Compression device and tube expander

Abstract

The present invention discloses a clamping device, comprising a mounting seat, a pressure plate, a connecting rod assembly and a first driving mechanism. The pressure plate has a first position close to the mounting seat and a second position away from the mounting seat. The connecting rod assembly is arranged between the mounting seat and the pressure plate, and the connecting rod assembly includes a first connecting rod, a second connecting rod, a third connecting rod and a fourth connecting rod, the first connecting rod having a first extension rod, and the second connecting rod having a second extension rod. In the above structure, the first driving mechanism can drive the pressure plate to move between the first position and the second position through the connecting rod assembly. When the pressure plate moves to the second position, the pressure plate can press the fin on the work station. At this time, the fourth connecting rod and the second extension rod can press against the pressure plate, so that the clamping device can better press against the fin, thereby facilitating the processing of the fin. In addition, the present invention also discloses a tube expander having the above-mentioned clamping device.

Description

Technical Field

[0001] The present invention relates to the technical field of tube expanders, and in particular to a pressing device and a tube expander. Background Art

[0002] When using a tube expander to expand or flare fins, or to install copper tubes, the fins must first be secured to the workstation using a clamping device. Existing clamping devices typically hinge a pressure plate directly to the machine frame, which rotates to clamp the fins to the workstation. However, this method provides limited clamping force, especially for larger fins, and can lead to loose clamping, hindering fin processing. Summary of the Invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides a pressing device that can better press the fins and facilitate the processing of the fins.

[0004] The present invention also provides a tube expander having the above-mentioned fin pressing device.

[0005] According to the first aspect of the present invention, the clamping device of the embodiment includes: a mounting seat; a pressing plate, the pressing plate having a first position close to the mounting seat and a second position away from the mounting seat; a connecting rod assembly, including a first connecting rod, a second connecting rod, a third connecting rod and a fourth connecting rod, the first connecting rod and the third connecting rod are arranged side by side and are rotatably connected to the mounting seat, one end of the second connecting rod is rotatably connected to the free end of the first connecting rod, and the other end of the second connecting rod is rotatably connected to the free end of the third connecting rod, the first connecting rod has a first extension rod at an end away from the mounting seat, the free end of the first extension rod is rotatably connected to the fourth connecting rod, the other end of the fourth connecting rod is rotatably connected to the pressing plate, the second connecting rod has a second extension rod at an end away from the third connecting rod, the free end of the second extension rod is rotatably connected to the pressing plate, and the fourth connecting rod and the second extension rod are arranged side by side; a first driving mechanism is provided on the first connecting rod or the third connecting rod, the output end of the first driving mechanism is rotatably connected to the fourth connecting rod or the second extension rod, and the first driving mechanism can drive the pressing plate to move between the first position and the second position.

[0006] The pressing device according to the embodiment of the present invention has at least the following beneficial effects:

[0007] By setting up a connecting rod assembly, when working, the first driving mechanism can drive the pressure plate to move between the first position and the second position. When the pressure plate moves to the second position, the pressure plate can press the fin on the work station. At this time, the fourth connecting rod and the second extension rod can press the pressure plate, so that the pressing device can better press against the fin, thereby facilitating the processing of the fin.

[0008] According to some embodiments of the present invention, there are two groups of connecting rod assemblies, and the two groups of connecting rod assemblies are arranged side by side and spaced apart between the mounting seat and the pressure plate.

[0009] According to some embodiments of the present invention, the first driving mechanism is located between the two groups of the connecting rod assemblies, and the first driving mechanism is capable of driving the two groups of the connecting rod assemblies to move synchronously.

[0010] According to some embodiments of the present invention, it is characterized in that the fourth connecting rod is provided with a first buffer block capable of abutting against the pressure plate.

[0011] According to the second embodiment of the present invention, the tube expander includes: a frame; at least one group of clamping assemblies, each group of the clamping assemblies includes at least one clamping device according to any one of claims 1 to 4, and the mounting base of each of the clamping devices is installed on the frame.

[0012] The tube expander according to the embodiment of the present invention has at least the following beneficial effects:

[0013] By providing at least one set of clamping assemblies, each set of clamping assemblies includes at least one clamping device of the above embodiment. The clamping device of the above embodiment can better press against the fins, thereby facilitating the processing of the fins and making the tube expander have higher working efficiency.

[0014] According to some embodiments of the present invention, each group of the pressing assemblies includes at least two of the pressing devices, and all of the pressing devices are sequentially spaced apart on the frame along the up-down direction.

[0015] According to some embodiments of the present invention, in each group of the pressing assemblies, all the pressing devices are movably mounted on the frame, and the frame is provided with a second driving mechanism that is transmission-connected to all the pressing devices.

[0016] The second driving mechanism can drive all the pressing devices to rise and fall synchronously relative to the frame, or the second driving mechanism can drive any one of the pressing devices to rise and fall independently relative to the frame.

[0017] According to some embodiments of the present invention, in each group of the pressing assemblies, the second driving mechanism is capable of driving all the pressing devices to rise and fall synchronously relative to the frame.

[0018] The second driving mechanism includes a driving portion and a connecting piece provided between two adjacent pressing devices. The driving portion is provided on the frame and is drivingly connected to the uppermost pressing device in the pressing assembly.

[0019] According to some embodiments of the present invention, the connecting member is a chain, and the chain has at least two connecting parts that can be connected to the pressing device, and all the connecting parts are arranged in sequence along the length direction of the chain.

[0020] According to some embodiments of the present invention, a control system and a detection mechanism are further included. The detection mechanism can detect the position of the clamping device located at the uppermost end and / or the lowermost end of the clamping assembly. The control system is electrically connected to the detection mechanism and the second driving mechanism. The control system can control whether the second driving mechanism works or not based on the information fed back by the detection mechanism.

[0021] Additional aspects and advantages of the present invention will be set forth in part in the description which follows and, in part, will be obvious from the description which follows, or may be learned by practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the following description of the embodiments with reference to the accompanying drawings, in which:

[0023] Figure 1 A schematic diagram of a pressing plate of a pressing device according to an embodiment of the present invention in a first position;

[0024] Figure 2 A schematic diagram of a pressing plate of a pressing device according to an embodiment of the present invention in a second position;

[0025] Figure 3 for Figure 2 A schematic diagram of another perspective of the clamping device is shown;

[0026] Figure 4 Schematic diagram of a tube expander according to an embodiment of the present invention;

[0027] Figure 5 for Figure 4 A schematic diagram of the tube expander from another perspective is shown.

[0028] Reference numerals:

[0029] Mounting base 100, first connecting rod 110, first extension rod 111, second connecting rod 120, second extension rod 121, third connecting rod 130, fourth connecting rod 140, pressing plate 150, first driving mechanism 160, output end 161, first buffer block 170;

[0030] The frame 200 , the driving unit 210 , the screw rod 220 , the nut 230 , the chain 240 , the first limit block 250 , the second limit block 251 , the first proximity switch 260 , the second proximity switch 261 , the slide rail 270 , the slider 271 , and the second buffer block 280 . DETAILED DESCRIPTION

[0031] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0032] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention.

[0033] In the description of the present invention, "several" means one or more, "many" means more than two, "greater than," "less than," and "exceed" are understood to exclude the number itself, while "above," "below," and "within" are understood to include the number itself. The use of "first" and "second" in the description is solely for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, implicitly specifying the number of the indicated technical features, or implicitly specifying the order of the indicated technical features.

[0034] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, and connecting should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0035] Reference Figures 1 to 3The present invention proposes a clamping device, which includes a mounting base 100, a pressure plate 150, a connecting rod assembly and a first driving mechanism 160. The pressure plate 150 has a first position close to the mounting base 100 and a second position away from the mounting base 100. The connecting rod assembly includes a first connecting rod 110, a second connecting rod 120, a third connecting rod 130 and a fourth connecting rod 140. The first connecting rod 110 and the third connecting rod 130 are arranged side by side and are rotatably connected to the mounting base 100. One end of the second connecting rod 120 is rotatably connected to the free end of the first connecting rod 110, and the other end of the second connecting rod 120 is rotatably connected to the free end of the third connecting rod 130. Among them, the free end of the first connecting rod 110 specifically refers to the end of the first connecting rod 110 away from the mounting base 100, and the free end of the third connecting rod 130 specifically refers to the end of the third connecting rod 130 away from the mounting base 100. The first connecting rod 110 has a first extension rod 111 at one end away from the mounting base 100. The free end of the first extension rod 111 is rotatably connected to the fourth connecting rod 140, and the other end of the fourth connecting rod 140 is rotatably connected to the pressure plate 150. The free end of the first extension rod 111 specifically refers to the end of the first extension rod 111 away from the first connecting rod 110. The second connecting rod 120 has a second extension rod 121 at one end away from the third connecting rod 130. The free end of the second extension rod 121 is rotatably connected to the pressure plate 150, and the free end of the second extension rod 121 specifically refers to the end of the second extension rod 121 away from the second connecting rod 120. The fourth connecting rod 140 and the second extension rod 121 are arranged side by side. A first driving mechanism 160 is provided on the first connecting rod 110. The output end 161 of the first driving mechanism 160 is rotatably connected to the fourth connecting rod 140. The first driving mechanism 160 is capable of driving the pressure plate 150 to move between a first position and a second position.

[0036] In the above structure, a connecting rod assembly is provided, comprising a first connecting rod 110, a second connecting rod 120, a third connecting rod 130, and a fourth connecting rod 140. The first connecting rod 110 has a first extension rod 111, and the second connecting rod 120 has a second extension rod 121. A four-bar linkage is formed between the first connecting rod 110, the second connecting rod 120, the third connecting rod 130, and the mounting base 100, while a four-bar linkage is formed between the first extension rod 111, the second connecting rod 120, the fourth connecting rod 140, and the pressing plate 150. A first driving mechanism 160 is provided on the first connecting rod 110, and an output end 161 of the first driving mechanism 160 is rotatably connected to the fourth connecting rod 140. During operation, the first driving mechanism 160 can drive the pressing plate 150 to move between a first position and a second position. When the pressing plate 150 is in the first position, the pressing plate 150 and the fourth connecting rod 140 are close together, facilitating the placement or removal of the fins. When the pressing plate 150 is in the second position, the pressing plate 150 can press against the fins and press the fins on the work station. At this time, the fourth connecting rod 140 and the second extension rod 121 can press against the pressing plate 150, so that the pressing device can better press the fins, which is convenient for the processing of the fins.

[0037] It is understood that the first connecting rod 110 and the third connecting rod 130 are arranged side by side and are rotatably connected to the mounting base 100. Specifically, the end of the first connecting rod 110 rotatably connected to the mounting base 100 and the end of the third connecting rod 130 rotatably connected to the mounting base 100 are staggered and spaced apart from each other. The fourth connecting rod 140 is arranged side by side with the second extension rod 121.

[0038] It is understandable that the fourth connecting rod 140 is arranged side by side with the second extension rod 121. Specifically, one end of the fourth connecting rod 140 rotatably connected to the pressing plate 150 and one end of the second extension rod 121 rotatably connected to the pressing plate 150 are staggered and spaced apart from each other.

[0039] It is understandable that the first driving mechanism 160 is provided on the first connecting rod 110, and the output end 161 of the first driving mechanism 160 is rotatably connected to the fourth connecting rod 140. Figures 1 to 3An exemplary illustration of . In addition to being provided on the first connecting rod 110, the first driving mechanism 160 can also be provided on the third connecting rod 130. In addition to being rotatably connected to the fourth connecting rod 140, the output end 161 of the first driving mechanism 160 can also be rotatably connected to the second extension rod 121, and the present invention does not make specific limitations on this. That is, in the clamping device, the first driving mechanism 160 can be provided on the first connecting rod 110, and the output end 161 of the first driving mechanism 160 can be rotatably connected to the fourth connecting rod 140; the first driving mechanism 160 can also be provided on the first connecting rod 110, and the output end 161 of the first driving mechanism 160 can be rotatably connected to the second extension rod 121; the first driving mechanism 160 can also be provided on the third connecting rod 130, and the output end 161 of the first driving mechanism 160 can be rotatably connected to the fourth connecting rod 140; or the first driving mechanism 160 can also be provided on the third connecting rod 130, and the output end 161 of the first driving mechanism 160 can be rotatably connected to the second extension rod 121.

[0040] It is understandable that the first driving mechanism 160 may specifically be a cylinder. In addition, the first driving mechanism 160 may also be a hydraulic cylinder, an electric push rod, or other types of driving mechanisms, which are not specifically limited in the present invention.

[0041] It is understandable that the first driving mechanism 160 can be rotatably disposed on the first connecting rod 110 , thereby enabling the movement of the connecting rod assembly to be more flexible, thereby enabling the movement of the pressure plate 150 to be more flexible.

[0042] Reference Figures 1 to 3 In some embodiments, there are two groups of connecting rod assemblies, and the two groups of connecting rod assemblies are arranged side by side and spaced apart between the mounting base 100 and the pressure plate 150.

[0043] In the above structure, by setting two sets of connecting rod assemblies, the connection between the pressure plate 150 and the mounting seat 100 can be strengthened, making the connection between the pressure plate 150 and the mounting seat 100 more secure, and at the same time making the movement of the pressure plate 150 between the first position and the second position smoother.

[0044] It can be understood that, in the two groups of connecting rod assemblies, the two connecting rods rotatably connected in one group of connecting rod assemblies can be rotatably connected to the corresponding two connecting rods rotatably connected in the other group of connecting rod assemblies through the same pin shaft. For example, the first connecting rod 110 and the second connecting rod 120 in the two groups of connecting rod assemblies are rotatably connected through the same pin shaft, thereby ensuring the consistency of the movement of the two groups of connecting rod assemblies and ensuring that the two groups of connecting rod assemblies can move synchronously.

[0045] Reference Figures 1 to 3In some embodiments, the first driving mechanism 160 is located between the two groups of connecting rod assemblies, and the first driving mechanism 160 can drive the two groups of connecting rod assemblies to move synchronously.

[0046] In the above structure, the two groups of connecting rod assemblies are driven to move synchronously by a first driving mechanism 160, which can make the structure of the clamping device simpler and make the assembly of the clamping device simpler and more convenient.

[0047] It is understandable that, referring to Figures 1 to 3 The first drive mechanism 160 is located between the two connecting rod assemblies. The first drive mechanism 160 is provided on the first connecting rod 110, and the output end 161 of the first drive mechanism 160 is rotatably connected to the fourth connecting rod 140. Specifically, a mounting bracket is provided between the first connecting rods 110 of the two connecting rod assemblies. The first drive mechanism 160 is mounted on the mounting bracket and located between the two first connecting rods 110. A rotating shaft is provided between the fourth connecting rods 140 of the two connecting rod assemblies. The output end 161 of the first drive mechanism 160 is sleeved on the outer circumference of the rotating shaft and is rotatable relative to the rotating shaft.

[0048] It is understood that, in addition to being able to drive the two connecting rod assemblies to move synchronously via a single first drive mechanism 160, each connecting rod assembly may also be provided with a first drive mechanism 160, which is not specifically limited in the present invention. Using two first drive mechanisms 160 to drive the two connecting rod assemblies to move synchronously can provide greater power to the connecting rod assemblies, thereby enabling the pressing device to better press against the fins, further facilitating fin processing.

[0049] Reference Figures 1 to 3 In some embodiments, the fourth connecting rod 140 is provided with a first buffer block 170 capable of abutting against the pressure plate 150 .

[0050] In the above structure, when the pressure plate 150 is in the first position close to the mounting seat 100, the pressure plate 150 and the fourth connecting rod 140 are close to each other. The setting of the first buffer member can prevent the pressure plate 150 from directly colliding with the fourth connecting rod 140 and causing damage to the pressure plate 150 or the fourth connecting rod 140.

[0051] It is understandable that the first buffer block 170 may be a rubber component, a silicone component, or other flexible components, which is not specifically limited in the present invention.

[0052] Reference Figure 4 and Figure 5 The present invention also provides a tube expander, which includes a frame 200 and at least one set of clamping components, each set of clamping components includes at least one clamping device of the above embodiment, and the mounting base 100 of each clamping device is installed on the frame 200.

[0053] In the above structure, by providing at least one set of clamping assemblies, each set of clamping assemblies includes at least one clamping device of the above embodiment. In the clamping device, the first drive mechanism 160 can drive the pressing plate 150 to move between a first position and a second position. When the pressing plate 150 is in the first position, the pressing plate 150 is close to the fourth connecting rod 140, which facilitates the placement or removal of the fins. When the pressing plate 150 is in the second position, the pressing plate 150 can press the fins on the work station. At this time, the fourth connecting rod 140 and the second extension rod 121 can abut against the pressing plate 150, so that the clamping device can better compress the fins, facilitate the processing of the fins, and thus improve the working efficiency of the tube expander.

[0054] It is understandable that, referring to Figure 4 and Figure 5 In some embodiments, there are two sets of compression assemblies, which are arranged opposite each other and correspond one to one on either side of the frame 200. When the pressure plates 150 of the two sets of compression assemblies are in the second position, the pressure plates 150 of the two sets of compression assemblies can jointly press against the fins, thereby pressing the fins against the workstation. This can increase the compression area of ​​the tube expander on the fins, more firmly compress the fins, and thus facilitate fin processing and improve the operating efficiency of the tube expander. Of course, the number of compression assemblies can be one, three, or more than two, and this is not specifically limited by the present invention.

[0055] It is understandable that, referring to Figure 4 and Figure 5 Each clamping assembly includes five clamping devices. When the pressure plates 150 of the five clamping devices are all in the second position, the pressure plates 150 of the five clamping devices can work together to press the fins against the workstation. This can increase the clamping area of ​​the tube expander on the fins, more firmly compressing the fins, thereby facilitating fin processing and improving the operating efficiency of the tube expander. Of course, the number of clamping devices in each clamping assembly can be one, two, three, or more, in addition to five, and the present invention is not specifically limited to this.

[0056] Reference Figure 4 and Figure 5 In some embodiments, each group of clamping assemblies includes five clamping devices, and all the clamping devices are arranged in sequence and spaced apart in the up and down directions.

[0057] In the above structure, each set of clamping assemblies includes five clamping devices. When the pressure plates 150 of the five clamping devices are all in the second position, the pressure plates 150 of the five clamping devices can jointly press against the fins, thereby pressing the fins against the workstation. This can increase the pressing area of ​​the tube expander on the fins, more firmly pressing the fins, thereby facilitating the processing of the fins and improving the working efficiency of the tube expander. Of course, the number of clamping devices in each set of clamping assemblies can be five, two, three, or more, and this is not specifically limited by the present invention. It is only necessary to ensure that when the number of clamping devices in each set of clamping assemblies is at least two, all the clamping devices are arranged in a sequentially spaced manner along the vertical direction.

[0058] Reference Figures 1 to 5 In some embodiments, in each set of clamping assemblies, all the clamping devices are movably mounted on the frame 200, and the frame 200 is provided with a second driving mechanism that is transmission-connected to all the clamping devices, and the second driving mechanism can drive all the clamping devices to rise and fall synchronously relative to the frame 200.

[0059] In the above structure, in each group of clamping assemblies, the second drive mechanism is connected to all the clamping devices in a transmission manner and can drive all the clamping devices to rise and fall synchronously relative to the frame 200. Therefore, the second drive mechanism only needs to include one set of drive parts to drive all the clamping devices to rise and fall synchronously relative to the frame 200, which can make the structure of the tube expander simpler and thus make the assembly of the tube expander simpler and more convenient.

[0060] It is understood that the ability of the second drive mechanism to drive all the clamping devices to synchronously rise and fall relative to the frame 200 is merely an exemplary illustration of the present invention. Furthermore, the second drive mechanism may also be configured to drive any one of the clamping devices to rise and fall independently relative to the frame 200. When the second drive mechanism is capable of driving any one of the clamping devices to rise and fall independently relative to the frame 200, the second drive mechanism may include a drive member that is in one-to-one transmission connection with each of the clamping devices, each drive member being capable of driving a corresponding clamping device to rise and fall relative to the frame 200, thereby enabling each clamping device to rise and fall independently relative to the frame 200.

[0061] It is understandable that, referring to Figures 1 to 5 In some embodiments, in order for each clamping device to be able to rise or fall more smoothly relative to the frame 200, a slide rail 270 arranged in the up and down direction can be set on the frame 200, and the mounting seat 100 of each clamping device is connected to a slide seat that can be movably mounted on the slide rail 270, so that each clamping device can move up and down along the slide rail 270, thereby making the lifting and lowering of each clamping device more stable.

[0062] It is understandable that, referring to Figures 1 to 5To prevent collisions between the various pressing devices in the pressing assembly during ascent or descent relative to the frame 200, a second buffer block 280 may be provided between two adjacent pressing devices. Specifically, one of the two adjacent pressing devices may be provided with the second buffer block 280, or both of the two adjacent pressing devices may be provided with the second buffer block 280, which is not specifically limited in the present invention. The second buffer block 280 may be a flexible member such as a rubber member or a silicone member.

[0063] Reference Figures 1 to 5 In some embodiments, in each group of compression assemblies, the second drive mechanism can drive all compression assemblies to rise and fall synchronously relative to the frame 200. The second drive mechanism includes a drive unit 210 and a connector disposed between two adjacent compression devices. The drive unit 210 is disposed on the frame 200 and is in driving connection with the topmost compression device in the compression assembly.

[0064] In the above structure, the second driving mechanism includes a driving unit 210 and a connecting piece arranged between two adjacent clamping devices. The connecting piece can connect the two adjacent clamping devices together, and the driving unit 210 is transmission-connected to the clamping device located at the top in the clamping assembly. Thus, the driving unit 210 can drive the clamping device located at the top in the clamping assembly to rise or fall relative to the frame 200, and drive the other clamping devices to rise or fall. When the driving unit 210 drives the clamping device located at the top in the clamping assembly to rise relative to the frame 200, the clamping device at the top can pull the other clamping devices to rise relative to the frame 200 through the connecting piece; when the driving unit 210 drives the clamping device located at the top in the clamping assembly to fall relative to the frame 200, the other clamping devices can fall relative to the frame 200 under the action of their own weight.

[0065] It is understandable that the second driving mechanism includes a driving portion 210, which is arranged on the frame 200 and is transmission-connected with the clamping device at the top in the clamping assembly. Wherein, the driving portion 210 can specifically be a cylinder, a hydraulic cylinder or an electric push rod. In addition, the driving portion 210 can also include a motor and a screw pair, the motor is arranged on the frame 200, the screw pair includes a screw rod 220 and a nut 230 used in conjunction with each other, the screw rod 220 is movably mounted on the frame 200 and is transmission-connected with the motor, the nut 230 is installed on the mounting base 100 of the clamping device at the top in the clamping assembly and is threadedly connected with the screw rod 220, the motor drives the screw rod 220 to rotate forward or reverse and drives the nut 230 to rise or fall along the screw rod 220, and then drives the clamping device at the top to rise or fall along the screw rod 220, and the clamping device at the top drives other clamping devices to rise or fall relative to the frame 200 along the screw rod 220 through the connecting piece.

[0066] Reference Figures 1 to 5In some embodiments, in each group of compression assemblies, the second drive mechanism can drive all compression assemblies to rise and fall synchronously relative to the frame 200. The second drive mechanism includes a drive unit 210 and a connector disposed between two adjacent compression devices. The connector is specifically a chain 240. The chain 240 has at least two connectors that can be connected to the compression devices. All connectors are arranged sequentially along the length of the chain 240.

[0067] In the above structure, when the chain 240 has two connecting parts, the two connecting parts are connected to two adjacent pressing devices in a one-to-one correspondence. When the chain 240 has three or more connecting parts, two connecting parts with appropriate spacing can be selected based on the size of the fins or other needs, and the two connecting parts can be connected to two adjacent pressing devices in a one-to-one correspondence, thereby adjusting the spacing between the two adjacent pressing devices.

[0068] It is understandable that the chain 240 has at least two connecting parts that can be connected to the clamping device. Specifically, the connecting parts and the clamping device can be connected by bolts, a clamping structure or other structures, which is not specifically limited in the present invention.

[0069] It can be understood that the chain 240 has at least two connecting parts, wherein the connecting parts can specifically be the links that make up the chain 240 .

[0070] It is understandable that in each set of clamping assemblies, all chains 240 can be an integrated structure, that is, all the clamping devices in the set of clamping assemblies are connected together by a chain 240, thereby making the structure of the tube expander simpler and more convenient to assemble.

[0071] It is understandable that the connecting member provided between two adjacent clamping devices may be a chain 240 or a connecting plate or other structure. When the connecting member is a connecting plate, at least two connection positions for connecting to the clamping device may be provided on the connecting plate. Specifically, the connection positions and the clamping device may be connected by bolts, a clamping structure or other structures, which is not specifically limited by the present invention. When the connecting plate has two connection positions, the two connection positions are connected to the two adjacent clamping devices in a one-to-one correspondence; when the connecting plate has more than three connection positions, two connection positions with appropriate spacing may be selected according to the size of the fins or other needs to be connected to the two adjacent clamping devices in a one-to-one correspondence, thereby adjusting the spacing between the two adjacent clamping devices. In each group of clamping assemblies, all the connecting plates may also be provided as an integrated structure, that is, all the clamping devices of the group of clamping assemblies are connected together by a connecting plate, thereby making the structure of the tube expander simpler and the assembly more convenient.

[0072] In some embodiments, within each set of clamping assemblies, the second drive mechanism can drive all of the clamping assemblies to rise and fall synchronously relative to the frame 200. The tube expander further includes a control system and a detection mechanism. The detection mechanism can detect the position of the uppermost clamping device. The control system is electrically connected to the detection mechanism and the second drive mechanism. The control system can control whether the second drive mechanism operates based on information fed back by the detection mechanism.

[0073] In the above structure, the detection mechanism can detect the position of the uppermost clamping device, and the control system can analyze and judge based on the information fed back by the detection mechanism. If it is determined that the uppermost clamping device has not moved to the set position, the control system controls the second drive mechanism to continue working. If it is determined that the uppermost clamping device has moved to the set position, the control system controls the second drive mechanism to stop working. In this way, the stroke of the clamping devices in the clamping assembly can be accurately controlled, so that each clamping device moves to the set position, avoiding the uppermost clamping device from constantly rising relative to the frame 200 and being unable to act on the fins, resulting in loose fin clamping and affecting fin processing.

[0074] It is understandable that, in addition to being used to detect the position of the clamping device at the top of the clamping assembly, the detection mechanism can also be used to detect the position of the clamping device at the bottom of the clamping assembly. When the detection mechanism is able to detect the position of the clamping device at the bottom of the clamping assembly, the control system can analyze and judge based on the information fed back by the detection mechanism. If it is determined that the clamping device at the bottom has not yet moved to the set position, the control system controls the second drive mechanism to continue working. If it is determined that the clamping device at the bottom has moved to the set position, the control system controls the second drive mechanism to stop working. Thus, the stroke of the clamping device in the clamping assembly can be accurately controlled so that each clamping device moves to the set position, thereby preventing the clamping device at the bottom from constantly descending relative to the frame 200 and being unable to act on the fins, resulting in the fins being loosely compressed, affecting the processing of the fins.

[0075] It can be understood that in addition to being used to detect the position of the clamping device at the uppermost or lowermost end of the clamping assembly, the detection mechanism can also be used to simultaneously detect the positions of the clamping devices at the uppermost and lowermost ends of the clamping assembly, thereby being able to more accurately control the stroke of the clamping device in the clamping assembly.

[0076] It is understood that the detection mechanism may specifically include a proximity switch. Figure 5In some embodiments, the frame 200 is provided with a first proximity switch 260 and a second proximity switch 261 located below the first proximity switch 260. Both the first proximity switch 260 and the second proximity switch 261 are electrically connected to a control system, and the clamping assembly is located between the first proximity switch 260 and the second proximity switch 261. The first proximity switch 260 can detect the distance between the uppermost clamping device in the clamping assembly and itself and transmit the detection result to the control system. The control system can analyze and determine based on the information fed back by the first proximity switch 260. If it is determined that the distance between the uppermost clamping device in the clamping assembly and the first proximity switch 260 has reached a set distance, the second drive mechanism can be controlled to stop operating. The second proximity switch 261 can detect the distance between the lowermost clamping device in the clamping assembly and itself and transmit the detection result to the control system. The control system can analyze and determine based on the information fed back by the second proximity switch 261. If it is determined that the distance between the lowermost clamping device in the clamping assembly and the second proximity switch 261 has reached a set distance, the second drive mechanism can be controlled to stop operating. In this way, the clamping assembly can be controlled between the first proximity switch 260 and the second proximity switch 261.

[0077] It is understandable that, referring to Figure 5 In some embodiments, the rack 200 is provided with two first proximity switches 260 . The two first proximity switches 260 can serve as backup for each other or can be used together to reduce detection errors and increase detection accuracy of the detection mechanism.

[0078] It is understandable that the detection mechanism may include not only a proximity switch but also a distance sensor, such as an ultrasonic distance sensor, an infrared distance sensor, a laser distance sensor, etc. In addition, the detection mechanism may also include a limit block and a current detection device.

[0079] Reference Figure 4In some embodiments, the frame 200 is provided with a first limit block 250 and a second limit block 251 located below the first limit block 250, and the clamping assembly is located between the first limit block 250 and the second limit block 251. The second driving mechanism includes a driving part 210 and a connecting piece provided between two adjacent clamping devices. The driving part 210 includes a motor and a screw pair, the motor is provided on the frame 200, the screw pair includes a screw 220 and a nut 230 used in conjunction with each other, the nut 230 is installed on the mounting base 100 of the clamping device located at the top of the clamping assembly and is threadedly connected to the screw 220. The screw 220 is driven by the motor to rotate, thereby driving the clamping device of the clamping assembly to rise or fall along the screw 220 relative to the frame 200. In this structure, the current detection device is electrically connected to the control mechanism. The current detection device can detect the current change when the motor is energized. The control system analyzes and judges based on the information fed back by the current detection device. If the current value of the motor increases and exceeds the set value, the control system judges that the uppermost clamping device in the clamping assembly abuts against the first limit block 250, or the lowermost clamping device in the clamping assembly abuts against the second limit block 251, and controls the motor to stop rotating, thereby controlling the clamping assembly between the first limit block 250 and the second limit block 251.

[0080] It is understandable that the above-mentioned current detection device can be a Hall current sensor, a current transformer, a current detection circuit or other structures. The present invention does not specifically limit the specific type of the current detection device.

[0081] The embodiments of the present invention are described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Various changes can be made within the knowledge of ordinary technicians in the relevant technical field without departing from the scope of the present invention.

Claims

1. Tube expander, characterized in that: include: rack(200); A compression assembly, each group of the compression assembly includes at least two compression devices; The pressing device comprises: A mounting base (100) is mounted on the frame (200); a pressing plate (150), the pressing plate (150) having a first position close to the mounting seat (100) and a second position away from the mounting seat (100); A connecting rod assembly comprises a first connecting rod (110), a second connecting rod (120), a third connecting rod (130) and a fourth connecting rod (140), wherein the first connecting rod (110) and the third connecting rod (130) are arranged side by side and are rotatably connected to the mounting seat (100), one end of the second connecting rod (120) is rotatably connected to the free end of the first connecting rod (110), and the other end of the second connecting rod (120) is rotatably connected to the free end of the third connecting rod (130), and the first connecting rod (110) is away from the mounting seat (1 00) has a first extension rod (111) at one end, a free end of the first extension rod (111) is rotatably connected to the fourth connecting rod (140), the other end of the fourth connecting rod (140) is rotatably connected to the pressure plate (150), the second connecting rod (120) has a second extension rod (121) at one end away from the third connecting rod (130), the free end of the second extension rod (121) is rotatably connected to the pressure plate (150), and the fourth connecting rod (140) and the second extension rod (121) are arranged side by side; a first driving mechanism (160), wherein the first driving mechanism (160) is capable of driving the pressing plate (150) to move between a first position and a second position; There are two groups of connecting rod assemblies, and the two groups of connecting rod assemblies are arranged side by side and spaced apart between the mounting seat (100) and the pressure plate (150); A mounting frame is provided between the first connecting rods (110) of the two groups of connecting rod assemblies, the first driving mechanism (160) is installed on the mounting frame and is located between the two first connecting rods (110), a rotating shaft is provided between the fourth connecting rods (140) of the two groups of connecting rod assemblies, and the output end (161) of the first driving mechanism (160) is sleeved on the outer periphery of the rotating shaft and can rotate relative to the rotating shaft; All the pressing devices are sequentially arranged on the frame (200) at intervals along the vertical direction; In each group of the pressing assemblies, all the pressing devices are movably mounted on the frame (200), and the frame (200) is provided with a second driving mechanism that is transmission-connected to all the pressing devices. The second driving mechanism is capable of driving all the pressing devices to rise and fall synchronously relative to the frame (200); The second driving mechanism comprises a driving portion (210) and a connecting member provided between two adjacent pressing devices, the driving portion (210) being provided on the frame (200) and being transmission-connected to the uppermost pressing device in the pressing assembly; The connecting member is a chain (240), and the chain (240) has at least two connecting parts that can be connected to the pressing device, and all the connecting parts are arranged in sequence along the length direction of the chain (240), wherein the connecting parts are the individual chain links that constitute the chain (240).

2. The tube expander according to claim 1, characterized in that It also includes a control system and a detection mechanism, wherein the detection mechanism can detect the position of the clamping device located at the uppermost and / or lowermost end of the clamping assembly, and the control system is electrically connected to the detection mechanism and the second driving mechanism. The control system can control whether the second driving mechanism works or not based on the information fed back by the detection mechanism.

3. The tube expander according to claim 1, characterized in that The fourth connecting rod (140) is provided with a first buffer block (170) capable of abutting against the pressure plate (150).

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