Power module electrode bending mechanism

Abstract

The utility model relates to the technical field of electrode bending, and provides a power module electrode bending mechanism which comprises a machine frame, a module, three mechanical arms and a driving mechanism, the module is located on the lower portion in the machine frame and used for electrode positioning, and the three mechanical arms are all located above the module. The driving mechanism is mounted above the rack and connected with the upper ends of the three mechanical arms, and the three mechanical arms are used for bending three electrodes respectively; the automatic bending device has the advantages that the problems that in the prior art, automatic bending equipment is complex in structure, high in manufacturing cost, large in occupied area and low in efficiency are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of electrode bending, in particular to an electrode bending mechanism for a power module. Background Art

[0002] High-power half-bridge IGBT modules usually include three copper electrodes that can pass a large current. Figure 4 Taking the 34mm module shown as an example, the three electrodes are soldered to the module's internal circuitry, passed through corresponding square holes in the module housing, and then bent parallel to the module's top surface. Previously, this electrode was bent manually and then flattened using a press. This method is inefficient, produces poor electrode consistency, and can easily cause muscle strain for operators, forcing us to consider automating this process.

[0003] After investigation, the inventors found that the existing equipment that can realize the automation of this process adopts a step-by-step bending scheme, which bends the three electrodes in three steps, and each step uses a separate motor to drive the bending. Therefore, the equipment has a complex structure, high production cost, large floor space and low work efficiency. Utility Model Content

[0004] In response to the above technical problems existing in the prior art, a power module electrode bending mechanism is provided, which solves the problems of complex structure, high production cost, large footprint and low efficiency of the automated bending equipment in the prior art.

[0005] The purpose and effect of this utility model are achieved by the following specific technical means:

[0006] A power module electrode bending mechanism comprises: a frame, a module, a robotic arm and a drive mechanism, wherein the module is located at the lower interior of the frame and is used to position the electrode, three robotic arms are provided and are all located above the module, the drive mechanism is installed above the frame and connected to the upper ends of the three robotic arms, and the three robotic arms are used to bend three electrodes respectively.

[0007] Furthermore, the driving mechanism includes a first movable plate, a second movable plate, and a cylinder. The cylinder is fixed to the top of the frame, the first movable plate is fixed to the movable end of the cylinder, the second movable plate is located between the first movable plate and the module, and the upper ends of the three robotic arms pass through the second movable plate and are fixedly connected to the first movable plate.

[0008] Furthermore, the robotic arm includes a mounting rod, a first rotating arm, a second rotating arm and a movable block that are hinged in pairs in sequence. The lower end of the first rotating arm, the second rotating arm and the movable block are all located below the second movable plate, and the upper end of the first rotating arm passes through the second movable plate and is fixedly connected to the first movable plate. The movable block is used to bend the electrode.

[0009] Furthermore, the robotic arm also includes a first limiting member and a second limiting member located below the second movable plate, and both ends of the second rotating arm are respectively installed on the first limiting member and the second limiting member.

[0010] Furthermore, the first limiting member includes a pair of first mounting plates, each of which has a first sliding groove on its inner side, one end of the second rotating arm is located between the pair of first mounting plates and is slidably connected to the first sliding groove, and the pair of first mounting plates are fixed together by a connecting member.

[0011] Furthermore, the second limiting member includes a pair of second mounting plates, each of which has a second sliding groove on its inner side. The other end is located between the pair of second mounting plates and is slidably connected to the second sliding groove. The pair of second mounting plates are fixed together by a connecting member.

[0012] Furthermore, the second rotating arm is an arc-shaped plate, and the first sliding groove and the second sliding groove are both arc-shaped and have the same motion trajectory as the second rotating arm.

[0013] Furthermore, at least one pair of guide rods is fixed on the frame, and the first movable plate and the second movable plate penetrate into the pair of guide rods and are slidably connected thereto.

[0014] Furthermore, the module is provided with three square holes for inserting electrodes.

[0015] Furthermore, a limiting groove for embedding the module is opened at the bottom of the rack.

[0016] Compared with the prior art, the beneficial effects of the present invention are:

[0017] This power module electrode bending mechanism has a simple structure. One drive mechanism can drive three robotic arms to move, which not only reduces the size of the equipment, but also enables bending of multiple electrodes on the same workstation (module), greatly improving production efficiency and reducing equipment costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the overall three-dimensional structure of the utility model;

[0019] Figure 2 This is a schematic diagram of the overall main structure of the utility model;

[0020] Figure 3This is a schematic diagram of the overall side structure of the utility model;

[0021] Figure 4 This is a comparison diagram of the electrodes on the module of the present invention before and after bending;

[0022] Figure 5 This is a schematic diagram of the three-dimensional structure of the robotic arm and modules of the present utility model;

[0023] Figure 6 This is an exploded view of the robotic arm of the present utility model;

[0024] Figure 7 It is a schematic diagram of the front side cross-sectional structure of the robot arm bending electrode of the present invention and its simplified diagram;

[0025] Figure 8 This is a schematic diagram of the rear side cross-sectional structure of the robotic arm bending electrode of the present invention and its simplified diagram.

[0026] Markings in the figure: frame 1, guide rod 11, limit slot 12, module 2, square hole 21, robotic arm 3, first mounting plate 31, first slide slot 311, second mounting plate 32, second slide slot 321, mounting rod 33, first rotating arm 34, second rotating arm 35, movable block 36, driving mechanism 4, first movable plate 41, second movable plate 42, cylinder 43. DETAILED DESCRIPTION

[0027] See also Figure 1-8 , further illustrate the embodiments of the present utility model;

[0028] A power module electrode bending mechanism, comprising: a frame 1, a module 2, a mechanical arm 3 and a driving mechanism 4, such as Figure 2 and 3 As shown, the module 2 is located at the bottom of the rack 1. A limiting groove 12 is provided at the bottom of the rack 1 for the module 2 to be embedded. The setting of the limiting groove 12 facilitates the rapid positioning of the module 2 on the rack 1 or the rapid removal from the rack 1. In addition, other limiting structures can also be used. In order to facilitate the transportation of the module 2, a conveyor belt (not shown) for conveying the module 2 can also be provided at the bottom of the rack 1. The conveyor belt also needs to be equipped with a limiting structure for limiting the module 2. Figure 4As shown, the module 2 is provided with three square holes 21 for inserting electrodes, the module 2 is used for electrode positioning, three robotic arms 3 are provided and are all located above the module 2, the driving mechanism 4 is installed above the frame 1 and is connected to the upper ends of the three robotic arms 3, the three robotic arms 3 are used to bend the three electrodes respectively, when the electrodes need to be bent, the three electrodes are respectively inserted into the three square holes 21 on the module 2, and there is enough space under the three robotic arms 3 for the module 2 to be placed in the limiting groove 12. After the module 2 is placed, the three electrodes correspond to the three robotic arms 3 respectively, and the driving mechanism 4 is started to drive the three robotic arms 3 to move together, so that the three electrodes can be bent at the same time. The bending mechanism has a simple structure, and one driving mechanism 4 can drive the three robotic arms 3 to move, which not only reduces the volume of the equipment, but also realizes the bending of three electrodes on the same workstation (module 2), greatly improving production efficiency and reducing equipment costs.

[0029] like Figure 1-3 As shown, the driving mechanism 4 includes a first movable plate 41, a second movable plate 42, and a cylinder 43. The cylinder 43 is fixed to the top of the frame 1, the first movable plate 41 is fixed at the movable end of the cylinder 43, and the second movable plate 42 is located between the first movable plate 41 and the module 2. The upper ends of the three robotic arms 3 pass through the second movable plate 42 and are fixedly connected to the first movable plate 41. The second movable plate 42 limits the lower parts of the three robotic arms 3. The cylinder 43 serves as a power source to push the first movable plate 41, the second movable plate 42 and the three robotic arms 3, thereby realizing the electrode bending operation. It should be noted that the cylinder 43 can also be replaced with a driving component such as a hydraulic cylinder, an electric cylinder, etc., which can realize the operation of the three robotic arms 3.

[0030] like Figure 5 and 6 As shown, the robotic arm 3 includes a mounting rod 33, a first rotating arm 34, a second rotating arm 35 and a movable block 36 which are hinged in pairs in sequence. The lower end of the first rotating arm 34, the second rotating arm 35 and the movable block 36 are all located below the second movable plate 42, and the upper end of the first rotating arm 34 passes through the second movable plate 42 and is fixedly connected to the first movable plate 41. The movable block 36 is used to bend the electrode.

[0031] like Figure 1 、 2 , 3, 5 and 6, the robotic arm 3 further includes a first limiter and a second limiter located below the second movable plate 42, and both ends of the second rotating arm 35 are respectively mounted on the first limiter and the second limiter;

[0032] Among them, the first limiting member includes a pair of first mounting plates 31, each of which has a first sliding groove 311 on the inner side. One end of the second rotating arm 35 is located between the pair of first mounting plates 31 and is slidingly connected to the first sliding groove 311, and the pair of first mounting plates 31 are fixed together by a connecting member.

[0033] In addition, the second limiting member includes a pair of second mounting plates 32, each of which has a second sliding groove 321 on its inner side. The other end is located between the pair of second mounting plates 32 and is slidably connected to the second sliding groove 321. The pair of second mounting plates 32 are fixed together by a connecting member.

[0034] The second rotating arm 35 is an arc-shaped plate, and the first sliding groove 311 and the second sliding groove 321 are both arc-shaped and have the same motion trajectory as the second rotating arm 35 .

[0035] In order to make the longitudinal movement of the first movable plate 41 and the second movable plate 42 more stable, at least a pair of guide rods 11 are fixed on the frame 1 , and the first movable plate 41 and the second movable plate 42 penetrate into the pair of guide rods 11 and are slidably connected thereto.

[0036] When the bending mechanism is in use, the three electrodes are respectively inserted into the three square holes 21 on the module 2, and then the module 2 is placed in the limit slot 12. At this time, the three electrodes correspond to the three robotic arms 3 respectively, and then the driving mechanism 4 is started to drive the three robotic arms 3 to move together. Specifically, when the cylinder 43 works, it pushes the first movable plate 41 downward, and the first movable plate 41 drives the mounting rod 33, the first mounting plate 31, the second mounting plate 32, the first rotating arm 34, the second rotating arm 35, and the movable block 36 to rotate at a certain angle, prompting the movable block 36 to bend the electrode. During this process, the two ends of the movable block 36 slide in the first slide groove 311 and the second slide groove 321 respectively, and the motion trajectory is as shown in FIG. Figure 7 and 8 As shown, the second movable plate 42 restrains the first mounting plate 31, the second mounting plate 32, the second rotating arm 35, and the movable block 36 below it, allowing the movable block 36 to stably bend the electrode. This bending mechanism has a simple structure, and a single drive mechanism 4 can drive the three robotic arms 3. This not only reduces the size of the equipment, but also enables the bending of three electrodes at the same station (module 2), greatly improving production efficiency and reducing equipment costs.

Claims

1. A power module electrode bending mechanism, characterized in that: include: A frame (1), a module (2), a robotic arm (3) and a driving mechanism (4), wherein the module (2) is located at the lower part of the frame (1), the module (2) is used for electrode positioning, three robotic arms (3) are provided and all are located above the module (2), the driving mechanism (4) is installed above the frame (1) and connected to the upper ends of the three robotic arms (3), and the three robotic arms (3) are used for bending three electrodes respectively.

2. The power module electrode bending mechanism according to claim 1, characterized in that: The driving mechanism (4) comprises a first movable plate (41), a second movable plate (42), and a cylinder (43); the cylinder (43) is fixed to the top of the frame (1); the first movable plate (41) is fixed to the movable end of the cylinder (43); the second movable plate (42) is located between the first movable plate (41) and the module (2); and the upper ends of the three mechanical arms (3) pass through the second movable plate (42) and are fixedly connected to the first movable plate (41).

3. The power module electrode bending mechanism according to claim 2, characterized in that: The mechanical arm (3) comprises a mounting rod (33), a first rotating arm (34), a second rotating arm (35) and a movable block (36) which are hinged in pairs in sequence. The lower end of the first rotating arm (34), the second rotating arm (35) and the movable block (36) are all located below the second movable plate (42). The upper end of the first rotating arm (34) passes through the second movable plate (42) and is fixedly connected to the first movable plate (41). The movable block (36) is used for bending the electrode.

4. The power module electrode bending mechanism according to claim 3, characterized in that: The mechanical arm (3) further comprises a first limiting member and a second limiting member located below the second movable plate (42), and two ends of the second rotating arm (35) are respectively mounted on the first limiting member and the second limiting member.

5. The power module electrode bending mechanism according to claim 4, characterized in that: The first limiting member includes a pair of first mounting plates (31), each of the first mounting plates (31) having a first sliding groove (311) formed on its inner side, one end of the second rotating arm (35) being located between the pair of first mounting plates (31) and slidably connected to the first sliding groove (311), and the pair of first mounting plates (31) being fixed together via a connecting member.

6. The power module electrode bending mechanism according to claim 5, characterized in that: The second limiting member includes a pair of second mounting plates (32), each of the second mounting plates (32) having a second sliding groove (321) formed on its inner side, the other end of the second limiting member being located between the pair of second mounting plates (32) and slidably connected to the second sliding groove (321), and the pair of second mounting plates (32) being fixed together by a connecting member.

7. The power module electrode bending mechanism according to claim 6, characterized in that: The second rotating arm (35) is an arc-shaped plate, and the first sliding groove (311) and the second sliding groove (321) are both arc-shaped and have the same motion trajectory as the second rotating arm (35).

8. A power module electrode bending mechanism according to any one of claims 2 to 7, characterized in that: At least one pair of guide rods (11) is fixed on the frame (1), and the first movable plate (41) and the second movable plate (42) penetrate into the pair of guide rods (11) and are slidably connected thereto.

9. The power module electrode bending mechanism according to claim 1, characterized in that: The module (2) is provided with three square holes (21) for inserting electrodes.

10. The power module electrode bending mechanism according to claim 1, characterized in that: The bottom of the frame (1) is provided with a limiting groove (12) for the module (2) to be embedded.

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