Uniform heating structure of reflow soldering hearth

Abstract

The utility model belongs to the field of heating structures, and particularly relates to a uniform heating structure of a reflow soldering hearth, which comprises a hearth shell, an insulation board is mounted on the inner wall of the hearth shell, a plurality of guide holes are formed in the top of the hearth shell, guide rods are mounted in the guide holes in a sliding manner, and a same adjusting plate is fixedly mounted at the bottoms of the plurality of guide rods. A heating assembly is arranged at the bottom of the adjusting plate and comprises vertical rods, a main heater, mounting plates and an auxiliary heater, the vertical rods are fixedly mounted at the bottom of the adjusting plate, the same main heater is fixedly mounted at the bottom ends of the vertical rods, the mounting plates are arranged on the two sides of the main heater, and rotating mechanisms are arranged between the mounting plates and the vertical rods. According to the utility model, the design is reasonable, and the heating intensity can be adjusted through the movement of the main heater and the auxiliary heater and the angle adjustment of the auxiliary heater, so that the purpose of uniformly heating circuit boards with different sizes can be realized.

Description

Technical Field

[0001] This utility model relates to the field of heating structure technology, and in particular to a uniform heating structure for a reflow oven. Background Technology

[0002] Reflow soldering is a commonly used soldering process in SMT (Surface Mount Technology). Its principle is to remelt the pre-applied solder paste onto the printed circuit board pads, achieving mechanical and electrical connections between the surface mount components' leads and the pads. During reflow soldering, the uniformity of heating within the oven chamber has a crucial impact on the soldering quality.

[0003] Existing reflow oven heating structures have some shortcomings. For example, it is difficult to flexibly adjust the spacing between the heating components and the circuit board, as well as the heating intensity and range, for circuit boards of different sizes. This makes it impossible to achieve uniform heating of circuit boards of various sizes, which can easily lead to poor soldering, such as cold solder joints and short circuits. Therefore, we propose a uniform heating structure for reflow ovens to solve the above problems. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a uniform heating structure for a reflow oven.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A uniform heating structure for a reflow oven includes an oven shell, an insulation plate installed on the inner wall of the oven shell, multiple guide holes opened at the top of the oven shell, guide rods slidably installed in the guide holes, a common adjusting plate fixedly installed at the bottom of the multiple guide rods, and a heating component provided at the bottom of the adjusting plate.

[0007] The heating assembly includes a vertical rod, a main heater, a mounting plate, and an auxiliary heater. The vertical rod is fixedly installed at the bottom of the adjusting plate, and the same main heater is fixedly installed at the bottom of multiple vertical rods. Mounting plates are provided on both sides of the main heater, and a rotating mechanism is provided between the mounting plate and the vertical rod. The auxiliary heater is fixedly installed at the bottom of the mounting plate.

[0008] Preferably, the rotating mechanism includes a rotating shaft and a rotating seat. The rotating shaft is rotatably mounted between two corresponding vertical rods, and the rotating seat is fixedly mounted on the rotating shaft and fixedly connected to the mounting plate.

[0009] Preferably, a threaded hole is provided on the top inner wall of the furnace shell, an adjusting screw is installed in the threaded hole, the bottom end of the adjusting screw is rotatably mounted on the adjusting plate, and a knob is fixedly installed on the top end of the adjusting screw.

[0010] Preferably, the top of the adjusting plate is provided with a rotating groove, the inner wall of the rotating groove is provided with an annular groove, and an annular seat is fixedly installed on the adjusting screw, and the annular seat is rotatably connected to the annular groove.

[0011] Preferably, the bottom of the adjustment plate has two movable slots, a movable seat is slidably installed in the movable slot, the bottom of the movable seat is hinged to a hinge rod, and the bottom end of the hinge rod is hinged to the corresponding mounting plate.

[0012] Preferably, the same threaded rod is rotatably mounted on the inner wall of the two movable slots on opposite sides, and the movable seat is threaded onto the threaded rod.

[0013] Preferably, the threaded rod is provided with two external threads with opposite directions of rotation, and the movable seat is provided with an internal threaded hole, and the external threads mesh with the internal threaded hole.

[0014] Preferably, the top of the adjusting plate has a rectangular hole, and a threaded rod passes through the rectangular hole. A rotating gear is fixedly sleeved on the threaded rod. A connecting plate is fixedly installed on the top of the furnace shell, and a straight rack is fixedly installed on the front side of the connecting plate. The rotating gear meshes with the straight rack.

[0015] The beneficial effects of this utility model are:

[0016] 1. When the circuit board is transported to the bottom of the heating assembly, the main heater and the auxiliary heater can heat the circuit board.

[0017] 2. When the circuit boards are of different sizes, the adjustment screw can be moved by the handwheel, adjustment screw and threaded hole. The adjustment screw can move the adjustment plate, and the adjustment plate can move the main heater and the auxiliary heater by the vertical rod, so as to adjust the distance between the main heater, the auxiliary heater and the circuit board.

[0018] 3. Through the action of the adjusting plate, rack and pinion, and rotating gear, the rotating gear can drive the threaded rod to rotate, and the threaded rod can drive the two moving seats to move away from each other. The moving seats, through the hinge rod, drive the mounting plate and auxiliary heater to rotate towards the main heater, thus achieving the purpose of centralized heating. By moving the main heater and auxiliary heater and adjusting the angle of the auxiliary heater, circuit boards of different sizes can be heated as needed. Attached Figure Description

[0019] Figure 1 This is a three-dimensional structural diagram of a uniform heating structure for a reflow oven chamber proposed in this utility model.

[0020] Figure 2 This is a cross-sectional three-dimensional structural diagram of a uniform heating structure for a reflow oven proposed in this utility model;

[0021] Figure 3 This is a partial three-dimensional structural diagram of a uniform heating structure for a reflow oven chamber proposed in this utility model.

[0022] Figure 4 for Figure 3 A schematic diagram of a partial three-dimensional structure.

[0023] In the diagram: 101, furnace shell; 102, insulation plate; 201, guide hole; 202, guide rod; 203, adjusting plate; 301, threaded hole; 302, adjusting screw; 303, knob; 401, vertical rod; 402, main heater; 403, rotating shaft; 404, rotating seat; 405, mounting plate; 406, auxiliary heater; 501, moving slot; 502, threaded rod; 503, moving seat; 504, hinge rod; 601, rectangular hole; 602, rotating gear; 603, connecting plate; 604, straight rack. Detailed Implementation

[0024] The following is in conjunction with the appendix Figure 1-4 This application will be described in further detail.

[0025] This application discloses a uniform heating structure for a reflow oven.

[0026] Reference Figure 1-4 A uniform heating structure for a reflow oven includes an oven shell 101. An insulation plate 102 is installed on the inner wall of the oven shell 101. Multiple guide holes 201 are opened at the top of the oven shell 101. Guide rods 202 are slidably installed in the guide holes 201. A common adjusting plate 203 is fixedly installed at the bottom of the multiple guide rods 202. A heating assembly is provided at the bottom of the adjusting plate 203. The heating assembly includes a vertical rod 401, a main heater 402, a mounting plate 405, and an auxiliary heater 406. The vertical rod 401 is fixedly installed at the bottom of the adjusting plate 203. A common main heater 402 is fixedly installed at the bottom of the multiple vertical rods 401. Mounting plates 405 are provided on both sides of the main heater 402. A rotating mechanism is provided between the mounting plate 405 and the vertical rod 401. The auxiliary heater 406 is fixedly installed at the bottom of the mounting plate 405.

[0027] In this embodiment, the rotating mechanism includes a rotating shaft 403 and a rotating seat 404. The rotating shaft 403 is rotatably mounted between two corresponding vertical rods 401, and the rotating seat 404 is fixedly mounted on the rotating shaft 403. The rotating seat 404 is fixedly connected to the mounting plate 405. This design of the rotating mechanism provides a flexible base for the mounting plate 405 and the auxiliary heater 406 to rotate. When it is necessary to adjust the angle of the auxiliary heater 406 to adapt to the heating requirements of different circuit boards, the mounting plate 405 can easily rotate around the rotating shaft 403.

[0028] In this embodiment, a threaded hole 301 is provided on the top inner wall of the furnace shell 101. An adjusting screw 302 is installed in the threaded hole 301, and the bottom end of the adjusting screw 302 is rotatably mounted on the adjusting plate 203. A knob 303 is fixedly installed on the top end of the adjusting screw 302. A rotating groove is provided on the top of the adjusting plate 203, and an annular groove is provided on the inner wall of the rotating groove. An annular seat is fixedly installed on the adjusting screw 302, and the annular seat is rotatably connected to the annular groove. The cooperation between the rotating groove, the annular groove, and the annular seat ensures the stability and smoothness of the adjusting screw 302 during rotation.

[0029] In this embodiment, the bottom of the adjusting plate 203 has two movable slots 501. A movable seat 503 is slidably installed in the movable slots 501. A hinge rod 504 is hinged to the bottom of the movable seat 503, and the bottom end of the hinge rod 504 is hinged to the corresponding mounting plate 405. The movable slots 501 and the movable seat 503 provide the basic structure for the mechanical transmission of the auxiliary heater 406 angle adjustment. When the movable seat 503 moves in the movable slots 501, the hinge rod 504 can stably drive the mounting plate 405 to rotate, thereby adjusting the angle of the auxiliary heater 406.

[0030] In this embodiment, a threaded rod 502 is rotatably mounted on the inner wall of the two moving slots 501 on opposite sides. The moving seat 503 is threaded onto the threaded rod 502. The threaded rod 502 has two external threads with opposite directions of rotation. The moving seat 503 has an internal threaded hole 301, and the external threads mesh with the internal threaded hole 301. The engagement between the external threads with opposite directions of rotation on the threaded rod 502 and the internal threaded hole 301 of the moving seat 503 allows the two moving seats 503 to move synchronously in opposite directions or towards each other when the threaded rod 502 rotates.

[0031] In this embodiment, a rectangular hole 601 is provided at the top of the adjusting plate 203, and a threaded rod 502 passes through the rectangular hole 601. A rotating gear 602 is fixedly sleeved on the threaded rod 502. A connecting plate 603 is fixedly installed at the top of the furnace shell 101, and a rack 604 is fixedly installed on the front side of the connecting plate 603. The rotating gear 602 meshes with the rack 604. When the adjusting plate 203 moves up and down, the rotating gear 602 moves with the adjusting plate 203 and meshes with the rack 604, thereby achieving rotation and driving the threaded rod 502 to rotate. This ingenious structural design transforms the up and down movement of the adjusting plate 203 into the rotation of the threaded rod 502, realizing the linkage between the angle adjustment of the auxiliary heater 406 and the overall height adjustment of the heating assembly.

[0032] In this invention, when the circuit board is transported to the bottom of the heating assembly, the main heater 402 and the auxiliary heater 406 can heat the circuit board. When the circuit board is of different sizes, by rotating the handwheel and adjusting screw 302, under the action of the threaded hole 301, the adjusting screw 302 can rotate and move at the same time. The adjusting screw 302 can move the adjusting plate 203. The adjusting plate 203 is moved by the vertical rod 401 to the main heater 402 and the auxiliary heater 406, thereby achieving the purpose of adjusting the distance between the main heater 402, the auxiliary heater 406 and the circuit board. When the adjusting plate 203 moves downward, the rotating gear 602, which follows the adjusting plate 203 downward, rotates under the action of the rack 604. The rotating gear 602 drives the threaded rod 502 to rotate, and the threaded rod 502 drives the two moving seats 503 to move away from each other. The moving seats 503 drive the mounting plate 405 and the auxiliary heater 406 to rotate closer to the main heater 402 through the hinge rod 504, so as to achieve the purpose of centralized heating. By moving the main heater 402 and the auxiliary heater 406 and adjusting the angle of the auxiliary heater 406, circuit boards of different sizes can be heated as needed.

[0033] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A uniform heating structure for a reflow oven, characterized in that, The furnace includes a furnace shell (101), on which an insulation plate (102) is installed. The top of the furnace shell (101) has multiple guide holes (201), and guide rods (202) are slidably installed in the guide holes (201). The bottom of the multiple guide rods (202) is fixedly installed with the same adjusting plate (203), and the bottom of the adjusting plate (203) is provided with a heating component. The heating assembly includes a vertical rod (401), a main heater (402), a mounting plate (405), and an auxiliary heater (406). The vertical rod (401) is fixedly installed at the bottom of the adjusting plate (203). The same main heater (402) is fixedly installed at the bottom of multiple vertical rods (401). Mounting plates (405) are provided on both sides of the main heater (402). A rotating mechanism is provided between the mounting plate (405) and the vertical rod (401). The auxiliary heater (406) is fixedly installed at the bottom of the mounting plate (405).

2. The uniform heating structure for a reflow oven furnace according to claim 1, characterized in that, The rotating mechanism includes a rotating shaft (403) and a rotating seat (404). The rotating shaft (403) is rotatably mounted between two corresponding vertical rods (401). The rotating seat (404) is fixedly mounted on the rotating shaft (403), and the rotating seat (404) is fixedly connected to the mounting plate (405).

3. The uniform heating structure of a reflow oven furnace according to claim 1, characterized in that, A threaded hole (301) is provided on the top inner wall of the furnace shell (101). An adjusting screw (302) is installed in the threaded hole (301), and the bottom end of the adjusting screw (302) is rotatably installed on the adjusting plate (203). A knob (303) is fixedly installed on the top end of the adjusting screw (302).

4. The uniform heating structure of a reflow oven furnace according to claim 3, characterized in that, The top of the adjusting plate (203) is provided with a rotating groove, and the inner wall of the rotating groove is provided with an annular groove. An annular seat is fixedly installed on the adjusting screw (302), and the annular seat is rotatably connected to the annular groove.

5. The uniform heating structure for a reflow oven furnace according to claim 1, characterized in that, The bottom of the adjustment plate (203) has two moving slots (501), and a moving seat (503) is slidably installed in the moving slot (501). The bottom of the moving seat (503) is hinged to a hinge rod (504), and the bottom end of the hinge rod (504) is hinged to the corresponding mounting plate (405).

6. The uniform heating structure of a reflow oven furnace according to claim 5, characterized in that, The same threaded rod (502) is rotatably mounted on the inner wall of the two movable slots (501) on the side away from each other, and the movable seat (503) is threaded onto the threaded rod (502).

7. The uniform heating structure of a reflow oven furnace according to claim 6, characterized in that, The threaded rod (502) is provided with two external threads with opposite directions of rotation, and the movable seat (503) is provided with an internal thread hole (301), and the external threads mesh with the internal thread hole (301).

8. The uniform heating structure of a reflow oven furnace according to claim 6, characterized in that, The top of the adjusting plate (203) is provided with a rectangular hole (601), and the threaded rod (502) passes through the rectangular hole (601). A rotating gear (602) is fixedly sleeved on the threaded rod (502). A connecting plate (603) is fixedly installed on the top of the furnace shell (101). A straight rack (604) is fixedly installed on the front side of the connecting plate (603), and the rotating gear (602) meshes with the straight rack (604).

Images