Thermoelectric device welding fixture

Abstract

The utility model provides a kind of thermoelectric device welding fixture, including main body frame, frame, baffle, fixed plate, upper pressing block, elastic element, screw and lower pressing block;The frame is used to insert into main body frame, and is carried on the load-bearing surface of the inner bottom of main body frame;Left side wall and right side wall of frame are equipped with a plurality of corresponding first vertical holes, for the first group baffle insertion;Front side wall and rear side wall of frame are equipped with a plurality of corresponding second vertical holes, for the second group baffle insertion;First vertical hole and second vertical hole are staggered in height;When the first group baffle is inserted into the first vertical hole on the left side wall and the right side wall of frame, and the second group baffle is inserted into the second vertical hole on the front side wall and the rear side wall of frame, cell is formed in grid distribution in frame;Lower pressing block and the inner wall of frame are slidingly engaged, and can slide up and down in frame;The utility model can adapt to thermoelectric device of different thickness, and can realize accurate positioning to thermoelectric unit.

Description

Technical Field

[0001] This utility model relates to a clamp, and more particularly to a welding clamp for thermoelectric devices. Background Technology

[0002] Thermoelectric devices are composed of multiple thermoelectric units (including alternating P-type and N-type units) connected in series. Traditional thermoelectric device welding fixtures suffer from fixed structures and poor adaptability, making it difficult to meet the welding requirements of thermoelectric devices of different thicknesses. Replacing fixtures is costly and inefficient. Furthermore, traditional fixtures rely on single-directional constraint for positioning thermoelectric units, constraining them in only one degree of freedom. Traditional fixtures also struggle to achieve uniform pressure control, easily causing deformation of thermoelectric units or welding points due to excessive local pressure. Summary of the Invention

[0003] To address the shortcomings of existing technologies, this utility model provides a thermoelectric device welding fixture that can adapt to thermoelectric devices of different thicknesses, accurately position the thermoelectric unit to prevent displacement, and provide stable and uniform pressure to the thermoelectric unit and connecting piece during welding. To achieve the above technical objectives, the technical solution adopted by this utility model is as follows: This utility model provides a thermoelectric device welding fixture, including a main frame, a frame body, a baffle, a fixing plate, an upper pressure block, an elastic element, screws, and a lower pressure block; The bottom of the main frame is a bearing surface; the main frame has rectangular openings on at least the left and right sides for inserting fixing plates; a left crossbar and a right crossbar are formed above the rectangular openings on the left and right sides of the main frame, respectively; The frame is used to be placed in the main frame and supported on the bearing surface at the bottom of the main frame; the left and right sides of the frame are provided with a plurality of corresponding first vertical holes for the insertion of a first set of baffles; the front and rear sides of the frame are provided with a plurality of corresponding second vertical holes for the insertion of a second set of baffles; the first and second vertical holes are staggered in height; when the first set of baffles is inserted into the first vertical holes on the left and right sides of the frame, and the second set of baffles is inserted into the second vertical holes on the front and rear sides of the frame, a grid-like distribution of cells is formed in the frame; The pressing block slides within the inner wall of the frame, allowing it to slide up and down within the frame. The upper and lower ends of the elastic element abut against the upper and lower pressure blocks, respectively; the upper pressure block, the elastic element, and the lower pressure block are distributed from high to low in sequence and are located above the frame. The fixing plate is located above the upper pressure block, and the left and right ends of the fixing plate are located below the left and right crossbars of the main frame, respectively; the center of the fixing plate is provided with a through threaded hole. The screw connects to the fixing plate through a through threaded hole in the center of the fixing plate and is used to abut against the upper pressure block to apply pressure to the upper pressure block.

[0004] Furthermore, a blind hole is provided at the center of the upper surface of the upper pressure block; the through threaded hole provided at the center of the fixing plate corresponds to the blind hole provided at the center of the upper surface of the upper pressure block.

[0005] Furthermore, the lower surface center of the upper pressure block and the upper surface center of the lower pressure block are respectively provided with receiving grooves to accommodate the upper and lower ends of the elastic element.

[0006] Furthermore, the through threaded hole at the center of the fixing plate, the blind hole at the center of the upper surface of the upper pressure block 5, the receiving groove at the center of the lower surface of the upper pressure block, and the receiving groove at the center of the upper surface of the lower pressure block are coaxially arranged.

[0007] Furthermore, the receiving groove at the center of the lower surface of the upper pressure block and the receiving groove at the center of the upper surface of the lower pressure block are specifically circular grooves.

[0008] Furthermore, the elastic element is a spring.

[0009] The beneficial effects of the technical solution provided by this utility model embodiment are as follows:

[0010] 1) It can adapt to thermoelectric devices of different thicknesses.

[0011] 2) It can accurately position the thermoelectric unit and avoid its displacement, effectively avoiding PN junction displacement caused by factors such as vibration and operation errors during the welding process, thus improving the welding quality of thermoelectric devices and the stability of the entire welding process.

[0012] 3) It can provide stable and uniform pressure to the thermoelectric unit and connecting plate; avoid excessive local pressure causing damage to the PN junction; and the pressure can be adjusted by screws.

[0013] 4) Compared with traditional welding and fixing methods that rely on experience, this fixture can reduce the preparation and debugging time and improve the overall efficiency of thermoelectric device welding operations. Attached Figure Description

[0014] Figure 1 This is an exploded view of the welding fixture in an embodiment of this utility model.

[0015] Figure 2 This is a top view of the welding fixture in an embodiment of the present invention.

[0016] Figure 3 This is a schematic diagram of the welding fixture assembly in an embodiment of the present invention.

[0017] Figure 4This is a schematic diagram of the thermoelectric units arranged in a row in an embodiment of this utility model. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this utility model and are not intended to limit this utility model.

[0019] like Figure 1 , Figure 2 and Figure 3 As shown in the figure, a thermoelectric device welding fixture proposed in this embodiment of the present invention includes a main frame 1, a frame 2, a baffle 3, a fixing plate 4, an upper pressure block 5, an elastic element 6, a screw 7, and a lower pressure block 8. The bottom of the main frame 1 is a bearing surface; the main frame 1 has rectangular openings on at least the left and right sides for the insertion of the fixing plate 4; a left crossbar 101 and a right crossbar 102 are formed above the rectangular openings on the left and right sides of the main frame 1, respectively. The frame 2 is used to be placed in the main frame 1 and supported on the bearing surface at the bottom of the main frame 1; the left and right side walls of the frame 2 are provided with a plurality of corresponding first vertical holes 201 for the insertion of the first set of baffles 3; the front and rear side walls of the frame 2 are provided with a plurality of corresponding second vertical holes 202 for the insertion of the second set of baffles 3; the first vertical holes 201 and the second vertical holes 202 are staggered in height; when the first set of baffles 3 is inserted into the first vertical holes 201 on the left and right side walls of the frame 2, and the second set of baffles 3 is inserted into the second vertical holes 202 on the front and rear side walls of the frame 2, a grid-like distribution of cells 203 is formed in the frame 2; The pressing block 8 is slidably engaged with the inner wall of the frame 2, and can slide up and down within the frame 2; The upper and lower ends of the elastic element 6 abut against the upper pressure block 5 and the lower pressure block 8, respectively; the upper pressure block 5, the elastic element 6 and the lower pressure block 8 are distributed from high to low in sequence and are located above the frame 2. The fixing plate 4 is located above the upper pressure block 5, and the left and right ends of the fixing plate 4 are located below the left crossbar 101 and the right crossbar 102 of the main frame 1, respectively; the center of the fixing plate 4 is provided with a through threaded hole 401. The screw 7 is connected to the fixing plate 4 through the through threaded hole 401 provided in the center of the fixing plate 4, and is used to abut against the upper pressure block 5 to apply pressure to the upper pressure block 5.

[0020] Before soldering thermoelectric devices, such as Figure 4As shown, firstly, the P-type units and N-type units are alternately arranged in a grid pattern. Solder paste is applied to the bottom of each P-type unit and N-type unit, and alternately distributed connecting pieces b are attached. These P-type units and N-type units, along with the connecting pieces b at the bottom, are placed on the bearing surface at the bottom of the main frame 1. The frame 2, with the first set of baffles 3 and the second set of baffles 3 inserted, is placed into the main frame 1, so that each P-type unit and N-type unit is located in each cell 203 within the frame 2. Then, solder paste is applied to the top of each P-type unit and N-type unit, and alternately distributed connecting pieces b are attached. At this time, the screw 7 is tightened, and the fixing plate 4 is blocked by the left horizontal bar 101 and the right horizontal bar 102. The screw 7 applies pressure to the upper pressure block 5, and the upper pressure block 7 applies pressure to the lower pressure block 8 through the elastic element 6. The lower pressure block 8 enters the inner space at the top of the frame 2, and the lower pressure block 8 applies a certain pressure to each P-type unit and N-type unit and its top connecting pieces b, so that each P-type unit and N-type unit and its top and bottom connecting pieces b are pressed together. Then, the thermoelectric device welding fixture is fed into the reflow soldering equipment so that each P-type unit and N-type unit is welded to its top and bottom connecting pieces b respectively.

[0021] The thermoelectric device welding fixture proposed in this embodiment can adapt to thermoelectric devices of different thicknesses. That is, when the thickness of the P-type and N-type units of one type of thermoelectric device is different from that of another type of thermoelectric device, the thermoelectric device welding fixture can still be used. It is only necessary to adjust the screw 7 to make the lower pressure block 8 enter the frame 2 at different depths.

[0022] This embodiment of the utility model uses the grid-like distributed cell 203 formed within the frame 2 to constrain each P-type and N-type unit in two degrees of freedom, namely front-back and left-right directions, thereby achieving precise positioning of the thermoelectric unit, preventing its displacement, effectively avoiding PN junction displacement caused by factors such as vibration and operational errors during the welding process, improving the welding quality of thermoelectric devices and the stability of the entire welding process.

[0023] This utility model embodiment uses screw 7, upper pressure block 5, elastic element 6 and lower pressure block 8 to provide stable and uniform pressure to the thermoelectric unit and connecting piece; avoids excessive local pressure causing damage to the PN junction; and the pressure can also be adjusted by screw 7.

[0024] Furthermore, a blind hole 501 is provided at the center of the upper surface of the upper pressure block 5; the through threaded hole 401 provided at the center of the fixing plate 4 corresponds to the blind hole 501 provided at the center of the upper surface of the upper pressure block 5; when the lower end of the screw 7 abuts against the upper pressure block 5, the lower end of the screw 7 can enter the blind hole 501 to prevent the upper pressure block 5 from shifting laterally.

[0025] Furthermore, the lower surface center of the upper pressure block 5 and the upper surface center of the lower pressure block 8 are respectively provided with receiving grooves to accommodate the upper and lower ends of the elastic element 6; this can prevent the elastic element 6 from dislodging from the position between the upper pressure block 5 and the lower pressure block 8. It should be noted that the blind hole 501 provided at the center of the upper surface of the upper pressure block 5 is not connected to the receiving groove provided at the center of the lower surface of the upper pressure block 5.

[0026] Furthermore, the through threaded hole 401 at the center of the fixing plate 4, the blind hole 501 at the center of the upper surface of the upper pressure block 5, the receiving groove at the center of the lower surface of the upper pressure block 5, and the receiving groove at the center of the upper surface of the lower pressure block 8 are coaxially arranged; this ensures that when the screw 7 applies pressure to the upper pressure block 5, the upper pressure block 5, the elastic element 6, and the lower pressure block 8 remain axially stable, preventing any of them from shifting laterally. Specifically, the receiving groove at the center of the lower surface of the upper pressure block 5 and the receiving groove at the center of the upper surface of the lower pressure block 8 are circular grooves.

[0027] Furthermore, the elastic element 6 is a spring; it can exert pressure on the lower pressure block 8 when the upper pressure block 5 is under pressure. The spring ensures that the thermoelectric device to be welded is subjected to stable force.

[0028] Finally, it should be noted that the above specific embodiments are only used to illustrate the technical solution of this utility model and not to limit it. Although this utility model has been described in detail with reference to the embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications and substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A welding fixture for thermoelectric devices, characterized in that, It includes the main frame (1), frame (2), baffle (3), fixing plate (4), upper pressure block (5), elastic element (6), screw (7) and lower pressure block (8); The bottom of the main frame (1) is a bearing surface; the main frame (1) has rectangular openings on at least the left and right sides for the insertion of the fixing plate (4); a left crossbar (101) and a right crossbar (102) are formed above the rectangular openings on the left and right sides of the main frame (1), respectively. The frame (2) is used to be placed in the main frame (1) and supported on the bearing surface at the bottom of the main frame (1); the left and right side walls of the frame (2) are provided with a plurality of corresponding first vertical holes (201) for the insertion of the first set of baffles (3); the front and rear side walls of the frame (2) are provided with a plurality of corresponding second vertical holes (202) for the insertion of the second set of baffles (3); the first vertical holes (201) and the second vertical holes (202) are staggered in height; when the first set of baffles (3) is inserted into the first vertical holes (201) on the left and right side walls of the frame (2), and the second set of baffles (3) is inserted into the second vertical holes (202) on the front and rear side walls of the frame (2), a grid-like distribution of cells (203) is formed in the frame (2); The pressing block (8) slides in conjunction with the inner wall of the frame (2) and can slide up and down inside the frame (2); The upper and lower ends of the elastic element (6) abut against the upper pressure block (5) and the lower pressure block (8) respectively; the upper pressure block (5), the elastic element (6) and the lower pressure block (8) are distributed from high to low in sequence and are located above the frame (2); The fixing plate (4) is located above the upper pressure block (5), and the left and right ends of the fixing plate (4) are located below the left crossbar (101) and right crossbar (102) of the main frame (1), respectively; the center of the fixing plate (4) is provided with a through threaded hole (401); The screw (7) is connected to the fixing plate (4) through the through threaded hole (401) provided in the center of the fixing plate (4) and is used to abut against the upper pressure block (5) to apply pressure to the upper pressure block (5).

2. The thermoelectric device welding fixture as described in claim 1, characterized in that, The upper pressure block (5) has a blind hole (501) at the center of its upper surface; the through threaded hole (401) at the center of the fixing plate (4) corresponds to the blind hole (501) at the center of the upper surface of the upper pressure block (5).

3. The thermoelectric device welding fixture as described in claim 2, characterized in that, The lower surface center of the upper pressure block (5) and the upper surface center of the lower pressure block (8) are respectively provided with receiving grooves to accommodate the upper and lower ends of the elastic element (6).

4. The thermoelectric device welding fixture as described in claim 3, characterized in that, The through threaded hole (401) at the center of the fixed plate (4), the blind hole (501) at the center of the upper surface of the upper pressure block (5), the receiving groove at the center of the lower surface of the upper pressure block (5), and the receiving groove at the center of the upper surface of the lower pressure block (8) are coaxially arranged.

5. The thermoelectric device welding fixture as described in claim 3, characterized in that, The receiving groove at the center of the lower surface of the upper pressure block (5) and the receiving groove at the center of the upper surface of the lower pressure block (8) are specifically circular grooves.

6. The thermoelectric device welding fixture as described in any one of claims 1 to 5, characterized in that, The elastic element (6) is a spring.

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