Expanding mechanism of horizontal tube expander

Abstract

The tube expanding mechanism of the horizontal tube expanding machine comprises an array of expansion rods, a power seat and its driving assembly, an expansion rod locking assembly, an array of power seat and its driving assembly, an array of step expansion rod locking assemblies, a hanging seat and an expansion rod suspension locking assembly; the expansion rod passes through the expansion rod suspension locking assembly, the hanging seat, the second step expansion rod locking assembly, the second step power seat, the power seat, the expansion rod locking assembly, the first step power seat and the first step expansion rod locking assembly in sequence, and an expansion head, a limiting boss at different positions and a suspension limiting boss are arranged on the expansion rod; the first step power seat and its driving assembly and the second step power seat and its driving assembly are respectively mounted on both sides of the power seat; the expansion rod locking assembly comprises a mounting plate, a locking plate, a locking plate cover plate and a locking plate driving assembly, the locking plate is mounted between the mounting plate and the locking plate cover plate and can be driven by the locking plate driving assembly to lock or unlock the limiting boss of the expansion rod; the suspension limiting boss of the expansion rod is locked or unlocked by the hanging seat and the expansion rod suspension locking assembly.

Description

Technical Field

[0001] The invention relates to a component of a horizontal tube expander, in particular to a tube expanding mechanism of the tube expander. Background Art

[0002] The tube expanding mechanism of the existing horizontal tube expanding machine can only be used for expanding neat workpieces, but not for expanding stepped workpieces. In actual tube expanding, various types of workpieces including stepped workpieces are often encountered. Therefore, it is necessary to design a tube expanding mechanism that can adapt to different workpieces. Summary of the invention

[0003] The technical problem to be solved by the present invention is to overcome the above-mentioned defects of the prior art and provide a tube expanding mechanism of a horizontal tube expanding machine, the position of which expansion rod is easy to adjust.

[0004] The technical solution adopted by the present invention to solve the above technical problems is:

[0005] A tube expansion mechanism of a horizontal tube expander comprises an array of expansion rods, a power seat and a driving assembly thereof, an expansion rod locking assembly, a first-step power seat and a driving assembly thereof, a first-step expansion rod locking assembly, a second-step power seat and a driving assembly thereof, a second-step expansion rod locking assembly, a hanging seat and an expansion rod hanging locking assembly; the expansion rod passes through the expansion rod hanging locking assembly, the hanging seat, the second-step expansion rod locking assembly, the second-step power seat, the power seat, the expansion rod locking assembly, the first-step power seat and the first-step expansion rod locking assembly in sequence, and an expansion head is arranged on the expansion rod, The limiting boss and the hanging limiting boss are in the same position; the first-step power seat and its driving assembly and the second-step power seat and its driving assembly are respectively installed on both sides of the power seat; the expansion rod locking assembly, the first-step expansion rod locking assembly and the second-step expansion rod locking assembly all include a mounting plate, a locking plate, a locking plate cover plate and a locking plate driving assembly, the locking plate is installed between the mounting plate and the locking plate cover plate and can be driven by the locking plate driving assembly to lock or unlock the limiting boss of the expansion rod; the hanging limiting boss of the expansion rod is locked or unlocked by the hanging seat and the expansion rod hanging locking assembly.

[0006] More specifically, the driving assembly of the power base includes a driver and a transmission mechanism, and the driver drives the power base to move through the transmission mechanism.

[0007] Preferably, the driving assembly of the power seat includes a motor, a driving gear, a driven gear, a screw and a screw nut. The motor is mounted on the fuselage, and the driving gear is mounted on its output shaft. The driven gear is mounted on the screw and meshes with the driving gear. The screw is supported by the fuselage for rolling, and the screw nut is mounted on the power seat and is sleeved on the outside of the screw.

[0008] In order to ensure the smooth movement of the power base, a guide mechanism is provided between the power base and the body, more specifically a slider and rail guide mechanism.

[0009] More specifically, the driving assembly of the first step power seat includes a driver and a transmission mechanism, and the driver drives the first step power seat to move through the transmission mechanism.

[0010] Preferably, the driving assembly of the first step power seat includes a motor, a driving sprocket, a transmission sprocket, a driven sprocket, a screw and a screw nut. The motor is mounted on the power seat, and a driving sprocket is mounted on its output shaft. The transmission sprocket is rollingly supported on the power seat by the sprocket seat. The screw is rollingly supported by the power seat, and a driven sprocket is mounted on one end of the screw, and the other end passes through the first step power seat. The screw nut is sleeved outside the screw and mounted on the first step power seat. The motor drives the driving sprocket to rotate, and drives the driven sprocket to rotate through the transmission sprocket, thereby driving the screw to rotate, so that the screw nut sleeved thereon drives the first step power seat to move.

[0011] In order to ensure the smooth movement of the first-step power seat, a guide mechanism is provided between the power seat and the first-step power seat, more specifically a slider rail guide mechanism.

[0012] The second step power seat driving assembly has the same structure as the first step power seat driving assembly.

[0013] More specifically, an expansion rod locking piece is provided on the lock plate, and the expansion rod is locked or unlocked by the expansion rod locking piece. Preferably, the expansion rod locking piece is a lock hole, and the lock hole includes a large hole and a small hole connected together, the large hole allows the expansion rod to pass through, and the small hole just clamps the expansion rod, and the lock plate driving assembly drives the lock plate to connect its large hole or small hole with the expansion rod, so that the expansion rod is unlocked or locked, so that the expansion rod does not move with or can move with the power seat.

[0014] It also includes a guide assembly, which includes a guide rod, a guide frame plate, a guide sleeve, a buffer column, and a chain. One end of the guide rod is installed on the flaring seat, and the other end is installed on the hanging seat. The guide sleeve is inserted into the outside of the guide rod and the inside of the guide frame plate, and is installed on the guide frame plate. The buffer column is installed on the guide frame plate. Each of the guide frame plates is connected by a synchronization mechanism, which can be specifically a chain mechanism, wherein the two guide frame plates are respectively connected to the first step power seat and the second step power seat through a chain.

[0015] In order to ensure smooth movement of the guide frame, a guide mechanism is provided between each guide frame and the body, more specifically a slider and rail guide mechanism.

[0016] When expanding the tube, the expansion rod is divided into two parts according to the needs, one part is for expansion and the other part is not for expansion. The suspension limit boss of the expansion rod that is not for expansion is located on the right side of the expansion rod suspension locking assembly and is locked by its lock plate. When expanding the tube, the expansion rod that is not for expansion will not move with the power seat, and the one that is for expansion is on the left side.

[0017] In the process of the power seat moving forward to expand the tube, the second-step power seat gradually pulls apart the guide frame plate between the second-step power seat and the hanging seat through the chain to support the expansion rod that has not expanded the tube. At the same time, the guide frame plate between the first-step power seat and the expansion seat is compressed and contacted as the expansion rod of the expanded tube gradually extends into the workpiece, and they contact each other through the buffer column to avoid direct contact and vibration of the guide frame plates.

[0018] When the power seat finishes expanding the tube and retracts, in contrast to the above action, the first-step power seat pulls open the guide frame plate between the first-step power seat and the flaring seat through the chain as the expansion rod of the expansion tube gradually withdraws from the workpiece, supports and guides it, and makes the expansion rod of the expansion tube retract, while the guide frame plate between the second-step power seat and the hanging seat is gradually compressed.

[0019] Compared with the prior art, the advantage of the present invention is that by setting up an array of power seats and their drive components and corresponding expansion rod locking components, the corresponding expansion rods can be selectively locked or moved, so that the position of the expansion tube can be conveniently adjusted as the position of the workpiece to be expanded changes. Therefore, it is convenient to adjust the position of the expansion tube to meet the expansion needs of different workpieces. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a three-dimensional schematic diagram of an embodiment of the present invention when applied to a horizontal tube expander.

[0021] Figure 2 It is a schematic diagram of the three-dimensional structure of the tube expanding mechanism of the horizontal tube expander according to an embodiment of the present invention.

[0022] Figure 3 It is a structural schematic diagram of the expansion rod of the tube expansion mechanism according to an embodiment of the present invention.

[0023] Figure 4 It is a schematic structural diagram of a power seat of a tube expansion mechanism according to an embodiment of the present invention.

[0024] Figure 5 It is a structural schematic diagram of the expansion rod locking assembly of the tube expansion mechanism according to an embodiment of the present invention.

[0025] Figure 6 It is a schematic structural diagram of a workpiece to be expanded according to an embodiment of the present invention.

[0026] Figure 7 It is a structural schematic diagram of a group of expansion tubes during expansion according to an embodiment of the present invention.

[0027] Figure 8 Schematic diagram of the structure of the locking plate according to an embodiment of the present invention. DETAILED DESCRIPTION

[0028] The present invention is further described in detail below with reference to the accompanying drawings.

[0029] like Figure 1 As shown, a horizontal tube expander comprises: a body 1, a tube expansion mechanism 2, a step-by-step expansion mechanism 3, a clamping mechanism 4, a receiving mechanism 5, a material pressing mechanism 6, a platen mechanism 7, and a workpiece intermediate conveying mechanism 8. Since the present application only involves the tube expansion mechanism 2, and the tube expansion mechanism can also be applied to other types of tube expanders, other mechanisms are not described in detail.

[0030] like Figure 2 , 3 As shown in Figures 4 and 5, the expansion tube mechanism 2 includes an expansion rod 201, a power seat 202 and a driving assembly thereof, an expansion rod locking assembly 203, a first-step power seat 204 and a driving assembly thereof, a first-step expansion rod locking assembly 205, a second-step power seat 206 and a driving assembly thereof, a second-step expansion rod locking assembly 207, a guide assembly 208, a hanging seat 209 and an expansion rod suspension locking assembly 210.

[0031] The expansion rod 201 passes through the expansion rod suspension locking assembly 210, the hanging seat 209, the second step expansion rod locking assembly 207, the second step power seat 206, the power seat 202, the expansion rod locking assembly 203, the first step power seat 204, and the first step expansion rod locking assembly 205 in sequence. The expansion rod 201 is provided with an expansion head 2011, a limiting boss 2012 and a suspension limiting boss 2013, and the suspension limiting boss 2013 can be locked by the expansion rod suspension locking assembly 210. According to different working conditions, the position of the limiting boss 212 is different, and the limiting boss 212 can be locked by the second step expansion rod locking assembly 207, the expansion rod locking assembly 203, and the first step expansion rod locking assembly 205.

[0032] The driving assembly of the power base 202 includes a motor 2021 , a driving gear 2022 , a driven gear 2023 , a screw 2024 , and a screw nut 2025 .

[0033] The motor 2021 is mounted on the body 1, and a driving gear 2022 is mounted on its output shaft. The driven gear 2023 is mounted on the screw rod 2024 and meshes with the driving gear 2022. The screw rod 2024 is supported by the body 1 for rolling. The screw rod nut 2025 is mounted on the power seat 202 and is sleeved outside the screw rod 2024. The motor 2021 drives the driving gear 2022 to rotate, so that the driven gear 2023 drives the screw rod 2024 to rotate, and the screw rod nut 2025 sleeved thereon drives the power seat 202 to move.

[0034] In order to ensure the smooth movement of the power base 202 , a slider and rail guide mechanism 2026 is provided between the power base 202 and the body 1 .

[0035] The first step power seat 204 and its driving assembly and the second step power seat 206 and its driving assembly are respectively installed on both sides of the power seat 202 .

[0036] The driving mechanism of the first step power seat 204 includes a motor 2041 , a driving sprocket 2042 , a transmission sprocket 2043 , a driven sprocket 2044 , a screw 2045 , and a screw nut 2046 .

[0037] The motor 2041 is mounted on the power seat 202, and a driving sprocket 2042 is mounted on its output shaft. The transmission sprocket 2043 is rollingly supported on the power seat 202 by the sprocket seat. The screw rod 2045 is rollingly supported by the power seat 202, and a driven sprocket 2044 is mounted on one end of the screw rod 2045, and the other end passes through the first-step power seat 204. The screw rod nut 2046 is sleeved outside the screw rod 2045 and is mounted on the first-step power seat 204. The motor 2041 drives the driving sprocket 2042 to rotate, and drives the driven sprocket 2044 to rotate through the transmission sprocket 2043, thereby driving the screw rod 2045 to rotate, so that the screw rod nut 2046 sleeved thereon drives the first-step power seat 204 to move.

[0038] In order to ensure smooth movement of the first-step power seat 204 , a slider rail guide mechanism 2047 is provided between the power seat 202 and the first-step power seat 204 .

[0039] The driving assembly of the second step power seat 206 has the same structure as the driving mechanism of the first step power seat 204, and will not be described again here.

[0040] The moving distances of the first step power seat 204 and the second step power seat 206 are determined by the height differences h1 and h2 of the step workpieces.

[0041] The expansion rod locking assembly 203 includes a mounting plate 2031, a locking plate 2032, a locking plate cover 2033 and a locking plate driving assembly 2034. The locking plate 2032 is installed between the mounting plate 2031 and the locking plate cover 2033 and can be driven by the locking plate driving assembly 2034 to lock or unlock the limiting boss 2012 of the expansion rod. Specifically, an expansion rod locking piece is arranged on the locking plate, and the expansion rod is locked or unlocked by the expansion rod locking piece. In this embodiment, the expansion rod locking piece is a locking hole, and the locking hole includes a large hole 20321 and a small hole 20322 connected together (see Figure 8 ), the large hole 20321 allows the expansion rod 201 to pass through, and the small hole 20322 just clamps the expansion rod 201, and the lock plate driving assembly 2034 drives the lock plate to connect its large hole or small hole with the expansion rod, thereby unlocking or locking the corresponding expansion rod 201. Therefore, the expansion rod 201 does not move with or can move with the power seat 202.

[0042] like Figure 8As shown, the locking plate 2032 is also provided with a waist-shaped hole 20323 for allowing the expansion rod to pass through, and a waist-shaped hole 20324 for allowing the expansion rod limiting boss 2012 to pass through.

[0043] The structural composition of the first step expansion rod locking assembly 205, the second step expansion rod locking assembly 207 and the expansion rod suspension locking assembly 210 is the same as the structural composition of the expansion rod locking assembly 203, and also includes a mounting plate, a locking plate, a locking plate cover plate and a locking plate driving assembly. However, in order to accommodate expansion rods with different positions of the limiting boss 2012 and different needs of workpiece steps, the positions of the locking holes and waist-shaped holes on the locking plates in different locking assemblies will be different.

[0044] The guide assembly 208 includes a guide rod 2081, a guide frame plate 2082, a guide sleeve 2083, a buffer column 2084, and a chain.

[0045] One end of the guide rod 2081 is mounted on the flaring seat, and the other end is mounted on the hanging seat 209. The guide sleeve 2083 is sleeved outside the guide rod 2081 and inside the guide frame plate 2082, and is mounted on the guide frame plate 2082. The buffer column 2084 is mounted on the guide frame plate 2082. Each of the guide frames 2082 is connected by a chain, and two guide frames 2082 are respectively connected to the first step power seat 204 and the second step power seat 206 by the chain.

[0046] In order to ensure smooth movement of the guide frame, a slider and rail guide mechanism 2086 is provided between each guide frame 2082 and the fuselage 1.

[0047] When expanding the tube, the expansion rod 201 is divided into two parts according to the need, one part is for expanding the tube and the other part is not for expanding the tube. The suspension limit boss 2013 of the expansion rod 201' that is not for expanding the tube is located on the right side of the expansion rod suspension locking assembly 210 and is locked by its locking plate. When expanding the tube, the expansion rod that is not for expanding the tube will not move with the power seat 202, and the expansion rod that is for expanding the tube is on the left side, as shown in the state diagram Figure 7 shown.

[0048] like Figure 6 The three rows of stepped workpieces shown, from top to bottom, are Figure 7 The three rows of expansion rods 201 correspond to each other, and the state of each row of expansion rods 201 being locked by the locking assembly is shown in the figure Figure 7As shown, the three rows of expansion rods are at the same height. After adjustment, the tube expansion action can be performed, and the power seat 202 drives the three rows of expansion rods 201 to move and expand the tubes. The three rows of tubes are expanded to the bottom at the same time. In this process, the first-step power seat 204 moves relative to the power seat at a certain speed at the same time, and the speed direction is the same, while the second-step power seat 206 also moves relative to the power seat at a certain speed at the same time, and the speed direction is opposite. Therefore, in the same time, the expansion rod 201 corresponding to the longest row of tubes has a fast expansion speed, and the expansion rod 201 corresponding to the shortest row of tubes has the slowest expansion speed. After all three rows of workpieces are expanded, the power seat 202 returns to the initial position. During this process, the first-step power seat 204 moves relative to the power seat at a certain speed in the same direction, and the second-step power seat 206 also moves relative to the power seat at a certain speed in the opposite direction. Therefore, in the same period of time, the expansion rod 201 corresponding to the longest row of tubes has a fast expansion speed, and the expansion rod 201 corresponding to the shortest row of tubes has the slowest expansion speed. In this way, the expansion rods 201 to be expanded return to the same position at the same time, waiting for the next expansion.

[0049] If the workpieces have the same height, which is commonly referred to as flat expansion, the first-step power seat 204 and the second-step power seat 206 do not need to be moved and can be omitted.

[0050] During the process of the power seat 202 moving forward to expand the tube, the second-step power seat 206 gradually pulls open the guide frame plate 2082 between the second-step power seat 206 and the hanging seat 209 through the chain to support the expansion rod 201' that has not expanded the tube. At the same time, the guide frame plate 2082 between the first-step power seat 204 and the expansion seat is compressed and contacted as the expansion rod 201 of the expanded tube gradually extends into the workpiece, and they contact each other through the buffer column 2084 to avoid direct contact and vibration of the guide frame plate 2082.

[0051] When the power seat 202 finishes expanding the tube and retracts, opposite to the above action, the first-step power seat 204 uses a chain to pull open the guide frame plate 2082 between the first-step power seat 204 and the expansion seat as the expansion rod 201 of the expansion tube gradually withdraws from the workpiece, supporting and guiding the expansion rod 201 of the expansion tube to retract, while the guide frame plate 2082 between the second-step power seat 206 and the hanging seat 209 is gradually compressed.

[0052] When expanding the heat exchanger workpiece, one end of the heat exchanger workpiece is clamped and positioned by the clamp mechanism, and the other end is supported and positioned by a plurality of receivers installed on the receiving seat to ensure smooth expansion. Since there are many types and structures of clamp mechanisms and receivers, there are many existing products that only support and position the heat exchanger workpiece, which is not the improvement content of this application, and therefore, it will not be expanded here.

Claims

1. A tube expanding mechanism of a horizontal tube expanding machine, characterized in that: It includes an array of expansion rods, a power seat and its driving assembly, an expansion rod locking assembly, a first-step power seat and its driving assembly, a first-step expansion rod locking assembly, a second-step power seat and its driving assembly, a second-step expansion rod locking assembly, a hanging seat and an expansion rod suspension locking assembly; the expansion rod passes through the expansion rod suspension locking assembly, the hanging seat, the second-step expansion rod locking assembly, the second-step power seat, the power seat, the expansion rod locking assembly, the first-step power seat, and the first-step expansion rod locking assembly in sequence, and an expansion head and limit switches at different positions are arranged on the expansion rod. boss and suspension limit boss; the first-step power seat and its driving assembly and the second-step power seat and its driving assembly are respectively installed on both sides of the power seat; the expansion rod locking assembly, the first-step expansion rod locking assembly, and the second-step expansion rod locking assembly all include a mounting plate, a locking plate, a locking plate cover plate and a locking plate driving assembly, the locking plate is installed between the mounting plate and the locking plate cover plate and can be driven by the locking plate driving assembly to lock or unlock the limit boss of the expansion rod; the suspension limit boss of the expansion rod is locked or unlocked by the hanging seat and the expansion rod suspension locking assembly.

2. The tube expanding mechanism of the horizontal tube expanding machine according to claim 1, characterized in that: The driving assembly of the power seat includes a driver and a transmission mechanism, and the driver drives the power seat to move through the transmission mechanism.

3. The tube expanding mechanism of the horizontal tube expanding machine according to claim 2, characterized in that: The driving assembly of the power seat includes a motor, a driving gear, a driven gear, a screw and a screw nut. The motor is installed on the fuselage, and the driving gear is installed on its output shaft. The driven gear is installed on the screw and meshes with the driving gear. The screw is supported by the fuselage in a rolling manner. The screw nut is installed on the power seat and is sleeved on the outside of the screw.

4. The tube expanding mechanism of the horizontal tube expanding machine according to claim 3, characterized in that: A guide mechanism is arranged between the power seat and the fuselage.

5. The tube expanding mechanism of the horizontal tube expanding machine according to claim 1, characterized in that: The driving assembly of the first-step power seat includes a driver and a transmission mechanism, and the driver drives the first-step power seat to move through the transmission mechanism.

6. The tube expanding mechanism of the horizontal tube expanding machine according to claim 5, characterized in that: The driving assembly of the first-step power seat includes a motor, a driving sprocket, a transmission sprocket, a driven sprocket, a screw and a screw nut. The motor is installed on the power seat, and a driving sprocket is installed on its output shaft. The transmission sprocket is rollingly supported on the power seat by the sprocket seat. The screw is rollingly supported by the power seat, one end of which is installed with a driven sprocket, and the other end passes through the first-step power seat. The screw nut is sleeved outside the screw and installed on the first-step power seat. The motor drives the driving sprocket to rotate, and drives the driven sprocket to rotate through the transmission sprocket, thereby driving the screw to rotate, so that the screw nut sleeved thereon drives the first-step power seat to move.

7. The tube expanding mechanism of the horizontal tube expanding machine according to claim 1, characterized in that: An expansion rod locking piece is arranged on the lock plate, and the expansion rod is locked or unlocked by the expansion rod locking piece.

8. The tube expanding mechanism of the horizontal tube expanding machine according to claim 7, characterized in that: The expansion rod locking piece is a lock hole, which includes a large hole and a small hole connected together. The large hole allows the expansion rod to pass through, and the small hole just clamps the expansion rod. The lock plate driving assembly drives the lock plate to connect its large hole or small hole with the expansion rod, thereby unlocking or locking the expansion rod.

9. The tube expanding mechanism of the horizontal tube expanding machine according to claim 1, characterized in that: It also includes a guide assembly, which includes a guide rod, a guide frame plate, a guide sleeve, a buffer column, and a chain. One end of the guide rod is installed on the flaring seat, and the other end is installed on the hanging seat. The guide sleeve is inserted into the outside of the guide rod and the inside of the guide frame plate and is installed on the guide frame plate. The buffer column is installed on the guide frame plate, and each of the guide frame plates is connected by a synchronization mechanism.

10. The tube expanding mechanism of the horizontal tube expanding machine according to claim 9, characterized in that: The synchronization mechanism is a chain mechanism, wherein the two guide frame plates are respectively connected to the first step power seat and the second step power seat through chains.

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