Vacuum reflow soldering guide rail

Abstract

The utility model provides a vacuum reflow soldering guide rail, and relates to the technical field of reflow soldering. The device comprises a guide rail, a flow guide groove and a mounting port, a circuit board is movably connected above a transmission chain in the flow guide groove, a tensioning wheel is rotatably connected to the side wall of a mounting plate, the transmission chain is in transmission connection with the tensioning wheel, a sliding cavity is formed in the side wall of the mounting plate, and a sliding block located in the sliding cavity is rotatably connected to the side of the tensioning wheel. In a reflow soldering device in the prior art, the size of a guide rail used for transmitting a circuit board is fixed, the guide rail is difficult to adapt to circuit boards with different sizes, so that the circuit board cannot be smoothly transmitted, a sliding sleeve is in threaded connection with a threaded rod, the left section and the right section of the threaded rod correspond to the guide rail, and the left section and the right section of the threaded rod are arranged in a group; and in the rotating process of the threaded rod, the guide rails can be pushed to move to adjust the distance between the guide rails, transmission of circuit boards of different sizes can be adapted, and practicability is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of reflow soldering, in particular to a vacuum reflow soldering guide rail. Background Art

[0002] At present, vacuum reflow soldering, also known as vacuum / controlled atmosphere eutectic furnace, has the characteristics of uniform temperature, ultra-low temperature safe welding, no temperature difference, no overheating, reliable and stable process parameters, no need for complex process tests, and low environmental protection cost operation. It can meet the needs of multi-variety, small batch, and high-reliability welding of military products.

[0003] The Chinese utility model patent with publication number CN205551723U in the prior art relates to a double-guide reflow soldering machine, comprising a furnace body and a feed box with PCB boards stacked thereon; the furnace body comprises a feed port and double guides arranged in parallel; there are two feed boxes arranged one by one corresponding to the two guides; a lifting cylinder is arranged at the bottom of the feed box; the upper end of the feed box is open and a concave cavity is arranged on both sides of the inner wall, a worm and a rotating motor driving the worm are arranged in the concave cavity; a brush is arranged on the surface of the worm; the furnace body also includes a control host; the lifting cylinder and the rotating motor are both electrically connected to the control host and controlled by the control host; when feeding, the PCB board is lifted upward by the lifting cylinder, and then the worm is driven to rotate by the rotating motor, so that the PCB board enters the guide rail under the action of the brush, saving production space, having a high degree of automation, reducing the labor intensity of workers, and avoiding the static electricity caused by human contact with the PCB board; the furnace hearth and the high temperature resistant probe are arranged to facilitate better control of the local temperature; the parallel double guide rails are arranged to improve the processing efficiency.

[0004] However, in this type of reflow soldering device, the size of the guide rail used to transfer the circuit board is fixed, which is difficult to adapt to circuit boards of different sizes, and the width of the guide rail cannot be adjusted, resulting in the circuit board being unable to be transferred smoothly. Utility Model Content

[0005] In order to solve the above technical problems, the utility model provides a vacuum reflow soldering guide rail to solve the problem that in the reflow soldering device in the prior art, the size of the guide rail used to transmit the circuit board is fixed, it is difficult to adapt to circuit boards of different sizes, and the width of the guide rail cannot be adjusted, resulting in the circuit board cannot be smoothly transmitted.

[0006] The utility model discloses a vacuum reflow soldering guide rail, the purpose and effect of which are achieved by the following specific technical means: a vacuum reflow soldering guide rail, comprising a guide rail, a guide groove and a mounting opening, the guide groove being arranged on the side wall of the guide rail, the mounting opening being arranged below the guide groove, the guide rail being arranged in two corresponding left and right positions, a mounting plate being fixedly connected in the mounting opening, a threaded rod being arranged below the guide rail, a transmission wheel being rotatably connected on the inner wall of the guide groove and the side wall of the mounting plate, a transmission chain located in the guide groove being transmission-connected on the side wall of the transmission wheel, a circuit board being movably connected in the guide groove above the transmission chain, a tensioning wheel being rotatably connected on the side wall of the mounting plate, the transmission chain and the tensioning wheel being transmission-connected, a sliding cavity being arranged on the side wall of the mounting plate, a sliding block located in the sliding cavity being rotatably connected on the side of the tensioning wheel.

[0007] Preferably, the sliding block and the sliding cavity are slidably connected.

[0008] Preferably, a pull rod is threadedly connected to the bottom of the mounting plate.

[0009] Preferably, the top end of the pull rod penetrates into the sliding cavity and is rotatably connected to the sliding block.

[0010] Preferably, the pull rod and the side wall of the mounting plate are both provided with limiting grooves, and a latch passes through the limiting grooves.

[0011] Preferably, there are a plurality of limiting grooves on the side wall of the pull rod arranged in sequence.

[0012] Preferably, a sliding sleeve is fixedly connected to the bottom of the guide rail, and the sliding sleeve is threadedly connected to the threaded rod.

[0013] Preferably, the threads at both ends of the threaded rod are arranged in opposite directions.

[0014] Beneficial effects:

[0015] 1. Through the threaded connection between the sliding sleeve and the threaded rod, the threaded rod is set in two sections corresponding to the guide rails, and the threaded rod is set in a group of two on the left and right, so that when the threaded rod rotates and pushes the threaded sleeve to move, the guide rail will not be driven to rotate together. Therefore, during the rotation of the threaded rod, the guide rail can be pushed to move and adjust the distance between them, which can adapt to the transmission of circuit boards of different sizes and improve practicality.

[0016] 2. A cavity is opened inside the slider, and a pull rod is threadedly connected to the bottom of the mounting plate. The top of the pull rod passes through the sliding cavity and extends into the cavity. The top of the pull rod is rotatably connected to a connecting block located in the cavity. When the pull rod is rotated and moved downward, the top of the pull rod will rotate at the bottom of the slider to pull it downward. When the slider moves, it will drive the tensioning wheel to move downward. When the tensioning wheel moves, the tensioning of the transmission chain will be adjusted, thereby improving the stability of the transmission chain when transmitting the circuit board. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0018] Figure 2 It is a schematic diagram of the top cross-sectional structure of the utility model.

[0019] Figure 3 It is a schematic diagram of the cross-sectional structure of the mounting plate in the utility model.

[0020] Figure 4 For the utility model Figure 3 A is an enlarged schematic diagram of the structure.

[0021] Figure 1-4 In the figure, the correspondence between the component names and the figure numbers is: guide rail-1, guide groove-2, transmission wheel-201, transmission chain-3, circuit board-301, tensioning wheel-4, slider-401, mounting plate-5, mounting port-501, sliding cavity-502, threaded rod-6, sliding sleeve-601, pull rod-7.

[0022] The following will clearly and completely describe the technical solutions in the embodiments of the utility model in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model. DETAILED DESCRIPTION

[0023] As attached Figure 1 To Attachment Figure 4 As shown: a vacuum reflow soldering guide rail, including a guide rail 1, a guide groove 2 and a mounting opening 501, the guide groove 2 is opened on the side wall of the guide rail 1, the mounting opening 501 is opened below the guide groove 2, and a mounting plate 5 is fixedly connected in the mounting opening 501.

[0024] A threaded rod 6 is fixedly installed below the guide rail 1 , and one end of the threaded rod 6 is connected to a motor drive.

[0025] It should be understood that the above-mentioned fixed connection means that there can be no relative movement between the two. There are many ways of fixed connection. Bolts can be used here to fix it, making it more convenient to disassemble and maintain the installation plate 5 later.

[0026] The inner wall of the guide groove 2 and the side wall of the mounting plate 5 are both rotatably connected with a transmission wheel 201, so that the transmission wheel 201 can rotate in the guide groove 2 and on the side wall of the mounting plate 5.

[0027] The guide rails 1 are installed in two corresponding positions on the left and right sides, and the side wall of the transmission wheel 201 is connected to the transmission chain 3 located in the guide groove 2. When the transmission wheel 201 drives the transmission chain 3 to move in the guide groove 2, the transmission chain 3 will be transmitted downward to the top of the transmission wheel 201 on the side wall of the mounting plate 5. A motor is fixedly installed on the other side of the transmission wheel 201, and the side output end of the motor is fixedly connected to the transmission wheel 201, so that the motor drives the transmission wheel 201 to rotate and drives the transmission chain 3 to run more conveniently.

[0028] Among them, a circuit board 301 is slidably connected in the guide groove 2 above the transmission chain 3, and the circuit board 301 is transmitted through the transmission chain 3.

[0029] A tensioning wheel 4 is rotatably connected to the side wall of the mounting plate 5. The tensioning wheel 4 is located below the transmission wheel 201. The transmission chain 3 and the tensioning wheel 4 are transmission-connected, so that the transmission wheel 201 transmits the transmission chain 3 to the top of the tensioning wheel 4. The transmission chain 3 continues to be transmitted into the guide groove 2 through the tensioning wheel 4.

[0030] A sliding cavity 502 is provided on the side wall of the mounting plate 5, and the tensioning wheel 4 is rotatably connected to a slider 401 located in the sliding cavity 502, so that the slider 401 can support the tensioning wheel 4 on one side of the mounting plate 5 to transmit the transmission chain 3. Example

[0031] As attached Figure 1 To Attachment Figure 4 As shown: the slider 401 is slidably connected in the sliding cavity 502, so that when the slider 401 slides in the sliding cavity 502, the slider 401 will drive the side tensioning wheel 4 to rise and fall on the side wall of the mounting plate 5. When the tensioning wheel 4 rises and falls, the transmission chain 3 on the outer wall of the tensioning wheel 4 will be affected by the tension of the tensioning wheel 4 when it is raised and lowered, thereby realizing the tension adjustment of the transmission chain 3 during operation.

[0032] As attached Figure 1 To Attachment Figure 4 As shown: the bottom of the mounting plate 5 is threadedly connected with a pull rod 7, the top of the pull rod 7 passes through the sliding cavity 502 and is rotatably connected to the connecting block, and then when the pull rod 7 is rotated at the bottom of the mounting plate 5, the pull rod 7 can pull the slider 401 in the sliding cavity 502 to move downward.

[0033] As attached Figure 1 To Attachment Figure 4 As shown: the mounting plate 5 and the side wall of the pull rod 7 are provided with limiting grooves, and the limiting grooves on the side wall of the pull rod 7 are arranged in sequence in multiple numbers, and a latch penetrates the limiting groove, so that after the pull rod 7 moves downward, the pull rod 7 can be limited by inserting the latch into the limiting groove.

[0034] As attached Figure 1 To Attachment Figure 4As shown: a sliding sleeve 601 is fixedly connected to the bottom of the guide rail 1, and the sliding sleeve 601 is threadedly connected to the threaded rod 6. The threaded rod 6 is used to set the left and right sections corresponding to the guide rail 1, and the threaded rod 6 is set in a group of two left and right rods, so that when the threaded rod 6 pushes the threaded sleeve 601 to move, it will not drive the guide rail 1 to rotate together. Therefore, during the rotation of the threaded rod 6, the guide rail 1 can be pushed to move and adjust the distance between them, which can adapt to the transmission of circuit boards 301 of different sizes, thereby improving practicality.

[0035] Working principle: The corresponding threaded rod 6 is driven by a motor to rotate, so that the threaded rod 6 will push the upper threaded sleeve 601 to drive the guide rail 1 to move and adjust the spacing between them, thereby adapting to the transmission of circuit boards 301 of different sizes. When the transmission wheel 201 is driven by the motor, the transmission chain 3 will be driven to transmit the circuit board 301 in the guide groove 2, and the pull rod 7 under the mounting plate 5 will be rotated. The top of the pull rod 7 will pull it downward at the bottom rotating part of the slider 401. After the pull rod 7 pulls the slider 401 downward, the pin is inserted into the limiting groove on the side wall of the mounting plate 5, so that the side end of the pin passes through the corresponding limiting groove on the side wall of the pull rod 7 to limit it, preventing the pull rod 7 from loosening, so that after the slider 401 moves, it will drive the tensioning wheel 4 to move downward. After the tensioning wheel 4 moves, the tensioning of the transmission chain 3 will be adjusted, thereby improving the stability of the transmission chain 3 when transmitting the circuit board 301.

Claims

1. A vacuum reflow soldering guide rail, comprising a guide rail (1), a guide groove (2) and a mounting opening (501), wherein the guide groove (2) is provided on a side wall of the guide rail (1), and the mounting opening (501) is provided below the guide groove (2), and the guide rail (1) is provided with two corresponding left and right rails, characterized in that: A mounting plate (5) is fixedly connected in the mounting opening (501), a threaded rod (6) is arranged below the guide rail (1), a transmission wheel (201) is rotatably connected on the inner wall of the guide groove (2) and the side wall of the mounting plate (5), a transmission chain (3) located in the guide groove (2) is transmission-connected on the side wall of the transmission wheel (201), a circuit board (301) is movably connected above the transmission chain (3) and located in the guide groove (2), a tensioning wheel (4) is rotatably connected on the side wall of the mounting plate (5), the transmission chain (3) and the tensioning wheel (4) are transmission-connected, a sliding cavity (502) is provided on the side wall of the mounting plate (5), and a sliding block (401) located in the sliding cavity (502) is rotatably connected to the side of the tensioning wheel (4).

2. The vacuum reflow soldering guide rail according to claim 1, characterized in that: The sliding block (401) and the sliding cavity (502) are slidably connected.

3. The vacuum reflow soldering guide rail according to claim 1, characterized in that: The bottom of the mounting plate (5) is threadedly connected with a pull rod (7).

4. The vacuum reflow soldering guide rail according to claim 3, characterized in that: The top end of the pull rod (7) passes through the sliding cavity (502) and is rotatably connected to the sliding block (401).

5. The vacuum reflow soldering guide rail according to claim 4, characterized in that: The pull rod (7) and the side wall of the mounting plate (5) are both provided with a limiting groove, and a latch pin runs through the limiting groove.

6. The vacuum reflow soldering guide rail according to claim 5, characterized in that: There are a plurality of limiting grooves on the side wall of the pull rod (7) arranged in sequence.

7. The vacuum reflow soldering guide rail according to claim 1, characterized in that: A sliding sleeve (601) is fixedly connected to the bottom of the guide rail (1), and the sliding sleeve (601) is threadedly connected to the threaded rod (6).

8. The vacuum reflow soldering guide rail according to claim 1, characterized in that: The threads at both ends of the threaded rod (6) are arranged in opposite directions.

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