Conveying device for vacuum furnace

Abstract

The utility model discloses a conveying device for a vacuum furnace, two conveying devices are arranged along the length direction of the vacuum furnace, the two conveying devices are in butt joint and are used for conveying a carrier, each conveying device comprises a conveying mechanism, the conveying mechanisms are fixed at an outlet or an inlet of the vacuum furnace, and the conveying mechanisms are used for conveying the carrier; and the lifting mechanism is fixed in the vacuum furnace. The lifting plate is connected with the lifting driving mechanism, ascends and descends under the driving of the lifting mechanism and is located at the position of the conveying mechanism; the horizontal driving mechanism is fixed on the lifting plate; the push rods are used for bearing carriers on the conveying mechanism, the multiple push rods are arranged in the width direction of the vacuum furnace and extend in the length direction of the vacuum furnace, and the multiple push rods are pushed by the horizontal driving mechanism to move in a reciprocating mode in the length direction. The structure is compact, horizontal and vertical conveying of the carrier can be achieved at the same time, and the machining requirement of the vacuum furnace is met.

Description

Technical Field

[0001] This utility model relates to the field of vacuum furnace technology, and in particular to a conveying device for a vacuum furnace. Background Technology

[0002] Printed circuit boards (PCBs) require a vacuum furnace during processing. The PCB, with components already mounted, is placed on a carrier and transported into a high-temperature furnace chamber, where the solder on both sides of the components melts and bonds to the PCB. The carrier is typically moved by a conveyor, and in some processing areas, it needs to be placed on a heating plate for heating. Therefore, existing technologies usually design lifting devices corresponding to the heating plate to move it up and down. However, this design typically requires multiple lifting devices, resulting in high costs. Utility Model Content

[0003] To overcome the above-mentioned shortcomings, the purpose of this utility model is to provide a conveying device for a vacuum furnace, which has a compact structure and can simultaneously realize the horizontal and vertical transmission of the carrier, thus meeting the processing requirements of the vacuum furnace.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is: a conveying device for a vacuum furnace, wherein two conveying devices are arranged along the length direction of the vacuum furnace, the two conveying devices are connected and used to transport a carrier, and the conveying device includes:

[0005] A conveying mechanism, fixed at the outlet or inlet of the vacuum furnace, is used to convey the carrier;

[0006] A lifting drive mechanism is fixed inside the vacuum furnace;

[0007] A lifting plate, which is connected to the lifting drive mechanism and moves up and down under the drive of the lifting mechanism, and the lifting plate is located at the position of the conveying mechanism;

[0008] A horizontal drive mechanism, which is fixed to the lifting plate;

[0009] A push rod is provided to support the carrier on the conveying mechanism. Multiple push rods are provided along the width direction of the vacuum furnace and all extend along the length direction of the vacuum furnace. The multiple push rods reciprocate along the length direction under the push of the horizontal drive mechanism.

[0010] The beneficial effects of this utility model are as follows:

[0011] The lifting drive mechanism moves the lifting plate and push rod upwards synchronously. The push rod abuts against the carrier, separating the carrier from the conveying mechanism. The horizontal drive mechanism moves the push rod horizontally, thus moving the carrier horizontally. The carrier is transported through alternating horizontal and vertical conveying motions. There is no need to lift the heating plate; the carrier can be transferred in both horizontal and vertical directions via the conveying device. The structure is compact, cost-effective, and meets the processing requirements of the vacuum furnace.

[0012] Furthermore, the conveying device also includes multiple lifting frames for supporting the push rod. These lifting frames are spaced apart along the length direction and are connected to the lifting drive mechanism, rising and falling synchronously with the lifting plate. The synchronous rise and fall of the lifting frames and the lifting plate provides support for the push rod in the Z-axis, preventing the push rod from bending.

[0013] Furthermore, the lifting frame has grooves for the push rod to be inserted and slid along. The push rod slides along the grooves, and the lifting frame simultaneously guides the push rod's movement along its length.

[0014] Furthermore, the lifting drive mechanism includes a first rotary drive component and a screw jack, wherein the screw jack corresponds to and is connected to the lifting plate and the lifting frame respectively;

[0015] The screw jack includes a worm and a lifting screw meshing with the worm. The worms are coaxial and adjacent to each other and are connected by a coupling. Corresponding to the lifting plate, the worm is connected to the first rotary drive component.

[0016] A first rotary drive unit drives the lifting plate and all lifting frames to rise and fall synchronously via a screw jack, saving costs.

[0017] Furthermore, the horizontal drive mechanism includes a horizontal sliding block, which reciprocates along the lifting plate in the length direction under the drive of the horizontal drive assembly. The push rod is fixedly connected to the horizontal sliding block. When the horizontal sliding block moves along the length direction, it drives all the push rods to move synchronously, improving the synchronicity of the push rod movement.

[0018] Furthermore, a first detection unit is fixed on the lifting plate, which is used to detect the moving distance of the horizontal sliding block, and the first detection unit is connected to the horizontal drive assembly.

[0019] Furthermore, the horizontal drive assembly includes a horizontal lead screw and a second rotary drive component. The second rotary drive component is fixed to the lifting plate. The horizontal lead screw is connected to the second rotary drive component and rotates along its own axis under the drive of the second rotary drive component. The horizontal sliding block is threadedly connected to the horizontal lead screw.

[0020] Furthermore, the conveying mechanism includes a support frame, on which two synchronously driven conveyor belts are arranged along the width direction, and the lifting plate is located between the two conveyor belts.

[0021] Furthermore, the support frame is provided with a second detection unit and a third detection unit. The second detection unit is used to detect the position of the carrier on the conveyor belt, and the third detection unit is used to detect the lifting height of the lifting plate.

[0022] Furthermore, a heating plate fixed inside the vacuum furnace is arranged between the lifting frames. The upper surface of the heating plate has a downward-facing relief groove corresponding to the push rod. The push rod can be embedded in the relief groove so that it is lower than the upper surface of the groove. The relief groove provides space for the push rod to rise and fall. Attached Figure Description

[0023] Figure 1 This is a side view schematic diagram of an embodiment of the present utility model;

[0024] Figure 2 This is a three-dimensional structural diagram of a conveying device in an embodiment of the present utility model;

[0025] Figure 3 This is a three-dimensional structural diagram showing the connection between the lifting drive mechanism and the horizontal drive mechanism in an embodiment of this utility model;

[0026] Figure 4 This is a three-dimensional structural diagram of the conveying mechanism in an embodiment of the present utility model;

[0027] Figure 5 This is a schematic diagram showing the cooperation between the conveying device and the heating plate in an embodiment of this utility model.

[0028] In the picture:

[0029] 100. First conveying device; 200. Second conveying device;

[0030] 1. Conveying mechanism; 11. Support frame; 12. Conveyor belt;

[0031] 2. Lifting drive mechanism; 21. First rotary drive component; 22. Screw jack; 23. Coupling;

[0032] 3. Lifting plate;

[0033] 4. Horizontal drive mechanism; 41. Horizontal sliding block; 42. Horizontal lead screw; 43. Second rotary drive component;

[0034] 5. Push rod;

[0035] 6. Lifting frame; 61. Groove;

[0036] 7. Heating plate; 71. Leaving groove;

[0037] 811, First through-beam sensor; 812, First light-shielding plate; 821, Contact sensor; 831, Second through-beam sensor; 832, Second light-shielding plate. Detailed Implementation

[0038] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the scope of protection of the present invention.

[0039] In the description of this application, the arrow X in all the figures points in the length direction, the arrow Y points in the width direction, and the arrow Z points in the vertical direction.

[0040] This utility model discloses a conveying device for a vacuum furnace, see attached document. Figure 1 As shown, two conveying devices are arranged along the length of the vacuum furnace. The two conveying devices are a first conveying device 100 and a second conveying device 200, and the two conveying devices have the same structure. The two conveying devices, after docking, pass through the vacuum furnace and are used to transport the carrier.

[0041] See appendix Figure 1 and attached Figure 2 As shown, the conveying device includes a conveying mechanism 1, a lifting drive mechanism 2, a lifting plate 3, a horizontal drive mechanism 4, and a push rod 5.

[0042] The conveying mechanism 1 is fixed at the outlet or inlet of the vacuum furnace. Conveying mechanism 1 is used to transport external carriers from the inlet into the vacuum furnace and to transport them out of the vacuum furnace from the outlet. In other words, conveying mechanism 1 is responsible for loading and unloading at the inlet and outlet. The lifting mechanism is fixed inside the vacuum furnace. The lifting plate 3 is connected to the lifting drive mechanism 2 and is lifted and lowered under the drive of the lifting mechanism. The lifting plate 3 is located at the position of conveying mechanism 1. The horizontal drive component and push rod 5 rise and fall synchronously with the lifting plate 3. When the push rod 5 moves upward, it can lift the carrier on the conveying mechanism 1 upward and detach it from the conveying mechanism 1. The horizontal drive mechanism 4 is fixed on the lifting plate 3. The push rod 5 is used to support the carrier on the conveying mechanism 1. Multiple push rods 5 are arranged along the width direction of the vacuum furnace and extend along the length direction of the vacuum furnace. Multiple push rods 5 reciprocate along the length direction under the push of the horizontal drive mechanism 4. When push rod 5 carries the carrier and moves along the X direction, it can drive the carrier on it to move along the X direction inside the vacuum furnace; and when it moves down and separates from the carrier, it can move along the X direction to reset.

[0043] In this embodiment, after the conveying mechanism 1 delivers the carrier to its position, the lifting drive mechanism 2 activates, causing the lifting plate 3 and push rod 5 to move upwards synchronously. The push rod 5 abuts against the carrier, separating the carrier from the conveying mechanism 1. The horizontal drive mechanism 4 is activated, driving the push rod 5 to move back and forth in the X direction. At this time, the height of the push rod 5 is higher than the upper surface height of the heating plate 7 inside the vacuum furnace. After the push rod 5 moves the carrier to its position in the X direction, the lifting drive mechanism 2 is activated, causing the lifting plate 3 and push rod 5 to move downwards until the carrier stops on the surface of the heating plate 7. The horizontal drive mechanism 4 is activated, causing the push rod 5 to move back to its original position along the X direction towards the conveying mechanism 1. After the carrier is heated for a certain period of time, the push rod 5 rises back to its initial position, and the above movement is repeated thereafter. The carrier is transported through alternating horizontal and vertical conveying movements, eliminating the need for the lifting heating plate 7. The conveying device in this embodiment can achieve the transfer of the carrier in both horizontal and vertical directions, meeting the processing requirements of the vacuum furnace.

[0044] In one embodiment, because the push rod 5 is relatively long, relying solely on the horizontal drive mechanism 4 to fix the push rod 5 may not guarantee its horizontal position, as it may bend due to its own weight, affecting the transport of the carrier. Therefore, the conveying device also includes multiple lifting frames 6 for supporting the push rod 5. The lifting frames 6 are spaced apart along the length direction, connected to the lifting drive mechanism 2, and rise and fall synchronously with the lifting plate 3. The lifting frames 6 and the lifting plate 3 rise and fall synchronously, and the lifting frames 6 provide support for the push rod 5 in the Z direction, preventing the push rod 5 from bending.

[0045] In one embodiment, the lifting frame 6 has a groove 61 for the push rod 5 to be inserted and slid. The push rod 5 slides along the groove 61, and the lifting frame 6 simultaneously guides the movement of the push rod 5 in the X direction. For ease of processing and assembly, the groove 61 is formed by a downward indentation from the upper surface of the lifting frame 6, and the lifting rod is at least partially embedded within the groove 61.

[0046] In one embodiment, a protective layer is also provided in the groove 61. The protective layer is made of a wear-resistant material, which can extend the service life of the lifting frame 6 and the push rod 5 and reduce the wear caused by the sliding of the push rod 5.

[0047] See appendix Figure 3 As shown, the lifting drive mechanism 2 includes a first rotary drive component 21 and a screw jack 22, with each screw jack 22 corresponding to and connected to the lifting plate 3 and the lifting frame 6. In this embodiment, one first rotary drive component 21 drives all screw jacks 22 to rise and fall, meaning that one first rotary drive component 21 drives the lifting plate 3 and all lifting frames 6 to rise and fall synchronously.

[0048] The screw jack 22 includes a housing, a worm gear, and a lifting screw meshing with the worm gear. The worm gear is rotatably connected inside the housing, and the lifting screw can move up and down along the housing. A corresponding lifting plate 3 or lifting frame 6 is fixed on the lifting screw. Coaxial and adjacent worm gears are connected via a coupling 23, at which point all the worm gears form a single rod. The worm gear corresponding to the lifting plate 3 is connected to the first rotary drive component 21. The first rotary drive component 21 is fixed inside the vacuum furnace, and when rotating forward and reverse, it can drive all the lifting screws to move up and down synchronously.

[0049] A guide plate is fixed on the housing, and a guide rod that moves up and down along the guide plate is fixed on the lifting frame 6 to improve the stability of the lifting frame 6.

[0050] See appendix Figure 3 As shown, the horizontal drive mechanism 4 includes a horizontal sliding block 41. Driven by the horizontal drive assembly, the horizontal sliding block 41 reciprocates along the lifting plate 3 in the length direction. The push rods 5 are fixedly connected to the horizontal sliding block 41. When the horizontal sliding block 41 moves along the X-direction, it drives all the push rods 5 to move synchronously, improving the synchronicity of the push rods 5's movement.

[0051] The horizontal drive assembly includes a horizontal lead screw 42 and a second rotary drive component 43. The second rotary drive component 43 is fixed to the lifting plate 3, and the horizontal lead screw 42 extends along the X-direction and is rotatably connected to the lifting plate 3. The horizontal lead screw 42 is connected to the second rotary drive component 43 and rotates along its own axis under the drive of the second rotary drive component 43. The horizontal sliding block 41 is threadedly connected to the horizontal lead screw 42. When the second drive component reverses direction, the horizontal sliding block 41 and the push rod 5 can be driven to reciprocate synchronously through the horizontal lead screw 42.

[0052] A slide rail is fixed on the lifting plate 3, and the horizontal sliding block 41 slides along the slide rail, which guides the sliding of the horizontal sliding block 41.

[0053] In one embodiment, to save space, the second rotary drive 43 is fixed on the lower surface of the lifting plate 3. The second rotary drive 43 is linked with the horizontal lead screw 42 through a transmission assembly, which can be a transmission belt and a rotating wheel.

[0054] To monitor the real-time movement distance of the push rod 5 and determine whether it has reached its designated position in the X-axis direction, a first detection unit is fixed to the lifting plate 3. This first detection unit detects the movement distance of the horizontal sliding block 41 and is connected to the horizontal drive assembly. The first detection unit includes two first through-beam sensors 811 fixed to the lifting plate 3 and a first light-shielding plate 812 fixed to the horizontal sliding block 41. The two first through-beam sensors 811 are spaced apart along the X-axis, and the first light-shielding plate 812 blocks the through-beam light emitted by the two first through-beam sensors 811. When the through-beam light emitted by the first through-beam sensors 811 is blocked, it indicates that the horizontal sliding block 41 has reached its limit position. At this point, the horizontal drive assembly stops operating and waits for the lifting drive mechanism 2 to operate.

[0055] See appendix Figure 4 As shown, the conveying mechanism 1 includes a support frame 11, which is fixed inside the vacuum furnace. Two synchronously driven conveyor belts 12 are arranged on the support frame 11 along its width direction. A lifting plate 3 is located between the two conveyor belts 12. The conveyor belts 12 are used to transport the vehicle. The lifting plate 3, located between the two rotating belts, will not interfere with the conveyor belts 12. Simultaneously, when the lifting plate 3 is raised or lowered, it can lift the vehicle on the conveyor belts 12 and push the rod 5 to transport the vehicle.

[0056] The support frame 11 is equipped with a second inspection section and a third inspection section.

[0057] The second detection unit is used to detect the position of the carrier on the conveyor belt 12. The second detection unit includes two contact sensors 821 arranged at intervals along the X direction. When one contact sensor 821 generates a signal, it indicates that a carrier is placed on the conveyor belt 12 to be transferred, and at this time the conveyor belt 12 moves to transport the carrier. When the other contact sensor 821 generates a signal, it indicates that the carrier has been transferred to the correct position on the conveyor belt 12, and at this time the conveyor belt stops.

[0058] The third detection unit is used to detect the lifting height of the lifting plate 3. The third detection unit includes two second beam sensors 831 arranged at intervals along the Z direction. A second light-shielding plate 832 is fixed on the lifting plate 3 and moves synchronously with it. The second light-shielding plate 832 can block the beams emitted by the two second beam sensors 831. When the beams emitted by the second beam sensors 831 are blocked, it indicates that the lifting plate 3 has moved to its limit position. At this time, the lifting drive mechanism 2 stops operating and waits for the horizontal drive component to operate.

[0059] See appendix Figure 5As shown, a heating plate 7 fixed inside the vacuum furnace is arranged between the lifting frames 6. The upper surface of the heating plate 7 has a downward-facing relief groove 71 corresponding to the push rod 5. During the lifting process, the push rod 5 can be higher or lower than the upper surface of the heating plate 7. When the height of the push rod 5 is higher than the upper surface of the heating plate 7, the push rod 5 can drive the carrier to move in the X direction. When the height of the push rod 5 is lower than the upper surface of the heating plate 7, the push rod 5 is fully embedded in the relief groove 71, and the carrier is supported on the heating plate 7. At this time, even if the push rod 5 moves in the X direction, it will not drive the carrier to move.

[0060] In this embodiment, the first conveying device 100 is used to transport the external carrier into the vacuum furnace, and the second conveying device 200 transports the carrier out of the vacuum furnace. The two work together to realize the transport of the carrier in the vacuum furnace.

[0061] The above embodiments are only for illustrating the technical concept and features of this utility model. Their purpose is to enable those skilled in the art to understand the content of this utility model and implement it. They cannot be used to limit the protection scope of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be covered within the protection scope of this utility model.

Claims

1. A conveying device for a vacuum furnace, wherein two conveying devices are arranged along the length of the vacuum furnace, and the two conveying devices are connected and used to transport a carrier, characterized in that: The conveying device includes: A conveying mechanism, fixed at the outlet or inlet of the vacuum furnace, is used to convey the carrier; A lifting drive mechanism is fixed inside the vacuum furnace; A lifting plate, which is connected to the lifting drive mechanism and moves up and down under the drive of the lifting mechanism, and the lifting plate is located at the position of the conveying mechanism; A horizontal drive mechanism, which is fixed to the lifting plate; A push rod is provided to support the carrier on the conveying mechanism. Multiple push rods are provided along the width direction of the vacuum furnace and all extend along the length direction of the vacuum furnace. The multiple push rods reciprocate along the length direction under the push of the horizontal drive mechanism.

2. The conveying device for a vacuum furnace according to claim 1, characterized in that: The conveying device also includes multiple lifting frames for supporting the push rod. The lifting frames are spaced apart along the length direction. The lifting frames are connected to the lifting drive mechanism and rise and fall synchronously with the lifting plate.

3. The conveying device for a vacuum furnace according to claim 2, characterized in that: The lifting frame has grooves for the push rod to be inserted and slid.

4. The conveying device for a vacuum furnace according to claim 2, characterized in that: The lifting drive mechanism includes a first rotary drive component and a screw jack, wherein the screw jack corresponds to and is connected to the lifting plate and the lifting frame respectively; The screw jack includes a worm and a lifting screw meshing with the worm. The worms are coaxial and adjacent to each other and are connected by a coupling. Corresponding to the lifting plate, the worm is connected to the first rotary drive component.

5. The conveying device for a vacuum furnace according to claim 1, characterized in that: The horizontal drive mechanism includes a horizontal sliding block, which reciprocates along the lifting plate in the length direction under the drive of the horizontal drive assembly, and the push rod is fixedly connected to the horizontal sliding block.

6. The conveying device for a vacuum furnace according to claim 5, characterized in that: A first detection unit is fixed on the lifting plate. The first detection unit is used to detect the moving distance of the horizontal sliding block. The first detection unit is connected to the horizontal drive assembly.

7. The conveying device for a vacuum furnace according to claim 5, characterized in that: The horizontal drive assembly includes a horizontal lead screw and a second rotary drive component. The second rotary drive component is fixed on the lifting plate. The horizontal lead screw is connected to the second rotary drive component and rotates along its own axis under the drive of the second rotary drive component. The horizontal sliding block is threadedly connected to the horizontal lead screw.

8. The conveying device for a vacuum furnace according to claim 1, characterized in that: The conveying mechanism includes a support frame, on which two synchronously driven conveyor belts are arranged along the width direction, and the lifting plate is located between the two conveyor belts.

9. The conveying device for a vacuum furnace according to claim 8, characterized in that: The support frame is equipped with a second detection unit and a third detection unit. The second detection unit is used to detect the position of the carrier on the conveyor belt, and the third detection unit is used to detect the lifting height of the lifting plate.

10. The conveying device for a vacuum furnace according to any one of claims 2-4, characterized in that: A heating plate fixed inside the vacuum furnace is provided between the lifting frames. The upper surface of the heating plate has a relief groove corresponding to the push rod. The push rod can be embedded in the relief groove so that the push rod is lower than the upper surface of the relief groove.

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