A steel needle assembly for grasping heat dissipation fins

Abstract

The present invention discloses a steel needle assembly for grasping heat dissipation fins, which includes an outer tube that can pass through the through holes on the heat dissipation fins. A swelling and shrinking head that can pass through the through holes on the heat dissipation fins is provided at the lower end of the outer tube. A core rod that can move up and down is arranged inside the outer tube. A squeezing head is provided at the lower end of the core rod. When the core rod moves upward or downward, the squeezing head compresses the swelling and shrinking head to expand, so as to limit the swelling and shrinking head from passing through the through holes on the heat dissipation fins. This steel needle assembly is convenient for automatically grasping and automatically unloading the heat fins, which is beneficial to realizing the automatic handling of the heat dissipation fins.

Description

Technical Field

[0001] The present invention relates to the technical field of the production of heat exchangers, and in particular to a steel needle assembly for grasping heat dissipation fins. Background Art

[0002] A heat exchanger is an important component of an air conditioner, which generally includes heat exchange pipes and fins arranged on the heat exchange pipes. The heat dissipation fins are metal sheets, and are covered with through holes for the heat exchange pipes to pass through.

[0003] At present, the production process of the heat exchanger, an internal component of a traditional air conditioner, is as follows: The fins formed by punching on a punching press are collected in a fixed rack, and the fins are sorted on the rack and positioning rods (rigid guide rods, such as auxiliary steel needles, etc.) are inserted manually. Then, the whole stack is picked up and transported to a storage place by manual handling / truss type pick-up machine, and then the stacked materials are disassembled into single pieces by manual and transported to a tube-piercing machine for tube piercing. The labor intensity of the whole process is large, the work efficiency is low, and the labor cost is high. Moreover, the fins will be damaged in appearance to a certain extent during the manual handling process. Summary of the Invention

[0004] In view of this, the purpose of the present invention is to provide a steel needle assembly that is convenient for automatically grasping and automatically unloading heat fins, which is beneficial to realizing the automatic handling of heat dissipation fins.

[0005] The technical solution adopted by the present invention to solve its technical problems is:

[0006] A steel needle assembly for grasping heat dissipation fins includes an outer tube that can pass through the through holes on the heat dissipation fins. A swaging head that can pass through the through holes on the heat dissipation fins is arranged at the lower end of the outer tube. A core rod that can move up and down is arranged inside the outer tube. A squeezing head is arranged at the lower end of the core rod. When the core rod moves upward or downward, the squeezing head presses against the swaging head to expand it. A step that can support the heat dissipation fins when the swaging head expands is arranged on the swaging head. A first bevel edge that is parallel to the axis of the outer tube when the swaging head expands is also arranged on the swaging head.

[0007] As a further optimized solution of the above technical solution, the lower end part of the swaging head is a conical part that gradually narrows from top to bottom.

[0008] As a further optimized solution of the above technical solution, at least two axial swaging grooves are arranged on the swaging head at intervals. The swaging grooves are semi-through grooves with open lower ends and closed upper ends. The swaging grooves divide several elastic rods on the swaging head. A supporting and pushing inclined surface is arranged on the inner side wall of the elastic rod. When the squeezing head moves upward or downward, it presses against the supporting and pushing inclined surface to make all the elastic rods bend and deform in a direction away from the axis of the outer tube.

[0009] As a further optimized solution of the above technical solution, the first bevel edge and the step are both arranged on the outer side wall of the elastic rod.

[0010] As a further optimized solution of the above technical solution, the step surface of the step intersects with the first bevel edge and the two are perpendicular to each other.

[0011] As a further optimized solution of the above technical solution, all the thrust bearing inclined surfaces together form a tapered surface that gradually narrows from top to bottom. A first tapered portion that gradually tapers from top to bottom is provided at the lower part of the expansion head. When the expansion head moves downward, the first tapered portion presses against the thrust bearing inclined surface of the elastic rod so that all the elastic rods bend and deform in a direction away from the axis of the outer tube.

[0012] As a further optimized solution of the above technical solution, all the thrust bearing inclined surfaces together form a tapered surface that gradually expands from top to bottom. A second tapered portion that gradually thickens from top to bottom is provided at the lower part of the expansion head. When the expansion head moves upward, the second tapered portion presses against the thrust bearing inclined surface of the elastic rod so that all the elastic rods bend and deform in a direction away from the axis of the outer tube.

[0013] As a further optimized solution of the above technical solution, a groove arranged along the circumferential direction is provided on the outer side wall at the upper end of the elastic rod, and the bottom surface of the groove is an arc transition surface.

[0014] The beneficial effects of the present invention are as follows: The heat dissipation fin grasping device applying the steel needle assembly of the present invention can realize automatic handling of heat dissipation fins when used in cooperation with a traveling mechanism that can move in three axes or two axes. Moreover, grasping and unloading the heat dissipation fins are both very convenient and fast, improving work efficiency and reducing production costs. Description of the Drawings

[0015] Figure 1 is a cross-sectional view of Embodiment 1 of the steel needle assembly;

[0016] Figure 2 is a perspective view of the heat dissipation fin grasping device in the use state;

[0017] Figure 3 is a cross-sectional view of the heat dissipation fin grasping device in the use state;

[0018] Figure 4 is the working principle diagram of Embodiment 1 of the steel needle assembly when the expansion and contraction head has not expanded;

[0019] Figure 5 is the working principle diagram of Embodiment 1 of the steel needle assembly when the expansion and contraction head expands;

[0020] Figure 6 is a cross-sectional view of the expansion and contraction head in Embodiment 1 of the steel needle assembly;

[0021] Figure 7 It is a cross-sectional view of the expansion and contraction head in Embodiment 2 of the steel needle assembly;

[0022] Figure 8 It is a cross-sectional view of the lower end of the core rod in Embodiment 2 of the steel needle assembly. Specific Embodiment

[0023] Next, the technical solution of the present invention will be clearly and completely described in conjunction with the accompanying drawings.

[0024] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in the present invention are only used to explain the relative positional relationship and movement conditions between components in a specific posture (as shown in the accompanying drawings). If this specific posture changes, the directional indicators will also change accordingly. In addition, the descriptions involving "preferred", "sub-preferred", etc. in the present invention are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "preferred" and "sub-preferred" may explicitly or implicitly include at least one such feature.

[0025] Referring to Figures 1 to 8 , the present invention provides a heat dissipation fin grasping device, which includes a fixing plate 1 and a plurality of outer tubes 3 that can pass through the through holes on the heat dissipation fins 2. The upper end of the outer tube 3 is fixedly connected to the fixing plate 1, and a contraction and expansion head 4 that can pass through the through holes on the heat dissipation fins 2 is provided at the lower end of the outer tube 3. A core rod 5 is movably arranged in the outer tube 3, and the core rod 5 is connected to a driving device that can drive it to move up and down relative to the outer tube 3. A squeezing head 6 is provided at the lower end of the core rod 5. When the core rod 5 moves up or down, the contraction and expansion head 4 is pushed and expanded by the squeezing head 6 to limit the contraction and expansion head 4 from passing through the through holes on the heat dissipation fins 2.

[0026] The above-mentioned outer tube 3, core rod 5, contraction and expansion head 4, and squeezing head 6 constitute a steel needle assembly for grasping heat dissipation fins.

[0027] The numbers of the outer tube 3, core rod 5, and contraction and expansion head 4 are equal. The number of the outer tubes 3 is generally 1 - 20, and 2, 4, and 6 are the best. The number of the contraction slots 41 is preferably 4 - 6.

[0028] The outer tube 3 and the contraction and expansion head 4 can be an integrally formed structure, or can be separately formed and then fixedly connected together. The core rod 5 and the squeezing head 6 can be an integrally formed structure, or can be separately formed and then fixedly connected together.

[0029] Embodiment 1

[0030] Figures 1 - 5Embodiment 1 of the present invention is shown. In this embodiment, at least two axial expansion and contraction grooves 41 are arranged at intervals on the expansion and contraction head 4. The expansion and contraction grooves 41 are semi-through grooves with open lower ends and closed upper ends. The expansion and contraction grooves 41 divide several elastic rods 42 on the expansion and contraction head 4. A thrust-bearing inclined surface 421 is arranged on the inner side wall of the elastic rod 42. When the expansion head 6 moves downward, it presses against the thrust-bearing inclined surface 421 to cause all the elastic rods 42 to bend and deform in a direction away from the axis of the outer tube 3.

[0031] Specifically, all the thrust-bearing inclined surfaces 421 together form a conical surface that gradually narrows from top to bottom. The lower part of the expansion head 6 is provided with a first conical part 61 that gradually tapers from top to bottom. When the expansion head 6 moves downward, the first conical part 61 presses against the thrust-bearing inclined surface 421 of the elastic rod 42 to cause all the elastic rods 42 to bend and deform in a direction away from the axis of the outer tube 3.

[0032] The working principle of this embodiment is as follows: During the production process, the fixing plate 1 can be installed on a walking mechanism or a manipulator that can move in three axes. After multiple heat dissipation fins 2 are stacked together and aligned, the fixing plate 1 moves to a predetermined position, so that the lower end of the expansion and contraction head 4 is aligned with the corresponding through hole. Then the fixing plate 1 moves downward, so that the expansion and contraction head 4 passes through all the fins and extends out from the lower surface of the lowermost fin. Then the driving device drives the core rod 5 to move downward, and presses against the elastic rod 42 through the first conical part 61 to cause all the elastic rods 42 to bend and deform in a direction away from the axis of the outer tube 3, so that the expansion and contraction head 4 switches to the expanded state. At this time, the automatic grasping of the heat dissipation fins 2 is completed, preventing the fins from falling under the action of gravity; then the walking mechanism or the manipulator drives the fixing plate 1 to move, moves the heat dissipation fins 2 to the target position, then the driving device drives the core rod 5 to reset upward, the expansion and contraction head 4 returns to the initial state under the action of elastic force, and finally the fixing plate 1 moves upward to pull out all the expansion and contraction heads 4 and the outer tube 3 upward, and the heat dissipation fins 2 can be removed. Compared with the prior art, when this embodiment is used in cooperation with a walking mechanism that can move in three axes or two axes, it can realize the automatic handling of the heat dissipation fins 2, and both grasping and removing the heat dissipation fins 2 are very convenient and fast, improving work efficiency and reducing production costs.

[0033] Furthermore, a step 422 capable of supporting the heat dissipation fin 2 when the expansion and contraction head 4 expands is arranged on the outer side wall of the elastic rod 42. Refer to Figure 4 , when the expansion and contraction head 4 expands, the heat dissipation fin 2 can be hooked by the above-mentioned step 422, which can play a better role in preventing the fin from falling downward during the process of moving the heat dissipation fin 2.

[0034] On the outer side wall of the elastic rod 42, there is a first bevel edge 405 that can be parallel to the axis of the outer tube 3 when the expansion head 4 expands. The step surface of the step 422 intersects with the first bevel edge 405 and the two are perpendicular. With such a design, when the expansion head 4 expands, the first bevel edge 405 is in a vertical state and just adheres to the hole wall of the heat dissipation fin 2, without damaging the heat dissipation fin. At this time, the step surface (i.e., the grasping edge) of the step 422 is just in a horizontal state, which can just hold the entire group of heat dissipation fins 2 and is not likely to damage the lower surface of the fins.

[0035] In this embodiment, a connecting plate 7 is arranged above the fixing plate 1. The upper ends of all the core rods 5 are fixedly connected to the connecting plate 7, and the driving device is connected to the connecting plate 7 to drive all the core rods 5 to move up and down together. The driving device can adopt a combination of a cylinder 8, a hydraulic cylinder, an electric push rod or a motor and a screw-nut pair.

[0036] Furthermore, a groove 401 arranged along the circumferential direction is provided on the outer side wall of the upper end of the elastic rod 42, and the bottom surface of the groove 401 is an arc transition surface. With such a design, the elastic rod 42 can have good elasticity.

[0037] In order to facilitate the expansion head 4 to pass downward through the heat dissipation fins 2, the lower end of the expansion head 4 is a tapered portion 402 that gradually narrows from top to bottom.

[0038] Embodiment 2

[0039] Figures 6 to 8 Embodiment 2 of the present invention is shown. This embodiment has a similar structure to Embodiment 1, and the differences are as follows.

[0040] First, in this embodiment, the bearing inclined surface 421 is arranged at the lower end of the inner side of the elastic rod 42. All the bearing inclined surfaces 421 together form a tapered surface that gradually expands from top to bottom. The lower part of the expansion head 6 is provided with a second tapered portion 62 that gradually becomes thicker from top to bottom. When the expansion head 6 moves upward, the second tapered portion 62 presses against the bearing inclined surface 421 of the elastic rod 42 so that all the elastic rods 42 bend and deform in a direction away from the axis of the outer tube 3.

[0041] Second, the lower end of the expansion head 4 in this embodiment does not have a structure similar to the tapered portion 402 in Embodiment 1.

[0042] The above is only the preferred embodiment of the present invention, and it does not limit the patent scope of the present invention accordingly. Any equivalent structural transformation made under the inventive concept of the present invention by using the content of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, is included in the patent protection scope of the present invention.

Claims

1. A steel needle assembly for grasping heat dissipation fins, characterized in that, It includes an outer tube (3) that can pass through the through holes on the heat dissipation fins (2). A swelling head (4) that can pass through the through holes on the heat dissipation fins (2) is provided at the lower end of the outer tube (3). A core rod (5) that can move up and down is arranged inside the outer tube (3). An extrusion head (6) is provided at the lower end of the core rod (5). When the core rod (5) moves upward or downward, the extrusion head (6) presses against the swelling head (4) to expand it. A step (422) that can support the heat dissipation fins (2) when it expands is provided on the swelling head (4). A first bevel edge (405) that is parallel to the axis of the outer tube (3) when it expands is also provided on the swelling head (4). At least two axial swelling grooves (41) are arranged at intervals on the swelling head (4). The swelling grooves (41) are semi-through grooves with open lower ends and closed upper ends. The swelling grooves (41) divide the swelling head (4) into several elastic rods (42). A pushing slope (421) is provided on the inner side wall of the elastic rod (42). When the extrusion head (6) moves upward or downward, it presses against the pushing slope (421) to make all the elastic rods (42) bend and deform in a direction away from the axis of the outer tube (3). The step surface of the step (422) intersects with the first bevel edge (405) and they are perpendicular to each other. A groove (401) arranged along the circumferential direction is provided on the outer side wall of the upper end of the elastic rod (42). The bottom surface of the groove (401) is an arc transition surface.

2. The steel needle assembly for grasping heat dissipation fins according to claim 1, wherein, The lower end part of the swelling head (4) is a conical part (402) that gradually narrows from top to bottom.

3. The steel needle assembly for grasping heat dissipation fins according to claim 1, characterized in that, Both the first bevel edge (405) and the step (422) are provided on the outer side wall of the elastic rod (42).

4. A steel needle assembly for grasping heat dissipation fins according to claim 1, characterized in that, All the pushing slopes (421) together form a conical surface that gradually narrows from top to bottom. A first conical part (61) that gradually tapers from top to bottom is provided at the lower part of the extrusion head (6). When the extrusion head (6) moves downward, the first conical part (61) presses against the pushing slopes (421) of the elastic rods (42) to make all the elastic rods (42) bend and deform in a direction away from the axis of the outer tube (3).

5. A steel needle assembly for grasping heat dissipation fins according to claim 1, characterized in that, All the pushing slopes (421) together form a conical surface that gradually expands from top to bottom. A second conical part (62) that gradually thickens from top to bottom is provided at the lower part of the extrusion head (6). When the extrusion head (6) moves upward, the second conical part (62) presses against the pushing slopes (421) of the elastic rods (42) to make all the elastic rods (42) bend and deform in a direction away from the axis of the outer tube (3).

Images