the expansion assembly 12 to move back and forth in the expansion frame 11; the pneumatic rotation mechanism 2 includes a cylinder 21, a spindle 22 and a spindle box 23, one end of the spindle 22 passes through the spindle box 23 and is connected to the bottom surface of the expansion frame 11, the cylinder 21 is installed on the bottom surface of the expansion frame 11, and the piston rod of the cylinder 21 is connected to the outer edge of the spindle box 23 near the end through a connector 24.

[0037] like Figure 2 and Figure 3As shown, the drive module 14 includes a servo geared motor 141, a transmission assembly, two lead screws 142, and two guide rods 143. The servo geared motor 141 is mounted on the rear fixed plate 112 via a motor base plate 144. The transmission assembly includes a driving synchronous pulley 145, a driven synchronous pulley 146, and a synchronous belt 147 wound around the driving synchronous pulley 145 and the driven synchronous pulley 146. The driving synchronous pulley 145 is mounted on the output end of the servo geared motor 141. The two guide rods 143 are respectively located near the two sides of the push-expansion frame 11 and between the front fixed plate 111 and the rear fixed plate 112. The lead screws 142 are located on the outside of the guide rods 143. One end of the lead screw 142 passes through the rear fixed plate 112 and the driven synchronous pulley 146 is mounted on the end. The other end of the lead screw 142 is movably connected to the front fixed plate 111.

[0038] Additionally, two belt tensioning idler pulleys 148 are mounted side-by-side on the motor base plate 144 to support and change the direction of the synchronous belt 147. An idler pulley mounting bracket 149 is connected to the bottom of the motor base plate 144, on which a seated idler pulley 1410 is arbitrarily mounted. The seated idler pulley 1410 is mounted on the idler pulley mounting bracket 149 by a screw, and its height can be adjusted to support the synchronous belt 147. A protective cover 1411 is provided on the rear fixing plate 112, within which the driven synchronous pulley 146, the belt tensioning idler pulleys 148, and the seated idler pulley 1410 are all located. The protective cover 1411 improves the stability and safety of the transmission system, optimizes transmission performance, and reduces maintenance costs.

[0039] like Figure 4 As shown, the expansion assembly 12 includes a push plate 122 and two sets of expansion rods connected to one side of the push plate 122. The push plate 122 has a first through hole 1221 and a second through hole 1222. A linear bearing 1223 is installed in the first through hole 1221. The guide rod 143 passes through the linear bearing 1223. The lead screw nut on the lead screw 142 passes through the second through hole 1222 and is connected to the push plate 122 through the transition plate 123. In this embodiment, the expansion rod assembly consists of expansion rods 121 arranged in four rows and five columns.

[0040] like Figure 4 and Figure 5 As shown, a mounting plate 124 is connected to one side of the push plate 122. The mounting plate 124 has a rhomboid hole 1241 for the expansion rod 121 to pass through. The rhomboid hole 1241 is located on the mounting plate 124, which is convenient to process. The mounting plate 124 can also be replaced according to the structure of the expansion rod assembly.

[0041] like Figure 6As shown, the expansion retainer 13 includes a retaining plate 131. The retaining plate 131 has a mounting hole 1311 in the middle for mounting the guide mold 10. Mold blocks 132 are provided on the front and rear surfaces of the retaining plate 131 on both sides of the mounting hole 1311. The mold blocks 132 limit the guide mold 10 to ensure the stability of the entire expansion retainer 13 during the expansion process. The top of the retaining plate 131 is provided with a handle 133, which can be used to adjust the position of the expansion retainer 13 on the guide rod 143.

[0042] The retaining plate 131 also has through holes on both sides for mounting linear bearings 1223, and the guide rod 143 passes through the linear bearings 1223. The front and rear surfaces of the guide mold 10 on both sides of the front fixed plate 111 are also provided with mold stops 132 to ensure the stability of the aluminum tube during the expansion process.

[0043] like Figure 7 As shown, the guide mold 10 has a guide hole 101 that cooperates with the expansion rod assembly that carries the aluminum tube. The guide hole 101 is a four-layer groove that is connected end to end.

[0044] like Figure 9 As shown, the piston rod end of the cylinder 21 in the pneumatic rotary mechanism 2 is connected to a connecting flange 25 fixed to the bottom surface of the push-expansion frame 11, and a connecting seat 26 connected to the connecting piece 24 is fixed at the outer edge of the main shaft box 23. Figure 10 As shown, the spindle 22 includes a disc portion 221 and a shaft portion 222. The disc portion 221 is connected to the bottom surface of the push frame 11, and the shaft portion 222 is mounted on the spindle box 23 via bearings.

[0045] The expansion mechanism 1 is fixed on the pneumatic rotary mechanism 2 as an expansion platform. It forms a lead screw guide column assembly via a front fixed plate 111, a rear fixed plate 112, a lead screw 142, and a guide rod 143. A push plate 122 (with increased thickness compared to existing technology) is connected to the lead screw nut via a transition plate 123. A linear bearing 1223 mounted on the push plate 122 is fitted onto the lead screw 142. The power of the servo reduction motor 141 is transmitted to the lead screw 142 via a synchronous belt assembly, causing the expansion assembly 12 to move along the guide rod 143 under the action of the lead screw 142. The tail end of the expansion rod 121 is fixed to the push plate 122 with bolts. The position of the tail end of the expansion rod 121 is limited by the oblique hole 1241 on the mounting plate 124 to prevent the expansion rod 121 from rotating as it moves with the push plate 122. The guide mold 10 for aluminum tubes is installed in the front fixed plate 111 and the expansion retainer 13. After the aluminum tube is inserted into the guide mold 10, during tube expansion, the guide hole 101 on the guide mold 10 jams the aluminum tube to move forward, so that the aluminum tube enters the fin to complete the tube expansion. After the tube expansion is completed, the servo reduction motor 141 reverses and drives the push plate 122 to move backward, so that the expansion rod 121 exits the aluminum tube, thus completing the tube expansion process.

[0046] Using a servo geared motor 141 as the power source for tube expansion makes the tube expansion process smoother and more precise, resulting in a high product yield rate. The use of a mounting plate 124 with oblique holes 1241 significantly reduces costs and processing time, shortens the manufacturing and assembly cycle, lowers costs, and enhances the competitiveness of the equipment.

[0047] The pneumatic rotating mechanism 2 uses a cylinder 21 as the rotational power. The cylinder 21 drives the expansion mechanism 1 to rotate, completing the tube loading and expansion preparation work. It is easy to install and has low cost.

[0048] Based on the above-described preferred embodiments of this utility model, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. An expansion and rotation mechanism for an automatic tube expander, characterized in that: Includes a thrust mechanism and a pneumatic rotation mechanism. The expansion mechanism includes an expansion frame, an expansion assembly, and an expansion retainer. The expansion assembly is mounted on the expansion frame and located between the front and rear fixed plates of the expansion frame. The expansion retainer is positioned close to the front fixed plate, and the expansion rod of the expansion assembly passes through the expansion retainer. The front fixed plate and the expansion retainer are equipped with guide molds for aluminum tubes. The mechanism also includes a drive module for driving the expansion assembly to move back and forth within the expansion frame. The pneumatic rotation mechanism includes a cylinder, a main shaft, and a main shaft housing. One end of the main shaft passes through the main shaft housing and is connected to the bottom surface of the expansion frame. The cylinder is installed on the bottom surface of the expansion frame, and the piston rod of the cylinder is connected to the outer edge of the main shaft housing near its end via a connector.

2. The tube expansion and rotation mechanism of the automatic tube expander according to claim 1, characterized in that: The drive module includes a servo geared motor, a transmission assembly, two lead screws, and two guide rods. The servo geared motor is mounted on the rear fixed plate via a motor base plate. The transmission assembly includes a driving synchronous pulley, a driven synchronous pulley, and a synchronous belt wound around the driving and driven synchronous pulleys. The driving synchronous pulley is mounted on the output end of the servo geared motor. The two guide rods are respectively located near the two sides of the push-expansion frame and between the front and rear fixed plates. The lead screws are located on the outside of the guide rods. One end of the lead screw passes through the rear fixed plate and the driven synchronous pulley is mounted on the end of the lead screw. The other end of the lead screw is movably connected to the front fixed plate.

3. The tube expansion and rotation mechanism of the automatic tube expander according to claim 2, characterized in that: Two belt tensioning idler pulleys are mounted side by side on the motor base plate. An idler pulley mounting bracket is connected to the bottom of the motor base plate, and an idler pulley with a seat can be adjusted and mounted on the idler pulley mounting bracket.

4. The tube expansion and rotation mechanism of the automatic tube expander according to claim 3, characterized in that: The rear fixed plate is provided with a protective cover, and the driven synchronous pulley, belt tension idler pulley and belt seat idler pulley are all located inside the protective cover.

5. The tube expansion and rotation mechanism of the automatic tube expander according to claim 2, characterized in that: The expansion assembly includes a push plate and two sets of expansion rods connected to one side of the push plate. The push plate has a first through hole and a second through hole. A linear bearing is installed in the first through hole. The guide rod passes through the linear bearing. The lead screw nut on the lead screw passes through the second through hole and is connected to the push plate through a transition plate. Each set of expansion rods consists of several rows and columns of expansion rods.

6. The tube expansion and rotation mechanism of the automatic tube expander according to claim 5, characterized in that: A mounting plate is connected to one side of the push plate, and the mounting plate has a rhomboid hole for the expansion rod to pass through.

7. The tube expansion and rotation mechanism of the automatic tube expander according to claim 5, characterized in that: The expansion retainer includes a retaining plate, with an installation hole in the middle for mounting a guide mold. Mold blocks are provided on the front and rear surfaces of the retaining plate along both sides of the installation hole, and a handle is provided on the top of the retaining plate.

8. The tube expansion and rotation mechanism of the automatic tube expander according to claim 7, characterized in that: The guide mold has guide holes that cooperate with the expansion rod assembly that carries the aluminum tube.

9. The tube expansion and rotation mechanism of the automatic tube expander according to claim 1, characterized in that: The piston rod end of the cylinder is connected to a connecting flange fixed to the bottom surface of the expansion frame, and a connecting seat for connecting to the connecting parts is fixed at the outer edge of the spindle box.

10. The tube expansion and rotation mechanism of the automatic tube expander according to claim 1, characterized in that: The main shaft includes a disc portion and a shaft portion. The disc portion is connected to the bottom surface of the push-expansion frame, and the shaft portion is mounted on the main shaft box via bearings.

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